Chain transmission mechanism with automatic tensioning function

Abstract

The utility model discloses an automatic tensioning chain transmission mechanism which comprises an installation box, an automatic tensioning unit and a chain wheel installation unit. The mounting box is a rectangular box body; the automatic tensioning unit comprises a mounting sliding groove, a mounting sliding rod, a square sliding block, a damper, a spring and an annular sleeve seat. The automatic tensioning device is provided with a reliable automatic tensioning unit, under the action of the left spring, the square sliding block can always have a trend of sliding rightwards, so that the chain disc can tightly support and straighten a hung chain, the damper can buffer force transmitted by external vibration, the situation that the shaking amplitude of the chain is too large due to the external vibration is prevented, and the service life of the chain is prolonged. The position of the chain plate can be fixed as required; the chain wheel fixing device is further provided with the reliable chain wheel mounting unit, the fixing block and the chuck jointly complete clamping and fixing of the chain disc, the chain disc can be fixed by screwing the fixing block, and the chain disc can be replaced by screwing off the fixing block.

Description

Technical Field

[0001] This utility model relates to the field of chain drive technology, specifically to an automatic tensioning chain drive mechanism. Background Technology

[0002] Chain drives consist of a driving sprocket mounted on a parallel shaft, a driven sprocket, and a chain wound around the sprocket. During operation, the meshing of chain links with the sprocket teeth drives the driven sprocket to rotate, transmitting motion and power. As a reliable and efficient transmission method, chain drives are widely used in mechanical equipment.

[0003] In existing chain drive mechanisms, the distance between the two end sprockets will shrink slightly after long-term operation, causing the chain to sag and become untensioned, which reduces transmission efficiency and brings the risk of chain drop. Utility Model Content

[0004] The technical problem this invention aims to solve is to overcome existing defects and provide an automatic tensioning chain drive mechanism. This mechanism features a reliable automatic tensioning unit. Under the action of a left-side spring, the square slider always has a tendency to slide to the right, thus enabling the chain disc to taut and straighten the suspended chain. The damper buffers the force transmitted by external vibrations, preventing excessive chain sway. The chain disc's position can also be fixed as needed. Furthermore, it has a reliable sprocket mounting unit. A fixing block and a chuck together clamp and fix the chain disc. The chain disc can be fixed by tightening the fixing block, or it can be unscrewed to replace the chain disc, effectively solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic tensioning chain drive mechanism, comprising a mounting box, an automatic tensioning unit, and a sprocket mounting unit;

[0006] The mounting box is a rectangular box with a square base fixedly connected to the lower end;

[0007] The automatic tensioning unit includes a mounting groove, a mounting rod, a square slider, dampers, springs, and annular sleeves. The front end of the mounting box has a transverse mounting groove. A transverse mounting rod is fixedly connected inside the mounting groove. The square slider is slidably connected inside the mounting groove. The mounting rod passes through the middle of the side of the square slider and maintains a sliding connection with it. Four dampers are installed on the left side inside the mounting groove. The four dampers are arranged in a circular array outside the mounting rod. The dampers are arranged transversely, and their two ends are fixedly connected to the left side of the mounting groove and the left side of the square slider, respectively. Four annular sleeves are fixedly connected to the left side of both the mounting groove and the square slider. A spring is fitted on the outside of each damper, and the end of the spring is locked inside the annular sleeve.

[0008] The sprocket mounting unit is installed on the front side of the square slider.

[0009] The base is used to install and fix the mounting box, which is used to install various units and components of this mechanism. The sprocket mounting unit facilitates the installation and replacement of sprockets. The mounting groove is used to install the sliding rod and the square slider. The square mounting groove, in conjunction with the mounting rod, allows the square slider to slide smoothly. The square slider drives the chain disc mounted on the front to adjust its position. Under the action of the spring on the left, the square slider always has a tendency to slide to the right, so that the chain disc can keep the suspended chain taut and straight. The damper can buffer the force transmitted by external vibrations and prevent the chain from swaying too much due to external vibrations. The ring sleeve is used to limit the end of the spring, so that the spring can work stably.

[0010] Furthermore, the automatic tensioning unit also includes threaded rods and tightening blocks. The rear side of the mounting box has a through groove that connects to the mounting slide. Two threaded rods are fixedly connected to the rear side of the square slider. The threaded rods extend from the inside of the through groove and are threadedly connected to a tightening block at their ends. The tightening block is screwed and fixed to the rear side of the mounting box. The threaded rods can move with the square slider. When it is necessary to fix the position of the chain drive, tightening the tightening block can fix the square slider, thereby fixing the position of the chain drive.

[0011] Furthermore, the sprocket mounting unit includes a mounting base, a bearing, a rotating shaft, and a chuck. The front end of the square slider is fixedly connected to the mounting base, and the bearing is fixedly installed inside the mounting base. The rotating shaft is arranged longitudinally, and its rear end is fixedly connected to the inside of the bearing. A chuck is fixedly connected to the front position of the rotating shaft. The mounting base is used for mounting the bearing, which allows the rotating shaft to rotate flexibly. The chuck is used for mounting the sprocket and provides a limiting and locking effect on the sprocket from the back.

[0012] Furthermore, the sprocket mounting unit also includes a chain disc and a pin. The chain disc is fitted onto the front end of the shaft, and a chuck supports the rear side of the chain disc. The front end is fixedly connected to a pin, which engages in a slot on the inner ring side of the chain disc. The chain disc is used for mounting the chain, and the pin, by engaging with the inside of the chain disc, ensures the stability of the transmission between the shaft and the chain disc.

[0013] Furthermore, the sprocket mounting unit also includes an end shaft and a fixing block. The end shaft is fixedly connected to the front end of the rotating shaft, and the outer side of the end shaft is threaded. The fixing block is threadedly connected to the end shaft, and the sprocket is mounted and fixed to the front side of the chuck via the fixing block. The end shaft is used for mounting the fixing block. By tightening the fixing block, the sprocket can be fixed. The fixing block and the chuck together complete the clamping and fixing of the sprocket.

[0014] Furthermore, it also includes fixed feet. Each of the four corners of the upper end of the base has a groove, and the lower end of the groove is a fixed foot integrally connected to the base. The fixed foot has vertical bolt through holes inside. The fixed feet are used for installing bolt fasteners, thereby fixing the mechanism to an external mounting surface or frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. It has a reliable automatic tensioning unit. The square mounting groove and mounting rod can make the square slider slide smoothly, driving the chain plate installed on the front to adjust its position. Under the action of the spring on the left, the square slider can always have a tendency to slide to the right, so that the chain plate can tighten and straighten the hanging chain. The damper can buffer the force transmitted by external vibration and prevent the chain from shaking too much due to external vibration. The position of the chain plate can also be fixed as needed.

[0017] 2. It has a reliable sprocket mounting unit. The shaft is used for inserting the chain disc. The chuck from the back provides a limiting and locking effect on the chain disc. The pin is inserted into the chain disc to ensure the stability of the transmission effect between the shaft and the chain disc. The chain disc can be fixed by tightening the fixing block. The fixing block and the chuck together complete the clamping and fixing of the chain disc.

[0018] 3. This utility model has a reliable automatic tensioning unit. Under the action of the left spring, the square slider can always have a tendency to slide to the right, so that the chain can tighten and straighten the hanging chain. The damper can buffer the force transmitted by external vibration and prevent the chain from shaking too much due to external vibration. The position of the chain can also be fixed as needed. It also has a reliable sprocket mounting unit. The fixing block and the chuck work together to clamp and fix the chain. The chain can be fixed by tightening the fixing block, or the chain can be replaced by unscrewing the fixing block. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the oblique front structure of this utility model;

[0021] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the rear structure of this utility model.

[0023] In the diagram: 1. Mounting box, 2. Base, 3. Automatic tensioning unit, 31. Mounting slide, 32. Mounting slide bar, 33. Square slider, 34. Damper, 35. Spring, 36. Annular sleeve, 37. Threaded rod, 38. Tightening block, 4. Sprocket mounting unit, 41. Mounting seat, 42. Bearing, 43. Shaft, 44. Chuck, 45. Chain disc, 46. End shaft, 47. Fixing block, 48. Pin block, 5. Fixing foot. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4 This embodiment provides a technical solution: an automatic tensioning chain drive mechanism, including a mounting box 1, an automatic tensioning unit 3, and a sprocket mounting unit 4; the mounting box 1 is a rectangular box, and a square base 2 is fixedly connected to the lower end.

[0026] The automatic tensioning unit 3 includes a mounting groove 31, a mounting rod 32, a square slider 33, a damper 34, a spring 35, and an annular sleeve 36. The front end of the mounting box 1 has a horizontal mounting groove 31. The horizontal mounting rod 32 is fixedly connected inside the mounting groove 31. The square slider 33 is slidably connected inside the mounting groove 31. The mounting rod 32 passes through the middle of the side of the square slider 33 and maintains a sliding connection with the square slider 33. Four dampers 34 are installed on the left side inside the mounting groove 31. The four dampers 34 are arranged in a circular array outside the mounting rod 32. The dampers 34 are arranged horizontally, and their two ends are fixedly connected to the left side of the mounting groove 31 and the left side of the square slider 33, respectively. Four annular sleeves 36 are fixedly connected to the left side of the mounting groove 31 and the left side of the square slider 33. A spring 35 is sleeved on the outside of each damper 34, and the end of the spring 35 is locked inside the annular sleeve 36.

[0027] The sprocket mounting unit 4 is installed on the front side of the square slider 33.

[0028] The base 2 is used to install and fix the mounting box 1. The mounting box 1 is used to install various units and components of this mechanism. The sprocket mounting unit 4 can facilitate the installation and replacement of the sprocket. The mounting groove 31 is used to install the sliding rod 32 and the square slider 33. The square mounting groove 31, together with the mounting rod 32, enables the square slider 33 to slide smoothly. The square slider 33 drives the chain disc 45 installed on the front side to adjust its position. Under the action of the left spring 35, the square slider 33 can always have a tendency to slide to the right, so that the chain disc 45 can tighten and straighten the hanging chain. The damper 34 can buffer the force transmitted by external vibration and prevent the chain from shaking too much due to external vibration. The ring sleeve 36 is used to limit the end of the spring 35, so that the spring 35 can work stably.

[0029] The automatic tensioning unit 3 also includes threaded rods 37 and tightening blocks 38. A through groove is provided on the rear side of the mounting box 1 to connect with the mounting slide 31. Two threaded rods 37 are fixedly connected to the rear side of the square slider 33. The threaded rods 37 extend from the inside of the through groove and are threadedly connected to a tightening block 38 at their ends. The tightening block 38 is tightened and fixed to the rear side of the mounting box 1. The threaded rods 37 can move with the square slider 33. When it is necessary to fix the position of the chain disc 45, the square slider 33 can be fixed by tightening the tightening block 38, thereby fixing the position of the chain disc 45.

[0030] The sprocket mounting unit 4 includes a mounting base 41, a bearing 42, a rotating shaft 43, and a chuck 44. The front end of the square slider 33 is fixedly connected to the mounting base 41, and the bearing 42 is fixedly mounted inside the mounting base 41. The rotating shaft 43 is arranged longitudinally, and its rear end is fixedly connected inside the bearing 42. The chuck 44 is fixedly connected to the front position of the rotating shaft 43. The mounting base 41 is used for mounting the bearing 42, which allows the rotating shaft 43 to rotate flexibly. The chuck 44 is used for mounting the sprocket 45 and provides a limiting and locking effect on the sprocket 45 from the back.

[0031] The sprocket mounting unit 4 includes a chain disc 45 and a pin 48. The chain disc 45 is fitted onto the front end of the shaft 43, and a chuck 44 supports the rear side of the chain disc 45. The front end of the chain disc 45 is fixedly connected to the pin 48, which is engaged in a slot on the inner ring side of the chain disc 45. The chain disc 45 is used for chain mounting, and the pin 48, by engaging with the inside of the chain disc 45, ensures the stability of the transmission between the shaft 43 and the chain disc 45.

[0032] The sprocket mounting unit 4 also includes an end shaft 46 and a fixing block 47. The end shaft 46 is fixedly connected to the front end of the rotating shaft 43. The outer side of the end shaft 46 is threaded. The fixing block 47 is threadedly connected to the end shaft 46. The sprocket 45 is mounted and fixed to the front side of the chuck 44 via the fixing block 47. The end shaft 46 is used for mounting the fixing block 47. By tightening the fixing block 47, the sprocket 45 can be fixed. The fixing block 47 and the chuck 44 together complete the clamping and fixing of the sprocket 45.

[0033] The system also includes fixed feet 5. A groove is provided at each of the four corners of the upper end of the base 2. The lower end of the groove is the fixed foot 5, which is integrally connected to the base 2. Vertical bolt holes are provided inside the fixed feet 5. The fixed feet 5 are used for installing bolt fasteners, thereby fixing the mechanism to an external mounting surface or frame.

[0034] The working principle of this utility model is as follows:

[0035] This mechanism features a reliable automatic tensioning unit 3. A mounting groove 31 is used to mount the sliding rod 32 and the square slider 33. The square mounting groove 31, in conjunction with the sliding rod 32, allows the square slider 33 to slide smoothly. The square slider 33 drives the front-mounted chain disc 45 to adjust its position. Under the action of the left-side spring 35, the square slider 33 always has a tendency to slide to the right, thus allowing the chain disc 45 to taut and straighten the suspended chain. The damper 34 buffers the force transmitted by external vibrations, preventing excessive chain sway. The annular sleeve 36 limits the end of the spring 35, ensuring stable operation. The threaded rod 37 moves with the square slider 33. When the position of the chain disc 45 needs to be fixed, tightening the tightening block 38 fixes the square slider 33, thereby fixing the position of the chain disc 45. This mechanism also features a reliable sprocket mounting unit 4. Mounting base 41 is used for mounting bearing 42, which allows shaft 43 to rotate flexibly. Chuck 44 is used for mounting chain disc 45, providing a limiting and locking effect from the back. Chain disc 45 is used for chain mounting. Pin 48 is engaged with chain disc 45 to ensure stable transmission between shaft 43 and chain disc 45. End shaft 46 is used for mounting fixing block 47. By tightening fixing block 47, chain disc 45 can be fixed. Fixing block 47 and chuck 44 together complete the clamping and fixing of chain disc 45. Furthermore, fixing feet 5 are used for mounting bolts and fasteners, thereby fixing the mechanism to an external mounting surface or frame.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An automatically tensioned chain drive mechanism, characterized in that: It includes a mounting box (1), an automatic tensioning unit (3), and a sprocket mounting unit (4); The mounting box (1) is a rectangular box, and a square base (2) is fixedly connected to the lower end; The automatic tensioning unit (3) includes a mounting groove (31), a mounting rod (32), a square slider (33), a damper (34), a spring (35), and an annular sleeve (36). The front end of the mounting box (1) has a transverse mounting groove (31). A transverse mounting rod (32) is fixedly connected inside the mounting groove (31). The square slider (33) is slidably connected inside the mounting groove (31). The mounting rod (32) passes through the middle of the side of the square slider (33) and maintains a sliding connection with it. Four dampers (34) are installed on the left side of the inner side of the mounting groove (31). The four dampers (34) are arranged in a circular array on the outside of the mounting rod (32). The dampers (34) are arranged laterally, and their two ends are fixedly connected to the left side of the mounting groove (31) and the left side of the square slider (33), respectively. Four annular sleeves (36) are fixedly connected to the left side of the mounting groove (31) and the square slider (33). A spring (35) is sleeved on the outside of each damper (34), and the end of the spring (35) is locked inside the annular sleeve (36). The sprocket mounting unit (4) is mounted on the front side of the square slider (33).

2. The automatically tensioned chain drive mechanism according to claim 1, characterized in that: The automatic tensioning unit (3) also includes a threaded rod (37) and a tightening block (38). The rear side of the mounting box (1) is provided with a through groove that connects to the mounting slide (31). The rear side of the square slider (33) is fixedly connected with two threaded rods (37) on the left and right. The threaded rod (37) extends out from the inside of the through groove and is threadedly connected to a tightening block (38) at its end. The tightening block (38) is tightened and fixed to the rear side of the mounting box (1).

3. The automatically tensioned chain drive mechanism according to claim 1, characterized in that: The sprocket mounting unit (4) includes a mounting base (41), a bearing (42), a rotating shaft (43), and a chuck (44). The front end of the square slider (33) is fixedly connected to the mounting base (41), and the bearing (42) is installed and fixed inside the mounting base (41). The rotating shaft (43) is arranged longitudinally and its rear end is fixedly connected to the inside of the bearing (42). The chuck (44) is fixedly connected to the front position of the rotating shaft (43).

4. The automatically tensioned chain drive mechanism according to claim 3, characterized in that: The sprocket mounting unit (4) also includes a chain disc (45) and a pin block (48). The chain disc (45) is sleeved on the front end of the rotating shaft (43), and the chuck (44) supports the rear side of the chain disc (45). The front end is fixedly connected to the pin block (48), which is engaged in a slot opened on the inner ring side of the chain disc (45).

5. The automatically tensioned chain drive mechanism according to claim 3, characterized in that: The sprocket mounting unit (4) also includes an end shaft (46) and a fixing block (47). The front end of the rotating shaft (43) is fixedly connected to the end shaft (46). The end shaft (46) is threaded on the outside. The fixing block (47) is threadedly connected to the end shaft (46). The sprocket (45) is mounted and fixed on the front side of the chuck (44) through the fixing block (47).

6. The automatically tensioned chain drive mechanism according to claim 1, characterized in that: It also includes a fixed foot (5), and a groove is provided at each of the four corners of the upper end of the base (2). The lower end of the groove is a fixed foot (5) integrally connected to the base (2). The fixed foot (5) has a vertical bolt through hole inside.

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