Chain static load pretensioning device

Abstract

The utility model provides a chain static load pretensioning device, and belongs to the technical field of chain machining. The problems that an existing chain pre-tensioning device is high in manufacturing cost and the like are solved. The first clamping device, the polishing wheel assembly and the second clamping device are arranged on the rack and sequentially arranged in the moving direction of a chain, the first clamping device and the second clamping device are used for clamping the chain, the polishing wheel assembly comprises a plurality of guide wheels and a pre-tensioning wheel, the guide wheels are rotationally arranged on the rack, and the pre-tensioning wheel is arranged on the rack. The pre-tensioning wheel is arranged on the machine frame in a sliding mode through a sliding seat, the sliding seat can be driven by a driving mechanism to slide, and the pre-tensioning wheel can be driven by the sliding seat to move in the direction in which the chain is tensioned. The pretension device has the advantages of being capable of providing large pretension force and low in manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of chain processing technology, specifically relating to a chain static load pre-tensioning device. Background Technology

[0002] Chain pre-tensioning is an essential step in chain manufacturing. Chain pre-tensioning has the following effects: 1. Pre-tensioning can change the internal structure of the chain, usually by causing the chain to undergo plastic deformation and then naturally recover, thereby improving the chain's strength and wear resistance. This rearrangement of the internal structure helps reduce chain wear and extend its service life; 2. Pre-tensioning can also correct chain length errors and twists, making its pitch more uniform.

[0003] Existing pretensioning methods generally achieve chain pretensioning by controlling the speed of the sprocket. Speed ​​control requires designing a speed ratio, which is achieved through gears. The greater the pretension, the greater the required speed ratio, especially for plate chains, which require a large pretension. To achieve a high speed ratio, the gears need to be made very large, resulting in high manufacturing costs. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned deficiencies in existing chain pretensioning devices by providing a chain static load pretensioning device that can provide a large pretension force and has a low manufacturing cost.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A chain static load pretensioning device includes a frame and a first clamping device, a light wheel assembly, and a second clamping device arranged sequentially on the frame along the chain movement direction. The first and second clamping devices are used to clamp the chain. The light wheel assembly includes a plurality of guide wheels and a pretensioning wheel. The guide wheels are rotatably mounted on the frame, and the pretensioning wheel is slidably mounted on the frame via a slide block. The slide block can slide under the drive of a driving mechanism, and the pretensioning wheel can move in the direction of tightening the chain under the drive of the slide block.

[0007] In the above-mentioned chain static load pre-tensioning device, both the guide wheel and the pre-tensioning wheel are provided with a groove for chain embedding.

[0008] In the above-mentioned chain static load pretensioning device, both the first clamping device and the second clamping device include a fixed clamping plate, a movable clamping plate, and a clamping drive for moving the movable clamping plate. The fixed clamping plate and the movable clamping plate are respectively disposed on both sides of the chain. The fixed clamping plate is fixed on the frame, and the movable clamping plate is slidably disposed on the frame. The movable clamping plate can move closer to or away from the fixed clamping plate under the drive of the clamping drive.

[0009] In the above-mentioned chain static load pre-tensioning device, the fixed clamp and the movable clamp are provided with mating parts on their opposite sides that match the outline shape of the chain, and the mating parts can be inserted into the chain.

[0010] In the above-mentioned chain static load pretensioning device, the movable clamp is slidably mounted on the frame via a sliding plate. The sliding plate is also provided with a release element. The release element and the fixed clamp are located on the same side of the chain. As the release element moves away from the fixed clamp as the sliding plate moves away from the fixed clamp, it can contact the chain and disengage the chain from the mating part of the fixed clamp.

[0011] In the above-mentioned chain static load pretensioning device, the slide plate is provided with two release members, which are respectively located at both ends of the fixed clamping plate and are fixed to the slide plate by connecting rods.

[0012] In the above-mentioned chain static load pre-tensioning device, the release element is a roller, which is rotatably mounted on the connecting rod.

[0013] In the above-mentioned chain static load pretensioning device, the clamping drive is a hydraulic cylinder.

[0014] In the above-mentioned chain static load pretensioning device, the drive mechanism can only drive the slide to move unidirectionally in the direction of tightening the chain. The frame is also provided with a tensioning mechanism, which enables the slide to move bidirectionally in the direction of tightening or loosening the chain.

[0015] In the above-mentioned chain static load pretensioning device, the driving mechanism is a hydraulic cylinder, and the piston rod of the driving mechanism can push the slide block to move in the chain tensioning direction during the extension process. The tensioning mechanism is a pneumatic cylinder.

[0016] In the aforementioned chain static load pretensioning device, the moving direction of the movable clamp is perpendicular to the projection of the moving direction of the slide on the horizontal plane.

[0017] In the above-mentioned chain static load pre-tensioning device, the guide wheel includes a first guide wheel, a second guide wheel, a third guide wheel, and a fourth guide wheel. The first guide wheel, the second guide wheel, the pre-tensioning wheel, the third guide wheel, and the fourth guide wheel are arranged sequentially along the moving direction of the chain. The second guide wheel and the third guide wheel are symmetrically arranged on both sides of the center moving path of the pre-tensioning wheel. The first guide wheel and the fourth guide wheel are symmetrically arranged on both sides of the center moving path of the pre-tensioning wheel. The second guide wheel, the pre-tensioning wheel, and the first guide wheel are arranged sequentially along the extension direction of the piston rod of the drive mechanism.

[0018] In the above-mentioned chain static load pretensioning device, an input sprocket and an output sprocket are rotatably mounted on the frame. Both the input sprocket and the output sprocket rotate under the drive of a motor. The input sprocket, the first clamping device, the optical wheel assembly, the second clamping device, and the output sprocket are arranged sequentially along the moving direction of the chain.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] 1. A large pre-tension force is provided through the drive mechanism (hydraulic cylinder) to achieve a reliable pre-tension effect.

[0021] 2. The structure is simple and does not require gears to achieve the transmission ratio for pre-tensioning, which greatly reduces manufacturing costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a top view of the present invention;

[0024] Figure 3 This is a bottom view of the present invention.

[0025] In the diagram, 1 is the frame; 2 is the input sprocket; 3 is the output sprocket; 4 is the fixed clamping plate; 5 is the movable clamping plate; 6 is the clamping drive; 7 is the sliding plate; 8 is the mating part; 9 is the release element; 10 is the connecting rod; 11 is the pre-tensioning wheel; 12 is the slide; 13 is the drive mechanism; 14 is the tensioning mechanism; 15 is the first guide wheel; 16 is the second guide wheel; 17 is the third guide wheel; and 18 is the fourth guide wheel. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] like Figure 1-3 As shown, the present invention provides a chain static load pretensioning device, including a frame 1 and an input sprocket 2, a first clamping device, a light wheel assembly, a second clamping device, and an output sprocket 3 arranged sequentially on the frame 1 along the moving direction of the chain. The input sprocket 2 and the output sprocket 3 are both engaged with the chain, and both the input sprocket 2 and the output sprocket 3 are rotatably mounted on the frame 1. Both the input sprocket 2 and the output sprocket 3 rotate under the drive of a motor.

[0028] The first clamping device and the second clamping device are used to clamp the chain. Both the first clamping device and the second clamping device include a fixed clamping plate 4, a movable clamping plate 5, and a clamping drive 6 for driving the movable clamping plate 5 to move. The fixed clamping plate 4 and the movable clamping plate 5 are respectively located on both sides of the chain. The fixed clamping plate 4 is fixed on the frame 1, and the movable clamping plate 5 is fixed on a sliding plate 7. The sliding plate 7 is slidably mounted on the frame 1 via a guide rail. Under the drive of the clamping drive 6, the sliding plate 7 can drive the movable clamping plate 5 to move closer to or away from the fixed clamping plate 4, thereby realizing the clamping and loosening of the chain. The clamping drive 6 is a hydraulic cylinder. The fixed clamping plate 4 and the movable clamping plate 5 are provided with mating parts 8 that match the outline shape of the chain on their opposite sides. The mating parts 8 can be inserted into the chain.

[0029] The slide plate 7 is also provided with two deflectors 9. The deflectors 9 are fixed to the slide plate 7 by the connecting rod 10. The deflectors 9 are rollers, which are rotatably mounted on the connecting rod 10. The deflectors 9 and the fixed clamp 4 are located on the same side of the chain. The two deflectors 9 are located at both ends of the fixed clamp 4. As the deflectors 9 move away from the fixed clamp 4 with the slide plate 7, they can contact the chain and disengage the chain from the mating part 8 of the fixed clamp 4.

[0030] The guide wheel assembly includes four guide wheels and a pre-tensioning wheel 11. The guide wheels are rotatably mounted on the frame 1. The pre-tensioning wheel 11 is mounted on the frame 1 via a slide block 12. The slide block 12 is slidably mounted on the frame 1 via a guide rail. The pre-tensioning wheel 11 is rotatably mounted on the slide block 12. The slide block 12 can slide under the drive of a drive mechanism 13. The pre-tensioning wheel 11 can move in the direction of tightening the chain under the drive of the slide block 12. The drive mechanism 13 can only drive the slide block 12 to move unidirectionally in the direction of tightening the chain. The drive mechanism 13 is a hydraulic cylinder. The piston rod of the drive mechanism 13 is not connected to the slide block 12. Therefore, the piston rod of the drive mechanism 13 can move in a unidirectional direction. When the slide 12 moves independently, the piston rod of the drive mechanism 13 extends and pushes the slide 12 in the direction of chain tension. The moving direction of the movable clamp 5 is perpendicular to the projection of the moving direction of the slide 12 on the horizontal plane. The frame 1 is also provided with a tensioning mechanism 14, which causes the slide 12 to move bidirectionally in the direction of chain tensioning or relaxation. The tensioning mechanism 14 is a cylinder, the piston rod of the cylinder is fixedly connected to the frame 1, and the cylinder body is fixedly connected to the slide 12. The extension and retraction direction of the piston rod of the tensioning mechanism 14 is parallel to the extension and retraction direction of the piston rod of the drive mechanism 13. The force of the tensioning mechanism 14 is much smaller than the force of the drive mechanism 13.

[0031] Both the guide wheel and the pre-tensioning wheel 11 are provided with a smooth groove for the chain to be inserted.

[0032] The guide wheels include a first guide wheel 15, a second guide wheel 16, a third guide wheel 17, and a fourth guide wheel 18. The first guide wheel 15, the second guide wheel 16, the pre-tension wheel 11, the third guide wheel 17, and the fourth guide wheel 18 are arranged sequentially along the movement direction of the chain. The second guide wheel 16 and the third guide wheel 17 are symmetrically arranged on both sides of the center movement path of the pre-tension wheel 11, and the first guide wheel 15 and the fourth guide wheel 18 are symmetrically arranged on both sides of the center movement path of the pre-tension wheel 11. The second guide wheel 16, the pre-tension wheel 11, and the first guide wheel 15 are arranged sequentially along the extension direction of the piston rod of the drive mechanism 13.

[0033] The chain is sequentially wound around each guide wheel and pre-tension wheel 11. When not in a pre-tensioned state, the input sprocket 2 and output sprocket 3 rotate to transport the chain, and the movable clamp 5 moves away from the fixed clamp 4. The chain is restricted from contacting the fixed clamp 4 by the rollers. At this time, the piston rod of the drive mechanism 13 has no force on the slide 12. The tensioning mechanism 14 moves to control the position of the pre-tension wheel 11 to tension the chain. When pre-tensioning is required, the input sprocket 2 and output sprocket 3 stop rotating, and then the movable clamp 5 moves closer to the fixed clamp 4 to clamp the chain. The first clamping device and the second clamping device clamp both ends of the chain. Then the piston rod of the drive mechanism 13 extends and moves against the slide 12 to perform the pre-tensioning work.

[0034] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A chain static load pre-tensioning device, characterized in that, The device includes a frame (1) and a first clamping device, a light wheel assembly, and a second clamping device arranged sequentially on the frame (1) along the chain movement direction. The first clamping device and the second clamping device are used to clamp the chain. The light wheel assembly includes several guide wheels and a pre-tensioning wheel (11). The guide wheels are rotatably arranged on the frame (1). The pre-tensioning wheel (11) is slidably arranged on the frame (1) through a slide (12). The slide (12) can slide under the drive of a drive mechanism (13). The pre-tensioning wheel (11) can move in the direction of tightening the chain under the drive of the slide (12).

2. The chain static load pre-tensioning device according to claim 1, characterized in that, The guide wheel and the pre-tensioning wheel (11) are each provided with a groove for chain embedding.

3. A chain static load pre-tensioning device according to claim 1 or 2, characterized in that, The first clamping device and the second clamping device both include a fixed clamping plate (4), a movable clamping plate (5), and a clamping drive (6) for moving the movable clamping plate (5). The fixed clamping plate (4) and the movable clamping plate (5) are respectively disposed on both sides of the chain. The fixed clamping plate (4) is fixed on the frame (1), and the movable clamping plate (5) is slidably disposed on the frame (1). The movable clamping plate (5) can move closer to or away from the fixed clamping plate (4) under the drive of the clamping drive (6).

4. A chain static load pre-tensioning device according to claim 3, characterized in that, The fixed clamp (4) and the movable clamp (5) are provided with matching parts (8) on their opposite sides, which are matched with the outline shape of the chain. The matching parts (8) can be inserted into the chain.

5. A chain static load pre-tensioning device according to claim 4, characterized in that, The movable clamp (5) is slidably mounted on the frame (1) via a sliding plate (7). The sliding plate (7) is also provided with a disengaging part (9). The disengaging part (9) and the fixed clamp (4) are located on the same side of the chain. As the disengaging part (9) moves away from the fixed clamp (4) with the sliding plate (7), it can contact the chain and disengage the chain from the mating part (8) of the fixed clamp (4).

6. A chain static load pre-tensioning device according to claim 5, characterized in that, The disengaging component (9) is a roller.

7. A chain static load pre-tensioning device according to claim 1 or 2, characterized in that, The drive mechanism (13) can only drive the slide (12) to move in one direction in the direction of tightening the chain. The frame (1) is also provided with a tensioning mechanism (14), which enables the slide (12) to move in both directions in the direction of tightening or loosening the chain.

8. A chain static load pre-tensioning device according to claim 7, characterized in that, The drive mechanism (13) is a hydraulic cylinder. During the extension of the piston rod of the drive mechanism (13), it can push the slide (12) to move in the direction of chain tensioning. The tensioning mechanism (14) is a pneumatic cylinder.

9. A chain static load pre-tensioning device according to claim 1 or 2, characterized in that, The guide wheels include a first guide wheel (15), a second guide wheel (16), a third guide wheel (17), and a fourth guide wheel (18). The first guide wheel (15), the second guide wheel (16), the pre-tension wheel (11), the third guide wheel (17), and the fourth guide wheel (18) are arranged sequentially along the moving direction of the chain. The second guide wheel (16) and the third guide wheel (17) are symmetrically arranged on both sides of the center moving path of the pre-tension wheel (11). The first guide wheel (15) and the fourth guide wheel (18) are symmetrically arranged on both sides of the center moving path of the pre-tension wheel (11). The second guide wheel (16), the pre-tension wheel (11), and the first guide wheel (15) are arranged sequentially along the extension direction of the piston rod of the drive mechanism (13).

10. A chain static load pre-tensioning device according to claim 1 or 2, characterized in that, The frame (1) is also equipped with an input sprocket (2) and an output sprocket (3). The input sprocket (2) and the output sprocket (3) rotate under the drive of the motor. The input sprocket (2), the first clamping device, the optical wheel assembly, the second clamping device, and the output sprocket (3) are arranged in sequence along the moving direction of the chain.

Images