Intelligent pre-tightening control three-point type emergency locking safety belt for electric automobile and pre-tightening method of intelligent pre-tightening control three-point type emergency locking safety belt

Abstract

The invention relates to the technical field of electric vehicle safety belts, in particular to an electric vehicle intelligent control pre-tightening three-point type emergency locking safety belt and a pre-tightening method thereof.The electric vehicle intelligent control pre-tightening three-point type emergency locking safety belt comprises a connector, a winding shaft is arranged in the connector, and a woven belt is wound around the winding shaft; the pre-tightening structure is connected with the winding shaft, and the pre-tightening structure is used for driving the winding shaft to wind the woven belt; the first locking assembly and the second locking assembly are both arranged in the connector, the first locking assembly can lock the winding shaft when a driver and passengers pull the woven belt, and the second locking assembly can lock the winding shaft when the vehicle suddenly decelerates; and the connecting assembly is arranged in the connector, the connecting assembly can enable the first locking assembly and the second locking assembly to synchronously lock the winding shaft, and the operation stability of the safety belt under the emergency condition is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle seat belts, and specifically to a three-point emergency locking seat belt with intelligent control and pre-tensioning for electric vehicles and a pre-tensioning method thereof. Background Technique

[0002] Automobile seat belts are important safety protection devices for vehicle occupants. By restricting the displacement of personnel in emergency situations such as vehicle collisions and sudden braking, buffering the impact force between the body and the vehicle interior structure, and preventing vehicle occupants from suffering serious injuries. It is an effective means to reduce traffic accident casualties and is crucial for improving driving safety.

[0003] In existing automobile seat belts, usually two sets of parallel locking structures are provided. The two sets of locking structures can respectively lock the seat belt when the vehicle decelerates rapidly to avoid collision or when the vehicle occupant quickly pulls the seat belt due to inertia. That is, there are certain differences in the triggering methods of the two sets of locking structures. In emergency situations, there is a phenomenon that only one of the two sets of locking structures is triggered. And the impact force generated at the moment of locking will directly act on a single set of locking structures. Although according to existing implementation standards, the structural strength of each set of locking structures can meet the use under normal circumstances, during the long-term operation of the vehicle, the above-mentioned impact force will act on a single set of locking structures frequently, causing damage to the rotating shaft of the locking part inside the locking structure.

[0004] For the above-mentioned damage to the rotating shaft, it can be replaced subsequently. However, when the rotating shaft of the locking part is damaged, the locking part may not be able to reset in time due to jamming, causing the seat belt to remain locked after the vehicle collision. In the current situation where new energy vehicles are becoming more and more popular, when a new energy vehicle collides, the speed of spontaneous combustion and fire is extremely fast. If the locked state of the seat belt cannot be released in time, the seat belt will still restrict the vehicle occupants, resulting in the vehicle occupants losing precious escape time. Summary of the Invention

[0005] The purpose of the present invention is to provide a three-point emergency locking seat belt with intelligent control and pre-tensioning for electric vehicles and a pre-tensioning method thereof to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A three-point emergency locking seat belt with intelligent control and pre-tensioning for electric vehicles, comprising: A connector, the connector internally contains a winding shaft, and a braided belt is wound around the winding shaft; A pre-tensioning structure, connected to the winding shaft, the pre-tensioning structure is used to drive the winding shaft to wind up the braided belt; The first locking component and the second locking component are both arranged in the connector. When the driver or passenger pulls the braided belt, the first locking component can lock the winding shaft, and when the vehicle decelerates suddenly, the second locking component can lock the winding shaft; The connecting component is arranged in the connector, and the connecting component can enable the first locking component and the second locking component to lock the winding shaft synchronously.

[0007] As a further scheme of the present invention: a first gear and a second gear are rotatably installed on the connector, the first gear is meshed with the second gear, the first gear is connected to the first locking component, and the second gear is connected to the second locking component.

[0008] As a further scheme of the present invention: the first locking component includes an inner ratchet ring installed on the connector and a centrifugal deflection structure adapted to the inner ratchet ring. When the winding shaft rotates, the centrifugal deflection structure can make the winding shaft and the inner ratchet ring form a locked state.

[0009] As a further scheme of the present invention: the centrifugal deflection structure includes a follower connected coaxially with the rotating shaft of the winding shaft. A groove is formed on the follower, and a first locking tongue is rotatably installed in the groove. The first locking tongue is adapted to the abutting surface arranged on the side wall of the groove.

[0010] As a further scheme of the present invention: the second locking component includes an outer ratchet wheel connected coaxially with the second gear and a mounting bracket arranged on the connector. A second locking tongue is rotatably installed on the mounting bracket, and one end of the second locking tongue far away from its rotating shaft is adapted to the outer ratchet wheel; The second locking component further includes a guiding member arranged in the mounting bracket. A steel ball is rollably arranged in the guiding member. When the steel ball moves along the length direction of the guiding member, the steel ball can drive the second locking tongue to deflect towards the outer ratchet wheel.

[0011] As a further scheme of the present invention: the connecting component includes: An elastic torsion structure is arranged in the connector, and the elastic torsion structure can keep the first locking component in a released state for the winding shaft; A follower structure connects the elastic torsion structure and the second locking component. When the second locking component acts, the follower structure can drive the first locking component to act synchronously.

[0012] As a further scheme of the present invention: the elastic torsion structure includes two groups of extension shafts connected to the first locking component. Helical grooves are arranged along the axial direction of the extension shafts; The elastic torsion structure also includes a support sleeve arranged inside the connector, the support sleeve is connected to a connecting sleeve that is slidably fitted with the extension shaft, and a convex shaft that is slidably fitted with the spiral groove is arranged inside the connecting sleeve.

[0013] As a further solution of the present invention: the support kit includes a transverse shaft installed on the connector, a connecting rod is slidably installed on the transverse shaft, a coupling is rotatably installed on the connecting rod, and the coupling is rotatably connected to the connecting sleeve; A columnar spring is also sleeved on the transverse axis, one end of the columnar spring is connected to the connecting rod, and the other end is connected to the end of the connecting rod.

[0014] As a further solution of the present invention: the follower structure includes a hinged rod rotatably connected to the connecting rod, and a connecting plate is rotatably mounted on one end of the hinged rod away from the connecting rod, and a sliding connection portion is provided on the connecting plate, and the sliding connection portion is slidably connected to a guide portion provided on the second locking assembly; The follower structure also includes a transverse groove arranged on the connecting plate, and the transverse groove is slidably matched with the follower shaft connected to the second locking assembly.

[0015] A pre-tightening method for a three-point emergency locking safety belt of an electric vehicle with intelligent control pre-tightening as described above comprises: When the vehicle has an accident, the airbag pops out and controls the pre-tensioning structure to tighten the braided belt. At the same time, when the vehicle decelerates suddenly, the second locking assembly can drive the first locking assembly to act synchronously through the connecting assembly. At this time, the first locking assembly and the second locking assembly synchronously lock the winding shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When the vehicle decelerates suddenly or collides, the impact force generated during the emergency stop of the winding shaft can be shared by the rotating shafts of the first lock tongue and the second lock tongue, avoiding the first locking assembly and the second locking assembly working alone, which may cause the first lock tongue or the second lock tongue to be subjected to excessive impact force and break, and fail to achieve a good locking effect. In addition, the structural completeness of the rotating shafts of the first lock tongue and the second lock tongue is ensured, and the first lock tongue and the second lock tongue can be reset in time after the accident is resolved, avoiding secondary injuries to the driver and passengers due to the failure to reset the rotating shafts of the first lock tongue and the second lock tongue in time due to damage, thereby buying precious time for the driver and passengers to escape. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural schematic diagram of an embodiment of a three-point emergency locking safety belt with intelligent control pre-tightening for electric vehicles.

[0018] Figure 2Explosion diagram of the structure of the connector in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0019] Figure 3 Explosion diagram of the structure of the connector from another angle in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0020] Figure 4 Schematic diagram of the structure of the first locking component and the second locking component in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0021] Figure 5 Schematic diagram of the structure of the pre-tensioning structure in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0022] Figure 6 Explosion diagram of the structure of the first locking component and the second locking component in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0023] Figure 7 Schematic diagram of the structure of the follower and the first locking tongue in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0024] Figure 8 Schematic diagram of the structure of the second locking component in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0025] Figure 9 Cross-sectional view of the second locking component in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0026] Figure 11 Schematic diagram of the structure of the connecting component in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0027] Figure 10 Schematic diagram of the structure of the connecting plate in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0028] Figure 12 Schematic diagram of the structure of the connecting rod, coupling and connecting sleeve in an embodiment of a three-point emergency locking seat belt for intelligent control pre-tensioning of electric vehicles.

[0029] In the figure: 1. Connector; 2. Braided belt; 3. Buckle; 4. Winding reel; 5. First gear; 6. Second gear; 7. Follower; 701. Contact surface; 8. First locking tongue; 9. Extension shaft; 901. Spiral groove; 10. Inner ratchet ring; 11. Outer ratchet; 12. Mounting bracket; 1201. Arc-shaped through groove; 1202. Guide part; 13. Follower shaft; 14. Second locking tongue; 1401. Stop part; 15. Guide; 16. Steel ball; 17. Link plate; 1701. Horizontal groove; 1702. Sliding connection part; 18. Hinge rod; 19. Connecting rod; 20. Cylindrical spring; 21. Cross shaft; 22. Coupling; 23. Connecting sleeve; 2301. Convex shaft; 24. Explosion device; 25. Guide rod; 26. Tooth plate; 27. Third gear. Detailed implementation manner

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, and it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0032] Please refer to Figures 1 to 12 , in the embodiment of the present invention, a three-point emergency locking seat belt with intelligent control pre-tightening for an electric vehicle includes: a connector 1, a pre-tightening structure, a first locking assembly, a second locking assembly, and a connecting assembly.

[0033] The connector 1 internally houses a winding reel 4, a braided belt 2 is wound around the winding reel 4, and a buckle 3 is provided at one end of the braided belt 2 away from the winding reel 4; The pre-tightening structure is connected to the winding reel 4, and the pre-tightening structure is used to drive the winding reel 4 to wind up the braided belt 2. The pre-tightening assembly includes a third gear 27 coaxially connected to the winding reel 4 and a guide rod 25 provided on the connector 1. A tooth plate 26 is slidably mounted on the guide rod 25, and the tooth plate 26 is connected to an explosion device 24 provided in the connector 1.

[0034] When a vehicle encounters an emergency situation and collides, the collision sensor will quickly detect the vehicle collision and the intensity of the collision. Once the monitored impact force exceeds the preset threshold, the sensor will immediately activate the airbag control unit and trigger the airbag to pop out, providing key protection for the limbs of the driver and passengers, and effectively reducing the risk of personal injury. At the same time, the collision sensor will also accurately control the explosive device 24, using a micro-explosion to drive the tooth plate 26 to move. When the tooth plate 26 moves to engage with the third gear 27, the third gear 27 drives the winding reel 4 to rotate, thereby winding the braided belt 2. This process can safely restrain the driver and passengers on the seat, prevent them from being too close to the vehicle body due to inertia, and avoid the situation where the driver and passengers cannot be effectively restrained even if the winding reel 4 is locked, thereby fully protecting the safety of the driver and passengers in emergency collision situations.

[0035] See also Figure 4 , Figure 6 The first locking assembly and the second locking assembly are both arranged in the connector 1. The first locking assembly can lock the winding shaft 4 when the driver and the passenger pull the braid 2. The second locking assembly can lock the winding shaft 4 when the vehicle decelerates suddenly. Specifically, a first gear 5 and a second gear 6 are rotatably installed on the connector 1. The first gear 5 is meshed with the second gear 6, and the first gear 5 is connected to the first locking assembly, and the second gear 6 is connected to the second locking assembly.

[0036] In the event of an emergency collision, the first gear 5 and the second gear 6 are tightly meshed with a transmission ratio of approximately 1:1, which can ensure that when the winding shaft 4 moves, the first locking assembly and the second locking assembly are synchronously and accurately driven to work in conjunction. When the vehicle is hit, the first locking assembly and the second locking assembly can simultaneously or separately reliably lock the winding shaft 4. This two-way tight connection mechanism can not only provide double protection to ensure that the seat belts are firmly restrained to the driver and passengers in an instant, but also can flexibly adjust the locking mode according to actual needs under complex collision conditions. It can minimize the risk of forward rush caused by loose seat belts or untimely locking, effectively reduce the damage to drivers and passengers caused by collisions, comprehensively improve driving safety, and build a solid and reliable safety barrier for the occupants in the vehicle.

[0037] See also Figure 4 , Figure 6 , Figure 7, the first locking component includes an inner ratchet ring 10 installed on the connector 1 and a centrifugal deflection structure adapted to the inner ratchet ring 10. The centrifugal deflection structure can form a locking state between the winding shaft 4 and the inner ratchet ring 10 when the winding shaft 4 rotates. The centrifugal deflection structure includes a follower 7 coaxially connected to the rotating shaft of the winding shaft 4. A groove is formed on the follower 7, and a first locking tongue 8 is rotatably installed in the groove. The first locking tongue 8 is adapted to an abutting surface 701 provided on the side wall of the groove.

[0038] In the initial state, the connection component keeps the first locking tongue 8 away from the abutting surface 701. At this time, if the winding shaft 4 rotates at a speed lower than a predetermined speed of about 100 revolutions per minute, the first locking tongue 8 will not be thrown outwards by centrifugal force. This ensures that when the braided belt 2 is pulled during normal driving, the braided belt 2 can be smoothly pulled out. When a vehicle collision occurs and the driver and passengers move away from the seat due to inertia, when the winding shaft 4 is driven by the braided belt 2 to rotate rapidly (such as at a speed exceeding 100 revolutions per minute) at a speed exceeding the predetermined speed, the first locking tongue 8 deflects rapidly (within about 0.01 seconds) towards the abutting surface 701 under the action of centrifugal force and engages with the ratchet teeth of the inner ratchet ring 10 to lock the winding shaft 4, ensuring that the braided belt 2 effectively restrains the driver and passengers and reducing the risk of injury.

[0039] At the moment of collision, the first locking tongue 8 abuts against the abutting surface 701 and engages with the inner ratchet ring 10. At this time, the abutting surface 701 provides support for the first locking tongue 8, dispersing about 30% of the impact force and significantly reducing the risk of its bending deformation, ensuring the locking reliability. This design can effectively restrain the driver and passengers in an emergency. Cooperating with the airbag, it is expected to reduce the injury probability by about 40% - 60% and improve the driving safety.

[0040] Please refer to Figure 4 、 Figure 6 、 Figure 8 、 Figure 9 , the second locking component includes an outer ratchet 11 coaxially connected to the second gear 6 and a mounting bracket 12 provided on the connector 1. A second locking tongue 14 is rotatably installed on the mounting bracket 12. One end of the second locking tongue 14 away from its rotating shaft is adapted to the outer ratchet 11. A stop portion 1401 is further provided on the second locking tongue 14; The second locking component further includes a guide member 15 provided in the mounting bracket 12. A steel ball 16 is rollably provided in the guide member 15. When the steel ball 16 moves along the length direction of the guide member 15, it can drive the second locking tongue 14 to deflect towards the outer ratchet 11.

[0041] Similarly, in the initial state, the connecting component keeps the second locking tongue 14 away from the outer ratchet wheel 11. At this time, when the winding shaft 4 rotates, the second locking tongue 14 will not interfere with the outer ratchet wheel 11, thus ensuring that when the braided belt 2 is pulled during normal driving, the braided belt 2 can be smoothly pulled out. When the vehicle decelerates suddenly to avoid a collision but fails to avoid it, the steel ball 16 can, during the sudden deceleration process, move along the length direction of the guiding member 15 by its own inertia and act on the second locking tongue 14, causing the second locking tongue 14 to deflect downward, thereby locking the outer ratchet wheel 11. At this time, the outer ratchet wheel 11 locks the winding shaft 4 through the first gear 5 and the second gear 6, so that the winding shaft 4 can be locked during the sudden deceleration process, ensuring the effective restraint of the braided belt 2 on the limbs of the driver and passengers.

[0042] Through the above settings, the first locking tongue 8 and the inner ratchet ring 10, and the second locking tongue 14 and the outer ratchet wheel 11 act together to achieve a dual locking mechanism for the winding shaft 4. This dual locking mechanism can provide reliable protection both before and during an accident. During normal driving, it ensures that the normal use of the seat belt is not affected; in an emergency, it quickly and reliably locks the winding shaft 4 to ensure that the seat belt can effectively restrain the driver and passengers and reduce the injuries caused by inertial forward impact. This dual protection mechanism significantly improves the safety of the vehicle and provides more comprehensive and reliable protection for the driver and passengers.

[0043] Please refer to Figure 2 、 Figures 10 to 12 , the connecting component is arranged in the connector 1, and the connecting component can enable the first locking component and the second locking component to synchronously lock the winding shaft 4; The connecting component includes: an elastic torsion structure and a follow-up structure.

[0044] The elastic torsion structure is arranged in the connector 1, and the elastic torsion structure can keep the first locking component in a released state for the winding shaft 4; The elastic torsion structure includes two groups of extension shafts 9 connected to the first locking component. The extension shafts 9 are provided with spiral grooves 901 along their axial directions. Specifically, the extension shafts 9 are connected to the first locking tongue 8, and the extension shafts 9 are coaxial with the rotating shaft of the first locking tongue 8. The elastic torsion structure further includes a support kit arranged inside the connector 1. A connecting sleeve 23 that slidably fits with the extension shaft 9 is connected to the support kit, and a convex shaft 2301 that slidably cooperates with the spiral groove 901 is arranged inside the connecting sleeve 23.

[0045] In the initial state, the support kit can provide a stable acting force for the connecting sleeve 23, causing it to move in the direction of the follower 7. This acting force positions the convex shaft 2301 precisely at one end of the spiral groove 901 near the follower 7. In this state, the first locking tongue 8 can remain at a position away from the abutting surface 701, ensuring that when the braided belt 2 is pulled during normal use, the first locking tongue 8 will not deflect to fit with the abutting surface 701 due to slight shaking or vibration, avoiding accidental engagement with the inner ratchet ring 10 and ensuring the normal use of the seat belt and the comfort of the driver and passengers.

[0046] However, when the driver or passenger quickly pulls the braided belt 2 in an emergency, causing the winding reel 4 to rotate at a speed exceeding the predetermined speed, the first locking tongue 8 will be subjected to a great centrifugal force. Under the action of this centrifugal force, the first locking tongue 8 can deflect relative to the follower 7 quickly and stably. As this process progresses, the extension shaft 9 will rotate correspondingly following the movement of the first locking tongue 8, enabling the convex shaft 2301 to move smoothly away from the follower 7 along the spiral groove 901. This design ensures that the first locking tongue 8 can engage with the inner ratchet ring 10 precisely and firmly, thereby achieving reliable locking of the winding reel 4 and ensuring that the braided belt 2 can effectively restrain the driver and passengers in an emergency, providing necessary protection.

[0047] At the same time, the support kit stores elastic potential energy during this process. When the emergency situation is lifted, this stored elastic potential energy will prompt the first locking tongue 8 to reset in a timely manner. At this time, the braided belt 2 can be appropriately relaxed under the drive of an external force, thus avoiding the situation where the braided belt 2 still overly restrains the driver and passengers after a vehicle collision. This feature not only protects the safety of the driver and passengers at the moment of collision but also avoids subsequent secondary injuries caused by over-tight restraint, such as restricted blood circulation in the limbs and burns to the driver and passengers caused by vehicle fire. It greatly improves driving safety. This design ensures the effectiveness and reliability of the seat belt system in various situations through precise mechanical interaction and energy management, providing comprehensive protection for the driver and passengers.

[0048] The support kit includes a transverse shaft 21 installed on the connector 1. A connecting rod 19 is slidably installed on the transverse shaft 21. A coupling 22 is rotatably installed on the connecting rod 19. The coupling 22 is rotatably connected to the connecting sleeve 23. Through the above settings, when the follower 7 rotates, it can drive the first locking tongue 8 to move. While the connecting sleeve 23 follows the rotation of the extension shaft 9, the connecting sleeve 23 can also rotate relative to the coupling 22. This setting can not only ensure the connection stability between the connecting sleeve 23 and the extension shaft 9 by following the rotation of the extension shaft 9 but also drive the first locking tongue 8 to move through the connecting sleeve 23 when the coupling 22 acts, ensuring the stability of the movement of the first locking tongue 8.

[0049] A cylindrical spring 20 is also sleeved on the horizontal axis 21. One end of the cylindrical spring 20 is connected to the connecting rod 19, and the other end is connected to the end of the connecting rod 19; The follow-up structure is connected to the elastic torsion structure and the second locking component. When the second locking component acts, the follow-up structure can drive the first locking component to act synchronously; The follow-up structure includes a hinge rod 18 rotatably connected to the connecting rod 19. A connecting plate 17 is rotatably installed at one end of the hinge rod 18 away from the connecting rod 19. A sliding connection portion 1702 is provided on the connecting plate 17, and the sliding connection portion 1702 is slidably connected to a guiding portion 1202 provided on the second locking component. Specifically, one end of the second locking tongue 14 away from its rotation axis is connected to the follow-up shaft 13, and the follow-up shaft 13 can move in an arc-shaped through groove 1201 formed in the mounting bracket 12; The follow-up structure further includes a horizontal groove 1701 provided on the connecting plate 17, and the horizontal groove 1701 is slidably matched with the follow-up shaft 13 connecting the second locking component.

[0050] In this embodiment, initially, the cylindrical spring 20 is in a moderately compressed state, ready to go, giving the connecting rod 19 a tendency to move towards the follower 7. This key setting brings twofold advantages: First, through precise regulation, the convex shaft 2301 is stably stopped at one end of the spiral groove 901 close to the follower 7, laying a solid foundation for the stability of the first locking tongue 8 during daily driving, ensuring that it is not disturbed by slight vibrations and guaranteeing the driving comfort; Second, through the delicate linkage of the hinge rod 18, the connecting plate 17 and the follow-up shaft 13, the second locking tongue 14 is cleverly separated from the outer ratchet wheel 11, maintaining the "safe distance" between them in the initial state. In this way, the single cylindrical spring 20 shoulders the heavy responsibility of synergistically controlling the first locking component and the second locking component with a clever mechanical design, simplifies the system architecture, improves the response efficiency, and injects a solid guarantee for the vehicle safety performance.

[0051] When the vehicle undergoes a sudden deceleration, the second locking tongue 14 can be deflected towards the outer ratchet wheel 11 under the drive of the steel ball 16. At this time, the second locking tongue 14 can produce a locking effect on the outer ratchet wheel 11, so that the winding shaft 4 can be locked. When the second locking tongue 14 deflects towards the outer ratchet wheel 11, the follower shaft 13 connected to it will also perform a circular motion, causing the connecting plate 17 to slide downward. At this time, the connecting plate 17 drives the connecting rod 19 to move away from the follower 7 through the hinge rod 18. During this process, the connecting rod 19 drives the first locking tongue 8 to act through the coupling shaft 22, the connecting sleeve 23, the convex shaft 2301, the extension shaft 9, and the spiral groove 901. In the above-mentioned emergency situation, the synchronous action of the first locking assembly and the second locking assembly can be realized, so that the impact force generated during the sudden stop of the winding shaft 4 can be jointly borne by the rotation shafts of the first locking tongue 8 and the second locking tongue 14, avoiding the excessive impact force borne by the first locking tongue 8 or the second locking tongue 14 due to the separate operation of the first locking assembly and the second locking assembly, resulting in fracture and unable to achieve a good locking effect. In addition, ensuring the structural integrity of the rotation shafts of the first locking tongue 8 and the second locking tongue 14 can also enable the first locking tongue 8 and the second locking tongue 14 to be reset in time after the accident is lifted, avoiding secondary injuries to the driver and passengers caused by the inability of the rotation shafts of the first locking tongue 8 and the second locking tongue 14 to be reset in time due to damage.

[0052] Of course, when the vehicle collides and the driver and passengers quickly pull the webbing 2, the first locking tongue 8 will also be deflected under the action of centrifugal force and cooperate with the inner ratchet ring 10 to lock the winding shaft 4. Similarly, during this process, the connecting rod 19 will act, and then drive the second locking tongue 14 to act, so that the second locking tongue 14 can also lock the outer ratchet wheel 11, thereby achieving a double locking effect to ensure the structural integrity at the rotation shafts of the first locking tongue 8 and the second locking tongue 14.

[0053] Based on the above settings, when the vehicle suddenly decelerates or collides, the impact force generated during the sudden stop of the winding shaft 4 can be jointly borne by the rotation shafts of the first locking tongue 8 and the second locking tongue 14, avoiding the excessive impact force borne by the first locking tongue 8 or the second locking tongue 14 due to the separate operation of the first locking assembly and the second locking assembly, resulting in fracture and unable to achieve a good locking effect. In addition, ensuring the structural integrity of the rotation shafts of the first locking tongue 8 and the second locking tongue 14 can also enable the first locking tongue 8 and the second locking tongue 14 to be reset in time after the accident is lifted, avoiding secondary injuries to the driver and passengers caused by the inability of the rotation shafts of the first locking tongue 8 and the second locking tongue 14 to be reset in time due to damage.

[0054] As an embodiment of the present invention, a pre-tightening method for a three-point emergency locking seat belt with intelligent control pre-tightening for an electric vehicle as described above is also proposed, including: when a vehicle accident occurs, the pre-tightening structure is controlled to act simultaneously when the airbag pops out, so as to tighten the webbing 2. At the same time, when the vehicle decelerates suddenly, the second locking component can drive the first locking component to act synchronously through the connecting component. At this time, the first locking component and the second locking component lock the winding shaft 4 synchronously.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claimed invention.

[0056] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-point emergency locking safety belt with intelligent control pre-tensioning for an electric vehicle, comprising: A connector (1), wherein the connector (1) has a built-in winding shaft (4), and a braided belt (2) is wound around the winding shaft (4); a pre-tightening structure connected to the winding shaft (4), the pre-tightening structure being used to drive the winding shaft (4) to reel in the braided belt (2); A first locking assembly and a second locking assembly, both of which are arranged in the connector (1), the first locking assembly being capable of locking the winding shaft (4) when a driver or passenger pulls the braided belt (2), and the second locking assembly being capable of locking the winding shaft (4) when the vehicle decelerates suddenly; It is characterized by further comprising: A connecting component is arranged in the connector (1), and the connecting component can enable the first locking component and the second locking component to synchronously lock the winding shaft (4).

2. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 1 is characterized in that: A first gear (5) and a second gear (6) are rotatably mounted on the connector (1); the first gear (5) is meshed with the second gear (6); the first gear (5) is connected to the first locking assembly; and the second gear (6) is connected to the second locking assembly.

3. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 2 is characterized in that: The first locking assembly comprises an inner ratchet ring (10) mounted on the connector (1) and a centrifugal deflection structure adapted to the inner ratchet ring (10), wherein the centrifugal deflection structure is capable of causing the winding shaft (4) and the inner ratchet ring (10) to form a locked state when the winding shaft (4) rotates.

4. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 3 is characterized in that: The centrifugal deflection structure comprises a follower (7) coaxially connected to the rotating shaft of the winding shaft (4), the follower (7) being formed with a groove, a first locking tongue (8) being rotatably mounted in the groove, the first locking tongue (8) being adapted to fit an abutment surface (701) provided on a side wall of the groove.

5. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 4, characterized in that: The second locking assembly comprises an outer ratchet (11) coaxially connected to the second gear (6) and a mounting frame (12) arranged on the connector (1), a second locking tongue (14) being rotatably mounted on the mounting frame (12), and an end of the second locking tongue (14) away from the rotation axis thereof being adapted to fit the outer ratchet (11); The second locking assembly further comprises a guide member (15) arranged in the mounting frame (12), wherein a steel ball (16) is rollingly arranged in the guide member (15), and when the steel ball (16) moves along the length direction of the guide member (15), it can drive the second locking tongue (14) to deflect toward the outer ratchet (11).

6. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 1, characterized in that: The connection component comprises: an elastic torsion structure, arranged in the connector (1), the elastic torsion structure being capable of enabling the first locking component to maintain a release state with respect to the winding shaft (4); The follower structure is connected to the elastic torsion structure and the second locking assembly, and the follower structure can drive the first locking assembly to act synchronously when the second locking assembly acts.

7. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 6, characterized in that: The elastic torsion structure comprises two groups of extension shafts (9) connected to the first locking assembly, and the extension shafts (9) are provided with spiral grooves (901) along their axial direction; The elastic torsion structure further comprises a support sleeve arranged inside the connector (1), the support sleeve being connected to a connecting sleeve (23) that is slidably fitted with the extension shaft (9), and a convex shaft (2301) that is slidably fitted with the spiral groove (901) being arranged inside the connecting sleeve (23).

8. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 7, characterized in that: The support kit comprises a transverse shaft (21) mounted on the connector (1), a connecting rod (19) being slidably mounted on the transverse shaft (21), a coupling shaft (22) being rotatably mounted on the connecting rod (19), and the coupling shaft (22) being rotatably connected to the connecting sleeve (23); A columnar spring (20) is also sleeved on the transverse axis (21), one end of the columnar spring (20) being connected to the connecting rod (19) and the other end being connected to the end of the connecting rod (19).

9. The three-point emergency locking safety belt with intelligent control pre-tensioning for electric vehicles according to claim 8, characterized in that: The follower structure comprises an articulated rod (18) rotatably connected to the connecting rod (19); a connecting plate (17) is rotatably mounted on one end of the articulated rod (18) away from the connecting rod (19); a sliding connection portion (1702) is provided on the connecting plate (17); and the sliding connection portion (1702) is slidably connected to a guide portion (1202) provided on the second locking assembly; The follower structure also includes a transverse groove (1701) provided on the connecting plate (17), and the transverse groove (1701) is slidably matched with a follower shaft (13) connected to the second locking assembly.

10. A method for pre-tightening a three-point emergency locking seat belt of an electric vehicle with intelligent control pre-tightening according to any one of claims 1 to 9, characterized in that: include: When an accident occurs in the vehicle, the airbag pops out and at the same time controls the action of the pre-tightening structure to tighten the braided belt (2). At the same time, when the vehicle decelerates suddenly, the second locking component can drive the first locking component to act synchronously through the connecting component. At this time, the first locking component and the second locking component synchronously lock the winding shaft (4).

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