Wire harness fixing device of electric automobile

Abstract

The invention discloses a wire harness fixing device of an electric automobile, and relates to the technical field of wire harness fixing of the electric automobile, the wire harness fixing device comprises a mounting frame and a plurality of driving rings rotationally connected in the mounting frame, each driving ring is provided with two symmetrical guide notches, and a driving rod is slidably connected in each guide notch; the bottom of the driving rod is connected with a connecting plate; according to the invention, the wire harness is fixed through the independent limiting ring, and when a certain cable breaks down, the faulty cable can be taken out only by operating the corresponding driving ring to loosen the limiting ring, and other parts do not need to be disassembled. Therefore, the maintenance time is greatly shortened, accidental damage to a normal cable is avoided, the maintenance cost is effectively reduced, and a plurality of driving rings are synchronously driven to rotate through meshing of a transmission rack and a driving gear, so that a plurality of limiting rings can synchronously act. And the wire harness can be integrally fixed or loosened more conveniently and efficiently, and the efficiency of wire harness assembly is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle wire harness fixing, and specifically to a wire harness fixing device for electric vehicles. Background Art

[0002] A high-voltage wire harness is required to connect the power source and electrical appliances of new energy vehicles, and the high-voltage wire harness generally consists of multiple cables. The high-voltage wire harness is thick and hard, making assembly relatively difficult, and the cables are extremely prone to twisting during the assembly process because there are few fixed positions, so a wire harness fixing device needs to be installed.

[0003] The existing Chinese patent (Publication No.: CN214044816U) discloses a fixing device for preventing wear of high-voltage wire harnesses of electric vehicles, including: a rubber elastomer restraint structure and a pressing structure; the rubber elastomer restraint structure is an integrated movable structure with one end closed and the other end open, and a preset number of circular channels are arranged inside the rubber elastomer restraint structure, and the diameter of the circular channels is equal to the diameter of the high-voltage wire harness to be fixed; a strip-shaped groove is arranged on the outer side of the movable structure of the rubber elastomer restraint structure, the pressing structure is installed in the strip-shaped groove, and both ends extend out of the rubber elastomer restraint structure for fixing. It causes less damage to the wire harness, improves the reliability and safety of the wire harness fixing device, and at the same time improves the convenience of wire harness installation.

[0004] During the process of fixing the wire harness by the above fixing device, the wire harness is placed in the restraint mechanism, and then the pressing mechanism is compacted on the restraint mechanism, and then the restraint mechanism and the pressing mechanism are fixedly connected to each other by using the set bolts, so as to achieve the effect of fixing the wire harness. However, during the fixing process, since it fixes multiple cables at the same time, when one of the cables fails, it is often necessary to disassemble the entire pressing mechanism before the faulty cable can be removed. This process is relatively cumbersome and may also cause accidental damage to other normal cables during the disassembly process, further increasing the maintenance cost and vehicle downtime. In addition, in actual use, with the vibration and bump of the vehicle during driving, this fixing method may gradually become loose, affecting the fixing effect of the wire harness. Summary of the Invention

[0005] The purpose of the present invention is to provide a wire harness fixing device for electric vehicles to solve the problems raised in the above background art.

[0006] To solve the above technical problems, a wire harness fixing device for an electric vehicle provided by the present invention includes an installation frame, which includes a plurality of driving rings rotatably connected inside the installation frame. Two symmetrically arranged guiding notches are formed on the driving ring. A driving rod is slidably connected in the guiding notch. A connecting plate is connected to the bottom of the driving rod. One end of the connecting plate is connected with a limiting ring for fixing the wire harness. A synchronous driving member for driving a plurality of driving rings to rotate synchronously is arranged on one side of the driving ring.

[0007] Further, the synchronous driving member includes a driving gear arranged on the outer side of the driving ring, and a transmission rack is meshed and connected to one side of the driving gear.

[0008] Further, a plurality of fixing blocks are connected inside the driving gear, and the plurality of fixing blocks are equally spaced along the inner circumference direction of the driving gear. A fixing frame is connected to the outer surface of the driving ring. An electromagnet is connected inside the fixing frame. A first return spring is connected to one side of the electromagnet. The other end of the first return spring is connected with a plugging block. The plugging block is slidably connected inside the fixing frame, and one end of the plugging block extends to the outside of the fixing frame and is plugged between two fixing blocks.

[0009] Further, a transmission lead screw is rotatably connected inside the installation frame. A nut is threadedly connected to the transmission lead screw. The top of the nut is connected to the bottom of the transmission rack.

[0010] Further, two first mounting plates are arranged on both the upper and lower sides of the installation frame. A connecting rod is connected between the two first mounting plates. A slider is slidably connected to the connecting rod. A transmission plate is rotatably connected to the slider. The other end of the transmission plate is rotatably connected to the installation frame. A first buffer spring is sleeved on the connecting rod. One end of the first buffer spring is connected to the first mounting plate, and the other end is connected to the slider.

[0011] Further, a connecting frame is connected to the connecting rod. Two symmetrically arranged sliding plates are slidably connected inside the connecting frame. Mounting rods are connected to the opposite sides of the two sliding plates. The other ends of the mounting rods are connected to the slider. A damper is connected to one side of the sliding plate. The other end of the damper is connected to the inner wall of the connecting frame. A second buffer spring is sleeved on the damper.

[0012] Further, a buffer air bag is connected to the top of the connecting frame. An exhaust port is formed inside the connecting frame. The exhaust port is communicated with the air inlet at the bottom of the buffer air bag.

[0013] Further, a plurality of second return springs are connected between the two sliding plates, and the plurality of second return springs are linearly arrayed along the height direction of the sliding plates.

[0014] Further, a cross plate is connected inside the installation frame. The connecting plate is slidably connected to the cross plate. One side of the driving ring and the driving gear is connected with a first guiding rod, and the first guiding rod is slidably connected to the cross plate.

[0015] Further, a second guiding rod is connected inside the installation frame. The nut is slidably connected to the second guiding rod, and a guiding opening adapted to the second guiding rod is formed on the nut.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The wire harness is fixed by an independent limiting ring. When a certain cable fails, only the corresponding driving ring needs to be operated to loosen the limiting ring, and the faulty cable can be taken out without disassembling other parts. This greatly reduces the maintenance time, avoids accidental damage to normal cables, and effectively reduces the maintenance cost.

[0017] 2. The meshing of the transmission rack and the driving gear is used to synchronously drive the rotation of multiple driving rings, so that multiple limiting rings can act synchronously. When fixing or loosening the wire harness as a whole, it is more convenient and efficient, and significantly improves the efficiency of wire harness assembly.

[0018] 3. With the help of structures such as an electromagnet, a first return spring, and a plugging block, by controlling the on-off of the electromagnet, the synchronous rotation or individual rotation state of the driving ring can be flexibly switched. During normal use, synchronous fixation is ensured, and during maintenance, the corresponding driving ring can be quickly separated from the synchronous drive, which is convenient for operation.

[0019] 4. Structures such as a first buffer spring, a damper, a second buffer spring, and a buffer airbag are provided to form a multi-stage buffer mechanism. When the vehicle is driving and is affected by vibration and bump, it can effectively absorb the vibration energy, reduce the influence of vibration on the device, maintain the stability of the wire harness fixation, and extend the service life of the device and the wire harness.

[0020] 5. The cross plate cooperates with the first guiding rod to provide support and guidance for the movement of the connecting plate, the driving ring, and the driving gear, and the second guiding rod guides the movement of the nut on the transmission screw rod. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the side view of the present invention; Figure 3 is the rear view of the present invention; Figure 4 is the structural schematic diagram of the connection between the guiding rod and the driving ring in the present invention; Figure 5 is the present invention Figure 1 the enlarged view of the structure at A in; Figure 6For the present invention Figure 1 The enlarged view of the structure at position B in the present invention; Figure 7 For the present invention Figure 1 The enlarged view of the structure at position C in the present invention.

[0022] In the figure: 1. Installation frame; 201. Driving ring; 202. Guide slot; 203. Driving rod; 204. Connecting plate; 205. Limiting ring; 301. Driving gear; 302. Transmission rack; 303. Fixed block; 304. Fixed frame; 305. Electromagnet; 306. First return spring; 307. Insertion block; 401. Transmission lead screw; 402. Nut; 501. First mounting plate; 502. Connecting rod; 503. Slide block; 504. Transmission plate; 505. First buffer spring; 601. Connecting frame; 602. Slide plate; 603. Mounting rod; 604. Buffer airbag; 605. Damper; 606. Second buffer spring; 7. Second return spring; 8. First guide rod; 9. Second guide rod; 10. Second mounting plate. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1-7 , the present invention provides a technical solution: a wire harness fixing device for an electric vehicle, including an installation frame 1, including a plurality of driving rings 201 rotatably connected in the installation frame 1, two symmetrically arranged guide slots 202 are opened on the driving ring 201, a driving rod 203 is slidably connected in the guide slot 202, the bottom of the driving rod 203 is connected with a connecting plate 204, one end of the connecting plate 204 is connected with a limiting ring 205 for fixing the wire harness, and a synchronous driving member for driving a plurality of driving rings 201 to rotate synchronously is arranged on one side of the driving ring 201.

[0025] During specific implementation, the wire harness is placed inside the limiting ring 205, and a synchronous driving member can drive multiple driving rings 201 to rotate synchronously. When the driving ring 201 rotates, the guiding slot 202 drives the driving rod 203 to move, and the driving rod 203 drives the connecting plate 204, thereby enabling the limiting ring 205 to fix or release the wire harness. Since each driving ring 201 controls its corresponding limiting ring 205 relatively independently, a certain wire harness can be operated individually, and the wire harness is fixed by the independent limiting ring 205. When a certain cable fails, only the corresponding driving ring 201 needs to be operated to release the limiting ring 205, facilitating the removal of the faulty cable without the need to disassemble other parts, reducing the repair time and accidental damage to normal cables, and lowering the repair cost.

[0026] Please refer to Figure 1-7 , the synchronous driving member includes a driving gear 301 arranged outside the driving ring 201, and a transmission rack 302 is meshed and connected to one side of the driving gear 301.

[0027] During specific implementation, when the transmission rack 302 moves, it meshes with the driving gear 301, thereby driving the driving gear 301 to rotate. The driving gear 301 is connected to the driving ring 201, and further realizes the synchronous rotation of multiple driving rings 201. This method of synchronously driving multiple driving rings 201 ensures that multiple limiting rings 205 can act synchronously, making it more convenient and efficient to fix or release the wire harness as a whole, and improving the efficiency of wire harness assembly.

[0028] Please refer to Figure 1-7 , a plurality of fixing blocks 303 are connected inside the driving gear 301, and the plurality of fixing blocks 303 are evenly distributed along the inner circumference direction of the driving gear 301. A fixing frame 304 is connected to the outer surface of the driving ring 201, an electromagnet 305 is connected inside the fixing frame 304, a first return spring 306 is connected to one side of the electromagnet 305, the other end of the first return spring 306 is connected to a plugging block 307, the plugging block 307 is slidably connected inside the fixing frame 304, and one end of the plugging block 307 extends outside the fixing frame 304 and is plugged between two fixing blocks 303.

[0029] During specific implementation, when the electromagnet 305 is energized, it generates a magnetic force to attract the plug-in block 307, causing it to move towards the electromagnet 305 against the elastic force of the first return spring 306, thereby disengaging from between the two fixed blocks 303. At this time, the driving gear 301 and the driving ring 201 can rotate relative to each other, and the driving ring 201 can be operated independently. When the electromagnet 305 is de-energized, the first return spring 306 pushes the plug-in block 307 to insert between the two fixed blocks 303, and the driving gear 301 and the driving ring 201 are fixedly connected and can rotate synchronously with the synchronous driving member. By controlling the energization and de-energization of the electromagnet 305, the synchronous rotation or independent rotation state of the driving ring 201 can be flexibly switched. When a certain cable needs to be repaired, the corresponding driving ring 201 can be quickly separated from the synchronous drive, which is convenient for operation, and at the same time, synchronous fixation can be ensured during normal use.

[0030] Please refer to Figure 1-7 , a transmission lead screw 401 is rotatably connected in the installation frame 1, and a nut 402 is threadedly connected to the transmission lead screw 401. The top of the nut 402 is connected to the bottom of the transmission rack 302.

[0031] During specific implementation, when the transmission lead screw 401 is rotated, the nut 402 will move axially on the transmission lead screw 401. Since the nut 402 is connected to the transmission rack 302, the transmission rack 302 is driven to move, realizing the rotation of the driving gear 301 and the driving ring 201.

[0032] Please refer to Figure 1-7 , two first mounting plates 501 are provided on both the upper and lower sides of the installation frame 1. A connecting rod 502 is connected between the two first mounting plates 501. A slider 503 is slidably connected to the connecting rod 502. A transmission plate 504 is rotatably connected to the slider 503. The other end of the transmission plate 504 is rotatably connected to the installation frame 1. A first buffer spring 505 is sleeved on the connecting rod 502. One end of the first buffer spring 505 is connected to the first mounting plate 501, and the other end is connected to the slider 503.

[0033] It should be noted that the bottom of the first mounting plate 501 is connected to a second mounting plate 10, and at least four screws are threadedly connected to the second mounting plate 10.

[0034] During specific implementation, when the device is subjected to vibration and jolting, the installation frame 1 will displace, driving the transmission plate 504 to rotate, causing the slider 503 to slide on the connecting rod 502. The first buffer spring 505 will compress or stretch, absorbing the vibration energy and playing a buffering role. This setting can effectively reduce the impact of vibration on the device through the cooperation of the first buffer spring 505 and related structures, maintaining the stability of the wire harness fixation.

[0035] Please refer to Figure 1-7, a connecting frame 601 is connected to the connecting rod 502. Two symmetrically arranged sliding plates 602 are slidably connected inside the connecting frame 601. Installation rods 603 are connected to the opposite sides of the two sliding plates 602. The other ends of the installation rods 603 are connected to the slider 503. One side of the sliding plate 602 is connected to a damper 605. The other end of the damper 605 is connected to the inner wall of the connecting frame 601. A second buffer spring 606 is sleeved on the damper 605.

[0036] During specific implementation, when the slider 503 moves, it will drive the sliding plate 602 to slide inside the connecting frame 601 through the installation rod 603. The damper 605 will generate a damping force to slow down the sliding speed of the sliding plate 602. The second buffer spring 606 will also absorb part of the vibration energy, further enhancing the buffering effect. The damper 605 can consume the vibration energy and reduce the transmission of vibration. Cooperating with the second buffer spring 606, it can better cope with vibrations of different frequencies and intensities and ensure the stability of the wire harness fixing device.

[0037] Please refer to Figure 1-7 , a buffer airbag 604 is connected to the top of the connecting frame 601. An exhaust port is opened inside the connecting frame 601, and the exhaust port is communicated with the air inlet at the bottom of the buffer airbag 604.

[0038] During specific implementation, when the sliding plate 602 slides, it will compress the air inside the connecting frame 601. The air enters the buffer airbag 604 through the exhaust port, causing it to expand and further absorb the vibration energy. When the vibration decreases, the air inside the buffer airbag 604 flows back through the exhaust port and returns to its original state. This setting enables the buffer airbag 604 to absorb vibrations with relatively large energy, forming a multi-stage buffer and more effectively reducing the impact of vibrations on the device and the wire harness.

[0039] Please refer to Figure 1-7 , a plurality of second return springs 7 are connected between the two sliding plates 602, and the plurality of second return springs 7 are linearly arrayed along the height direction of the sliding plate 602.

[0040] During specific implementation, a plurality of second return springs 7 are connected between the two sliding plates 602, and the plurality of second return springs 7 are linearly arrayed along the height direction of the sliding plate 602.

[0041] Please refer to Figure 1-7 , a cross plate is connected inside the installation frame 1. The connecting plate 204 is slidably connected to the cross plate. First guide rods 8 are connected to one side of the driving ring 201 and the driving gear 301, and the first guide rods 8 are slidably connected to the cross plate.

[0042] During specific implementation, the horizontal plate provides support and guidance for the movement of the connecting plate 204, the driving ring 201, and the driving gear 301. The first guide rod 8 is inserted into the horizontal plate to ensure that the driving ring 201 and the driving gear 301 do not shift during rotation and movement, making the movement smoother.

[0043] Please refer to Figure 1-7 , a second guide rod 9 is connected inside the mounting frame 1, and the nut 402 is slidably connected to the second guide rod 9. A guide opening adapted to the second guide rod 9 is provided on the nut 402.

[0044] During specific implementation, the second guide rod 9 is inserted into the guide opening of the nut 402 to provide guidance for the movement of the nut 402 on the transmission lead screw 401, preventing the nut 402 from rotating or shifting during movement and ensuring the smooth movement of the transmission rack 302.

[0045] Working principle: The wiring harness of the electric vehicle is correspondingly placed in each limiting ring 205 to prepare for subsequent fixing operations. At this time, all components are in the initial state, and the limiting ring 205 does not fasten the wiring harness.

[0046] Rotate the transmission lead screw 401. Since the nut 402 is threadedly connected to the transmission lead screw 401, the nut 402 will move axially along the transmission lead screw 401 under the action of the thread. Also, because the top of the nut 402 is connected to the bottom of the transmission rack 302, the movement of the nut 402 drives the transmission rack 302 to translate inside the mounting frame 1.

[0047] During the movement of the transmission rack 302, it meshes with the driving gear 301. The driving gear 301 is installed outside the driving ring 201 and starts to rotate under the push of the transmission rack 302. In the normal working state, the electromagnet 305 is powered off, and the first return spring 306 pushes the insertion block 307 to insert between the two fixing blocks 303 inside the driving gear 301, making the driving gear 301 fixedly connected to the driving ring 201. In this way, multiple driving rings 201 will rotate synchronously under the drive of the driving gear 301.

[0048] When the driving ring 201 rotates, two symmetrically arranged guiding notches 202 on it will drive the driving rod 203 which is slidably connected thereto to move. The connecting plate 204 connected to the bottom of the driving rod 203 moves accordingly, and further enables the limiting ring 205 connected to one end of the connecting plate 204 to tighten the wire harness, thereby realizing the fixation of the wire harness. During this process, the cross plate connected inside the mounting frame 1 provides support for the movement of the connecting plate 204, the driving ring 201 and the driving gear 301. The first guiding rods 8 connected to one side of the driving ring 201 and the driving gear 301 are slidably connected to the cross plate, ensuring that the driving ring 201 and the driving gear 301 will not shift during rotation and movement, making the whole movement smoother, and ensuring that the limiting ring 205 can accurately and stably fix the wire harness.

[0049] When a certain wire harness fails and needs to be repaired, the electromagnet 305 in the fixed frame 304 on the outer side of the corresponding driving ring 201 is energized. The electromagnet 305 generates a magnetic force, attracting the plugging block 307 to move towards the electromagnet 305 against the elastic force of the first return spring 306. The plugging block 307 disengages from between the two fixing blocks 303 in the driving gear 301. At this time, the driving gear 301 and the driving ring 201 can rotate relative to each other, and the driving ring 201 is separated from the synchronous drive and is no longer affected by the synchronous rotation of the transmission rack 302 and the driving gear 301.

[0050] Manually rotate the driving ring 201. The guiding notch 202 on the driving ring 201 drives the driving rod 203 to move. The driving rod 203 drives the connecting plate 204, and further enables the limiting ring 205 to loosen. The maintenance personnel can easily take out the faulty cable for repair without having to disassemble the fixing structures of other normal wire harnesses, greatly improving the convenience of repair and reducing the repair time and accidental damage to the normal cables.

[0051] During the driving process of the vehicle, the device will be subjected to vibrations and bumps, and the mounting frame 1 will displace accordingly. The displacement of the mounting frame 1 drives the transmission plate 504 to rotate. The rotation of the transmission plate 504 causes the slider 503 to slide on the connecting rod 502. One end of the first buffer spring 505 sleeved on the connecting rod 502 is connected to the first mounting plate 501, and the other end is connected to the slider 503. When the slider 503 slides, the first buffer spring 505 will compress or elongate according to the vibration direction, absorbing part of the vibration energy and initially playing a buffering role to reduce the impact of vibrations on the mounting frame 1 and the internal wire harness fixing structure.

[0052] The slider 503 moves through the mounting rod 603 to drive the slide plate 602 to slide within the connection frame 601. The other end of the damper 605 connected to one side of the slide plate 602 is connected to the inner wall of the connection frame 601. When the slide plate 602 slides, the damper 605 generates a damping force to slow down the sliding speed of the slide plate 602 and consume the vibration energy. At the same time, the second buffer spring 606 sleeved on the damper 605 also absorbs part of the vibration energy. Through the synergistic effect of the damper 605 and the second buffer spring 606, the buffering effect is further enhanced, the vibration transmission is reduced, and different frequencies and intensities of vibration can be better coped with, ensuring the stability of the wire harness fixing device in a vibrating environment.

[0053] When the slide plate 602 slides within the connection frame 601, it will compress the air inside the connection frame 601. An exhaust port is provided inside the connection frame 601, and the exhaust port is in communication with the air inlet at the bottom of the buffer airbag 604. The compressed air enters the buffer airbag 604 through the exhaust port, causing it to expand and further absorb vibrations with greater energy. When the vibration decreases, the air inside the buffer airbag 604 flows back through the exhaust port to return to its original state. The buffer airbag 604, the first buffer spring 505, the damper 605, and the second buffer spring 606 form a multi-stage buffer system, which more effectively reduces the impact of vibration on the device and the wire harness.

[0054] A plurality of second return springs 7 are connected between the two slide plates 602 and are linearly arrayed along the height direction of the slide plate 602. When the slide plate 602 moves, the second return springs 7 provide a restoring force to assist in absorbing the vibration energy and help the slide plate 602 return to its initial position, further maintaining the stability of the buffer structure, ensuring the continuous and effective operation of the entire buffer mechanism, and guaranteeing the stable operation of the wire harness fixing device during vehicle driving.

Claims

1. A wiring harness fixing device for an electric vehicle, comprising a mounting frame (1), characterized in that: The invention comprises a plurality of drive rings (201) rotatably connected in a mounting frame (1), the drive ring (201) being provided with two mutually symmetrical guide slots (202), a drive rod (203) being slidably connected in the guide slot (202), a connecting plate (204) being connected to the bottom of the drive rod (203), a limiting ring (205) for fixing a wiring harness being connected to one end of the connecting plate (204), and a synchronous driving member for driving the plurality of drive rings (201) to rotate synchronously being provided on one side of the drive ring (201).

2. A wiring harness fixing device for an electric vehicle as claimed in claim 1, characterized in that: The synchronous driving member comprises a driving gear (301) arranged outside the driving ring (201), and one side of the driving gear (301) is meshingly connected with a transmission rack (302).

3. A wiring harness fixing device for an electric vehicle as claimed in claim 2, characterized in that: A plurality of fixed blocks (303) are connected inside the driving gear (301), and the plurality of fixed blocks (303) are distributed at equal intervals along the inner circumference direction of the driving gear (301); a fixed frame (304) is connected to the outer surface of the driving ring (201), an electromagnet (305) is connected inside the fixed frame (304), one side of the electromagnet (305) is connected to a first return spring (306), and the other end of the first return spring (306) is connected to a plug-in block (307), the plug-in block (307) is slidably connected inside the fixed frame (304), and one end of the plug-in block (307) extends to the outside of the fixed frame (304) and is plugged between two fixed blocks (303).

4. A wiring harness fixing device for an electric vehicle as claimed in claim 2, characterized in that: A transmission screw (401) is rotatably connected inside the installation frame (1), a nut (402) is threadedly connected to the transmission screw (401), and the top of the nut (402) is connected to the bottom of the transmission rack (302).

5. The wiring harness fixing device for an electric vehicle as claimed in claim 1, characterized in that: Two first mounting plates (501) are arranged on both upper and lower sides of the mounting frame (1); a connecting rod (502) is connected between the two first mounting plates (501); a slider (503) is slidably connected to the connecting rod (502); a transmission plate (504) is rotatably connected to the slider (503); the other end of the transmission plate (504) is rotatably connected to the mounting frame (1); a first buffer spring (505) is sleeved on the connecting rod (502); one end of the first buffer spring (505) is connected to the first mounting plate (501), and the other end is connected to the slider (503).

6. A wiring harness fixing device for an electric vehicle as claimed in claim 5, characterized in that: The connecting rod (502) is connected to a connecting frame (601), and two symmetrical slide plates (602) are slidably connected in the connecting frame (601), and the two slide plates (602) are connected to mounting rods (603) on opposite sides, and the other end of the mounting rod (603) is connected to the sliding block (503). One side of the sliding block (602) is connected to a damper (605), and the other end of the damper (605) is connected to the inner wall of the connecting frame (601), and a second buffer spring (606) is sleeved on the damper (605).

7. A wiring harness fixing device for an electric vehicle as claimed in claim 6, characterized in that: The top of the connection frame (601) is connected to a cushioning airbag (604), and an exhaust port is provided in the connection frame (601), wherein the exhaust port is in communication with an air inlet at the bottom of the cushioning airbag (604).

8. A wiring harness fixing device for an electric vehicle as claimed in claim 6, characterized in that: A plurality of second return springs (7) are connected between the two slide plates (602), and the plurality of second return springs (7) are distributed in a linear array along the height direction of the slide plates (602).

9. A wiring harness fixing device for an electric vehicle as claimed in claim 2, characterized in that: A transverse plate is connected inside the installation frame (1), the connecting plate (204) is slidably connected to the transverse plate, and one side of each of the driving ring (201) and the driving gear (301) is connected to a first guide rod (8), and the first guide rod (8) is slidably connected to the transverse plate.

10. A wiring harness fixing device for an electric vehicle as claimed in claim 4, characterized in that: A second guide rod (9) is connected inside the installation frame (1), the nut (402) is slidably connected to the second guide rod (9), and a guide opening adapted to the second guide rod (9) is provided on the nut (402).

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