Chain tensioner

Abstract

The utility model relates to a chain tensioner. The chain tensioner comprises an inserting rod, a pull rod and an adjusting nut. During use, two ends of the chain respectively bypass the two chain wheels and are oppositely arranged, at the moment, one end, far away from the through hole, of the insertion rod is inserted into the chain on two sides of one chain wheel to fix one end of the chain, then the second rod section is inserted into the other end of the chain, and then a worker rotates the adjusting nut in a manual or mechanical driving mode. And the first rod section drives the second rod section to move in the direction close to the inserting rod, so that the distance between the inserting rod and the second rod section is reduced to a proper distance, and the two ends of the chain can be conveyed and butted. Therefore, by using the chain tensioner, the installation of the chain is more labor-saving, even if a large chain is installed, the installation work of the chain can be easily completed by only one person, the labor cost is greatly reduced, and the installation efficiency of the chain is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chain installation tools, in particular to a chain tensioner. Background Art

[0002] Chains are generally metal links or rings, often used for mechanical transmission and traction. Transmission chains are the primary transmission device of modern mechanical equipment, and are key components that connect the connected parts of a machine into a compact whole, thereby improving mechanical performance. During chain installation, the two ends of the chain need to be connected by passing them around two sprockets. At this point, workers need to manually pull the two ends of the chain closer together until the two ends of the chain can be connected.

[0003] However, because there are certain requirements for the tension of the chain during installation, it is very difficult to manually pull the two ends of the chain to connect them. Especially for large chains on some large machinery, which are very heavy, it often requires more than two workers to pull the two ends of the chain to connect them, which is time-consuming and labor-intensive, resulting in low chain installation efficiency and high labor costs. Utility Model Content

[0004] Based on this, it is necessary to provide a chain tensioner that saves time and effort in chain installation, improves chain installation efficiency and reduces labor costs.

[0005] A chain tensioner comprising:

[0006] An insertion rod having a through hole at one end; an end of the insertion rod away from the through hole is used to sequentially insert one end of the chain at positions on both sides of a sprocket;

[0007] The pull rod comprises a first rod segment and a second rod segment connected in sequence; the second rod segment is bent relative to the first rod segment so that the pull rod is L-shaped; the end of the first rod segment away from the second rod segment has an external thread; the end of the first rod segment with the external thread passes through the through hole; the end of the second rod segment away from the first rod segment is used to insert into the other end of the chain;

[0008] An adjusting nut is screwed onto the external thread and can abut against the insertion rod;

[0009] The adjusting nut is operably rotated to adjust the distance between the insertion rod and the second rod segment.

[0010] In one embodiment, the insertion rod includes a rod body and a sleeve transversely fixed to one end of the rod body; the inner hole of the sleeve serves as the through hole.

[0011] In one embodiment, in a direction perpendicular to the first rod segment, the length of the rod body is greater than the length of the second rod segment.

[0012] In one embodiment, the first rod segment includes a rod segment body and a threaded rod fixed to one end of the rod segment body; one end of the first rod segment is connected to an end of the rod segment body away from the threaded rod.

[0013] In one embodiment, the threaded rod is a bolt, and the end of the rod segment body away from one end of the second rod segment is fixedly connected to the nut of the bolt.

[0014] In one embodiment, the adjusting nut is a butterfly nut.

[0015] In one embodiment, the second rod segment is perpendicular to the first rod segment and is arranged parallel to the insertion rod.

[0016] When the chain tensioner is used, the two ends of the chain are respectively passed around two sprockets and arranged opposite to each other. At this time, the end of the rod away from the through hole is inserted into the chain on both sides of a sprocket to fix one end of the chain. The second rod segment is then inserted into the other end of the chain. After that, the staff rotates the adjustment nut manually or mechanically, so that the first rod segment drives the second rod segment to move in the direction close to the rod, so as to reduce the distance between the rod and the second rod segment to a suitable distance to ensure that the two ends of the chain can be transported and docked. Therefore, the use of the chain tensioner makes the installation of the chain more labor-saving. Even for the installation of large chains, only one person is needed to easily complete the chain installation work, which greatly reduces labor costs and effectively improves the efficiency of chain installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of an application scenario of a chain tensioner in one embodiment of the present utility model;

[0018] Figure 2 This is a structural diagram of a chain tensioner in a preferred embodiment of the present utility model;

[0019] Figure 3 for Figure 2 A front view of the chain tensioner shown;

[0020] Figure 4 for Figure 2 Schematic diagram of the structure of the inserted rod in the chain tensioner shown.

[0021] Explanation of reference numerals: 100, chain tensioner; 110, insertion rod; 111, through hole; 112, rod body; 113, sleeve; 120, pull rod; 121, first rod segment; 1211, rod segment body; 1212, threaded rod; 122, second rod segment; 130, adjusting nut; 10, chain; 20, sprocket. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also exist. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also exist.

[0025] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0026] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0027] See also Figures 1 to 3 In a preferred embodiment of the present invention, the chain tensioner 100 includes an insert rod 110 , a pull rod 120 and an adjusting nut 130 .

[0028] Please also refer to Figure 4, one end of the insertion rod 110 has a through hole 111. The end of the insertion rod 110 away from the through hole 111 is used to sequentially insert one end of the chain 10 at a position on both sides of a sprocket 20. The pull rod 120 includes a first rod segment 121 and a second rod segment 122 connected in sequence. The second rod segment 122 is bent relative to the first rod segment 121, so that the pull rod 120 is L-shaped. The end of the first rod segment 121 away from the second rod segment 122 has an external thread. The end of the first rod segment 121 with the external thread passes through the through hole 111. The end of the second rod segment 122 away from the first rod segment 121 is used to insert the other end of the chain 10.

[0029] The adjusting nut 130 is threaded onto the external thread and can abut against the insertion rod 110. The adjusting nut 130 can be rotated to adjust the distance between the insertion rod 110 and the second rod section 122. The adjusting nut 130 can be a hexagonal nut, a four-claw nut, a butterfly nut, a square nut, a flange nut, etc.

[0030] Please refer again Figures 1 to 3 When the chain tensioner 100 is in use, the two ends of the chain 10 are respectively passed around the two sprockets 20 and arranged opposite to each other. At this time, the end of the insertion rod 110 away from the through hole 111 is inserted into the chain 10 on both sides of a sprocket 20 to fix one end of the chain 10. Then, the second rod segment 122 is inserted into the other end of the chain 10. After that, the staff rotates the adjustment nut 130 manually or mechanically, so that the first rod segment 121 drives the second rod segment 122 to move in the direction close to the insertion rod 110, so as to reduce the distance between the insertion rod 110 and the second rod segment 122 to a suitable distance to ensure that the two ends of the chain 10 can be transported and docked. Therefore, the use of the chain tensioner 100 makes the installation of the chain 10 more labor-saving. Even for the installation of a large chain 10, only one person is needed to easily complete the installation of the chain 10, which greatly reduces labor costs and effectively improves the efficiency of chain 10 installation.

[0031] In some embodiments, the insertion rod 110 includes a rod body 112 and a sleeve 113 transversely fixed to one end of the rod body 112. The inner hole of the sleeve 113 serves as the through hole 111. The sleeve 113 can be fixed to the end face of one end of the rod body 112 or to the side of one end of the rod body 112. The sleeve 113 can also be a section cut from a pipe or other existing parts of suitable size, such as a bolt with a hole, a pin with a hole, a sleeve, or other existing parts.

[0032] In this way, the insertion rod 110 is divided into two parts, the rod body 112 and the sleeve 113, and is formed separately. There is no need to drill a hole on the rod body 112. The sleeve 113, which has a through hole, can be directly fixed to one end of the rod body 112 by welding, screwing, etc., which makes the processing of the insertion rod 110 simpler and effectively improves the processing efficiency of the chain tensioner 100.

[0033] Of course, in other embodiments, the through hole 111 may be directly opened at one end of the rod body 112 to form the insertion rod 110 .

[0034] Furthermore, in some embodiments, the length of the rod body 112 is greater than the length of the second rod segment 122 in a direction perpendicular to the first rod segment 121. That is, the distance from the end of the rod body 112 distal to the sleeve 113 to the first rod segment 121 is greater than the distance from the end of the second rod segment 122 distal to the first rod segment 121 to the second rod segment 122. This ensures that during use of the chain tensioner 100, the rod body 112 can be fully inserted into the chain 10 on both sides of the same sprocket 20 to secure one end of the chain 10. At the same time, the second rod segment 122 can be inserted into the other end of the chain 10 without contacting other parts of the chain 10. This ensures that the chain tensioner 100 tensions the chain 10 more smoothly and steadily, avoids friction between the second rod segment 122 and the chain 10 during tensioning, and thus extends the service life of the chain tensioner 100.

[0035] In some embodiments, the first rod segment 121 includes a rod segment body 1211 and a threaded rod 1212 fixed to one end of the rod segment body 1211. One end of the first rod segment 121 is connected to the end of the rod segment body 1211 away from the threaded rod 1212. Specifically, in this embodiment, the threaded rod 1212 is coaxial with the rod segment body 1211. Of course, in other embodiments, the rod segment body 1211 and the threaded rod 1212 do not need to be coaxial, as long as the connection between them is secure.

[0036] Among them, the threaded rod 1212 can be a standard threaded part such as a fully threaded rod, a bolt, or a screw. Since the threaded rod 1212 is a standard part, its processing cost is relatively low. The method of directly fixing the threaded rod 1212 on the rod segment body 1211 to obtain the first rod segment 121 can greatly reduce the processing cost of the pull rod 120 and improve the processing efficiency of the pull rod 120.

[0037] The rod segment body 1211 and the second rod segment 122 may be an assembled structure formed by being fixedly connected by welding, screwing, etc., or may be an integrally formed structure formed by mechanically bending a rod.

[0038] Of course, in other embodiments, the first rod segment 121 may also be obtained by machining an external thread on the end of the rod segment body 1211 away from the second rod segment 122 .

[0039] Furthermore, in some embodiments, the threaded rod 1212 is a bolt, and the end of the rod segment body 1211 away from the second rod segment 122 is fixedly connected to the nut of the bolt. Because bolts are available in a variety of sizes, the threaded rod 1212 is configured as a bolt. As long as the bolt is matched with a rod segment body 1211 of appropriate strength, chain tensioners 100 of different sizes can be obtained to meet the tensioning and installation requirements of chains 10 of different sizes.

[0040] In some embodiments, the adjusting nut 130 is a butterfly nut. The adjusting nut 130 is set as a butterfly nut to facilitate manual rotation of the nut by a worker, thereby improving the convenience of manual operation of the chain tensioner 100.

[0041] In some embodiments, the second rod segment 122 is perpendicular to the first rod segment 121 and is arranged parallel to the insertion rod 110. This ensures that the insertion rod 110 and the second rod segment 122 can be vertically inserted into the links of the corresponding positions of the chain 10, and in the process of rotating the adjusting nut 130 to pull one end of the chain 10 toward the other end of the chain 10 through the second rod segment 122, the insertion rod 110 or the second rod segment 122 can be prevented from slipping out of the links of the chain 10, thereby improving the reliability of the chain tensioner 100.

[0042] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A chain tensioner, characterized in that: include: An insertion rod having a through hole at one end; an end of the insertion rod away from the through hole is used to sequentially insert one end of the chain at positions on both sides of a sprocket; The pull rod comprises a first rod segment and a second rod segment connected in sequence; the second rod segment is bent relative to the first rod segment so that the pull rod is L-shaped; the end of the first rod segment away from the second rod segment has an external thread; the end of the first rod segment with the external thread passes through the through hole; the end of the second rod segment away from the first rod segment is used to insert into the other end of the chain; An adjusting nut is screwed onto the external thread and can abut against the insertion rod; The adjusting nut is operably rotated to adjust the distance between the insertion rod and the second rod segment.

2. The chain tensioner according to claim 1, characterized in that The insertion rod includes a rod body and a sleeve transversely fixed to one end of the rod body; the inner hole of the sleeve serves as the through hole.

3. The chain tensioner according to claim 2, characterized in that: In a direction perpendicular to the first rod segment, the length of the rod body is greater than the length of the second rod segment.

4. The chain tensioner according to claim 1, characterized in that The first rod segment includes a rod segment body and a threaded rod fixed to one end of the rod segment body; one end of the first rod segment is connected to an end of the rod segment body away from the threaded rod.

5. The chain tensioner according to claim 4, characterized in that: The threaded rod is a bolt, and the end of the rod segment body away from one end of the second rod segment is fixedly connected to the nut of the bolt.

6. The chain tensioner according to claim 1, characterized in that The adjusting nut is a butterfly nut.

7. The chain tensioner according to claim 1, characterized in that The second rod segment is perpendicular to the first rod segment and is arranged parallel to the insertion rod.

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