Wheel speed sensor wire harness assembly for electric automobile

Abstract

The invention relates to the technical field of electric automobile wire harnesses, in particular to a wheel speed sensor wire harness assembly for an electric automobile, which comprises a wire harness connector and a wheel speed sensor, and further comprises a linear sleeve, a positioning sleeve, a limiting assembly, curved sleeves, a corrugated sleeve and a silica gel film, the two sides of the corrugated sleeve are connected with the curved sleeves, and the ends of the curved sleeves are connected with the linear sleeve. The linear sleeve and the curve sleeve are arranged on the outer side of the line body to form an air bag structure, when the curve part is stretched during steering of the front wheel, the line body is twisted in a large-span mode, and the linear sleeve and the curve sleeve can further move relative to the limiting assembly through the positioning sleeve; the problems that when a vehicle turns, the connecting portions of the two ends of the wire harness assembly connected with the wheel speed sensor at the front wheels of the electric vehicle are damaged due to frequent stress torsion, the exposed area is large due to reserved redundancy, and the wire harness assembly is prone to being impacted by splashing gravel and damaged are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle wiring harnesses, in particular to a wheel speed sensor wiring harness assembly for an electric vehicle. Background Art

[0002] Electric vehicles (EVs) are a major type of new energy vehicle, powered by an onboard electrical system and driven by an electric motor. With the rapid development of EVs, the collection of wheel speed information is essential for implementing safety systems such as the ESP (Electric Stability Program) and the Anti-lock Braking System (ABS).

[0003] Wheel speed sensors are usually installed at the front wheel brake disc and rear wheel hub, and are connected to the vehicle power connector using a specially designed wheel speed sensor wiring harness assembly to provide power to the wheel speed sensors through the vehicle power supply.

[0004] The wiring harness assembly of the wheel speed sensor is usually fitted with the chassis suspension setting. Compared with the wheel speed sensor installed on the rear wheel, the wheel speed sensor installed on the front wheel and the wiring harness assembly connected to it will be constantly pulled when the electric vehicle turns. The wiring harness assembly connected between the power connector and the wheel speed sensor will be constantly pulled, which will cause the connection parts between the wiring harness and the sensor connector and the power connector to be easily twisted and damaged. At the same time, in order to avoid the wiring harness being broken when the front wheel turns, the wiring harness assembly connected to the wheel speed sensor of the front wheel of the electric vehicle needs to be set slightly longer, which will result in a larger exposed area of ​​the wiring harness assembly. When the electric vehicle is driving, it is easy to be hit by flying sand and gravel and other debris and cause damage, thereby resulting in a shorter life of the wiring harness assembly connected to the wheel speed sensor on the front wheel of the electric vehicle.

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

[0006] The object of the present invention is to provide a wheel speed sensor wiring harness assembly for electric vehicles. An airbag structure is formed by arranging a straight sleeve and a curved sleeve on the outside of the wire body. When the curved portion is stretched when the front wheel turns, the wire body is twisted over a large span. The straight sleeve and the curved sleeve can be further displaced relative to the limit assembly through the positioning sleeve. This solves the problem that the connection parts at both ends of the wiring harness assembly connected to the wheel speed sensor at the front wheel of the electric vehicle are damaged due to frequent force and twisting when the vehicle turns, and the problem that the exposed area is large due to reserved redundancy and is easily damaged by impact from flying sand and gravel. The invention has the effect of greatly extending the service life of the wiring harness assembly connected to the wheel speed sensor of the front wheel of the electric vehicle and ensuring the normal use of the wheel speed sensor.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A wheel speed sensor wiring harness assembly for an electric vehicle comprises a wiring harness connector and a wheel speed sensor, and further comprises a straight sleeve, a positioning sleeve, a limiting assembly, a curved sleeve, a corrugated sleeve and a silicone membrane, wherein curved sleeves are connected to both sides of the corrugated sleeve, 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 connection between the straight sleeve and the curved sleeve, the limiting assembly is installed on the surface of the positioning sleeve, the silicone membrane is attached to the inner side of the positioning sleeve, and a wire body connected between the wiring harness connector and the wheel speed sensor is provided inside the straight sleeve and the curved sleeve, the length of the wire body 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 is reduced, causing the bottom surface of the silicone membrane to bend downward, and at the same time releasing the locking state between the positioning sleeve and the limiting assembly.

[0009] Preferably, the positioning sleeve includes a positioning block, an inner semi-ring, a fixed block and a telescopic column, a semi-ring groove is provided on the inner side of the positioning block, the inner semi-ring is fitted on the inner side of the positioning block, the fixed block is installed on the surface of the positioning block, buffer grooves are provided at both ends of the fixed block, the bottom of the telescopic column is fitted with the surface of the silicone membrane, and the silicone membrane is sealed with the inner wall of the positioning block all around, and the top of the telescopic column is higher than the top of the positioning block in the limited state.

[0010] Preferably, an outer groove is provided on the outer periphery of the inner half ring, and a circular hole is provided on the outer periphery of the inner half ring located on the inner side of the outer groove. The inner periphery of the inner half ring is set as a conical surface. When the two positioning blocks are fitted together, the outer groove and the semi-ring groove form a closed chamber, and the closed chamber is separated by a silicone membrane.

[0011] Preferably, the telescopic column includes a thick rod, a first spring, a thin rod and an avoidance groove, the bottom of the thick rod is in contact with the silicone membrane, 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 avoidance groove is opened on the outer periphery of the thin rod.

[0012] Preferably, the limit assembly 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 and are opened on the bottom surface of the mounting block. The fixed block slides and fits in the longitudinal slide grooves. The mounting holes are rectangularly distributed and opened on the surface of the mounting block. The through rod is installed in the longitudinal slide groove, and the through rod passes through the avoidance groove of the thin rod. The two second springs are both sleeved on the outer circumference of the through rod, and the two second springs are respectively located in the two buffer grooves, and the second spring abuts between the fixed block and the mounting block.

[0013] Preferably, a through hole coinciding with the position of the circular hole is opened on the surface of the curved sleeve, a memory metal wire is arranged on the inside of the curved sleeve, and the memory metal wire is arranged on the outside of the wire body. A conical ring is integrally formed at the end of the curved sleeve, and the conical ring is sealed with the inner half ring through the conical surface.

[0014] Preferably, the bellows 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 arranged between the insides of the two tapered connecting cylinders.

[0015] Preferably, the third spring is located outside the wire body, and the outer periphery of the third spring does not fit the bellows.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the present invention is used for a wheel speed sensor located at the front wheel, the curved sleeve can reserve a large length for the displacement of the wheel speed sensor during steering, and convert the original torsion of the wire body at both ends into the overall torsion of the curved sleeve, which can greatly reduce the torsion amplitude of the internal wire body, thereby effectively avoiding the problem that the wire body in the wiring harness assembly at the front wheel brake disc is easily twisted and broken when the electric vehicle is steering. Moreover, the wire body can be quickly retracted after the steering is completed, thereby greatly reducing the exposed area of ​​the wiring harness assembly at the bottom of the vehicle, thereby effectively reducing the probability of damage by impact from flying sand and gravel, which is conducive to significantly extending the service life of the wiring harness assembly.

[0018] 2. By setting up the straight sleeve, curved sleeve, corrugated sleeve and positioning sleeve, under the cooperation of the above structures, a protective structure similar to an airbag can be formed on the outside of the wire body, and thus when it is inevitably hit by flying sand and gravel, it can also provide better protection for the internal wire body to avoid damage to the wire body, thereby greatly extending the service life of the wiring harness assembly.

[0019] 3. By setting the positioning sleeve, curved sleeve, limit assembly and corrugated sleeve, the curved sleeve and the corrugated sleeve are stretched in sequence when the front wheel turns sharply, and the sealing space on the side of the silicone membrane away from the fixed block increases, and then the pressure in the sealed space decreases. The silicone membrane drives the telescopic column to move downward and separates from the limit assembly. The positioning sleeve and the limit assembly can move relatively, further increasing the torsional span of the wire body between the positioning sleeves, thereby greatly reducing the torsional amplitude of the wire body, which is beneficial to reducing the probability of the wire body breaking due to force twisting, thereby effectively extending the service life of the wiring harness assembly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a structural schematic diagram of the positioning sleeve and the limiting assembly of the present invention;

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

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

[0024] Figure 5 Schematic diagram of the structure of the inner half ring of the present invention;

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

[0026] Figure 7 is a schematic cross-sectional view of the position limiting assembly of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the curve sleeve of the present invention;

[0028] Figure 9 It is a schematic diagram of the cross-sectional structure of the corrugated sleeve of the present invention.

[0029] In the figure: 1. Wire harness connector; 2. Straight sleeve; 3. Positioning sleeve; 31. Positioning block; 311. Semi-ring groove; 32. Inner semi-ring; 321. Round 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. Avoidance groove; 4. Limiting assembly; 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 wire; 54. Conical ring; 6. Corrugated sleeve; 61. Conical connecting cylinder; 62. Bellows; 63. Third spring; 7. Wheel speed sensor; 8. Silicone membrane. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1 to 9 The present invention provides a wheel speed sensor wiring harness assembly for electric vehicles, and the technical solution is as follows:

[0032] Reference Figure 1 、 Figure 2 and Figure 3, a wheel speed sensor wiring harness assembly for an electric vehicle, including a wiring harness connector 1 and a wheel speed sensor 7, the wiring harness connector 1 and the 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 position, and the wheel speed sensor 7 at the front wheel is installed near the brake disc position. It also includes a straight sleeve 2, a positioning sleeve 3, a limit assembly 4, a curve sleeve 5, a corrugated sleeve 6 and a silicone membrane 8. The straight sleeve 2 and the curve sleeve 5 are made of polyurethane material, have good elasticity, and are conveniently connected by hot melt to form a sealed space inside the straight sleeve 2, the curve sleeve 5 and the positioning sleeve 3. The curve sleeve 5 is connected to both sides of the corrugated sleeve 6, and the end connection method of the curve sleeve 5 and the corrugated sleeve 6 is hot melt connection. The sleeve 5 and the corrugated sleeve 6 are sealed by hot melt, and the ends of the curved sleeve 5 are connected to the straight sleeve 2. The connection method of the curved sleeve 5 and the straight sleeve 2 is hot melt connection, and a sealing structure is formed by hot melt. The ends of the two straight sleeves 2 are respectively connected to the wiring harness connector 1 and the wheel speed sensor 7. The ends of the straight sleeve 2 and the wiring harness connector 1 and the wheel speed sensor 7 are also hot melt sealed. 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 to be installed on the frame, but also reinforces the connection between the straight sleeve 2 and the curved sleeve 5, and is beneficial to improving 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. The limiting component 4 is installed on the vehicle frame by bolts. Under normal conditions, the positioning sleeve 3 and the limit component 4 will not be relatively displaced. Only when the front wheel turns sharply will the positioning sleeve 3 and the limit component 4 be relatively displaced. The silicone membrane 8 is fitted on the inner side of the positioning sleeve 3, and a sealed space is formed between the positioning sleeve 3 and the inner side of the curved sleeve 5. When the front wheel turns, the curved sleeve 5 is stretched first. When the steering amplitude is large, the corrugated sleeve 6 is also stretched. When the corrugated sleeve 6 and the curved sleeve 5 are stretched, there is a direct relationship between the internal incremental increase and the negative pressure value generated. The silicone membrane 8 divides the sealed space into two parts. The linear sleeve 2 and the curved sleeve 5 are both provided with a wire body 52 connected between the wiring harness connector 1 and the wheel speed sensor 7. The length of the wire body 52 located on the inner side of the corrugated sleeve 6 is the same as that of the corrugated sleeve 6. The maximum axial length of the corrugated sleeve 6 is equal. When the curved sleeve 5 is straightened, the wire body 52 on the inner side of the corrugated sleeve 6 is gradually expanded as the corrugated sleeve 6 is stretched to adapt to the length change between the two positioning sleeves 3. When the front wheel is turned, the curved sleeve 5 is first straightened, 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 is reduced, causing the bottom surface of the silicone membrane 8 to bend downward, and 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 wire body 52 on the inner side of the positioning sleeve 3 uses the spacing of the positioning sleeve 3 as the torsional span when twisting, so the torsional span is increased, thereby reducing the torsional angle of the wire body 52, thereby avoiding the wire body 52 from breaking due to a large torsional angle.

[0033] Reference Figure 3 and Figure 4 As an embodiment of the present invention, specifically, the positioning sleeve 3 includes a positioning block 31, an inner semi-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 being fitted together. A semi-annular groove 311 is provided on the inner side of the positioning block 31, and the inner semi-ring 32 is fitted on the inner side of the positioning block 31. The side wall of the positioning block 31 and the end of the inner semi-ring 32 are both provided with a sealing groove. When the two positioning blocks 31 and the two inner semi-rings 32 are fitted together, the sealing ring is placed in the sealing groove, and then Use bolts to install and fix the two positioning blocks 31. 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 outer periphery of the inner semi-ring 32 and the fitting part of the positioning block 31 to ensure the sealing between the positioning block 31 and the inner semi-ring 32. The fixed block 33 is installed on the surface of the positioning block 31. Buffer grooves 331 are provided at both ends of the fixed block 33. The bottom of the telescopic column 34 fits with the surface of the silicone membrane 8, and the silicone membrane 8 is sealed with the inner wall of the positioning block 31 all around. 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 As an embodiment of the present invention, specifically, an outer groove 322 is provided on the outer circumference of the inner semi-ring 32. After the inner semi-ring 32 is fitted with the positioning block 31, the outer groove 322 and the semi-ring groove 311 form a ring-shaped space between the positioning block 31 and the inner semi-ring 32. A circular hole 321 is provided on the outer circumference of the inner semi-ring 32, which is located inside the outer groove 322. The ring-shaped 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 volume of the internal space of the curved sleeve 5 and the corrugated sleeve 6 increases, thereby reducing the pressure. At this time, the gas in the ring-shaped space is discharged through the circular hole 321. It is drawn into the curved sleeve 5, whereby the pressure in the annular space is also reduced, and the pressure in the space on the other side of the silicone membrane 8 remains unchanged, so that the silicone membrane 8 bends and deforms toward the side away from the positioning block 31, thereby driving the telescopic column 34 to move toward the side away from the fixed block 33. After the telescopic column 34 moves, it separates from the limit assembly 4, thereby releasing the limiting effect of the positioning sleeve 3 and the limit assembly 4, and then the fixed block 33 can slide relative to the limit assembly 4. The inner periphery of the inner semi-ring 32 is set to a conical surface 323. When the two positioning blocks 31 are fitted together, the outer groove 322 and the semi-annular groove 311 form a closed chamber, and the closed chamber is separated by the silicone membrane 8.

[0035] Reference Figure 6As an embodiment of the present invention, specifically, the telescopic column 34 includes a thick rod 341, a first spring 342, a thin rod 343 and an avoidance groove 344. The bottom of the thick rod 341 is in contact with the silicone membrane 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 downward, 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 avoidance groove 344 is opened on the outer periphery of the thin rod 343, and the top of the thin rod 343 is opened with anti-slip grooves. When the top of the thin rod 343 contacts the limit assembly 4, the stability between the thin rod 343 and the positioning assembly can be ensured.

[0036] Reference Figure 4 and Figure 7 As an embodiment of the present invention, specifically, the limiting assembly 4 includes a mounting block 41, a longitudinal slide groove 42, a mounting hole 43, a through rod 44 and a second spring 45. The two longitudinal slide grooves 42 are arranged in parallel and are opened on the bottom surface of the mounting block 41. A circular groove is opened 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 limiting the thin rod 343 and the mounting block 41 laterally. The design purpose of the two longitudinal slide grooves 42 is to correspond to the fixing blocks 33 at the tops of the two positioning blocks 31. The fixing blocks 33 slide and fit in the longitudinal slide grooves 42. The mounting holes 43 are rectangularly distributed and opened on the surface of the mounting block 41. The design of the mounting holes 43 is to facilitate fixing the mounting block 41 to a suitable position on the chassis of the electric vehicle. The through rod 44 is installed in the longitudinal slide groove 42, and the through rod 44 passes through the thin rod 34 3, the two second springs 45 are both sleeved on the outer circumference of the through rod 44, and the two second springs 45 are respectively located in the two buffer grooves 331, and the second springs 45 abut between the fixed block 33 and the mounting block 41. When the thin rod 343 moves downward, under the action of the avoidance groove 344, the moving trajectory of the thin rod 343 will not interfere with the through rod 44. After the thin rod 343 moves downward, 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 corresponding side of the fixed block 33 is displaced, the second spring 45 on that side is squeezed accordingly and the second spring 45 on the other side is stretched. 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 inside the mounting block 41.

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

[0038] Reference Figure 9 As an embodiment of the present invention, specifically, the bellows 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 their elastic amplitude is limited, so that when the front wheel turns, the curved sleeve 5 is preferentially transformed into a straight shape. The third spring 63 is arranged between the insides of the two tapered connecting cylinders 61, the third spring 63 is located outside the linear body 52, and the outer periphery of the third spring 63 is not in contact with the bellows 62.

[0039] Working principle: First, fix the limiting component 4 under the cantilever of the electric vehicle chassis, and install the wheel speed sensor 7 and the wiring harness connector 1 in the corresponding positions in turn. The wheel speed sensor 7 is close to the brake disc, and the wiring harness connector 1 is plugged and fixed to the power connector. When the front wheel is turned, since the positioning sleeve 3 is limitedly connected to the limiting component 4, the two straight sleeves 2 will not be displaced when turning, so the two curved sleeves 5 will be stretched at the same time to adapt to the displacement change caused by the angle change of the brake disc. In the process of the curved sleeve 5 being gradually stretched, the corrugated sleeve 6 is also gradually stretched, and the volume of the sealed space on the side of the silicone membrane 8 away from the positioning block 31 increases, and the corresponding pressure decreases, and then the silicone membrane 8 drives the positioning column to move to the side away from the positioning block 31. After the end of the positioning column is separated from the limiting component 4, the positioning sleeve 3 and the limiting component 4 can further undergo relative displacement, thereby further increasing the torsional span of the wire body 52 between the positioning sleeves 3 and correspondingly reducing the torsional angle of the wire body 52 between the positioning sleeves 3 to avoid the wire body 52 from being twisted at a large angle and easily breaking.

[0040] Specifically, when the curved sleeve 5 is gradually stretched, the memory wire 53 is stretched first, and the wire body 52 located on the inner side of the corrugated sleeve 6 gradually expands to adapt to the stretching changes of the curved sleeve 5. When 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 tube 61, the bellows 62, the curved sleeve 5 and the positioning sleeve 3 increases. Under the action of the silicone membrane 8, the sealed space is divided into two parts, and the volume of the part of the silicone membrane 8 close to the positioning block 31 does not increase. Therefore, the pressure on the other side of the sealed space decreases due to the increase in volume, and some air inside the part of the silicone membrane 8 away from the positioning block 31 is drawn into the curved sleeve 5. When the second spring 45 is stretched, the top of the thin rod 343 is separated from the mounting block 41, and the positioning block 31 can slide along the longitudinal slot 42. Subsequently, the positioning block 31 moves along the longitudinal slot 42 toward 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 and the third spring 63, as well as the silicone membrane 8 and the memory wire 53, the curved sleeve 5, the positioning sleeve 3 and the telescopic column 34 are reset, and the top of the thin rod 343 contacts the mounting block 41 to prevent the positioning sleeve 3 from moving at will.

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

Claims

1. A wheel speed sensor wiring harness assembly for an electric vehicle, comprising a wiring harness connector (1) and a wheel speed sensor (7), characterized in that: The invention also includes a straight sleeve (2), a positioning sleeve (3), a limiting assembly (4), a curved sleeve (5), a corrugated sleeve (6) and a silicone membrane (8), wherein both sides of the corrugated sleeve (6) are connected to the curved sleeve (5), the ends of the curved sleeve (5) are connected to the straight sleeve (2), the ends of the two straight sleeves (2) are respectively connected to the harness connector (1) and the wheel speed sensor (7), the positioning sleeve (3) is installed at the connection between the straight sleeve (2) and the curved sleeve (5), the limiting assembly (4) is installed on the surface of the positioning sleeve (3), and the silicone membrane (8) is attached to the positioning sleeve (3). ) inside, the linear sleeve (2) and the curved sleeve (5) are both provided with a wire body (52) connected between the wiring harness connector (1) and the wheel speed sensor (7), the length of the wire body (52) located 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 first straightened, and the corrugated sleeve (6) is gradually stretched along with the curved sleeve (5), and when the corrugated sleeve (6) is stretched, the internal air pressure is reduced so that the bottom surface of the silicone membrane (8) bends downward, and at the same time, the locking state between the positioning sleeve (3) and the limit assembly (4) is released.

2. The wheel speed sensor wiring harness assembly for electric vehicles according to claim 1, characterized in that: The positioning sleeve (3) comprises a positioning block (31), an inner semi-ring (32), a fixed block (33) and a telescopic column (34); a semi-ring groove (311) is provided on the inner side of the positioning block (31); the inner semi-ring (32) is fitted on the inner side of the positioning block (31); the fixed block (33) is mounted on the surface of the positioning block (31); buffer grooves (331) are provided at both ends of the fixed block (33); the bottom of the telescopic column (34) is fitted on the surface of the silicone membrane (8), and the silicone membrane (8) is sealed and fitted around the inner wall of the positioning block (31); and the top of the telescopic column (34) is higher than the top of the positioning block (31) in the limited state.

3. The wheel speed sensor wiring harness assembly for an electric vehicle according to claim 2, characterized in that: An outer groove (322) is provided on the outer periphery of the inner semi-ring (32), and a circular hole (321) is provided on the outer periphery of the inner semi-ring (32) and is located inside the outer groove (322). The inner periphery of the inner semi-ring (32) is provided with a conical surface (323). When the two positioning blocks (31) are fitted together, the outer groove (322) and the semi-ring groove (311) form a closed chamber, and the closed chamber is separated by a silicone membrane (8).

4. The wheel speed sensor wiring harness assembly for an electric vehicle according to claim 3, characterized in that: The telescopic column (34) comprises a thick rod (341), a first spring (342), a thin rod (343) and an avoidance groove (344); the bottom of the thick rod (341) is in contact with the silicone membrane (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 avoidance groove (344) is provided on the outer periphery of the thin rod (343).

5. The wheel speed sensor wiring harness assembly for an electric vehicle according to claim 4, characterized in that: The limiting assembly (4) includes a mounting block (41), a longitudinal slide groove (42), a mounting hole (43), a through rod (44) and a second spring (45). The two longitudinal slide grooves (42) are arranged in parallel and are opened on the bottom surface of the mounting block (41). The fixed block (33) slides in the longitudinal slide groove (42). The mounting holes (43) are rectangularly distributed and opened on the surface of the mounting block (41). The through rod (44) is installed in the longitudinal slide groove (42), and the through rod (44) passes through the avoidance groove (344) of the thin rod (343). The two second springs (45) are both sleeved on the outer periphery of the through rod (44), and the two second springs (45) are respectively located in the two buffer grooves (331). The second spring (45) abuts between the fixed block (33) and the mounting block (41).

6. The wheel speed sensor wiring harness assembly for an electric vehicle according to claim 3, characterized in that: The surface of the curved sleeve (5) is provided with a through hole (51) which coincides with the position of the circular hole (321); the inner side of the curved sleeve (5) is provided with a memory metal wire (53); the memory metal wire (53) is provided on the outer side of the linear 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).

7. The wheel speed sensor wiring harness assembly for an electric vehicle according to claim 1, characterized in that: The bellows sleeve (6) comprises 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 arranged between the insides of the two tapered connecting cylinders (61).

8. The wheel speed sensor wiring harness assembly for an electric vehicle according to claim 7, characterized in that: The third spring (63) is located outside the wire body (52), and the outer periphery of the third spring (63) does not fit the bellows (62).

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