Chain tongs capable of adjusting bearing clearance

Abstract

On a clip body, a first bearing is correspondingly arranged on the top side of a wear-resisting plate, a second bearing and a third bearing are correspondingly arranged on one side of the plate surface of the wear-resisting plate, and a fourth bearing and a fifth bearing are correspondingly arranged on the other side of the plate surface of the wear-resisting plate; the bearing on at least one side of the wear-resisting plate is connected to the clamp body through an eccentric shaft, the eccentric shaft comprises a bearing connecting part and a clamp body connecting part, and a first center line of the bearing connecting part is arranged in a bias manner towards one side relative to a second center line of the clamp body connecting part. According to the utility model, the bearing on at least one side of the wear-resisting plate is connected to the tongs body through the eccentric shaft, and the bearing clearance can be adjusted by rotating the eccentric shaft, so that the bearing clearance is matched with the actual thickness of the wear-resisting plate; inclination of the chain clip caused by a gap between the bearing and the wear-resisting plate or damage of the bearing and the wear-resisting plate caused by sliding friction generated by over-contact of the bearing and the wear-resisting plate are avoided, the service life of the bearing and the wear-resisting plate is prolonged, and the running reliability of the chain clip is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of thin film production technology, and in particular to a chain clip with adjustable bearing clearance. Background Technology

[0002] Chain clamps are key components in film production lines. During film stretching, chain clamps are fixed to the chain to clamp the two sides of the film, ensuring that the film is subjected to uniform force when stretched in the lateral and longitudinal directions.

[0003] In conventional rolling bearing chain clips, the clearance between the bearings used to hold the wear-resistant plates is fixed and cannot be adjusted. When the chain clip is installed on its guide rail mounting base, if the thickness of the wear-resistant plate changes due to factors such as thermal expansion during processing, installation, or use, it may cause the bearing and the wear-resistant plate to be suspended or in excessive contact, resulting in sliding friction. This can lead to damage to the bearing and the wear-resistant plate, reduce their service life, and affect the stability of the chain clip operation. Utility Model Content

[0004] In response to the shortcomings of existing chain clips, the applicant provides a chain clip with a reasonable structure and adjustable bearing clearance. The bearing clearance can be adjusted according to the change in the thickness of the wear-resistant plate, avoiding situations of suspension or over-contact, preventing damage to the bearings and wear-resistant plates, extending service life, and ensuring the stability of chain clip operation.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A chain clip with adjustable bearing clearance has a first bearing disposed on the top side of a wear-resistant plate, a second and a third bearing disposed on one side of the wear-resistant plate, and a fourth and a fifth bearing disposed on the other side of the wear-resistant plate. At least one bearing on the wear-resistant plate is connected to the chain clip via an eccentric shaft. The eccentric shaft includes a bearing connection part and a chain clip connection part. The first center line of the bearing connection part is offset to one side relative to the second center line of the chain clip connection part.

[0007] As a further improvement to the above technical solution:

[0008] The second and third bearings are connected by an eccentric shaft, and the fourth and fifth bearings are connected by a concentric shaft; or the second, third, fourth and fifth bearings are all connected by an eccentric shaft.

[0009] The first bearing is connected by a concentric shaft.

[0010] The outer diameter of the bearing connection of the eccentric shaft is larger than the outer diameter of the clamp body connection.

[0011] An annular groove is provided on the upper part of the clamping body connecting part of the eccentric shaft.

[0012] Several convex surfaces are provided on the upper clamp body and on the surface that engages with and clamps the clamp handle.

[0013] The first bearing is set vertically, while the second, third, fourth, and fifth bearings are set horizontally.

[0014] The second and third bearings are arranged horizontally, spaced back to back, while the fourth and fifth bearings are arranged vertically, spaced up and down.

[0015] The clamp body includes an upper clamp body and a lower clamp body, which are fixedly connected. The first bearing, the second bearing, and the third bearing are mounted on the upper clamp body, and the fourth bearing and the fifth bearing are mounted on the lower clamp body.

[0016] A clamp handle is provided on the upper clamp body, and a chain link is provided on the lower clamp body.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention connects the bearing on at least one side of the wear-resistant plate to the clip body using an eccentric shaft. The bearing clearance can be adjusted by rotating the eccentric shaft to match the actual thickness of the wear-resistant plate. This avoids the chain clip tilting caused by a gap between the bearing and the wear-resistant plate, or damage to the bearing and wear-resistant plate due to excessive contact and sliding friction. This extends the service life of the bearing and the wear-resistant plate and ensures the reliability of the chain clip operation. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention.

[0020] Figure 2 This is a cross-sectional view of the present invention.

[0021] Figure 3 This is a three-dimensional view of the eccentric axis.

[0022] Figure 4 This is the front view of the eccentric axis.

[0023] Figure 5 This is a top view of the bearing arrangement.

[0024] Figure 6 This is a schematic diagram of another embodiment of the upper clip.

[0025] In the diagram: 1. Upper clamping body; 2. Lower clamping body; 3. First bearing; 4. Second bearing; 5. Third bearing; 6. Fourth bearing; 7. Fifth bearing; 8. Concentric shaft; 9. Eccentric shaft; 91. Bearing connection; 911. First center line; 92. Clamping body connection; 921. Second center line; 93. Ring groove; 10. Clamping handle; 11. Chain link; 12. Chain link shaft core; 13. Wear-resistant plate; 14. Convex surface. Detailed Implementation

[0026] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0027] like Figure 1 , Figure 2 As shown, this utility model provides a chain clip with adjustable bearing clearance. The chain clip body includes an upper clip body 1 and a lower clip body 2, which are fixedly connected by fasteners. The clip handle 10 is disposed on the upper clip body 1, and the chain link 11 is connected to the lower clip body 2 through the chain link shaft core 12.

[0028] The upper clamping body 1 is equipped with a first bearing 3, a second bearing 4, and a third bearing 5, while the lower clamping body 2 is equipped with a fourth bearing 6 and a fifth bearing 7. The first bearing 3 is vertically positioned above the top side of the wear-resistant plate 13, abutting against the top surface of the wear-resistant plate 13. The second bearing 4, third bearing 5, fourth bearing 6, and fifth bearing 7 are horizontally positioned, with the second bearing 4 and third bearing 5 arranged horizontally at intervals, and the fourth bearing 6 and fifth bearing 7 arranged vertically at intervals. The second bearing 4 and third bearing 5 are positioned on the same side of the wear-resistant plate 13, abutting against the side of the wear-resistant plate 13 from one side, while the fourth bearing 6 and fifth bearing 7 are positioned on the opposite side of the wear-resistant plate 13, abutting against the opposite side of the wear-resistant plate 13 from the other side.

[0029] In this embodiment, the first bearing 3, the fourth bearing 6 and the fifth bearing 7 are respectively connected to the clamp body via a concentric shaft 8, and the second bearing 4 and the third bearing 5 are respectively connected to the clamp body via an eccentric shaft 9.

[0030] like Figure 3 , Figure 4 As shown, the eccentric shaft 9 includes a bearing connection portion 91 and a clamp body connection portion 92. The outer diameter of the bearing connection portion 91 is larger than the outer diameter of the clamp body connection portion 92. The first center line 911 of the bearing connection portion 91 is offset to one side by a certain distance d relative to the second center line 921 of the clamp body connection portion 92. Figure 5 As shown, since the bearing connection portion 91 of the eccentric shaft 9 is offset relative to the clamp body connection portion 92, after the second bearing 4 and the third bearing 5 are fitted onto the bearing connection portion 91, the distance from each part of the outer circumference of the second bearing 4 / third bearing 5 to the second center line 921 of the clamp body connection portion 92 is different. Some parts have a larger distance, and some parts have a smaller distance. Therefore, when the eccentric shaft 9 rotates around the second center line 921, the distance between the part of the bearing facing the wear-resistant plate 13 and the opposite fourth bearing 6 and fifth bearing 7 will also change with the rotation of the eccentric shaft 9, thereby achieving the adjustment of the bearing clearance. An annular groove 93 is provided on the upper part of the clamp body connection portion 92 of the eccentric shaft 9.

[0031] In this embodiment, the bearing on one side of the wear-resistant plate 13 is connected by an eccentric shaft 9, allowing adjustment of the bearing clearance from one side. In other embodiments, the bearings (fourth bearing 6 and fifth bearing 7) on the other side of the wear-resistant plate 13 can also be connected by an eccentric shaft 9, allowing adjustment of the bearing clearance from both sides.

[0032] like Figure 1 As shown, in this embodiment, the surface of the upper clamping body 1 that engages with the clamping handle 10 to clamp the thin film is a smooth plane. Figure 6 As shown, in other embodiments, a plurality of convex surfaces 14 may also be provided on the upper clamping body 1 and the surface that cooperates with the clamping handle 10 to clamp the film. The plurality of convex surfaces 14 can increase the friction and facilitate the discharge of solvent from the gaps between the convex surfaces 14 after the film is clamped.

[0033] This invention connects the bearing on at least one side of the wear-resistant plate 13 to the clip body using an eccentric shaft 9. The bearing clearance can be adjusted by rotating the eccentric shaft 9 to match the actual thickness of the wear-resistant plate 13. This avoids the chain clip tilting caused by a gap between the bearing and the wear-resistant plate 13, or damage to the bearing and wear-resistant plate 13 due to excessive contact and sliding friction. This extends the service life of the bearing and the wear-resistant plate 13 and ensures the reliability of the chain clip operation.

[0034] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A chain clip with adjustable bearing clearance, characterized in that: On the clamp body, a first bearing (3) is provided on the top side of the wear-resistant plate (13), a second bearing (4) and a third bearing (5) are provided on one side of the wear-resistant plate (13), and a fourth bearing (6) and a fifth bearing (7) are provided on the other side of the wear-resistant plate (13). At least one bearing on the wear-resistant plate (13) is connected to the clamp body via an eccentric shaft (9). The eccentric shaft (9) includes a bearing connection part (91) and a clamp body connection part (92). The first center line (911) of the bearing connection part (91) is offset to one side relative to the second center line (921) of the clamp body connection part (92).

2. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: The second bearing (4) and the third bearing (5) are connected by an eccentric shaft (9), and the fourth bearing (6) and the fifth bearing (7) are connected by a concentric shaft (8); or the second bearing (4), the third bearing (5), the fourth bearing (6) and the fifth bearing (7) are all connected by an eccentric shaft (9).

3. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: The first bearing (3) is connected by a concentric shaft (8).

4. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: The outer diameter of the bearing connection part (91) of the eccentric shaft (9) is larger than the outer diameter of the clamp body connection part (92).

5. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: An annular groove (93) is provided on the upper part of the eccentric shaft (9) clip body connecting part (92).

6. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: Several convex surfaces (14) are provided on the upper clamp body (1) and on the surface that is clamped to the clamp handle (10).

7. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: The first bearing (3) is set vertically, and the second bearing (4), the third bearing (5), the fourth bearing (6), and the fifth bearing (7) are set horizontally.

8. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: The second bearing (4) and the third bearing (5) are arranged horizontally at intervals, while the fourth bearing (6) and the fifth bearing (7) are arranged vertically at intervals.

9. The chain clip with adjustable bearing clearance according to claim 1, characterized in that: The clamp body includes an upper clamp body (1) and a lower clamp body (2), which are fixedly connected. The first bearing (3), the second bearing (4), and the third bearing (5) are set on the upper clamp body (1), and the fourth bearing (6) and the fifth bearing (7) are set on the lower clamp body (2).

10. The chain clip with adjustable bearing clearance according to claim 9, characterized in that: A clamp handle (10) is provided on the upper clamp body (1), and a chain link (11) is provided on the lower clamp body (2).

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