Automatic take-up tensioner

Abstract

The utility model relates to the technical field of tensioner, especially an automatic take up tensioner, including fixed part, swing part and positioning shaft, the fixed part with positioning shaft rotatable connection, swing part with positioning shaft rotatable connection, the positioning shaft is fixedly installed with ratchet, the fixed part is equipped with the first locking portion with the cooperation of ratchet, swing part is equipped with the second locking portion with the cooperation of ratchet, still include: automatic winding mechanism, establishes in fixed part one side, is used for driving positioning shaft automatic reset, damping mechanism provides damping for automatic winding mechanism, rotatable installation has the rotation axis on the fixed part. The utility model has the advantages of: when the bandage (first bandage / second bandage) release, the rotation of positioning shaft is synchronous and tight spring, stores the elastic potential energy. Once the hook unloads (such as after unloading), spring releases energy immediately, automatically drives the rotation of positioning shaft, realizes the full automatic quick recovery of bandage.

Description

Technical Field

[0001] This utility model relates to the field of tensioner technology, and in particular to an automatic belt tensioner. Background Technology

[0002] Traditional ratchet-type strap tensioners (commonly used in areas such as cargo binding and tarpaulin securing) mainly rely on manual operation to tighten and lock the straps, such as the strap tensioner proposed in announcement number CN218908317U.

[0003] Traditional tensioners require manual winding and retraction of the long straps after release, a time-consuming and laborious process.

[0004] To address this issue, this utility model proposes an automatic belt tensioner. Utility Model Content

[0005] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0006] Therefore, one objective of this utility model is to provide an automatic belt tensioner to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0007] To achieve the above objectives, one embodiment of this utility model provides an automatic belt tensioner, including a fixing member, a swing member, and a positioning shaft. The fixing member is rotatably connected to the positioning shaft, and the swing member is rotatably connected to the positioning shaft. A ratchet is fixedly mounted on the positioning shaft. The fixing member has a first locking part that cooperates with the ratchet, and the swing member has a second locking part that cooperates with the ratchet. The device also includes: an automatic winding mechanism located on one side of the fixing member for driving the positioning shaft to automatically reset; and a damping mechanism for providing damping for the automatic winding mechanism.

[0008] Preferably, in any of the above embodiments, a rotating shaft is rotatably mounted on the fixing member, and a first strap is provided on the rotating shaft.

[0009] Preferably, in any of the above embodiments, a through groove is provided on the positioning shaft, and a second strap is provided in the through groove.

[0010] Preferably, in any of the above embodiments, the fixing member has a first guide groove, the fixing member has a first positioning plate, and the first positioning plate has a first connecting groove; the swing member has a second guide groove, the swing member has a second positioning plate, and the second positioning plate has a second connecting groove.

[0011] Preferably, in any of the above embodiments, the first locking part includes: a first sliding plate, slidably disposed in a first guide groove, one end of which is fixedly provided with a first ratchet plate that engages with a ratchet, and the other end of which is fixedly provided with a first extension plate, the first extension plate being slidably disposed in a first connecting groove, and the first sliding plate having a buckle groove; a first spring, sleeved on the first extension plate, one end of which is fixedly connected to a first positioning plate, and the other end of which remains in contact with the first sliding plate; the second locking part includes: a second sliding plate, slidably disposed in a second guide groove, one end of which is fixedly provided with a second ratchet plate that engages with a ratchet, and the other end of which is fixedly provided with a second extension plate, and the second sliding plate also having an operating plate fixedly provided; a second spring, sleeved on the second extension plate, one end of which is fixedly connected to a second positioning plate, and the other end of which remains in contact with the second sliding plate.

[0012] Preferably, according to any of the above solutions, the automatic winding mechanism includes: a fixed chamber, which is fixedly connected to a fixing member via a support block; a coil spring, which is disposed inside the fixed chamber, with its fixed end fixedly connected to the inner wall of the fixed chamber, and a cylindrical rod fixedly installed on its movable end, the cylindrical rod passing through the fixed chamber and fixedly connected to a positioning shaft.

[0013] Preferably, according to any of the above embodiments, the damping mechanism includes: a friction wheel, fixedly connected to a cylindrical rod; a friction plate, used to cooperate with the friction wheel, and a positioning rod is installed on the friction plate; a support plate, fixedly installed on a fixed chamber, and the positioning rod is slidably connected to the support plate; a third spring, one end of which is fixedly installed on the friction plate, and the other end is fixedly connected to the support plate; and a protective ring, installed on the fixed chamber, and a cover plate is detachably installed on the protective ring, and a through hole is provided on the cover plate.

[0014] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0015] 1. When the straps (first strap / second strap) are released, the rotation of the positioning shaft synchronously tightens the coil spring, storing elastic potential energy. Once the hook is unloaded (such as after unloading), the coil spring immediately releases its energy, automatically driving the positioning shaft to rotate, achieving fully automatic and rapid retraction of the straps.

[0016] 2. When the coil spring is released, it drives the friction wheel fixed to the cylindrical rod to rotate. The friction wheel and the friction plate are in close contact, generating controllable sliding friction, which avoids the risk of injury or damage to property caused by the instantaneous high-speed rebound of the strap, and significantly improves operational safety.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0020] Figure 2 This is a partial schematic diagram according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the ratchet connection according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the first locking part according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the second locking part according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram showing the disassembled cover plate according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic cross-sectional view of a coil spring according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic cross-sectional view of the fixed compartment according to an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the friction plate connection according to an embodiment of the present invention.

[0028] In the diagram: 1. Fixing component, 11. First positioning plate, 12. Rotating shaft, 13. First strap, 2. Swinging component, 21. Second positioning plate, 3. Positioning shaft, 31. Ratchet, 32. Second strap, 4. First locking part, 41. First sliding plate, 42. First ratchet plate, 43. First extension plate, 44. First spring, 5. Second locking part, 51. Second sliding plate, 52. Second ratchet plate, 53. Second extension plate, 54. Operating plate, 55. Second spring, 6. Automatic winding mechanism, 61. Fixed compartment, 62. Coil spring, 63. Cylindrical rod, 7. Damping mechanism, 71. Friction wheel, 72. Friction plate, 73. Positioning rod, 74. Support plate, 75. Third spring, 76. Protective ring, 77. Cover plate. Detailed Implementation

[0029] like Figures 1 to 9 As shown, an automatic belt tensioner includes a fixing component 1, a swing component 2, a positioning shaft 3, a first locking part 4, a second locking part 5, an automatic winding mechanism 6, and a damping mechanism 7.

[0030] Furthermore, the fixing member 1 is rotatably connected to the positioning shaft 3;

[0031] The fixing member 1 is provided with a first guide groove, and a first positioning plate 11 is fixedly provided on the fixing member 1. The first positioning plate 11 is provided with a first connecting groove.

[0032] A rotating shaft 12 is rotatably mounted on the fixing member 1. A first strap 13 is provided on the rotating shaft 12. The first strap 13 is wrapped around the rotating shaft 12. A first hook is fixedly provided on the first strap 13.

[0033] The swing element 2 is rotatably connected to the positioning shaft 3;

[0034] The swing member 2 is provided with a second guide groove, and a second positioning plate 21 is fixedly provided on the swing member 2. The second positioning plate 21 is provided with a second connecting groove.

[0035] A ratchet 31 is fixedly installed on the positioning shaft 3;

[0036] The positioning shaft 3 has a through groove, and a second strap 32 is provided in the through groove. The second strap 32 is wrapped around the positioning shaft 3, and a second hook is fixedly provided on the second strap 32.

[0037] Furthermore, the first locking part 4 is provided on the fixing member 1 for engaging with the ratchet 31, including:

[0038] The first slide plate 41 is slidably disposed in the first guide groove. One end of the slide plate 41 is fixedly provided with a first ratchet plate 42 that cooperates with the ratchet 31, and the other end is fixedly provided with a first extension plate 43. The first extension plate 43 is slidably disposed in the first connecting groove. The first slide plate 41 is provided with a buckle groove.

[0039] The first spring 44 is sleeved on the first extension plate 43, with one end fixedly connected to the first positioning plate 11 and the other end in contact with the first sliding plate 41.

[0040] By controlling the first slide plate 41 to drive the first ratchet plate 42 so that it is no longer in contact with the ratchet teeth on the ratchet wheel 31, the first spring 44 can provide a reset force for the first slide plate 41, so that the first slide plate 41 can be reset when not operated, thereby driving the first ratchet plate 42 to contact the ratchet teeth on the ratchet wheel 31 (this is the working principle of the prior art ratchet wheel 31 tensioner, and since no improvement has been made to this point, it will not be described in detail).

[0041] Furthermore, the second locking part 5 is provided on the swing member 2 for engaging with the ratchet 31, including:

[0042] The second slide plate 51 is slidably disposed in the second guide groove. One end of the slide plate 51 is fixedly provided with a second ratchet plate 52 that cooperates with the ratchet 31, and the other end is fixedly provided with a second extension plate 53. An operation plate 54 is also fixedly provided on the second slide plate 51.

[0043] The second spring 55 is sleeved on the second extension plate 53, with one end fixedly connected to the second positioning plate 21 and the other end in contact with the second sliding plate 51.

[0044] The second slide plate 51 is driven by the control panel 54, which in turn drives the second ratchet plate 52 to disengage from the ratchet teeth on the ratchet wheel 31. The second spring 55 provides a reset force for the second slide plate 51, allowing it to reset when not operated, and then drives the second ratchet plate 52 to contact the ratchet teeth on the ratchet wheel 31 (this is the working principle of the existing ratchet wheel 31 tensioner, and since no improvements have been made here, it will not be described in detail).

[0045] Furthermore, the automatic winding mechanism 6 is located on one side of the fixing member 1 and is used to drive the positioning shaft 3 to automatically reset, including:

[0046] The fixed compartment 61 is fixedly connected to the fastener 1 via a support block;

[0047] A coil spring 62 is located inside a fixed chamber 61. Its fixed end is fixedly connected to the inner wall of the fixed chamber 61, and a cylindrical rod 63 is fixedly installed on its movable end. The cylindrical rod 63 passes through the fixed chamber 61 and is fixedly connected to the positioning shaft 3. The installation direction of the coil spring 62 follows the rotation direction of the positioning shaft 3. Specifically, when the second strap 32 is released, the coil spring 62 performs a coiling motion.

[0048] When the tensioner releases the strap during operation, it drives the positioning shaft 3 to rotate. At this time, the coil spring 62 performs a winding motion. After the first hook and the second hook on the first strap 13 and the second strap 32 are respectively hooked in the appropriate positions, the strap is no longer pulled. The coil spring 62 is not under force, and the strap is driven to retract and tighten. After the strap stops retracting, the strap can be tightened again by the swing member 2. Because the strap is in a taut and taut state at this time, the coil spring 62 remains in a pre-tension state to store energy for automatic recovery.

[0049] Furthermore, the damping mechanism 7 is used to provide damping for the automatic winding mechanism 6, and includes:

[0050] Friction wheel 71 is fixedly connected to cylindrical rod 63;

[0051] Friction plate 72 is used to cooperate with friction wheel 71, and a positioning rod 73 is installed on friction plate 72;

[0052] The support plate 74 is fixedly installed on the fixed chamber 61, and the positioning rod 73 is slidably connected to the support plate 74. The positioning rod 73 and the support plate 74 are configured to limit the movement of the friction plate 72.

[0053] The third spring 75 has one end fixedly mounted on the friction plate 72 and the other end fixedly connected to the support plate 74. The third spring 75 ensures that the friction plate 72 and the friction wheel 71 remain in contact.

[0054] A protective ring 76 is installed on the fixed chamber 61. A cover plate 77 is detachably installed on the protective ring 76, and a through hole is provided on the cover plate 77.

[0055] The protective ring 76 forms an accommodating space with the cover plate 77 and the fixed chamber 61, and the friction wheel 71 and the friction plate 72 are both located in this space;

[0056] The through-hole design prevents a vacuum from forming in the aforementioned containment space;

[0057] The protective ring 76 and the cover plate 77 are detachably connected together by threads.

[0058] When the cylindrical rod 63 rotates, frictional damping force is formed through the mutual contact between the friction wheel 71 and the friction plate 72, which avoids excessive force when the coil spring 62 is released, which would cause the strap to move too fast, making the retrieval safer.

[0059] An automatic belt tensioner works on the following principle:

[0060] When the second strap 32 is retrieved:

[0061] When the second strap 32 is released, it drives the positioning shaft 3 to rotate. At this time, the coil spring 62 is wound up. When it is retracted, the coil spring 62 is no longer under force (the strap has been unhooked). The coil spring 62 begins to release and drives the cylindrical rod 63 to rotate, which in turn drives the positioning shaft 3 to rotate, so that the strap is retracted.

Claims

1. An automatic belt tensioner, characterized in that: It includes a fixing component, a swing component, and a positioning shaft. The fixing component is rotatably connected to the positioning shaft, and the swing component is rotatably connected to the positioning shaft. A ratchet is fixedly mounted on the positioning shaft. The fixing component is provided with a first locking part that cooperates with the ratchet, and the swing component is provided with a second locking part that cooperates with the ratchet. Also includes: An automatic winding mechanism is located on one side of the fixed component and is used to drive the positioning shaft to automatically reset. A damping mechanism provides damping for the automatic winding mechanism.

2. The automatic belt tensioner according to claim 1, characterized in that: A rotating shaft is rotatably mounted on the fixing member, and a first strap is provided on the rotating shaft.

3. The automatic belt tensioner according to claim 1, characterized in that: A through groove is provided on the positioning shaft, and a second strap is provided in the through groove.

4. The automatic belt tensioner according to claim 1, characterized in that: The fastener has a first guide groove, and a first positioning plate is fixedly mounted on the fastener. The first positioning plate has a first connecting groove. The swing component has a second guide groove, and a second positioning plate is fixedly provided on the swing component. The second positioning plate has a second connecting groove.

5. An automatic belt tensioner according to claim 4, characterized in that: The first locking part includes: The first slide plate is slidably disposed in the first guide groove. One end of the slide plate is fixedly provided with a first ratchet plate that cooperates with a ratchet, and the other end is fixedly provided with a first extension plate. The first extension plate is slidably disposed in the first connecting groove. The first slide plate is provided with a buckle groove. The first spring is sleeved on the first extension plate, with one end fixedly connected to the first positioning plate and the other end in contact with the first sliding plate; The second locking part includes: The second slide plate is slidably disposed in the second guide groove. One end of the slide plate is fixedly provided with a second ratchet plate that cooperates with the ratchet, and the other end is fixedly provided with a second extension plate. An operating plate is also fixedly provided on the second slide plate. The second spring is sleeved on the second extension plate, with one end fixedly connected to the second positioning plate and the other end in contact with the second sliding plate.

6. An automatic belt tensioner according to claim 5, characterized in that: The automatic winding mechanism includes: The fixed compartment is securely connected to the fixing component via a support block; A coil spring is installed inside a fixed chamber. Its fixed end is fixedly connected to the inner wall of the fixed chamber, while a cylindrical rod is fixedly installed on its movable end. The cylindrical rod passes through the fixed chamber and is fixedly connected to the positioning shaft.

7. An automatic belt tensioner according to claim 6, characterized in that: The damping mechanism includes: The friction wheel is fixedly connected to the cylindrical rod; A friction plate, used to cooperate with a friction wheel, and a positioning rod is mounted on the friction plate; A support plate is fixedly installed on the fixed compartment, and the positioning rod is slidably connected to the support plate; The third spring has one end fixedly mounted on the friction plate and the other end fixedly connected to the support plate; A protective ring is installed on the fixed compartment, and a cover plate is detachably installed on the protective ring. The cover plate has a through hole.

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