A wheel speed sensor wiring harness assembly for an electric vehicle

Abstract

The present application relates to electric automobile wiring harness technical field, specifically for a kind of electric automobile wheel speed sensor wiring harness assembly, including wiring harness connector and wheel speed sensor, further include straight sleeve, positioning sleeve, limiting component, curved sleeve, corrugated sleeve and silica gel film, the corrugated sleeve both sides are connected with curved sleeve, the end of curved sleeve is connected with straight sleeve.This application forms air bag structure by setting straight sleeve and curved sleeve on the outside of wire body, and when the curve part is stretched during front wheel steering, large-span torsion wire body, combined with straight sleeve and curved sleeve through positioning sleeve, can further be relatively displaced with limiting component, solve the problem that the wiring harness assembly connected by wheel speed sensor at the front wheel of electric automobile is damaged due to frequent force twisting at both ends of wiring harness assembly during vehicle turning, and due to the large exposed area caused by reserved redundancy, easy to be damaged by splashing sand impact.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle wiring harness technology, specifically to a wheel speed sensor wiring harness assembly for electric vehicles. Background Technology

[0002] Electric vehicles are vehicles powered by onboard electricity, using electric motors to drive their wheels. They are a major type of new energy vehicle. With the rapid development of the electric vehicle sector, the collection of wheel speed information is essential for the implementation of its safety systems. For example, systems such as Electronic Stability Program (ESP) and Anti-lock Braking System (ABS) both require wheel speed information.

[0003] Wheel speed sensors are typically installed on the front brake discs and rear wheel hubs, and are connected to the vehicle power connector via a specially designed wheel speed sensor wiring harness assembly to provide power to the wheel speed sensors through the vehicle power supply.

[0004] Wheel speed sensor wiring harnesses are typically fitted to the chassis suspension. Compared to wheel speed sensors mounted on the rear wheels, the wiring harnesses connected to the front wheel speed sensors are constantly pulled when the electric vehicle is turning. This can cause the wiring harness to be twisted and damaged due to stress at the connection points between the power connector and the sensor connector. At the same time, to prevent the wiring harness from breaking when the front wheels are turning, the wiring harness assembly connected to the front wheel speed sensors needs to be slightly longer, resulting in a larger exposed area. This makes the wiring harness assembly more susceptible to damage from flying sand and gravel while the electric vehicle is in motion, thus leading to a shorter lifespan for the wiring harness assembly connected to the front wheel speed sensors.

[0005] To address this, a wheel speed sensor wiring harness assembly for electric vehicles is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a wheel speed sensor wiring harness assembly for electric vehicles. By forming an airbag structure with straight and curved sleeves on the outer side of the wiring harness, and by allowing the curved section to be stretched during front wheel steering, the wiring harness undergoes a large-span twist. Combined with the positioning sleeve and the curved sleeve, which can further displace relative to the limiting component, this invention solves the problems of damage to the wiring harness assembly connected to the front wheel speed sensor during vehicle cornering due to frequent twisting and stress, and the large exposed area resulting from redundant provisions, making it susceptible to damage from flying sand and gravel. This invention significantly extends the service life of the wiring harness assembly connected to the front wheel speed sensor and ensures the normal operation of the wheel speed sensor.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An electric vehicle wheel speed sensor wiring harness assembly includes a wiring harness connector and a wheel speed sensor, as well as a straight sleeve, a positioning sleeve, a limiting component, a curved sleeve, a corrugated sleeve, and a silicone diaphragm. Curved sleeves are connected to both sides of the corrugated sleeve, and the ends of the curved sleeves are connected to the straight sleeves. The ends of the two straight sleeves are respectively connected to the wiring harness connector and the wheel speed sensor. The positioning sleeve is installed at the junction of the straight sleeve and the curved sleeve. The limiting component is installed on the surface of the positioning sleeve. The silicone diaphragm is attached to the inner side of the positioning sleeve. Both the straight sleeve and the curved sleeve have wires connecting the wiring harness connector and the wheel speed sensor inside. The length of the wire located inside the corrugated sleeve is equal to the maximum axial length of the corrugated sleeve. When the front wheel turns, the curved sleeve is first straightened, and the corrugated sleeve is gradually stretched along with the curved sleeve. When the corrugated sleeve is stretched, the internal air pressure decreases, causing the bottom surface of the silicone diaphragm to bend downwards, simultaneously releasing the locking state between the positioning sleeve and the limiting component.

[0009] Preferably, the positioning sleeve includes a positioning block, an inner half-ring, a fixing block, and a telescopic column. The positioning block has a half-ring groove on its inner side, the inner half-ring is fitted to the inner side of the positioning block, the fixing block is installed on the surface of the positioning block, and buffer grooves are provided at both ends of the fixing block. The bottom of the telescopic column is fitted to the surface of the silicone film, and the silicone film is sealed to the inner wall of the positioning block around its perimeter. In the limited position state, the top of the telescopic column is higher than the top of the positioning block.

[0010] Preferably, the outer periphery of the inner half-ring has an outer groove, and the outer periphery of the inner half-ring has a circular hole located inside the outer groove. The inner periphery of the inner half-ring is set as a conical surface. When the two positioning blocks are attached, the outer groove and the half-ring groove form a closed cavity, and the closed cavity is separated by a silicone membrane.

[0011] Preferably, the telescopic column includes a thick rod, a first spring, a thin rod, and a clearance groove. The bottom of the thick rod is attached to a silicone film, the thin rod is connected to the top of the thick rod, the first spring is connected between the top of the thick rod and the positioning block, and the clearance groove is formed on the outer periphery of the thin rod.

[0012] Preferably, the limiting component includes a mounting block, a longitudinal slide groove, a mounting hole, a through rod, and a second spring. The two longitudinal slide grooves are arranged in parallel on the bottom surface of the mounting block. The fixing block slides and fits into the longitudinal slide groove. The mounting hole is rectangularly distributed on the surface of the mounting block. The through rod is installed in the longitudinal slide groove and passes through the clearance groove of the thin rod. The two second springs are sleeved on the outer periphery of the through rod and are respectively located in two buffer grooves. The second springs abut against the fixing block and the mounting block.

[0013] Preferably, the curved sleeve has a through hole on its surface that coincides with the position of the circular hole, a memory metal wire is provided on the inner side of the curved sleeve, the memory metal wire is provided on the outer side of the wire body, and a conical ring is integrally formed at the end of the curved sleeve, and the conical ring is sealed and fitted with the inner half ring through the conical surface.

[0014] Preferably, the corrugated sleeve includes a tapered connecting cylinder, a bellows, and a third spring. The tapered connecting cylinder is connected between the end of the curved sleeve and the bellows, and the third spring is disposed between the interiors of the two tapered connecting cylinders.

[0015] Preferably, the third spring is located outside the line body, and the outer periphery of the third spring is not in contact with the bellows.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. When this invention is used for wheel speed sensors located at the front wheels, the curved sleeve can reserve a larger length for the displacement of the wheel speed sensor during steering, and convert the original twisting of the two ends of the cable into the overall twisting of the curved sleeve. This can significantly reduce the twisting amplitude of the internal cable, thereby effectively avoiding the problem that the cable in the wiring harness assembly at the front wheel brake disc is easily twisted and broken when the electric vehicle is turning. Furthermore, the cable can be quickly retracted after the turn, thereby significantly reducing the exposed area of ​​the wiring harness assembly at the bottom of the vehicle, thus effectively reducing the probability of damage from flying sand and gravel, and helping to significantly extend the service life of the wiring harness assembly.

[0018] 2. Through the design of straight sleeves, curved sleeves, corrugated sleeves, and positioning sleeves, a protective structure similar to an airbag can be formed on the outside of the wire body. This provides better protection for the internal wire body when it is inevitably hit by flying sand and gravel, thus avoiding damage to the wire body and significantly extending the service life of the wire harness assembly.

[0019] 3. Through the positioning sleeve, curved sleeve, limiting component and corrugated sleeve, when the front wheel turns sharply, the curved sleeve and corrugated sleeve are stretched in sequence, the sealing space on the side of the silicone diaphragm away from the fixed block increases, and the pressure in the sealing space decreases. The silicone diaphragm drives the telescopic column to move down and separate from the limiting component. The positioning sleeve and the limiting component can move relative to each other, further increasing the torsional span of the wire between the positioning sleeves. This greatly reduces the torsional amplitude of the wire, which helps to reduce the probability of the wire breaking due to torsion, and thus effectively extends the service life of the wire harness assembly. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the positioning sleeve and limiting component of the present invention;

[0022] Figure 3 This is a schematic diagram of the positioning sleeve of the present invention;

[0023] Figure 4This is a schematic diagram of the positioning block of the present invention;

[0024] Figure 5 This is a schematic diagram of the inner half-ring structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the telescopic column of the present invention;

[0026] Figure 7 This is a cross-sectional structural diagram of the limiting component of the present invention;

[0027] Figure 8 This is a schematic diagram of the curved sleeve of the present invention;

[0028] Figure 9 This is a cross-sectional structural diagram of the corrugated sleeve of the present invention.

[0029] In the diagram: 1. Wire harness connector; 2. Straight sleeve; 3. Positioning sleeve; 31. Positioning block; 311. Semi-annular groove; 32. Inner semi-ring; 321. Circular hole; 322. Outer groove; 323. Conical surface; 33. Fixing block; 331. Buffer groove; 34. Telescopic column; 341. Thick rod; 342. First spring; 343. Thin rod; 344. Clearance groove; 4. Limiting component; 41. Mounting block; 42. Longitudinal slide groove; 43. Mounting hole; 44. Through rod; 45. Second spring; 5. Curved sleeve; 51. Through hole; 52. Wire body; 53. Memory metal wire; 54. Conical ring; 6. Corrugated sleeve; 61. Conical connecting cylinder; 62. Corrugated pipe; 63. Third spring; 7. Wheel speed sensor; 8. Silicone diaphragm. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 9 This invention provides a wheel speed sensor wiring harness assembly for electric vehicles, the technical solution of which is as follows:

[0032] Reference Figure 1 , Figure 2 and Figure 3A wheel speed sensor wiring harness assembly for an electric vehicle includes a wiring harness connector 1 and a wheel speed sensor 7. The wiring harness connector 1 and wheel speed sensor 7 are selected according to the design of the electric vehicle. The wheel speed sensor 7 at the rear wheel is installed at the wheel hub, and the wheel speed sensor 7 at the front wheel is installed near the brake disc. The assembly also includes a straight sleeve 2, a positioning sleeve 3, a limiting component 4, a curved sleeve 5, a corrugated sleeve 6, and a silicone diaphragm 8. The straight sleeve 2 and the curved sleeve 5 are both made of polyurethane material, which has good elasticity and is easy to heat-melt connect to form a sealed space inside the straight sleeve 2, curved sleeve 5, and positioning sleeve 3. Curved sleeves 5 are connected to both sides of the corrugated sleeve 6. The ends of the curved sleeves 5 and the corrugated sleeve 6 are connected by heat melting. The curved sleeve 5 and the corrugated sleeve 6 are sealed by heat fusion. The ends of the curved sleeve 5 are connected to the straight sleeve 2. The connection between the curved sleeve 5 and the straight sleeve 2 is a heat fusion connection, forming a sealed structure. The ends of the two straight sleeves 2 are respectively connected to the wiring harness connector 1 and the wheel speed sensor 7. The connection between the ends of the straight sleeves 2 and the wiring harness connector 1 and the wheel speed sensor 7 is also a heat fusion seal. The positioning sleeve 3 is installed at the connection between the straight sleeve 2 and the curved sleeve 5. The positioning sleeve 3 not only facilitates the positioning of the straight sleeve 2 and the curved sleeve 5 for installation on the frame, but also reinforces the connection between the straight sleeve 2 and the curved sleeve 5, and improves the sealing stability between the straight sleeve 2 and the curved sleeve 5. The limiting component 4 is installed on the surface of the positioning sleeve 3. 4. Mounted on the frame by bolts, the positioning sleeve 3 and the limiting component 4 do not move relative to each other under normal conditions. Relative displacement only occurs when the front wheels turn sharply. The silicone membrane 8 adheres to the inner side of the positioning sleeve 3, forming a sealed space between the positioning sleeve 3 and the inner side of the curved sleeve 5. When the front wheels turn, the curved sleeve 5 is stretched first. When the steering angle is large, the corrugated sleeve 6 is also stretched. The increase in internal pressure of the corrugated sleeve 6 and the curved sleeve 5 during stretching is directly related to the negative pressure value generated. The silicone membrane 8 divides the sealed space into two parts. Both the straight sleeve 2 and the curved sleeve 5 have a wire 52 connecting the harness connector 1 and the wheel speed sensor 7 inside. The length of the wire 52 located inside the corrugated sleeve 6 is related to the length of the corrugated sleeve 6. The maximum axial lengths of the corrugated sleeves 6 are equal. When the curved sleeve 5 is straightened, the inner thread 52 of the corrugated sleeve 6 is gradually unfolded as the corrugated sleeve 6 is stretched to adapt to the length change between the two positioning sleeves 3. When the front wheel turns, the curved sleeve 5 is straightened first, and the corrugated sleeve 6 is gradually stretched as the curved sleeve 5 is stretched. When the corrugated sleeve 6 is stretched, the internal air pressure decreases, causing the bottom surface of the silicone membrane 8 to bend downwards. At the same time, the locking state between the positioning sleeve 3 and the limiting component 4 is released. After the positioning sleeve 3 and the limiting component 4 are released, the inner thread 52 of the positioning sleeve 3 twists with the distance between the positioning sleeves 3 as the twist span. Therefore, the twist span is increased, thereby reducing the twist angle of the thread 52 and thus preventing the thread 52 from breaking due to a large twist angle.

[0033] Reference Figure 3 and Figure 4 As one embodiment of the present invention, specifically, the positioning sleeve 3 includes a positioning block 31, an inner half-ring 32, a fixing block 33, and a telescopic column 34. The top of the positioning block 31 is horizontal, and its bottom is a semi-annular structure. A single positioning sleeve 3 is formed by two positioning blocks 31 fitted together. A semi-annular groove 311 is formed on the inner side of the positioning block 31, and the inner half-ring 32 is fitted onto the inner side of the positioning block 31. Sealing grooves are formed on the side wall of the positioning block 31 and the end of the inner half-ring 32. When the two positioning blocks 31 and the two inner half-rings 32 are fitted together, the sealing ring is placed in the sealing groove, and then... The two positioning blocks 31 are installed and fixed with bolts. Under the action of the sealing ring, the sealing effect of the internal space of the positioning sleeve 3 can be effectively guaranteed. In addition, a sealing groove is also provided at the part where the outer circumference of the inner half ring 32 fits with the positioning block 31 to ensure the sealing between the positioning block 31 and the inner half ring 32. The fixing block 33 is installed on the surface of the positioning block 31. Both ends of the fixing block 33 are provided with buffer grooves 331. The bottom of the telescopic column 34 is in contact with the surface of the silicone film 8, and the silicone film 8 is sealed and fitted with the inner wall of the positioning block 31 around its perimeter. In the limited state, the top of the telescopic column 34 is higher than the top of the positioning block 31.

[0034] Reference Figure 5 In one embodiment of the present invention, specifically, an outer groove 322 is formed on the outer periphery of the inner half-ring 32. After the inner half-ring 32 is fitted with the positioning block 31, the outer groove 322 and the half-ring groove 311 form a space similar to a ring between the positioning block 31 and the inner half-ring 32. A circular hole 321 is formed on the outer periphery of the inner half-ring 32, located inside the outer groove 322. The circular space is connected to the interior of the curved sleeve 5 through the circular hole 321. When the curved sleeve 5 and the corrugated sleeve 6 are stretched, the internal volume of the curved sleeve 5 and the corrugated sleeve 6 increases, thereby reducing the pressure. At this time, the gas in the circular space is released through the circular hole 321. When the silicone membrane 8 is inserted into the curved sleeve 5, the pressure in the annular space decreases accordingly. The pressure on the other side of the silicone membrane 8 remains unchanged. Consequently, the silicone membrane 8 bends and deforms away from the positioning block 31, which in turn causes the telescopic column 34 to move away from the fixed block 33. After the telescopic column 34 moves, it separates from the limiting component 4, thereby releasing the limiting effect between the positioning sleeve 3 and the limiting component 4. Then, the fixed block 33 can slide relative to the limiting component 4. The inner circumference of the inner semi-ring 32 is set as a conical surface 323. When the two positioning blocks 31 are in contact, the outer groove 322 and the semi-ring groove 311 form a closed chamber, and the closed chamber is separated by the silicone membrane 8.

[0035] Reference Figure 6As one embodiment of the present invention, specifically, the telescopic column 34 includes a thick rod 341, a first spring 342, a thin rod 343, and a clearance groove 344. The bottom of the thick rod 341 is attached to the silicone film 8, the thin rod 343 is connected to the top of the thick rod 341, and the first spring 342 is connected between the top of the thick rod 341 and the positioning block 31. When the thin rod 343 moves down, the first spring 342 is in a stretched state. After the thin rod 343 loses the external force, the thin rod 343 can be lifted and reset by the reset of the first spring 342. The clearance groove 344 is opened on the outer periphery of the thin rod 343, and the top of the thin rod 343 is provided with anti-slip texture. When the top of the thin rod 343 contacts the limiting component 4, the stability between the thin rod 343 and the positioning component can be ensured.

[0036] Reference Figure 4 and Figure 7 As one embodiment of the present invention, specifically, the limiting component 4 includes a mounting block 41, longitudinal grooves 42, mounting holes 43, a through rod 44, and a second spring 45. Two longitudinal grooves 42 are parallelly arranged on the bottom surface of the mounting block 41. A circular groove is formed on the inner side of the mounting block 41. In the initial state, the top of the thin rod 343 extends into the circular groove, thereby laterally limiting the thin rod 343 and the mounting block 41. The two longitudinal grooves 42 are designed to correspond to the fixing blocks 33 at the top of the two positioning blocks 31. The fixing blocks 33 slide and fit within the longitudinal grooves 42. The mounting holes 43 are rectangularly distributed on the surface of the mounting block 41. The mounting holes 43 are designed to facilitate fixing the mounting block 41 to a suitable position on the electric vehicle chassis. The through rod 44 is installed within the longitudinal grooves 42 and passes through the thin rod 34. The clearance groove 344 of the rod 3 has two second springs 45 sleeved on the outer periphery of the rod 44, and the two second springs 45 are respectively located in the two buffer grooves 331. The second springs 45 abut against the fixed block 33 and the mounting block 41. When the thin rod 343 moves down, under the action of the clearance groove 344, the movement trajectory of the thin rod 343 will not interfere with the rod 44. After the thin rod 343 moves down, the top of the thin rod 343 separates from the mounting block 41. At this time, the fixed block 33 and the mounting block 41 can slide relative to each other. When the fixed block 33 moves to the corresponding side, it squeezes the second spring 45 on that side and stretches the second spring 45 on the other side. After the external force is lost, the fixed block 33 can quickly return to its original position under the action of the second spring 45 until the top of the thin rod 343 is inserted into the circular groove on the inner side of the mounting block 41.

[0037] Reference Figure 8In one embodiment of the present invention, specifically, the curved sleeve 5 has a through hole 51 on its surface that coincides with the position of the circular hole 321. The gas inside the curved sleeve 5 communicates with the internal space of the positioning sleeve 3 through the through hole 51 and the circular hole 321. A memory metal wire 53 is provided inside the curved sleeve 5. The memory metal wire 53 is made of a "superelastic" material based on stress-induced martensitic phase transformation. Its two ends are respectively connected to the ends of the corresponding curved sleeve 5. The memory metal wire 53 is disposed in close contact with the surface of the wire body 52. The initial state is approximately S-shaped, used to limit the curved sleeve 5. After the curved sleeve 5 loses the external force, it can be restored to an approximately S-shape under the action of the memory metal wire 53. The memory metal wire 53 is set on the outside of the line body 52. ​​The end of the curved sleeve 5 is integrally formed with a conical ring 54, and the conical ring 54 is sealed and fitted with the inner half ring 32 through the conical surface 323. The conical ring 54 is made of polyurethane material and is sealed and connected to the inner half ring 32 by heat fusion, thereby fully ensuring the sealing of the internal space of the curved sleeve 5.

[0038] Reference Figure 9 As one embodiment of the present invention, specifically, the corrugated sleeve 6 includes a tapered connecting cylinder 61, a bellows 62, and a third spring 63. The tapered connecting cylinder 61 is connected between the end of the curved sleeve 5 and the bellows 62. The tapered connecting cylinder 61 and the curved sleeve 5 are made of a material with a certain elastic strength and a limited elastic range, so that when the front wheel turns, the curved sleeve 5 is preferentially transformed into a straight shape. The third spring 63 is disposed between the interiors of the two tapered connecting cylinders 61. The third spring 63 is located outside the line body 52, and the outer periphery of the third spring 63 is not in contact with the bellows 62.

[0039] Working principle: First, the limiting component 4 is fixed under the cantilever of the electric vehicle chassis, and the wheel speed sensor 7 and the wiring harness connector 1 are installed in the corresponding positions. The wheel speed sensor 7 is close to the brake disc, and the wiring harness connector 1 is plugged into and fixed to the power connector. When the front wheel turns, since the positioning sleeve 3 is limited by the limiting component 4, the two straight sleeves 2 will not be displaced when turning. Therefore, the two curved sleeves 5 will be stretched at the same time to adapt to the displacement change caused by the change of the brake disc angle. As the curved sleeve 5 is gradually stretched, the corrugated sleeve 6 is also gradually stretched. The volume of the sealed space on the side of the silicone film 8 away from the positioning block 31 increases, and its corresponding pressure decreases. Then, the silicone film 8 drives the positioning post to move away from the positioning block 31. After the end of the positioning post is separated from the limiting component 4, the positioning sleeve 3 and the limiting component 4 can further displace relative to each other. Thus, by further increasing the torsional span of the line 52 between the positioning sleeves 3, the torsional angle of the line 52 between the positioning sleeves 3 is correspondingly reduced to avoid the line 52 from breaking easily due to large-angle torsion.

[0040] Specifically, when the curved sleeve 5 is gradually stretched, the shape memory wire 53 stretches first, and the wire 52 located inside the corrugated sleeve 6 gradually unfolds to adapt to the stretching changes of the curved sleeve 5. After the curved sleeve 5 is stretched, the bellows 62 is also gradually stretched, and the third spring 63 is also stretched accordingly. When the bellows 62 is stretched, the volume of the space formed by the tapered connecting cylinder 61, the bellows 62, the curved sleeve 5, and the positioning sleeve 3 increases. Under the action of the silicone membrane 8, this sealed space is divided into two parts. However, the volume of the part of the silicone membrane 8 near the positioning block 31 does not increase. Therefore, the pressure of the other part of the sealed space decreases due to the increase in volume. Some of the air inside the part of the silicone membrane 8 away from the positioning block 31 is drawn into the curved sleeve 5. The internal deformation causes the silicone membrane 8 to bend and deform away from the positioning block 31. When the silicone membrane 8 deforms, it drives the thin rod 343 to move downward through the thick rod 341. At this time, the second spring 45 is stretched. When the top of the thin rod 343 separates from the mounting block 41, the positioning block 31 can slide along the longitudinal groove 42. Subsequently, the positioning block 31 moves along the longitudinal groove 42 towards the outer diameter side of the wheel steering, and at the same time squeezes the second spring 45 on the corresponding side. After the wheel steering is reset, under the action of the first spring 342, the second spring 45, the third spring 63, the silicone membrane 8, and the memory metal wire 53, the curved sleeve 5, the positioning sleeve 3, and the telescopic column 34 are reset. The top of the thin rod 343 contacts the mounting block 41 to prevent the positioning sleeve 3 from moving freely.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wheel speed sensor wiring harness assembly for electric vehicles, comprising a wiring harness connector (1) and a wheel speed sensor (7), characterized in that: It also includes a straight sleeve (2), a positioning sleeve (3), a limiting component (4), a curved sleeve (5), a corrugated sleeve (6), and a silicone film (8). The corrugated sleeve (6) has curved sleeves (5) connected to both sides. The ends of the curved sleeves (5) are connected to the straight sleeves (2). The ends of the two straight sleeves (2) are respectively connected to the wiring harness connector (1) and the wheel speed sensor (7). The positioning sleeve (3) is installed at the connection between the straight sleeves (2) and the curved sleeves (5). The limiting component (4) is installed on the surface of the positioning sleeve (3). The silicone film (8) is attached to the positioning sleeve (3). Inside the straight sleeve (2) and the curved sleeve (5), there is a wire (52) connecting the wire harness connector (1) and the wheel speed sensor (7). The length of the wire (52) inside the corrugated sleeve (6) is equal to the maximum axial length of the corrugated sleeve (6). When the front wheel turns, the curved sleeve (5) is straightened first, and the corrugated sleeve (6) is gradually stretched along with the curved sleeve (5). When the corrugated sleeve (6) is stretched, the internal air pressure decreases, causing the bottom of the silicone membrane (8) to bend downwards, and at the same time, the locking state between the positioning sleeve (3) and the limiting component (4) is released. The positioning sleeve (3) includes a positioning block (31), an inner half ring (32), a fixing block (33), and a telescopic column (34). The positioning block (31) has a semi-circular groove (311) on its inner side. The inner half ring (32) fits against the inner side of the positioning block (31). The fixing block (33) is installed on the surface of the positioning block (31). Both ends of the fixing block (33) have buffer grooves (331). The bottom of the telescopic column (34) fits against the surface of the silicone film (8), and the silicone film (8) is sealed against the inner wall of the positioning block (31) around its perimeter. In the limited position state, the top of the telescopic column (34) is higher than the top of the positioning block (31). The outer periphery of the inner half ring (32) is provided with an outer groove (322), and the outer periphery of the inner half ring (32) is provided with a circular hole (321) located inside the outer groove (322). The inner periphery of the inner half ring (32) is set as a conical surface (323). When the two positioning blocks (31) are attached, the outer groove (322) and the half ring groove (311) form a closed chamber, and the closed chamber is separated by a silicone membrane (8). The telescopic column (34) includes a thick rod (341), a first spring (342), a thin rod (343), and a clearance groove (344). The bottom of the thick rod (341) is attached to the silicone film (8), the thin rod (343) is connected to the top of the thick rod (341), the first spring (342) is connected between the top of the thick rod (341) and the positioning block (31), and the clearance groove (344) is opened on the outer periphery of the thin rod (343). The limiting component (4) includes a mounting block (41), a longitudinal groove (42), a mounting hole (43), a through rod (44), and a second spring (45). The two longitudinal grooves (42) are parallel and opened on the bottom surface of the mounting block (41). The fixing block (33) slides and fits in the longitudinal groove (42). The mounting hole (43) is rectangularly distributed and opened on the surface of the mounting block (41). The through rod (44) is installed in the longitudinal groove (42) and passes through the clearance groove (344) of the thin rod (343). The two second springs (45) are sleeved on the outer periphery of the through rod (44) and are respectively located in the two buffer grooves (331). The second springs (45) abut against the fixing block (33) and the mounting block (41).

2. The wheel speed sensor wiring harness assembly for electric vehicles according to claim 1, characterized in that: The curved sleeve (5) has a through hole (51) that coincides with the position of the round hole (321) on its surface. A memory metal wire (53) is provided on the inner side of the curved sleeve (5). The memory metal wire (53) is provided on the outer side of the wire body (52). A conical ring (54) is integrally formed at the end of the curved sleeve (5), and the conical ring (54) is sealed and fitted with the inner half ring (32) through the conical surface (323).

3. The wheel speed sensor wiring harness assembly for electric vehicles according to claim 1, characterized in that: The corrugated sleeve (6) includes a tapered connecting cylinder (61), a bellows (62) and a third spring (63). The tapered connecting cylinder (61) is connected between the end of the curved sleeve (5) and the bellows (62). The third spring (63) is disposed between the two tapered connecting cylinders (61).

4. The wheel speed sensor wiring harness assembly for electric vehicles according to claim 3, characterized in that: The third spring (63) is located outside the line body (52), and the outer periphery of the third spring (63) is not in contact with the bellows (62).

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