New energy automobile motor protection device

Abstract

The invention relates to a new energy automobile motor protection device, and belongs to the technical field of motor protection. Comprising a shell, a motor body is installed in the shell, end covers are installed on the two sides of the motor body, a sealing protection assembly is arranged at the shaft end of the motor body, an arc-shaped supporting table is installed at the bottom of the motor, supporting rods are fixedly connected to the bottom of the arc-shaped supporting table, and a crumple anti-collision assembly is arranged between every two adjacent supporting rods. An air bag is installed at the bottom of the arc-shaped supporting table, a triggering assembly is arranged in the crumple anti-collision assembly, and a pressure maintaining assembly is arranged above the crumple anti-collision assembly. The sealing protection assembly is arranged between the end cover and the driving shaft, and the sealing protection assembly is used for realizing self-adaptive fitting depending on the pressure change of gas in the motor body. The problems that motor protection sealing reliability on an existing new energy electric vehicle is insufficient, the anti-collision capacity is limited, and protection continuity is poor can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of motor protection technology, and in particular to a motor protection device for new energy vehicles. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the complexity and harshness of the working environment of the motor, as a core power component, are becoming increasingly prominent, and the requirements for its protection performance are constantly increasing. New energy vehicle motors are typically installed at the bottom of the vehicle and are exposed to complex road conditions for extended periods. They are susceptible to external impacts such as collisions with road debris and scratches from uneven obstacles, while also facing the risk of intrusion from rainwater, dust, mud, and other impurities. These factors can all lead to damage to the motor housing, failure of internal electronic components, and consequently affect the motor's operational stability, or even cause safety accidents.

[0003] Traditional motor shaft end sealing structures mostly use a single rubber seal, whose sealing performance depends on a fixed structural clamping force. When the motor operates under high load for extended periods, the internal electronic components heat up, causing the gas inside the cavity to expand and the pressure to rise. Traditional seals are prone to bulging and deformation under high pressure, leading to gaps between the sealing lip and the drive shaft, resulting in seal failure. External impurities then enter, accelerating drive shaft wear and internal component corrosion, shortening the motor's lifespan. Existing motor support structures mostly use rigid connection designs. While these can meet conventional support requirements, they are unable to effectively absorb impact energy in the event of a strong impact from the bottom. The impact force is directly transmitted to the motor body, causing serious failures such as motor housing deformation, bearing damage, and winding insulation damage. Although some protective devices are equipped with buffer structures, they suffer from slow response speed and limited buffering effect, and lack a post-impact pressure maintenance mechanism. Even if cushioning components such as airbags inflate rapidly, pressure leakage may reduce the protective effect, failing to provide continuous and effective protection for the motor.

[0004] Therefore, this application provides a protective device for the motor of a new energy vehicle to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a protective device for the motor of a new energy vehicle to solve the problems of insufficient sealing reliability, limited impact resistance and poor continuous protective effect.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A protective device for a new energy vehicle motor includes a housing, within which a motor body is installed. End caps are installed on both sides of the motor body. A sealing and protective assembly is provided at the shaft end of the motor body. An arc-shaped support platform is installed at the bottom of the motor. A support rod is fixedly connected to the bottom of the arc-shaped support platform. A crumple-up anti-impact assembly is provided between two adjacent support rods. An airbag is installed at the bottom of the arc-shaped support platform. A triggering component is provided inside the crumple-up anti-impact assembly. A pressure-holding component is provided above the crumple-up anti-impact assembly. The sealing and protective assembly is located between the end caps and the drive shaft. The sealing and protective assembly is used to achieve adaptive sealing based on changes in the internal gas pressure of the motor body, preventing bulging failure under high pressure. Two sets of the crumple-up anti-impact assembly are provided. The crumple-up anti-impact assembly is used to inflate the airbag when the bottom of the vehicle is impacted, protecting the motor body. The triggering component is located at the bottom of the pressure-holding assembly and is used to trigger the pressure-holding assembly to start working. Two sets of the pressure-holding assembly are provided. The pressure-holding assembly is used to maintain stable air pressure inside the airbag.

[0007] Optionally, the support rod is provided with a first guide groove and a second guide groove at the middle position. The diameter of the first guide groove is larger than that of the second guide groove. The first guide groove is located on the side away from the center of the motor body, and the second guide groove is located on the side closer to the center of the motor body.

[0008] Optionally, the sealing and protection assembly includes a sealing ring and a gas storage tank. The sealing ring is hollow inside, and the outer side of the sealing ring is made of aluminum alloy. A positioning groove is provided on the sealing ring, and a positioning protrusion is installed on the end cap. The positioning protrusion fits into the positioning groove.

[0009] Optionally, the inner side of the sealing ring is made of silicone rubber, and a fluororubber sealing lip is attached to the inner side of the silicone rubber. The inner side of the fluororubber sealing lip is rotatably connected to the drive shaft of the motor body.

[0010] Optionally, the bottom of the gas storage tank is fixedly connected to a mounting base, the mounting base and the end cover are detachably installed by bolts, the mounting base is made of thin-walled aluminum alloy, the gas storage tank is pre-filled with nitrogen, a gas pipeline is fixedly connected between the gas storage tank and the sealing ring, and a temperature control valve is installed on the gas pipeline.

[0011] Optionally, the crumple zone impact-resistant component includes a connector, the connection point of which is located on the upper and lower sides of the first and second guide grooves. The connector is fixedly connected to a first movable rod, the top of which is provided with a conical block. A hollow tube is provided between the two first movable rods, and a second gas storage tank is installed inside the first hollow tube. The second gas storage tank is pre-filled with nitrogen. The first movable rod is slidably connected inside the first hollow tube.

[0012] Optionally, the top of the first hollow tube is connected to a second hollow tube, a piston is slidably connected inside the second hollow tube, a triggering component is fixedly connected to the top of the piston, and gas pipes are connected to the left and right sides of the second hollow tube, and gas pipes are connected to airbags.

[0013] Optionally, the airbag is installed at the bottom of the arc-shaped limiting plate, and mounting seats two are fixedly connected to both sides of the arc-shaped limiting plate. The mounting seats two are fixedly installed at the bottom of the arc-shaped support platform.

[0014] Optionally, the triggering component includes a guide cylinder with an air hole, and a second movable rod is slidably connected inside the guide cylinder, with an elastic protrusion at the top of the second movable rod.

[0015] Optionally, the pressure-holding assembly includes a gas storage tank three, which is pre-filled with nitrogen. Four sets of fixing plates are fixedly connected inside the gas storage tank three, and springs are installed on the fixing plates. An arc-shaped baffle is fixedly connected to the other end of the springs. A trigger groove is provided at the bottom of the arc-shaped baffle, and a gas pipeline three is opened at the bottom of the gas storage tank three.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, a sealing and protection component is installed. This component dynamically adapts to changes in the internal gas pressure of the motor body. When the motor is running, the electronic components heat up, causing the gas inside the cavity to expand and the pressure to rise. The temperature control valve automatically opens the nitrogen channel of the gas storage tank, injecting nitrogen into the hollow cavity of the sealing ring. This causes the inner silicone rubber and fluororubber sealing lips to adhere even more tightly to the drive shaft under the pressure of the gas, counteracting the bulging tendency caused by high pressure. When the motor temperature decreases and the internal pressure drops, the temperature control valve closes, and the gas pressure inside the sealing ring remains stable, ensuring that the sealing lip always maintains effective contact with the drive shaft. This completely solves the problem of traditional sealing structures easily bulging and failing under high pressure conditions, ensuring the long-term stability of the motor shaft end seal.

[0017] By incorporating a crumple-up impact-resistant component, the guide grooves 1 and 2 on the support rod guide the support rod to crumple directionally towards the center of the motor upon impact. This deformation absorbs some of the impact energy, weakening the impact on the motor body. Through the linkage of the connector, moving rod 1, and conical block, the component rapidly converts the mechanical kinetic energy of the crumpled support rod into gas pressure energy, puncturing the pre-filled nitrogen storage tank 2 to quickly inflate the airbag. The arc-shaped limiting plate ensures the airbag expands uniformly along a preset direction, forming a flexible buffer surface to further absorb the remaining impact energy and prevent rigid impact damage to the motor. Simultaneously, the piston in the component, under nitrogen pressure, pushes the trigger component to activate the pressure-holding component, achieving a seamless connection between impact resistance and pressure protection. This ensures stable airbag pressure and that the component remains stable during normal motor operation, without interfering with transmission efficiency. The lightweight design also meets the needs of new energy vehicles.

[0018] By incorporating a trigger assembly, guide cylinder, moving rod II, and elastic protrusion, the structure can precisely connect with the gas pipeline III of the pressure-holding assembly under the action of piston thrust. This provides a stable and reliable mechanical structure for triggering the pressure-holding assembly, ensuring its timely activation during the impact protection phase and achieving a seamless connection between impact protection and pressure maintenance. The elastic protrusion can be squeezed and folded when passing through gas pipeline III and automatically recovers after entering gas tank III. This ensures smooth entry of the trigger assembly and prevents reverse withdrawal by matching the recovered size with the limit position of the gas pipeline III port, ensuring the continuous and stable operation of the pressure-holding assembly. At the same time, the air vent on the guide cylinder can open at the appropriate time, working in conjunction with the nitrogen transmission path to achieve dynamic replenishment of the airbag pressure, further ensuring the continuity and effectiveness of the protection.

[0019] By incorporating a pressure-holding component, the gas tank, pre-filled with nitrogen, is combined with four sets of fixing plates, springs, and arc-shaped baffles. In the non-triggered state, the nitrogen is tightly sealed and stored through the arc-shaped baffles, ensuring stable gas pressure and providing a sufficient and stable gas source for subsequent pressure holding. The trigger groove at the bottom of the arc-shaped baffle can precisely match the elastic protrusion of the trigger component, providing a clear point of action for pressure holding triggering and ensuring accurate and effective triggering. When the trigger component is activated, the nitrogen in the gas tank can be replenished to the airbag in a timely manner through a preset path, effectively addressing the air pressure leakage problem that may occur during the protection process, maintaining stable air pressure inside the airbag, avoiding protection failure due to insufficient air pressure, and ensuring continuous and reliable impact protection. Attached Figure Description

[0020] Figure 1 A three-dimensional structural diagram of a protective device for the motor of a new energy vehicle. Figure 2 This is a schematic diagram of the three-dimensional structure of the motor body; Figure 3 This is a cross-sectional view of the motor body; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the diagram; Figure 5 This is a schematic diagram of the three-dimensional structure of the arc-shaped support platform; Figure 6 Main view of the crumple zone impact protection component; Figure 7 This is a cross-sectional view of hollow tube 2; Figure 8 This is a schematic diagram of the three-dimensional structure of the airbag; Figure 9 To trigger the main view of the component; Figure 10 This is a schematic diagram of the three-dimensional structure of the pressure holding assembly; Figure 11This is a schematic diagram of the three-dimensional structure of the arc-shaped baffle. Figure 12 Side view of the pressure holding assembly; Figure 13 This is a schematic diagram of the working principle of the pressure holding component.

[0021] Figure label: 1. Outer casing; 2. Motor body; 201. End cover; 202. Positioning protrusion; 203. Arc-shaped support platform; 204. Support rod; 205. Induction groove one; 206. Induction groove two; 3. Sealing and protection assembly; 301. Sealing ring; 302. Positioning groove; 303. Silicone rubber; 304. Fluororubber sealing lip; 305. Mounting base one; 306. Gas tank one; 307. Gas pipeline one; 308. Temperature control valve; 4. Collapsible impact-resistant assembly; 401. Connector; 402. Moving rod one; 40 3. Conical block; 404. Hollow tube one; 405. Gas tank two; 406. Hollow tube two; 407. Piston; 408. Gas pipeline two; 409. Mounting base two; 410. Arc-shaped limiting plate; 411. Airbag; 5. Trigger assembly; 501. Guide cylinder; 502. Air hole; 503. Moving rod two; 504. Elastic protrusion; 6. Pressure holding assembly; 601. Gas tank three; 602. Fixing plate; 603. Spring; 604. Arc-shaped baffle; 605. Trigger groove; 606. Gas pipeline three. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0023] like Figures 1 to 13As shown, an embodiment of the present invention provides a protective device for a new energy vehicle motor, including a housing 1, a motor body 2 installed inside the housing 1, end caps 201 installed on both sides of the motor body 2, a sealing and protective assembly 3 provided at the shaft end of the motor body 2, an arc-shaped support platform 203 installed at the bottom of the motor, a support rod 204 fixedly connected to the bottom of the arc-shaped support platform 203, a crumple-resistant anti-impact assembly 4 provided between two adjacent support rods 204, an airbag 411 installed at the bottom of the arc-shaped support platform 203, a triggering assembly 5 provided inside the crumple-resistant anti-impact assembly 4, a pressure-holding assembly 6 provided above the crumple-resistant anti-impact assembly 4, and the sealing and protective assembly 3 being located between the end caps 201 and the drive shaft. The sealing and protective assembly 3 is used to achieve adaptive fitting based on changes in the gas pressure inside the motor body 2, avoiding bulging failure under high pressure. Two sets of crumple-resistant anti-impact assemblies 4 are provided, and the crumple-resistant anti-impact assemblies 4 are used to inflate the airbag 411 when the bottom of the vehicle is impacted. The airbag 411 is protected by air. The trigger component 5 is located at the bottom of the pressure-holding component 6. The trigger component 5 is used to trigger the pressure-holding component 6 to start working. There are two sets of pressure-holding components. The pressure-holding component 6 is used to maintain the air pressure inside the airbag 411. The sealing protection component 3 achieves adaptive fitting based on the changes in the air pressure inside the motor, which solves the problem of the sealing structure bulging and failing under high pressure conditions and ensures the sealing stability of the motor shaft end. The collapsible anti-impact component 4 can inflate the airbag 411 when the bottom of the car is impacted, and form a flexible buffer with the airbag 411 to reduce the impact damage to the motor body 2. The trigger component 5 accurately triggers the pressure-holding component 6 to work. The pressure-holding component 6 maintains the air pressure of the airbag 411 to ensure that the protection effect is continuous and effective. The arc-shaped support platform 203 and the support rod 204 provide a stable support foundation for the motor. All components work together to form a dual protection system of sealing protection and anti-impact protection, which improves the reliability and safety of the new energy vehicle motor.

[0024] like Figures 3 to 4As shown, the sealing and protective assembly 3 includes a sealing ring 301 and an air tank 306. The sealing ring 301 is hollow inside, and its outer side is made of aluminum alloy. A positioning groove 302 is provided on the sealing ring 301, and a positioning protrusion 202 is installed on the end cap 201. The positioning protrusion 202 fits into the positioning groove 302. The inner side of the sealing ring 301 is made of silicone rubber 303, and a fluororubber sealing lip 304 is attached to the inner side of the silicone rubber 303. The inner side of the fluororubber sealing lip 304 is rotatably connected to the drive shaft of the motor body 2. A mounting base 305 is fixedly connected to the bottom of the air tank 306. The mounting base 305 and the end cap 201 are detachably installed by bolts. The mounting base 305 is made of thin-walled aluminum alloy. The air tank 306 is pre-filled with... Nitrogen is introduced into the gas tank. A gas pipeline 307 is fixedly connected between the gas tank 306 and the sealing ring 301. A temperature control valve 308 is installed on the gas pipeline 307. The sealing ring 301 adopts a composite structure with an outer aluminum alloy, an inner silicone rubber 303, and a fluororubber sealing lip 304, which balances structural rigidity and sealing flexibility. The fitting design of the positioning protrusion 202 and the positioning groove 302 enables the sealing ring 301 to be installed quickly and accurately, improving assembly efficiency. The gas tank 306 is pre-filled with nitrogen, and the temperature control valve 308 enables the intelligent opening and closing of the gas pipeline 307. It can automatically adjust the gas pressure inside the sealing ring 301 according to the motor operating temperature, so that the fluororubber sealing lip 304 always fits tightly against the drive shaft, adapting to changes in the internal pressure of the motor, and the sealing effect is not affected by the operating conditions.

[0025] like Figures 5 to 8As shown, the support rod 204 has a first guide groove 205 and a second guide groove 206 at its middle position. The diameter of the first guide groove 205 is larger than that of the second guide groove 206. The first guide groove 205 is located on the side away from the center of the motor body 2, and the second guide groove 206 is located on the side closer to the center of the motor body 2. The collapsible impact-resistant assembly 4 includes a connector 401. The connection between the connector 401 and the support rod 204 is located on the upper and lower sides of the first guide groove 205 and the second guide groove 206. The connector 401 is fixedly connected to a first movable rod 402. A conical block 403 is provided at the top of 02. A hollow tube 404 is provided between the two moving rods 402. A gas storage tank 405 is installed inside the hollow tube 404 and is pre-filled with nitrogen. The moving rods 402 are slidably connected inside the hollow tube 404. A hollow tube 406 is connected to the top of the hollow tube 404. A piston 407 is slidably connected inside the hollow tube 406. A trigger assembly 5 is fixedly connected to the top of the piston 407. Gas pipes 408 are connected to the left and right sides of the hollow tube 406. Route 2 408 is connected to an airbag 411, which is installed at the bottom of the arc-shaped limiting plate 410. Mounting seats 2 409 are fixedly connected to both sides of the arc-shaped limiting plate 410. Mounting seats 2 409 are fixedly installed at the bottom of the arc-shaped support platform 203. The support rod 204 is provided with guide grooves 1 205 and 206 of different diameters to create a stress concentration area. This guides the support rod 204 to collapse directionally towards the center of the motor when impacted, absorbing impact energy through its own deformation and weakening the impact force transmitted to the motor body 2, thus achieving passive impact resistance. The collapsible impact-resistant component 4, through the linkage design of the moving rod 402, the conical block 403 and the gas tank 405, converts the mechanical kinetic energy of the collapsing support rod 204 into gas pressure energy, quickly punctures the gas tank 405 to release nitrogen, and provides a power source for the inflation of the airbag 411. It has high energy conversion efficiency and fast response speed. The arc-shaped limiting plate 410 provides the installation foundation and expansion guide for the airbag 411, ensuring that the expansion direction of the airbag 411 is controllable, forming a uniform flexible buffer support surface, and avoiding the disorderly expansion of the airbag 411 from affecting the protective effect.

[0026] like Figure 9 As shown, the triggering component 5 includes a guide cylinder 501 with an air hole 502. A second movable rod 503 is slidably connected inside the guide cylinder 501, and an elastic protrusion 504 is provided on the top of the second movable rod 503. The structural design of the guide cylinder 501, the second movable rod 503 and the elastic protrusion 504 of the triggering component 5 can accurately connect with the gas pipeline 606 of the pressure holding component 6 under the thrust of the piston 407, providing a stable and reliable mechanical triggering structure for the triggering of the pressure holding component 6, ensuring that the pressure holding component 6 is activated in time during the impact protection stage, and connecting the workflow of impact protection and air pressure maintenance.

[0027] like Figures 10 to 13As shown, the pressure-holding assembly 6 includes a gas storage tank 601, which is pre-filled with nitrogen. Four sets of fixing plates 602 are fixedly connected inside the gas storage tank 601. Springs 603 are installed on the fixing plates 602, and an arc-shaped baffle 604 is fixedly connected to the other end of each spring 603. A trigger groove 605 is provided at the bottom of the arc-shaped baffle 604. A gas pipeline 606 is provided at the bottom of the gas storage tank 601. The combination structure of the four sets of arc-shaped baffles 604 and springs 603 inside the gas storage tank 601 allows for tight contact in the non-triggered state, achieving sealed storage of nitrogen. The gas storage tank 601 is kept in a stable nitrogen pressure. The trigger groove 605 at the bottom of the arc-shaped baffle 604 can precisely match the elastic protrusion 504 of the trigger component 5, providing a clear point of action for the triggering of the pressure holding component 6, ensuring the accuracy and effectiveness of the triggering action. The diameter design of the gas pipeline 606 matches the deformation characteristics of the elastic protrusion 504, which not only ensures that the trigger component 5 can smoothly enter the gas storage tank 601, but also limits and fixes the trigger component 5 through the restoration of the elastic protrusion 504, preventing reverse withdrawal and ensuring the continuous operation of the pressure holding component 6.

[0028] The working principle of the technical solution provided by this invention is as follows: The sealing and protection component 3 is installed between the end cover 201 and the drive shaft. It ensures the sealing effect through a dual structure. The outer side of the sealing ring 301 is made of aluminum alloy and is fixedly installed by the engagement of the positioning protrusion 202 and the positioning groove 302. The inner side is made of silicone rubber 303 and is bonded to the fluororubber sealing lip 304, forming a basic seal with the drive shaft. When the motor body 2 is working, the internal electronic components heat up, causing the gas in the cavity to expand and the pressure to rise. At this time, the temperature control valve 308 detects the temperature change and opens automatically. Nitrogen gas in the gas tank 306 is injected into the hollow cavity of the sealing ring 301 through the gas pipeline 307. This causes the silicone rubber 303 and the fluororubber sealing lip 304 on the inner side of the sealing ring 301 to be subjected to gas pressure, further tightening their contact with the surface of the drive shaft and counteracting the expansion tendency caused by high pressure. When the motor temperature decreases and the internal pressure drops, the temperature control valve 308 closes automatically, and the gas pressure in the sealing ring 301 remains stable, ensuring that the sealing lip always maintains effective contact with the drive shaft, achieving adaptive sealing adjustment, and preventing external dust and moisture from entering the motor.

[0029] When the bottom of the car is violently impacted, the impact force acts on the crumple-resistant impact component 4 at the bottom of the arc-shaped support platform 203. The guide groove 205 on the support rod 204 is farther away from the center of the motor and has a larger diameter, while the guide groove 206 is closer to the center of the motor and has a smaller diameter. The impact force is transmitted along the arc-shaped support platform 203 to the support rod 204. Because the structural strength of the guide grooves 205 and 206 is lower than that of other parts of the support rod 204, they become stress concentration areas, guiding the middle area of ​​the support rod 204 to crumple towards the center of the motor. Through its own deformation, it absorbs part of the impact energy and weakens the impact force directly transmitted to the motor body 2. When the support rod 204 crumples, the connector 401 moves synchronously with the support rod 204, causing the movable rod 402 fixedly connected to it to slide along the hollow tube 404. The conical block 403 at the top of the movable rod 402 moves into the hollow tube 404 and punctures the part installed in the hollow tube 404. The nitrogen in the gas storage tank 405 inside the 04 is rapidly released into the hollow tube 404. The hollow tube 404 is connected to the top hollow tube 406. High-pressure nitrogen rapidly flows into the hollow tube 406, pushing the piston 407 inside the hollow tube 406 to slide upward, completing the conversion of impact energy into gas pressure energy. The left and right sides of the hollow tube 406 are directly connected to the airbag 411 through the gas pipe 408. When the piston 407 moves upward under the action of nitrogen pressure, the high-pressure nitrogen in the hollow tube 406 is rapidly injected into the airbag 411 through the gas pipe 408. The airbag 411 is installed at the bottom of the arc-shaped limiting plate 410. The arc-shaped limiting plate 410 is fixed to the arc-shaped support platform 203 by the mounting base 409, providing the installation base and expansion guide for the airbag 411, so that the airbag 411 can expand rapidly in a short time, forming a flexible buffer support surface at the bottom of the motor to resist the remaining impact force.

[0030] When piston 407 moves upward to the top of hollow tube 406, the moving rod 503 of trigger assembly 5 and the elastic protrusion 504 align with the gas pipeline 606 at the bottom of pressure holding assembly 6. Under the continuous upward thrust of piston 407, the two enter the gas tank 601 along the gas pipeline 606. The diameter of the gas pipeline 606 is smaller than the size of the elastic protrusion 504 in its natural state. When the elastic protrusion 504 passes through the gas pipeline 606, it is squeezed and folded up by the channel wall to ensure smooth entry into the gas tank 601. After entering the gas tank 601, the squeezing constraint is released. The elastic protrusion 504 quickly recovers its original size, which is larger than the diameter of the gas pipeline 606. The recovered elastic protrusion 504 precisely corresponds to the trigger groove 605 in the gas storage tank 601. The trigger groove 605 compresses the arc-shaped baffle 604. At the same time, the moving rod 503 and the elastic protrusion 504 are limited by the port of the gas pipeline 606 and cannot be withdrawn in reverse, thus fixing the trigger component 5 in the gas storage tank 601. Due to the compression of the elastic protrusion 504, the four arc-shaped baffles 604 that were originally tightly fitted together have gaps, providing a channel for the release of nitrogen in the gas storage tank 601.

[0031] When the arc-shaped baffle 604 is squeezed by the elastic protrusion 504 to create a gap, the high-pressure nitrogen in the gas storage tank 601 enters the internal channel of the moving rod 503 through the gap, and then flows into the guide cylinder 501 below. At this time, there is still a large amount of high-pressure nitrogen in the gas storage tank 405, which exerts a continuous upward thrust on the piston 407 and the guide cylinder 501, causing the moving rod 503 to press tightly against the bottom of the guide cylinder 501. The air hole 502 on the guide cylinder 501 is blocked, and the nitrogen flowing into the guide cylinder 501 from the gas storage tank 601 cannot enter the hollow tube 406 and is temporarily stored inside the guide cylinder 501. As the inflation process of the airbag 411 progresses, the amount of nitrogen in the gas storage tank 405 gradually decreases, and its upward thrust on the piston 407 and the guide cylinder 501 decreases simultaneously. When the thrust is insufficient to support When piston 407 and guide cylinder 501 are in a high position, piston 407 and guide cylinder 501 slowly descend, and moving rod 2 503 no longer presses against the bottom of guide cylinder 501. The vent 502 on guide cylinder 501 opens. After the vent 502 on guide cylinder 501 opens, the nitrogen gas temporarily stored in guide cylinder 501 enters hollow tube 2 406 through vent 502, and then flows into airbag 411 through gas pipeline 2 408. If airbag 411 experiences air pressure leakage during the protection process, nitrogen gas in gas storage tank 3 601 will continuously replenish airbag 411 through the gap of arc baffle 604, the channel of moving rod 2 503, the vent 502 of guide cylinder 501, hollow tube 2 406, and gas pipeline 2 408, maintaining stable air pressure inside airbag 411 and avoiding failure of protection effect due to insufficient air pressure.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A protective device for a new energy vehicle motor, characterized in that, The device includes a housing (1), a motor body (2) installed inside the housing (1), end caps (201) installed on both sides of the motor body (2), a sealing and protective assembly (3) provided on the shaft end of the motor body (2), an arc-shaped support platform (203) installed at the bottom of the motor, a support rod (204) fixedly connected to the bottom of the arc-shaped support platform (203), a crumple-resistant impact assembly (4) provided between two adjacent support rods (204), an airbag (411) installed at the bottom of the arc-shaped support platform (203), a trigger assembly (5) provided inside the crumple-resistant impact assembly (4), and a pressure-holding assembly (6) provided above the crumple-resistant impact assembly (4). The sealing and protection component (3) is disposed between the end cover (201) and the drive shaft. The sealing and protection component (3) is used to achieve adaptive fitting by relying on the change of gas pressure inside the motor body (2) to avoid bulging failure under high pressure. The crumple-resistant impact assembly (4) is provided in two sets. The crumple-resistant impact assembly (4) is used to inflate the airbag (411) when the bottom of the car is hit, so as to protect the motor body (2). The trigger component (5) is located at the bottom of the pressure holding component (6), and the trigger component (5) is used to trigger the pressure holding component (6) to start working; The pressure-holding assembly (6) is provided in two sets, and the pressure-holding assembly (6) is used to maintain the air pressure stability inside the airbag (411).

2. The new energy vehicle motor protection device according to claim 1, characterized in that, The support rod (204) is provided with an induction groove 1 (205) and an induction groove 2 (206) in the middle position. The diameter of the induction groove 1 (205) is larger than that of the induction groove 2 (206). The induction groove 1 (205) is located on the side away from the center of the motor body (2), and the induction groove 2 (206) is located on the side close to the center of the motor body (2).

3. The new energy vehicle motor protection device according to claim 2, characterized in that, The sealing and protective assembly (3) includes a sealing ring (301) and a gas storage tank (306). The sealing ring (301) is hollow inside. The outer side of the sealing ring (301) is made of aluminum alloy. A positioning groove (302) is provided on the sealing ring (301). A positioning protrusion (202) is installed on the end cap (201). The positioning protrusion (202) fits into the positioning groove (302).

4. The new energy vehicle motor protection device according to claim 3, characterized in that, The inner side of the sealing ring (301) is made of silicone rubber (303), and a fluororubber sealing lip (304) is attached to the inner side of the silicone rubber (303). The inner side of the fluororubber sealing lip (304) is rotatably connected to the drive shaft of the motor body (2).

5. The new energy vehicle motor protection device according to claim 4, characterized in that, The bottom of the gas storage tank (306) is fixedly connected to the mounting base (305). The mounting base (305) and the end cover (201) are detachably installed by bolts. The mounting base (305) is made of thin-walled aluminum alloy. The gas storage tank (306) is pre-filled with nitrogen. A gas pipeline (307) is fixedly connected between the gas storage tank (306) and the sealing ring (301). A temperature control valve (308) is installed on the gas pipeline (307).

6. The new energy vehicle motor protection device according to claim 5, characterized in that, The collapsible impact-resistant component (4) includes a connector (401). The connection between the connector (401) and the support rod (204) is located on the upper and lower sides of the first guide groove (205) and the second guide groove (206). The connector (401) is fixedly connected to a first moving rod (402). A cone block (403) is provided at the top of the first moving rod (402). A hollow tube (404) is provided between the two first moving rods (402). A second gas storage tank (405) is installed inside the first hollow tube (404). The second gas storage tank (405) is pre-filled with nitrogen. The first moving rod (402) is slidably connected inside the first hollow tube (404).

7. The new energy vehicle motor protection device according to claim 6, characterized in that, The top of the first hollow tube (404) is connected to the second hollow tube (406), and a piston (407) is slidably connected inside the second hollow tube (406). A trigger assembly (5) is fixedly connected to the top of the piston (407). Gas pipelines (408) are connected to the left and right sides of the second hollow tube (406), and gas pipelines (408) are connected to airbags (411).

8. The new energy vehicle motor protection device according to claim 7, characterized in that, The airbag (411) is installed at the bottom of the arc-shaped limiting plate (410), and the two sides of the arc-shaped limiting plate (410) are fixedly connected to the mounting base (409), which is fixedly installed at the bottom of the arc-shaped support platform (203).

9. The new energy vehicle motor protection device according to claim 8, characterized in that, The triggering component (5) includes a guide cylinder (501), on which an air hole (502) is provided, and a second movable rod (503) is slidably connected inside the guide cylinder (501), and an elastic protrusion (504) is provided on the top of the second movable rod (503).

10. The new energy vehicle motor protection device according to claim 9, characterized in that, The pressure holding assembly (6) includes a gas storage tank three (601), which is pre-filled with nitrogen. Four sets of fixing plates (602) are fixedly connected inside the gas storage tank three (601). A spring (603) is installed on the fixing plate (602). An arc-shaped baffle (604) is fixedly connected to the other end of the spring (603). A trigger groove (605) is provided at the bottom of the arc-shaped baffle (604). A gas pipeline three (606) is opened at the bottom of the gas storage tank three (601).

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