Novel safety belt locking device based on non-Newtonian fluid

Abstract

The utility model discloses a novel safety belt locking device based on non-Newtonian fluid. The novel safety belt locking device is characterized by mainly comprising a belt containing groove, a bearing, a locking device cover plate, a rotating shaft, a limiting key and a locking device base. The limiting key is composed of a locking hook, a limiting magnet, a spring and a stress flat plate, and the locker base is composed of an outer wall, a liquid storage gap, a locking hole and a threaded hole. The limiting magnet is a permanent magnet and is welded on the limiting key, and the rotating shaft body is of an electromagnet structure. During use, the rotating shaft penetrates through the bearing and a central hole of the locking device cover plate, a connecting pair is arranged in a central notch of the locking device base, a shaft body part of the rotating shaft is connected with the belt containing groove, a safety belt braid is hung on the shaft body of the rotating shaft, the bearing is loaded in the central notch of the locking device cover plate, and an inner ring is welded to the rotating shaft. The locking device cover plate and the locking device base are fixed and sealed through bolts, and shear thickening type non-Newtonian fluid is poured into the base. The shaft body of the rotating shaft can be lengthened during manufacturing so as to be compatible with other traditional safety belt components such as a retractor. The utility model can realize the following functions: (1) sensitive locking of the braid; and (2) sensitive locking of the vehicle.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of core components of vehicle occupant frontal restraint system, in particular to a kind of core components of seat belt winding and locking system. BACKGROUND

[0002] In actual production and use, the traditional seat belt winding and locking system has shown good reliability, which can effectively reduce the harm to personnel due to traffic accidents and high-altitude work, but the system still has the following problems to be solved: (1) the position of the pawl and the position of the ratchet tooth need to be highly matched, otherwise serious problems such as tooth-to-tooth collision, tooth slipping and jamming are likely to occur. This puts high requirements on assembly and part stability.(2) The belt sensitive component works by centrifugal force. Whether the belt is quickly pulled out or quickly put back, it will move. Therefore, when the occupant unfastens the seat belt, there is a certain probability that the belt will be locked when it is quickly retracted under the action of the winding spring, resulting in the occupant being unable to pull out the belt the next time. This phenomenon is called Back Locking. This problem is caused by the design principle, and currently there is no good solution from the main suppliers.(3) The vehicle sensitive component is a free-moving steel ball. In vehicle movement, it is easy to produce noise due to vibration. [1] Under the current environment of better and better vehicle noise control, this problem is increasingly prominent.(4) Considering the comfort needs of passengers, the error range of the locking threshold required by the main manufacturers is becoming more and more strict. The current mechanical system cannot meet the requirements of some main manufacturers due to parts and assembly process.(5) Under the conditions of long-term use, water ingress leading to rust, etc., it is easy to cause the strength of the locking mechanism to decrease, and the parts such as steel balls, ratchets and ratchet teeth in the locker to wear out, and even the locker to malfunction. [2] (6) To adapt to the development of active safety systems, more and more main manufacturers have proposed the concept of electronic vehicle sensitivity, which senses the vehicle state through sensors and controls the trigger through actuators. The current design cannot meet the needs of this future market.

[0003] Considering the popularity of new energy vehicles worldwide, the further deepening of the intelligence, automation and networking of vehicles, the demand for developing a new safety belt locking structure that can be combined with the safety belt protection structure and adapt to the intelligence of vehicles and the development of active tensioning safety belts is further increasing. Therefore, a new type of safety belt locker that adapts to technological progress and market demand is urgently needed. SUMMARY

[0004] The utility model provides a new type of safety belt locker based on non-Newtonian fluid to make up for the defects of the prior art.

[0005] The utility model adopts the technical scheme: a new type of safety belt lock based on non-newtonian fluid, it is characterized by: mainly by the belt groove (1), bearing (2), lock cover (3), rotating shaft (4), limit key (5), lock base (6) are composed of;The limit key is by locking hook (9), limit magnet (10), spring (11) and force flat (12) are composed of;The lock base is by outer wall, liquid storage gap (11), locking hole (14) are composed of;Rotating shaft is by shaft body (13), connecting pair (8) are composed of;Limit magnet (10) is permanent magnet, is welded on limit key (5), rotating shaft shaft body (13) is electromagnet structure;When using, rotating shaft (4) passes through bearing (2) and lock cover (3) central hole, connecting pair (8) is placed in the central slot of lock base (6), rotating shaft shaft body (13) part is connected with belt groove (1), safety belt webbing is hung on rotating shaft shaft body (13), bearing (2) is loaded in the central slot of lock cover (3), inner ring is welded with rotating shaft (4), lock cover (3) is fixed with lock base (6) with bolt and seals, and the lock base (6) is internally perfused with shear thickening type non-newtonian fluid.

[0006] The limit key locking hook (9) is engaged with the locking hole (14) in the locking state. Advantages

[0007] The lock has the following advantages: (1) simple structure, few parts, most of which can be manufactured by casting; large tolerance range, low precision requirement of parts, economical and practical. (2) when the webbing is impacted, the rotating shaft can provide strong counterforce and release a small displacement (the fluid still has a small displacement when shear thickening effect occurs) at this time the webbing is similar to a spring with extremely high stiffness coefficient, which can convert the rigid impact on the passenger's chest caused by the existing lock design into a flexible impact, reducing the damage to the passenger's body caused by the safety belt constraint. (3) increase the active constraint link, which can be used with intelligent vehicles (4) high system integration, good sealing performance, not easy to rust (5) cancel the ratchet-pawl engagement system, which is more wear-resistant and durable BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is an overall structure explosion view of a new type of safety belt lock based on non-newtonian fluid

[0009] Figure 2 It is an isometric view of a new type of safety belt lock based on non-newtonian fluid

[0010] Figure 3 It is an isometric view of a new type of safety belt lock based on non-newtonian fluid (hidden belt holder, lock cover, bearing)

[0011] Figure 4 A working structure plan view of a new type of safety belt lock based on non-Newtonian fluid (unlocked state)

[0012] Figure 5 A working structure sectional view of a new type of safety belt lock based on non-Newtonian fluid

[0013] Figure 6 A working structure plan view of a new type of safety belt lock based on non-Newtonian fluid (locked state) DETAILED DESCRIPTION

[0014] The utility model will be explained in detail below in combination with the drawings and specific embodiments, but not as the limitation of the utility model.

[0015] As shown in the legend, a new type of safety belt lock based on non-Newtonian fluid is characterized in that it is mainly composed of a belt placing groove (1), a bearing (2), a lock cover plate (3), a rotating shaft (4), a limiting key (5) and a lock base (6). The limiting key is composed of a locking hook (9), a limiting magnet (10), a spring (11) and a force flat plate (12). The lock base is composed of an outer wall, a liquid storage gap (11) and a locking hole (14). The rotating shaft is composed of a shaft body (13) and a connecting pair (8). The limiting magnet (10) is a permanent magnet and is welded on the limiting key (5). The rotating shaft body (13) is an electromagnet structure. When in use, the rotating shaft (4) passes through the center hole of the bearing (2) and the lock cover plate (3), the connecting pair (8) is placed in the central slot of the lock base (6), the rotating shaft body (13) is connected with the belt placing groove (1), the safety belt is hung on the rotating shaft body (13), the bearing (2) is loaded in the central slot of the lock cover plate (3), the inner ring is welded with the rotating shaft (4), the lock cover plate (3) is fixed and sealed with the lock base (6) by bolts, and the lock base (6) is filled with shear thickening type non-Newtonian fluid. The limiting key locking hook (9) is engaged with the locking hole (14) in the locked state.

[0016] The working process of the utility model is as follows:

[0017] The fabric belt sensitive locking. When the fabric belt is pulled by a person, there are three possibilities: (1) when the fabric belt is slowly pulled out, the rotating shaft rotates at a low speed, the limiting key moves at a low speed, the non-Newtonian fluid has a low viscosity, and the fluid has a weak force on the stressed plate, which is not enough to push the limiting key to the meshing position with the locking hole, so the fabric belt can be smoothly pulled out. (2) When the fabric belt is quickly pulled out, the rotating shaft rotates at a high speed, the limiting key moves at a high speed, the non-Newtonian fluid is subjected to increased shear force, the fluid viscosity increases, the relative speed of the stressed plate and the fluid increases, and under the dual action of the increased viscosity and the increased relative speed, the force on the stressed plate increases, pushing the limiting key to move inward, so that the locking hook can hook the locking hole on the lock base, preventing the fabric belt from continuing to stretch. When the force on the fabric belt disappears, the locking hook and the lock disengage, and under the action of the spring, the limiting key returns to the initial position, allowing the fabric belt to continue to stretch. (3) When the fabric belt is subjected to a great impact force (for example, a car collides with a front obstacle), the rotating shaft speed suddenly increases, the speed and acceleration of the limiting key suddenly increase, and due to the shear thickening property of the non-Newtonian fluid, the force of the non-Newtonian fluid on the stressed plate and the connecting pair suddenly increases, the reaction force on the connecting pair also suddenly increases to a maximum value, and at the same time, the limiting key is suddenly ejected and engaged with the locking hole, preventing the fabric belt from stretching out, so as to firmly fix the occupant on the seat.

[0018] Vehicle sensitive locking. When the vehicle detects a dangerous situation in front or the vehicle suddenly brakes, the sensor corresponds, so that the rotating shaft is energized to form an electromagnet, the magnetic pole of the rotating shaft near the lock base is opposite to the limiting magnetic pole, the electromagnetic repulsive force makes the limiting key pop out and engage with the locking hole, fixing the occupant on the seat.

[0019] The utility model is not limited to the above-mentioned specific embodiments. The skilled in the art to which the utility model belongs can make various modifications, supplements or substitutions with similar ways to the described specific embodiments, without deviating from the spirit of the utility model or exceeding the scope defined by the appended claims, all of which are within the scope of the utility model claimed.

Claims

1. A new type of seat belt retractor based on non-Newtonian fluid, characterized in that: Mainly by the belt slot (1), bearing (2), lock cover (3), rotating shaft (4), limit key (5), lock base (6) is composed of; limit key by locking hook (9), limit magnet (10), spring (7) and force plate (15) is composed of; lock base by the outer wall, liquid gap (11), locking hole (14) is composed of; rotating shaft by the shaft (13), connecting pair (8) is composed of; limit magnet (10) is a permanent magnet, welded on the limit key (5), rotating shaft shaft (13) is an electromagnet structure; in use, rotating shaft (4) through the bearing (2) and lock cover (3) center hole, connecting pair (8) is placed in the lock base (6) central slot, rotating shaft shaft (13) part and belt slot (1) is connected, the seat belt webbing is hung on the rotating shaft shaft (13), bearing (2) is loaded in the lock cover (3) central slot, inner ring and rotating shaft (4) welding, lock cover (3) and lock base (6) with bolt sealing, lock base (6) inside perfusion shear thickening type non newtonian fluid.

2. A new type of seat belt retractor based on non-Newtonian fluid according to claim 1, characterized in that: Limit key lock hook (9) in the locking state, will be engaged with the locking hole (14).

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