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: ROTATION MECHANISM AND TIGHTENING DEVICE WITH TYING STRAP Technical field

[0001] The present invention relates to the technical field of clamping devices, and in particular to a rotation mechanism and a tightening device with a binding strap. STATE OF THE ART

[0002] When transporting or storing goods, it is necessary to fix them to prevent them from accidentally falling and causing losses and safety hazards. Due to its small size and light weight, the binding strap is a commonly used tool for fixing goods. One end of the binding strap is connected to a tightening device, and the main body of the tightening device consists of a fixing member, a traction member, a ratchet wheel and a ratchet shaft, the fixing member, the traction member and the ratchet wheel being respectively fitted outside the ratchet shaft.

[0003] In use, the other end of the binding strap is wrapped around the ratchet shaft after binding the goods, and the tightening device is locked by rotating the pulling member so that the fastening member engages with the teeth of the ratchet, thereby tightening and fixing the binding strap, thereby realizing the fixing of the goods. When the tightening device is loosened, the binding strap can be released to release the goods.

[0004] Document CN201110232540.9 discloses a typical ratchet wheel type tying strap tensioner, comprising a fastening member, a traction member, a ratchet wheel and a ratchet shaft, the fastening member, the traction member and the ratchet wheel being respectively nested outside the ratchet shaft. When using this tensioner, the ratchet shaft is subjected to increased rotational resistance due to the simultaneous forces of the fastening member, the traction member and the ratchet, and the tying straps cannot be tensioned and wound smoothly. The ability of the tying straps located in the tightening device to tension and wind smoothly affects the efficiency of fastening and detaching the goods. DISCLOSURE OF THE INVENTION

[0005] In this respect, the object of the present invention is to provide a rotation mechanism which allows a binding strap to be smoothly tensioned and wound onto a ratchet shaft.

[0006] In order to achieve the above-mentioned 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 outer or inner side of the second axle hole, respectively, and the inner diameters of the first axle hole and the second axle hole are the same as and larger than that of the third axle hole;

[0009] - the pivot shaft passes through the first axle hole, the second axle hole and the third axle hole, the pivot shaft is provided at each end with a limiting member 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] More preferably, the upper body of the clamping device is provided with a concave portion 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 portion corresponding to the concave portion or the projection on the peripheral circumference of the first axis hole, the projection being embedded in said concave portion.

[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 the first half-shaft and the second half-shaft to pass through.

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

[0015] Another object of the present invention is to provide a binding strap tightening device which enables a binding strap to be smoothly tensioned and wound onto a ratchet shaft.

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

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

[0018] - the upper body of the clamping device comprises two first plates sides, 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 snap-fit ​​portion which extends from the first sliding groove;

[0020] - the upper body of said clamping device is provided with a first element elastic element connected to the first sliding plate, and the first ratchet portion is engaged with clearance 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 sides, 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 a second sliding plate slides, and the second sliding plate is provided with a second snap-in portion which extends from the second sliding groove;

[0023] - the lower body of said clamping device is provided with a second element elastic element 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 for limiting 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] More preferably, a base plate is connected between the two second side plates, the base plate is connected to a fixing portion for fixing one end of the second elastic member; the second sliding plate is provided with a connecting rod, the second elastic member is fitted outside the connecting rod, and the fixing portion is provided with a through hole for passing the connecting rod.

[0027] More preferably, a reinforcing rib is connected between the two first 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 bene- following benefits:

[0029] 1) Because the inner diameter of the third axle hole is smaller than the inner diameters of the first axle hole and the second axle hole, a clearance exists between the pivot shaft and the inner walls of the first and second axle holes, this overhanging design allows the pivot shaft not to be subjected to the forces exerted by the first and second axle holes. In addition, 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 reinforced and detached more easily.

[0030] 2) The first axle hole and the second axle hole form an integrated structure removable by means of the embedding between side walls, which allows to maintain coaxiality 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 obvious that the figures in the following description are only embodiments of the present invention, and that for those skilled in the art, other figures can be obtained without creative work based on the figures provided.

[0032] [Fig.l] shows an exploded view of the binding strap tightening device;

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

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

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

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

[0037] [Fig.6] shows a three-dimensional schematic 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 references are as follows: 1- Pivot shaft; 2- First axle hole; 3- Second axle hole; 4- Ratchet wheel; 5- Third axle 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 snap-in portion; 19- First elastic element; 20- Second sliding plate; 21- Second sliding groove; 22- Second snap-in 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 PRESENTATION OF THE IMPLEMENTATION METHOD

[0041] In order to clarify the purpose, technical solutions and beneficial effects of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be described clearly and completely in the following description with reference to the figures of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should be included within the scope of the present invention. Embodiment 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 for connecting 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 outer or inner side of the second axis hole 3, respectively, and the inner diameters of the first axis hole 2 and the second axis hole 3 are the same and larger than that of the third axis hole 5.

[0044] The pivot shaft passes through the first axle hole 2, the second axle hole 3 and the third axle hole 5, the pivot shaft 1 is provided at each end with a limiting member 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, and the pivot shaft 1 rotates in synchronization with said ratchet wheel 4 under the effect of a force.

[0045] Because the inner diameter of the third axle hole 5 is smaller than the inner diameters of the first axle hole 2 and the second axle hole 3, a clearance exists between the pivot shaft 1 and the inner walls of the first axle hole 2 and the second axle hole 3, and this overhanging design allows the pivot shaft 1 not to be subjected to the forces exerted by the first axle hole 2 and the second axle hole 3. Furthermore, the ratchet wheel is kept rotating synchronously 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 the present embodiment makes the rotation of the pivot shaft freer and the process of tensioning and winding the strap smoother, so that the goods can be fixed and detached more easily.

[0046] In a preferred solution, 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 the first axis hole 2 and the second axis hole 3 are subjected to relative rotation under the effect of a force. For illustration purposes and with reference to Figures 6-7, the upper body of the clamping device is provided with a concave portion 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 portion 6 corresponding to the concave portion or the projection at the first axis hole, the projection 7 is embedded in the concave portion 6 and can rotate clockwise or counterclockwise inside the concave portion 6.The "integrated" configuration of the first axis hole 2 and the second axis hole 3 keeps the first axis hole 2 and the second axis hole 3 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.l], the pivot shaft 1 symmetrically comprises a first half-shaft 9 and a second half-shaft 10, the ratchet wheel 4 is provided respectively with a first hole and a second hole to allow the first half-shaft 9 and the second half-shaft 10 to pass through. Such a configuration prevents the pivot shaft 1 from rotating relative to the third axis hole 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 axis hole 2 and the second axis hole 3 to allow the pivot shaft 1 to be suspended relative to the first axis hole 2 and the second axis hole 3. Embodiment 2

[0049] As shown in Figures 1-8, the present embodiment provides a binding strap tightening device that includes the rotation mechanism in Embodiment 1.

[0050] Referring 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 snap portion 18 which extends from the first sliding groove 31. The upper body of the clamping device 11 is provided with a first elastic member 19 connected to the first sliding plate 17, and the first snap portion 18 is engaged in a clearance between the ratchet wheel teeth 4 under the force exerted by the first elastic member 19.

[0051] Referring 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 snap-in portion 22 which extends from the second sliding groove 21. The lower body of the clamping device 12 is provided with a second elastic member 23 connected to the second sliding plate 20, and the second snap-in portion 22 is engaged in a clearance between the ratchet wheel teeth 4 under the force exerted by the second elastic member 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 snap-in portion 22 is provided with a limiting groove 24 for limiting the first side plate. In the present embodiment, the first sliding plate 17 and the second sliding plate 20, in addition to playing an engaging role for the ratchet wheel 4, also play a reinforcing and shaping role for the two first side plates 14 and the two second side plates 15 respectively, thereby preventing the first side plate 14 and the second side plate 15 from deforming and undergoing further deformations, which allows the first side plate 14 and the second side plate 15 to always be in close connection.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 within the limiting groove 24, thus avoiding separation between the first axis hole 2 and the second axis hole 3.

[0053] For illustration purposes, the first elastic member 19 may comprise 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. For illustration purposes, a base plate 25 is connected between the two second side plates 15, said base plate 25 is connected to a fixing portion 26 for fixing one end of the second elastic member 23; the second sliding plate 20 is provided with a connecting rod 27 connected to the second elastic member in a direction away from the ratchet wheel 4, the second elastic member 23 being fitted outside the connecting rod 27, the fixing portion 26 is provided with a through hole 28 for passing the connecting rod 27, wherein the second elastic member 23 is a compression spring.When the second sliding plate 20 is pulled in a direction away from the ratchet wheel 4, the connecting rod 27 passes through the through hole 28 of the fixing portion 26, and the first side plate 14 is also released from the limitation of the limitation groove 24, thereby applying a force away from the second side plate 15 to 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 two first 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 tightening device, the first handle of the upper body of the tightening device is held, and the upper body of the tightening device is continuously pressed in the direction of the lower body of the tightening 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 tightly wound, so as to secure the goods.When the goods are 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 teeth of the ratchet wheel, 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 member and is detached from the ratchet wheel, and at this time the ratchet wheel is in a free rotating state, 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 should 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).

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