Automatic fastening and unfastening device and automatic fastening and unfastening method for automobile safety belt based on track movement

Abstract

An automobile safety belt automatic fastening and unfastening device based on track movement and a fastening and unfastening method are characterized in that a movable track is arranged below the inner wall of an automobile center pillar, passes through the lower side of an automobile door to the lower portion of an automobile instrument panel and then extends to an arc-shaped area of an automobile middle partition, a movable sliding block is installed in the movable track, and a movable hanging pin is hooked on the movable sliding block; the movable sliding block is driven by a driving mechanism to move back and forth along the movable track; a hanging pin fixing buckle is arranged at the tail end of the movable rail, the movable hanging pin is driven by the movable sliding block to move along the movable rail until the movable hanging pin reaches the tail end of the movable rail at the middle partition position of the automobile, and then the universal hook on the movable hanging pin is automatically inserted into the hanging pin fixing buckle installed at the tail end of the movable rail to form the automatic lock catch of the automobile safety belt. The movable hanging pin is driven by the movable sliding block to move along the movable track arranged in the automobile and bypass the body of an automobile driver or a front-row passenger, safety belt locking can be automatically conducted on the front-row passenger or the driver, the operation range can be effectively expanded, the safety belt locking device is suitable for application of various crowds, the occupied space is small, and the safety belt locking device is convenient to use. Implementation is easy, and operation is reliable.

Description

Technical Field

[0001] The invention relates to an automatic fastening and releasing method and device for automobile safety belts, in particular to an automatic fastening and releasing device and an automatic fastening and releasing method for automobile safety belts based on track movement, belonging to the technical field of automobile safety belts. Background Art

[0002] Car seat belts are safety devices that are designed to restrain passengers in the event of a collision or accident, and to prevent passengers from having a secondary collision with the steering wheel and dashboard, or from being thrown out of the car and causing death or injury in the event of a collision or accident. Car seat belts, also known as seat belts, are a type of restraint device for drivers and passengers. Car seat belts are recognized as the cheapest and most effective safety device. Many countries require the installation of seat belts in vehicles, and also require that drivers and passengers wear seat belts when the vehicle is in operation.

[0003] The most widely used three-point seat belt is currently a type of seat belt that combines practicality, comfort and occupant restraint quite well among all kinds of seat belts. A three-point seat belt is a three-point seat belt equipped with a retractor. This type of retractor is called an emergency locking retractor or an automatic locking retractor, and the seat belt can usually be pulled out freely. It is equipped with an impact sensing device that can lock the seat belt in the event of a collision or emergency braking. Generally, the impact is sensed by the deceleration of the vehicle, and some are sensed by the pulling speed of the webbing. The combination of the two methods has become the mainstream. When unfastening the seat belt, it is now necessary to manually pull the active buckle from one side of the human body around the body and insert it into the hook fixed buckle set on the other side of the human body; but now many drivers and passengers find this very troublesome, so in many cases they are reluctant to unfasten the seat belt, which brings hidden dangers to driving. Recently, some inventors have also proposed technical solutions for automatically fastening seat belts. Among them, a telescopic automatic seat belt fastening method that can be put into practical application is to extend a hard arc block from the bottom of the seat to drive the movable buckle to bypass the upper part of the abdomen and insert it into the hook fixing buckle set at the middle position. However, this method has some problems and has not been widely used. Therefore, up to now, there is no feasible technical solution that can truly realize automatic fastening of seat belts, and it is very necessary to improve it.

[0004] After searching, no relevant patent technology literature has been found. The closest patent literatures are as follows: 1. The Chinese patent number is CN201120245324.3, and the utility model patent is named "Automatic fastening and unfastening device for automobile safety belts". The patent discloses an automatic fastening and unfastening device for automobile safety belts, including a safety belt conveying and returning mechanism, a short track telescopic mechanism, an anti-clip clothing baffle telescopic mechanism, and a locking tongue and a hanging pin wedging and separation mechanism. The safety belt conveying and returning mechanism is composed of a webbing, a retractor, a hanging pin, a locking tongue, a conveying motor, a returning motor, a beaded steel rope, a track and a lock buckle. The locking tongue and the hanging pin wedging and separation mechanism is composed of a hanging pin, a locking tongue, a hanging pin card, and an anti-clip clothing baffle telescopic mechanism. This patent is a technical solution for automatically fastening and unfastening automobile safety belts developed by the inventor of the present application in the early stage. Although it involves proposing some basic principles of the present application, it encounters many problems in the specific implementation, especially the use of two motors and two steel wire ropes to connect the two sides of the hanging pin respectively, and the two sets of motor steel wire ropes are used to pull the hanging pin to move on the track, which is difficult to operate and control, and the moving position is not easy to ensure.

[0005] 2. Patent application number CN201010193043.8, entitled "Automobile safety belt automatic fastening and unfastening device", discloses an automotive safety belt automatic fastening and unfastening device, one end of the safety belt is installed on the inner side of the seat headrest, and the other end is installed on the chassis on the same side of the seat, the lock head is suspended on the safety belt and inserted into the lock seat to maintain constant connection, the lock seat is installed on the door through a threaded rod, and the electric motor drives the threaded rod to rotate forward and reverse, so that the lock seat moves forward and backward to fasten and unfasten the safety belt. This technical solution does not really realize the automatic unfastening of the seat belt, and still needs to be operated manually, but the lock tongue is locked electrically, so it cannot solve the above-mentioned problems.

[0006] 3. Patent number CN202120432878.8, the utility model patent named "A fully automatic fastening and unfastening device for automobile seat belts", the patent discloses a fully automatic fastening and unfastening device for automobile seat belts, including a seat chassis, a motor is installed at the center of one side of the seat chassis, the output end of the motor is installed with a first right-angle gear through a coupling, and the middle position of the seat chassis near the bottom of one side of the motor is installed with overlapping semicircular tracks, and supports are installed on both sides of the bottom of the inner surface of the overlapping semicircular tracks. This technical solution is currently the closest to practical application, but the defect of this patent is that the arc of extension is fixed as mentioned above, and it is difficult to meet the requirements for drivers and passengers who are too fat, because this technical solution must rely on the size of the arc to determine the range of adaptation, and this extension mechanism is installed under the seat, the space at the bottom of the seat is extremely limited, and it is difficult to achieve a large arc extension mechanism, and this extension mechanism forms a hard stop, which is easy to cause harm, so it does not solve the above-mentioned problems.

[0007] From the description of the above patents, it can be seen that although some people have proposed improved technical solutions for the automatic release of automobile seat belts, which also include the basic content of the technical solution of the present invention, these improved technical solutions are not practical. The patent CN201120245324.3, which is closest to the present application, is previously applied by the inventor himself. However, the following problems are found in the actual application of this patent: 1. The use of dual motors and two steel wire ropes to pull the movable hook to move is not only complex in structure, but also difficult to control, unstable in operation, and prone to operational failures; 2. The use of a dual-motor system not only increases the cost of the entire system, but also takes up a large space and is inconvenient to install and disassemble; 3. Although the built-in track is used, the structure is simple, but there is a lack of rollers, the moving slider does not move smoothly, and it is easy to get stuck; 4. The webbing comes out from a hanging pin and there is no movable retractor structure, so it is difficult to pull out the webbing.

[0008] Therefore, the problems mentioned above still exist and need to be further studied. Summary of the invention

[0009] The present invention is aimed at a series of technical problems existing in the above-mentioned automatic fastening and releasing method of automobile seat belts, and proposes a method that can effectively solve the problems of unstable operation of a moving slider, complex traction mechanism, easy failure, etc., and proposes an automatic fastening and releasing device and a fastening and releasing method for automobile seat belts based on track movement; the automatic fastening and releasing device and the fastening and releasing method for automobile seat belts based on track movement can effectively solve the shortcomings of the current automatic fastening and releasing method of automobile seat belts, such as unstable operation, limited scope of application, complex structure, and easy failure.

[0010] In order to achieve this purpose, the present invention provides an automatic fastening and unfastening device for automobile safety belts based on track movement, wherein a moving track is arranged below the inner wall of the center pillar of the automobile, passes through the bottom of the door to under the automobile instrument panel, and then extends to the arc-shaped area of ​​the center partition of the automobile, a moving slider is installed in the moving track, and a movable hanging pin is hooked on the moving slider; the moving slider is driven by a driving mechanism to move back and forth along the moving track; a hanging pin fixing buckle is arranged at the end of the moving track, and the movable hanging pin is driven by the moving slider to move along the moving track until it reaches the end of the moving track at the center partition position of the automobile, and the universal hook on the movable hanging pin is automatically inserted into the hanging pin fixing buckle installed at the end position of the moving track to form an automatic locking buckle of the automobile safety belt; the moving track is circular A tubular built-in moving track, a moving track guide groove is opened on the upper part of the moving track, and the moving slider moves along the track in the circular inner wall of the built-in moving track; the moving slider is a shuttle-shaped structural member, and the moving slider moves back and forth on the inner wall of the moving track and the moving track guide groove on the upper part; the two ends of the wire rope are respectively connected to the front and rear of the moving slider, and the middle of the wire rope is wound on a bidirectional drive mechanism; the parts connected to the two sides of the wire rope and the moving slider are guided and positioned by a fixed pulley set, so that the moving slider and the wire rope form a fixed-length closed-loop back-and-forth moving mechanism, and the active hook pin is driven by the forward and reverse rotation of the driving mechanism to move back and forth from the head end to the end of the moving track along the moving track to achieve locking or unlocking of the safety belt.

[0011] Preferably, the driving mechanism includes a driving motor and a winding wheel. The winding wheel is tightly mounted on the driving motor shaft and driven by the driving motor to rotate in both directions. A spiral groove is provided on the winding wheel. The middle part of the wire rope is wound on the spiral groove of the winding wheel. The wire rope is driven to move in both directions through the bidirectional rotation of the winding wheel.

[0012] Preferably, the driving motor is installed on a ball sliding track, and the front end part of the motor shaft is provided with a moving screw, which is screwed into a nut support fixed on the center partition frame of the vehicle. As the motor rotates, the winding wheel and the driving motor are driven to move as a whole on the ball track through the cooperation of the moving screw and the nut support, ensuring that the wire rope is always in a straight line position on the fixed pulley when it enters and exits.

[0013] Preferably, the fixed pulley group includes a U-shaped fixed pulley arranged at the turning point of the moving track, and the U-shaped fixed pulley helps the wire rope to move along the turning of the moving track; a first guide fixed pulley is arranged on the outside of the hook pin fixing buckle at the end of the moving track, and the wire rope is pulled by the first guide fixed pulley to drive the movable hook pin lock tongue buckle to be inserted into the hook pin fixing buckle; guiding and steering tensioning fixed pulley groups are respectively arranged at both ends of the winding wheel on the driving motor, and the tensioning fixed pulley group is used to ensure that the middle part of the wire rope is always evenly wound on the winding wheel.

[0014] Preferably, the tensioning fixed pulley group includes a slidable tensioning fixed pulley matched with the first guide fixed pulley and a second guide fixed pulley group matched with the winding wheel for positioning. The wire rope passes through two sets of tensioning fixed pulleys and winding positioning pulleys to ensure that the wire rope can be wound on the winding wheel with appropriate tightness.

[0015] Preferably, the movable slider includes a movable slider body, a movable buckle and a movable guide block; the movable guide blocks are arranged at the axial ends of the movable slider body, and are connected to the two ends of the movable slider body through steel wire ropes, and the two ends of the steel wire ropes pass through the movable guide blocks respectively, and then are fixed on the steel wire rope locking buckles at the two ends of the movable slider body; the movable buckle includes a rotatable pin ring and a pin ring seat, the pin ring is screwed on the pin ring shaft of the pin ring seat in a rotating manner, and is a rotatable movable pin ring, and the pin ring seat is fixed to the upper end surface of the movable slider body through a buckle fastener.

[0016] Preferably, the movable track is formed by bending a round tube, and is bent into an arc-shaped track according to the shape of the center pillar island, the front desk of the instrument panel and the middle partition surface of the car. The track returns 180 degrees at the end of the movable track to form a return bend, so that when the movable slider moves to the end of the movable track, it is automatically clamped by the hook pin fixing buckle; the upper part of the round tube of the movable track is provided with a movable track guide rail groove for the movable slider to move out, and the movable belt buckle on the movable slider extends out of the track, connects to the movable hook pin, and drives the movable hook pin to move back and forth along the movable track under the traction of the wire rope; a groove or hole is provided on the inner side surface of the turning part of the movable track, and a steering positioning guide wheel for guiding the wire rope is arranged in the groove or hole to reduce the friction of the wire rope when it is bent.

[0017] The present invention also proposes a method for automatically fastening and releasing a car seat belt based on a track-moving automatic fastening and releasing device for a car seat belt, wherein a moving track is arranged from the inner wall of the car center pillar to under the car instrument panel and then extends to the car center partition; a moving slider is installed in the track, and the moving slider is driven by a driving mechanism and moves back and forth along the moving track by the traction of a steel wire rope, and drives a movable hook pin to move back and forth along the moving track during the back and forth movement; after the movable hook pin is driven by the moving slider and moves along the moving track to the end of the moving track at the car center partition position, the universal hook on the movable hook pin is automatically inserted into the hook pin fixing buckle installed at the end position of the moving track, thereby automatically releasing the car seat belt.

[0018] Preferably, the movable slider is driven by a driving mechanism by inserting the movable slider into the movable track, and the two ends of the movable slider are respectively connected to the two ends of the wire rope to form a closed loop; the middle of the wire rope is wound on a winding wheel, and the winding wheel is installed on the driving motor, through the bidirectional rotation of the driving motor, the rotation of the wire rope on the winding wheel is utilized to pull the movable slider back and forth in the movable track, and the moving trajectory of the wire rope is controlled by the fixed pulley, so that the wire rope can be evenly wound on the winding wheel, and the movable slider can be pulled back and forth along the trajectory determined by the fixed pulley and the movable track.

[0019] The beneficial technical effects of the present invention are: The present invention drives the movable hook pin to move along the movable track set in the car by moving the slider, bypassing the body of the car driver or the front seat passenger, and can automatically lock the seat belt of the driver and passenger in the front seat, which has the following advantages: 1. The present invention uses a steel wire rope to be connected to both ends of the moving slider to form a closed moving circle, so that under the guidance of the fixed pulley and the moving track, the moving slider can be pulled by the same steel wire rope to achieve smooth sliding operation; 2. The present invention uses a motor for bidirectional driving, and winds the middle part of the wire rope around the winding wheel of the driving motor. The sliding of the moving slider is pulled by the rotation of the same wire rope, which greatly simplifies the overall control and avoids the problem of two motors being out of sync. 3. The present invention adopts a circular moving track and installs the moving slider in the pipeline of the moving track, so that the moving slider and the wire rope are hidden in the pipeline, which will not cause a great impact on the outside, greatly reducing the probability of accidents caused by the external track, and making the appearance of the entire device more beautiful; 4. A 180-degree bend is used at the end of the moving track, so that when the moving slider moves to the end, it can be automatically locked by the hook pin. At this time, the webbing cannot move forward, forming a conventional seat belt locking state, which can effectively prevent the moving slider from automatically returning; 5. The present invention adopts a shuttle-shaped moving slider, and rollers are arranged on the sides of the moving slider and the guide slider, and guide rollers are also arranged at the turning point, which effectively reduces the resistance of the moving slider to slide on the track in the pipeline and increases the smoothness of the sliding of the moving slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixed hanging pin structure of the present invention; Figure 3 This is a schematic diagram of the combined structure of the movable slider and the movable track of the present invention; Figure 4 It is a schematic diagram of the structure of the combination of the hanging pin mechanism and the moving track of the present invention; Figure 5 This is a schematic diagram of the structure of the movable slider of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the movable slider in the movable track of the present invention; Figure 7 This is a schematic diagram of the structure of the mobile track of the present invention; Figure 8 This is a schematic diagram of the movable hanging pin structure of the present invention; Fig. 9 It is a schematic diagram of the structure of the retractor of the present invention; Fig.10 It is a schematic diagram of the structure of the driving mechanism of the present invention; Fig.11 It is a schematic diagram of the tensioning fixed pulley structure of the present invention.

[0021] In the figure: 1, fixed hanging pin, 2, webbing, 3, retractor, 4, tensioning fixed pulley group, 5, driving motor component, 6, movable hanging pin, 7, moving slider, 8, moving track, 9, hanging pin mechanism, 10, first guide fixed pulley, 11, second guide fixed pulley group, 12, wire rope, 13, double nut self-locking mechanism, 14, fixed hanging pin bracket, 15, upper plane bearing, 16, lower plane bearing, 17, fixed hanging pin connecting bolt, 18, fixed hanging pin body, 19, fixed hanging pin roller, 20, fixed hanging pin roller fixing pin, 21, fixed hanging pin upper frame, 22, universal hook, 23, automatic untying mechanism, 24, self-locking nut, 25, spindle bearing, 26, spindle fixing nut, 27, moving slider fixed vertical axis, 28, moving slider spindle, 29, moving slider arc roller, 30, wire rope lock buckle, 31, moving slider guide shuttle head, 32, Moving slider body, 33 moving slider bearing, 34, fixing plate, 35, rolling wheel small shaft, 36 moving track track surface, 37, movable hanging pin roller, 38, movable hanging pin frame, 39, movable hanging pin roller pin shaft, 40, movable hanging pin lock tongue buckle, 41, rolling pin shaft assembly, 42, retractor body, 43, automobile body, 44, retractor body fixing bolt assembly, 45, retractor body plane bearing, 46, retractor bracket, 47 , U-shaped fixed pulley, 48, movable track guide groove, 49, hanging pin fixing buckle, 50, track limit block, 51, driving motor, 52, winding wheel, 53, ball nut, 54, ball screw, 55, ball nut fixing bracket, 56, ball guide rail, 57, tensioning fixed pulley, 58, tensioning fixed pulley limit block, 59, tensioning fixed pulley sliding guide rail, 60, tensioning spring bracket, 61, tensioning spring, 62, ash leakage port. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Embodiment 1

[0023] As attached Figure 1-11 As shown, an automatic fastening and releasing device for a car seat belt based on track movement, the automatic fastening and releasing device for a car seat belt comprises a hanging pin mechanism 9, a webbing 2, a retractor 3 and an automatic unfastening mechanism 23; wherein, a moving track 8 is arranged below the inner wall of the center pillar of the car, passes through the bottom of the car door to the bottom of the car dashboard, and then extends to the arc-shaped area of ​​the car middle partition, a moving slider 7 is installed in the moving track 8, and a movable hanging pin 6 of the car seat belt is hooked on the moving slider 7; the moving slider 7 is driven by a driving motor component 5 to move back and forth along the moving track 8; a hanging pin fixing buckle 49 is arranged at the end of the moving track 8, and the movable hanging pin 6 is driven by the moving slider 7 to move along the moving track 8 until it reaches the end of the moving track at the position of the car middle partition, and the universal hook 22 on the movable hanging pin 6 is automatically inserted into the hanging pin fixing buckle 49 installed at the end position of the moving track to form an automatic locking buckle of the car seat belt; a 180-degree return bend is adopted at the end of the moving track 8, so that when the moving slider moves to the end, it can automatically The movable track 8 is a cylindrical built-in movable track, and a movable track guide groove 48 is provided on the upper part of the movable track 8, and the movable slider 7 moves back and forth along the track track in the circular inner wall of the cylindrical built-in movable track; a wire rope lock 30 connected to the wire rope 12 is respectively arranged before and after the movable slider 7, and the two ends of the wire rope 12 are locked and tied to the wire rope lock 30, and the middle of the wire rope 12 is wound on the driving motor component 5 driven in both directions; the wire rope 12 is guided and positioned by the fixed pulley group, so that the movable slider 7 and the wire rope 12 form a fixed length closed loop back and forth moving mechanism, and the active hanging pin is driven by the forward and reverse rotation of the driving mechanism along the cylindrical tube of the cylindrical built-in movable track 8, and moves back and forth from the head end of the movable track 8 to the end to realize the locking or unlocking of the safety belt.

[0024] The pin mechanism 9 includes a fixed pin 1 and a movable pin 6; the webbing 2 is retracted in the retractor 3, and the middle of the webbing 2 passes through the movable pin roller 37 of the movable pin 6 to be divided into an upper and a lower part, and the upper and lower parts respectively pass through the upper and lower fixed pins 1 and return to the retractor 3; the seat belt is pulled by the movable pin 6 to bypass the driver and passengers along the trajectory determined by the automatic unfastening mechanism, and the movable pin lock tongue buckle 40 of the movable pin 6 is inserted into the pin fixed buckle 49 to realize the unfastening of the car seat belt.

[0025] Plane bearings are designed on the upper and lower fixed hanging pins 1, so they can change direction smoothly when the webbing 2 is pulled out; and the upper and lower fixed hanging pins 1 and the movable hanging pin 6 are respectively provided with a fixed hanging pin roller 19 and a movable hanging pin roller 37, and the fixed hanging pin roller 19 and the movable hanging pin roller 37 are respectively mounted on the fixed hanging pin roller fixed pin 20 or the movable hanging pin roller pin shaft 39, so when the webbing 2 is pulled out, the length of the webbing 2 can also be automatically adjusted; at the same time, a fixed hanging pin upper frame 21 is provided on the upper part of the fixed hanging pin body 18 of the fixed hanging pin 1, and the upper and lower parts of the fixed hanging pin upper frame 21 are respectively provided There are an upper plane bearing 15 and a lower plane bearing 16, which are strung together by a fixed hanging pin connecting bolt 17 and fastened by a double nut self-locking mechanism 13 to form a freely rotatable hanging pin, and the fixed hanging pin 1 is fixed to the vehicle body by a fixed hanging pin bracket 14; a rotatable movable hanging pin lock tongue buckle 40 is installed on the movable hanging pin frame 38 of the movable hanging pin 6 through a rolling pin shaft combination 41, and the movable hanging pin roller 37 is also installed on the movable hanging pin frame 38 through a movable hanging pin roller pin shaft, and the movable hanging pin lock tongue buckle 40 is buckled on the universal hook 22 of the movable slider 6.

[0026] The retractor 3 includes a retractor body 42, a retractor bracket 46 and a retractor body fixing bolt assembly 44; the retractor body 42 is mounted on the retractor bracket 46, and the retractor bracket 46 is fixed to the vehicle body 43 through the retractor body fixing bolt assembly 44, and a retractor body plane bearing 45 is arranged between the retractor body fixing bolt assembly 44 and the retractor bracket 46 and the vehicle body 43, and the retractor body plane bearing 45 can make the retractor 3 rotate more flexibly.

[0027] The automatic release mechanism includes a moving track 8, a moving slider 7, a traction wire rope 12, a driving motor component 5, and a positioning guide component; wherein the moving track 8 is formed by bending a round tube, and the bending shape is bent according to the layout structure in the car, and the starting point is arranged at the lower part of the fixed hanging pin 1 at the lower dead point, extending from the lower part of the middle pillar of the car, passing through the lower side of the front door of the car to the lower part of the front panel of the car, and around the partition between the two seats of the car, until the back of the partition is located at the lower rear side of the other side of the car seat, forming a track with an arc structure; the moving track A hanging pin fixing buckle 49 is designed at the tail end of the track 8; a moving track guide groove 48 for the moving slider 7 to move is opened above the round tube of the moving track 8; the structure of the curve of the moving track 8 and the U-shaped fixed pulley 47 is designed at the curve of the track, and the U-shaped fixed pulley 47 is designed to reduce the friction when the wire rope 12 moves in contact in the moving track 8, so that the wire rope 12 can smoothly drag the moving slider 7 to move; an ash leakage port 62 is provided at the bottom of the moving track 8, so that the dust falling into the moving track can be automatically leaked out through the ash leakage port.

[0028] The movable slider 7 includes a movable slider body 32, a universal hook 22, an automatic release mechanism 23, a self-locking nut 24, a spindle bearing 25, a spindle fixing nut 26, a movable slider fixing vertical axis 27, a movable slider spindle 28, a movable slider arc roller 29, a wire rope lock 30, a movable slider guide shuttle head 31, a movable slider bearing 33, a fixing plate 34, a rolling wheel small shaft 35, and a movable track track surface 36; wherein the movable slider body 32 of the movable slider 7 is 1-3 pie-shaped disc bodies, the size of the disc matches the tubular inner diameter of the movable track 8; spaced apart on the radial outer circle of each cylinder There is a notch, 3-4 arc rollers 29 with hanging pins are installed on the notch, a vertical shaft 27 and a main shaft 28 are installed on the cylinder, a set of moving slider bearings 33 are sleeved on the vertical shaft 27, and the moving slider bearings 33 are just stuck in the moving track notch 48 to prevent the moving slider from being stuck in the moving track notch 48 when moving in the moving track 8; a universal hook 22 is connected to the main shaft 28, and the universal hook 22 is loosely sleeved on the main shaft 28 through the main shaft bearing 25, the main shaft fixing nut 26 and the self-locking nut 24, and the vertical shaft 27 and the main shaft 28 are connected together through the fixing plate 34 to form an integral moving slider body 32. A wire rope lock 30 is provided at both ends of the moving slider body 32, and a moving slider guide shuttle head 31 is connected to each other through a wire rope, and the wire rope 12 passes through the middle of the moving slider guide shuttle head 31 and is connected to the wire rope lock 30, and a set of arc roller wheels 29 are also provided on the outer circumference of each moving slider guide shuttle head 31. All the arcuate roller wheels 29 are mounted on the moving slider body 32 or the moving slider guide shuttle head 31 through the roller shaft 35 , so that the arcuate roller wheels 29 are closely attached to the moving track surface 36 of the moving track 8 .

[0029] The driving motor component 5 includes a driving motor 51, a track limit block 50, a winding wheel 52, a ball nut 53, a ball screw 54, a ball nut fixing bracket 55, and a ball guide rail 56; the driving motor 51 is installed on the ball guide rail 56, and can move back and forth along the ball guide rail 56 within the range of the track limit block 50, and a winding wheel 52 is installed on the main shaft of the driving motor 51, and a spiral groove for winding a wire rope is provided on the winding wheel 52, and the wire rope 12 is evenly wound around the winding wheel 52 according to the sequence of the spiral groove; a ball screw 54 is provided on the side of the winding wheel 52, and the ball screw 54 is screwed in the ball nut 53, and the ball nut 53 is fixedly installed on the ball nut fixing bracket 55, and the ball nut fixing bracket 55 is fixed on the vehicle body. When the driving motor 51 drives the winding wheel 52 to rotate, the ball screw 54 rotates together, and while rotating, the driving motor 51 is driven to move back and forth on the ball guide rail 56 under the action of the ball nut 53 to ensure that the position of the wire rope 12 on the winding wheel is fixed relative to the fixed steering positioning pulley 11 of the tensioning fixed pulley group 4. This can ensure that the wire rope 12 can rotate evenly on the winding wheel, thereby realizing the pulling effect of the wire rope 12 on the moving slider 7. The wire rope wound on the winding wheel 52 is only wound around half of the width of the winding wheel 52. When the driving motor 51 drives the winding wheel 52 to rotate, the wire rope 12 also rotates and moves axially on the winding wheel, and moves through the axis of the winding wheel 52 to ensure that the position of the wire rope 12 pulled on both sides is always in the original position and perpendicular to the axis of the winding wheel to be pulled to the fixed steering positioning pulley 11. This can ensure that the pulling force of the wire rope 12 is always uniform, and the axial movement of the winding wheel 52 is achieved by the threaded cooperation of the ball screw 54 and the ball nut 53 on the side of the winding wheel 52. The pitch of the threaded cooperation of the ball screw 54 and the ball nut 53 is equal to the pitch of the spiral groove on the winding wheel 52, that is, when the winding wheel rotates one circle, the threaded cooperation of the ball screw 54 and the ball nut 53 makes the winding wheel move axially by the pitch of the winding wheel.

[0030] The positioning guide assembly includes a first guide fixed pulley 10 and a tensioning fixed pulley group 4; the first guide fixed pulley 10 is installed behind the hook pin fixing buckle 49 at the end of the moving track 8, and the traction wire rope 12 is pulled by the first guide fixed pulley 10 to drive the active hook pin lock tongue buckle 40 on the moving slider to be inserted into the hook pin fixing buckle 49 and locked; when manually unlocking, the unlocking device of the active hook pin lock tongue 40 (the same as the conventional seat belt unlocking device, not shown in the figure) can be pressed to unlock.

[0031] The tensioning fixed pulley group 4 has two groups, which are respectively arranged on both sides of the driving motor 51 to ensure that the wire rope can be stably and evenly wound on the winding wheel 52; the tensioning fixed pulley group 4 includes a fixed steering positioning pulley 11 and an elastic tensioning fixed pulley 57; the fixed steering positioning pulley 11 is fixed on the vehicle body and is located on both sides of the winding wheel 52. The fixed steering positioning pulley 11 mainly sends the wire rope 12 to both sides of the winding wheel 52 through steering positioning to ensure that the wire rope 12 is wound on the winding wheel 52 in an orderly manner; in the fixed A tensioning fixed pulley 57 is respectively arranged between the fixed steering positioning pulley 11 and the head end of the movable track 8 and the first guide fixed pulley 10. The tensioning fixed pulley 57 is installed on the tensioning fixed pulley sliding guide rail 59. The tensioning fixed pulley 57 can move back and forth along the tensioning fixed pulley sliding guide rail 59; and the tensioning force of the wire rope 12 is maintained by the tensioning spring 61 to ensure the smooth operation of the wire rope 12; one end of the tensioning spring 61 is fixed on the tensioning fixed pulley 57, and the other end is installed on the vehicle body through the tensioning spring bracket 60.

[0032] The steel wire rope 12 is a whole steel wire rope, one end of which is fixed to the steel wire rope buckle 30 on one side of the moving slider 7, and the other end is fixed to the steel wire rope buckle 30 on the other side of the moving slider. The middle part of the steel wire rope 12 is wound on the winding wheel 52. The rotation of the winding wheel 52 drives the steel wire rope 12 to move back and forth on the track path defined by the fixed pulley block and the moving track, and the movement of the steel wire rope 12 involves the movement of the moving slider 7, and then the moving slider 7 hooks the movable hook pin 6 and moves, thereby realizing the automatic release of the car seat belt.

[0033] The working principle of the present invention is as follows: when the switch is pressed or when the car reaches a certain speed, a signal is transmitted through the speed sensor, and the motor 51 starts to work. Since the winding wheel 52 is fixed to the motor shaft on one side and fixed to the ball screw 54 on the other side; the two ends of the wire rope 12 are respectively connected to the two sides of the winding wheel 52, so when the motor 51 rotates one circle, it will drive the winding wheel 52 and the ball screw 54 to rotate one circle together. Due to the action of the ball screw 54 and the ball nut 53, the winding wheel 52 and the motor 51 will also be driven and moved forward or backward by a certain distance (the pitch of the ball screw 54), and the wire rope 12 will be smoothly wound around the winding wheel 52, and the other end will be returned to the line; since the webbing 2 passes through the movable hanging pin 6, the movable hanging pin 6 is matched with the universal hook 22, and the universal hook 22 is sleeved on the hanging pin main shaft bearing 25, and can rotate The two hanging pin guide wheels 31 are connected with the wire rope 12, so when the motor 51 is working, the webbing 2 is pulled out and moved along with the movable hanging pin 6 together with the moving slider 7 due to the movement of the wire rope 12. When moving at the bend of the moving track 8, each bend is designed with a plurality of U-shaped fixed pulleys 47, so the wire rope 12 can move smoothly along the direction of the moving track 8, to the bottom of the steering wheel, to the middle partition, and reach the hanging pin fixing buckle 49. Through the action of the displacement switch or the light-controlled switch, the motor 51 stops working, and the middle and lower parts of the universal hook 22 are supported by the hanging pin fixing buckle 49 to ensure that the movable hanging pin 6 will not move forward again due to external force; the webbing 2 is automatically tied to the driver and passengers, and the excess length is recovered from the upper dead point fixed hanging pin 1 and the lower dead point fixed hanging pin 1 into the retractor 3 to complete the lacing process. When unbuckling, the switch is pressed, the motor 51 starts to reverse, the movable hook pin 6 and the movable slider 7 return to the starting point of the webbing 2 through the movement of the wire rope 12, and the webbing 2 also returns to the starting point with the movable hook pin 6, and the excess webbing is respectively recovered from the upper dead point fixed hook pin 1 and the lower dead point fixed hook pin 1 into the retractor 3, completing the process of unbuckling the seat belt.

[0034] The present invention also designs a manual belt release mechanism, which is realized by the engagement and separation mechanism of the movable hook pin 6 and the movable slider 7. When the vehicle has an accident and the movable track 8 is deformed or the circuit fails, the driver can press the movable lock tongue buckle 40 to disengage the movable hook pin 6 from the universal hook 22. The driver releases the movable hook pin 6, and the webbing 2 returns to the starting point with the movable hook pin 6. The excess webbing will be recovered from the upper dead point fixed hook pin 1 and the lower dead point fixed hook pin 1 into the retractor 3 respectively. The process of unbuckling the seat belt is completed.

[0035] What needs further explanation is: based on the above-mentioned device, a method for automatically fastening and releasing a car seat belt based on a track-moving automatic fastening and releasing device for car seat belts is also proposed. A moving track is set from the inner wall of the car center pillar to under the car dashboard, and then extends to the car center partition; a moving slider is installed in the track, and the moving slider is driven by a driving mechanism. It moves back and forth along the moving track by the traction of a steel wire rope, and drives the movable hook pin to move back and forth along the moving track during the back and forth movement; the movable hook pin is driven by the moving slider, and after it moves along the moving track to the end of the moving track at the car center partition position, the universal hook on the movable hook pin is automatically inserted into the hook pin fixing buckle installed at the end of the moving track, thereby automatically releasing the car seat belt.

[0036] Preferably, the movable slider is driven by a driving mechanism by inserting the movable slider into the movable track, and the two ends of the movable slider are respectively connected to the two ends of the wire rope to form a closed loop; the middle of the wire rope is wound on a winding wheel, and the winding wheel is installed on the driving motor, through the bidirectional rotation of the driving motor, the rotation of the wire rope on the winding wheel is utilized to pull the movable slider back and forth in the movable track, and the moving trajectory of the wire rope is controlled by the fixed pulley, so that the wire rope can be evenly wound on the winding wheel, and the movable slider can be pulled back and forth along the trajectory determined by the fixed pulley and the movable track.

[0037] The beneficial technical effects of the above embodiments are: The present invention drives the movable hook pin to move along the movable track set in the car by moving the slider, bypassing the body of the car driver or the front seat passenger, and can automatically lock the seat belt of the driver and passenger in the front seat, which has the following advantages: 1. The present invention uses a steel wire rope to be connected to both ends of the moving slider to form a closed moving circle, so that under the guidance of the fixed pulley and the moving track, the moving slider can be pulled by the same steel wire rope to achieve smooth sliding operation; 2. The present invention uses a motor for bidirectional driving, and winds the middle part of the wire rope around the winding wheel of the driving motor. The sliding of the moving slider is pulled by the rotation of the same wire rope, which greatly simplifies the overall control and avoids the problem of two motors being out of sync. 3. The present invention adopts a circular moving track and installs the moving slider in the pipeline of the moving track, so that the moving slider and the wire rope are hidden in the pipeline, which will not cause a great impact on the outside, greatly reducing the probability of accidents caused by the external track, and making the appearance of the entire device more beautiful; 4. A 180-degree bend is cleverly used at the end of the moving track, so that when the moving slider moves to the end, it can be automatically locked by the hook pin. At this time, the webbing cannot move forward, forming a conventional seat belt locking state, which can effectively prevent the moving slider from automatically returning; 5. The present invention adopts a shuttle-shaped moving slider, and rollers are arranged on the sides of the moving slider and the guide slider, which effectively reduces the resistance of the moving slider sliding on the track in the pipeline and increases the smoothness of the sliding of the moving slider.

[0038] It should be noted that the above-listed embodiments are only used to clearly and completely describe the technical solutions of the present invention in combination with the accompanying drawings; obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the present invention without substantial change in the technical content. At the same time, the structure, proportion, size, etc. illustrated in the drawings of the specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that can be achieved by the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

Claims

1. An automatic fastening and unfastening device for automobile safety belts based on track movement, wherein a moving track is arranged below the inner wall of the automobile center pillar, passes through the lower side of the door, reaches below the automobile instrument panel, and then extends to the arc-shaped area of ​​the automobile center partition, a moving slider is installed in the moving track, and a movable hanging pin is hooked on the moving slider; the moving slider is driven by a driving mechanism to move back and forth along the moving track; a hanging pin fixing buckle is arranged at the end of the moving track, and the movable hanging pin is driven by the moving slider to move along the moving track until it reaches the end of the moving track at the automobile center partition position, and the universal hook on the movable hanging pin is automatically inserted into the hanging pin fixing buckle installed at the end of the moving track to form an automatic locking buckle of the automobile safety belt; the characteristics are: The movable track is a circular tubular built-in movable track, and a movable track guide groove is opened on the upper part of the movable track, and the movable slider moves along the track in the circular inner wall of the built-in movable track; the movable slider is a shuttle-shaped structural member, and the movable slider moves back and forth on the inner wall of the movable track and the movable track guide groove on the upper part; the two ends of the wire rope are respectively connected to the front and rear of the movable slider, and the middle of the wire rope is wound on a bidirectional drive driving mechanism; the parts connected to the two sides of the wire rope and the movable slider are guided and positioned by a fixed pulley set, so that the movable slider and the wire rope form a fixed-length closed-loop back-and-forth moving mechanism, and the active hook pin is driven by the forward and reverse rotation of the driving mechanism to move back and forth from the head end of the movable track to the end end along the movable track to achieve locking or unlocking of the safety belt.

2. The track-based automatic fastening and unfastening device for automobile safety belts according to claim 1, characterized in that: The driving mechanism includes a driving motor and a winding wheel. The winding wheel is tightly sleeved on the driving motor shaft and driven by the driving motor to rotate in both directions. A spiral groove is provided on the winding wheel. The middle part of the wire rope is wound on the spiral groove of the winding wheel. The bidirectional rotation of the winding wheel drives the wire rope to move in both directions.

3. The track-based automatic fastening and unfastening device for automobile safety belts according to claim 2, characterized in that: The driving motor is installed on the ball sliding track, and the front end part of the motor shaft is provided with a moving screw, which is screwed into a nut support fixed on the center frame of the vehicle. As the motor rotates, the winding wheel and the driving motor are driven to move as a whole on the ball track through the cooperation of the moving screw and the nut support, ensuring that the wire rope is always in a straight line position of the fixed pulley when it enters and exits.

4. The track-based automatic fastening and unfastening device for automobile safety belts according to claim 1, characterized in that: The fixed pulley group includes a U-shaped fixed pulley arranged at the turning point of the moving track, and the U-shaped fixed pulley helps the wire rope to move along the turning point of the moving track; a first guide fixed pulley is arranged on the outside of the hook pin fixing buckle at the end of the moving track, and the wire rope is pulled by the first guide fixed pulley to drive the movable hook pin lock tongue buckle to be inserted into the hook pin fixing buckle; guiding and steering tensioning fixed pulley groups are respectively arranged at both ends of the winding wheel on the driving motor, and the tensioning fixed pulley group is used to ensure that the middle part of the wire rope is always evenly wound on the winding wheel.

5. The track-based automatic fastening and unfastening device for automobile safety belts according to claim 3, characterized in that: The tensioning fixed pulley group includes a slidable tensioning fixed pulley matched with the first guide fixed pulley and a second guide fixed pulley group matched with the winding wheel for winding positioning. The wire rope passes through two sets of tensioning fixed pulleys and winding positioning pulleys to ensure that the wire rope can be wound on the winding wheel with appropriate tightness.

6. The track-based automatic fastening and unfastening device for automobile safety belts according to claim 1, characterized in that: The movable slider includes a movable slider body, a movable buckle and a movable guide block; the movable guide blocks are arranged at the axial ends of the movable slider body, and are connected to the two ends of the movable slider body through steel wire ropes, and the two ends of the steel wire ropes pass through the movable guide blocks respectively, and then are fixed on the steel wire rope locking buckles at the two ends of the movable slider body; the movable buckle includes a rotatable pin ring and a pin ring seat, the pin ring is screwed on the pin ring shaft of the pin ring seat in a rotating manner, and is a rotatable movable pin ring, and the pin ring seat is fixed to the upper end surface of the movable slider body through a buckle fastener.

7. The track-based automatic fastening and unfastening device for automobile safety belts according to claim 6, characterized in that: The movable slider body and movable guide block are circular cake structures, and rollers are embedded around the circular cake body in the radial direction so that the movable slider can slide on the inner surface of the tubular movable track; the movable slider body is a single block or a combination of multiple blocks; the movable guide block is provided with a shuttle-shaped guide head at the outer end to ensure that the wire rope can smoothly drive the movable slider.

8. The track-based automatic fastening and unfastening device for automobile safety belts according to claim 6, characterized in that: The movable track is formed by bending a round tube, and is bent into an arc-shaped track according to the shape of the center pillar island, the front desk of the instrument panel and the middle partition surface of the car. It returns 180 degrees at the end of the movable track to form a return bend; the upper part of the round tube of the track is provided with a movable track guide rail groove for the movable slider to move and extend, and the movable buckle on the movable slider extends out of the track, connects to the movable hanging pin, and drives the movable hanging pin to move back and forth along the movable track under the traction of the wire rope; a groove or hole is provided on the inner side surface of the turning part of the movable track, and a steering positioning guide wheel for guiding the wire rope is arranged in the groove or hole. When the wire rope passes through a bend, it rolls on the guide roller to reduce the friction of the wire rope when passing through a bend.

9. A method for automatically fastening and releasing a car seat belt using the automatic fastening and releasing device for car seat belts based on track movement as described in claim 1, wherein a moving track is set from the inner wall of the car center pillar to under the car dashboard and then extends to the car center partition; a moving slider is installed in the track, and the moving slider is driven by a driving mechanism and moves back and forth along the moving track by the traction of a steel wire rope, and drives a movable hook pin to move back and forth along the moving track during the back and forth movement; after the movable hook pin is driven by the moving slider and moves along the moving track to the end of the moving track at the car center partition position, the universal hook on the movable hook pin is automatically inserted into the hook pin fixing buckle installed at the end of the moving track, thereby automatically releasing the car seat belt.

10. The method for automatically fastening and unfastening a vehicle safety belt according to claim 2, characterized in that: The movable slider is driven by a driving mechanism, and the movable slider is inserted into the movable track, and the two ends of the movable slider are respectively connected to the two ends of the wire rope to form a closed loop; the middle of the wire rope is wound on a winding wheel, and the winding wheel is installed on the driving motor. Through the bidirectional rotation of the driving motor, the rotation of the wire rope on the winding wheel is utilized to pull the movable slider back and forth in the movable track, and the moving trajectory of the wire rope is controlled by the fixed pulley, so that the wire rope can be evenly wound on the winding wheel, and the movable slider can be pulled bidirectionally to move back and forth along the trajectory determined by the fixed pulley and the movable track.

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