Automatic reset mechanism for frictional chain

Abstract

The utility model discloses a kind of friction type chain automatic recovery reset mechanism, it is related to chain type turning over positioner technical field, including spline shaft, the spline shaft is fixedly connected in the sprocket shaft one end of the sprocket of chain type turning over positioner both sides upright column upper end guide sprocket, deep groove ball bearing is sleeved on the spline shaft, and sprocket is fixedly connected with the outer ring of deep groove ball bearing, the spline shaft is located the position of the both sides of deep groove ball bearing and is all sleeved with baffle sleeve, two baffle sleeves opposite side are all fixedly connected with protruding part, the utility model is in cooperation with counterweight chain etc. by friction sprocket, real-time offset the dynamic mass difference of inside and outside chain when lifting column is lifted, make overturning chain always orderly arrangement, avoid stacking jam in upright column inside, eliminate equipment abnormal stop and workpiece damage risk.

Description

Technical Field

[0001] This utility model relates to the technical field of chain-type turning and positioning machines, specifically a friction-type chain automatic recycling and reset mechanism. Background Technology

[0002] In the fields of heavy machinery manufacturing, pressure vessel production, and large steel structure processing, workpieces are often characterized by their large weight and irregular dimensions. The processing, assembly, or inspection of such workpieces requires frequent 90° rotations, 180° flips, or multi-angle tilts. The stability, accuracy, and efficiency of these rotations directly affect production quality and cycle time.

[0003] Chain-type turning and positioning machines are commonly used auxiliary equipment in the construction machinery industry for turning and changing the angle of workpieces. Due to their simple mechanical structure, low manufacturing cost, and convenient operation, they are frequently used in workshop production processes. When the chain positioner is unloaded or lifting, the chain in the column is longer than the chain suspended on the outside, causing the chain to automatically fall back into the column. Currently, the chain-type turning and positioning machines used in the industry fall into two categories: one where the chain is not retracted and is manually or by components pressed back to its original position; and another where the chain is reset by its own weight. During use, problems often arise such as chain jamming due to the inability to reset, leading to damage to the drive motor or hydraulic cylinder, resulting in certain shortcomings in application. To overcome these problems, we provide a friction-type automatic chain retraction and reset mechanism. Utility Model Content

[0004] The purpose of this invention is to provide a friction-type chain automatic recycling and reset mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A friction-type automatic retraction and reset mechanism for a chain includes a splined shaft, which is fixedly connected to one end of the sprocket shaft of the guide sprocket on the upper end of the columns on both sides of a chain-type turning and positioning machine. A deep groove ball bearing is sleeved on the splined shaft, and a friction sprocket is fixedly connected to the outer ring of the deep groove ball bearing. A retaining sleeve is sleeved on both sides of the splined shaft at the position of the deep groove ball bearing, and a protrusion is fixedly connected to the opposite side of the two retaining sleeves. The protrusion is fixed to the side of the outer ring of the deep groove ball bearing. A friction component is provided on the splined shaft for applying frictional force to the friction sprocket. A reset component that cooperates with the friction sprocket is provided on the columns on both sides of the chain-type turning and positioning machine.

[0006] As a further embodiment of this utility model: the friction assembly includes a sealing plate, which is fixedly connected to both sides of the friction sprocket. Several stacked friction plates are provided inside the friction sprocket between the sealing plate and the retaining sleeve. A limiting sleeve is fitted at the end of the spline shaft near the sprocket shaft, and the end of the limiting sleeve away from the sprocket shaft abuts against the adjacent friction plate. A retaining ring is fitted at the end of the spline shaft away from the sprocket shaft, and the end of the retaining ring near the sprocket shaft abuts against the adjacent friction plate. An adjustment assembly for friction force is provided at the end of the spline shaft.

[0007] As a further improvement of this utility model: each of the friction plates has a spline groove inside that matches the spline shaft, and the spline groove is slidably connected to the spline shaft.

[0008] As a further embodiment of this utility model: the adjusting component includes a threaded column, which is fixedly connected to the end of the spline shaft away from the sprocket shaft, a butterfly spring is sleeved on the threaded column, and a round nut is threadedly connected to the threaded column.

[0009] As a further embodiment of this utility model: the reset component includes a connecting seat, which is fixedly connected to one side of the upper end of the column of the chain-type turning and positioning machine. A chain is fixedly connected to the connecting seat, which passes around the friction sprocket and meshes with the friction sprocket. A counterweight component is provided at the end of the chain away from the connecting seat.

[0010] As a further improvement of this utility model: the upper end of the column of the chain-type turning and positioning machine is rotatably connected to a limit wheel near the connecting seat, and the limit wheel is used to limit the chain.

[0011] As a further embodiment of this utility model: the counterweight assembly includes a counterweight block, which is fixedly connected to the end of the chain away from the connecting seat.

[0012] As a further improvement of this utility model, the counterweight is composed of several overlapping counterweight plates, which are fixed together by long bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes the synergistic action of friction sprockets and counterweight chains to offset the dynamic mass difference between the inner and outer chains during the lifting of the column, ensuring the orderly arrangement of the rotating chains and preventing jamming due to stacking on the inner side of the column. This eliminates the risk of abnormal equipment shutdown and workpiece damage. The friction mechanism adapts to force balance requirements. When the column rises, the hydraulic cylinder force overcomes the counterweight and friction, allowing the chain to release freely. When the column descends, the counterweight force drives the chain to automatically retract. No additional power is required throughout the process, eliminating jamming and impact, and reducing component wear. The overlapping design of multiple inner and outer friction plates disperses the force on individual friction plates, preventing overload wear and significantly extending lifespan compared to traditional single friction plates. It also reduces the failure rate of the mechanism and the frequency of friction plate replacement, lowering maintenance costs. Furthermore, the friction force can be adjusted by tightening a round nut to compress a disc spring, eliminating the need to disassemble complex components. This design adapts to the lifting and lowering force requirements of workpieces of different weights and facilitates dynamic adjustment after wear, reducing the difficulty of switching operating conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure when the present invention is applied.

[0015] Figure 2 This is a schematic diagram of the counterweight component of this utility model.

[0016] Figure 3 This is a partial structural schematic diagram of the present invention.

[0017] Figure 4 This is an enlarged structural schematic diagram of the counterweight component in this utility model.

[0018] Figure 5 This is a partial cross-sectional view of the structure of this utility model.

[0019] Figure 6 This is a schematic diagram of the spline shaft in this utility model.

[0020] The components include: 1. Chain-type turning and positioning machine; 2. Spline groove; 3. Chain; 4. Guide sprocket; 5. Sprocket shaft; 6. Connecting seat; 7. Counterweight; 8. Limit wheel; 9. Spline shaft; 10. Limit sleeve; 11. Friction sprocket; 12. Deep groove ball bearing; 13. Retaining ring; 14. Threaded column; 15. Round nut; 16. Disc spring; 17. Friction plate; 18. Sealing plate; 19. Retaining sleeve. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-5 In this embodiment of the present invention, a friction-type chain automatic recycling and reset mechanism includes a spline shaft 9. The spline shaft 9 is fixedly connected to one end of the sprocket shaft 5 of the guide sprocket 4 on both sides of the column of the chain-type turning and positioning machine 1. A deep groove ball bearing 12 is sleeved on the spline shaft 9. A friction sprocket 11 is fixedly connected to the outer ring of the deep groove ball bearing 12. A retaining sleeve 19 is sleeved on both sides of the spline shaft 9 at the position of the deep groove ball bearing 12. A protrusion is fixedly connected to the opposite side of the two retaining sleeves 19. The protrusion is fixed to the side of the outer ring of the deep groove ball bearing 12. A friction component for applying friction force to the friction sprocket 11 is provided on the spline shaft 9. When the lifting column of the chain-type tilting positioner 1 rises under the lifting force of the hydraulic cylinder, the tilting chain needs to be released outward synchronously with the column. At this time, the force of the hydraulic cylinder lifting the column is greater than the weight of the counterweight and the friction force applied to the friction sprocket 11 by the friction component. The tilting chain drives the friction sprocket 11 to rotate clockwise or in the corresponding release direction, so that the tilting chain can be released as it rises, avoiding the chain from being pulled and deformed due to untimely release. When the lifting column falls under the gravity or the reverse force of the hydraulic cylinder, the tilting chain needs to be retracted to the inside of the positioner to avoid stacking. At this time, the weight of the counterweight chain is greater than the friction force of the friction component and the weight of the chain inside the column. The counterweight pulls the friction sprocket 11 to rotate counterclockwise or in the corresponding retraction direction through the chain. The friction sprocket 11 drives the tilting chain to retract to the inside. At the same time, the friction force applied by the friction component can buffer the retraction speed and avoid the chain retraction being too fast and stacking collision due to excessive counterweight weight.

[0023] Please see Figure 5 and Figure 6The friction assembly includes a sealing plate 18, which is fixedly connected to both sides of the friction sprocket 11. Inside the friction sprocket 11, between the sealing plate 18 and the retaining sleeve 19, several stacked friction plates 17 are arranged. A limiting sleeve 10 is fitted onto the end of the spline shaft 9 near the sprocket shaft 5, and the end of the limiting sleeve 10 away from the sprocket shaft 5 abuts against the adjacent friction plate 17. A retaining ring 13 is fitted onto the end of the spline shaft 9 away from the sprocket shaft 5, and the end of the retaining ring 13 near the sprocket shaft 5 abuts against the adjacent friction plate 17. Each friction plate 17 has a spline groove 2 inside that matches the spline shaft 9. The shaft 9 is slidably connected; through the radial positioning of the sealing plate 18 and the retaining sleeve 19, and the axial limiting of the limiting sleeve 10 and the retaining ring 13, it is ensured that the friction plate 17 always cooperates with the friction sprocket 11 and the spline shaft 9, avoiding friction fluctuations caused by friction plate misalignment. The spline groove 2 of the friction plate 17 and the sliding structure of the spline shaft 9 allow the friction plate to move adaptively with pressure adjustment. With the multi-plate stacking design, the friction force can be linearly adjusted by changing the pressure, adapting to the friction requirements of different working conditions when the column is raised and lowered. The multiple friction plates 17 disperse the force and bidirectional limiting avoid collision wear, greatly reducing the failure rate of the friction components and providing a guarantee for long-term stable operation.

[0024] Please see Figure 5 The spline shaft 9 has a friction adjustment component at its end. The adjustment component includes a threaded post 14, which is fixedly connected to the end of the spline shaft 9 away from the sprocket shaft 5. A butterfly spring 16 is sleeved on the threaded post 14, and a round nut 15 is threaded onto the threaded post 14. During operation, when it is necessary to increase the friction force, the round nut 15 is rotated to move it along the threaded post 14 toward the butterfly spring 16, compressing the butterfly spring 16 to increase the pressure on the friction plate 17, thereby increasing the friction force between the friction plates and between the friction plate and the friction sprocket 11. When it is necessary to decrease the friction force, the round nut 15 is rotated to release the compression of the butterfly spring 16. After the pressure decreases, the friction force decreases accordingly. Through the simple operation of the round nut 15, the friction force can be flexibly adjusted. The elastic compensation function of the butterfly spring 16 can automatically offset the wear of the friction plate 17, avoid friction force attenuation after long-term use, ensure that the chain winding and unwinding rhythm is always consistent, and prevent chain stacking or release jamming caused by friction force fluctuations. Please see Figures 2-4The chain-type turning and positioning machine 1 has reset components on its two side columns that cooperate with friction sprockets 11. The reset components include connecting seats 6, which are fixedly connected to one side of the upper end of the chain-type turning and positioning machine 1 column. A chain 3 is fixedly connected to the connecting seat 6. The chain 3 passes around the friction sprocket 11 and meshes with it. A counterweight component is provided at the end of the chain 3 away from the connecting seat 6. Limiting wheels 8 are rotatably connected to the upper end of the chain-type turning and positioning machine 1 column near the connecting seat 6. The limiting wheels 8 are used to limit the chain 3. The counterweight component includes a counterweight block 7, which is fixedly connected to the end of the chain 3 away from the connecting seat 6. The chain 3, through meshing with the friction sprocket 11 and in conjunction with the gravity of the counterweight block 7, offsets the dynamic mass difference between the inner and outer turning chains when the chain-type turning and positioning machine 1 column rises and falls in real time, fundamentally preventing the turning chains from stacking inside the column and eliminating the risk of jamming.

[0025] Please see Figure 4 The counterweight block 7 is composed of several overlapping counterweight plates, which are fixed together by long bolts. The long bolts can fasten several independent counterweight plates into a whole, preventing the counterweight plates from separating or misaligning during the lifting and lowering of the column. The long bolt fixing only requires tightening or loosening the bolts to add or remove counterweight plates, which is convenient to operate, greatly reduces the difficulty of counterweight adjustment when switching working conditions, and improves the efficiency of equipment operation and maintenance.

[0026] The working principle of this utility model is as follows: the friction force is adjusted by turning the round nut 15 on the threaded column 14 at the end of the spline shaft 9. The round nut 15 moves to compress or release the disc spring 16. The spring force is transmitted to the stacked friction plates 17 through the retaining ring 13. The friction plates 17 are in contact with the friction sprocket 11 under the limit sleeve 10 and the sealing plate 18. When the column of the chain-type turning and positioning machine 1 rises, the lifting force of the hydraulic cylinder is greater than the weight of the counterweight 7 and the friction force. The turning chain drives the friction sprocket 11 to rotate clockwise. The chain 3 pulls the counterweight 7 to rise. The limit wheel 8 limits the chain 3, so that the turning chain can be raised and lowered at the same time. When the column falls, the weight of the counterweight 7 is greater than the friction force and the weight of the inner chain. The counterweight 7 pulls down the chain 3 to drive the friction sprocket 11 to rotate counterclockwise. The turning chain is pulled back. The friction force buffers the recovery speed. The disc spring 16 can also compensate for the wear of the friction plates 17 to maintain the stability of the friction force. The dynamic quality difference between the inner and outer chains is offset throughout the process, and the chain stacking jams is avoided.

[0027] It should also be noted that the chain-type turning and positioning machine 1 is a conventional device in this field, and its working principle and structural composition are well known to those skilled in the art, so they will not be described in detail here.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Although this specification describes embodiments, not every embodiment contains only one technical solution. This method of description is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A friction-type automatic chain retraction and reset mechanism, comprising a splined shaft (9), characterized in that: The spline shaft (9) is fixedly connected to one end of the sprocket shaft (5) of the guide sprocket (4) on the upper end of the column of the chain-type turning and positioning machine (1). A deep groove ball bearing (12) is sleeved on the spline shaft (9). A friction sprocket (11) is fixedly connected to the outer ring of the deep groove ball bearing (12). A retaining sleeve (19) is sleeved on both sides of the spline shaft (9) located on the deep groove ball bearing (12). A protrusion is fixedly connected to the opposite side of the two retaining sleeves (19). The protrusion is fixed to the side of the outer ring of the deep groove ball bearing (12). A friction assembly for applying friction force to the friction sprocket (11) is provided on the spline shaft (9). A reset assembly that cooperates with the friction sprocket (11) is provided on the column of the chain-type turning and positioning machine (1).

2. The friction-type chain automatic recycling and reset mechanism according to claim 1, characterized in that, The friction assembly includes a sealing plate (18), which is fixedly connected to both sides of the friction sprocket (11). Inside the friction sprocket (11), between the sealing plate (18) and the retaining sleeve (19), there are several stacked friction plates (17). The end of the spline shaft (9) near the sprocket shaft (5) is fitted with a limiting sleeve (10). The end of the limiting sleeve (10) away from the sprocket shaft (5) abuts against the adjacent friction plate (17). The end of the spline shaft (9) away from the sprocket shaft (5) is fitted with a retaining ring (13). The end of the retaining ring (13) near the sprocket shaft (5) abuts against the adjacent friction plate (17). The end of the spline shaft (9) is provided with a friction force adjustment assembly.

3. The friction-type chain automatic recycling and reset mechanism according to claim 2, characterized in that, The friction plate (17) is provided with a spline groove (2) that matches the spline shaft (9), and the spline groove (2) is slidably connected to the spline shaft (9).

4. The friction-type chain automatic recycling and reset mechanism according to claim 2, characterized in that, The adjustment assembly includes a threaded post (14), which is fixedly connected to the end of the spline shaft (9) away from the sprocket shaft (5). A butterfly spring (16) is sleeved on the threaded post (14), and a round nut (15) is threaded onto the threaded post (14).

5. The friction-type chain automatic recycling and reset mechanism according to claim 1, characterized in that, The reset assembly includes a connecting seat (6), which is fixedly connected to one side of the upper end of the column of the chain-type turning and positioning machine (1). A chain (3) is fixedly connected to the connecting seat (6). The chain (3) passes around the friction sprocket (11) and meshes with the friction sprocket (11). A counterweight assembly is provided at the end of the chain (3) away from the connecting seat (6).

6. The friction-type chain automatic recycling and reset mechanism according to claim 5, characterized in that, The upper end of the column of the chain-type turning and positioning machine (1) is connected to a limit wheel (8) near the connecting seat (6). The limit wheel (8) is used to limit the chain (3).

7. The friction-type chain automatic recycling and reset mechanism according to claim 5, characterized in that, The counterweight assembly includes a counterweight block (7), which is fixedly connected to the end of the chain (3) away from the connecting seat (6).

8. The friction-type chain automatic recycling and reset mechanism according to claim 7, characterized in that, The counterweight (7) is composed of several overlapping counterweight pieces, which are fixed together by long bolts.

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