Ratchet strap tensioner

Abstract

The utility model relates to the technical field of tensioner, especially a ratchet strap tensioner, which comprises a fixing part and a swing part, the swing part is rotatably connected with the fixing part through a positioning shaft, at least two ratchets are fixed on the two ends of the positioning shaft respectively and are arranged between the fixing part and the swing part, a first locking part is arranged on the fixing part, a second locking part is arranged on the swing part, and at least two locking mechanisms are arranged. The utility model has the advantages that the locking action is completed by the locking part (ratchet plate + spring), a first basic locking is provided, the locking mechanism (first / second) is an independent, active and forced locking device, and the second safety guarantee is provided for the locking part, even if the spring of the locking part is fatigued or slightly fails (as long as the ratchet plate is not completely separated from the ratchet teeth), the locking mechanism can still forcibly maintain the locking position of the ratchet plate, the locking state is prevented from being accidentally damaged, and the safety margin of the overall system is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of tensioner technology, and in particular to a ratchet strap tensioner. Background Technology

[0002] In cargo transportation, warehousing and securing, ratchet strap tensioners are widely used due to their ease of operation and strong locking force. Traditional ratchet tensioners typically use a spring-return pawl as a one-way locking mechanism: when the operating handle is swung, the pawl engages with the ratchet teeth under the action of the spring to achieve one-way locking; when release is required, the pawl must be manually lifted to overcome the spring force.

[0003] However, as the ratchet tensioner is used for a longer period of time, the elastic element will approach or reach its fatigue limit. If the user fails to check it due to negligence, the elastic element may reduce the force applied to the pawl, making it impossible for the pawl to reach the position that fully restrains the ratchet (i.e., the ratchet is in a state where the restraint is released—on bumpy roads, the pawl is easily subjected to force and leaves the ratchet restraint). This can easily lead to loosening during transportation.

[0004] To address this issue, this utility model proposes a ratchet strap 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 a ratchet strap 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 the present invention provides a ratchet strap tensioner, comprising: a fixed member and a swing member, the swing member being rotatably connected to the fixed member via a positioning shaft; at least two ratchet wheels, respectively fixed at both ends of the positioning shaft and disposed between the fixed member and the swing member; a first locking part disposed on the fixed member; a second locking part disposed on the swing member; and at least two sets of locking mechanisms, one set mounted on the fixed member and the other set mounted on the swing member, for locking the first locking part and the second locking part, respectively.

[0008] Preferably, in any of the above embodiments, the fastener is provided with a rotating shaft, a first strap is mounted on the rotating shaft, and a first hook is fixedly mounted on the first strap; a first positioning plate is fixedly mounted on the fastener, and a first through groove is formed on the first positioning plate; a first guide groove is formed on the side wall of the fastener.

[0009] Preferably, the swing member is provided with a handle; a second positioning plate is fixedly provided on the swing member, and a second through groove is provided on the second positioning plate; a second guide groove and a square groove are provided on the side wall of the swing member.

[0010] Preferably, in any of the above embodiments, a second strap is installed on the positioning shaft, and a second hook is fixedly installed on the second strap.

[0011] Preferably, in any of the above embodiments, the first locking part includes: a first sliding plate, which is slidably disposed in a first guide groove, with a first ratchet plate fixedly disposed at one end to engage with the ratchet teeth on the ratchet wheel, and a first extension plate fixedly disposed at the other end to engage with the first through groove; the first sliding plate is provided with a locking groove and a recess; and a first spring, which 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.

[0012] Preferably, in any of the above embodiments, the second locking part includes: a second sliding plate, which is slidably disposed in the second guide groove, with a second ratchet plate fixedly disposed at one end to engage with the ratchet teeth on the ratchet wheel, and a second extension plate fixedly disposed at the other end to engage with the second through groove; an operating plate is also mounted on the second sliding plate; and a second spring, which 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.

[0013] Preferably, the two sets of locking mechanisms are divided into a first locking mechanism and a second locking mechanism.

[0014] Preferably, in any of the above embodiments, the first locking mechanism includes: a first connecting block, on which a first connecting groove is formed, and in which a first slot is formed; a first locking block, slidably disposed in the first connecting groove, having two sets of first hemispherical grooves formed thereon, and a first operating block fixedly disposed on the first locking block; a first steel ball, slidably disposed in the first slot for engaging with the first hemispherical groove; and a first return spring, one end of which is fixedly installed in the slot, and the other end of which is fixedly connected to the first steel ball.

[0015] Preferably, in any of the above embodiments, the second locking mechanism includes: a second connecting block, on which a second connecting groove is formed, and in which a second slot is formed; a second locking block, slidably disposed in the second connecting groove, having two sets of second hemispherical grooves formed thereon, and a second operating block fixedly disposed on the second locking block, the second locking block also having a sliding fit with the square groove; a second steel ball, slidably disposed in the second slot for fitting with the second hemispherical groove; and a second return spring, one end of which is fixedly installed in the slot, and the other end of which is fixedly connected to the second steel ball.

[0016] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0017] The locking action itself is completed by the locking part (ratchet + spring), providing the first basic locking. The locking mechanism (first / second) is an independent, active, and forced locking device, providing a second safety guarantee for the locking part. Even if the spring of the locking part is fatigued or slightly malfunctions (as long as the ratchet is not completely disengaged from the ratchet), the locking mechanism can still forcibly maintain the locking position of the ratchet, preventing the locking state from being accidentally destroyed, and greatly improving the safety margin of the overall system.

[0018] 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

[0019] 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:

[0020] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0021] Figure 2 This is a partial cross-sectional schematic diagram of the fastener according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the first locking part according to an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the connection of the swing component according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the second locking part according to an embodiment of the present utility model;

[0025] Figure 6 This is a schematic diagram of the first locking mechanism according to an embodiment of the present utility model;

[0026] Figure 7 This is a cross-sectional schematic diagram of the first connecting block according to an embodiment of the present utility model;

[0027] Figure 8 This is a schematic diagram of the second locking mechanism according to an embodiment of the present utility model;

[0028] Figure 9 This is a cross-sectional schematic diagram of the second connecting block according to an embodiment of the present utility model.

[0029] In the diagram: 1. Fixing component, 11. Rotating shaft, 12. First strap, 13. First positioning plate, 2. Swinging component, 21. Handle, 22. Second positioning plate, 3. Ratchet, 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. First locking mechanism, 61. First connecting block, 62. First locking block, 63. First operating block, 64. First steel ball, 65. First return spring, 7. Second locking mechanism, 71. Second connecting block, 72. Second locking block, 73. Second operating block, 74. Second steel ball, 75. Second return spring, 8. Positioning shaft, 81. Second strap. Detailed Implementation

[0030] like Figures 1 to 9 As shown, a ratchet strap tensioner includes a fixing member 1, a swing member 2, a ratchet 3, a first locking part 4, a second locking part 5, and a locking mechanism.

[0031] Furthermore, the swinging member 2 is rotatably connected to the fixed member 1 via the positioning shaft 8;

[0032] The fastener 1 is rotatably provided with a rotating shaft 11, a first strap 12 is installed on the rotating shaft 11, and a first hook is fixedly installed on the first strap;

[0033] A first positioning plate 13 is fixedly provided on the fastener 1, and a first through groove is provided on the first positioning plate 13;

[0034] A first guide groove is provided on the side wall of the fastener 1;

[0035] The swing member 2 is provided with a handle 21;

[0036] The swing member 2 is fixedly provided with a second positioning plate 22, and the second positioning plate 22 is provided with a second through groove.

[0037] The side wall of the swing member 2 is provided with a second guide groove and a square groove;

[0038] A second strap 81 is installed on the positioning shaft 8, and a second hook is fixedly installed on the second strap 81.

[0039] Furthermore, there are at least two ratchet wheels 3, which are respectively fixed on both ends of the positioning shaft 8 and positioned between the fixing member 1 and the swing member 2.

[0040] Furthermore, the first locking part 4 includes:

[0041] The first slide plate 41 is slidably disposed in the first guide groove. One end of the first slide plate 41 is fixedly provided with a first ratchet plate 42 that engages with the ratchet teeth on the ratchet 3, and the other end is fixedly provided with a first extension plate 43 that slidably engages with the first through groove. The first slide plate 41 is provided with a locking groove and a recess.

[0042] The first spring 44 is sleeved on the first extension plate 43, with one end fixedly connected to the first positioning plate 13 and the other end in contact with the first sliding plate 41.

[0043] Furthermore, the second locking part 5 includes:

[0044] 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 engages with the ratchet teeth on the ratchet 3, and the other end is fixedly provided with a second extension plate 53 that slidably engages with the second through groove. An operating plate 54 is also installed on the second slide plate 51. The operating plate 54 is perpendicular to the second slide plate 51.

[0045] The second spring 55 is sleeved on the second extension plate 53, with one end fixedly connected to the second positioning plate 22 and the other end in contact with the second sliding plate 51.

[0046] Furthermore, the locking mechanism is provided in at least two sets, namely a first locking mechanism 6 and a second locking mechanism 7, which are used to lock the first locking part 4 and the second locking part 5 respectively.

[0047] The first locking mechanism 6 includes:

[0048] A first connecting block 61 is provided with a first connecting groove and a first slot hole is provided in the first connecting groove. The first connecting block 61 is fixedly installed on the fastener 1.

[0049] The first locking block 62 is slidably disposed in the first connecting groove, and has two sets of first hemispherical grooves. The first operating block 63 is fixedly disposed on the first locking block 62.

[0050] The first steel ball 64 is slidably disposed in the first slot to fit the first hemispherical groove;

[0051] The first return spring 65 has one end fixedly installed in the slot, and the other end fixedly connected to the first steel ball 64.

[0052] The second locking mechanism 7 includes:

[0053] The second connecting block 71 has a second connecting groove and a second slot hole. The second connecting block 71 is fixedly installed on the swing member.

[0054] The second locking block 72 is slidably disposed in the second connecting groove, and has two sets of second hemispherical grooves. The second locking block 72 is fixedly provided with a second operating block 73, and the second locking block 72 is also in sliding cooperation with the square groove.

[0055] The second steel ball 74 is slidably disposed in the second slot to fit the second hemispherical groove;

[0056] The second return spring 75 has one end fixedly installed in the slot, and the other end fixedly connected to the second steel ball 74.

[0057] Both the first locking block 62 and the second locking block 72 are fixedly provided with limiting plates.

[0058] The first locking mechanism 6 serves to lock the first ratchet plate 42 in contact with the ratchet teeth on the ratchet wheel 3, and also to lock the first ratchet plate 42 in a non-contact state with the ratchet teeth on the ratchet wheel 3.

[0059] Similarly, the second locking mechanism 7 serves to lock the second ratchet plate 52 in contact with the ratchet teeth on the ratchet wheel 3, and also to lock the second ratchet plate 52 in a non-contact state with the ratchet teeth on the ratchet wheel 3.

[0060] A ratchet 3-belt tensioner, the working principle of which is as follows:

[0061] 1) The steps for the first locking part to lock or unlock the first locking part 4 are as follows:

[0062] By pulling the first operating block 63, the first locking block 62 is moved, causing the first locking block 62 to move under the constraint of the first connecting block 61. With the movement of the first locking block 62, the first hemispherical grooves corresponding to the first slot are misaligned, causing the first steel ball 64 to be forced to move into the first slot and simultaneously compressing the first return spring 65. With the movement of the first locking block 62, when the position of the first slot corresponds to the position of another set of first hemispherical grooves on the first locking block 62, the first return spring 65 is no longer under force, driving the first steel ball 64 to move into the first hemispherical groove at that location, locking the first locking block 62 in that position, so that the first locking block 62 no longer contacts the first slide plate 41. At this time, the first slide plate 41 can be adjusted. If the first ratchet plate 42 is not to contact the ratchet teeth on the ratchet wheel 3, simply adjust the first slide plate 41 until the locking groove on it is below the first locking block 62, and then press the first operating block 63 to insert the first locking block 62 into the locking groove.

[0063] 2) The steps for the second locking part to lock or unlock the second locking part 5 are as follows:

[0064] By pulling the second operating block 73, the second locking block 72 is moved, causing the second locking block 72 to move under the constraint of the second connecting block 71. With the movement of the second locking block 72, the second hemispherical grooves corresponding to the second slot are misaligned, causing the second steel ball 74 to be forced to move into the second slot and simultaneously compressing the second return spring 75. With the movement of the second locking block 72, when the position of the second slot corresponds to the position of another set of second hemispherical grooves on the second locking block 72, the second return spring 75 is no longer under force, driving the second steel ball 74 to move into the second hemispherical groove at that location, locking the second locking block 72 in that position, so that the second locking block 72 no longer contacts the operating plate 54 on the second slide plate 51. At this time, the second slide plate 51 can be adjusted. If the second ratchet plate 52 is not in contact with the ratchet teeth on the ratchet wheel 3, simply move the operating plate 54 on the second slide plate 51 from one side of the second locking block 72 to the other side, and then press the second operating block 73 to make the second locking block 72 and the operating plate 54 contact each other again.

Claims

1. A ratchet strap tensioner, characterized in that: include: A fixed component and a swinging component, wherein the swinging component is rotatably connected to the fixed component via a positioning shaft; At least two ratchet wheels are fixedly mounted on both ends of the positioning shaft and positioned between the fixed component and the swing component; The first locking part is provided on the fixing member; The second locking part is provided on the swing member; At least two sets of locking mechanisms, one set is installed on the fixed part and the other set is installed on the swinging part, which are used to lock the first locking part and the second locking part respectively.

2. The ratchet strap tensioner according to claim 1, characterized in that: The fastener is rotatably provided with a rotating shaft, a first strap is installed on the rotating shaft, and a first hook is fixedly installed on the first strap; A first positioning plate is fixedly provided on the fastener, and a first through groove is provided on the first positioning plate; A first guide groove is provided on the side wall of the fastener.

3. The ratchet strap tensioner according to claim 1, characterized in that: The swing component is provided with a handle; A second positioning plate is fixedly provided on the swing component, and a second through groove is provided on the second positioning plate; The side wall of the swinging component is provided with a second guide groove and a square groove.

4. The ratchet strap tensioner according to claim 1, characterized in that: A second strap is installed on the positioning shaft, and a second hook is fixedly installed on the second strap.

5. A ratchet strap tensioner according to claim 2, characterized in that: The first locking part includes: The first slide plate is slidably disposed in the first guide groove. One end of the first slide plate is fixedly provided with a first ratchet plate that engages with the ratchet teeth on the ratchet wheel, and the other end is fixedly provided with a first extension plate that slidably engages with the first through groove. The first slide plate is provided with a locking groove and a recess. 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.

6. A ratchet strap tensioner according to claim 3, characterized in that: 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 engages with the ratchet teeth on the ratchet wheel, and the other end is fixedly provided with a second extension plate that slidably engages with the second through groove. An operating plate is also installed 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.

7. A ratchet strap tensioner according to claim 3, characterized in that: The two sets of locking mechanisms are divided into a first locking mechanism and a second locking mechanism.

8. A ratchet strap tensioner according to claim 7, characterized in that: The first locking mechanism includes: A first connecting block, wherein a first connecting groove is formed on the first connecting block and a first slot hole is formed in the first connecting groove; The first locking block is slidably disposed in the first connecting groove, and has two sets of first hemispherical grooves. The first operating block is fixedly disposed on the first locking block. The first steel ball is slidably disposed in the first slot to fit the first hemispherical groove; The first return spring has one end fixedly installed in the slot, and the other end fixedly connected to the first steel ball.

9. A ratchet strap tensioner according to claim 7, characterized in that: The second locking mechanism includes: The second connecting block has a second connecting groove and a second slot hole inside the second connecting groove. The second locking block is slidably disposed in the second connecting groove, and has two sets of second hemispherical grooves. The second locking block is fixedly provided with a second operating block, and the second locking block is also in sliding cooperation with the square groove. The second steel ball is slidably disposed in the second slot to fit the second hemispherical groove; The second return spring has one end fixedly installed in the slot, and the other end fixedly connected to the second steel ball.

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