Safety tensioning device with stop mechanism

Abstract

This invention relates to the field of tensioner technology, providing a safety tensioning device with a stop mechanism, including a housing with a front cover fixed to the outer side of one end. The invention features a stop structure. In its normal state, the contact surface presses against the ratchet and they rotate in a circular motion. When the movable pawl button is pressed, the movable pawl's support angle presses against the brake pad, causing the contact surface to disengage from the ratchet. The long strap can then be smoothly retracted under the elastic force of the power source worm spring. Releasing the movable pawl button causes the brake pad to brake the ratchet under the force of the brake return spring, preventing retraction. Under the elastic force of the movable pawl return spring, the movable pawl button engages with the ratchet, preventing reverse rotation. Under the elastic force of the brake return spring, the contact surface engages with the ratchet teeth, providing secondary locking. By controlling the retraction and extension of the long strap, the first hook is prevented from springing up and causing injury, thereby improving safety.

Description

Technical Field

[0001] This invention relates to the field of tensioner technology, and in particular to a safety tensioning device with a stop mechanism. Background Technology

[0002] A tensioner is a device used to adjust and secure the tension of ropes, chains, belts, or fabrics. It is mainly used in scenarios such as cargo securing, conveying systems, or safety restraints to achieve reliable and stable tension maintenance and prevent loosening or rebound caused by external forces. By controlling the release and retraction of long straps, it prevents hooks from springing up and injuring people, thereby ensuring safety. Therefore, a safety tensioning device with a stop mechanism is used. To this end, patent CN117338096A discloses a releasable locking device for seat belt buckles, relating to the field of seat belt technology. It includes a releasable locking mechanism for detachably connecting seat belt buckles and fasteners. The releasable locking mechanism comprises a first connecting member, a second connecting member, and a locking assembly. The first connecting member and the second connecting member are detachably connected. The locking assembly includes a locking element and a drive mechanism pulsatingly connected to the locking element. The locking element can move to a locking position to lock the first connecting member and the second connecting member into a connected state. The drive mechanism can drive the locking element to slide away from the locking position, thereby disengaging the first connecting member and the second connecting member. When a vehicle accident occurs, this invention can promptly release the locking state of the first connecting member and the second connecting member, allowing the seat belt buckle to disengage smoothly from the fastener, thus enabling rapid evacuation of occupants. Although the aforementioned releasable locking device for seat belt buckles can promptly release the locking state of the first and second connecting parts, allowing the seat belt buckle to disengage smoothly from the fixing parts and thus enabling personnel to escape quickly, this device is not very applicable in use because it is inconvenient to stop and prevent loosening due to external force, vibration or misoperation. Summary of the Invention

[0003] The purpose of this invention is to provide a safety tensioning device with a stop mechanism to solve the problem that existing safety tensioning devices are inconvenient to stop.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a safety tensioning device with a stop mechanism, comprising a housing; A front cover is fixed to the outer side of one end of the housing, and a long strap is provided on one side inside the housing. A fixing structure is provided on the top of the casing; A stop structure is provided on one side of the top of the housing. The stop structure includes a fixed handle on one side of the top of the housing. A movable pawl button is rotatably connected inside the fixed handle. Movable pawl support angles are fixed on both sides of one end of the movable pawl button. Movable pawl return springs are fixed on both sides of the movable pawl button. A brake pad is rotatably connected to one side of the inside of the fixed handle. Abutment surfaces are fixed at both ends of one side of the brake pad. Brake return springs are fixed at both ends of the other side of the brake pad. One end of the movable pawl support angle abuts against the outer side of the brake pad. One end of the brake return spring is fixedly connected to one side of the fixed handle.

[0005] Preferably, the housing has a "U" shaped design. In the normal state, the contact surface presses against the ratchet and rotates in a circular motion. When the movable pawl button is pressed, the movable pawl's support angle presses against the brake pad, causing the contact surface to disengage from the ratchet. The long strap can then be smoothly retracted under the elastic force of the power source worm spring. When the movable pawl button is released, the brake pad, under the force of the brake return spring, brakes the ratchet, preventing retraction. Under the elastic force of the movable pawl return spring, the movable pawl button engages with the ratchet, preventing reverse rotation. Furthermore, under the elastic force of the brake return spring, the contact surface fits against the ratchet teeth, providing a second layer of friction locking, thereby improving safety.

[0006] Preferably, one end of the long strap extends to the outside of the housing and is fixed with a first hook.

[0007] Preferably, the fixing structure includes a tape reel, a drum, a ratchet, a first bushing, a baffle, a first return spring, a limiting plate, a housing, a power source worm spring, a second bushing, and a mounting hole. The mounting hole extends through the top of the housing, and the tape reel passes through the interior of the mounting hole. The first bushing is fitted on the outer side of one end of the tape reel, and the second bushing is fitted on the outer side of the other end of the tape reel. The drum is fitted on the outer side of the tape reel, and ratchet is fixed at both ends of the drum. A power source worm spring is fixed on the outer wall of the tape reel on one side of the second bushing, and a housing is provided on the outer side of the power source worm spring. A baffle is provided on one side inside the housing, and the first return spring is fitted on the outer side of one end of the baffle. A limiting plate is fitted on the outer side of the baffle at one end of the first return spring.

[0008] Preferably, the outer side of the roll contacts the inner side of the long strap, and the outer side of the ratchet abuts against one end of the contact surface.

[0009] Preferably, the baffle and the housing form a sliding structure, and the baffle and the limiting plate form a sliding structure.

[0010] Preferably, both ends of the limiting plate extend into the interior of the machine housing, and one end of the baffle abuts against one side of the ratchet. The tape reel engages with the machine housing via a first bushing and a second bushing to ensure smooth rotation and prevent axial movement. A long strap is wound around the drum. When the ratchet rotates clockwise, the drum, coaxial with the ratchet, synchronously winds up the long strap, gradually tightening it and applying tension to the object being fixed. Reversing the rotation releases the tape.

[0011] Preferably, one side of the cover is fixedly connected to the outer wall of the housing, and the winding shaft and the fixed handle constitute a rotating structure. The ratchet is a one-way lock, allowing only forward rotation. When rotating in the reverse direction, it is engaged with the ratchet by the baffle, achieving a mechanical self-locking mechanism that only moves forward and never backward. Under the elastic force of the first return spring, the baffle is provided with pre-tightening force and return force. In the normal state, the baffle is pressed against the ratchet, keeping it engaged with the ratchet. After unlocking, the baffle is automatically pushed back to its original position, restoring the locked state.

[0012] Preferably, a disassembly structure is fixed to one side of the bottom of the housing. This disassembly structure includes a short strap, a bottom hole, a short strap shaft, and a fixing bolt. The short strap shaft extends through one side of the bottom of the housing, and a short strap is fitted onto the outer side of the short strap shaft. A bottom hole extends through one side of the bottom of the housing, and a fixing bolt passes through the interior of the bottom hole. One end of the short strap is fixed to the outer side of the short strap shaft and connected to the housing. With the action of the second hook, it is used to hook and connect the bundled object or fixed point. With the cooperation of the long strap, the entire structure is tightened and fixed.

[0013] Preferably, a second hook is fixed to the end of the short strap away from the short strap shaft. By removing the short strap shaft and the short strap, the fixing bolt passes through the bottom hole. Under the action of the fixing bolt, the housing is fixed to the object, thereby enabling the housing to be used in a fixed manner. By replacing the fixing bolt or the short strap, two uses can be achieved, improving the flexibility and adaptability of the tensioning device during use.

[0014] The present invention provides a safety tensioning device with a stop mechanism, the advantages of which are: With a stop structure, in normal operation, the contact surface presses against the ratchet and they rotate together. When the movable pawl button is pressed, the movable pawl's support angle presses against the brake pad, causing the contact surface to disengage from the ratchet. The long strap can then be smoothly retracted under the elastic force of the power source worm spring. When the movable pawl button is released, the brake pad brakes the ratchet under the force of the brake return spring, preventing the stop from retracting. Under the elastic force of the movable pawl return spring, the movable pawl button engages with the ratchet, preventing reverse rotation. Furthermore, under the elastic force of the brake return spring, the contact surface fits against the ratchet teeth, providing a second layer of friction locking, thereby improving safety. With a fixed structure, the tape reel engages with the machine housing via a first and second bushing to ensure smooth rotation and prevent axial movement. The tape is wound around the drum. When the ratchet rotates clockwise, the drum, coaxial with the ratchet, simultaneously winds up the tape, gradually tightening it and applying tension to the object being fixed. Reversing the rotation releases the tape. The ratchet is a one-way lock, allowing only forward rotation. When rotating in the reverse direction, the baffle engages the ratchet, achieving a mechanical self-locking mechanism that only allows forward movement. Under the elastic force of the first return spring, the baffle is provided with pre-tightening and return force. Under normal conditions, the baffle is pressed against the ratchet, keeping it engaged with the ratchet. After unlocking, the baffle is automatically pushed back to its original position, restoring the locked state. With a detachable structure, one end of the short strap is fixed to the outside of the short strap shaft and connected to the machine housing. Under the action of the second hook, it is used to hang and connect the bundled object or fixed point. With the cooperation of the long strap, the whole is tightened and fixed. Furthermore, by removing the short belt shaft and short strap, the fixing bolt passes through the bottom hole. Under the action of the fixing bolt, the housing is fixed to the object, thus enabling the housing to be used in a fixed manner. By replacing the fixing bolt or the short strap, two functions can be achieved, improving the flexibility and adaptability of the tensioning device during use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front-view exploded three-dimensional structural schematic diagram of the present invention; Figure 3 This is a front view exploded three-dimensional structural diagram of the fixed structure of the present invention; Figure 4 This is a front view exploded three-dimensional structural diagram of the stop structure of the present invention; Figure 5 This is a front view exploded three-dimensional structural diagram of the disassembly structure of the present invention; Figure 6 This is a partial exploded three-dimensional structural diagram of the disassembly structure of the present invention. Figure 7 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 10 This is a side view of the structure of the present invention.

[0016] The reference numerals in the diagram are as follows: 1. Housing; 2. Front cover; 3. Long strap; 4. Fixing structure; 41. Belt shaft; 42. Drum; 43. Ratchet; 44. First bushing; 45. Baffle; 46. First return spring; 47. Limiting plate; 48. Housing cover; 49. Power source worm spring; 410. Second bushing; 411. Mounting hole; 5. Stop structure; 52. Fixed handle; 53. Brake return spring; 54. Brake pad; 55. Movable pawl button; 56. Movable pawl return spring; 58. Contact surface; 59. Movable pawl support angle; 6. Disassembly structure; 61. Short strap; 62. Bottom hole; 63. Short belt shaft; 64. Fixing bolt. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-10 The present invention provides a safety tensioning device with a stop mechanism, comprising a housing 1, a front cover 2 fixed to the outer side of one end of the housing 1, a long strap 3 provided on one side inside the housing 1, and a fixing structure 4 provided on the top of the housing 1. The fixing structure 4 includes a winding shaft 41, a drum 42, a ratchet 43, a first bushing 44, a baffle 45, a first return spring 46, a limiting plate 47, a cover 48, a power source worm spring 49, a second bushing 410, and a mounting hole 411. The mounting hole 411 extends through the top of the housing 1, and the winding shaft 41 extends through the interior of the mounting hole 411. The first bushing 44 is sleeved on the outer side of one end of the winding shaft 41, and the second bushing 410 is sleeved on the outer side of the other end of the winding shaft 41. The drum 42 is sleeved on the outer side of the winding shaft 41, and ratchet 43 is fixed at both ends of the drum 42. The outer side of the winding shaft 41 on one side of the second bushing 410... A power source worm spring 49 is fixed on the wall, and a cover 48 is provided on the outside of the power source worm spring 49. A baffle 45 is provided on one side of the inside of the housing 1. A first return spring 46 is sleeved on the outside of one end of the baffle 45. A limiting plate 47 is sleeved on the outside of the baffle 45 at one end of the first return spring 46. The outside of the drum 42 contacts the inside of the long strap 3. The outside of the ratchet 43 abuts against one end of the contact surface 58. The baffle 45 and the housing 1 form a sliding structure. The baffle 45 and the limiting plate 47 form a sliding structure. Both ends of the limiting plate 47 extend into the inside of the housing 1. One end of the baffle 45 abuts against one side of the ratchet 43. One side of the cover 48 is fixedly connected to the outer wall of the housing 1. The winding shaft 41 and the fixed handle 52 form a rotating structure. The housing 1 has a "U" shape design. One end of the long strap 3 extends to the outside of the housing 1 and is fixed with a first hook.

[0019] Reference Figure 2 , Figure 3 and Figure 8 As shown, the tape reel 41 is engaged with the housing 1 through the first bushing 44 and the second bushing 410 to ensure smooth rotation and prevent axial movement. The tape is wound around the drum 42 by the long strap 3. When the ratchet 43 rotates clockwise, the drum 42, which is coaxial with the ratchet 43, simultaneously winds up the long strap 3, gradually tightening it and applying tension to the object being fixed. Reversing the rotation releases the tape. The ratchet 43 is a one-way lock, allowing only forward rotation. When rotating in the reverse direction, it is engaged with the baffle 45, achieving a mechanical self-locking mechanism that only moves forward and never backward. Under the elastic force of the first return spring 46, the baffle 45 is provided with pre-tightening force and return force. Under normal conditions, the baffle 45 is pressed against the ratchet 43 to keep it engaged with the ratchet 43. After unlocking, the baffle 45 is automatically pushed back to reset, restoring the locked state.

[0020] A stop structure 5 is provided on one side of the top of the housing 1. The stop structure 5 includes a fixed handle 52 located on one side of the top of the housing 1. A movable pawl button 55 is rotatably connected inside the fixed handle 52. Movable pawl support angles 59 are fixed on both sides of one end of the movable pawl button 55. Movable pawl return springs 56 are fixed on both sides of the movable pawl button 55. A brake pad 54 is rotatably connected to one side of the inside of the fixed handle 52. A contact surface 58 is fixed at both ends of one side of the brake pad 54. A brake return spring 53 is fixed at both ends of the other side of the brake pad 54. One end of the movable pawl support angle 59 abuts against the outer side of the brake pad 54. One end of the brake return spring 53 is fixedly connected to one side of the fixed handle 52.

[0021] Reference Figure 2 , Figure 4 and Figure 9 As shown, in the normal state, the contact surface 58 presses against the ratchet 43 and rotates together. When the movable pawl button 55 is pressed, the movable pawl support angle 59 presses against the brake pad 54 and rotates, causing the contact surface 58 to disengage from the ratchet 43. The long strap 3 can be smoothly retracted under the elastic force of the power source worm spring 49. When the movable pawl button 55 is released, the brake pad 54 brakes the ratchet 43 under the force of the brake return spring 53, preventing the retraction of the stop. Under the elastic force of the movable pawl return spring 56, the movable pawl button 55 engages with the ratchet 43, preventing reverse rotation. Furthermore, under the elastic force of the brake return spring 53, the contact surface 58 and the tooth surface of the ratchet 43 are in contact, providing a second layer of friction locking. By controlling the retraction and extension of the long strap 3, the first hook is prevented from jumping up and injuring people, thereby improving safety.

[0022] A disassembly structure 6 is fixed to one side of the bottom of the housing 1. The disassembly structure 6 includes a short strap 61, a bottom hole 62, a short belt shaft 63, and a fixing bolt 64. The short belt shaft 63 passes through one side of the bottom of the housing 1. The short strap 61 is sleeved on the outside of the short belt shaft 63. The bottom hole 62 passes through one side of the bottom end of the housing 1. The fixing bolt 64 passes through the inside of the bottom hole 62. A second hook is fixed to the end of the short strap 61 away from the short belt shaft 63.

[0023] Reference Figure 2 , Figure 5 and Figure 6 As shown, one end of the short strap 61 is fixed to the outside of the short strap shaft 63 and connected to the housing 1. Under the action of the second hook, it is used to hang and connect the bound object or fixed point. With the cooperation of the long strap 3, the whole is tightened and fixed. By removing the short strap shaft 63 and the short strap 61, the fixing bolt 64 passes through the inside of the bottom hole 62. Under the action of the fixing bolt 64, the housing 1 is fixed to the object, so that the housing 1 can be fixed for use. By replacing the fixing bolt 64 or the short strap 61, one machine can be used for two purposes, which improves the flexibility and adaptability of the tensioning device during use.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safety tensioning device with a stop mechanism, comprising a housing (1); Its features are: A front cover (2) is fixed to the outer side of one end of the housing (1), and a long strap (3) is provided on one side inside the housing (1). The top of the housing (1) is provided with a fixing structure (4); A stop structure (5) is provided on one side of the top of the housing (1). The stop structure (5) includes a fixed handle (52) provided on one side of the top of the housing (1). A movable pawl button (55) is rotatably connected inside the fixed handle (52). Movable pawl support angles (59) are fixed on both sides of one end of the movable pawl button (55). Movable pawl return springs (56) are fixed on both sides of the movable pawl button (55). A brake pad (54) is rotatably connected on one side of the fixed handle (52). A contact surface (58) is fixed at both ends of one side of the brake pad (54). A brake return spring (53) is fixed at both ends of the other side of the brake pad (54). One end of the movable pawl support angle (59) abuts against the outside of the brake pad (54). One end of the brake return spring (53) is fixedly connected to one side of the fixed handle (52).

2. A safety tensioning device with a stop mechanism according to claim 1, characterized in that: The casing (1) is U-shaped.

3. A safety tensioning device with a stop mechanism according to claim 1, characterized in that: One end of the long strap (3) extends to the outside of the housing (1) and is fixed with a first hook.

4. A safety tensioning device with a stop mechanism according to claim 1, characterized in that: The fixing structure (4) includes a winding shaft (41), a drum (42), a ratchet (43), a first bushing (44), a baffle (45), a first return spring (46), a limiting plate (47), a housing (48), a power source worm spring (49), a second bushing (410), and a mounting hole (411). The mounting hole (411) extends through the top of the housing (1), and the winding shaft (41) passes through the interior of the mounting hole (411). The first bushing (44) is sleeved on the outer side of one end of the winding shaft (41), and the second bushing (45) is sleeved on the outer side of the other end of the winding shaft (41). The second bushing (410) has a winding drum (42) sleeved on the outer side of the winding shaft (41). Both ends of the winding drum (42) are fixed with ratchet wheels (43). A power source worm spring (49) is fixed on the outer wall of the winding shaft (41) on one side of the second bushing (410). A housing (48) is provided on the outer side of the power source worm spring (49). A baffle (45) is provided on one side inside the housing (1). A first return spring (46) is sleeved on the outer side of one end of the baffle (45). A limiting plate (47) is sleeved on the outer side of the baffle (45) at one end of the first return spring (46).

5. A safety tensioning device with a stop mechanism according to claim 4, characterized in that: The outer side of the roll (42) contacts the inner side of the long strap (3), and the outer side of the ratchet (43) abuts against one end of the contact surface (58).

6. A safety tensioning device with a stop mechanism according to claim 4, characterized in that: The baffle (45) and the housing (1) form a sliding structure, and the baffle (45) and the limiting plate (47) form a sliding structure.

7. A safety tensioning device with a stop mechanism according to claim 4, characterized in that: Both ends of the limiting plate (47) extend into the interior of the housing (1), and one end of the baffle (45) abuts against one side of the ratchet (43).

8. A safety tensioning device with a stop mechanism according to claim 4, characterized in that: One side of the cover (48) is fixedly connected to the outer wall of the housing (1), and the tape reel (41) and the fixed handle (52) constitute a rotating structure.

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