Composite cable and wheel hub motor

Abstract

The utility model discloses a kind of composite cable and hub motor, wherein composite cable includes wear-resistant layer, temperature-resistant layer and core, wear-resistant layer is made of fluorine rubber, or, made of ternary ethylene-propylene rubber and EVM rubber rubber blend rubber, temperature-resistant layer is silicone rubber, wherein, wear-resistant layer wraps temperature-resistant layer, temperature-resistant layer wraps core, by the layered design of wear-resistant layer and temperature-resistant layer, only use fluorine rubber in outermost layer to ensure wear resistance, inner layer uses lighter and temperature-resistant silicone rubber, substantially reduce the amount of high-cost fluorine rubber, while the temperature resistance of silicone rubber covers inner layer protection demand;Or outer layer uses EPDM and EVM rubber blend rubber, utilize its inherent wear resistance to meet outer layer demand, inner layer still uses silicone rubber to ensure temperature resistance, by material blending further optimize outer layer performance, so that the above two technical solutions can reach in guaranteeing wear resistance and temperature resistance, significantly reduce cable overall weight and cost.

Description

Technical Field

[0001] This utility model relates to the technical field of hub motor accessories, and in particular to a composite cable and hub motor. Background Technology

[0002] Traditional cable sheathing materials, such as silicone rubber and polyimide, which have excellent high-temperature resistance, typically have low hardness and insufficient abrasion resistance. Under mechanical friction or frequent bending conditions, they are prone to surface damage, leading to insulation failure or signal interference. While materials with outstanding abrasion resistance (such as polyurethane and nylon) can resist physical wear, their temperature limits are generally below 150°C. In high-temperature environments, they are prone to softening and deformation, and may even release toxic gases, failing to meet the requirements of high-temperature operating scenarios. This contradiction between temperature resistance and abrasion resistance makes it difficult for traditional materials to simultaneously meet the requirements of high-end cables for long lifespan and high safety.

[0003] To address the aforementioned issues, fluororubber (FKM), due to its unique molecular structure, has been introduced into the cable sheathing field. The main chain of fluororubber is composed of carbon-carbon bonds, while the side chains contain high-energy (448 kJ / mol) carbon-fluorine bonds, forming a dense shielding layer. This gives it excellent temperature resistance (long-term operating temperature up to 250℃), chemical corrosion resistance, and low air permeability. Simultaneously, fluororubber has high hardness (Shore hardness 80-90), and its abrasion resistance is significantly superior to conventional rubber materials. However, the application of fluororubber has two major drawbacks: firstly, its density is as high as 1.82-1.86 g / cm³. 3 Fluororubber cables are approximately twice the weight of polyethylene. Using fluororubber for the entire cable sheath would significantly increase the overall weight, hindering lightweight design. Secondly, the high cost of fluororubber raw materials and its complex processing (requiring high-temperature vulcanization) further increases manufacturing costs. Therefore, fluororubber-sheathed cables are largely confined to high-end fields such as aerospace and nuclear power, making large-scale adoption in civilian and industrial sectors difficult. Utility Model Content

[0004] In order to overcome at least one of the defects mentioned above in the prior art, the present invention provides a composite cable and hub motor, which can solve the problems of high specific gravity and high cost caused by using only fluororubber for the cable sheath.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A composite cable, comprising:

[0007] The wear-resistant layer is made of fluororubber, or is made of a blend of EPDM rubber and EVM rubber;

[0008] A heat-resistant layer, wherein the heat-resistant layer is silicone rubber;

[0009] wire core;

[0010] The wear-resistant layer encloses the heat-resistant layer, and the heat-resistant layer encloses the wire core.

[0011] Furthermore, the outer surface of the wire core is wrapped with an insulating layer, which is located inside the heat-resistant layer.

[0012] By adopting the above solution, the independent insulation layer isolates the conductor from the heat-resistant layer using highly insulating materials, blocking current leakage paths and the risk of short circuits. Furthermore, even if the abrasion-resistant layer or sheath layer is damaged, the independent insulation layer can still maintain electrical isolation between the conductor and the outside environment, preventing electric shock accidents.

[0013] Furthermore, the wire core includes N-strand electrical cores and M-strand signal cores, and the outer surface of all the electrical cores and all the signal cores is covered with an insulating layer.

[0014] By adopting the above solution, multi-phase power transmission and multi-type signal acquisition are integrated to meet the needs of complex systems. Independent insulation layers isolate strong and weak electrical signals, improving system stability. The multi-strand structure enhances flexibility and adapts to complex wiring scenarios.

[0015] Furthermore, the number of battery cells N=3, and the three battery cells include a first phase wire, a second phase wire, and a third phase wire, all of which are wrapped with the insulating layer.

[0016] By adopting the above scheme, the three-phase separation and independent insulation layer ensure balanced load, efficient transmission and phase-to-phase short-circuit protection.

[0017] Furthermore, the number of signal wire cores M=6, and the six signal wires include a power wire, a ground wire, a first signal wire, a second signal wire, a third signal wire, and a temperature sensor wire. The power wire, the ground wire, the first signal wire, the second signal wire, the third signal wire, and the temperature sensor wire are all wrapped with the insulating layer.

[0018] By adopting the above scheme, the power supply line, ground line, first signal line, second signal line, third signal line, and temperature sensor line are integrated into a composite cable to meet the needs of complex systems. The power supply line powers the Hall sensor in the hub motor. The ground line forms a current loop with the power supply line. The first, second, and third signal lines correspond to the three equally spaced Hall sensors in the hub motor, thereby transmitting rotor position signals for electronic commutation control. The temperature sensor line monitors the motor temperature to prevent overheating.

[0019] Furthermore, it also includes a wire harness branching component, which has N+M branch holes, and all the battery cells and all the signal wires are respectively threaded through the N+M branch holes.

[0020] By adopting the above scheme, the outer surface of the battery core and signal core (or the corresponding outer surface of the insulation layer) is in direct contact with the inner wall of the branch hole of the wire harness branch component, forming a physical sealing interface and improving the waterproof sealing performance of the composite cable.

[0021] Furthermore, it also includes a locking clamp, which is sleeved on the wire harness branch member and the locking clamp is interference-fitted with the wire harness branch member.

[0022] By adopting the above solution, the interference fit between the locking clamp and the wire harness branch component uses mechanical interlocking force to uniformly compress the outer wall of the wire harness branch component, thereby applying radial pressure to the branch hole. This results in elastic deformation of the inner wall of the branch hole towards the battery core and signal core, ultimately increasing the waterproof sealing performance at the branch hole location of the wire harness branch component.

[0023] Furthermore, all of the signal wire cores are covered by an insulation layer, which is then wrapped with a signal shielding layer.

[0024] By adopting the above scheme, the insulation layer of the signal core is wrapped with a signal shielding layer to block external noise and crosstalk between cores, improve signal stability, reduce attenuation and distortion, and meet the needs of high-speed communication.

[0025] This utility model also provides a hub motor, comprising:

[0026] A hub motor body, the hub motor body having a motor shaft having a wire-passing hole;

[0027] The aforementioned composite cable is inserted into the cable passage hole.

[0028] By adopting the above solution, the hub motor uses composite cables as lead-out cables. Composite cables have the advantages of low specific gravity, good wear resistance, good temperature resistance, and low cost, thereby improving the durability of the hub motor and reducing the overall production cost of the hub motor.

[0029] Furthermore, the composite cable includes a sealing sleeve, which is fitted onto the outer surface of the wear-resistant layer. The sealing sleeve has an elastic sealing part that abuts against the inner wall of the wire passage hole.

[0030] By adopting the above solution, the elastic sealing part is tightly abutted against the inner wall of the wire hole, forming a reliable dynamic sealing structure, which effectively prevents external pollutants such as moisture, dust, and oil from entering the hub motor, improves the protection level of the hub motor in harsh environments, and ensures the operational stability of the hub motor.

[0031] In summary, the composite cable and hub motor provided by this utility model have the following technical effects:

[0032] 1. The specific gravity of fluororubber (FKM) is approximately 1.9 g / cm³. 3 The specific gravity of silicone rubber is 1.05-1.15 g / cm³. 3 By using only fluororubber for the wear-resistant layer and a lower-density silicone rubber for the inner heat-resistant layer to wrap the core, the proportion of fluororubber used can be significantly reduced, thereby reducing the overall weight and cost of the composite cable. In addition, using fluororubber as the wear-resistant layer can ensure the wear resistance of the composite cable, and using silicone rubber with good temperature resistance in the heat-resistant layer inside the wear-resistant layer can ensure the temperature resistance of the composite cable.

[0033] 2. The specific gravity of ethylene propylene diene monomer (EPDM) rubber is 0.85-0.95 g / cm³. 3 The specific gravity of EVM rubber is 0.90-1.00 g / cm³. 3 The specific gravity of EPDM and EVM blends is significantly lower than that of fluororubber. The specific gravity of EPDM and EVM blends ranges from 0.88 to 1.5 g / cm³. 3 Between, and silicone rubber (1.05-1.15 g / cm³) 3 When combined, the weight of the composite cable can be reduced, and the cost of EPDM and EVM rubber is much lower than that of fluororubber, thus reducing the overall weight and cost of the composite cable. Furthermore, the EPDM and EVM blend has superior abrasion resistance, ensuring the abrasion resistance performance of the composite cable. The use of silicone rubber with good temperature resistance in the temperature-resistant layer inside the abrasion-resistant layer ensures the temperature resistance performance of the composite cable. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the composite cable structure of this utility model;

[0035] Figure 2 This is an enlarged schematic diagram of the composite cable structure of this utility model;

[0036] Figure 3 A schematic diagram of the composite cable of this utility model with a signal shielding layer.

[0037] Figure 4 A schematic diagram showing the structure of the composite cable of this utility model with wire harness branching parts and locking clamps;

[0038] Figure 5 This is a schematic diagram of the wire harness branch component and locking clamp structure of this utility model;

[0039] Figure 6 A schematic diagram of the composite cable of this utility model with a sealing sleeve.

[0040] Figure 7This is a three-dimensional structural diagram of the sealing sleeve of this utility model.

[0041] The meanings of the reference numerals in the attached drawings are as follows: 1. Wear-resistant layer; 2. Temperature-resistant layer; 3. Wire core; 31. First phase wire; 32. Second phase wire; 33. Third phase wire; 34. Power line; 35. Ground wire; 36. First signal wire; 37. Second signal wire; 38. Third signal wire; 39. Temperature sensor wire; 4. Insulation layer; 5. Wire harness branch component; 51. Branch hole; 6. Locking clamp; 7. Signal shielding layer; 8. Sealing sleeve; 81. Elastic sealing part. Detailed Implementation

[0042] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0043] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0046] See Figures 1-7 This utility model discloses a composite cable, including a wear-resistant layer 1, a heat-resistant layer 2 and a wire core 3. The wear-resistant layer 1 is made of fluororubber, or is made of a blend of EPDM rubber and EVM rubber. The heat-resistant layer 2 is made of silicone rubber. The wear-resistant layer 1 wraps the heat-resistant layer 2, and the heat-resistant layer 2 wraps the wire core 3.

[0047] Specifically, the wear-resistant layer 1 is made of fluororubber, or a blend of EPDM and EVM rubber. The heat-resistant layer 2 is made of silicone rubber, which has excellent long-term temperature resistance, strong chemical stability, and a lower specific gravity than fluororubber, thus reducing the overall cable weight. The conductor 3 is located inside the heat-resistant layer 2. The conductors 3 can be spaced apart inside the heat-resistant layer 2 to allow normal use without an insulation layer 4.

[0048] Furthermore, the synergistic advantages of the fluororubber (FKM) wear-resistant layer 1 and the silicone rubber heat-resistant layer 2 are further enhanced by the fact that the fluororubber (FKM) has a specific gravity of 1.9 g / cm³. 3 It exhibits excellent wear resistance and can operate at temperatures up to 250℃ over long periods, but its cost is relatively high. The specific gravity of silicone rubber is 1.05-1.15 g / cm³. 3 Fluororubber exhibits strong temperature resistance and good chemical stability, but its abrasion resistance is relatively weak. In composite cables, only the outer abrasion-resistant layer 1 uses fluororubber, directly contacting the external environment to leverage its high abrasion resistance. The temperature-resistant layer 2 uses silicone rubber to wrap the core 3, providing high-temperature protection. Simultaneously, because silicone rubber has a much lower specific gravity than fluororubber, it significantly reduces the overall cable's weight and cost. The outer fluororubber layer ensures the cable's service life in high-frequency mechanical abrasion scenarios (such as hub motor rotation and industrial machinery wiring), while the inner silicone rubber layer's temperature resistance meets the requirements of high-temperature operating conditions, preventing core 3 from overheating and failing.

[0049] A lightweight solution combining an EPDM / EVM blended rubber wear-resistant layer 1 and a silicone rubber heat-resistant layer 2, where the EPDM (ethylene propylene diene monomer) has a specific gravity of 0.85-0.95 g / cm³. 3 It has low cost, moderate wear resistance, and an EVM (ethylene-methacrylate rubber) specific gravity of 0.90-1.00 g / cm³. 3 It exhibits excellent oil resistance and superior abrasion resistance compared to EPDM. EPDM / EVM blend rubber: specific gravity 0.88-1.5 g / cm³. 3 (Performance optimized by adjusting the proportions) This method offers lower costs and sufficient wear resistance for applications such as hub motors. The EPDM / EVM blended rubber technology is well-documented in existing technologies and publications; this solution utilizes existing EPDM / EVM blended rubber mixing techniques. The EPDM / EVM blended rubber has a lower specific gravity than fluororubber, further reducing the specific gravity compared to the fluororubber solution.

[0050] See Figure 1-3 As shown, in some embodiments, the outer surface of the core 3 is wrapped with an insulating layer 4, which is located inside the heat-resistant layer 2.

[0051] Specifically, the outer surface of the conductor 3 is wrapped with an insulation layer 4, which is located inside the heat-resistant layer 2. The insulation layer 4 can be made of a polymer material with high insulation performance, such as polyethylene or cross-linked polyethylene, or other insulating materials, and is not limited here. The independent insulation layer 4 isolates the conductor 3 from the heat-resistant layer 2 through the high insulation material, blocking the current leakage path and the risk of short circuit. Even if the wear-resistant layer 1 or the sheath layer is damaged, the independent insulation layer 4 can still maintain the electrical isolation between the conductor and the outside world, avoiding electric shock accidents.

[0052] See Figure 1-3 As shown, in some embodiments, the wire core 3 includes N-strand electrical cores and M-strand signal cores 3, and the outer surface of all electrical cores and all signal cores 3 is covered with an insulation layer 4.

[0053] Specifically, the system integrates multi-phase electrical transmission and multi-type signal acquisition to meet the needs of complex systems. An independent insulation layer 4 isolates high-voltage and low-voltage signals, improving system stability. The multi-strand structure enhances flexibility and adapts to complex wiring scenarios. Each battery core and each signal core 3 has an independent insulation layer 4, which can block current leakage paths and short-circuit risks.

[0054] It should be noted that, due to the small cross-sectional size of the signal core 3, the insulation layer 4 of the signal core 3 is not shown in the attached drawing in order to avoid affecting the normal display of other technical features. However, the actual signal core 3 is provided with an insulation layer 4.

[0055] See Figure 1-3 As shown, in some embodiments, the number of battery cells N=3, and the three battery cells include a first phase wire 31, a second phase wire 32 and a third phase wire 33, all of which are wrapped with an insulating layer 4.

[0056] Specifically, the three battery cells—first phase wire 31, second phase wire 32, and third phase wire 33—correspond to the three phases of the three-phase AC power supply, respectively, and are used to transmit three-phase balanced current for driving the hub motor to operate normally. The separation of the three phases and the independent insulation layer 4 ensure balanced load, efficient transmission, and phase-to-phase short-circuit protection.

[0057] See Figure 1-3 As shown, in some embodiments, the number of signal cores 3 is M=6. The six signal lines include a power line 34, a ground line 35, a first signal line 36, a second signal line 37, a third signal line 38, and a temperature sensor line 39. The power line 34, the ground line 35, the first signal line 36, the second signal line 37, the third signal line 38, and the temperature sensor line 39 are all wrapped with an insulating layer 4.

[0058] Specifically, the signal lines include a power supply line 34, a ground line 35, a first signal line 36, a second signal line 37, a third signal line 38, and a temperature sensor line 39. The power supply line 34 powers the Hall sensors in the hub motor. The ground line 35 forms a current loop with the power supply line 34. The first signal line 36, the second signal line 37, and the third signal line 38 correspond to three equally spaced Hall sensors in the hub motor, thereby transmitting rotor position signals for electronic commutation control. The temperature sensor line 39 monitors the motor temperature to prevent overheating.

[0059] See Figure 4-5 As shown, in some embodiments, the composite cable also includes a wire harness branch member 5, which has N+M branch holes 51, and all the battery cores and all the signal cores 3 are respectively threaded through the N+M branch holes 51.

[0060] Specifically, the wire harness branch component 5 has N+M branch holes 51, which are arranged according to functional requirements (e.g., the branch hole 51 corresponding to the battery core is in the center, and the branch hole 51 corresponding to the signal line is located on one side of the wire harness branch component 5). The battery core and the signal line core 3 are respectively inserted into the N+M branch holes 51. The battery core and the signal line core 3 are attached to their corresponding branch holes 51, or the insulation layer 4 on the outside of the battery core and the signal line core 3 is attached to their corresponding branch holes 51, so as to ensure the sealing of the contact position after the battery core and the signal line core 3 are installed in the branch holes 51, thereby improving the overall waterproof sealing of the composite cable.

[0061] Optionally, the wire harness branch 5 can be made of flexible polymer material, and the diameter of the branch hole 51 is slightly smaller than the size of its corresponding battery core or signal core 3. This allows the branch hole 51 to form an interference fit with the battery core and signal core 3 respectively after the battery core and signal core 3 pass through the branch hole 51, further improving the overall waterproof sealing of the composite cable.

[0062] Optionally, the wire harness branch 5 is located at one end of the composite cable, thereby sealing the locations where the composite cable needs to be connected to various components of the hub motor, thus ensuring the waterproof sealing of the internal battery core and signal core 3 branches of the composite cable.

[0063] See Figure 4-5 As shown, in some embodiments, the composite cable further includes a locking clamp 6, which is sleeved on the wire harness branch member 5, and the locking clamp 6 and the wire harness branch member 5 are interference-fitted.

[0064] Specifically, the interference fit between the locking clamp 6 and the wire harness branch 5 uses mechanical interlocking force to uniformly compress the outer wall of the wire harness branch 5, thereby applying radial pressure to the branch hole 51. This causes the inner wall of the branch hole 51 to undergo elastic deformation towards the battery core and signal core 3, ultimately increasing the waterproof sealing performance of the branch hole 51 in the wire harness branch 5.

[0065] When the wire harness branch component 5 is made of flexible polymer material, the pressure applied by the locking clamp 6 to the wire harness branch component 5 can be better transferred to the hole wall of the branch hole 51, thereby improving the sealing effect at the branch hole 51.

[0066] See Figure 3 As shown, in some embodiments, all signal cores 3 are surrounded by an insulation layer 4 and an external signal shielding layer 7.

[0067] Specifically, all signal cores 3 are surrounded by an insulation layer 4, which is then wrapped with a signal shielding layer 7. This shielding layer 7 can be applied to the insulation layer 4 of each signal core 3, or multiple signal cores 3 can be hinged together and then wrapped with a signal shielding layer 7. The signal shielding layer 7 can be a metal shielding layer (aluminum foil, copper mesh, or a composite structure), combined with a single-point or double-point grounding design. This composite cable achieves efficient suppression of electromagnetic interference (EMI) and crosstalk. The material selection, structural design, and grounding method of the signal shielding layer 7 need to be optimized according to the interference frequency and application scenario. Furthermore, the protection of the temperature-resistant layer 2 and the wear-resistant layer 1 ensures the stability and durability of the shielding layer under dynamic operating conditions.

[0068] See Figure 1-7 As shown, this utility model also provides a hub motor, including a hub motor body and the aforementioned composite cable. The hub motor body has a motor shaft with a wire hole, and the composite cable passes through the wire hole.

[0069] Specifically, the hub motor body has a motor shaft, and the motor shaft has a wire hole. The diameter of the wire hole corresponds to the outer diameter of the composite cable to ensure smooth cable installation. The hub motor uses a composite cable as the lead cable. The composite cable has the advantages of low specific gravity, good wear resistance, good temperature resistance and low cost, thereby improving the durability of the hub motor and reducing the overall production cost of the hub motor.

[0070] See Figure 6-7 As shown, in some embodiments, the composite cable includes a sealing sleeve 8, which is fitted onto the outer surface of the wear-resistant layer 1. The sealing sleeve 8 is provided with an elastic sealing part 81, which abuts against the inner wall of the wire hole.

[0071] Specifically, the elastic sealing part 81 is in close contact with the inner wall of the wire hole to form a reliable dynamic sealing structure, which effectively prevents external pollutants such as moisture, dust, and oil from entering the hub motor, improves the protection level of the hub motor in harsh environments, and ensures the stability of the hub motor operation.

[0072] Furthermore, the elastic sealing part 81 can be a protruding flange on the sealing sleeve 8, the flange size of which is slightly larger than the inner wall of the wire hole, so that the flange can fit tightly with the hole wall of the wire hole, thereby ensuring the sealing performance of the composite cable and the wire hole.

[0073] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A composite cable, characterized by, It comprises: a wear-resistant layer (1) made of fluororubber or a rubber blend of ethylene propylene diene rubber and EVM rubber; a temperature-resistant layer (2) made of silicone rubber; a core (3); wherein the wear-resistant layer (1) wraps the temperature-resistant layer (2), and the temperature-resistant layer (2) wraps the core (3).

2. A composite cable according to claim 1, characterized in that An insulating layer (4) is wrapped on the outer surface of the core (3) and located in the temperature-resistant layer (2).

3. A composite cable according to claim 1, wherein The core (3) comprises N-core electric cores and M-core signal cores (3), and the outer surfaces of all the electric cores and all the signal cores (3) are wrapped with the insulating layer (4).

4. A composite cable according to claim 3, wherein The number of the electric cores N=3, and the three electric cores comprise a first phase line (31), a second phase line (32), and a third phase line (33), all of which are wrapped with the insulating layer (4).

5. A composite cable according to claim 3, wherein The number of the signal cores (3) M=6, and the six signal cores comprise a power line (34), a ground line (35), a first signal line (36), a second signal line (37), a third signal line (38), and a temperature sensor line (39), all of which are wrapped with the insulating layer (4).

6. A composite cable according to claim 3, wherein It further comprises a harness branch member (5) provided with N+M branch holes (51), and all the electric cores and all the signal cores (3) are respectively and one-to-one correspondingly arranged in the N+M branch holes (51).

7. A composite cable according to claim 6, wherein It further comprises a locking hoop (6) sleeved on the harness branch member (5) and in interference fit with the harness branch member (5).

8. A composite cable according to any one of claims 3 to 7, characterised in that, The signal shielding layer (7) is wrapped on the outside of the insulating layer (4) wrapped on all the signal cores (3).

9. A wheel hub motor, characterized by It comprises: a hub motor body having a motor shaft with a wire hole; the composite cable of any one of claims 1-8 is arranged in the wire hole.

10. The wheel hub motor according to claim 9, characterized in that The composite cable comprises a sealing sleeve (8) sleeved on the outer surface of the wear-resistant layer (1), and the sealing sleeve (8) is provided with an elastic sealing portion (81) abutting against the inner wall of the wire hole.

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