Tension adjustment device for a metal chain

Abstract

The utility model relates to tension adjusting device technical field, concretely is: a kind of tension adjusting device of metal chain, including chain body, the lower portion of chain body is equipped with tension adjusting mechanism, the tension adjusting mechanism includes mounting seat, pivot and adjusting sprocket, the top fixedly connected with fixed frame of mounting seat, pivot is rotatably connected in fixed frame, the outside fixed connection of pivot has connecting plate, adjusting sprocket is rotatably connected in the outside of connecting plate, the outside of pivot is also equipped with torsion spring, the outside of fixed frame is also equipped with secondary adjusting mechanism;In the utility model, tension adjusting mechanism is matched by torsion spring, pivot and adjusting sprocket, can automatically adapt chain tension change, when chain tension is too small, torsion spring elastic force pushes connecting plate and drives adjusting sprocket to tighten chain, increase tension;When tension is too large, chain pulls adjusting sprocket and compresses torsion spring, reduces tension.

Description

Technical Field

[0001] This utility model relates to the field of tension adjustment device technology, and in particular to a tension adjustment device for a metal chain. Background Technology

[0002] In industrial transmission, logistics conveying, and construction machinery, metal chains, with their advantages of high load-bearing capacity and high transmission efficiency, have become core transmission or conveying components, widely used in production line conveyor belts, crane transmission systems, motorcycle chain drives, and other scenarios. During operation, metal chains require appropriate tension. If the tension is too low, the chain may loosen its engagement with the sprocket, leading to tooth skipping and slippage, resulting in transmission inaccuracies or conveying blockages, affecting equipment operating accuracy. Conversely, excessive tension will exacerbate friction and wear between the chain and sprocket, shortening component lifespan, and may even cause chain breakage due to stress concentration, resulting in equipment downtime or safety accidents.

[0003] Traditional tension adjustment devices mostly use a bolt-operated manual adjustment structure. When adjusting, the equipment shell must be disassembled first, and then the position of the adjustment component is changed by turning multiple sets of bolts to adjust the tension. This method is not only cumbersome and time-consuming, but also difficult for operators to operate, especially for large equipment or chains installed in narrow spaces, resulting in extremely low adjustment efficiency. Utility Model Content

[0004] To address the technical problem that traditional tension adjustment devices often employ manual bolt adjustment structures, this utility model provides a tension adjustment device for metal chains.

[0005] The technical solution adopted by this utility model is: a tension adjustment device for a metal chain, including a chain body, a tension adjustment mechanism provided below the chain body, the tension adjustment mechanism including a mounting base, a rotating shaft and an adjusting sprocket, a fixed frame fixedly connected to the top of the mounting base, the rotating shaft rotatably connected in the fixed frame, a connecting plate fixedly connected to the outside of the rotating shaft, the adjusting sprocket rotatably connected to the outside of the connecting plate, a torsion spring sleeved on the outside of the rotating shaft, and a secondary adjustment mechanism provided on the outside of the fixed frame.

[0006] In one embodiment, the two ends of the torsion spring are respectively engaged with the connecting plate and the fixing frame.

[0007] In one embodiment, the secondary adjustment mechanism includes a gear and a rack. The gear is rotatably connected to the outside of the fixed frame. The gear is coaxially and fixedly connected to the rotating shaft. A guide sleeve is fixedly connected to the outside of the fixed frame. A slide plate is slidably connected inside the guide sleeve. A slide rod is fixedly connected to one end of the slide plate. One end of the slide rod passes through the guide sleeve and is fixedly connected to the rack. A tension spring connects the slide plate and the guide sleeve.

[0008] In one embodiment, the slide bar is provided in at least two sets.

[0009] In one embodiment, the exterior of the adjusting sprocket is coated with an anti-stick coating.

[0010] In one embodiment, the guide sleeve is a cuboid cavity structure.

[0011] The beneficial effects of this utility model are as follows: Compared with the prior art, in this utility model, the tension adjustment mechanism, through the cooperation of torsion spring, rotating shaft and adjusting sprocket, can automatically adapt to changes in chain tension. When the chain tension is too low, the torsion spring pushes the connecting plate to drive the adjusting sprocket to tighten the chain and increase the tension; when the tension is too high, the chain pulls the adjusting sprocket to compress the torsion spring and reduce the tension. There is no need to manually disassemble the outer shell and tighten the bolts, making the operation convenient and solving the problems of cumbersome and inefficient traditional manual adjustment steps. In addition, the secondary adjustment mechanism can further adjust the chain. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the chain body in this utility model. Figure 1 ;

[0014] Figure 3 yes Figure 2 Enlarged structural diagram of region A in the middle;

[0015] Figure 4 This is a schematic diagram of the chain body in this utility model. Figure 2 ;

[0016] Figure 5 yes Figure 4 A magnified structural diagram of region B in the middle;

[0017] Figure 6 This is a cross-sectional structural diagram of the guide sleeve in this utility model.

[0018] The following are marked in the diagram: 1. Chain body; 2. Mounting base; 3. Fixing frame; 4. Shaft; 5. Torsion spring; 6. Connecting plate; 7. Adjusting sprocket; 8. Gear; 9. Rack; 10. Guide sleeve; 11. Slide rod; 12. Slide plate; 13. Tension spring. Detailed Implementation

[0019] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described below.

[0022] To address the problems existing in the background art, this application proposes the following technical solution: a tension adjusting device for a metal chain, comprising a chain body 1, a tension adjusting mechanism disposed below the chain body 1, the tension adjusting mechanism comprising a mounting base 2, a rotating shaft 4, and an adjusting sprocket 7, a fixing frame 3 fixedly connected to the top of the mounting base 2, the rotating shaft 4 rotatably connected to the fixing frame 3, a connecting plate 6 fixedly connected to the outside of the rotating shaft 4, the adjusting sprocket 7 rotatably connected to the outside of the connecting plate 6, a torsion spring 5 sleeved on the outside of the rotating shaft 4, and a secondary adjusting mechanism disposed on the outside of the fixing frame 3. The two ends of the torsion spring 5 are respectively engaged with the connecting plate 6 and the fixing frame 3.

[0023] In this embodiment, the tension adjustment mechanism below the chain body 1 can respond to changes in chain tension in real time, preventing the chain from slipping or skipping teeth due to excessive tension, or from experiencing accelerated wear or breakage due to excessive tension, thus ensuring the stable operation of the chain drive system. The mounting base 2 provides a stable mounting foundation for the entire adjustment device, and can be flexibly fixed according to the chain installation position to adapt to the chain adjustment needs of different equipment, improving the versatility of the device.

[0024] The rotating shaft 4, rotatably connected to the fixed frame 3, provides rotational support for the connecting plate 6. The connecting plate 6 drives the adjusting sprocket 7 to rotate according to the chain tension, realizing dynamic tension adjustment. The adjusting sprocket 7 meshes with the chain body 1 and rotates synchronously during chain operation, reducing friction and wear between the two and extending the service life of the chain and the adjusting sprocket 7. The torsion spring 5 outside the rotating shaft 4 stores and releases elastic force through its own elastic deformation. When the chain tension is too loose, the torsion spring 5 pushes the connecting plate 6 to rotate, causing the adjusting sprocket 7 to lift the chain upward and increase the chain tension. When the chain tension is too tight, the chain pulls the adjusting sprocket 7, causing the connecting plate 6 to compress the torsion spring 5, relieving the chain tension. This achieves automatic and real-time tension adjustment without frequent manual intervention, solving the problems of manual operation and delayed response in traditional tension adjustment.

[0025] In this embodiment, the two ends of the torsion spring 5 are respectively snapped into the connecting plate 6 and the fixing frame 3. The connection method is firm and easy to disassemble and replace. If the elasticity of the torsion spring 5 weakens or is damaged, it can be quickly replaced to restore the adjustment function, reducing maintenance costs and difficulties. The secondary adjustment mechanism outside the fixing frame 3 can further finely adjust the tension based on the adjustment of the torsion spring 5, meet the higher requirements for chain tension accuracy under different working conditions, and improve the applicability of the adjustment device.

[0026] In this embodiment, the secondary adjustment mechanism includes a gear 8 and a rack 9. The gear 8 is rotatably connected to the outside of the fixed frame 3, and the gear 8 is coaxially and fixedly connected to the rotating shaft 4. A guide sleeve 10 is fixedly connected to the outside of the fixed frame 3, and a sliding plate 12 is slidably connected inside the guide sleeve 10. A sliding rod 11 is fixedly connected to one end of the sliding plate 12, and one end of the sliding rod 11 passes through the guide sleeve 10 and is fixedly connected to the rack 9. A tension spring 13 connects the sliding plate 12 and the guide sleeve 10. At least two sets of sliding rods are provided. The outer surface of the adjusting sprocket 7 is coated with an anti-stick coating. The guide sleeve 10 has a rectangular hollow structure.

[0027] The secondary adjustment mechanism's gear 8 meshes with the rack 9, and gear 8 is coaxially fixed with the rotating shaft 4. When the rack 9 moves, it drives gear 8 to rotate, which in turn drives the rotating shaft 4 to rotate, adjusting the initial position of the connecting plate 6 and the adjusting sprocket 7, thus achieving fine adjustment of the chain's basic tension. Compared to single adjustment relying solely on the torsion spring 5, the secondary adjustment can preset the tension benchmark according to the equipment's operating requirements, adapting to the chain tension requirements under different loads and speeds, improving adjustment accuracy, and solving the problem that traditional adjustment devices cannot accurately set the initial tension.

[0028] The guide sleeve 10 on the fixed frame 3 provides stable guidance for the sliding plate 12. The cuboid cavity structure prevents the sliding plate 12 from shifting or rotating during sliding, ensuring that the slide rod 11 drives the rack 9 to move smoothly, thereby ensuring the stability of the gear 8's rotation and avoiding the impact of component misalignment on adjustment accuracy. The tension spring 13 between the sliding plate 12 and the guide sleeve 10 can reset and buffer the sliding plate 12 after adjustment, preventing the sliding plate 12 from shifting due to equipment vibration, ensuring stable meshing between the rack 9 and the gear 8, maintaining the state after tension adjustment, and avoiding repeated tension fluctuations.

[0029] At least two sets of sliding rods further enhance the stability of the sliding plate 12, distribute the force, prevent the sliding plate 12 from tilting due to force on one side, and extend the service life of the components. The anti-stick coating on the outside of the adjusting sprocket 7 prevents oil and impurities from adhering to the surface of the adjusting sprocket 7 during chain operation, maintains the smooth engagement between the adjusting sprocket 7 and the chain, reduces frictional resistance, and facilitates cleaning and maintenance, preventing the accumulation of impurities from affecting the adjustment effect, thus solving the problems of traditional adjusting sprockets 7 being prone to dirt accumulation and requiring frequent maintenance.

[0030] The usage method of this embodiment is as follows:

[0031] Fix the mounting base 2 to the designated position on the equipment below the chain body 1, ensuring that the fixing bracket 3 is stable and that the adjusting sprocket 7 can precisely mesh with the chain body 1; check the installation status of the torsion spring 5, ensuring that its two ends are reliably engaged with the connecting plate 6 and the fixing bracket 3 respectively, without loosening or deformation; according to the initial tension requirements of the chain drive system, start the secondary adjustment mechanism: push or pull the slide plate 12, so that the slide plate 12 slides along the guide sleeve 10, the slide rod 11 drives the rack 9 to move, the rack 9 meshes with the drive gear 8 to rotate, the gear 8 drives the rotating shaft 4 and the connecting plate 6 to rotate, adjust the initial height of the adjusting sprocket 7 until the chain tension reaches the preset benchmark value, after releasing the slide plate 12, the tension spring 13 pulls the slide plate 12 to reset and maintains the stable meshing of the rack 9 and the gear 8, completing the initial tension setting.

[0032] When the equipment is running, if the chain tension is too loose, the torsion spring 5 releases its elastic force to push the connecting plate 6 to rotate around the shaft 4, and the adjusting sprocket 7 lifts the chain upward to increase the chain tension until the tension is restored to a suitable range. If the chain tension is too tight due to factors such as increased load or thermal expansion and contraction, the chain pulls the adjusting sprocket 7 downward, which drives the connecting plate 6 to compress the torsion spring 5. The torsion spring 5 stores its elastic force to relieve the chain tension, thus achieving real-time automatic tension adjustment without manual intervention.

[0033] When equipment operating conditions (such as load and speed) change, the tension spring 13, when the rack 9 moves, drives the gear 8 to rotate, which in turn drives the rotating shaft 4 to rotate, adjusting the initial position of the connecting plate 6 and the adjusting sprocket 7, thus achieving fine adjustment of the chain's basic tension. Compared to single adjustment relying solely on the torsion spring 5, secondary adjustment can preset the tension benchmark according to the equipment's operating requirements, adapting to the chain tension requirements under different loads and speeds, improving adjustment accuracy, and solving the problem that traditional adjustment devices cannot accurately set the initial tension.

[0034] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A tension adjusting device for a metal chain, comprising a chain body (1), characterized in that, The chain body (1) is provided with a tension adjustment mechanism below it. The tension adjustment mechanism includes a mounting base (2), a rotating shaft (4) and an adjusting sprocket (7). A fixed frame (3) is fixedly connected to the top of the mounting base (2). The rotating shaft (4) is rotatably connected in the fixed frame (3). A connecting plate (6) is fixedly connected to the outside of the rotating shaft (4). The adjusting sprocket (7) is rotatably connected to the outside of the connecting plate (6). A torsion spring (5) is also sleeved on the outside of the rotating shaft (4). A secondary adjustment mechanism is also provided on the outside of the fixed frame (3).

2. The tension adjusting device for a metal chain according to claim 1, characterized in that, The two ends of the torsion spring (5) are respectively engaged with the connecting plate (6) and the fixing frame (3).

3. The tension adjusting device for a metal chain according to claim 2, characterized in that, The secondary adjustment mechanism includes a gear (8) and a rack (9). The gear (8) is rotatably connected to the outside of the fixed frame (3). The gear (8) is coaxially fixedly connected to the rotating shaft (4). The guide sleeve (10) is fixedly connected to the outside of the fixed frame (3). A slide plate (12) is slidably connected inside the guide sleeve (10). A slide rod (11) is fixedly connected to one end of the slide plate (12). One end of the slide rod (11) passes through the guide sleeve (10) and is fixedly connected to the rack (9). A tension spring (13) is connected between the slide plate (12) and the guide sleeve (10).

4. The tension adjusting device for a metal chain according to claim 3, characterized in that, The slide bar (11) has at least two sets.

5. The tension adjusting device for a metal chain according to claim 1, characterized in that, The outer surface of the adjusting sprocket (7) is coated with an anti-stick coating.

6. The tension adjusting device for a metal chain according to claim 3, characterized in that, The guide sleeve (10) has a rectangular cavity structure.

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