Chain tensioner

Abstract

The utility model discloses a chain tensioning device, include: the matching welding frame, install the mounting plate on the top of matching welding frame, the top of mounting plate is fixedly connected with first support and locating hole disc, be provided with the pivot on first support, the handle is fixedly covered with outside pivot, be equipped with a plurality of first locating hole of circumferential array distribution on locating hole disc, be equipped with the second locating hole of using cooperation with first locating hole on handle, the head of handle is rotatably provided with the sprocket that engages with chain, the tail of handle is fixedly connected with labor -saving handle subassembly. The utility model discloses a sprocket around pivot revolution realizes to the extrusion of chain, and then plays the role of adjusting chain tensioning, utilizes the lever principle to drive sprocket around pivot revolution, plays the role of saving the labor, adopts a plurality of first locating hole and realizes multistage adjustment, adapts to a variety of tensioning environment, has simple structure, low in production cost, and the advantages such as saving the labor.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts technology, specifically to a chain tensioning device. Background Technology

[0002] The running trajectory of the chain system is constantly changing during operation. On the one hand, it is due to the impact vibration caused by the polygonal effect of the chain system, load changes and speed fluctuations. On the other hand, the wear and elongation generated during the service of the chain is particularly evident on the slack side of the chain system. Excessive fluctuations in the running trajectory of the chain system or insufficient chain tension may cause abnormal chain vibration, tooth skipping and other risks.

[0003] Therefore, in actual use, excessive slack in the chain will cause vibration or even derailment during chain transmission, affecting the normal operation of the equipment, resulting in equipment downtime for maintenance and consequently economic losses. Utility Model Content

[0004] The purpose of this invention is to provide a chain tensioning device to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chain tensioning device, comprising: a welding frame, an mounting plate mounted on the top of the welding frame, a first support and a positioning hole plate fixedly connected to the top of the mounting plate, a rotating shaft rotatably mounted on the first support, a handle fixedly sleeved on the rotating shaft, a plurality of first positioning holes arranged in a circumferential array on the positioning hole plate, a second positioning hole for cooperating with the first positioning holes on the handle, a sprocket for meshing with the chain rotatably mounted on the head of the handle, and a force-saving handle assembly fixedly connected to the tail of the handle.

[0006] Furthermore, the effort-saving handle assembly includes a sleeve, which is slidably disposed on the tail of the handle. The tail of the handle has two first locking holes, and the sleeve has a second locking hole that cooperates with the first locking holes.

[0007] Furthermore, the two first locking holes form a set of positioning points, and multiple sets of positioning points are provided on the tail of the handle.

[0008] Furthermore, a second support is fixedly connected to the top of the mounting plate, the rotating shaft is rotatably mounted on the second support, and a torsion spring is sleeved on the rotating shaft, the torsion spring being located between the first support and the second support.

[0009] Furthermore, the first support has a first insertion hole, and the second support has a second insertion hole. One end of the torsion spring is inserted into the first insertion hole, and the other end of the torsion spring is inserted into the second insertion hole.

[0010] Furthermore, a third support is fixedly connected to the top of the mounting plate. The third support is located on the other side of the handle away from the first support. The rotating shaft is connected to the first support, the second support, and the third support through bearings.

[0011] Furthermore, a round rod is fixedly connected to the head of the positioning hole plate, and a sprocket is connected to the outer side of the round rod through a bearing.

[0012] In the above technical solution, the chain tensioning device provided by this utility model has the following beneficial effects: This invention uses a sprocket to rotate around a pivot to compress the chain, thereby adjusting the chain tension. It utilizes the lever principle to drive the sprocket to rotate around the pivot, which saves effort. Multiple first positioning holes are used to achieve multi-level adjustment, adapting to various tension environments. It has the advantages of simple structure, low production cost, and labor saving.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0014] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A structural schematic diagram provided for an embodiment of this utility model; Figure 2 A schematic diagram of the unfolded structure of the effort-saving handle assembly provided in this embodiment of the utility model; Figure 3 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure after installation provided for an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Welding frame; 2. Mounting plate; 21. First support; 211. First insertion hole; 22. Second support; 221. Second insertion hole; 23. Rotating shaft; 25. Third support; 3. Positioning hole plate; 31. First positioning hole; 4. Handle; 41. Second positioning hole; 42. First locking hole; 5. Sleeve; 51. Second locking hole; 6. Sprocket; 7. Round rod; 8. End cap; 9. Torsion spring; 10. Chain. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0019] Please see Figures 1-4 A chain tensioning device includes: a welding frame 1, an mounting plate 2 mounted on the top of the welding frame 1, a first support 21 and a positioning hole plate 3 fixedly connected to the top of the mounting plate 2, a rotating shaft 23 rotatably mounted on the first support 21, a handle 4 fixedly sleeved on the outside of the rotating shaft 23, a plurality of first positioning holes 31 distributed in a circumferential array on the positioning hole plate 3, a second positioning hole 41 that cooperates with the first positioning holes 31 on the handle 4, a sprocket 6 that meshes with the chain 10 rotatably mounted on the head of the handle 4, and a force-saving handle assembly fixedly connected to the tail of the handle 4.

[0020] For details, please refer to Figure 4 A tensioning device is installed on both sides of the chain 10. By rotating the shaft 23, the sprocket 6 revolves around the shaft 23, thereby squeezing the chain 10 and adjusting the tension of the chain 10. When the shaft 23 is rotated, the head of the handle 4 rotates synchronously with the shaft 23. After the bolt passes through the second positioning hole 41 and the corresponding first positioning hole 31, it is locked, so that the position of the sprocket 6 is fixed, thereby completing the adjustment of the tension of the chain 10 by the sprocket 6.

[0021] This invention uses a sprocket 6 to revolve around a shaft 23 to compress the chain 10, thereby adjusting the tension of the chain 10. It utilizes the lever principle to drive the sprocket 6 to revolve around the shaft 23, which saves effort. Multiple first positioning holes 31 are used to achieve multi-level adjustment, adapting to various tension environments. It has the advantages of simple structure, low production cost, and labor saving.

[0022] Furthermore, the labor-saving handle assembly includes a sleeve 5, which is slidably disposed on the tail of the handle 4. Two first locking holes 42 are provided on the tail of the handle 4, and a second locking hole 51 is provided on the sleeve 5 to cooperate with the first locking holes 42. The two first locking holes 42 form a set of positioning points, and multiple sets of positioning points are provided on the tail of the handle 4.

[0023] Specifically, by changing the position of the sleeve 5 on the tail of the handle 4, the length of the rotating handle formed by the sleeve 5 and the tail of the handle 4 is changed, thereby adapting to the tensioning needs of the chain 10 under different loads; the second locking hole 51 and the first locking hole 42 are connected by a detachable bolt connection.

[0024] Furthermore, a second support 22 is fixedly connected to the top of the mounting plate 2, and a rotating shaft 23 is rotatably mounted on the second support 22. A torsion spring 9 is sleeved on the rotating shaft 23. The torsion spring 9 is located between the first support 21 and the second support 22. A first insertion hole 211 is provided on the first support 21, and a second insertion hole 221 is provided on the second support 22. One end of the torsion spring 9 is inserted into the first insertion hole 211, and the other end of the torsion spring 9 is inserted into the second insertion hole 221. A third support 25 is fixedly connected to the top of the mounting plate 2. The third support 25 is located on the other side of the handle 4 away from the first support 21. The rotating shaft 23 is connected to the first support 21, the second support 22, and the third support 25 through bearings.

[0025] Specifically, the rotating shaft 23 is rotatably mounted on the first support 21, the second support 22, and the third support 25. The support at these three points makes the rotating shaft 23 particularly stable when rotating. By adding the torsion spring 9, the torque force of the torsion spring 9 gives the rotating shaft 23 a clockwise rotation tendency. During installation, the sprocket 6 will have an initial force that squeezes the chain 10, making the feel of rotating the shaft 23 when holding the sleeve 5 better. At the same time, when adapting to the chain 10 with large fluctuations, the torque force of the torsion spring 9 can be completely relied upon as the source of tension for the chain 10. The second positioning hole 41 and the first positioning hole 31 are not locked with bolts, achieving elastic tension.

[0026] Furthermore, a round rod 7 is fixedly connected to the head of the positioning hole plate 3. The outer side of the round rod 7 is connected to the sprocket 6 through a bearing, so that the sprocket 6 can rotate relative to the handle 4. An end cap 8 is threadedly connected to the outer side of the round rod 7, and the end cap 8 is located on the outer side of the sprocket 6.

[0027] In this utility model, reference Figure 1 system Figure 3First, install the welding bracket 1 on one side of the chain 10. Rotate the sleeve 5 counterclockwise. Then, align the sprocket 6 with the outside of the chain 10 so that the sprocket 6 engages with the chain 10. Loosen the sleeve 5. Under the torque force of the torsion spring 9, the sprocket 6 presses against the chain 10. Then, adjust the length of the sleeve 5 that slides out of the end of the handle 4. Push the sleeve 5 clockwise so that the sprocket 6 further compresses the chain 10 until the chain 10 is taut. Finally, pass the bolt through the second positioning hole 41 and the corresponding first positioning hole 31 and lock it.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A chain tensioner comprising: The welding frame (1) is characterized in that: a mounting plate (2) is installed on the top of the welding frame (1), a first support (21) and a positioning hole plate (3) are fixedly connected on the top of the mounting plate (2), a rotating shaft (23) is rotatably provided on the first support (21), a handle (4) is fixedly sleeved on the rotating shaft (23), a plurality of first positioning holes (31) are provided on the positioning hole plate (3), a second positioning hole (41) is provided on the handle (4) to cooperate with the first positioning hole (31), a sprocket (6) that meshes with the chain (10) is rotatably provided on the head of the handle (4), and a force-saving handle assembly is fixedly connected to the tail of the handle (4).

2. A chain tensioner as defined in claim 1, wherein The labor-saving handle assembly includes a sleeve (5), which is slidably disposed on the tail of the handle (4). The tail of the handle (4) has two first locking holes (42), and the sleeve (5) has a second locking hole (51) that cooperates with the first locking holes (42).

3. A chain tensioner as defined in claim 2, wherein The two first locking holes (42) form a set of positioning points, and multiple sets of positioning points are provided on the tail of the handle (4).

4. A chain tensioner as defined in claim 1, wherein A second support (22) is fixedly connected to the top of the mounting plate (2). The rotating shaft (23) is rotatably mounted on the second support (22). A torsion spring (9) is sleeved on the rotating shaft (23). The torsion spring (9) is located between the first support (21) and the second support (22).

5. A chain tensioner as defined in claim 4, wherein The first support (21) has a first insertion hole (211), and the second support (22) has a second insertion hole (221). One end of the torsion spring (9) is inserted into the first insertion hole (211), and the other end of the torsion spring (9) is inserted into the second insertion hole (221).

6. A chain tensioning device according to claim 5, characterized in that, A third support (25) is fixedly connected to the top of the mounting plate (2). The third support (25) is located on the other side of the handle (4) away from the first support (21). The rotating shaft (23) is connected to the first support (21), the second support (22), and the third support (25) through bearings.

7. A chain tensioner as defined in claim 1, wherein A round rod (7) is fixedly connected to the head of the positioning hole plate (3), and a sprocket (6) is connected to the outside of the round rod (7) through a bearing.

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