ROTATION MECHANISM AND STRAP BINDING DEVICE

Abstract

ROTATION MECHANISM AND STRAP CLAMPING DEVICE The present invention relates to a rotation mechanism and a strap clamping device. The rotation mechanism comprises a pivot shaft (1) and a ratchet wheel. The pivot shaft (1) is used to connect the upper body of the clamping device to the lower body of the clamping device. The upper body of said clamping device is provided with a first axle hole on its two lateral plates, the lower body of said clamping device is provided with a second axle hole on its two lateral plates, and the ratchet wheel is provided with a third axle hole. The pivot shaft (1) is provided at each end with a limiting element passing through its cross-section and bearing against the ratchet wheel, and the pivot shaft (1) rotates in synchronization with the ratchet wheel. Figure to be published with the abstract: Figure 5

Description

Title of the invention: ROTATIONAL MECHANISM AND STRAP CLAMPING DEVICE technical field

[0001] The present invention relates to the technical field of clamping devices, and in particular to a rotation mechanism and a strap clamping device. PRIOR TECHNOLOGY

[0002] During the transport or storage of goods, it is necessary to secure them to prevent them from accidentally falling and causing losses and safety hazards. Due to its small size and light weight, the tie-down strap is a commonly used tool for securing goods. One end of the tie-down strap is connected to a clamping device, and the main body of the clamping device consists of a fastening element, a pulling element, a ratchet wheel, and a ratchet shaft, the fastening element, the pulling element, and the ratchet wheel being respectively fitted to the outside of the ratchet shaft.

[0003] During use, the other end of the binding strap is wrapped around the ratchet shaft after the goods have been bound, and the clamping device is locked by rotating the pull element so that the fastening element engages with the ratchet teeth, thus tightening and securing the binding strap and securing the goods. When the clamping device is loosened, the binding strap can be released to free the goods.

[0004] Document CN201110232540.9 discloses a typical ratchet wheel-type tie-back strap tensioner comprising a fastening element, a pulling element, a ratchet wheel, and a ratchet shaft, the fastening element, pulling element, and ratchet wheel being respectively fitted to the outside of the ratchet shaft. When using this tensioner, the ratchet shaft is subjected to increased resistance to rotation due to the simultaneous forces of the fastening element, the pulling element, and the ratchet, and the tie-back straps cannot be smoothly tensioned and wound. The ability of the tie-back straps within the clamping device to smoothly tension and wound affects the efficiency of securing and releasing the goods. DISCLOSURE OF THE INVENTION

[0005] On this point, the present invention aims to provide a rotation mechanism which allows a binding strap to be gently tensioned and wound around a ratchet shaft.

[0006] In order to achieve the aforementioned objective, the present invention proposes the following solution:

[0007] - a rotation mechanism, comprising a pivot shaft and a ratchet wheel, said pivot shaft is used to connect an upper body of a clamping device to a lower body of the clamping device;

[0008] - the upper body of the clamping device is provided with a first axle hole on its two side plates, the lower body of said clamping device is provided with a second axle hole on its two side plates and the ratchet wheel is provided with a third axle hole; the first axle hole is arranged on the outside or inside side of the second axle hole, respectively, and the inside diameters of the first axle hole and the second axle hole are identical and larger than that of the third axle hole;

[0009] - the pivot shaft passes through the first shaft hole, the second shaft hole and the third axle hole, the pivot shaft is provided at each end with a limiting element passing through its cross-section and bearing against the ratchet wheel to limit the upper body of the clamping device, the lower body of the clamping device and said ratchet wheel, and the pivot shaft rotates in synchronization with the ratchet wheel under the effect of a force.

[0010] Preferably, a side wall of the first axis hole and a side wall of the second axis hole are removably connected to each other, and the first axis hole and the second axis hole are subjected to relative rotation under the effect of a force.

[0011] Moreover preferably, the upper body of the clamping device is provided with a concave part or a projection along the peripheral circumference of the first axis hole, and the lower body of the clamping device is provided, along the peripheral circumference of the second axis hole, with a projection or a concave part corresponding to the concave part or projection on the peripheral circumference of the first axis hole, the projection being embedded in said concave part.

[0012] Preferably, the ratchet wheel is provided with several teeth.

[0013] Preferably, the pivot shaft symmetrically comprises a first half-shaft and a second half-shaft, the ratchet wheel is provided respectively with a first hole and a second hole to allow passage of the first half-shaft and the second half-shaft.

[0014] The maximum distance between the first hole and the second hole is less than the inner diameters of the first axis hole and the second axis hole.

[0015] Another objective of the present invention is to provide a binding strap clamping device which allows a binding strap to be gently tensioned and wound around a ratchet shaft.

[0016] In order to achieve the aforementioned objective, the present invention proposes the following solution:

[0017] - a strap fastening device, comprising a rotation mechanism such as described above,

[0018] - the upper body of the clamping device comprises two first plates lateral, one end of the first side plate being connected by a first handle and the other end being provided with a first axle hole;

[0019] - the first side plate is provided with a first sliding groove in which slides a first sliding plate, and the first sliding plate is provided with a first portion of ratcheting which extends from the first sliding groove;

[0020] - the upper body of said clamping device is provided with a first element elastic connected to the first sliding plate, and the first ratchet portion is engaged with play between the ratchet wheel teeth under the effect of a force exerted by the first elastic element;

[0021] - the lower body of the clamping device comprises two second plates lateral, one end of the second side plate being connected by a second handle and the other end being provided with a second axle hole;

[0022] - the second side plate is provided with a second sliding groove in which slides a second sliding plate, and the second sliding plate is provided with a second ratchet portion which extends from the second sliding groove;

[0023] - the lower body of said clamping device is provided with a second element elastic connected to the second sliding plate, and the second ratchet portion is engaged with play between the teeth of the ratchet wheel under the effect of a force exerted by the second elastic element.

[0024] Preferably, the second axle hole is arranged on the inner side of the first axle hole, and the second snap-in portion is provided with a limiting groove to limit the first side plate.

[0025] Preferably, at least one of the first side plates is provided with a torsion spring, and a pin of the torsion spring is connected to the first sliding plate.

[0026] Preferably, a base plate is connected between the two second side plates, the base plate is connected to a fixing portion to fix one end of the second elastic element; the second sliding plate is provided with a connecting rod, the second elastic element is fitted outside the connecting rod, and the fixing portion is provided with a through hole to allow the connecting rod to pass through.

[0027] In addition, preferably, a reinforcing rib is connected between the first two side plates, and the first sliding plate is provided with a handle.

[0028] The technical solutions of the present invention make it possible to obtain the following effects: following nefices:

[0029] 1) Because the inner diameter of the third axle hole is less than Due to the internal diameters of the first and second axle holes, a clearance exists between the pivot shaft and the internal walls of the first and second axle holes. This overhanging design allows the pivot shaft to avoid being subjected to forces exerted by the first and second axle holes. Furthermore, the ratchet wheel is kept in synchronous rotation with the pivot shaft, so that the pivot shaft, even when rotating, is not subjected to the force of the ratchet wheel. The solutions of the present invention make the rotation of the pivot shaft freer and the process of tensioning and winding the binding strap smoother, so that the goods can be secured and untied more easily.

[0030] 2) The first axle hole and the second axle hole form an integrated structure removable by means of the inset between side walls, which allows coaxiality to be maintained at all times during the rotation of the upper body of the clamping device and the lower body of the clamping device. BRIEF DESCRIPTION OF THE FIGURES

[0031] In order to illustrate more clearly the technical solutions in the embodiments of the present invention, the figures in the embodiments will be briefly described below, and it will be evident that the figures in the following description are only embodiments of the present invention, and that for a person skilled in the art, other figures can be obtained without creative work on the basis of the figures provided.

[0032] [Fig.1] shows an exploded view of the strap binding clamping device;

[0033] [Fig.2] shows a schematic three-dimensional view I of the clamping device at binding strap;

[0034] [Fig.3] shows a side view of the strap fastening device in [Fig.2]:

[0035] [Fig.4] shows a schematic three-dimensional view II of the strap binding clamping device;

[0036] [Fig.5] shows a schematic three-dimensional view III of the strap binding clamping device;

[0037] [Fig.6] shows a schematic three-dimensional view of the upper body of the clamping device;

[0038] [Fig.7] shows a three-dimensional diagram of the lower body of the clamping device; and

[0039] [Fig.8] shows a three-dimensional diagram of a second sliding plate.

[0040] In the figures, the reference numerals are as follows: 1- Pivot shaft; 2- First shaft hole; 3- Second shaft hole; 4- Ratchet wheel; 5- Third shaft hole; 6- Concave part; 7- Projection; 8- Teeth; 9- First half-shaft; 10- Second half-shaft; 11- Upper body of the clamping device; 12- Lower body of the clamping device; 13- First handle; 14- First side plate; 15- Second side plate; 16- Second handle; 17- First sliding plate; 18- First ratcheting portion; 19- First elastic element; 20- Second sliding plate; 21- Second sliding groove; 22- Second ratcheting portion; 23- Second elastic element; 24- Limiting groove; 25- Base plate; 26- Fixing portion; 27- Connecting rod; 28- Through hole; 29- Reinforcing rib; 30- Pull handle; 31- First sliding groove; 32- Limiting element. DETAILED DESCRIPTION OF THE PROCESS OF IMPLEMENTATION

[0041] In order to clarify the objective, the technical solutions, and the beneficial effects of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described in the following description with reference to the figures of the embodiments of the present invention. It is evident that the embodiments described are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work must be included within the scope of the present invention. Implementation method 1

[0042] As shown in Figures 1 to 7, the present embodiment provides a rotation mechanism comprising a pivot shaft 1 and a ratchet wheel 4, said pivot shaft 1 being used to connect an upper body of a clamping device to a lower body of the clamping device.

[0043] The upper body of the clamping device is provided with a first axis hole 2 on its two side plates, the lower body of the clamping device is provided with a second axis hole 3 on its two side plates and the ratchet wheel 4 is provided with a third axis hole 5; the first axis hole 2 is arranged on the outside or inside side of the second axis hole 3, respectively, and the inside diameters of the first axis hole 2 and the second axis hole 3 are identical and greater than that of the third axis hole 5.

[0044] The pivot shaft passes through the first axis hole 2, the second axis hole 3, and the third axis hole 5. The pivot shaft 1 is provided at each end with a limiting element 32 passing through its cross-section and bearing against the ratchet wheel 4 to limit the upper body of the clamping device, the lower body of the clamping device, and the ratchet wheel 4. The pivot shaft 1 rotates synchronously. with said ratchet wheel 4 under the effect of a force.

[0045] Because the inner diameter of the third axis hole 5 is smaller than the inner diameters of the first axis hole 2 and the second axis hole 3, there is clearance between the pivot shaft 1 and the inner walls of the first axis hole 2 and the second axis hole 3. This overhanging design prevents the pivot shaft 1 from being subjected to the forces exerted by the first axis hole 2 and the second axis hole 3. Furthermore, the ratchet wheel is kept in synchronous rotation with the pivot shaft, so that the pivot shaft, even when rotating, is not subjected to the force of the ratchet wheel. The configuration of this embodiment makes the rotation of the pivot shaft freer and the tensioning and winding process of the strap smoother, so that the goods can be attached and detached more easily.

[0046] In a preferred solution, a side wall of the first hole with axis 2 and a side wall of the second hole with axis 3 are removably connected to each other, and the first hole with axis 2 and the second hole with axis 3 are subjected to relative rotation under the effect of a force. For illustrative purposes and with reference to Figures 6-7, the upper body of the clamping device is provided with a concave part 6 or a projection 7 along the peripheral circumference of the first axis hole 2, the lower body of the clamping device is provided, along the peripheral circumference of the second axis hole 3, with a projection 7 or a concave part 6 corresponding to the concave part or projection at the level of the first axis hole, the projection 7 is embedded in the concave part 6 and can rotate clockwise or counterclockwise inside the concave part 6.The "integrated" configuration of the first axis 2 hole and the second axis 3 hole keeps the first axis 2 hole and the second axis 3 hole always coaxial.

[0047] In a preferred solution, to facilitate the mounting of the ratchet wheel 4, said ratchet wheel 4 is provided with several teeth 8.

[0048] In a more preferred solution and with reference to [Fig. 1], the pivot shaft 1 symmetrically comprises a first half-shaft 9 and a second half-shaft 10. The ratchet wheel 4 is provided with a first hole and a second hole respectively to allow passage of the first half-shaft 9 and the second half-shaft 10. This configuration prevents the pivot shaft 1 from rotating relative to the third hole of axis 5, ensures synchronized rotation of the pivot shaft 1 and the ratchet wheel 4, and prevents the rotating pivot shaft 1 from being subjected to a force from the ratchet wheel 4. The maximum distance between the first hole and the second hole is less than the inner diameters of the first hole of axis 2 and the second hole of axis 3 to allow the pivot shaft 1 to be suspended relative to the first hole of axis 2 and the second hole of axis 3. Implementation method 2

[0049] As shown in Figures 1 to 8, the present embodiment provides a binding strap clamping device which includes the rotation mechanism in embodiment 1.

[0050] With reference to [Fig. 6], the upper body of the clamping device 11 comprises two first side plates 14, one end of the first side plate 14 being connected by a first handle 13 and the other end being provided with a first axle hole 2. The first side plate 14 is provided with a first sliding groove 31 in which the first sliding plate 17 slides, and the first sliding plate 17 is provided with a first ratcheting portion 18 which extends from the first sliding groove 31. The upper body of the clamping device 11 is provided with a first elastic element 19 connected to the first sliding plate 17, and the first ratcheting portion 18 is engaged in a gap between the teeth of the ratchet wheel 4 under the effect of the force exerted by the first elastic element 19.

[0051] With reference to [Fig. 7], the lower body of the clamping device 12 comprises two second side plates 15, one end of the second side plate 15 being connected by a second handle 16 and the other end being provided with a second axle hole 3. The second side plate 15 is provided with a second sliding groove 21 in which the second sliding plate 20 slides, and the second sliding plate 20 is provided with a second ratcheting portion 22 extending from the second sliding groove 21. The lower body of the clamping device 12 is provided with a second elastic element 23 connected to the second sliding plate 20, and the second ratcheting portion 22 is engaged in a gap between the ratcheting wheel teeth 4 under the effect of the force exerted by the second elastic element 23.

[0052] In a preferred solution, the second axle hole 3 is arranged on the inner side of the first axle hole 2, and the second ratcheting portion 22 is provided with a limiting groove 24 to limit the first side plate. In the present embodiment, the first sliding plate 17 and the second sliding plate 20, in addition to playing an engagement role for the ratchet wheel 4, also play a reinforcing and shaping role for the first two side plates 14 and the second two side plates 15 respectively, thus preventing the first side plate 14 and the second side plate 15 from deforming and undergoing other deformations, which allows the first side plate 14 and the second side plate 15 to always be in close contact.As shown in Figures 1 and 8, the first side plate 14 at the periphery of the first axis hole 2 is always limited in its rotation inside the limiting groove 24, thus preventing separation between the first axis hole 2 and the second axis hole 3.

[0053] By way of illustration, the first elastic element 19 may include at least one torsion spring disposed on one of the first side plates 14, and a pin of the torsion spring is connected to the first sliding plate. By way of illustration, a base plate 25 is connected between the two second side plates 15, said base plate 25 being connected to a fixing portion 26 for fixing one end of the second elastic element 23; the second sliding plate 20 is provided with a connecting rod 27 connected to the second elastic element in a direction away from the ratchet wheel 4, the second elastic element 23 being fitted to the outside of the connecting rod 27, the fixing portion 26 being provided with a through hole 28 for passing the connecting rod 27, in which the second elastic element 23 is a compression spring.When the second sliding plate 20 is pulled away from the ratchet wheel 4, the connecting rod 27 passes through the through hole 28 in the fastening portion 26, and the first side plate 14 is also clear of the limitation of the limiting groove 24, making it possible to apply a force away from the second side plate 15 on the first side plate 14 to separate the first side plate 14 from the second side plate 15.

[0054] In a preferred solution, a reinforcing rib 29 is also connected between the first two side plates 14 to reinforce and shape the first side plates 14, and the first sliding plate 17 is provided with a handle 30.

[0055] To lock the binding strap using the binding strap clamping device, the first handle of the upper body of the clamping device is held, and the upper body of the clamping device is continuously pressed in the direction of the lower body of the clamping device, so that the first ratchet portion is continuously pushed the ratchet wheel to rotate, and the ratchet wheel drives the pivot shaft to wind the binding strap until the binding strap is firmly wound, so as to secure the goods.When the goods need to be detached, the upper body of the clamping device is pressed in the opposite direction, the first ratchet portion is detached from the ratchet wheel with the ratchet wheel teeth, the ratchet wheel is subjected to a force and the force is transferred to the second ratchet portion, the second ratchet portion is subjected to a force and compresses the second elastic element and is detached from the ratchet wheel, and at this moment the ratchet wheel is in a state of free rotation, and the binding strap wound on it is released.

[0056] The embodiments described above are merely illustrative descriptions of the present invention and are not intended to limit the scope of the present invention. Any variations and improvements made by those skilled in the art to the technical solutions of the present invention must be included within the scope of the present invention.

Claims

Demands

1. A rotation mechanism, characterized in that it comprises a pivot shaft (1) and a ratchet wheel (4), said pivot shaft (1) being used to connect an upper body of a clamping device (11) to a lower body of the clamping device (12); - the upper body of the clamping device (11) is provided with a first axle hole (2) on its two side plates, the lower body of the clamping device (12) is provided with a second axle hole (3) on its two side plates and the ratchet wheel (4) is provided with a third axle hole (5); the first axle hole (2) is arranged on the outside or inside side of the second axle hole (3), respectively, and the inside diameters of the first axle hole (2) and the second axle hole (3) are identical and larger than that of the third axle hole (5);- the pivot shaft (1) passes through the first axle hole (2), the second axle hole (3) and the third axle hole (5), the pivot shaft (1) being provided at each end with a limiting element (32) passing through its cross-section and bearing against the ratchet wheel (4) to limit the upper body of the clamping device (11), the lower body of the clamping device (12) and the ratchet wheel (4), and the pivot shaft (1) rotating in synchronization with the ratchet wheel (4) under the effect of a force.;

2. Rotation mechanism according to claim 1, characterized in that a side wall of the first axis hole (2) and a side wall of the second axis hole (3) are removably connected to each other, and that the first axis hole (2) and the second axis hole (3) are subjected to relative rotation under the effect of a force.

3. Rotation mechanism according to claim 2, characterized in that the upper body of the clamping device (11) is provided with a concave part (6) or a projection (7) along the peripheral circumference of the first axis hole (2), and that the lower body of the clamping device (12) is provided, along the peripheral circumference of the second axis hole (3), with a projection (7) or a concave part (6) corresponding to the concave part (6) or the projection (7) on the peripheral circumference of the first axis hole (2), the projection (7) being embedded in the concave part (6).

4. Rotation mechanism according to claim 1, characterized in that the ratchet wheel (4) is provided with several teeth (8).

5. A rotation mechanism according to any one of claims 1 to 4, characterized in that the pivot shaft (1) symmetrically comprises a first half-shaft (9) and a second half-shaft (10), and the ratchet wheel (4) is provided respectively with a first hole and a second hole to allow passage of the first half-shaft (9) and the second half-shaft (10); - the maximum distance between the first hole and the second hole is less than the internal diameters of the first shaft hole (2) and the second shaft hole (3).

6. Strap fastening device, characterized in that it comprises a rotation mechanism according to any one of claims 1 to 5, - the upper body of the fastening device (11) comprises two first side plates (14), one end of the first side plate (14) being connected by a first handle (13) and the other end being provided with a first axle hole (2); - the first side plate (14) is provided with a first sliding groove (31) in which a first sliding plate (17) slides, and the first sliding plate (17) is provided with a first ratchet portion (18) which extends from the first sliding groove (31);- the upper body of the clamping device (11) is provided with a first elastic element (19) connected to the first sliding plate (17), and the first ratchet portion (18) is engaged with clearance between the teeth (8) of the ratchet wheel (4) under the effect of a force exerted by the first elastic element (19); - the lower body of the clamping device (12) comprises two second side plates (15), one end of the second side plate (15) being connected by a second handle (16) and the other end being provided with a second axle hole (3); - the second side plate (15) is provided with a second sliding groove (21) in which a second sliding plate (20) slides, and the second sliding plate (20) is provided with a second ratchet portion (22) which extends from the second sliding groove (21);- the lower body of the clamping device (12) is provided with a second elastic element (23) connected to the second sliding plate (20), and the second ratchet portion (22) is engaged with play; between the teeth (8) of the ratchet wheel (4) under the effect of a force exerted by the second elastic element (23).

7. Strap binding device according to claim 6, characterized in that the second axle hole (3) is arranged on the inner side of the first axle hole (2), and that the second snap-on portion (22) is provided with a limiting groove (24) to limit the first side plate (14).

8. Strap binding device according to claim 6 characterized in that at least one of the first side plates (14) is provided with a torsion spring, and a pin of the torsion spring is connected to the first sliding plate (17).

9. Strap fastening device according to claim 6, characterized in that a base plate (25) is connected between the two second side plates (15), the base plate (25) being connected to a fixing portion (26) for fixing one end of the second elastic element (23); the second sliding plate (20) is provided with a connecting rod (27), the second elastic element (23) being fitted outside the connecting rod (27), and the fixing portion (26) being provided with a through hole (28) to allow the connecting rod (27) to pass through.

10. Strap fastening device according to claim 6, characterized in that a reinforcing rib (29) is connected between the first two side plates (14), and the first sliding plate (17) is provided with a handle (30).