Cloth tensioning mechanism

Abstract

This utility model discloses a fabric tensioning mechanism, relating to the field of fabric production machinery. It includes a tensioning roller rotatably connected to one end of a swing arm, the other end of which is rotatably connected to a frame. The frame is equipped with a first pushing member and a second pushing member. The first pushing member is rotatably connected to the swing arm, and the second pushing member is connected to the other end of the swing arm. The first and second pushing members push the swing arm to rotate about the frame. This application has the advantage of higher precision during actual adjustment.

Description

Technical Field

[0001] This utility model relates to the field of fabric production machinery, and in particular to a fabric tensioning mechanism. Background Technology

[0002] During fabric production (especially dyeing and coating processes), the fabric needs to be tensioned to form a uniform dye or coating on the surface. Alternatively, during fabric winding or unwinding, tensioning mechanisms are used to control the overall unwinding speed and prevent the fabric from becoming too tight or too loose. Common tensioning mechanisms either use the elasticity of a compressed spring to adaptively compensate for the tension during winding or unwinding. However, this method requires frequent spring pressure calibration and is not suitable for large production lines. Another type of tensioning mechanism uses cylinders or similar devices to adjust the tension during production, adapting to automated production lines. However, cylinder failure can easily cause the entire production line to stop, and the cylinder's stroke is affected by gas compression, leading to instability and inaccurate tension control. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a fabric tensioning mechanism.

[0004] This utility model is achieved by the following technical solution: a fabric tensioning mechanism, including a tensioning roller, the tensioning roller being rotatably connected to one end of a swing arm, the other end of the swing arm being rotatably connected to a frame, the frame being provided with a first pusher and a second pusher, the first pusher being rotatably connected to the other end of the swing arm, the second pusher being connected to the swing arm, the first pusher and the second pusher pushing the swing arm to rotate around the frame.

[0005] The first pushing component includes a rotating shaft and a motor mounted on the frame. A driving sprocket is sleeved on the shaft of the motor, and a driven sprocket is sleeved on the rotating shaft. The driving sprocket and the driven sprocket are driven by a chain.

[0006] The driven sprocket rotates, driving the rotating shaft to rotate. One end of the rotating shaft passes through the other end of the swing arm and is fixed to the other end of the swing arm. When the rotating shaft rotates, the swing arm rotates around the frame.

[0007] The second pushing component includes a transmission component and a cylinder. The transmission component is mounted on the swing arm, and the cylinder is mounted on the frame and connected to the transmission component. When the cylinder extends or retracts, it drives the swing arm to rotate through the transmission component.

[0008] The transmission component includes a transmission base and a rotating sleeve. The transmission base is fixed on the swing arm, one end of the rotating sleeve is rotatably connected to the transmission base, and the other end of the rotating sleeve is for the cylinder shaft to be inserted.

[0009] The cylinder is located at the bottom of the frame and below the swing arm, and the cylinder is rotatably connected to the frame.

[0010] The cylinder is rotatably connected to the frame, and the frame is positioned on one side of the swing arm.

[0011] Compared to existing technologies, this invention utilizes a first pushing component to drive the swing arm to rotate. During the pushing process, a second pushing component simultaneously moves to tension the fabric. The fabric is then wound around the tensioning roller. As the fabric is rolled up, it passes through the tensioning roller sequentially. The height of the tensioning roller varies with the swing arm, thus achieving fabric tension. Furthermore, because the first and second pushing components jointly provide power, the large error inherent in using a single pushing component as the power source is overcome, resulting in more precise tension adjustment.

[0012] Furthermore, the cylinder is located at the bottom of the frame and below the swing arm, and is rotatably connected to the frame. In this state, the pressure exerted on the swing arm after the fabric is tensioned tends to be in the same direction as the force exerted by the swing arm on the cylinder. Therefore, its accuracy is higher during actual adjustment, and the tension of the fabric tends to be more consistent during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the fabric tensioning mechanism in this utility model. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the fabric tensioning mechanism in this utility model. Figure 2 ;

[0015] In the diagram: 1. Frame; 2. Tensioning roller; 3. Swing arm; 4. First pusher; 41. Driven sprocket; 42. Drive sprocket; 43. Chain; 44. Electric motor; 5. Second pusher; 51. Cylinder; 52. Transmission seat; 53. Rotating sleeve; 6. Fabric. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0017] Reference Figure 1-2A fabric tensioning mechanism includes a tensioning roller 2, which is rotatably connected to one end of a swing arm 3. The other end of the swing arm 3 is rotatably connected to a frame 1. The frame 1 is equipped with a first pusher 4 and a second pusher 5. The first pusher 4 is rotatably connected to the other end of the swing arm 3, and the second pusher 5 is connected to the swing arm 3. The first pusher 4 and the second pusher 5 push the swing arm 3 to rotate around the frame 1. The first pusher 4 first drives the swing arm 3 to rotate, and the second pusher 5 moves simultaneously during this process, tensioning the fabric 6. The fabric 6 is wound around the tensioning roller 2. As the fabric 6 is wound up, it passes through the tensioning roller 2 sequentially. The height of the tensioning roller 2 varies with the swing arm 3, thus achieving fabric tension. Furthermore, since the first pusher 4 and the second pusher 5 jointly provide power, the large error caused by a single pusher as the power source is compensated for, resulting in more precise tension adjustment.

[0018] In this embodiment, the preferred implementation is that the first pushing member 4 includes a rotating shaft mounted on the frame 1 and a motor 44. A driving sprocket 42 is sleeved on the shaft of the motor 44, and a driven sprocket 41 is sleeved on the rotating shaft. The driving sprocket 42 and the driven sprocket 41 are driven by a chain 43. The rotation of the driven sprocket 41 drives the rotating shaft to rotate. One end of the rotating shaft passes through the other end of the swing arm 3 and is fixed to the other end of the swing arm 3. When the rotating shaft rotates, the swing arm 3 rotates around the frame 1. Similarly, in this embodiment, the preferred implementation is that the second pushing member 5 is used in conjunction with the first pushing member 4. It includes a transmission component and a cylinder 51. The transmission component is mounted on the swing arm 3, and the cylinder 51 is mounted on the frame 1 and connected to the transmission component. When the cylinder 51 extends or retracts, it drives the swing arm 3 to rotate through the transmission component. When adjustment is needed, the cylinder 51 can be engaged with the chain 43 and sprocket of the first pusher 4. When the cylinder 51 is pushed by the pressure of the fabric 6 tension, the gas inside the cylinder 51 is compressed and locked by the engagement of the chain 43 and the sprocket. That is, when the swing arm 3 shows signs of retraction due to its own weight after being lifted, the teeth on the sprocket can engage the gap of the chain 43, thereby reducing the possibility of the swing arm 3 retracting and making the tension adjustment more precise.

[0019] The transmission component includes a transmission base 52 and a rotating sleeve 53. The transmission base 52 is fixed to the swing arm 3, and one end of the rotating sleeve 53 is rotatably connected to the transmission base 52. The other end of the rotating sleeve 53 is for the shaft of the cylinder 51 to be inserted. Correspondingly, the cylinder 51 needs to be rotatably connected to the frame 1. When the cylinder 51 pushes the swing arm 3, the angle of the cylinder 51 relative to the centerline of the frame 1 will change. The rotational connection of the cylinder body and the cooperation of the rotating sleeve 53 are used to compensate for the displacement difference when the cylinder 51 extends, thereby reducing the possibility of jamming.

[0020] The cylinder 51 in the above scheme has two arrangement methods. One method is that the cylinder 51 is rotatably connected to the frame 1, and the frame 1 is placed on one side of the swing arm 3. In this arrangement, the cylinder 51 is still affected by the weight of the swing arm 3 during the swing process. Furthermore, because the pressure exerted by the fabric 6 is not in the same direction as the weight of the swing arm 3, the stroke is unstable during the lifting state. Although a sprocket and chain 43 are used in conjunction with this application, the tension adjustment accuracy is still relatively poor. Therefore, in this application, to further improve the tension adjustment accuracy, the position of the cylinder 51 can be changed to: the cylinder 51 is located at the bottom of the frame 1 and below the swing arm 3, and the cylinder 51 is rotatably connected to the frame 1. In this state, the pressure of the fabric 6 after tensioning and its reaction force on the swing arm 3 tends to be in the same direction as the force exerted by the swing arm 3 on the cylinder 51. Therefore, the accuracy is higher during actual adjustment, and the tension of the fabric 6 is more consistent during use.

[0021] Compared to existing technologies, this invention utilizes a combination of chain 43 and sprockets to first drive the swing arm 3 to rotate. During this process, the cylinder 51 simultaneously moves, tensioning the fabric 6. The fabric 6 is then wound around the tension roller 2. As the fabric 6 is wound up, it passes through the tension roller 2 sequentially. The height of the tension roller 2 varies with the swing of the swing arm 3, thus achieving fabric tension. Furthermore, because the combination of chain 43 and sprockets, along with the cylinder 51, provides power, it overcomes the large error inherent in using a single driving component, resulting in more precise tension adjustment. Further, the cylinder 51 is located at the bottom of the frame 1 and below the swing arm 3, rotatably connected to the frame 1. In this state, the pressure exerted on the swing arm 3 after the fabric 6 is tensioned tends to be consistent with the direction of the force exerted by the swing arm 3 on the cylinder 51. Therefore, the actual adjustment is more precise, and the tension of the fabric 6 is more consistent during use.

[0022] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A fabric tensioning mechanism, comprising a tensioning roller, the tensioning roller being rotatably connected to one end of a swing arm, and the other end of the swing arm being rotatably connected to a frame, characterized in that: The frame is provided with a first pusher and a second pusher. The first pusher is rotatably connected to the other end of the swing arm, and the second pusher is connected to the swing arm. The first pusher and the second pusher push the swing arm to rotate around the frame.

2. The fabric tensioning mechanism according to claim 1, characterized in that: The first pushing component includes a rotating shaft and a motor mounted on the frame. A driving sprocket is sleeved on the shaft of the motor, and a driven sprocket is sleeved on the rotating shaft. The driving sprocket and the driven sprocket are driven by a chain. The driven sprocket rotates, driving the rotating shaft to rotate. One end of the rotating shaft passes through the other end of the swing arm and is fixed to the other end of the swing arm. When the rotating shaft rotates, the swing arm rotates around the frame.

3. The fabric tensioning mechanism according to claim 2, characterized in that: The second pushing component includes a transmission component and a cylinder. The transmission component is mounted on the swing arm, and the cylinder is mounted on the frame and connected to the transmission component. When the cylinder extends or retracts, it drives the swing arm to rotate through the transmission component.

4. The fabric tensioning mechanism according to claim 3, characterized in that: The transmission component includes a transmission base and a rotating sleeve. The transmission base is fixed on the swing arm, one end of the rotating sleeve is rotatably connected to the transmission base, and the other end of the rotating sleeve is for the cylinder shaft to be inserted.

5. A fabric tensioning mechanism according to claim 3 or 4, characterized in that: The cylinder is located at the bottom of the frame and below the swing arm, and the cylinder is rotatably connected to the frame.

6. A fabric tensioning mechanism according to claim 3 or 4, characterized in that: The cylinder is rotatably connected to the frame, and the frame is positioned on one side of the swing arm.

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