Intelligent safety control belt collecting and tensioning device

Abstract

The utility model discloses an intellectualized safety control take-up straining device, including handle subassembly, base subassembly and long braid, handle subassembly includes handle and ratchet wheel, base subassembly includes base, handle and base are pivoted and rotatingly connected through take-up shaft, ratchet wheel is fixed on take-up shaft, and the winding drum is fixed between the ratchet wheel, and the long braid is fixed on the base. The ratchet wheel, the winding drum and the tape winding shaft rotate synchronously, the winding drum is sleeved outside the tape winding shaft and is coaxially arranged, an opening for the long braid to pass through is arranged on one side of the winding drum, one end of the long braid is sleeved on the tape winding shaft and is led out from one end of the base through the opening on the winding drum, one end of the tape winding shaft is connected with the coil spring assembly, and the coil spring assembly comprises a coil spring, a coil spring box and a coil spring box cover. The coil spring box is covered with the coil spring box, a brake assembly is further arranged in the coil spring box, and one end of the tape winding shaft can be provided with a C-shaped opening, an eccentric shaft or a concentric screw hole according to the structure of the brake assembly. According to the utility model, the long braid can be prevented from swinging to hurt an operator, and the personal safety of the operator is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tighteners, and in particular to an intelligent safety-controlled belt tightening device. Background Art

[0002] Tighteners are used to fix goods during transportation, movement, shipment or storage. They have locking properties and will not fall off. They are safe and reliable, lightweight, easy to operate, and protect objects from damage.

[0003] Common tensioners generally include a handle assembly, a base assembly, a ratchet and long and short webbings. When securing cargo, the long and short webbings are fixed in a fixed position (the long and short webbings can also be interconnected). Then, the handle assembly is pulled back and forth, and the ratchet is driven to rotate by the movable pawl on the handle assembly, thereby rotating the winding spring shaft connected to the ratchet, and winding the webbing until the webbing length reaches the limit, thereby completing the securing of the cargo. When it is necessary to untie the cargo, it is only necessary to rotate the handle assembly to a specified angle to disengage the movable pawl from the ratchet, and the stop pawl on the base assembly is lifted up by the handle side plate of the handle assembly and disengaged from the ratchet. At this time, the long webbing can be pulled out to achieve the purpose of untying the cargo.

[0004] Some tensioners have the function of automatically rewinding long webbing. When such tensioners with power sources are automatically rewinding long webbing, the rewinding speed must be carefully controlled to prevent the long webbing from swinging and injuring the operator. Therefore, a corresponding brake mechanism needs to be configured. Utility Model Content

[0005] In view of this, the utility model hopes to provide an intelligent safety control belt tensioning device, which can manually control the safety belt retraction and automatically reel in the long webbing, and is equipped with a brake mechanism to control the reeling speed of the long webbing.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] The utility model provides an intelligent safety control belt tightening device, comprising a handle assembly, a base assembly and a long webbing, the handle assembly comprising a handle and a ratchet, the base assembly comprising a base, the handle and the base are pivotally connected and rotatably connected through a belt winding shaft, the ratchet is fixedly mounted on the belt winding shaft, and a reel is fixed between the ratchet wheels, the ratchet, the reel and the belt winding shaft rotate synchronously, the reel is sleeved outside the belt winding shaft and is coaxially arranged, one side of the reel is provided with an opening for the long webbing to pass through, the One end of the long webbing is sleeved on the winding shaft and is led out from one end of the base through the opening on the reel. One end of the winding shaft is connected to a coil spring assembly, which includes a coil spring and a coil spring box sleeved on the coil spring. The base is characterized in that the base is composed of a base side plate and a base bottom plate, and the upper side arc surface of the base side plate is divided into a release area and a tensioning working area in sequence. The coil spring assembly also includes a coil spring box cover, which covers the coil spring box, and a brake assembly is also arranged in the coil spring box;

[0008] The brake assembly includes a limit tooth and a swing tooth. The limit tooth is connected to the winding spring box. A plurality of inner teeth are arranged on a circle of annular inner wall of the limit tooth close to the winding shaft. The swing tooth has a hole in the center, and a linkage groove and a brake groove are arranged in the hole. An oblique transition section is arranged between the linkage groove and the brake groove. The swing tooth is eccentrically sleeved on the C-shaped opening at the end of the winding shaft, and an outer contour tooth is arranged on the outer side surface away from the brake groove. The swing tooth rotates synchronously with the winding shaft.

[0009] Furthermore, the upper curved surface of the base side plate is provided with a first protrusion, and the first protrusion divides the upper curved surface of the base side plate into a release area and a tightening working area in sequence, the base side plate and the base bottom plate are an integrated structure, the base side plate is perpendicular to the base bottom plate, and are symmetrically located on both sides of the base bottom plate, the rear side of the base side plate is provided with a first pawl slide groove, the rear side of the base bottom plate is provided with a first limit plate, the first pawl slide groove is provided with a first pawl, the first pawl is T-shaped, and its two ends are slidably arranged at the first pawl slide groove, the lower end of the first pawl is sleeved with a first return spring, and the first limit plate is inserted into and slidably cooperates with the first limit plate, and the first pawl slides elastically in the direction of the first pawl slide groove under the action of the first return spring, and the first pawl cooperates with the ratchet wheel accordingly;

[0010] The handle is composed of a handle and a handle side plate, the handle side plates are connected to the handle and are symmetrically located on both sides of the handle, the handle side plates are coaxially rotatably connected to the base side plates through a shaft sleeve, the shaft sleeve is connected to the belt winding shaft, so that the handle side plates can rotate freely with the belt winding shaft as the central axis, a symmetrical second pawl slide groove is provided on the handle side plate, a second pawl is provided at the second pawl slide groove, the second pawl is L-shaped, a plastic sleeve is provided at the upper end, and two ends of the second pawl are slidably arranged at the second pawl slide groove, the second pawl is connected to the handle side plate on one side through a torsion spring, the second pawl slides elastically in the direction of the second pawl slide groove under the action of the torsion spring, and the second pawl cooperates with the ratchet wheel accordingly;

[0011] Two ends of the second pawl extend out of the second pawl sliding groove and fit with the upper arc surface of the base side plate under the action of the torsion spring;

[0012] The lower arc surface of the handle side plate is provided with a first extrusion surface and a second extrusion surface for extruding the first pawl.

[0013] Furthermore, the upper curved surface of the base side plate can be divided into an unloaded section, a tightening section and a releasing section in sequence, a first locking opening is arranged between the unloaded section and the tightening section, and a second locking opening is arranged at the end of the releasing section.

[0014] Furthermore, a front cover is provided at one end of the base close to the long webbing; a webbing channel is reserved on the front cover for the long webbing to pass through, and symmetrical limiting walls are provided, and symmetrical, strip-shaped limiting openings are provided at the bottom of the base, and the limiting walls and limiting openings cooperate to limit the handle to avoid interference between the side of the handle and the ratchet.

[0015] Furthermore, a hook is connected to the long webbing, and the front cover is located at one end of the base. The webbing channel thereon extends toward the other end of the base and is in a constricted shape for clamping one end of the hook.

[0016] Furthermore, a safety mechanism is provided at the opening of the hook, and the safety mechanism includes a return spring and a safety sleeve. The return spring is installed on the hook, and the safety sleeve is sleeved on the return spring, and under the action of the return spring, the opening of the hook is elastically closed.

[0017] Furthermore, a detachable connecting shaft is provided on the end of the base opposite to the long webbing, and one or more of a short webbing, a hook, a buckle and a fixed mounting plate are connected to the connecting shaft.

[0018] In a preferred embodiment of the utility model, the winding shaft and the brake assembly can also be that an eccentric shaft is provided at one end of the winding shaft, and the brake assembly includes a locking claw, a spring, and a fixing part, the fixing part is connected to the winding shaft, and the fixing part rotates synchronously with the winding shaft, the locking claw is provided with an outer contour tooth on the outer periphery near the winding spring box, the locking claw is connected to the eccentric shaft at the end of the winding shaft, the spring is provided between the locking claw and the fixing part, one end of the spring is connected to the fixing part, and the other end is connected to the locking claw, providing a force for the locking claw to close the winding shaft, and a plurality of continuous, circumferentially distributed internal teeth are provided on a circle of annular inner wall of the winding spring box facing the locking claw.

[0019] In a preferred embodiment of the utility model, the tape winding shaft and the brake assembly can also be that one end of the tape winding shaft is provided with a concentric screw hole, and the brake assembly includes a brake claw, a return spring, a limit plate, and a screw, and the limit plate is fixed to one end of the tape winding shaft by cooperating with the screw and the concentric screw hole, and the limit plate rotates synchronously with the tape winding shaft, and the brake claw is provided with an outer contour tooth on the outer periphery close to the winding spring box, the brake claw is connected to the limit plate, and the return spring is arranged between the brake claw and the fixing part, one end of the return spring is connected to the limit plate, and the other end is connected to the brake claw, so as to provide the brake claw with a force to close the tape winding shaft, and a plurality of continuous, circumferentially distributed internal teeth are provided on a circle of annular inner wall of the winding spring box facing the brake claw.

[0020] In a preferred embodiment of the utility model, the winding shaft and the brake assembly can also be that an eccentric shaft is provided at one end of the winding shaft, and the brake assembly includes a brake disc and a compression spring, the brake disc is provided with a groove, and an outer contour flange is provided on the outer periphery of the brake disc close to the winding spring box, the brake disc is connected to the eccentric shaft on the winding shaft, and the compression spring is installed in the groove, one end of which abuts against the brake disc and the other end of which abuts against the eccentric shaft of the winding shaft, and the brake disc rotates synchronously with the winding shaft.

[0021] The beneficial effects of the utility model are as follows:

[0022] (1) The utility model is reasonably designed and has a brake assembly. When the winding speed is too fast, the brake assembly will lock the long webbing to prevent the long webbing from swinging and injuring the operator, thereby ensuring the personal safety of the operator.

[0023] (2) The base structure of the utility model is simple. The rapid retraction of the webbing can be manually controlled by adjusting the position of the handle on the upper arc surface of the side plate of the base. The utility model is easy to manufacture and saves costs.

[0024] (3) The utility model adopts a front cover with a limiting wall, which can limit the handle, effectively avoid interference between the handle side and the ratchet and the base side, improve the smoothness of the use of the tensioning device, and save effort to use. It can also reduce deformation of the handle caused by use, reduce friction, and increase the service life of the tensioning device.

[0025] (4) The utility model adopts a safety device at the opening of the hook, which can prevent the hook from accidentally falling off when fixed, thereby increasing the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an explosion diagram of Embodiment 1 of the utility model;

[0027] Figure 2 This is a schematic diagram of the combined state of an embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the first base structure of the utility model embodiment;

[0029] Figure 4 This is a schematic diagram of the second base structure of the utility model embodiment;

[0030] Figure 5 This is a schematic diagram of the structure of the handle assembly of an embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the working principle of the locking position of the release area of ​​the first base structure of the utility model embodiment;

[0032] Figure 7 for Figure 6 A partial enlarged view of part A;

[0033] Figure 8 This is a schematic diagram of the working principle of the release area of ​​the first base structure of the utility model embodiment;

[0034] Fig. 9 It is a top view of an embodiment of the utility model;

[0035] Fig.10 This is a cross-sectional view of an embodiment of the utility model;

[0036] Fig.11 This is a schematic diagram of the front cover of an embodiment of the utility model;

[0037] Fig.12 This is a schematic diagram of a tape reel in accordance with a first embodiment of the present utility model;

[0038] Fig.13 This is a schematic diagram of the interior of the brake assembly of Embodiment 1 of the utility model (unwinding state);

[0039] Fig.14 This is a schematic diagram of the interior of the brake assembly of Embodiment 1 of the utility model (locked state);

[0040] Fig.15 This is a schematic diagram of the interior of the brake assembly of Embodiment 1 of the utility model (reeled state);

[0041] Fig.16 This is a schematic diagram of the base structure of the second embodiment of the utility model;

[0042] Fig.17 This is a schematic diagram of the explosion of the third embodiment of the utility model;

[0043] Fig.18 This is a schematic diagram of the explosion of the fourth embodiment of the utility model;

[0044] Fig.19 This is a schematic diagram of a tape reel according to a fourth embodiment of the present utility model;

[0045] Fig. 20 This is a schematic diagram of a brake assembly in Embodiment 4 of the present utility model;

[0046] Fig.21 This is a schematic diagram of the interior of the brake assembly of the fourth embodiment of the utility model (unwinding state);

[0047] Fig. 22 This is a schematic diagram of the interior of the brake assembly of the fourth embodiment of the utility model (locked state);

[0048] Fig.23 This is a schematic diagram of the interior of the brake assembly of the fourth embodiment of the utility model (reeled state);

[0049] Fig.24 This is a schematic diagram of the explosion of Embodiment 5 of the present utility model;

[0050] Fig.25 This is a schematic diagram of a tape reel in Embodiment 5 of the present utility model;

[0051] Fig.26 This is a schematic diagram of a brake assembly in Embodiment 5 of the present utility model;

[0052] Fig. 27 This is a schematic diagram of the interior of the brake assembly of Embodiment 5 of the utility model (unwinding state);

[0053] Fig.28 This is a schematic diagram of the interior of the brake assembly of Embodiment 5 of the present utility model (locked state);

[0054] Fig.29 This is a schematic diagram of the interior of the brake assembly of Embodiment 5 of the present utility model (reeled state);

[0055] Fig.30 This is a schematic diagram of the explosion of the sixth embodiment of the utility model;

[0056] Fig.31 This is a schematic diagram of a belt reel according to a sixth embodiment of the present utility model;

[0057] Fig.32 This is a schematic diagram of a brake assembly in Embodiment 6 of the present utility model;

[0058] Fig.33 This is a cross-sectional view of the brake assembly assembly of the sixth embodiment of the utility model;

[0059] Fig.34 This is a schematic diagram of the interior of the brake assembly of Embodiment 6 of the utility model (unwinding state);

[0060] Fig.35 This is a schematic diagram of the interior of the brake assembly of Embodiment 6 of the utility model (locked state);

[0061] Fig.36 This is a schematic diagram of the interior of the brake assembly of Embodiment 6 of the present utility model (reeled state);

[0062] Among them: 1 is the handle assembly, 2 is the base assembly, 3 is the long webbing, 4 is the handle, 41 is the handle, 42 is the handle side plate, 1143 is the shaft sleeve, 43 is the second ratchet slide groove, 44 is the plastic sleeve, 45 is the torsion spring, 46 is the lower side arc surface, 401 is the first extrusion surface, 402 is the second extrusion surface, 5 is the ratchet, 6 is the base, 61 is the base side plate, 62 is the base bottom plate, 63 is the second ratchet slide groove, 64 is the first limit plate, 65 is the first return spring, 66 is the upper side arc surface, 601 is the no-load section, 6001 is the first position, 602 is the tightening section, 603 is the release section, 604 is the first lock, 605 is the second lock, 606 is the release area, 607 is the tensioning working area, 608 is the locking position, 609 is the first protrusion, 7 is the winding shaft, 71 is the C-shaped The opening, 72 is the eccentric shaft, 8 is the reel, 9 is the coil spring assembly, 91 is the coil spring, 92 is the coil spring box, 93 is the coil spring box cover, 10 is the brake assembly, 11 is the limit tooth, 12 is the swing tooth, 13 is the inner tooth, 14 is the linkage groove, 15 is the brake groove, 16 is the transition section, 17 is the outer contour tooth, 18 is the front cover, 19 is the webbing channel, 20 is the limit wall, 21 is the limit opening, 22 is the hook, 23 is the insurance mechanism, 24 is the return spring, 25 is the insurance condom, 26 is the connecting shaft, 27 is the second pawl, 28 is the first pawl, 29 is the locking pawl, 30 is the spring, 31 is the fixing part, 32 is the brake pawl, 33 is the return spring, 34 is the limit disk, 35 is the screw, 36 is the brake disk, 37 is the compression spring, 38 is the groove, 39 is the outer contour flange, and 40 is the concentric screw hole. DETAILED DESCRIPTION

[0063] In order to more thoroughly understand the features and technical contents of the present invention, the implementation of the present invention is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not intended to limit the present invention.

[0064] Embodiment 1

[0065] like Figure 1-Figure 15 As shown, this embodiment discloses an intelligent safety control belt tensioning device, including a handle assembly 1, a base assembly 2 and a long webbing 3, the handle assembly 1 includes a handle 4 and a ratchet 5, the base assembly 2 includes a base 6, the handle 4 and the base 6 are pivotally connected through a winding shaft 7, the ratchet 5 is fixedly mounted on the winding shaft 7, and a reel 8 is fixed between the ratchet 5, the ratchet 5, the reel 8 and the winding shaft 7 rotate synchronously, the reel 8 is sleeved outside the winding shaft 7 and is coaxially arranged, and the reel 8 An opening is provided on one side for the long webbing 3 to pass through, one end of the long webbing 3 is sleeved on the winding shaft 7, and is led out from one end of the base 6 through the opening on the reel 8, one end of the winding shaft 7 is connected to the coil spring assembly 9, the coil spring assembly 9 includes a coil spring 91 and a coil spring box 92 sleeved on the coil spring 91, one end of the winding shaft 7 is set as a C-shaped opening 71, the coil spring assembly 9 also includes a coil spring box cover 93, the coil spring box cover 93 covers the coil spring box 92, and a brake assembly 10 is also set in the coil spring box 92.

[0066] The brake assembly 10 includes a limit tooth 11 and a swing tooth 12. The limit tooth 11 is connected to the spring box 92. A plurality of inner teeth 13 are arranged on a circle of annular inner wall of the limit tooth 11 close to the tape shaft 7. The swing tooth 12 has a central opening, and a linkage groove 14 and a brake groove 15 are arranged in the hole. An oblique transition section 16 is arranged between the linkage groove 14 and the brake groove 15. The swing tooth 12 is eccentrically sleeved on the C-shaped opening 71 at the end of the tape shaft 7, and an outer contour tooth 17 is arranged on the outer side surface away from the brake groove 15. The swing tooth 12 rotates synchronously with the tape shaft 7.

[0067] The base 6 is composed of a base side plate 61 and a base bottom plate 62, the base side plate 61 and the base bottom plate 62 are an integrated structure, the base side plate 61 is perpendicular to the base bottom plate 62, and are symmetrically located on both sides of the base bottom plate 62, the rear side of the base side plate 61 is provided with a first ratchet slot 63, the rear side of the base bottom plate 62 is provided with a first limit plate 64, the first ratchet slot 63 is provided with a first ratchet 28, the first ratchet 28 is T-shaped, and its two ends are slidably arranged at the first ratchet slot 63, the lower end of the first ratchet 28 is sleeved with a first return spring 65, and the first limit plate 64 is inserted into the first limit plate 64, and the first ratchet 28 is slidably matched with the first limit plate 64, under the action of the first return spring 65, the first ratchet 28 elastically slides along the direction of the first ratchet slot 63, and the first ratchet 28 is correspondingly matched with the ratchet wheel 5;

[0068] The handle 4 is composed of a handle 41 and a handle side plate 42. The handle side plate 42 is connected to the handle 41 and is symmetrically located on both sides of the handle 41. The handle side plate 42 is coaxially rotatably connected to the base side plate 61 through a shaft sleeve 1143. The shaft sleeve 1143 is connected to the belt winding shaft 7, so that the handle side plate 42 can rotate freely with the belt winding shaft 7 as the central axis. A symmetrical second ratchet chute 43 is provided on the handle side plate 42. A second ratchet 27 is provided at the second ratchet chute 43. The second ratchet 27 is L-shaped, and a plastic sleeve 44 is provided at the upper end thereof for convenient operation by the staff. The two ends thereof are slidably arranged at the second ratchet chute 43. The second ratchet 27 is connected to the handle side plate 42 on one side through a torsion spring 45. Under the action of the torsion spring 45, the second ratchet 27 elastically slides along the direction of the second ratchet chute 43, and the second ratchet 27 corresponds to the ratchet wheel 5.

[0069] Both ends of the second pawl 27 extend out of the second pawl slot 43, and under the action of the torsion spring 45, fit with the upper arc surface 66 of the base side plate 61. The upper arc surface 66 of the base side plate 61 is provided with a first protrusion 609. The first protrusion 609 divides the upper arc surface 66 of the base side plate 61 into a release area 606 and a tensioning working area 607 in sequence.

[0070] A first pressing surface 401 and a second pressing surface 402 for pressing the first pawl 28 are formed on the lower curved surface 46 of the handle side plate 42 .

[0071] A front cover 18 is provided at one end of the base 6 close to the long webbing 3; a webbing channel 19 is reserved on the front cover 18 for the long webbing 3 to pass through, and symmetrical limiting walls 20 are provided, and a symmetrical, strip-shaped limiting opening 21 is provided at the bottom of the base 6, and the limiting walls 20 and the limiting opening 21 cooperate to limit the handle 4; when the handle assembly 1 rotates, the side plate of the handle 4 will move under the limiting action of the limiting walls 20 and the limiting opening 21, which can effectively avoid interference between the side of the handle 4 and the ratchet 5 and the side of the base 6; on the one hand, the smoothness of the use of the tensioning device can be improved, and it is more labor-saving to use; on the other hand, the deformation of the handle 4 caused by use can be reduced, the friction can be reduced and the service life of the tensioning device can be increased.

[0072] The long webbing 3 is connected with a hook 22, the front cover 18 is located at one end of the base 6, the webbing channel 19 on the front cover 18 extends toward the other end of the base 6 and is in a constricted shape, so that the webbing channel 19 is in a slot shape with a certain depth. When the long webbing 3 is completely rolled up, one end of the hook 22 on the long webbing 3 can be inserted into the webbing channel 19, which plays a role in fixing the hook 22, preventing the hook 22 from shaking, and reducing safety hazards.

[0073] A safety mechanism 23 is provided at the opening of the hook 22 to prevent the hook 22 from accidentally detaching in a fixed state, thereby increasing safety in use. The safety mechanism 23 includes a return spring 24 and a safety condom 25. The return spring 24 is installed on the hook 22 and has an elastic force to move toward the opening of the hook 22. The safety condom 25 is sleeved on the return spring 24. At this time, the safety condom 25 elastically closes the opening of the hook 22 under the action of the return spring 24.

[0074] A detachable connecting shaft 26 is provided on the end of the base 6 opposite to the long webbing 3, and the connecting shaft 26 is connected to one or more of a short webbing, a hook, a buckle and a fixed mounting plate, and also includes other fasteners for fixing.

[0075] Working principle:

[0076] When securing the cargo, the position of the second pawl 27 on the upper arc surface 66 (release area 606, first protrusion 609, tensioning working area 607) of the base side plate 61 is adjusted by rotating the handle 4, thereby realizing the adjustment function of the manual locking webbing and the tensioning device.

[0077] like Figure 6 and Figure 7As shown, when the second pawl 27 is located at the locking position 608 of the release area 606, at this time, the end faces of the first pawl 28 and the second pawl 27 abut against the top of the teeth of the ratchet 5, the ratchet 5 is fixed, and the long webbing 3 is locked. When the force applied to the long webbing 3 is greater than the elastic force of the first return spring 65 and the torsion spring 45, the ratchet 5 can be pulled and rotated, and the long webbing 3 can be pulled out.

[0078] like Figure 8 As shown, when the handle 4 is turned and pressed downward, the second pawl 27 moves downward along the release area 606. At this time, the distance between the second pawl 27 and the rotation axis of the ratchet 5 increases, and the second pawl 27 is disengaged from the ratchet 5. At the same time, the first extrusion surface 401 squeezes the first pawl 28, so that the distance between the first pawl 28 and the rotation axis of the ratchet 5 increases, and the first pawl 28 is disengaged from the ratchet 5. In this state, the long webbing 3 can be quickly adjusted, but the handle 4 needs to be pressed down continuously. Otherwise, release the downward pressure on the handle, and the first pawl 28 and the second pawl 27 respectively force the handle 4 to reset upward under the action of the first reset spring 65 and the torsion spring 45, so that the first pawl 28 and the second pawl 27 are again in contact with the top of the teeth of the ratchet 5, thereby stopping the long webbing 3. In this state, the long webbing 3 can be manually controlled to retract quickly.

[0079] When the second pawl 27 is located in the tensioning working area 607, at this time, the first pawl 28 and the second pawl 27 are both engaged with the ratchet 5, and the second pawl 27 does not contact the tensioning working area 607. The handle 4 is rotated counterclockwise, and the second pawl 27 moves along the tensioning working area 607, driving the ratchet 5 to rotate, and the first pawl 28 slides along the outer edge of the ratchet 5. When the handle 4 is rotated to the extreme position of the tensioning working area 607, the handle 4 can be rotated clockwise, and the second pawl 27 slides along the outer edge of the ratchet 5. The first pawl 28 engages with the ratchet 5, and the handle 4 is reset. Repeating the counterclockwise and clockwise rotation of the handle 4 can manually reel in the long webbing 3, and is also used to increase the tension of the long webbing 3 to tighten it.

[0080] When the long webbing 3 needs to be retracted after use, first turn the handle 4 to adjust the second pawl 27 from the tensioning working area 607 to the position of the first protrusion 609. This is a pre-release state. When the handle 4 is pressed down to the bottom, the first pawl 28 and the second pawl 27 are disengaged from the ratchet 5. Under the action of the winding spring 91, the long webbing 3 is automatically reeled in. At this time, release the downward pressure on the handle to stop the webbing immediately.

[0081] When the long webbing 3 is unwound normally, the winding shaft 7 drives the swinging tooth 12 to rotate. At this time, the C-shaped opening 71 at the end of the winding shaft 7 is inserted into the linkage groove 14, and the outer contour teeth 17 of the swinging tooth 12 are not in contact with the inner teeth 13 of the limiting teeth 11, so that the long webbing 3 can be unwound continuously; when the long webbing 3 is wound up, one side of the C-shaped opening 71 at the end of the winding shaft 7 continuously abuts against the transition section 16, and the outer contour teeth 17 of the swinging tooth 12 are away from the inner teeth 13 of the limiting teeth 11, so that the long webbing 3 can be wound up. The winding is continued, but when the winding speed is too fast, the swing tooth 12 causes the C-shaped opening 71 of the winding spring shaft 7 to be stuck in the brake groove 15 under the action of impact rebound and inertial centrifugal force. At this time, the outer contour teeth 17 of the swing tooth 12 are engaged with the inner teeth 13 of the limit teeth 11, and the brake assembly 10 is in a braking state, and the winding of the long webbing 3 is locked; until the long webbing 3 is pulled out for a distance, the outer contour teeth 17 of the swing tooth 12 are disengaged from the inner teeth 13 of the limit teeth 11, and the long webbing 3 can be wound again.

[0082] Embodiment 2

[0083] The difference between the second embodiment and the first embodiment is that the base 6 is another implementation of the first base, such as Fig.16 As shown, the upper curved surface 66 of the base side plate 61 is provided with a first protrusion 609 , and the first protrusion 609 divides the upper curved surface 66 of the base side plate 61 into a release area 606 and a tensioning working area 607 in sequence.

[0084] When securing the cargo, the position of the second pawl 27 on the upper arc surface 66 (release area 606, first protrusion 609, tensioning working area 607) of the base side plate 61 is adjusted by rotating the handle 4, thereby realizing the adjustment function of releasing the webbing and the tensioning device.

[0085] When the second pawl 27 is located in the release area 606, the second pawl 27 is disengaged from the ratchet 5. At this time, the second extrusion surface 402 squeezes the first pawl 28 to disengage the first pawl 28 from the ratchet 5. At this time, a pulling force is applied to the long webbing, and the long webbing can be pulled out.

[0086] When the handle 4 is turned and pressed downward, the second pawl 27 moves downward along the first protrusion 609 to reach the tensioning working area 607. At this time, the first pawl 28 and the second pawl 27 are both engaged with the ratchet 5, and the second pawl 27 does not contact the tensioning working area 607. Turn the handle 4 downward, the second pawl 27 moves along the tensioning working area 607, driving the ratchet 5 to rotate, and the first pawl 28 slides along the outer edge of the ratchet 5. When the handle 4 is rotated to the extreme position of the tensioning working area 607, the handle 4 can be rotated in the opposite direction, the second pawl 27 slides along the outer edge of the ratchet 5, the first pawl 28 engages with the ratchet 5, the handle 4 is reset, and the rotation of the handle 4 is repeated. The long webbing 3 can be manually reeled in, and it is also used to increase the tension of the long webbing 3 to tighten it.

[0087] When the long webbing 3 needs to be retracted after use, the handle 4 is turned to adjust the second pawl 27 from the tensioning working area 607 to the release area 606, and the first pawl 28 and the second pawl 27 are disengaged from the ratchet 5. Under the action of the winding spring 91, the long webbing 3 is automatically retracted.

[0088] Embodiment 3

[0089] The difference between the third embodiment and the first embodiment is that the base 6 adopts the second type of base, such as Fig.17 As shown, the upper curved surface 66 can also be divided into an unloaded section 601, a tightening section 602 and a releasing section 603 in sequence. A first locking opening 604 is provided between the unloaded section 601 and the tightening section 602, and a second locking opening 605 is provided at the end of the releasing section 603.

[0090] When securing the cargo, the position of the second pawl 27 on the upper arc surface 66 (the unloaded section 601, the first locking opening 604, the tightening section 602, the releasing section 603 and the second locking opening 605) of the base side plate 61 is adjusted by rotating the handle 4, so as to realize the functional adjustment of the manual locking webbing and the tensioning device;

[0091] When the second pawl 27 is located at the first position 6001 of the unloaded section 601, at this time, the end faces of the first pawl 28 and the second pawl 27 abut against the top of the teeth of the ratchet 5, the ratchet 5 is fixed, and the long webbing 3 is locked. When the force applied to the long webbing 3 is greater than the elastic force of the first return spring 65 and the torsion spring 45, the ratchet 5 can be pulled and rotated, and the long webbing 3 can be pulled out.

[0092] When the second pawl 27 is located in the no-load section 601, the handle 4 can be pressed down. When the handle 4 is turned and pressed down, the second pawl 27 moves downward along the no-load section 601. At this time, the distance between the second pawl 27 and the rotation axis of the ratchet 5 increases, and the second pawl 27 is separated from the ratchet 5. At the same time, the first extrusion surface 401 squeezes the first pawl 28, so that the distance between the first pawl 28 and the rotation axis of the ratchet 5 increases, and the first pawl 28 is separated from the ratchet 5. At this time, under the action of the coil spring 91, the coil The spring shaft 7 and the ratchet wheel 5 rotate to drive the long webbing 3 to reel up. In this state, the long webbing 3 can also be stretched manually, but it is more laborious because the handle 4 needs to be pressed down continuously. Otherwise, the first pawl 28 and the second pawl 27 respectively force the handle 4 to reset upward under the action of the first reset spring 65 and the torsion spring 45, so that the first pawl 28 and the second pawl 27 are again in contact with the top of the teeth of the ratchet wheel 5, and the long webbing 3 can be stopped. In this state, the long webbing 3 can be manually controlled to retract quickly;

[0093] When the second pawl 27 is located at the first locking opening 604, the second pawl 27 is engaged with the first locking opening 604. At this time, the handle 4 cannot rotate to prevent misoperation. The second pawl 27 is disengaged from the ratchet 5, and the first pawl 28 is engaged with the ratchet 5. The ratchet 5 cannot rotate, and the tensioning device is in a safe locked state.

[0094] When the second pawl 27 is located in the tightening section 602, at this time, the first pawl 28 and the second pawl 27 are both engaged with the ratchet 5, and the second pawl 27 does not contact the tightening section 602 (ensuring the meshing effect of the second pawl 27 and the ratchet 5, and preventing the second pawl 27 from rubbing against the tightening section 602, resulting in an increase in the rotational resistance of the rotating pull handle 4), the handle 4 is rotated counterclockwise, the second pawl 27 moves along the tightening section 602, driving the ratchet 5 to rotate, and the first pawl 28 slides along the outer edge of the ratchet 5. When the handle 4 is rotated to the extreme position of the tightening section 602, the handle 4 can be rotated clockwise, the second pawl 27 slides along the outer edge of the ratchet 5, the first pawl 28 engages with the ratchet 5, the handle 4 is reset, and the counterclockwise and clockwise rotation of the handle 4 is repeated, the long webbing 3 can be manually wound up, and it is also used to increase the tension of the long webbing 3 to tighten it;

[0095] When the second pawl 27 is in the release section 603, the second pawl 27 is disengaged from the ratchet 5, and the handle 4 is continuously rotated counterclockwise until the second pawl 27 is engaged with the second locking port 605. At this time, the second extrusion surface 402 squeezes the first pawl 28, so that the first pawl 28 is disengaged from the ratchet 5, and under the action of the winding spring 91, the long webbing 3 is automatically reeled up.

[0096] Embodiment 4

[0097] like Figure 18-Figure 23 As shown, in this embodiment, an eccentric shaft 72 is provided at one end of the tape shaft 7, and the brake assembly 10 includes a locking claw 29, a spring 30, and a fixing member 31. The fixing member 31 is connected to the tape shaft 7, and the fixing member 31 rotates synchronously with the tape shaft 7. The locking claw 29 is provided with an outer contour tooth on the outer periphery close to the winding spring box 92, and the locking claw 29 is connected to the eccentric shaft 72 at the end of the tape shaft 7. The spring 30 is arranged between the locking claw 29 and the fixing member 31. One end of the spring 30 is connected to the fixing member 31, and the other end is connected to the locking claw 29, so as to provide a force for the locking claw 29 to close to the tape shaft 7. A plurality of continuous, circumferentially distributed internal teeth are provided on a circle of annular inner wall of the winding spring box 92 facing the locking claw 29.

[0098] In this embodiment, the spring 30 and the fixing member 31 can be replaced by a torsion spring structure, one end of the torsion spring is connected to the tape reel shaft, and the other end is connected to the locking claw.

[0099] When the long webbing 3 is unwound normally, the take-up shaft 7 and the eccentric shaft 72 at the end of the take-up shaft drive the locking claw 29 to rotate. When the unwinding speed is slow, the locking claw 29 will not be thrown off due to the elastic force of the spring 30. When the unwinding speed is too fast, the centrifugal force generated exceeds the elastic force of the spring 30, and the locking claw 29 is thrown off. However, according to the ratchet principle, at this time, the outer contour teeth of the locking claw 29 contact the inner teeth of the winding spring box 92 but do not bite, and the long webbing 3 can be unwound continuously; when the long webbing 3 is wound up, the take-up shaft 7 and the eccentric shaft 72 at the end of the take-up shaft drive the locking claw 29 to rotate in the other direction. When the winding speed is slow, the centrifugal force generated does not exceed Due to the elastic force of the spring 30, the locking claw 29 will not be thrown off, the outer contour teeth of the locking claw 29 will not contact the inner teeth of the winding spring box 92, and the long webbing 3 can be continuously reeled; when the reeling speed is too fast, the centrifugal force generated exceeds the elastic force of the spring 30, the locking claw 29 is thrown off, the offset outer contour teeth of the locking claw 29 are engaged with the inner teeth on the winding spring box 92, the brake assembly 10 is in the braking state, the winding spring shaft 7 cannot rotate, and the reeling of the long webbing 3 is locked. After locking, you only need to pull out a small section of the long webbing 3, and the locking claw 29 will reset under the action of the elastic force of the spring 30, the outer contour teeth of the locking claw 29 will be disengaged from the inner teeth on the winding spring box 92, and the long webbing 3 can be reeled up again.

[0100] Embodiment 5

[0101] like Figure 24-Figure 29 As shown, in this embodiment, a concentric screw hole 40 is provided at one end of the tape winding shaft 7, and the brake assembly 10 includes a brake claw 32, a return spring 33, a limit plate 34, and a screw 35. The limit plate 34 is fixed to one end of the tape winding shaft 7 by cooperating with the screw 35 and the concentric screw hole 40. The limit plate 34 rotates synchronously with the tape winding shaft 7. The brake claw 32 is provided with an outer contour tooth on the outer periphery near the winding spring box 92, the brake claw 32 is connected to the limit plate 34, and the return spring 33 is arranged between the brake claw 32 and the limit plate 34. One end of the return spring 33 is connected to the limit plate 34, and the other end is connected to the brake claw 32, so as to provide the brake claw 32 with a force to close to the tape winding shaft 7. A plurality of continuous, circumferentially distributed internal teeth are provided on a circle of annular inner wall of the winding spring box 92 facing the brake claw 32.

[0102] When the long webbing 3 is unwound normally, the winding shaft 7 and the limit plate 34 fixed at the end of the winding shaft 7 drive the brake claw 32 to rotate. When the unwinding speed is slow, the brake claw 32 will not be thrown off due to the elastic force of the return spring 33. When the unwinding speed is too fast, the centrifugal force generated exceeds the elastic force of the return spring 33, and the brake claw 32 is thrown off. However, according to the ratchet principle, at this time, the outer contour teeth of the brake claw 32 contact the inner teeth of the winding spring box 92 but do not bite, and the long webbing 3 can be continuously unwound; when the long webbing 3 is wound up, the winding shaft 7 and the limit plate 34 fixed at the end of the winding shaft 7 drive the brake claw 32 to rotate in the other direction. When the winding speed is slow, the centrifugal force generated is not When the elastic force of the reset spring 33 is exceeded, the brake claw 32 will not be thrown away, the outer contour teeth of the brake claw 32 will not contact the inner teeth of the winding spring box 92, and the long webbing 3 can be continuously reeled; when the reeling speed is too fast, the centrifugal force generated exceeds the elastic force of the reset spring 33, the brake claw 32 is thrown away, the offset outer contour teeth of the brake claw 32 are engaged with the inner teeth on the winding spring box 92, the brake assembly 10 is in a braking state, the winding spring shaft 7 cannot rotate, and the reeling of the long webbing 3 is locked. After locking, it is only necessary to pull out a small section of the long webbing 3, and the brake claw 32 is reset under the action of the elastic force of the reset spring 33, the outer contour teeth of the brake claw 32 are disengaged from the inner teeth on the winding spring box 92, and the long webbing 3 can be reeled up again.

[0103] Embodiment 6

[0104] like Figure 30-Figure 36 As shown, an eccentric shaft is provided at one end of the take-up shaft 7, and the brake assembly 10 includes a brake disc 36 and a compression spring 37. A groove 38 is provided on the brake disc 36, and an outer contour flange 39 is provided on the outer periphery of the brake disc 36 close to the take-up spring box 92. The brake disc 36 is connected to the eccentric shaft on the take-up shaft 7, and the compression spring 37 is installed in the groove 38, with one end abutting against the brake disc 36 and the other end abutting against the eccentric shaft of the take-up shaft 7, and the brake disc 36 rotates synchronously with the take-up shaft 7.

[0105] When the long webbing 3 is unwound normally, the winding shaft 7 and the eccentric shaft at the end of the winding shaft 7 drive the brake disc 36 to rotate, and the long webbing 3 can be continuously unwound; when the long webbing 3 is wound up, the winding shaft 7 and the eccentric shaft at the end of the winding shaft 7 drive the brake disc 36 to rotate in the other direction. When the winding speed is slow, the centrifugal force generated does not exceed the elastic force of the compression spring 37, the brake disc 36 will not be thrown off, the outer contour flange 39 of the brake disc 36 does not contact the inner wall of the winding spring box 92, and the long webbing 3 can be continuously wound up; when the winding speed is slow, the centrifugal force generated does not exceed the elastic force of the compression spring 37, the brake disc 36 will not be thrown off, and the outer contour flange 39 of the brake disc 36 will not contact the inner wall of the winding spring box 92, and the long webbing 3 can be continuously wound up. If the rotation speed is too fast, the centrifugal force generated exceeds the elastic force of the compression spring 37, and the brake disc 36 is thrown away. The offset outer contour flange 39 of the brake disc 36 engages with the inner wall of the coil spring box 92, and the brake assembly 10 is in a braking state. The coil spring shaft 7 cannot rotate, and the winding of the long webbing 3 is locked. After locking, it is only necessary to pull out a small section of the long webbing 3, and the brake disc 36 is reset under the action of the elastic force of the compression spring 37. The outer contour flange 39 of the brake disc 36 is disengaged from the inner wall of the coil spring box 92, and the long webbing 3 can be rewound.

[0106] Here, the specific models of the above-mentioned devices are not limited or described in detail, and the in-depth connection methods of the above-mentioned devices are not described in detail. As common knowledge, technicians in this field can understand it.

[0107] The embodiments of the utility model are only to introduce its specific implementation methods and are not intended to limit its protection scope. The technicians in this industry can make some modifications inspired by the embodiments, so any equivalent changes or modifications made in accordance with the scope of the utility model patent are within the scope of the claims of the utility model patent.

Claims

1. An intelligent safety control belt tensioning device, comprising a handle assembly (1), a base assembly (2) and a long webbing (3), wherein the handle assembly (1) comprises a handle (4) and a ratchet (5), the base assembly (2) comprises a base (6), the handle (4) and the base (6) are pivotally connected via a belt winding shaft (7), the ratchet (5) is fixedly mounted on the belt winding shaft (7), and a reel (8) is fixed between the ratchet (5), the ratchet (5), the reel (8) and the belt winding shaft (7) are connected to each other. 7) rotate synchronously, the reel (8) is sleeved outside the winding shaft (7) and is coaxially arranged, one side of the reel (8) is provided with an opening for the long webbing (3) to pass through, one end of the long webbing (3) is sleeved on the winding shaft (7) and is led out from one end of the base (6) through the opening on the reel (8), one end of the winding shaft (7) is connected to a coil spring assembly (9), the coil spring assembly (9) includes a coil spring (91) and a coil spring box (92) sleeved on the coil spring (91), characterized in that, The base (6) is composed of a base side plate (61) and a base bottom plate (62), and the upper curved surface (66) of the base side plate (61) is divided into a release area (606) and a tensioning working area (607) in sequence. The coil spring assembly (9) also includes a coil spring box cover (93), and the coil spring box cover (93) covers the coil spring box (92). A brake assembly (10) is also arranged in the coil spring box (92).

2. The intelligent safety control belt tightening device according to claim 1, characterized in that: The upper curved surface (66) of the base side plate (61) is provided with a first protrusion (609), and the first protrusion (609) divides the upper curved surface (66) of the base side plate (61) into a release area (606) and a tensioning working area (607) in sequence. The base side plate (61) and the base bottom plate (62) are an integrated structure. The base side plate (61) is perpendicular to the base bottom plate (62) and is symmetrically located on both sides of the base bottom plate (62). The rear side of the base side plate (61) is provided with a first ratchet sliding groove (63). The base bottom plate ( A first limiting plate (64) is provided on the rear side of the first pawl (62), and a first pawl (28) is provided at the first pawl slot (63). The first pawl (28) is T-shaped, and its two ends are slidably arranged at the first pawl slot (63). The lower end is sleeved with a first return spring (65) and is inserted into the first limiting plate (64) and slidably matched with the first limiting plate (64). Under the action of the first return spring (65), the first pawl (28) elastically slides along the direction of the first pawl slot (63), and the first pawl (28) corresponds to the ratchet (5); The handle (4) is composed of a handle (41) and a handle side plate (42). The handle side plate (42) is connected to the handle (41) and is symmetrically located on both sides of the handle (41). The handle side plate (42) is coaxially rotatably connected to the base side plate (61) through a shaft sleeve (1143). The shaft sleeve (1143) is connected to the belt reel shaft (7) so that the handle side plate (42) can rotate freely with the belt reel shaft (7) as the central axis. A symmetrical second ratchet pawl slot (43) is provided on the handle side plate (42). A second pawl (27) is provided at the second pawl slot (43). The second pawl (27) is L-shaped, and a plastic sleeve (44) is sleeved on its upper end. Both ends of the pawl are slidably arranged at the second pawl slot (43). The second pawl (27) is connected to a handlebar side plate (42) on one side through a torsion spring (45). Under the action of the torsion spring (45), the second pawl (27) elastically slides along the direction of the second pawl slot (43), and the second pawl (27) is correspondingly matched with the ratchet wheel (5). Both ends of the second pawl (27) extend out of the second pawl sliding groove (43) and, under the action of the torsion spring (45), fit with the upper curved surface (66) of the base side plate (61); A first extrusion surface (401) and a second extrusion surface (402) for extruding the first ratchet pawl (28) are provided on the lower curved surface (46) of the handle side plate (42).

3. The intelligent safety control belt tightening device according to claim 2, characterized in that: The upper curved surface (66) of the base side plate (61) can also be divided into an unloaded section (601), a tightening section (602) and a releasing section (603) in sequence, a first locking opening (604) is arranged between the unloaded section (601) and the tightening section (602), and a second locking opening (605) is arranged at the end of the releasing section (603).

4. The intelligent safety control belt tightening device according to claim 3, characterized in that: One end of the tape reel (7) is arranged as a C-shaped opening (71), and the brake assembly (10) comprises a limit tooth (11) and a swing tooth (12), wherein the limit tooth (11) is connected to the winding spring box (92), and a plurality of inner teeth (13) are arranged on a circle of annular inner wall of the limit tooth (11) close to the tape reel (7), the swing tooth (12) has a central opening, and a linkage groove (14) and a brake groove (15) are arranged in the hole, and an oblique transition section (16) is arranged between the linkage groove (14) and the brake groove (15), and the swing tooth (12) is eccentrically sleeved on the C-shaped opening (71) at the end of the tape reel (7), and an outer contour tooth (17) is arranged on the outer side surface away from the brake groove (15), and the swing tooth (12) rotates synchronously with the tape reel (7).

5. The intelligent safety control belt tightening device according to claim 3, characterized in that: An eccentric shaft (72) is provided at one end of the tape reel (7), and the brake assembly (10) comprises a locking claw (29), a spring (30), and a fixing member (31), wherein the fixing member (31) is connected to the tape reel (7), and the fixing member (31) rotates synchronously with the tape reel (7), and an outer contour tooth is provided on the outer periphery of the locking claw (29) close to the coil spring box (92), and the locking claw (29) is connected to the end of the tape reel (7). The spring (30) is connected to the eccentric shaft (72) of the locking claw (29), the spring (30) is arranged between the locking claw (29) and the fixing member (31), one end of the spring (30) is connected to the fixing member (31), and the other end is connected to the locking claw (29), providing a force for the locking claw (29) to close to the belt winding shaft (7), and a plurality of continuous inner teeth distributed in the circumferential direction are arranged on a circle of annular inner wall of the winding spring box (92) facing the locking claw (29).

6. The intelligent safety control belt tightening device according to claim 3, characterized in that: A concentric screw hole (40) is provided at one end of the tape winding shaft (7), and the brake assembly (10) comprises a brake claw (32), a return spring (33), a limit plate (34), and a screw (35). The limit plate (34) is fixed to one end of the tape winding shaft (7) by means of the screw (35) and the concentric screw hole (40). The limit plate (34) rotates synchronously with the tape winding shaft (7). An outer contour tooth is provided on the outer periphery of the brake claw (32) near the coil spring box (92). The brake claw (32) is connected to the limiting plate (34), and the return spring (33) is arranged between the brake claw (32) and the limiting plate (34). One end of the return spring (33) is connected to the limiting plate (34), and the other end is connected to the brake claw (32), so as to provide the brake claw (32) with a force to close to the tape winding shaft (7). A plurality of continuous inner teeth distributed in a circumferential direction are arranged on a circle of annular inner wall of the winding spring box (92) facing the brake claw (32).

7. The intelligent safety control belt tightening device according to claim 3, characterized in that: An eccentric shaft is provided at one end of the winding shaft (7), and the brake assembly (10) includes a brake disc (36) and a compression spring (37). A groove (38) is provided on the brake disc (36), and an outer contour flange (39) is provided on the outer periphery of the brake disc (36) close to the winding spring box (92). The brake disc (36) is connected to the eccentric shaft on the winding shaft (7), and the compression spring (37) is installed in the groove (38), with one end abutting against the brake disc (36) and the other end abutting against the eccentric shaft of the winding shaft (7). The brake disc (36) rotates synchronously with the winding shaft (7).

8. An intelligent safety control belt tightening device according to any one of claims 4 to 7, characterized in that: A front cover (18) is provided at one end of the base (6) close to the long webbing (3); a webbing channel (19) is reserved on the front cover (18) for the long webbing (3) to pass through, and symmetrical limiting walls (20) are provided; a symmetrical, strip-shaped limiting opening (21) is provided at the bottom of the base (6); the limiting walls (20) and the limiting opening (21) cooperate to limit the handle (4) to prevent the side of the handle (4) from interfering with the ratchet (5).

9. The intelligent safety control belt tightening device according to claim 8, characterized in that: The long webbing (3) is connected with a hook (22), the front cover (18) is located at one end of the base (6), and the webbing channel (19) thereon extends toward the other end of the base (6) and is in a constricted shape for clamping one end of the hook (22).

10. The intelligent safety control belt tightening device according to claim 9, characterized in that: A safety mechanism (23) is arranged at the opening of the hook (22), and the safety mechanism (23) comprises a return spring (24) and a safety sleeve (25). The return spring (24) is mounted on the hook (22), and the safety sleeve (25) is sleeved on the return spring (24). Under the action of the return spring (24), the opening of the hook (22) is elastically closed.

11. The intelligent safety control belt tightening device according to claim 10, characterized in that: A detachable connecting shaft (26) is provided on the end of the base (6) opposite to the long webbing (3), and one or more of a short webbing, a hook, a buckle and a fixed mounting plate are connected to the connecting shaft (26).

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