An electric vehicle lightweight trailing arm assembly and electric vehicle thereof

Abstract

The present application relates to a kind of electric vehicle light-weighting trailing arm assemblies and its electric vehicle, including trailing arm main body, the trailing arm main body includes support middle part, the support middle part two ends are respectively set as first connecting end and second connecting end, the detection mechanism for monitoring is installed in the support middle part, the protection mechanism for bushing heat dissipation dustproof protection is installed in the second connecting end, the support middle part is provided with recessed rib, and first mounting hole is set in the support middle part;Detection mechanism is set on the trailing arm main body, and the contact head of second installation arm is always combined with the surface of trailing arm main body by torsion spring, with the movement of electric vehicle, trailing arm main body is vibrated and automatically adjusted amplitude, second installation arm is synchronously rotated, and angle sensor is cooperated to carry out real-time detection to trailing arm main body, it is convenient to quickly and conveniently understand the use condition of trailing arm main body, and avoid existing security risk to find not in time.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle component technology, and in particular to a lightweight trailing arm assembly for electric vehicles and the electric vehicle thereof. Background Technology

[0002] Electric vehicles are vehicles that use on-board power sources to drive the wheels with electric motors and meet all requirements of road traffic and safety regulations. With the development of society, electric vehicles are becoming more and more popular. In order to meet people's requirements for vehicle handling stability, driving comfort and driving safety, the application of multi-link independent suspension in vehicle chassis is gradually increasing. Among them, the performance of independent suspension mainly depends on the design of the trailing arm structure in the suspension.

[0003] While existing trailing arm components are designed for lightweighting, they are prone to breakage or bending due to torque and fatigue during long-term vehicle operation, affecting the normal use of electric vehicles. Furthermore, drivers may not be able to detect this immediately while driving, leading to safety hazards.

[0004] Meanwhile, the trailing arm is connected to the vehicle chassis via bushings. The bushings are located at the bottom of the vehicle chassis and exposed to the air. During the operation of the electric vehicle, dust and impurities easily adhere to the bushings. Over time, dust and impurities can easily transfer between the bushings and the trailing arm, causing surface damage to the bushings during friction, eventually leading to wear and tear. Furthermore, the bushings and trailing arms generate a large amount of heat during continuous friction. The wear resistance and elasticity of the rubber bushings decrease as the temperature rises, affecting the normal use of the bushings. Summary of the Invention

[0005] The problem solved by this invention is to provide a lightweight trailing arm assembly for electric vehicles and the electric vehicle thereof. It addresses the issue that while existing trailing arm assemblies are designed for lightweighting, they are prone to breakage or bending due to torque and fatigue during prolonged vehicle operation, affecting the normal use of the electric vehicle. Furthermore, the driver may not immediately notice these issues, leading to safety hazards. Additionally, the trailing arm is connected to the vehicle chassis via bushings located at the bottom of the chassis and exposed to the air. During vehicle operation, dust and impurities easily adhere to the bushings, and over time, these dust and impurities can transfer between the bushing and the trailing arm, causing surface damage to the bushing during friction, ultimately resulting in wear and tear. Moreover, the continuous friction between the bushing and the trailing arm generates a large amount of heat, and the wear resistance and elasticity of the rubber bushing decrease with increasing temperature, affecting its usability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lightweight trailing arm assembly for electric vehicles includes a trailing arm body, the trailing arm body including a support center, the two ends of the support center being respectively configured as a first connecting end and a second connecting end, a detection mechanism for monitoring the trailing arm body is installed in the center of the support center, and a protection mechanism for bushing heat dissipation and dust protection is installed in the second connecting end.

[0008] Preferably, the support has a concave rib in the middle and a first mounting hole is formed in the middle of the support.

[0009] Preferably, the first connecting end is provided with a second mounting hole for installation, the second connecting end is provided with a ring sleeve, a bushing is installed inside the ring sleeve, and a bolt post is installed through the bushing.

[0010] Preferably, the detection mechanism includes a first mounting arm and a second mounting arm, which are rotatably mounted. One end of the first mounting arm is provided with a ring seat, and a bolt passes through the ring seat and the first mounting hole and is connected to a nut. One end of the second mounting arm is provided with a contact head that contacts the longitudinal arm body.

[0011] Preferably, an angle sensor is mounted on the top side of the other end of the first mounting arm, a retaining ring seat is provided on the bottom side of the other end of the first mounting arm, the other end of the second mounting arm is located inside the retaining ring seat, and a rotating shaft is mounted on the output end of the angle sensor, and the rotating shaft passes through the other end of the first mounting arm and is fixedly connected to the other end of the second mounting arm.

[0012] Preferably, a torsion spring is fitted on the outer side of the rotating shaft, and the two ends of the torsion spring are respectively connected to the other end of the first mounting arm and the other end of the second mounting arm.

[0013] Preferably, the protective mechanism includes two ring covers fitted on the outside of the ring sleeve, and a rubber sleeve that contacts the ring sleeve is provided on the inner side of the ring cover. Several support arms are provided at equal angles on the outer side of the ring cover, and all support arms are connected to the fixed ring. The fixed ring is fixedly fitted on the bolt post.

[0014] Preferably, a plurality of arc-shaped grooves are formed between the plurality of support arms and the ring cover, and an arc-shaped filter plate is installed on the outer side of the arc-shaped grooves.

[0015] Preferably, the inner wall of the ring cover is provided with a heat-conducting ring, and a heat exchange cavity is opened inside the ring cover, and the heat exchange cavity is connected to two liquid nozzles provided on the outer side of the ring cover.

[0016] An electric vehicle includes an electric vehicle body, a power module for providing driving power to the electric motor, monitoring power usage, and controlling the charger to charge the battery, an electric drive module for efficiently converting the electrical energy stored in the battery into the kinetic energy of the wheels and converting the kinetic energy of the wheels into electrical energy to charge the battery when the vehicle decelerates and brakes, a suspension module for shock absorption, an auxiliary module, and a trailing arm assembly. The auxiliary module provides functions such as auxiliary power source, power steering, navigation, air conditioning, lighting, defrosting, windshield wipers, and radio. The trailing arm assembly is installed between the suspension module and the chassis of the electric vehicle body.

[0017] The beneficial effects of the present invention are: the detection mechanism set on the main body of the longitudinal arm ensures that the contact head of the second mounting arm is always in contact with the surface of the main body of the longitudinal arm through the torsion spring. As the electric vehicle moves, the main body of the longitudinal arm vibrates and automatically adjusts the amplitude, and the second mounting arm rotates synchronously. In conjunction with the angle sensor, the main body of the longitudinal arm is detected in real time, which makes it easy to quickly and conveniently understand the usage of the main body of the longitudinal arm and avoid the failure to detect potential safety hazards in a timely manner.

[0018] After the bushing is assembled with the ring sleeve of the longitudinal arm body, the protective mechanism is then fitted onto the ring sleeve and the bushing. The rubber ring sleeve of the ring cover contacts the outer wall of the ring sleeve, and the arc-shaped filter plate on the ring cover prevents dust and impurities from adhering to the bushing, thus avoiding the impact of impurities and dust on the bushing and aggravating wear.

[0019] The refrigerant rotates within the heat exchange chamber inside the annular cover that surrounds the bushing. It exchanges heat with the bushing and the air inside the annular cover through the heat-conducting ring, which can regulate the temperature of the bushing and ensure good elasticity and wear resistance of the bushing for long-term use. Attached Figure Description

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

[0021] Figure 2 This is a schematic diagram of the longitudinal arm body and suspension module structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the main structure of the longitudinal arm of the present invention;

[0023] Figure 4 This is a schematic diagram of the detection mechanism of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged view of a portion of region A in the middle;

[0025] Figure 6 This is a cross-sectional view of the ring cover of the present invention.

[0026] Legend:

[0027] 1. Electric vehicle body; 2. Longitudinal arm body; 3. Support middle section; 4. First connecting end; 5. Second connecting end; 6. Recessed rib; 7. First mounting hole; 8. Detection mechanism; 9. Second mounting hole; 10. Ring sleeve; 11. Bushing; 12. Bolt post; 13. Protection mechanism; 14. First mounting arm; 15. Second mounting arm; 16. Angle sensor; 17. Rotating shaft; 18. Contact head; 19. Ring seat; 20. Retaining ring seat; 21. Torsion spring; 22. Ring cover; 23. Support arm; 24. Fixing ring; 25. Arc-shaped filter plate; 26. Rubber ring sleeve; 27. Heat-conducting ring; 28. Heat exchange chamber; 29. ​​Liquid nozzle. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Specific implementation examples are given below.

[0030] See Figure 1 An electric vehicle includes an electric vehicle body 1, a power module for providing drive power to the electric motor, monitoring power usage, and controlling the charger to charge the battery, an electric drive module for efficiently converting the electrical energy stored in the battery into the kinetic energy of the wheels and converting the kinetic energy of the wheels into electrical energy to charge the battery during vehicle deceleration and braking, a suspension module for shock absorption, an auxiliary module, and a trailing arm assembly. The auxiliary module provides functions such as auxiliary power source, power steering, navigation, air conditioning, lighting, defrosting, windshield wipers, and radio. The trailing arm assembly is mounted between the suspension module and the chassis of the electric vehicle body 1.

[0031] See Figure 2 and Figure 3 A lightweight trailing arm assembly for an electric vehicle includes a trailing arm body 2, which includes a support middle section 3. The two ends of the support middle section 3 are respectively set as a first connecting end 4 and a second connecting end 5. The support middle section 3 is provided with a concave rib 6 to ensure the overall strength of the trailing arm body 2. A first mounting hole 7 is provided on the support middle section 3 to facilitate the rapid installation of a detection mechanism 8. A second mounting hole 9 is provided on the first connecting end 4 for installation, so that the first connecting end 4 can be installed with the suspension module through bolts and the second mounting hole 9. A ring sleeve 10 is provided on the second connecting end 5, and a bushing 11 is installed inside the ring sleeve 10. A bolt post 12 is installed through the bushing 11, so that it can be installed and connected to the chassis of the electric vehicle body 1 through the bolt post 12.

[0032] See Figure 4 and Figure 5 A detection mechanism 8 for monitoring the longitudinal arm body 2 is installed in the middle of the support center 3. The detection mechanism 8 includes a first mounting arm 14 and a second mounting arm 15, which are rotatably mounted. One end of the first mounting arm 14 is provided with a ring seat 19, and a bolt passes through the ring seat 19 and the first mounting hole 7 to connect with a nut, thereby fixing the first mounting arm 14 to the longitudinal arm body 2 and facilitating the disassembly and assembly of the protection mechanism 13. One end of the second mounting arm 15 is provided with a contact head 18 that contacts the longitudinal arm body 2. An angle sensor 16 is installed on the top side of the other end of the first mounting arm 14 and is electrically connected to the auxiliary module. A retaining ring seat 20 is provided on the bottom side of the other end of the first mounting arm 14, and the other end of the second mounting arm 15 is located inside the retaining ring seat 20. A rotating shaft 17 is installed at the output end of the angle sensor 16, and the rotating shaft 17 passes through the other end of the first mounting arm 14 and connects to the second mounting arm 15. The other end of the mounting arm 15 is fixedly connected, and a torsion spring 21 is fitted on the outside of the rotating shaft 17. The two ends of the torsion spring 21 are respectively connected to the other end of the first mounting arm 14 and the other end of the second mounting arm 15. The first mounting arm 14 and the second mounting arm 15 are elastically connected through the torsion spring 21 and the rotating shaft 17, which facilitates the second mounting arm 15 to fit against the side wall of the longitudinal arm body 2. As the longitudinal arm body 2 deforms, the second mounting arm 15 is always in contact with the side wall of the longitudinal arm body 2, driving the rotating shaft 17 to rotate. The rotation angle of the second mounting arm 15 is transmitted to the auxiliary module through the angle sensor 16. When the longitudinal arm body 2 is in normal use, the rotation angle value of the second mounting arm 15 is within a reasonable range each time. When the longitudinal arm body 2 has a problem, the rotation angle value of the second mounting arm 15 will exceed the reasonable range each time. The auxiliary module needs to issue an early warning and check and repair or replace the longitudinal arm body 2.

[0033] See Figure 3 and Figure 6 The second connecting end 5 is equipped with a protective mechanism 13 for heat dissipation and dust protection of the bushing 11. The protective mechanism 13 includes two ring covers 22 fitted on the outside of the ring sleeve 10, and a rubber sleeve 26 in contact with the ring sleeve 10 is provided on the inner side of the ring cover 22. Several support arms 23 are provided at equal angles on the outer side of the ring cover 22, and the support arms 23 are all connected to the fixing ring 24. The fixing ring 24 is fixedly fitted on the bolt post 12, which facilitates the quick assembly of the protective mechanism 13 and the bolt post 12. Several arc-shaped grooves are formed between the several support arms 23 and the ring covers 22, and arc-shaped filter plates 25 are installed on the outer side of the arc-shaped grooves. The ring cover 22 and the fixing ring 24 are connected through the support arms 23, and the arc-shaped grooves between the support arms 23 facilitate the air circulation inside and outside the ring cover 22, ensuring the transfer of internal heat. At the same time, the arc-shaped filter plates 25 on the arc-shaped grooves are used to block external dust and impurities when the air circulates.

[0034] A heat-conducting ring 27 is provided on the inner wall of the ring cover 22. A heat exchange chamber 28 is provided inside the ring cover 22, and the heat exchange chamber 28 is connected to two liquid nozzles 29 provided on the outer side of the ring cover 22. The liquid nozzles 29 are connected to the liquid cooling pipe of the electric vehicle to realize the circulation of refrigerant in the heat exchange chamber 28. Heat is conducted and exchanged through the heat-conducting ring 27 to cool down the temperature inside the ring cover 22 and the bushing 11.

[0035] Assemble the trailing arm assembly with the suspension module and the chassis of the electric vehicle body 1. After installation, install the fixing ring 24 of the protection mechanism 13 on the bolt post 12, and cover the outer end of the bushing 11 with the ring cover 22. At this time, the ring cover 22 is in contact with the bushing 10 through the rubber ring 26 on the inner side wall. The arc-shaped filter plate 25 is installed on the outside of the ring cover 22 to facilitate the filtration of the air entering and leaving the bushing 10, preventing dust and impurities from adhering to the bushing 11. The detection mechanism 8 is installed at the first mounting hole 7 of the trailing arm body 2. The first mounting arm 14 and the second mounting arm 15 are elastically connected by a torsion spring 21 to ensure that the contact head 18 of the second mounting arm 15 is always in contact with the trailing arm body 2, thus protecting the trailing arm. The main body 2 is monitored in real time. When the main body 2 of the trailing arm is bent or broken, the vibration and automatic adjustment range of the main body 2 of the trailing arm are changed during driving. Therefore, the rotation angle of the second mounting arm 15 changes during the process of fitting with the main body 2 of the trailing arm. The data is transmitted to the auxiliary module for early warning through the rotating shaft 17 and the angle sensor 16. At the same time, when the electric vehicle is running, the bushing 11 of the trailing arm 2 is squeezed and rotated with the ring sleeve 10. The temperature of the bushing 11 gradually rises. It is connected to the liquid cooling pipe of the electric vehicle through the liquid nozzle 29 to realize the circulation of the refrigerant in the heat exchange chamber 28. Heat is conducted and exchanged through the heat conduction ring 27 to cool down the temperature inside the ring cover 22 and the bushing 11.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lightweight trailing arm assembly for electric vehicles, characterized in that, The system includes a longitudinal arm body (2), which includes a support middle part (3). The two ends of the support middle part (3) are respectively set as a first connecting end (4) and a second connecting end (5). A detection mechanism (8) for monitoring the longitudinal arm body (2) is installed in the middle of the support middle part (3), and a protection mechanism (13) for heat dissipation and dust protection of the bushing (11) is installed in the second connecting end (5). The detection mechanism (8) includes a first mounting arm (14) and a second mounting arm (15), which are rotatably mounted. One end of the first mounting arm (14) is provided with a ring seat (19), and a bolt passes through the ring seat (19) and the first mounting hole (7) to connect with a nut. One end of the second mounting arm (15) is equipped with a contact head (18) that contacts the longitudinal arm body (2). An angle sensor (16) is mounted on the top side of the other end of the first mounting arm (14). A retaining ring seat (20) is provided on the bottom side of the other end of the first mounting arm (14). The other end of the second mounting arm (15) is located inside the retaining ring seat (20). A rotating shaft (17) is installed at the output end of the angle sensor (16). The rotating shaft (17) passes through the other end of the first mounting arm (14) and is fixedly connected to the other end of the second mounting arm (15). A torsion spring (21) is fitted on the outside of the rotating shaft (17). The two ends of the torsion spring (21) are respectively connected to the other end of the first mounting arm (14) and the other end of the second mounting arm (15).

2. The lightweight trailing arm assembly for electric vehicles according to claim 1, characterized in that, The middle part (3) of the support is provided with a concave rib (6), and the middle part (3) of the support is provided with a first mounting hole (7).

3. The lightweight trailing arm assembly for electric vehicles according to claim 2, characterized in that, The first connecting end (4) is provided with a second mounting hole (9) for installation, and the second connecting end (5) is provided with a ring sleeve (10). A bushing (11) is installed inside the ring sleeve (10), and a bolt post (12) is installed through the bushing (11).

4. The lightweight trailing arm assembly for electric vehicles according to claim 3, characterized in that, The protective mechanism (13) includes two ring covers (22) fitted on the outside of the ring sleeve (10), and a rubber sleeve (26) that contacts the ring sleeve (10) is provided on the inside of the ring cover (22). Several support arms (23) are provided at equal angles on the outside of the ring cover (22), and the support arms (23) are all connected to the fixing ring (24). The fixing ring (24) is fixedly fitted on the bolt column (12).

5. A lightweight trailing arm assembly for electric vehicles according to claim 4, characterized in that, A plurality of arc-shaped grooves are formed between the plurality of support arms (23) and the ring cover (22), and an arc-shaped filter plate (25) is installed on the outside of the arc-shaped grooves.

6. A lightweight trailing arm assembly for electric vehicles according to claim 5, characterized in that, The inner wall of the ring cover (22) is provided with a heat-conducting ring (27), and a heat exchange cavity (28) is opened inside the ring cover (22), and the heat exchange cavity (28) is connected to two liquid nozzles (29) provided on the outside of the ring cover (22).

7. An electric vehicle, characterized in that, The electric vehicle includes an electric vehicle body (1), a power module for providing driving power to the motor, monitoring power usage and controlling the charger to charge the battery, an electric drive module for efficiently converting the electrical energy stored in the battery into the kinetic energy of the wheels and converting the kinetic energy of the wheels into electrical energy to charge the battery when the vehicle decelerates and brakes, a suspension module for shock absorption, an auxiliary module, and a trailing arm assembly applied to any one of claims 1-6. The auxiliary module realizes the functions of auxiliary power source, power steering, navigation, air conditioner, lighting, defrosting, wipers and radio. The trailing arm assembly is installed between the suspension module and the chassis of the electric vehicle body (1).

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