Safety control fastening device

Abstract

The utility model discloses a safety control fastening device, which relates to the field of tighteners and comprises a tightening frame, a tightening mechanism is arranged in the tightening frame, and a brake component used for driving the tightening mechanism is fixedly mounted on one side of the tightening frame. A second speed reducing mechanism is arranged in the middle of the tightening frame and located between the first speed reducing mechanism and the tightening mechanism. By the adoption of the structure, the tightening mechanism is arranged, the movable braid end is connected with the braid collecting shaft in different modes, for example, the braid ring is connected with the anchor pin in a sleeved mode, the U-shaped pocket is connected with the tongue piece in an inserted mode, the braid ring is connected with the braid penetrating groove in a hung mode and the like, the connection modes are stable and convenient to collect and release the braid, and the movable braid and the braid collecting shaft are stably connected; by arranging a knob switch arranged on the second speed reducing mechanism, the speed reducing pin can be conveniently operated and adjusted no matter the knob switch is matched with a reset coil spring, a pressure spring or other parts, and therefore flexible control over the recovery speed of the movable braid is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of tightening devices, and specifically relates to a safety control fastening device. Background Technology

[0002] Tighteners are used to secure goods during transport, movement, loading, or storage. They are locking, will not fall off, are safe and reliable, lightweight, easy to operate, and protect objects from damage.

[0003] A typical tensioner generally includes a drive handle, a tensioning frame, a ratchet, and long and short webbing. When securing goods, the long and short webbing are fixed in a fixed position (or the long and short webbing can be interconnected). Then, the drive handle is pulled back and forth, which drives the ratchet to rotate via the movable pawl on the drive handle. This, in turn, causes the semi-circular shaft connected to the ratchet to rotate, winding up the webbing until it is taut, thus securing the goods. When it is necessary to untie the goods, simply rotate the drive handle to a specified angle, causing the movable pawl to disengage from the ratchet. The stop pawl on the base assembly is then lifted by the flange of the drive handle's side plate and disengages from the ratchet. At this point, the long webbing can be pulled out, thus untying the goods.

[0004] Current webbing tensioners typically consist of a webbing, a ratchet mechanism, a handle, a base, pawls, and end fittings. For example, an automatic webbing tensioner with announcement number CN221757850U ​​includes a tensioner body on which a webbing is mounted. It also includes: a toothed disc rotatably mounted on the tensioner body; two scrapers slidably mounted on the tensioner body, with the webbing placed between them; and a synchronization component mounted on the tensioner body. This automatic webbing tensioner rotates the toothed disc, causing the scrapers on both sides to move in opposite directions via the synchronization component, simultaneously clamping and pressing against the webbing. The tensioner then automatically retracts the webbing. The webbing is cleaned by contacting and abutting the scrapers, allowing for convenient and quick cleaning of debris from the webbing. The adjustment is simple, allowing for easy switching of the distance between the two scrapers, ensuring that debris does not affect the tensioner and thus its subsequent use.

[0005] However, the aforementioned tensioners are generally connected to the take-up shaft of the movable webbing, which is usually cylindrical. This makes installation and connection inconvenient, and the speed of the movable webbing cannot be controlled during winding. Even if there is a control structure, the tension is controlled by a single friction or meshing method, which is prone to slippage or over-tightening. Over-tightening will cause jamming when the webbing is loosened. If slippage occurs, it will cause safety problems for personnel when the webbing is retracted. Therefore, a safe tensioning device is needed. Utility Model Content

[0006] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a safety control fastening device to solve the problems of inconvenience in connecting the take-up shaft and the webbing and the inability to adjust the webbing take-up speed.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] A safety control fastening device includes a tightening frame. A first through hole is symmetrically opened at one end of the tightening frame, and a second through hole is symmetrically opened at the end of the tightening frame away from the first through hole. A first deceleration mechanism is installed inside the second through hole. A drive handle is pivotally installed on the outside of the first deceleration mechanism. A tightening mechanism is provided inside the tightening frame, and a movable webbing is wound onto the tightening mechanism, passing through the first deceleration mechanism. A brake assembly for driving the tightening mechanism is fixedly installed on one side of the tightening frame, and a fixed webbing is fixedly connected to the end of the tightening frame away from the first deceleration mechanism.

[0009] As a preferred technical solution, the first deceleration mechanism includes a pair of semi-circular shafts passing through the second through hole, a limiting plate, a semi-circular hole, a fixing sleeve, a connecting shaft, and a rotating knob. The semi-circular holes correspond to the semi-circular shafts, and a pair of them are opened in the middle of the limiting plate. Both ends of the pair of semi-circular shafts are inserted into the limiting plate through the semi-circular holes. A gap is formed between the two semi-circular shafts for the movable webbing to pass through. The fixing sleeve is sleeved on one end of the pair of semi-circular shafts, and the rotating knob is sleeved on the other end of the pair of semi-circular shafts. The interiors of the fixing sleeve, the rotating knob, and the semi-circular shafts are all connected through the limiting plate by the connecting shaft. The movable webbing passes through the gap between the semi-circular shafts and is wound around the tightening mechanism.

[0010] As a preferred technical solution, a second deceleration mechanism is provided in the middle of the tightening frame between the first deceleration mechanism and the tightening mechanism, and the movable webbing passes through the second deceleration mechanism.

[0011] As a preferred technical solution, the second deceleration mechanism includes a deceleration pin, a reset coil spring, a rotary switch, and a first retaining ring. The deceleration pin passes through the tightening frame and rotates within the tightening frame at a certain angle. A notch for the movable webbing to pass through is provided in the middle of the deceleration pin, and one end of the notch is open. The reset coil spring is sleeved on the outside of the deceleration pin, and one end of the reset coil spring overlaps and is secured to the outside of the tightening frame. The rotary switch is fixedly installed on the end of the deceleration pin away from the reset coil spring, and the end of the deceleration pin passes through the rotary switch. The first retaining ring is sleeved on the outside of the deceleration pin passing through the rotary switch.

[0012] As a preferred technical solution, the second deceleration mechanism includes a deceleration pin, a rotary switch, a first retaining ring, a pressure spring, a shift pin, and shift holes. The deceleration pin passes through the tightening frame and rotates within the tightening frame. A notch for the movable webbing is provided in the middle of the deceleration pin, and one end of the notch is open. The pressure spring is sleeved on the outside of the deceleration pin. The rotary switch is fixedly installed on the end of the deceleration pin away from the pressure spring, and the first retaining ring is fixedly connected to the end of the deceleration pin through the rotary switch. A cylindrical shift pin is formed on the side of the rotary switch near the tightening frame. Multiple shift holes are provided on the side wall of the tightening frame corresponding to the shift pins.

[0013] As a preferred technical solution, the second deceleration mechanism includes a deceleration pin, a first retaining ring, and a damping spring. The deceleration pin passes through the tightening frame and rotates within the tightening frame. A notch is provided in the middle of the deceleration pin for the movable webbing to pass through, and one end of the notch is open. The damping spring is sleeved on the outside of the deceleration pin and is disposed between the deceleration pin and the side wall of the tightening frame. The first retaining ring is sleeved on the end of the deceleration pin away from the damping spring.

[0014] As a preferred technical solution, the second deceleration mechanism includes a deceleration pin, a first retaining ring, and a fixing hole. The deceleration pin has a notch in the middle for the movable webbing to pass through, and one end of the deceleration pin notch is open. A fixing hole is provided on one side of the tightening frame corresponding to the notch at the open end of the deceleration pin. The end of the deceleration pin with the open notch is inserted into the fixing hole, and the first retaining ring is sleeved on the end of the deceleration pin with the open notch.

[0015] As a preferred technical solution, the tightening mechanism includes a take-up shaft, a power connector, a bushing, a second retaining ring, a flange, a tapered groove, and an anchor pin. The take-up shaft is rotatably installed inside the tightening frame. The power connector is integrally connected to one end of the take-up shaft and is connected to the brake assembly. The flange is integrally located at one end of the take-up shaft. A bushing is provided at the connection between the other end of the take-up shaft and the tightening frame. The second retaining ring is sleeved on the end of the take-up shaft near the outer side of the bushing. The tapered groove is formed on the take-up shaft. The anchor pin is fixedly installed inside the tapered groove. The end of the movable webbing is wrapped around the anchor pin.

[0016] As a preferred technical solution, the tightening mechanism includes a take-up shaft, a power connector, a bushing, a second retaining ring, a flange, and a tongue. The take-up shaft is rotatably installed inside the tightening frame. The power connector is integrally connected to one end of the take-up shaft and is connected to the brake assembly. The flange is integrally located at one end of the take-up shaft. A bushing is provided at the connection between the other end of the take-up shaft and the tightening frame. The second retaining ring is sleeved on the end of the take-up shaft near the outer side of the bushing. A rectangular groove is formed on the surface of the take-up shaft, and the tongue is fixedly installed on the surface of the groove.

[0017] As a preferred technical solution, the tightening mechanism includes a take-up shaft, a power connector, a bushing, a second retaining ring, a flange, a through groove, and a belt threading groove. The take-up shaft is rotatably installed inside the tightening frame. The power connector is integrally connected to one end of the take-up shaft and is connected to the brake assembly. The flange is integrally disposed at one end of the take-up shaft. A bushing is provided at the connection between the other end of the take-up shaft and the tightening frame. The second retaining ring is sleeved on the end of the take-up shaft near the outer side of the bushing. A rectangular through groove is formed inside the take-up shaft. The belt threading groove is on the surface of the take-up shaft and is connected to the rectangular through groove.

[0018] In summary, the present invention has the following main advantages:

[0019] First, by setting up a tightening mechanism, the movable webbing end can be connected to the take-up shaft in different ways, such as using a webbing loop to attach an anchor pin, inserting a U-shaped pocket into a tongue, or hooking a webbing loop into a threading groove. These connection methods are both stable and convenient for taking up and down the webbing, making the connection between the movable webbing and the take-up shaft secure. Moreover, setting an anchor pin, or inserting a U-shaped pocket into a tongue, or hooking a webbing loop into a threading groove, helps with the installation and removal of the movable webbing, increasing the efficiency of the movable webbing installation and removal.

[0020] Secondly, the rotary switch equipped with the second deceleration mechanism, whether in conjunction with the reset coil spring, pressure spring, or other components, allows for convenient operation and adjustment of the deceleration pin, thereby enabling flexible control of the webbing retraction speed. Furthermore, some deceleration mechanisms, through the setting of stop pins and stop holes, allow for adjustment of the rotation angle of the deceleration pin, making operation more precise and convenient. The second deceleration mechanism has various structural forms, allowing users to further enhance the control of webbing retraction based on specific usage scenarios and requirements for webbing movement speed and tension control. This prevents problems caused by webbing slippage or jamming during retraction, and allows for the selection of a suitable deceleration mechanism, making the device more versatile. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0022] Figure 2 This is an exploded structural diagram of Embodiment 1 of this utility model;

[0023] Figure 3 This is a cross-sectional structural schematic diagram of Embodiment 1 of this utility model;

[0024] Figure 4 This is a schematic diagram of the second deceleration mechanism in Embodiment 1 of this utility model;

[0025] Figure 5 This is a schematic diagram of the winding mechanism structure of Embodiment 1 of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the second deceleration mechanism of this utility model;

[0027] Figure 7 This is a schematic diagram of the structure of Embodiment 3 of the second deceleration mechanism of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of Embodiment 4 of the second deceleration mechanism of this utility model;

[0029] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the tightening mechanism of this utility model;

[0030] Figure 10 This is a schematic diagram of the structure of embodiment 3 of the tightening mechanism of this utility model.

[0031] Reference numerals: 1. Tightening frame; 2. First through hole; 3. Second through hole; 4. First deceleration mechanism; 41. Semi-circular shaft; 42. Limiting plate; 43. Semi-circular hole; 44. Fixing sleeve; 45. Connecting shaft; 46. Rotary knob; 5. Drive handle; 6. Tightening mechanism; 61. Take-up shaft; 62. Power connector; 63. Bushing; 64. Second retaining ring; 65. Flange; 66. Tapered groove; 67. Anchor pin; 68. Tongue; 69. Through groove; 610. Threading groove; 7. Movable webbing; 8. Brake assembly; 9. Fixing webbing; 10. Second deceleration mechanism; 101. Deceleration pin; 102. Return coil spring; 103. Rotary switch; 104. First retaining ring; 105. Pressure spring; 106. Gear pin; 107. Gear hole; 108. Damping spring; 109. Fixing hole. Detailed Implementation

[0032] Example 1

[0033] refer to Figures 1 to 5This embodiment of a safety control fastening device includes a tightening frame 1. A first through hole 2 is symmetrically opened at one end of the tightening frame 1, and a second through hole 3 is symmetrically opened at the end of the tightening frame 1 away from the first through hole 2. A first deceleration mechanism 4 is installed inside the second through hole 3. A drive handle 5 is pivotally installed on the outside of the first deceleration mechanism 4. A tightening mechanism 6 is provided inside the tightening frame 1. A movable webbing 7 is wound onto the tightening mechanism 6 and passes through the first deceleration mechanism 4. A brake assembly 8 for driving the tightening mechanism 6 is fixedly installed on one side of the tightening frame 1. A fixed webbing 9 is fixedly connected to the end of the tightening frame 1 away from the first deceleration mechanism 4. By setting the first deceleration mechanism 4 and the tightening mechanism 6, the installation and removal of the movable webbing 7 are facilitated. Multiple installation methods for the movable webbing 7 increase the applicability of this device. The drive handle 5 and brake assembly 8 in this device are both prior art; refer to patent publication number CN222629196U entitled "Handle Assembly and Spring Assembly in an Intelligent Safety Control Tightening Device," which will not be elaborated further here.

[0034] refer to Figure 2 The first deceleration mechanism 4 includes a pair of semi-circular shafts 41 passing through the second through hole 3, a limiting plate 42, a semi-circular hole 43, a fixing sleeve 44, a connecting shaft 45, and a rotating knob 46. A pair of semi-circular holes 43 and semi-circular shafts 41 are correspondingly provided in the middle of the limiting plate 42. Both ends of the pair of semi-circular shafts 41 are inserted into the limiting plate 42 through the semi-circular holes 43. The limiting plate 42 is located on both outer sides of the tightening frame 1. A gap is formed between the two semi-circular shafts 41 for the movable webbing 7 to pass through. The fixing sleeve 44... A fixed sleeve 44 is fitted onto one end of a pair of semi-circular shafts 41, and a rotating knob 46 is fitted onto the other end of the pair of semi-circular shafts 41. The interiors of the fixed sleeve 44, the rotating knob 46, and the semi-circular shafts 41 are all connected by a connecting shaft 45. The pair of semi-circular shafts 41, with their semi-circular cross-sections, are inserted into the semi-circular holes 43 of the limiting plate 42 to form an adjustable webbing channel. The limiting plate 42 is located on both sides of the tightening frame 1 and axially limits the semi-circular shafts 41 through the semi-circular holes 43 to prevent them from detaching from the tightening frame 1.

[0035] refer to Figure 4A second deceleration mechanism 10 is located in the middle of the tightening frame 1, between the first deceleration mechanism 4 and the tightening mechanism 6. A movable webbing 7 passes through the second deceleration mechanism 10. The second deceleration mechanism 10 includes a deceleration pin 101, a return spring 102, a rotary switch 103, and a first retaining ring 104. The deceleration pin 101 passes through the tightening frame 1 and rotates within it. A notch for the movable webbing 7 is provided in the middle of the deceleration pin 101, and one end of the notch is open. The return spring 102 is sleeved on the outside of the deceleration pin 101, with one end overlapping and locking onto the outside of the tightening frame 1, and the other end locking into the notch of the deceleration pin 101. This creates a locking mechanism, allowing torque between the return spring 102 and the deceleration pin 101. The rotary switch 103 is fixedly installed on the deceleration pin 101 at the end away from the return spring 102. The end of 101 passes through the rotary switch 103. The rotary switch 103 is not only installed and connected to the deceleration pin 101, but the outer side of the rotary switch 103 is also inserted into the inside of one side of the tightening frame 1. The connection is provided with a locking position to facilitate the limiting of the rotary switch 103. The first retaining ring 104 is sleeved on the outer side of the deceleration pin 101 passing through the rotary switch 103. The open notch in the middle of the deceleration pin 101 forms a webbing channel. By rotating the deceleration pin 101, the clamping angle of the notch on the webbing can be changed to achieve tension adjustment. When the rotary switch 103 drives the deceleration pin 101 to rotate, the contact area between the edge of the notch and the webbing changes, generating a difference in friction. The two ends of the return spring 102 are fixed on the tightening frame 1 and the deceleration pin 101 respectively. When the knob is rotated to change the tension, the return spring 102 is twisted and stored. After the knob is released, the spring torque drives the deceleration pin 101 to automatically reset and maintain the preset tension value.

[0036] refer to Figure 5The tightening mechanism 6 includes a take-up shaft 61, a power connector 62, a bushing 63, a second retaining ring 64, a flange 65, a tapered groove 66, and an anchor pin 67. The tapered groove 66 can also be circular, rectangular, triangular, or other shapes. The take-up shaft 61 is rotatably mounted inside the tightening frame 1. The power connector 62 is integrally connected to one end of the take-up shaft 61 and is connected to the brake assembly 8. The flange 65 is integrally located at one end of the take-up shaft 61 and is used to limit the take-up shaft 61 when it is inserted into the tightening frame 1. A bushing 63 is provided at the connection between the other end of the take-up shaft 61 and the tightening frame 1. The second retaining ring 64 is sleeved on the end of the take-up shaft 61 near the outside of the bushing 63, limiting and fixing the take-up shaft 61. The tapered groove 66 is formed in the take-up shaft. On frame 61, anchor pin 67 is fixedly installed inside tapered groove 66. The end of movable webbing 7 passes through tapered groove 66, sleeves and fixes anchor pin 67, and wraps around take-up shaft 61. One end of movable webbing 7 wrapped around anchor pin 67 has a webbing loop, which is sleeved with anchor pin 67. Brake assembly 8 serves as a power source, generating rotational power. Power connector 62 is integrally connected to take-up shaft 61 and is drive-connected to brake assembly 8. In this way, the rotational power generated by brake assembly 8 can be transmitted to take-up shaft 61 through power connector 62, causing take-up shaft 61 to rotate inside tightening frame 1. The end of movable webbing 7 is provided with a webbing loop, which sleeves on anchor pin 67 fixed in tapered groove 66 of take-up shaft 61, thereby fixing the end of movable webbing 7 to take-up shaft 61. When take-up shaft 61 rotates under power drive, movable webbing 7 will gradually wrap around take-up shaft 61, achieving tightening of movable webbing 7.

[0037] Example 2

[0038] refer to Figure 6The second deceleration mechanism 10 includes a deceleration pin 101, a rotary switch 103, a first retaining ring 104, a pressure spring 105, a gear pin 106, and a gear hole 107. The deceleration pin 101 passes through the tightening frame 1 and rotates within the tightening frame 1. A notch for the movable webbing 7 to pass through is provided in the middle of the deceleration pin 101, and one end of the notch is open. The pressure spring 105 is sleeved on the outside of the deceleration pin 101. One end of the gear pin 101 is positioned between the gear pin 1 and the side wall of the tightening frame 1, ensuring that the gear pin 101 always maintains a force away from the tightening frame 1, facilitating the engagement of the gear pin 106 into the gear hole 107 to prevent disengagement. A rotary switch 103 is fixedly mounted on the end of the gear pin 101 away from the pressure spring 105, and the end of the gear pin 101 passes through the rotary switch 103 and is fixedly connected to a first retaining ring 104. A cylindrical gear pin 106 is formed on the side of the rotary switch 103 near the tightening frame 1, and the gear hole 1... Multiple gear pins 106 are provided on the side wall of the tightening frame 1. The end of the deceleration pin 101 away from the rotary switch 103 has a rectangular protrusion for easy twisting. The gear pins 106 and gear holes 107 allow the rotation angle of the deceleration pin 101 to be adjusted by the gear. The movable webbing 7 passes through the open notch in the middle of the deceleration pin 101. When the tightening mechanism 6 drives the movable webbing 7 to move, the deceleration pin 101 will have a certain resistance to the webbing. This is because the deceleration pin 101 and the tightening frame 1 are not completely smooth and there is a certain friction. When the movable webbing 7 passes through the notch, it will rub against the inner wall of the deceleration pin 101, thereby achieving the initial deceleration of the movement speed of the movable webbing 7. The pressure spring 105 is sleeved on the outside of the deceleration pin 101 and is located between one end of the deceleration pin 101 and the side wall of the tightening frame 1. The spring is always in a compressed state and will give the deceleration pin 101 a force away from the side wall of the tightening frame 1. This force ensures that the stop pin 106 on the deceleration pin 101 is tightly engaged in the corresponding stop hole 107 on the side wall of the tightening frame 1, preventing the deceleration pin 101 from accidentally disengaging or rotating arbitrarily. The design of multiple stop holes 107 provides a variety of deceleration levels, allowing operators to precisely adjust the rotation angle of the deceleration pin 101 according to actual needs, such as different object weights or tension requirements, thereby achieving the desired deceleration level for the movable webbing 7.

[0039] refer to Figure 9The tightening mechanism 6 includes a take-up shaft 61, a power connector 62, a bushing 63, a second retaining ring 64, a flange 65, and a tongue 68. The take-up shaft 61 is rotatably mounted inside the tightening frame 1. The power connector 62 is integrally connected to one end of the take-up shaft 61 and is connected to the brake assembly 8. The flange 65 is integrally located at one end of the take-up shaft 61. A bushing 63 is provided at the connection between the other end of the take-up shaft 61 and the tightening frame 1. The second retaining ring 64 is sleeved on the take-up shaft 61 near the outer side of the bushing 63. At one end, a rectangular groove is formed on the surface of the take-up shaft 61. A tongue 68 is fixedly installed on the surface of the groove. The end of the movable webbing 7 is hooked and fixed to the tongue 68 and wrapped around the take-up shaft 61. A U-shaped pocket is provided at the connection between the movable webbing 7 and the take-up shaft 61 corresponding to the tongue 68. The U-shaped pocket at the end of the movable webbing 7 can be inserted into the tongue 68, which facilitates the connection between the movable webbing 7 and the take-up shaft 61. The insertion structure of the tongue 68 and the U-shaped pocket enables quick assembly and disassembly of the movable webbing 7 and the take-up shaft 61 without complicated fixing.

[0040] Example 3

[0041] refer to Figure 7 The second deceleration mechanism 10 includes a deceleration pin 101, a first retaining ring 104, and a damping spring 108. The deceleration pin 101 passes through the tightening frame 1 and rotates within the tightening frame 1. A notch for the movable webbing 7 is provided in the middle of the deceleration pin 101, and one end of the notch is open. The damping spring 108 is sleeved on the outside of the deceleration pin 101 and is located between the deceleration pin 101 and the side wall of the tightening frame 1. The damping spring 108 can increase the resistance when the deceleration pin 101 rotates by clamping it with the deceleration pin 101, thus enabling stepless adjustment of the deceleration pin 101. The first retaining ring 104 is sleeved on the end of the deceleration pin 101 away from the damping spring 108. The damping spring 108 is sleeved on the outside of the deceleration pin 101 and is located between the deceleration pin 101 and the side wall of the tightening frame 1. When the operator rotates the deceleration pin 101, the damping spring 108 is compressed or stretched. Due to the elasticity of the spring itself, a force opposite to the direction of rotation is generated. This force acts on the deceleration pin 101, causing it to experience additional resistance when rotating. By adjusting the rotation angle of the deceleration pin 101, the deformation degree of the damping spring 108 can be changed, thereby changing the magnitude of the resistance it generates. This method of adjusting the resistance by continuously changing the spring deformation achieves stepless adjustment of the deceleration pin 101. The design of the damping spring 108 enables the second deceleration mechanism 10 to achieve stepless adjustment. The operator can flexibly adjust the rotation angle of the deceleration pin 101 according to actual work needs, such as different object weights and tensioning speed requirements, thereby precisely controlling the deceleration degree of the movable webbing 7. Compared with stepped adjustment, stepless adjustment can provide more delicate and precise deceleration control, enabling the safety control fastening device to better adapt to various complex working scenarios.

[0042] refer to Figure 10 The tightening mechanism 6 includes a take-up shaft 61, a power connector 62, a bushing 63, a second retaining ring 64, a through groove 69, and a belt threading groove 610. The take-up shaft 61 is rotatably mounted inside the tightening frame 1. The power connector 62 is integrally connected to one end of the take-up shaft 61 and is connected to the brake assembly 8. A flange 65 is integrally disposed at one end of the take-up shaft 61. A bushing 63 is provided at the connection between the other end of the take-up shaft 61 and the tightening frame 1. The second retaining ring 64 is sleeved on the end of the take-up shaft 61 near the outside of the bushing 63. A rectangular through groove 69 is provided inside the take-up shaft 61, and the belt threading groove 610 is on the surface of the take-up shaft 61 for threading the belt. The groove 610 is connected to the rectangular through groove 69. The movable webbing 7 is wrapped around one end of the take-up shaft 61 and has a webbing ring. The webbing ring can be hooked onto the surface of the take-up shaft 61 through the webbing groove 610, which facilitates the installation of the movable webbing 7. The webbing ring at one end of the movable webbing 7 can be hooked onto the take-up shaft 61 through the webbing groove 610 on the surface of the take-up shaft 61. The webbing groove 610 is connected to the rectangular through groove 69 inside the take-up shaft 61. The webbing ring can enter the rectangular through groove 69 and be further fixed on the take-up shaft 61. When the take-up shaft 61 is rotated under power drive, the movable webbing 7 will be wrapped around the take-up shaft 61, thereby achieving the tightening of the movable webbing 7.

[0043] Example 4

[0044] refer to Figure 8 The second deceleration mechanism 10 includes a deceleration pin 101, a first retaining ring 104, and a fixing hole 109. The deceleration pin 101 has a notch in the middle for the movable webbing 7 to pass through, and one end of the notch of the deceleration pin 101 is open. A fixing hole 109 is provided on one side of the tightening frame 1 corresponding to the notch at the open end of the deceleration pin 101. The end of the deceleration pin 101 with the open notch is inserted into the fixing hole 109. The first retaining ring 104 is sleeved on the end of the deceleration pin 101 with the open notch. The first retaining ring 104 can limit the installation of the deceleration pin 101 and prevent the deceleration pin 101 from falling off the tightening frame 1. The end of the deceleration pin 101 with the open notch is inserted into the fixing hole 109 on the side of the tightening frame 1, so that the deceleration pin 101 can obtain stable support and positioning in the tightening frame 1. At the same time, the first retaining ring 104 sleeved on the end of the deceleration pin 101 with the open notch plays a limiting role. The first retaining ring 104 prevents the deceleration pin 101 from dislodging from the fixing hole 109 during operation, ensuring the stability of the connection between the deceleration pin 101 and the tightening frame 1, and ensuring that the entire second deceleration mechanism 10 can work normally. Through the friction between the movable webbing 7 and the inner wall of the notch of the deceleration pin 101, the speed of the webbing during the tightening or loosening process is reduced, avoiding a series of problems caused by the webbing being too fast.

Claims

1. A safety control fastening device, comprising a tightening frame (1), wherein a first through hole (2) is symmetrically provided at one end of the tightening frame (1), and a second through hole (3) is symmetrically provided at the end of the tightening frame (1) away from the first through hole (2), wherein a first deceleration mechanism (4) is installed inside the second through hole (3), and a drive handle (5) is pivotally installed on the outside of the first deceleration mechanism (4), characterized in that: The tightening frame (1) is provided with a tightening mechanism (6) inside. A movable webbing (7) is rolled up on the tightening mechanism (6). The movable webbing (7) passes through the first deceleration mechanism (4). A brake assembly (8) for driving the tightening mechanism (6) is fixedly installed on one side of the tightening frame (1). A fixed webbing (9) is fixedly connected to one end of the tightening frame (1) away from the first deceleration mechanism (4). A second deceleration mechanism (10) is provided in the middle of the tightening frame (1) between the first deceleration mechanism (4) and the tightening mechanism (6). The movable webbing (7) passes through the second deceleration mechanism (10).

2. The safety control fastening device according to claim 1, characterized in that: The second deceleration mechanism (10) includes a deceleration pin (101), a reset coil spring (102), a rotary switch (103), and a first retaining ring (104). The deceleration pin (101) passes through the tightening frame (1) and rotates at a certain angle in the tightening frame (1). The middle part of the deceleration pin (101) has a notch for passing through the movable webbing (7), and one end of the notch of the deceleration pin (101) is open. The reset coil spring (102) is sleeved on the outside of the deceleration pin (101), and one end of the reset coil spring (102) overlaps and is locked on the outside of the tightening frame (1). The rotary switch (103) is fixedly installed on the end of the deceleration pin (101) away from the reset coil spring (102), and the end of the deceleration pin (101) passes through the rotary switch (103). The first retaining ring (104) is sleeved on the outside of the deceleration pin (101) passing through the rotary switch (103).

3. The safety control fastening device according to claim 1, characterized in that: The second deceleration mechanism (10) includes a deceleration pin (101), a rotary switch (103), a first retaining ring (104), a pressure spring (105), a gear pin (106), and a gear hole (107). The deceleration pin (101) passes through the tightening frame (1) and rotates within the tightening frame (1). A notch for the movable webbing (7) is provided in the middle of the deceleration pin (101), and one end of the notch is open. The pressure spring (105) is sleeved... The rotary switch (103) is fixedly installed on the outside of the deceleration pin (101) at one end away from the pressure spring (105), and the end of the deceleration pin (101) is fixedly connected to the rotary switch (103) with a first retaining ring (104). A cylindrical gear pin (106) is formed on the side of the rotary switch (103) near the tightening frame (1). Multiple gear holes (107) are provided on the side wall of the tightening frame (1) corresponding to the gear pins (106).

4. The safety control fastening device according to claim 1, characterized in that: The second deceleration mechanism (10) includes a deceleration pin (101), a first retaining ring (104), and a damping spring (108). The deceleration pin (101) passes through the tightening frame (1) and rotates within the tightening frame (1). A notch for passing through the movable webbing (7) is provided in the middle of the deceleration pin (101), and one end of the notch of the deceleration pin (101) is open. The damping spring (108) is sleeved on the outside of the deceleration pin (101) and is located between the deceleration pin (101) and the side wall of the tightening frame (1). The first retaining ring (104) is sleeved on the end of the deceleration pin (101) away from the damping spring (108).

5. A safety control fastening device according to claim 1, characterized in that: The second deceleration mechanism (10) includes a deceleration pin (101), a first retaining ring (104), and a fixing hole (109). The deceleration pin (101) has a notch in the middle for the movable webbing (7) to pass through, and one end of the notch of the deceleration pin (101) is open. The tightening frame (1) has a fixing hole (109) on one side corresponding to the notch at the open end of the deceleration pin (101). The end of the deceleration pin (101) with the open notch is inserted into the fixing hole (109), and the first retaining ring (104) is sleeved on the end of the deceleration pin (101) with the open notch.

6. A safety control fastening device according to claim 1, characterized in that: The tightening mechanism (6) includes a take-up shaft (61), a power connector (62), a bushing (63), a second retaining ring (64), a flange (65), a tapered groove (66), and an anchor pin (67). The take-up shaft (61) is rotatably mounted inside the tightening frame (1). The power connector (62) is integrally connected to one end of the take-up shaft (61). The power connector (62) is connected to the brake assembly (8) in a transmission connection. The flange (65) is integrally disposed on the take-up shaft (61). One end of the take-up shaft (61) is provided with a bushing (63) at the connection between the other end of the take-up shaft (61) and the tightening frame (1). The second retaining ring (64) is sleeved on the end of the take-up shaft (61) near the outside of the bushing (63). The tapered groove (66) is opened on the take-up shaft (61). The anchor pin (67) is fixedly installed inside the tapered groove (66). The end of the movable webbing (7) passes through the tapered groove (66) and is sleeved and fixed. The anchor pin (67) is wrapped around the take-up shaft (61).

7. A safety control fastening device according to claim 1, characterized in that: The tightening mechanism (6) includes a take-up shaft (61), a power connector (62), a bushing (63), a second retaining ring (64), a flange (65), and a tongue (68). The take-up shaft (61) is rotatably installed inside the tightening frame (1). The power connector (62) is integrally connected to one end of the take-up shaft (61). The power connector (62) is connected to the brake assembly (8) in a transmission manner. The flange (65) is integrally set at one end of the take-up shaft (61). The other end of the take-up shaft (61) is provided with a bushing (63) at the connection between it and the tightening frame (1). The second retaining ring (64) is sleeved on the end of the take-up shaft (61) near the outside of the bushing (63). A rectangular groove is opened on the surface of the take-up shaft (61). The tongue (68) is fixedly installed on the surface of the groove. The end of the movable webbing (7) is hooked and fixed to the tongue (68) and wrapped around the take-up shaft (61).

8. A safety control fastening device according to claim 1, characterized in that: The tightening mechanism (6) includes a take-up shaft (61), a power connector (62), a bushing (63), a second retaining ring (64), a flange (65), a through groove (69), and a threading groove (610). The take-up shaft (61) is rotatably installed inside the tightening frame (1). The power connector (62) is integrally connected to one end of the take-up shaft (61). The power connector (62) is connected to the brake assembly (8) in a transmission manner. The flange (65) is integrally set at one end of the take-up shaft (61). The other end of the take-up shaft (61) is provided with a bushing (63) at the connection between it and the tightening frame (1). The second retaining ring (64) is sleeved on the end of the take-up shaft (61) near the outside of the bushing (63). A rectangular through groove (69) is opened inside the take-up shaft (61). The threading groove (610) is on the surface of the take-up shaft (61), and the threading groove (610) is connected to the rectangular through groove (69).

9. A safety control fastening device according to claim 1, characterized in that: The first deceleration mechanism (4) includes a pair of semi-circular shafts (41) passing through the second through hole (3), a limiting plate (42), a semi-circular hole (43), a fixing sleeve (44), a connecting shaft (45), and a rotating knob (46). The semi-circular hole (43) corresponds to the semi-circular shaft (41) and is provided in the middle of the limiting plate (42). Both ends of the pair of semi-circular shafts (41) are inserted into the limiting plate (42) through the semi-circular hole (43). A gap is formed between 41) for the passage of the movable webbing (7). The fixed sleeve (44) is fitted onto one end of a pair of semi-circular shafts (41), and the rotating knob (46) is fitted onto the other end of a pair of semi-circular shafts (41). The interiors of the fixed sleeve (44), the rotating knob (46), and the semi-circular shafts (41) are all connected by a connecting shaft (45). The movable webbing (7) passes through the gap between the semi-circular shafts (41) and is wound around the tightening mechanism (6).

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