An automatic belt threading mechanism and a vehicle seat belt assembly device

Abstract

This invention relates to the field of automotive manufacturing technology, specifically an automatic webbing mechanism and automotive seat belt assembly equipment. The mechanism includes an assembly frame and several leveling rollers, with multiple sets located at two points on the assembly frame, arranged equidistantly along the length of the assembly frame. Multiple component clamping stations on the assembly frame are used to clamp a winding device, an upper guide, and a locking tongue, with a webbing structure located at each clamping station of the upper guide and the locking tongue. The webbing structure includes two clamping plates movably mounted on the assembly frame, which can approach each other and move along the length of the assembly frame to pull the webbing towards the upper guide or the locking tongue. Ultimately, during the webbing process, the length of the unclamped portion of the webbing end can be controlled within a small range, avoiding the problem of the webbing bending and failing to be threaded smoothly due to its excessive length and flexibility.

Description

Technical Field

[0001] This invention relates to the field of automotive manufacturing technology, specifically an automatic seatbelt fastening mechanism and automotive seatbelt assembly equipment. Background Technology

[0002] As an indispensable means of transportation in modern society, automobiles have drastically changed people's travel patterns and lifestyles. Seat belts are a crucial component of automotive safety systems. By securely restraining passengers in their seats during collisions or sudden braking, they effectively reduce the risk of injury due to inertia. Furthermore, working in conjunction with devices such as airbags, they further mitigate impact forces and improve survival rates in accidents.

[0003] Car seat belts mainly consist of components such as webbing, retractor, upper guide, latch and buckle, and fasteners. The webbing is the main body of the seat belt, used to restrain passengers in the event of a collision; the retractor controls the extension and retraction of the webbing, ensuring it provides sufficient length when needed; the upper guide and latch work together to guide the webbing through correctly and lock it in place; the fasteners securely connect the various parts of the seat belt to the vehicle structure, ensuring the stability of the entire system.

[0004] Both the upper guide and the locking tongue have elongated openings for the webbing to pass through. During the assembly of the car seat belt, the portion of the webbing that is reserved on the retractor needs to be pulled out from the retractor and then passed through the elongated openings on the upper guide and the locking tongue in sequence. Then the webbing is connected to the fastener to complete the assembly of the seat belt.

[0005] However, because the elongated slots on the upper guide and locking tongue are designed to accommodate the flat shape of the webbing, their size is only slightly larger than the cross-section of the webbing, making the slots relatively narrow. This makes it difficult for the puller to pass through these elongated slots smoothly. Furthermore, since the webbing needs to pass through two elongated slots (one on the upper guide and one on the locking tongue), sufficient length needs to be left at the end of the webbing when threading it through. However, considering the flexibility of the seatbelt, it is difficult to maintain sufficient straightness at the end of the webbing pulled from the retractor when attempting to thread it through these elongated slots. Therefore, when the end of the webbing reaches the upper guide, it tends to bend, failing to pass smoothly through the upper guide and locking tongue, leading to threading failure. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic seatbelt fastening mechanism and an automotive seatbelt assembly device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automatic strapping mechanism includes an assembly frame and further includes:

[0009] The leveling rollers are provided in multiple sets at two locations on the assembly frame, and the multiple leveling rollers at each location are arranged at equal intervals along the length of the assembly frame to drive the webbing along the length of the assembly frame.

[0010] Multiple component clamping stations are located on the assembly frame, which are used to clamp the take-up retractor, the upper guide and the locking tongue respectively, and each of the clamping stations of the upper guide and the locking tongue is provided with a set of strap-threading structure.

[0011] The webbing structure includes two clamps movably mounted on the assembly frame. The two clamps can approach each other and move along the length of the assembly frame to pull the webbing upwards to the guide or locking tongue.

[0012] It also includes a clamping guide structure on the assembly frame, which can clamp and pull the end of the webbing that passes through the upper guide or locking tongue, and connect the webbing to a leveling roller located away from the take-up unit.

[0013] As a further embodiment of the present invention: an mounting plate is fixed on the assembly frame, and two guide grooves are symmetrically provided on the mounting plate. The leveling roller includes movable seats that are slidably fitted into the two guide grooves and first circular rollers that are rotatably mounted on the two movable seats. When the webbing is threaded, the two first circular rollers are located on both sides of the webbing.

[0014] As a further embodiment of the present invention: a drive motor is installed on the side of the movable seat away from the first roller, the output end of the drive motor is connected to the rotation shaft of the first roller, the two first rollers can rotate synchronously but in different directions, and a first cylinder is also fixed on the mounting plate, the movable end of the first cylinder is fixedly connected to the movable seat.

[0015] As a further embodiment of the present invention: the two clamping plates are respectively connected to a set of driving structures provided on the assembly frame. The driving structure includes a guide rail fixed on the assembly frame and a movable seat slidably fitted on the guide rail. The guide rail is arranged along the length direction of the assembly frame, and the movable seat can slide along the guide rail.

[0016] The movable seat is fixedly connected to a fixed plate, a second cylinder is fixed on the fixed plate, and the clamping plate is fixedly installed on the movable end of the second cylinder.

[0017] As a further embodiment of the present invention: the clamping and guiding structure includes:

[0018] Two assembly plates fixed on the assembly frame;

[0019] Two sliders are slidably disposed on the assembly plate and a plurality of second rollers are movably disposed on the assembly plate via a driven component. Each of the two sliders is connected to a set of clamping components.

[0020] Wherein, the axial length of the second roller is less than the width of the webbing, and the power component on the assembly frame can drive the two sliders to move along the length direction of the assembly frame so that the clamping assembly can clamp and pull the part of the webbing exposed above the upper guide or locking tongue. When the driven component is triggered, it can cause the second roller to move toward the webbing.

[0021] As a further embodiment of the present invention: the power component includes a sliding component slidably disposed on the assembly frame, the sliding component being fixed to the two sliders via a follower arm, and a third cylinder being fixed on the assembly frame, the movable end of the third cylinder being fixed to the sliding component.

[0022] As a further embodiment of the present invention: the clamping assembly includes a guide plate fixed to the slider, a telescopic plate slidably fitted with the guide plate, and a clamping member fixed to the telescopic plate at the end away from the slider. A fourth cylinder is also fixed to the side of the guide plate, and the movable end of the fourth cylinder is fixed to the telescopic plate.

[0023] The clamping member is arranged in an "L" shape and includes a first straight edge and a second straight edge connected together.

[0024] As a further embodiment of the present invention: the driven component includes a driven plate slidably disposed on the assembly plate, a plurality of second rollers rotatably mounted on the driven plate, and a plurality of elastic support members are provided between the driven plate and the assembly plate;

[0025] The elastic support includes a guide post fixed to the assembly plate and a cylindrical spring sleeved on the outer periphery of the guide post. The guide post passes through and is fixed to a protruding block on the driven plate and is slidably connected to the protruding block. The two ends of the cylindrical spring are respectively connected to the protruding block and the assembly plate.

[0026] The driven plate is also fixed with a limiting strip, which abuts against a roller on the slider. The limiting strip has a connected flat surface and an inclined surface.

[0027] As a further embodiment of the present invention: the assembly frame is provided with an electric telescopic arm, a first electric push rod and a second electric push rod in sequence along the length direction, and the tail ends of the three are respectively equipped with a first clamp, a second clamp and a third clamp;

[0028] The first clamp, the second clamp, and the third clamp are used to clamp and fix the winding device, the upper guide, and the locking tongue, respectively, forming the winding device clamping station, the upper guide clamping station, and the locking tongue clamping station.

[0029] An automotive seatbelt assembly device includes the aforementioned automatic belt-threading mechanism.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] By setting multiple first rollers closely arranged along the length of the assembly frame, the conveying function of the webbing is realized. By applying pressure through the two first rollers on both sides of the webbing, the webbing can be flattened, avoiding the problem that the flatness of the webbing end is not good due to creases, which would make it difficult to pass through the upper guide and locking tongue smoothly later.

[0032] Furthermore, based on the linear speed control of the first roller, the length of the unclamped portion of the webbing away from the take-up device after it is clamped by the two clamping plates can be precisely controlled, making this portion shorter. This overcomes the problem that when the safety belt passes through the upper guide or locking tongue, the unclamped portion is too long, and due to the flexibility of the webbing, the tail end of the webbing is prone to bending when it reaches the upper guide, making it unable to pass smoothly through the upper guide and locking tongue, resulting in failure of the belt threading operation.

[0033] Secondly, by setting up an "L"-shaped clamping member and a second circular roller with an axial length smaller than the width of the webbing, the webbing can be smoothly and effectively connected after passing through the upper guide and continue to pass through the locking tongue, realizing continuous webbing. Moreover, the length of the unclamped part of the webbing end can be controlled within a small range during the two webbing processes, avoiding the problem of the webbing bending during webbing due to its excessive length and its own softness, which prevents it from being webbing smoothly. Attached Figure Description

[0034] Figure 1 An isometric view of one embodiment of an automatic belt-threading mechanism.

[0035] Figure 2 This is a schematic diagram of one embodiment of an automatic belt-threading mechanism.

[0036] Figure 3 This is a structural schematic diagram of another embodiment of the automatic belt-threading mechanism.

[0037] Figure 4 This is a structural schematic diagram of another embodiment of the automatic belt-threading mechanism from another angle.

[0038] Figure 5 This is a front view of one embodiment of an automatic belt-threading mechanism.

[0039] Figure 6This is a side view of one embodiment of an automatic belt-threading mechanism.

[0040] Figure 7 for Figure 2 Enlarged view of the structure at point A in the middle.

[0041] Figure 8 for Figure 5 Enlarged view of the structure at point B.

[0042] Figure 9 This is an exploded view of the structure of the leveling roller in one embodiment of the automatic belt-threading mechanism.

[0043] Figure 10 This is a schematic diagram of the clamping guide structure in one embodiment of the automatic strapping mechanism.

[0044] Figure 11 This is an exploded view of the clamping guide structure in one embodiment of the automatic belt-threading mechanism.

[0045] In the diagram: 1. Assembly frame; 2. Mounting plate; 201. Guide groove; 3. Movable seat; 4. First cylinder; 5. Drive motor; 6. First roller; 7. Electric telescopic arm; 8. First clamp; 9. First electric push rod; 10. Second electric push rod; 11. Second clamp; 12. Third clamp; 13. Guide rail; 14. Movable seat; 15. Fixed plate; 16. Second cylinder; 17. Clamping plate; 18. Third cylinder; 19. Sliding component; 2 0. Assembly plate; 2001. Slide rail; 21. Follower arm; 22. Slider; 2201. Roller; 23. Fourth cylinder; 24. Guide plate; 25. Telescopic plate; 26. Clamping component; 2601. First straight edge; 2602. Second straight edge; 27. Driven plate; 2701. Protruding block; 28. Guide post; 29. ​​Limiting strip; 2901. Flat surface; 2902. Inclined surface; 30. Second circular roller; 31. Blowing device. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0048] Please see Figures 1-11 In this embodiment of the invention, an automatic strapping mechanism includes an assembly frame 1, and further includes:

[0049] The leveling rollers are provided in multiple sets at two locations on the assembly frame 1, and the multiple leveling rollers at each location are arranged at equal intervals along the length of the assembly frame 1 to drive the webbing along the length of the assembly frame 1.

[0050] Multiple component clamping stations are provided on the assembly frame 1, which are used to clamp the winding device, the upper guide and the locking tongue respectively, and a set of strapping structure is provided at the clamping stations of the upper guide and the locking tongue.

[0051] The webbing structure includes two clamps 17 movably mounted on the assembly frame 1. The two clamps 17 can approach each other and move along the length of the assembly frame 1 to pull the webbing upward to the guide or locking tongue.

[0052] It also includes a clamping guide structure on the assembly frame 1, which can clamp and pull the end of the webbing that passes through the upper guide or locking tongue, and connect the webbing to a leveling roller located away from the take-up unit.

[0053] It should be noted that, in actual production, the webbing mechanism needs to be equipped with a winding device, an upper guide, and a locking tongue transmission line. Before webbing, multiple component clamping stations work together with each transmission line to take the winding device, upper guide, and locking tongue, so that the winding device, upper guide, and locking tongue are arranged along the length of the assembly frame 1. The connection between the three forms the webbing travel path during the webbing process.

[0054] Please refer to it again. Figure 9The mounting frame 1 is fixed with a mounting plate 2, and the mounting plate 2 is symmetrically provided with two guide grooves 201. The leveling roller includes a movable seat 3 that is slidably fitted into the two guide grooves 201 and a first circular roller 6 that is rotatably mounted on the two movable seats 3. When threading the webbing, the two first circular rollers 6 are located on both sides of the webbing. A drive motor 5 is installed on the side of the movable seat 3 away from the first circular roller 6. The output end of the drive motor 5 is connected to the rotation shaft of the first circular roller 6. The two first circular rollers 6 can rotate synchronously but in opposite directions. A first cylinder 4 is also fixed on the mounting plate 2, and the movable end of the first cylinder 4 is fixedly connected to the movable seat 3.

[0055] It should be noted that the two first rollers 6 located at one point in the direction of the webbing travel are respectively located on both sides of the webbing. During operation, the first cylinder 4 can drive the movable seat 3 to move the first rollers 6 toward the webbing until the two first rollers 6 apply a certain pressure to the webbing. Then, the two first rollers 6 rotate synchronously but in different directions, thereby allowing the webbing to be conveyed.

[0056] It should be noted that the multiple first rollers 6 are closely arranged along the length of the assembly frame 1. In this way, after the end of the webbing reserved on the take-up device is located between the two first rollers 6, the multiple first rollers 6 along the length of the assembly frame 1 move closer to the webbing in sequence. Through the conveying of the multiple first rollers 6, the end of the webbing gradually approaches the two clamps 17. The axial length of the first rollers 6 is not less than the width of the webbing. By applying pressure from the two first rollers 6 on both sides of the webbing, the webbing can be flattened, avoiding the problem that the flatness of the webbing end is poor due to creases, which would make it difficult to pass smoothly through the upper guide and locking tongue later.

[0057] Please refer to it again. Figure 5 and Figure 8 The two clamping plates 17 are respectively connected to a set of driving structures provided on the assembly frame 1. The driving structure includes a guide rail 13 fixed on the assembly frame 1 and a movable seat 14 slidably fitted on the guide rail 13. The guide rail 13 is arranged along the length direction of the assembly frame 1, and the movable seat 14 can slide along the guide rail 13. The movable seat 14 is fixedly connected to a fixing plate 15, and a second cylinder 16 is fixed on the fixing plate 15. The clamping plates 17 are fixedly installed on the movable end of the second cylinder 16.

[0058] Specifically, a threaded drive assembly is installed on the assembly frame 1. The threaded drive assembly includes a lead screw rotatably mounted on the assembly frame 1 and passing through the movable seat 14. The lead screw is threadedly connected to the movable seat 14 and equipped with a drive motor. The drive motor drives the lead screw to rotate, so that the movable seat 14 and the lead screw can be threadedly engaged. Then, the movable seat 14 can slide along the guide rail 13. Before the movable seat 14 moves, the webbing is conveyed to a specific length by the first roller 6, that is, after the length of the webbing exposed on the side of the first roller 6 facing the clamping plate 17 is slightly greater than the length of the clamping plate 17, the second cylinder 16 drives the clamping plate 17 to move toward the webbing until the webbing is clamped by the two clamping plates 17. Then, the movable seat 14 begins to move, and the two clamping plates 17 can pull the webbing upward to the guide or locking tongue. The moving speed of the movable seat 14 is consistent with the conveying speed of the first roller 6 to the webbing.

[0059] Please refer to it again. Figure 7 , Figure 10 as well as Figure 11 The clamping guide structure includes:

[0060] Two assembly plates 20 are fixed to the assembly frame 1;

[0061] Two sliders 22 are slidably disposed on the assembly plate 20 and a plurality of second rollers 30 are movably disposed on the assembly plate 20 via a driven component. Each of the two sliders 22 is connected to a set of clamping components.

[0062] Wherein, the axial length of the second roller 30 is less than the width of the webbing, and the power component on the assembly frame 1 can drive the two sliders 22 to move along the length direction of the assembly frame 1 so that the clamping assembly can clamp and pull the part of the webbing exposed above the upper guide or locking tongue. When the driven component is triggered, it can cause the second roller 30 to move toward the webbing.

[0063] Furthermore, a slide rail 2001 is fixed on the assembly plate 20, and the slider 22 is slidably fitted into the slide rail 2001 to guide the slider 22.

[0064] The power component includes a sliding member 19 slidably mounted on the assembly frame 1. The sliding member 19 is fixed to the two sliders 22 via a follower arm 21. A third cylinder 18 is also fixed on the assembly frame 1, and the movable end of the third cylinder 18 is fixed to the sliding member 19. The clamping assembly includes a guide plate 24 fixed to the sliders 22, a telescopic plate 25 slidably fitted with the guide plate 24, and a clamping member 26 fixed to the end of the telescopic plate 25 away from the sliders 22. A fourth cylinder 23 is also fixed to the side of the guide plate 24, and the movable end of the fourth cylinder 23 is fixed to the telescopic plate 25. The clamping member 26 is L-shaped and includes a first straight edge 2601 and a second straight edge 2602 connected together.

[0065] During the webbing process, taking the webbing passing through the upper guide as an example, the clamp 17 and the clamp 26 are located on both sides of the upper guide. Through the pulling of the clamp 17, the end of the webbing passes through the long strip-shaped opening on the upper guide.

[0066] It should be noted that, since the length of the webbing protruding from the first roller 6 towards the clamping plate 17 is controlled to be slightly greater than the length of the clamping plate 17, the length of the webbing protruding from the clamping plate 17 towards the upper guide is smaller during this process. Therefore, it can ensure that the webbing passes through the long strip-shaped opening of the upper guide more stably, avoiding the problem that the tail end of the webbing is prone to bending when it reaches the upper guide due to the softness of the webbing and the long unclamped part, and thus cannot pass through the upper guide smoothly.

[0067] After the webbing passes through the upper guide, the fourth cylinder 23 drives the clamping member 26 to move toward the webbing. The first straight edge 2601 clamps the exposed part of the webbing end. It should be emphasized that the distance between the end faces of the two first straight edges 2601 on the same side of the webbing is less than the width of the webbing and greater than the axial length of the second roller 30. Subsequently, the clamping plate 17 releases the clamping state of the webbing, the third cylinder 18 works, the sliding member 19 moves along the length direction of the assembly frame 1, and drives the two sliders 22 to move synchronously through the follower arm 21. The clamping member 26 can then pull the webbing. Similarly, the pulling speed of the clamping member 26 on the webbing is consistent with the conveying speed of the first roller 6 on the webbing.

[0068] Then, the webbing can pass between the second rollers 30 on the two mounting plates 20. Subsequently, the driven component is triggered, driving the second rollers 30 to move toward the webbing and applying a certain pressure to the webbing. The clamping member 26 releases the clamp on the webbing. Similarly to the first roller 6, the second rollers 30 located on both sides of the webbing rotate synchronously but in different directions (each second roller 30 is equipped with a corresponding drive motor) to realize the conveying of the webbing. Subsequently, a leveling roller located away from the take-up unit connects with the webbing and performs a leveling process on the webbing before it passes through the locking tongue.

[0069] Please refer to it again. Figure 7 and Figure 10 The driven component includes a driven plate 27 slidably disposed on the assembly plate 20, a plurality of second rollers 30 rotatably mounted on the driven plate 27, and a plurality of elastic support members are provided between the driven plate 27 and the assembly plate 20; the elastic support member includes a guide post 28 fixed on the assembly plate 20 and a cylindrical spring sleeved on the outer periphery of the guide post 28, the guide post 28 passes through a protrusion 2701 fixed on the driven plate 27 and is slidably connected to the protrusion 2701, and the two ends of the cylindrical spring are respectively connected to the protrusion 2701 and the assembly plate 20;

[0070] The driven plate 27 is also fixed with a limiting strip 29, which abuts against the roller 2201 provided on the slider 22. The limiting strip 29 is provided with a connected flat surface 2901 and an inclined surface 2902.

[0071] Furthermore, when the clamping member 26 pulls the webbing, that is, when the slider 22 moves along the length of the assembly frame 1, before the clamping member 26 reaches the end of its stroke, the roller 2201 rolls on the flat surface 2901. In the latter part of the stroke of the clamping member 26, the roller 2201 rolls onto the inclined surface 2902. Consequently, the limiting strip 29 causes the driven plate 27 to give way. Correspondingly, the protruding block 2701 slides toward the assembly plate 20, the cylindrical spring is compressed, and the driven plate 27 drives the second roller 30 to move toward the webbing. The second roller 30 applies the pressure required for conveying the webbing.

[0072] Please refer to it again. Figure 1 The assembly frame 1 is provided with an electric telescopic arm 7, a first electric push rod 9 and a second electric push rod 10 in sequence along the length direction, and the tail ends of the three are respectively equipped with a first clamp 8, a second clamp 11 and a third clamp 12; wherein, the first clamp 8, the second clamp 11 and the third clamp 12 are used to clamp and fix the winding device, the upper guide and the locking tongue, respectively forming the winding device clamping station, the upper guide clamping station and the locking tongue clamping station.

[0073] Specifically, in actual assembly, the side of this mechanism is equipped with a winding device, an upper guide, and a latch transmission line. The electric telescopic arm 7 can drive the first clamp 8 to move to the winding device transmission line to pick up the winding device. Similarly, the first electric push rod 9 drives the second clamp 11 to move to the upper guide transmission line to pick up the upper guide. The second electric push rod 10 drives the third clamp 12 to move to the latch transmission line to pick up the latch. Through programming, orderly control is achieved, realizing the automated assembly of the seat belt.

[0074] In addition, it should be added that, since a coil spring is installed inside the winding machine, after the webbing has passed smoothly through the upper guide and locking tongue, and the first roller 6 and the second roller 30 have released the pressure on the webbing, in order to prevent the webbing from automatically rewinding due to the action of the coil spring, in actual assembly, the unloading mechanism (i.e. the mechanism used to remove the assembled seat belt from this threading mechanism) should be equipped with at least two clamping points. One clamping point is used to clamp the winding machine, and the other clamping point is used to clamp the end of the webbing away from the winding machine to prevent the webbing from automatically rewinding. Subsequently, the unloading mechanism transfers the assembled seat belt to the next processing step, and a fixing component is added to the end of the webbing away from the winding machine.

[0075] Secondly, after the first clamp 8 completes the take-up of the winding device, in order to ensure that the webbing reserved on the winding device can be smoothly pressured and conveyed by the first roller 6, a blowing device 31 is provided at one end of the assembly frame 1. The blowing device 31 can blow air onto the webbing, thereby guiding the webbing into the space between the two first rollers 6 on the mounting plate 2.

[0076] As another embodiment of the present invention, an automotive seat belt assembly device is also proposed, including the aforementioned automatic belt-fastening mechanism.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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. An automatic strapping mechanism, comprising an assembly frame; Its features are, Also includes: The leveling rollers are provided in multiple sets at two locations on the assembly frame, and the multiple leveling rollers at each location are arranged at equal intervals along the length of the assembly frame to drive the webbing along the length of the assembly frame. Multiple component clamping stations are located on the assembly frame, which are used to clamp the take-up retractor, the upper guide and the locking tongue respectively, and each of the clamping stations of the upper guide and the locking tongue is provided with a set of strap-threading structure. The webbing structure includes two clamps movably mounted on the assembly frame. The two clamps can approach each other and move along the length of the assembly frame to pull the webbing upwards to the guide or locking tongue. It also includes a clamping guide structure on the assembly frame, which can clamp and pull the end of the webbing that passes through the upper guide or locking tongue, and connect the webbing to a leveling roller located away from the take-up unit. The mounting frame is fixed with a mounting plate, and the mounting plate is symmetrically provided with two guide grooves. The leveling roller includes movable seats that are slidably fitted into the two guide grooves and first round rollers that are rotatably mounted on the two movable seats. When the webbing is threaded, the two first round rollers are located on both sides of the webbing. The two clamps are respectively connected to a set of drive structures provided on the assembly frame. The drive structure includes a guide rail fixed on the assembly frame and a movable seat slidably fitted on the guide rail. The guide rail is arranged along the length direction of the assembly frame, and the movable seat can slide along the guide rail. The movable seat is fixedly connected to a fixed plate, a second cylinder is fixedly fixed on the fixed plate, and the clamping plate is fixedly installed on the movable end of the second cylinder; The clamping guide structure includes: Two assembly plates fixed on the assembly frame; Two sliders are slidably disposed on the assembly plate and a plurality of second rollers are movably disposed on the assembly plate via a driven component. Each of the two sliders is connected to a set of clamping components. Wherein, the axial length of the second circular roller is less than the width of the webbing, and the power component on the assembly frame can drive the two sliders to move along the length direction of the assembly frame so that the clamping assembly can clamp and pull the part of the webbing exposed by the upper guide or locking tongue. When the driven component is triggered, it can cause the second circular roller to move toward the webbing. The clamping assembly includes a guide plate fixed to the slider, a telescopic plate slidably fitted with the guide plate, and a clamping member fixed to the telescopic plate at the end away from the slider. A fourth cylinder is also fixed to the side of the guide plate, and the movable end of the fourth cylinder is fixed to the telescopic plate. The clamping member is arranged in an "L" shape and includes a first straight edge and a second straight edge connected together.

2. The automatic belt-threading mechanism according to claim 1, characterized in that, A drive motor is installed on the side of the movable seat away from the first roller. The output end of the drive motor is connected to the rotation shaft of the first roller. The two first rollers can rotate synchronously but in different directions. A first cylinder is also fixed on the mounting plate. The movable end of the first cylinder is fixedly connected to the movable seat.

3. The automatic belt-threading mechanism according to claim 1, characterized in that, The power component includes a sliding component that is slidably mounted on the assembly frame. The sliding component is fixed to the two sliders via a follower arm. A third cylinder is also fixed on the assembly frame, and the movable end of the third cylinder is fixed to the sliding component.

4. The automatic belt-threading mechanism according to claim 1, characterized in that, The driven component includes a driven plate slidably disposed on the assembly plate, a plurality of second rollers rotatably mounted on the driven plate, and a plurality of elastic support members provided between the driven plate and the assembly plate; The elastic support includes a guide post fixed to the assembly plate and a cylindrical spring sleeved on the outer periphery of the guide post. The guide post passes through and is fixed to a protruding block on the driven plate and is slidably connected to the protruding block. The two ends of the cylindrical spring are respectively connected to the protruding block and the assembly plate. The driven plate is also fixed with a limiting strip, which abuts against a roller on the slider. The limiting strip has a connected flat surface and an inclined surface.

5. An automatic belt-threading mechanism according to claim 1, characterized in that, The assembly frame is provided with an electric telescopic arm, a first electric push rod and a second electric push rod in sequence along the length direction, and the tail ends of the three are respectively equipped with a first clamp, a second clamp and a third clamp; The first clamp, the second clamp, and the third clamp are used to clamp and fix the winding device, the upper guide, and the locking tongue, respectively, forming the winding device clamping station, the upper guide clamping station, and the locking tongue clamping station.

6. A car seatbelt assembly device, characterized in that, Includes the automatic belt-threading mechanism as described in claim 1.

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