Chain tensioner

Abstract

Chain tensioner comprising a body (1), a handle (2), a toothed stop plate (3), a hand lever (4), a chain (5) and a pivot shaft (6), wherein a first hook (7) is attached to the body (1), wherein the handle (2) is pivoted to the body (1) by means of the pivot shaft (6), to which a ratchet (9) is fixedly attached, wherein the aforementioned toothed stop plate (3) is movably attached to the body (1) and embedded in the ratchet (9), wherein the aforementioned hand lever (4) is movably attached to the handle (2) and embedded in the ratchet (9), wherein the center of the chain (5) lies within the body (1) and is wound on the pivot shaft (6), wherein the two ends of the chain (5) protrude from the body (1) and a second hook (8) is fixedly attached to one of the two ends of the chain (5), wherein a spring (14) is provided between the toothed stop plate (3) and the body (1), which tooth stop plate (3) shows such a tendencythat it is applied to the ratchet (9), that a positioning part (13) is also provided on the body (1), that the two ends of the spring (14) each act on the positioning part (13) and the toothed stop plate (3), characterized in that a sliding part (10) is provided on the axis of rotation (6) which allows the chain (5) to be displaced, and a cover plate (11) is also provided inside the body (1), which encloses the outside of the sliding part (10), wherein a contact (5b) of the aforementioned chain (5) lies between the cover plate (11) and the sliding part (10), and the cover plate (11) has a guide structure that guides the contact (5b) of the chain (5) during movement, wherein a sub-cover plate (15) is fixedly attached to the end of the cover plate (11), which has a number of connecting holes (15a), wherein the body (1) has a number of connecting holes (15a) corresponding connectors (1b) which align with the connecting holes (15a),exhibits and each of the connectors (1b) engages firmly in the corresponding connecting hole (15a), wherein the edge of the sub-cover plate (15) has a raised edge (15b) projecting towards the body (1), which is attached to the outside of the body (1).

Description

Technical field

[0001] The invention provides a tensioner, in particular a chain tensioner, for binding goods, which relates to the field of mechanical engineering. State of the art

[0002] When transporting goods by vehicle, rail, and ship, the goods are often securely fastened to prevent damage and loss during transport due to swaying, vibration, and collisions. Tensioners are frequently used in this process. Typically, the goods are secured with straps, and then the tensioner tightens them.

[0003] The existing tensioner essentially comprises a body, a handle, a strap, and two hooks, the two hooks being arranged on the strap. A unidirectional rotating mechanism is mounted on the body. When tying goods, the two hooks are placed on either side of the goods, and then the handle is rotated back and forth to retract the strap and tighten the goods. However, for goods with relatively large volumes and weights, the standard strap-based tying method is prone to slippage, and the strap's maximum load-bearing capacity is limited, so tearing is common when tying large goods. Furthermore, the strap simply wears down and corrodes during use, resulting in incalculable losses.

[0004] Chinese patent application CN2182151Y describes a quick-release tie consisting of a rope section, a locking section, and a housing. The rope section comprises a chain hook and a rope hook, attached to both sides of the body. The locking section consists of a handle, a ratchet, a claw, and a ratchet. The rope section is moved by the locking section. Following the movement of the rope section, the goods are tightened by its chain hook and rope hook. However, the rope is still used in a manner similar to straps. This leads to the same problem: the quick-release tie does not yet provide sufficient binding strength for goods with larger volumes and heavier weights.

[0005] At the same time, the body of the present tensioner is a single piece, which requires a body with relatively many anisotropic structures and thus makes the processing of the body more difficult.

[0006] Further quick binders are known through the Chinese registrations CN201784815U and CN201703575U. Description of the invention

[0007] The object of the present invention addresses problems existing in the prior art. A chain tensioner is provided that possesses high operational stability and a compact design.

[0008] This problem is solved by the following embodiment: A chain tensioner consists of a body, a handle, a toothed stop plate, a hand lever, a chain, and a pivot shaft, wherein a first hook is attached to the body, wherein the handle is articulated to the body by means of the pivot shaft to which a ratchet is fixedly attached, wherein the aforementioned toothed stop plate is movably attached to the body and embedded in the ratchet, wherein the aforementioned hand lever is movably attached to the handle and embedded in the ratchet, wherein the center of the chain lies within the body and is wound on the pivot shaft, wherein the two ends of the chain protrude from the body and a second hook is fixedly attached to one of the two ends of the chain, wherein a spring is provided between the toothed stop plate and the body, which gives the toothed stop plate such a tendency that it is pressed against the ratchet.that a positioning part is also provided on the body, that the two ends of the spring each act on the positioning part and the toothed stop plate, wherein a sliding part for the chain is provided on the axis of rotation, and a cover plate is also provided inside the body, which encases the outside of the sliding part, wherein the aforementioned chain is in contact between the cover plate and the sliding part, and the cover plate has a guide structure that guides the contact of the chain during movement, wherein a sub-cover plate is firmly attached to the end of the cover plate, which has a number of connecting holes, wherein the body has a number of connectors corresponding to the connecting holes, which coincide with the connecting holes, and each of the connectors engages firmly in the corresponding connecting hole, wherein the edge of the sub-cover plate has a raised edge projecting towards the body.which is attached to the outside of the body.

[0009] With this chain tensioner, the ratchet's rotation is accelerated by the hand lever on the handle as the handle is pulled back and forth. Simultaneously, the ratchet can only rotate unidirectionally due to the action of the toothed stop plate.

[0010] The rotation of the pivot point is driven by the rotation of the ratchet, and then the movement of the chain is driven by the rotation of the pivot point. Obviously, the second hook at the end of the chain will move along with the chain. The goods are either released or secured according to the movement of the second hook.

[0011] In the aforementioned chain tensioner, the first hook is connected to the body via a connecting shaft. One end of the positioning part is also connected to the body via a connecting shaft, and a clamping structure lies between the other end of the positioning part and the body.

[0012] The two ends of the positioning part are each secured by the connecting shaft and the clamping structure in such a way that the positioning part is firmly and permanently connected to the body.

[0013] In the aforementioned chain tensioner, the clamping structure is a protruding projection on the positioning part and a base on the body, with the projection being embedded in the base.

[0014] In the aforementioned chain tensioner, the clamping structure consists of a base on the positioning part and a protruding projection on the body, the projection being embedded in the base.

[0015] The positioning part is firmly connected to the body via a plug connection.

[0016] In the aforementioned chain tensioner, a strip-shaped guide rail is provided on the toothed stop plate, which partially penetrates the positioning part, wherein the aforementioned spring is a coil spring and the spring is mounted on the guide rail.

[0017] By pre-positioning the spring with the guide strip in conjunction with the aforementioned positioning part, the spring is positioned between the positioning part and the body in such a way that the spring cannot fall off.

[0018] In the aforementioned chain tensioner, a sliding element is provided on the axis of rotation, allowing the chain to be moved, and a cover plate is also provided inside the body, which encases the outside of the sliding element, with the aforementioned chain in contact between the cover plate and the sliding element.

[0019] The ingress of dirt and dust can be effectively prevented by covering the contact of the chain with the cover plate.

[0020] In the aforementioned chain tensioner, the cover plate has a guide structure that directs the contact of the chain during movement.

[0021] Under the influence of the guide structure, the chain does not coil up during the chain's movement.

[0022] In the aforementioned chain tensioner, the guide structure is a continuous mounting hole in the cover plate and two chain grooves communicating with the mounting hole, each located on both sides of the mounting hole, wherein the aforementioned pusher part lies at the mounting hole and the two chain grooves are penetrated by the contact of the aforementioned chain.

[0023] The sliding element is enclosed by the mounting hole of the cover plate. The chain's contact penetrates through the two chain grooves, which guide the chain's movement.

[0024] In the aforementioned chain tensioner, a sub-cover plate is firmly attached to the end of the cover plate, which has a number of connection holes, the body having a number of connectors corresponding to the connection holes, which overlap with the connection holes, and each of the connectors firmly engages in the corresponding connection hole.

[0025] After the connection holes have been drilled, the outer end of the connectors is soldered in such a way that the connectors are firmly and permanently connected to the cover plate.

[0026] In the aforementioned chain tensioner, the edge of the sub-cover plate has a raised lip that protrudes towards the body and is attached to the outside of the body. This lip results in a smooth, cornerless edge for the tensioner.

[0027] In the aforementioned chain tensioner, the chain grooves are cross-shaped. The chain can move smoothly through the cross-shaped holes in the chain grooves because each chain pitch is offset by 90 degrees from the others.

[0028] In the aforementioned chain tensioner, the pusher part consists of a cylindrical cylinder body and a number of pull heads protruding from the outside of the cylinder body, wherein the pusher part is mounted on the axis of rotation and the pusher part and the axis of rotation are firmly connected to each other around the circumference.

[0029] The cylindrical body of the pusher is firmly connected around its circumference to the axis of rotation, whereby the movement of the chain is promoted by means of its pull heads during the rotation of the pusher.

[0030] In the aforementioned chain tensioner, the drawing heads consist of two L-shaped drawing discs arranged symmetrically to the sides of the body. Their outer ends are bent towards the center of the body, and the distance between the ends of the two drawing discs is slightly greater than the thickness of the chain links. The distance between the two L-shaped drawing discs is exactly equal to the width of the vertical chain, while the width of the lateral chain is greater than the distance between the two drawing discs. With this design, the lateral chain is fed by the drawing discs, thus moving the chain along with the vertical chain.

[0031] The aforementioned chain tensioner has a mounting space within its body, adapted to the cover plate, in which the cover plate is housed. The cover plate is positioned within this mounting space in such a way that it cannot detach or fall off.

[0032] In the aforementioned chain tensioner, the handle comprises a connecting part and a stem, wherein the connecting part is U-shaped and its ends located at the opening are hinged to the body, with the two sides of the connecting part being fixed with decorative plates.

[0033] The decorative panels are usually made of plastic. The appearance of the tensioners is enhanced by using colored plastic for the decorative panels.

[0034] In the aforementioned chain tensioner, the outside of the connecting part of the handle has a concave connecting groove, whereby the aforementioned decorative plates are fixed in the connecting groove and are flush with the outside of the handle.

[0035] Such a structure flattens the sides of the body.

[0036] In the aforementioned chain tensioner, the first hook comprises a connecting head, a connecting rod, and a hook body. The connecting head is U-shaped, and the ends of the U-shape are hinged to the body. One end of the connecting rod has a larger-diameter plug, and the other end of the connecting rod is hinged to the hook body. The connecting rod passes through the connecting head, and its plug is located within the connecting head. This design allows the hook body of the first hook to be rotated freely, making it suitable for any hanging position.

[0037] In the aforementioned chain tensioner, the second hook comprises a connecting head, a connecting rod, and a hook body. The connecting head is U-shaped, and the ends of the U-shape are hinged to the end of the chain. One end of the connecting rod has a larger-diameter plug, and the other end of the connecting rod is hinged to the hook body. The connecting rod passes through the connecting head, and the plug is located within the connecting head. This design allows the hook body of the second hook to be rotated freely, making it suitable for any hanging position.

[0038] Compared to the prior art, this chain tensioner protects against the ingress of dirt and dust by covering the chain at the push end with the cover plate. The overall stability of the chain tensioner is further enhanced because the connection between the cover plate and the body is flat, and the raised edge of the cover plate creates a smooth transition between the tensioner's outer surfaces. The entire tensioner naturally boasts a compact design and an attractive appearance, as the contact between the chain and the push end is covered by the cover plate, and the decorative plates are positioned on the outer sides of the handle.

[0039] At the same time, separating the positioning part from the body simplifies the processing of both components, and thus also facilitates the joining of the body to the positioning part. Therefore, the manufacturing of the entire clamp is simplified, and consequently, the clamp's construction is straightforward.

[0040] Furthermore, the construction of the first hook and the second hook is relatively simple and both can be rotated voluntarily. Brief description of the drawing Fig. Figure 1 shows the schematic sectional view of the chain tensioner according to the invention, Fig. 2 shows the schematic top view of the chain tensioner according to the invention, Fig. Figure 3 shows the schematic perspective exploded view of the chain tensioner according to the invention, Fig. Figure 4 shows the schematic main view of the connection between the push part and the ratchet in the chain tensioner according to the invention. Fig. Figure 5 shows the schematic perspective view of the connection between the pusher part and the ratchet in the chain tensioner according to the invention.

[0041] The figures show the following components: the body 1, the base 1a, the connector 1b, the handle 2, the connecting part 2a, the connecting groove 2a1, the stem 2b, the toothed stop plate 3, the guide strip 3a, the hand lever 4, the chain 5, the free end 5a, the contact 5b, the pivot axis 6, the first hook 7, the second hook 8, the ratchet 9, the push part 10, the cylinder body 10a, the pull head 10b, the cover plate 11, the mounting hole 11a, the chain groove 11b, the decorative plate 12, the positioning part 13, the projection 13a, the spring 14, the sub-cover plate 15, the connecting hole 15a, the upstand 15b. Preferred embodiment of the invention

[0042] This chain tensioner is used for securing goods. It consists of a body 1, a handle 2, a toothed stop plate 3, a hand lever 4, a chain 5, a pivot axle 6, a first hook 7 and a second hook 8, etc., as shown in the Fig. 1, Fig. 2 and Fig. 3 shown.

[0043] The first hook 7 is connected to the body 1, and the handle 2 is articulated to the body 1 via the pivot axis 6, to which a ratchet 9 is rigidly attached. A pusher 10 is rigidly connected to the center of the pivot axis 6. The pusher 10 consists of a cylindrical body 10a and a number of pull heads 10b projecting from the outside of the cylindrical body 10a. The pusher 10 is mounted on the pivot axis 6, and the pusher 10 and the pivot axis are rigidly connected to each other around their circumference.

[0044] The handle 2 comprises a connecting part 2a and a stem 2b, wherein the connecting part 2a is U-shaped and its ends located at the opening are hinged to the body 1, the two sides of the connecting part 2a being fixed with decorative plates 12. The outer surface of the connecting part 2a of the handle 2 has a concave connecting groove 2a1, wherein the decorative plates 12 are fixed in the connecting groove 2a1 and are flush with the outer surface of the handle 2.

[0045] As in the Fig. 4 and Fig. As shown in Figure 5, the drawing heads 10b are two L-shaped drawing discs arranged symmetrically to the sides of the body 1, the outer ends of which are folded towards the center of the body 1 and the distance between the ends of the two drawing discs is slightly greater than the thickness of the chain rings of the chain 5.

[0046] The toothed stop plate 3 is movably connected to the body 1, and a spring is provided between the toothed stop plate 3 and the body 1, under the action of which the toothed stop plate 3 is embedded in the ratchet 9. The hand lever 4 is movably connected to the handle 2, and a spring is provided between the handle 2 and the hand lever 4, under the action of which the hand lever 4 is embedded in the ratchet 9.

[0047] One end of the positioning part 13 is articulated to the body 1 by a connecting shaft, and a clamping structure is located between the other end of the positioning part 13 and the body 1. The clamping structure consists of a base on the positioning part 13 and a projecting projection 13a on the body, the projection being embedded in the base. Depending on the application, the clamping structure may be a projecting projection 13a on the positioning part 13 and a base 1a on the body 1, with the projection 13a being embedded in the base 1a.

[0048] A spring 14 is provided between the toothed stop plate 3 and the body 1, which gives the toothed stop plate 3 a tendency to bear against the ratchet 9, with the two ends of the spring 14 acting on the positioning part 13 and the toothed stop plate 3 respectively. In the present embodiment, a strip-shaped guide rail 3a is provided on the toothed stop plate 3, which partially penetrates the positioning part 13, wherein the spring 14 is a coil spring and the spring 14 is mounted on the guide rail 3a.

[0049] One end of the chain 5 is firmly connected to the second hook 8, while the other end of the chain 5 is a free end 5a. The middle of the chain 5 is a contact 5b. The contact 5b of the chain 5 lies inside the body 1 and is wound onto the pusher 10, with the second hook 8 and the free end 5a of the chain 5 protruding from the body 1.

[0050] Within the body 1 a cover plate 11 is also provided and a mounting space is arranged in the body 1, with the cover plate 11 being located at the mounting space.

[0051] The cover plate 11 has a guide structure that guides the contact 5b of the chain 5 during movement. The guide structure is a through mounting hole 11a in the cover plate 11 and two chain grooves 11b communicating with the mounting hole, each located on either side of the mounting hole 11a, with the aforementioned push element 10 resting at the mounting hole 11a and the two chain grooves 11b being penetrated by the contact 5b of the aforementioned chain 5. In the present embodiment, the chain grooves 11b are cross-shaped holes.

[0052] A sub-cover plate 15 is firmly attached to the end of the cover plate 11. The sub-cover plate has a number of connection holes 15a, and the body 1 has a number of connectors 1b corresponding to the connection holes 15a. These connectors 1b align with the connection holes 15a, and each connector 1b engages firmly in the corresponding connection hole 15a. The edge of the sub-cover plate 15 has a raised lip 15b projecting towards the body 1, which is attached to the outside of the body 1.

[0053] The contact 5b of the chain 5 is located between the pusher part 10 and the cover plate 11 and the contact 5b of the chain 5 is located on the guide structure.

[0054] During the use of the chain tensioner according to the invention, the handle 2 is pulled back and forth, and then the rotation of the ratchet 9 is facilitated by the hand lever 4 on the handle 2. At the same time, during the pulling process of the handle 2, the ratchet 9 can only be rotated unidirectionally under the influence of the toothed stop plate 3.

[0055] When the ratchet 9 is rotated, the pivot 6 is also rotated. When the pusher 10 rotates on the pivot 6, the contact 5b of the chain 5 is moved by the puller 10b on the pusher. Meanwhile, the movement of the chain 5, guided by the cover plate 11, ensures smooth movement without coiling. Clearly, the chain 5 can only be moved continuously and unidirectionally by pulling the handle 2. After the chain 5 has moved, the distance between the second hook 8 and the first hook 7 is reduced, thus securing the goods with the first hook 7 and the second hook 8.

[0056] Furthermore, the first hook 7 comprises a connecting head, a connecting rod and a hook body, wherein the aforementioned connecting head is U-shaped and the ends of the U-shape of the connecting head are hinged to the body 1, wherein one end of the connecting rod has a larger dimensioned plug and the other end of the connecting rod is hinged to the hook body, wherein the connecting rod penetrates through the connecting head and its plug lies inside the connecting head.The second hook 8 comprises a connecting head, a connecting rod and a hook body, wherein the aforementioned connecting head is U-shaped and the ends of the U-shape of the connecting head are hinged to the end of the chain, wherein one end of the connecting rod has a larger dimensioned plug and the other end of the connecting rod is hinged to the hook body, wherein the connecting rod penetrates through the connecting head and its plug lies inside the connecting head.

Claims

[1] Chain tensioner comprising a body (1), a handle (2), a toothed stop plate (3), a hand lever (4), a chain (5) and a pivot shaft (6), wherein a first hook (7) is attached to the body (1), wherein the handle (2) is pivoted to the body (1) by means of the pivot shaft (6) to which a ratchet (9) is fixedly attached, wherein the aforementioned toothed stop plate (3) is movably attached to the body (1) and embedded in the ratchet (9), wherein the aforementioned hand lever (4) is movably attached to the handle (2) and embedded in the ratchet (9), wherein the center of the chain (5) lies within the body (1) and is wound on the pivot shaft (6), wherein the two ends of the chain (5) protrude from the body (1) and a second hook (8) is fixedly attached to one of the two ends of the chain (5), wherein a spring (14) is provided between the toothed stop plate (3) and the body (1),which gives the toothed stop plate (3) such a tendency that it is applied to the ratchet (9), that a positioning part (13) is also provided on the body (1), that the two ends of the spring (14) each act on the positioning part (13) and the toothed stop plate (3), , characterized by, that a sliding element (10) is provided on the axis of rotation (6) which allows the chain (5) to be moved, and that a cover plate (11) is also provided within the body (1) which encases the outside of the sliding element (10), wherein a contact (5b) of the aforementioned chain (5) lies between the cover plate (11) and the sliding element (10), and the cover plate (11) has a guide structure which guides the contact (5b) of the chain (5) during movement, wherein a sub-cover plate (15) is fixedly attached to the end of the cover plate (11) and has a number of connecting holes (15a), wherein the body (1) has a number of connectors (1b) corresponding to the connecting holes (15a) which are aligned with the connecting holes (15a), and each of the connectors (1b) engages firmly in the corresponding connecting hole (15a), wherein the edge of the sub-cover plate (15) has a The body (1) has a protruding raised edge (15b) which is attached to the outside of the body (1). [2] Chain tensioner according to claim 1, characterized by , that the first hook (7) is articulated to the body (1) by a connecting shaft, that one end of the positioning part (13) is articulated to the body (1) by a connecting shaft, and that a clamping structure lies between the other end of the positioning part (13) and the body (1). [3] Chain tensioner according to claim 2, characterized by , that the clamping structure is a protruding projection (13a) on the positioning part (13) and a base (1a) on the body (1), wherein the projection (13a) is embedded in the base (1a). [4] Chain tensioner according to claim 2, characterized by , that the clamping structure is a base (1a) on the positioning part (13) and a protruding projection (13a) on the body (1), wherein the projection (13a) is embedded in the base (1a). [5] Chain tensioner according to claim 1, 2, 3 or 4, characterized by, that a strip-shaped guide rail (3a) is provided on the tooth stop plate (3) which partially penetrates the positioning part (13), that the aforementioned spring (14) is a coil spring (14) and the spring (14) is mounted on the guide rail (3a). [6] Chain tensioner according to claim 1, characterized by , that the guide structure is a continuous mounting hole (11a) in the cover plate (11) and two chain grooves (11b) communicating with the mounting hole, each located on the two sides of the mounting hole (11a), wherein the aforementioned push part is located at the mounting hole (11a) and the two chain grooves (11b) are penetrated by the contact (5b) of the aforementioned chain (5). [7] Chain tensioner according to claim 6, characterized by , that the chain grooves (11b) are cross holes. [8] Chain tensioner according to claim 1, 2, 3 or 4, characterized by, that the pusher part (10) consists of a cylindrical cylinder body (10a) and a number of pull heads protruding from the outside of the cylinder body (10a), wherein the pusher part (10) is mounted on the axis of rotation (6) and the pusher part and the axis of rotation are firmly connected to each other around the circumference. [9] Chain tensioner according to claim 8, characterized by , that the drawing heads are two L-shaped drawing discs arranged symmetrically to the sides of the body (1), the outer ends of which are folded towards the center of the body (1) and the distance between the ends of the two drawing discs is slightly greater than the thickness of the chain rings of the chain (5). [10] Chain tensioner according to claim 1, 2, 3 or 4, characterized by , that within the body (1) a mounting space adapted to the cover plate (11) is provided in which the aforementioned cover plate (11) is accommodated. [11] Chain tensioner according to claim 1, 2, 3 or 4, characterized by, that the handle (2) comprises a connecting part (2a) and a stem (2b), wherein the connecting part (2a) is U-shaped and its ends located at the opening are hinged to the body (1), wherein the two sides of the connecting part (2a) are fixed with decorative plates (12). [12] Chain tensioner according to claim 11, characterized by , that the outside of the connecting part (2a) of the handle (2) has a concave connecting groove (2a1), wherein the aforementioned decorative plates (12) are fixed in the connecting groove (2a1) and are flush with the outside of the handle (2). [13] Chain tensioner according to claim 1, 2, 3 or 4, characterized by, that the first hook (7) comprises a connecting head (1b), a connecting rod and a hook body, wherein the aforementioned connecting head (1b) is U-shaped and the ends of the U-shape of the connecting head (1b) are hinged to the body (1), wherein one end of the connecting rod has a larger dimensioned plug and the other end of the connecting rod is hinged to the hook body, wherein the connecting rod penetrates the connecting head (1b) and its plug lies inside the connecting head (1b). [14] Chain tensioner according to claim 1, 2, 3 or 4, characterized by, that the second hook (8) comprises a connecting head (1b), a connecting rod and a hook body, wherein the aforementioned connecting head (1b) is U-shaped and the ends of the U-shape of the connecting head (1b) are hinged to the end of the chain (5), wherein one end of the connecting rod has a larger dimensioned plug and the other end of the connecting rod is hinged to the hook body, wherein the connecting rod penetrates the connecting head (1b) and its plug lies inside the connecting head (1b).

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