A tension sensor

Abstract

This utility model relates to a tension sensor. The outer and inner rings of a force-bearing disc are connected by a deformation beam, with a deformation gap between them. A pressure strain gauge is mounted on the deformation beam and electrically connected to an external device. The inner ring of the inner ring is coaxially connected to a roller. The tension of the rolled material is transmitted to the inner ring via the roller. The inner ring shifts relative to the outer ring, causing the deformation beam to deform. The pressure strain gauge deforms synchronously, and the deformation signal is converted into an electrical signal and transmitted to the external device to characterize the tension of the rolled material. This tension sensor features a detachable bearing structure, improving its overall service life. The concentric ring design simplifies the mechanical structure of force transmission and reduces the space occupied by the tension sensor in the device. Furthermore, the structure connecting the outer and inner rings via the deformation beam allows the deformation beam to quickly provide deformation feedback when the inner ring is subjected to force, which is then fed back as a tension signal through the pressure strain gauge, resulting in high sensor sensitivity.

Description

Technical Field

[0001] The utility model relates to the field of coil processing, and particularly relates to a tension sensor. Background Art

[0002] The tension sensor is a core component in the tension control system during the coil processing production. By detecting the tension of the coil moving at high speed, it provides a signal basis for tension control to ensure product quality and production efficiency, and is widely used in industries such as printing and packaging, papermaking, sanitary products, and lithium battery production. In the existing tension sensor, a base mounting bracket is set on one side of the deformation beam, a connecting hole is set on the other side with a connecting shaft inside, a bearing and a two-piece coupling are set on one side of the connecting shaft and connected to the tension detection roller shaft, and a pressure sensor is set inside the deformation beam. The pressure sensor detects the force condition of the roller shaft through an intermediate structure to characterize the tension of the coil on the roller shaft. However, this kind of tension sensor occupies a large axial space due to the axially distributed structure, and it is difficult to ensure the same coaxiality of each structure. The built-in bearing will affect the tension detection and is difficult to replace due to damage or reduced performance. The uneven contact between the two-piece coupling of the roller shaft and the pressure sensor easily leads to low sensitivity of the tension sensor. Content of the Utility Model

[0003] In order to overcome the above problems, the utility model provides a tension sensor. The technical solution adopted by the utility model to solve its technical problems is as follows:

[0004] A tension sensor includes a force-receiving disc, the force-receiving disc includes an outer ring and an inner ring, the outer ring and the inner ring are connected by a deformation beam, and there is a deformation gap between the inner circle of the outer ring and the outer circle of the inner ring; a pressure strain gauge is arranged on the deformation beam, the pressure strain gauge is electrically connected to an external device, and the inner circle of the inner ring is coaxially connected to a roller shaft.

[0005] Further, the outer ring and the inner ring are arranged in a "hui" shape, and the outer ring and the inner ring are symmetrically connected by two deformation beams.

[0006] Further, an overload protection hole is arranged in the deformation gap, and a safety pin is arranged in the overload protection hole.

[0007] Further, a deformation hole is arranged below the deformation beam to make the deformation beam in an arch-shaped structure, and the pressure strain gauge is attached to the upper surface of the deformation beam.

[0008] Further, the pressure strain gauge is pasted on the upper surface of the deformation beam through a special glue, and a Wheatstone full-bridge circuit is formed by welding on the strain gauge; an electrical connection head is arranged on the outer ring, and the pressure strain gauge is connected to an external device through the electrical connection head.

[0009] Further, a snap ring is arranged on the inner ring, and the roller shaft with a bearing is inserted and fixed in the inner ring by the snap ring.

[0010] Furthermore, a front cover and a rear cover are respectively provided on the front and rear sides of the force-receiving plate. The front cover is connected to the front side of the outer ring, and the rear cover is connected to the rear side of the outer ring. A shaft hole is provided in the center of the front cover, through which the roller passes and is connected to the inner ring of the inner ring. A positioning step is provided on one side for installation on the outside of the equipment wall panel. The rear cover closes the rear end face of the force-receiving plate, and a positioning step is provided on one side for installation on the inside of the equipment wall panel. The front cover, the rear cover, and the force-receiving plate together form a through hole, through which the tension sensor is fixed on the equipment as a whole.

[0011] Furthermore, a rubber ring is provided inside the shaft hole, and the roller shaft passes through the rubber ring to connect with the inner ring of the inner ring.

[0012] The beneficial effects of this utility model are:

[0013] This tension sensor includes a force-receiving plate comprising an outer ring and an inner ring connected by a deformation beam. A deformation gap exists between the inner ring of the outer ring and the outer ring of the inner ring. A pressure strain gauge is mounted on the deformation beam and electrically connected to an external device. The inner ring of the inner ring is coaxially connected to a roller. The tension of the rolled material is transmitted to the inner ring via the roller. The inner ring shifts relative to the outer ring, causing deformation of the deformation beam. The pressure strain gauge deforms synchronously, and the deformation signal is converted into an electrical signal and transmitted to the external device to characterize the tension of the rolled material. The detachable bearing structure of this tension sensor effectively improves its overall service life. The concentric ring design simplifies the mechanical structure of force transmission and reduces the space occupied by the tension sensor in the equipment. Furthermore, the structure connecting the outer and inner rings via the deformation beam allows the deformation beam to quickly provide deformation feedback when the inner ring is subjected to force, which is then fed back as a tension signal through the pressure strain gauge, resulting in high sensor sensitivity. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, wherein:

[0015] Figure 1 This is the front view of the force-bearing plate;

[0016] Figure 2 This is an exploded view of a tension sensor.

[0017] Figure number marking:

[0018] 100. Load-bearing plate; 101. Outer ring; 102. Inner ring; 103. Deformation beam; 104. Deformation gap; 105. Pressure strain gauge; 106. Overload protection hole; 107. Safety pin; 108. Deformation hole; 109. Electrical connector; 110. Snap ring; 111. Front cover; 112. Rear cover; 113. Shaft hole; 114. Rubber ring. Detailed Implementation

[0019] In order to better understand the purpose, structure and function of the present utility model, the following will further describe in detail the specific embodiments of the "tension sensor" of the present utility model with reference to the attached drawings.

[0020] See Figure 1 and Figure 2 , in this embodiment, the tension sensor includes a force-receiving disc 100. The force-receiving disc 100 includes an outer ring 101 and an inner ring 102. The outer ring 101 and the inner ring 102 are connected by a deformation beam 103, and there is a deformation gap 104 between the inner circle of the outer ring 101 and the outer circle of the inner ring 102. The inner ring 102 can shift within the range of the deformation gap 104, thereby causing the deformation beam 103 to deform; a pressure strain gauge 105 is provided on the deformation beam 103. The pressure strain gauge 105 is electrically connected to an external device, and the inner circle of the inner ring 102 is coaxially connected to a roller shaft. During operation, the tension of the coil is transmitted to the inner ring 102 through the roller shaft. The inner ring 102 shifts relative to the outer ring 101, and the shift causes the deformation beam 103 to deform. The pressure strain gauge 105 on the deformation beam 103 deforms synchronously and converts the deformation signal into an electrical signal, which is transmitted to an external device through a signal amplifier to monitor the tension of the coil in real time. The tension sensor of the present utility model solves the problem that it is difficult to ensure the coaxiality of the axial assembly of multiple parts through a concentric ring design, and greatly reduces the number of parts and the space occupied by the tension sensor in the equipment. A snap ring 110 is used to fix the replaceable bearing of the roller, improving the adaptability of the present tension sensor. Moreover, the roller shaft directly acts on the inner ring 102, and is only connected to the outer ring 101 through the deformation beam 103. The deformation beam 103 can sensitively feedback the shift of the inner ring, and the pressure strain gauge 105 can also give a signal feedback in time. This tension sensor has high sensitivity.

[0021] Further see Figure 2 , in this embodiment, the outer ring 101 and the inner ring 102 are arranged in a "hui" shape. The upper and lower ends of the outer ring 101 and the inner ring 102 are symmetrically connected by two deformation beams 103, improving the structural stability of the force-receiving disc 100. And, preferably, the force-receiving disc 100 is integrally formed and made of a steel deformation material, having good rigidity and strength. It should be noted that in this embodiment, only one pressure strain gauge 105 needs to be provided on one of the deformation beams 103 to complete the collection of the deformation signal.

[0022] Further see Figure 1 , in this embodiment, an overload protection hole 106 is provided in the deformation gap 104, and a safety pin 107 is provided in the overload protection hole 106. In this way, when the coil tension is overloaded and before the deformation degree of the deformation beam 103 exceeds the elastic deformation range, the safety pin 107 will limit the further shift of the inner ring 102, preventing the tension sensor from being damaged due to overload.

[0023] More specifically, in this embodiment, a deformation hole 108 is provided below the deformation beam 103, making the deformation beam 103 have an arch bridge structure. The deformation beam 103 is easy to deform, and the pressure strain gauge 105 is attached to the upper surface of the deformation beam 103, making it easier to receive the deformation signal from the deformation beam 103, and further improving the sensitivity of the tension sensor.

[0024] In this embodiment, the pressure strain gauge 105 is attached to the upper surface of the deformation beam 103 with special adhesive. A Wheatstone full-bridge circuit is formed on the pressure strain gauge 105 by welding. The tension signal is efficiently fed back using the principle of Wheatstone full-bridge resistive pressure strain gauge. An electrical connector 109 is provided on the outer ring 101, and the pressure strain gauge 105 is connected to an external device through the electrical connector 109.

[0025] See further Figure 1 and Figure 2 In this embodiment, the inner ring 102 is provided with a retaining ring 110, which passes through and fixes the bearing roller shaft in the inner ring 102. The retaining ring 110 can be adapted to various types of bearings, improving the adaptability of this tension sensor.

[0026] More specifically, in this embodiment, a front cover 111 and a rear cover 112 are respectively provided on the front and rear sides of the force-receiving disk 100. The front cover 111 is connected to the front side of the outer ring 101, and the rear cover 112 is connected to the rear side of the outer ring 101. A shaft hole 113 is provided in the center of the front cover 111, through which the roller passes and connects to the inner ring of the inner ring 102. A positioning step is provided on one side for installation on the outside of the equipment wall panel. The rear cover 112 closes the rear end face of the force-receiving disk 100 to prevent dust from entering the sensor. A positioning step is provided on one side for installation on the inside of the equipment wall panel. The front cover, rear cover, and force-receiving disk together form a through hole, through which the tension sensor is fixed to the entire device, allowing the tension sensor to be installed in a small space. Furthermore, a rubber ring 114 is provided in the shaft hole 113, through which the roller passes and connects to the inner ring of the inner ring 102. The rubber ring 114 can prevent dust from entering the sensor along the roller.

[0027] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In the description of this application, "multiple" and "several" are understood as "at least two." "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. A and B are connected, which can indicate two situations: A and B are directly connected and A and B are connected through C. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A tension sensor characterized by, It includes a force-receiving disc (100), the force-receiving disc (100) includes an outer ring (101) and an inner ring (102), the outer ring (101) and the inner ring (102) are connected by a deformation beam (103), and there is a deformation gap (104) between the inner circle of the outer ring (101) and the outer circle of the inner ring (102); a pressure strain gauge (105) is arranged on the deformation beam (103), the pressure strain gauge (105) is electrically connected to an external device, and the inner circle of the inner ring (102) is coaxially connected to a roller shaft.

2. A tension sensor according to claim 1, wherein The outer ring (101) and the inner ring (102) are arranged in a "return" shape, and the outer ring (101) and the inner ring (102) are symmetrically connected by two of the deformation beams (103).

3. A tension sensor according to claim 1, wherein An overload protection hole (106) is arranged in the deformation gap (104), and a safety pin (107) is arranged in the overload protection hole (106).

4. The tension sensor of claim 1, wherein, A deformation hole (108) is arranged below the deformation beam (103), so that the deformation beam (103) has an arch-shaped structure, and the pressure strain gauge (105) is attached to the upper surface of the deformation beam (103).

5. A tension sensor according to claim 4, wherein The pressure strain gauge (105) is pasted on the upper surface of the deformation beam (103), and a Wheatstone full-bridge circuit is formed by welding on the strain gauge (105); an electrical connection head (109) is arranged on the outer ring (101), and the pressure strain gauge (105) is connected to an external device through the electrical connection head (109).

6. The tension sensor of claim 1, wherein, A snap ring (110) is arranged on the inner ring (102), and the roller shaft with a bearing is passed through and fixed in the inner ring (102) by the snap ring (110).

7. The tension sensor of claim 1, wherein, A front cover (111) and a rear cover (112) are respectively arranged on the front and rear sides of the force-receiving disc (100), the front cover (111) is connected to the front side of the outer ring (101), and the rear cover (112) is connected to the rear side of the outer ring (101); a shaft hole (113) is arranged at the center of the front cover (111), the roller shaft passes through the shaft hole (113) and is connected to the inner circle of the inner ring (102), and a positioning step is arranged on one side of the front cover (111) for the case of external installation on the equipment wall panel; the rear cover (112) closes the rear end face of the force-receiving disc (100), and a positioning step is set on one side of the rear cover (112) for the case of internal installation on the equipment wall panel. The front cover (111), the rear cover (112) and the force-receiving disc (100) together form a through-round hole, and the tension sensor is fixed on the equipment through the through-round hole.

8. A tension sensor according to claim 7, wherein A rubber ring (114) is arranged in the shaft hole (113), and the roller shaft passes through the rubber ring (114) and is connected to the inner circle of the inner ring (102).

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