Reinforced PTO shaft safety chain

Abstract

The utility model relates to a reinforced PTO shaft safety chain. The reinforced PTO shaft safety chain comprises a connecting chain, a connecting ring, an elastic fastener and a crossed hook which are connected in sequence. The crossed hook piece comprises a torsion spring, a first extending part, a second extending part, a first bending part and a second bending part, the torsion spring is connected with the connecting chain in a sleeving mode, the first extending part and the second extending part are integrally arranged at the two ends of the torsion spring respectively, and the first bending part is integrally arranged at the end of the first extending part; a second bending part is integrally arranged at the end part of the second extending part, and the first bending part and the second bending part are arranged in a crossed manner; and an opening is formed between the first bending part and the second bending part. Compared with the prior art, the PTO shaft safety chain has the advantages that the end structure, connected with other parts, of the PTO shaft safety chain is improved to be the crossed hook piece, the torsion spring of the crossed hook piece and the first bending portion and the second bending portion which are arranged in a crossed mode bear force together, strength is improved, bearing force is enhanced, and the PTO shaft safety chain is not prone to deformation and falling off in use and more stable in use.

Description

Technical Field

[0001] The utility model relates to the field of safety chains, in particular to a reinforced PTO shaft safety chain. Background Art

[0002] PTO shafts, also known as power take-off shafts, are widely used as transmission shafts in agricultural vehicles, such as lawn mowers, tillers, and rotary tillers. During installation, a plastic dust cover is installed over the PTO shaft to protect it from dust. During use, a safety chain is typically used to restrain the cover, preventing it from rotating with the PTO shaft.

[0003] Existing PTO shaft safety chains typically consist of an S-shaped hook, an elastic fastener, a connecting ring, and a connecting chain. For example, Chinese patent application number CN201921222350.7 discloses a welded PTO shaft safety chain that sequentially connects the S-shaped hook, connecting chain, connecting ring, and elastic fastener. During use, the S-shaped hook and elastic fastener are used to connect the two ends to other parts. While connecting to other parts via the S-shaped hook is convenient, the overall strength is insufficient. The S-shaped hook is easily deformed during actual use and can easily become unhooked during use, requiring improvement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a reinforced PTO shaft safety chain, which can solve the problems of insufficient strength, easy deformation and easy unhooking of the PTO shaft safety chain in the prior art during connection and use.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows: comprising a connecting chain, a connecting ring and an elastic fastener, and also comprising a cross-type hook, wherein the elastic fastener, the connecting ring, the connecting chain and the cross-type hook are connected in sequence;

[0006] The cross-shaped hook comprises a torsion spring, a first extension, a second extension, a first bent portion, and a second bent portion. The torsion spring is sleeved with the connecting chain. The first extension and the second extension are integrally provided at both ends of the torsion spring, respectively. The end of the first extension is integrally provided with the first bent portion, and the end of the second extension is integrally provided with the second bent portion. The bending directions of the first bent portion and the second bent portion are opposite, and the first bent portion and the second bent portion are intersectingly provided.

[0007] An opening is provided between the first bending portion and the second bending portion.

[0008] Furthermore, the angle between the first bending portion and the first extending portion is 120-130°; the angle between the second bending portion and the second extending portion is 120-130°.

[0009] Furthermore, the angle between the first bending portion and the first extending portion is 120°; the angle between the second bending portion and the second extending portion is 120°.

[0010] Furthermore, the connecting chain is formed by a plurality of single chain links that are connected to each other, and the single chain links are elliptical.

[0011] Furthermore, one end of the first bending portion away from the first extending portion is arranged in an arc shape, and one end of the second bending portion away from the second extending portion is arranged in an arc shape.

[0012] After adopting the above structure, the advantages of the utility model are: by improving the end structure connecting the PTO shaft safety chain with other parts into a cross-type hook, the torsion spring of the cross-type hook and the cross-arranged first bending part and second bending part are jointly subjected to force, the strength is increased, the bearing capacity is enhanced, it is not easy to deform or fall off during use, and it is more stable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic structural diagram of the cross-type hook of the present utility model. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments can enable those skilled in the art to more fully understand the present invention, but the present invention is not limited to the scope of the embodiments.

[0016] like Figure 1 As shown, this specific embodiment adopts the following technical solution: it includes a connecting chain 3, a connecting ring 2 and an elastic fastener 1, and also includes a cross-type hook 4. The elastic fastener 1, the connecting ring 2, the connecting chain 3, and the cross-type hook 4 are connected in sequence.

[0017] like Figure 2As shown, the cross-type hook 4 includes a torsion spring 41, a first extension portion 42, a second extension portion 43, a first bending portion 44 and a second bending portion 45. The connecting chain 3 is formed by a plurality of single chain links 31 that are mutually nested. The single chain link 31 is elliptical. The torsion spring 41 is nested with the single chain link 31 at the end of the connecting chain 3 away from the connecting ring 2. The two ends of the torsion spring 41 are respectively integrated with a first extension portion 42 and a second extension portion 43. The end of the first extension portion 42 is integrally provided with a first bending portion 44, and the end of the second extension portion 43 is integrally provided with a second bending portion 45. The bending directions of the first bending portion 44 and the second bending portion 45 are opposite, and the first bending portion 44 and the second bending portion 45 are cross-arranged.

[0018] An opening is provided between the first bending portion 44 and the second bending portion 45 to facilitate the connection operation.

[0019] The included angle between the first bending portion 44 and the first extending portion 42 is 120-130°. More preferably, the included angle between the first bending portion 44 and the first extending portion 42 is 120°.

[0020] The included angle between the second bending portion 45 and the second extending portion 43 is 120-130°. More preferably, the included angle between the second bending portion 45 and the second extending portion 43 is 120°.

[0021] One end of the first bending portion 44 away from the first extending portion 42 is in an arc shape, and one end of the second bending portion 45 away from the second extending portion 43 is in an arc shape, so that the operator will not be scratched during use, making it safer to use.

[0022] Working principle: The PTO shaft safety chain is formed by an elastic fastener 1, a connecting ring 2, a connecting chain 3, and a cross-type hook 4 which are connected in sequence. When the PTO shaft safety chain is connected to other components, the connection is achieved through the elastic fasteners 1 at both ends and the cross-type hook 4. There is an opening between the first bending portion 44 and the second bending portion 45 of the cross-type hook 4. When the cross-type hook 4 is connected, other parts are inserted from the opening between the first bending portion 44 and the second bending portion 45. The connection operation is convenient. After the connection is made, during use, the torsion spring 41 of the cross-type hook 4 and the cross-set first bending portion 44 and second bending portion 45 are subjected to force together, which increases the strength and the bearing capacity. It is not easy to deform or fall off during use, and is more stable to use.

[0023] The above shows and describes the basic principles and main features of the present invention, as well as the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforced PTO shaft safety chain, comprising a connecting chain, a connecting ring and an elastic fastener, characterized in that: It also includes a cross-type hook, wherein the elastic fastener, the connecting ring, the connecting chain, and the cross-type hook are connected in sequence; The cross-shaped hook comprises a torsion spring, a first extension, a second extension, a first bent portion, and a second bent portion. The torsion spring is sleeved with the connecting chain. The first extension and the second extension are integrally provided at both ends of the torsion spring, respectively. The end of the first extension is integrally provided with the first bent portion, and the end of the second extension is integrally provided with the second bent portion. The bending directions of the first bent portion and the second bent portion are opposite, and the first bent portion and the second bent portion are intersectingly provided. An opening is provided between the first bending portion and the second bending portion.

2. A reinforced PTO shaft safety chain according to claim 1, characterized in that: The included angle between the first bending portion and the first extending portion is 120-130°; the included angle between the second bending portion and the second extending portion is 120-130°.

3. The reinforced PTO shaft safety chain according to claim 1, characterized in that: The included angle between the first bending portion and the first extending portion is 120°; the included angle between the second bending portion and the second extending portion is 120°.

4. The reinforced PTO shaft safety chain according to claim 1, characterized in that: The connecting chain is formed by a plurality of single chain links which are sleeved together, and the single chain links are oval in shape.

5. The reinforced PTO shaft safety chain according to claim 1, characterized in that: One end of the first bending portion away from the first extending portion is arranged in an arc shape, and one end of the second bending portion away from the second extending portion is arranged in an arc shape.

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