A copper wire annealing and cooling integrated processing device

Abstract

This invention discloses an integrated copper wire annealing and cooling processing device, belonging to the technical field of annealing equipment. It includes a feeding unit; a pre-heating cylinder is fixedly mounted on the side of the feeding unit via a bracket; a mid-position slow-cooling cylinder is fixedly mounted on the side of the pre-heating cylinder via bolts; and a rear-position rapid-cooling cylinder is fixedly mounted on the side of the mid-position slow-cooling cylinder via bolts. Through power adjustment of the heating wire assembly and temperature control using phase change materials, uniform and stable annealing is achieved, adapting to copper wires of different specifications, reducing internal stress and defects in the copper wire, and improving the toughness and surface quality of the copper wire. The mid-position slow cooling and rear-position rapid cooling are staged and coordinated, ensuring uniform and efficient cooling, avoiding oxidation and water stains on the copper wire surface, and guaranteeing product consistency. The support assembly and ceramic guide wheel assembly reduce friction and damage during copper wire operation, and the winding tension adjustment function prevents the copper wire from being stretched and deformed.

Description

Technical Field

[0001] This invention relates to the field of annealing equipment technology, specifically to an integrated copper wire annealing and cooling processing device. Background Technology

[0002] In the copper wire processing production process, annealing and cooling are the core processes that determine the quality of copper wire. Their treatment effect directly affects the toughness, conductivity and surface quality of copper wire. Copper wire processing, which is widely used in the power, electronics and other fields, must go through these two key processes.

[0003] Existing annealing equipment has low temperature control accuracy and mostly adopts a single heating structure, lacking an effective temperature buffer and stabilization mechanism. This can easily lead to sudden rises and falls in annealing temperature, causing stress inside the copper wire and resulting in defects such as cracking and deformation. Furthermore, it is difficult to adapt to the differentiated annealing requirements of copper wires of different specifications, resulting in poor applicability. At the same time, traditional annealing equipment has insufficient heat preservation performance, resulting in serious heat loss and high energy consumption, which increases production and operating costs. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides an integrated copper wire annealing and cooling processing apparatus.

[0005] This invention is implemented as follows: a copper wire annealing and cooling integrated processing device is constructed, which includes a feeding unit; a front heating cylinder is fixedly installed on the side of the feeding unit via a bracket; a middle slow cooling cylinder is fixedly installed on the side of the front heating cylinder via bolts; a rear fast cooling cylinder is fixedly installed on the side of the middle slow cooling cylinder via bolts; and a receiving unit is fixedly installed on the side of the rear fast cooling cylinder via a bracket. The preheating cylinder includes a combined cylinder body fixedly installed on the side support of the feeding unit; an electric heating wire assembly is wound around the inner side wall of the combined cylinder body, and a heat-conducting ring is also fixedly installed on the inner side wall of the combined cylinder body through a fulcrum; a cover plate is also fixedly installed on the side of the heat-conducting ring, and a support port assembly is fixedly installed at the central through hole of the cover plate; an arc-shaped inner cavity is provided inside the heat-conducting ring, and a phase change material with heat-conducting function is provided inside the inner cavity; a heat-insulating baffle plate with heat-insulating function is also provided on the side of the phase change material.

[0006] Preferably, the support port assembly includes a hollow ring fixedly installed at the central through hole of the side cover plate of the heat-conducting ring; a connecting pipe port is inserted into the side of the hollow ring, and the connecting pipe port is inserted into the interior of the combined cylinder; the hollow ring is arranged in two sets of upper and lower semi-rings, and a connecting sleeve with a communication function is provided between the two sets of hollow rings; a rubber plate is fixedly installed on the inner arc surface of the hollow ring, and a metal plate is fixedly installed at the opening on the rubber plate; the metal plate has a convex structure, and ball bearings are rotatably arranged on the metal plate.

[0007] Preferably, the centrally located slow-cooling cylinder is equipped with a guiding mechanism and a temperature equalization mechanism. The guiding mechanism is specifically a ceramic guide wheel assembly installed on the cylinder wall of the centrally located slow-cooling cylinder. The axis of the guide wheel is parallel to the running direction of the copper wire, and an arc-shaped guide groove is opened on the surface of the guide wheel. The groove diameter matches the diameter of the copper wire.

[0008] Preferably, the temperature equalization mechanism of the centrally placed slow-cooling cylinder consists of a spiral flow channel disposed on the cylinder wall of the centrally placed slow-cooling cylinder and quick connectors connected to both ends of the spiral flow channel; and the spiral flow channel is provided with a fluid that has a heat exchange function, and the fluid flow direction is opposite to the running direction of the copper wire.

[0009] Preferably, the rear rapid cooling cylinder is provided with an air knife pre-cooling unit, an atomizing spray cooling unit, and a negative pressure water absorption unit arranged sequentially along the copper wire running direction inside the cylinder. The air knife pre-cooling unit is located at the inlet of the rear rapid cooling cylinder and adopts two sets of symmetrically arranged high-pressure narrow-slit air knives. The air knives are connected to an external high-pressure air pump and dry compressed air is introduced. The high-pressure airflow quickly sweeps the surface of the copper wire and removes some of the heat from the surface of the copper wire.

[0010] Preferably, the atomizing spray cooling unit is located behind the air knife precooling unit, and adopts a fan-shaped + cone-shaped combined nozzle array. The nozzles are evenly arranged on the upper and lower sides of the copper wire. The nozzles are mounted on a rotatable adjustable seat and are connected to an external high-pressure atomizing pump and a coolant storage tank. A spiral guide groove is provided on the inner wall of the cooling chamber.

[0011] Preferably, the negative pressure water absorption unit is located behind the atomizing spray cooling unit and adopts a combination structure of negative pressure suction nozzle and liquid collection chamber. The suction nozzle is symmetrically arranged on both sides of the copper wire. The negative pressure is generated by the negative pressure fan to quickly suck away the atomized liquid droplets remaining on the surface of the copper wire. The liquid collection chamber is located below the negative pressure suction nozzle and is connected to the coolant return pipe.

[0012] Preferably, the outer wall of the combined cylinder of the preheating cylinder is wrapped with a heat insulation cotton layer, and a metal protective shell is fitted on the outside of the heat insulation cotton layer. The metal protective shell is detachably connected to the combined cylinder by a buckle, and a flame retardant is added inside the metal protective shell.

[0013] Preferably, the receiving unit includes a receiving roller, a drive motor, and a tension adjustment component. The tension adjustment component is located between the receiving roller and the rear fast cooling cylinder and consists of an adjustment guide wheel, a tension sensor, and a cylinder. The tension sensor is electrically connected to the drive motor.

[0014] The present invention has the following advantages: The present invention provides an integrated copper wire annealing and cooling processing device through improvements, which, compared with similar equipment, has the following improvements: The copper wire annealing and cooling integrated processing device of this invention achieves uniform and stable annealing through power adjustment of the heating wire group and temperature control of the phase change material. It is suitable for copper wires of different specifications, reduces internal stress and defects in the copper wire, and improves the toughness and surface quality of the copper wire. The combination of mid-stage slow cooling and post-stage rapid cooling ensures uniform and efficient cooling, avoids oxidation and water stains on the surface of the copper wire, and ensures product consistency. The support port assembly and ceramic guide wheel group reduce friction and damage to the copper wire during operation, and the winding tension adjustment function prevents the copper wire from being stretched and deformed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the axial structure of the front heating cylinder of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the preheating cylinder of the present invention; Figure 4 This is a schematic diagram of the axial structure of the support port assembly of the present invention.

[0016] Among them: feeding unit-1, front heating cylinder-2, middle slow cooling cylinder-3, rear fast cooling cylinder-4, receiving unit-5, combined cylinder-21, heating wire assembly-22, heat conducting ring-23, phase change material-24, heat insulation plate-25, support port assembly-26, hollow ring-261, connecting pipe port-262, connecting sleeve port-263, rubber plate-264, metal plate-265, ball bearing-266. Detailed Implementation

[0017] The following is in conjunction with the appendix Figures 1-4 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0020] Example 1:

[0021] Please see Figures 1-4 The present invention provides an integrated copper wire annealing and cooling processing device, comprising a feeding unit 1; a front heating cylinder 2 is fixedly installed on the side of the feeding unit 1 via a bracket; a middle slow cooling cylinder 3 is fixedly installed on the side of the front heating cylinder 2 via bolts; a rear fast cooling cylinder 4 is fixedly installed on the side of the middle slow cooling cylinder 3 via bolts; and a receiving unit 5 is fixedly installed on the side of the rear fast cooling cylinder 4 via a bracket.

[0022] The preheating cylinder 2 includes a combined cylinder 21 fixedly mounted on the side support of the feeding unit 1; an electric heating wire assembly 22 is wound around the inner wall of the combined cylinder 21, and a heat-conducting ring 23 is also fixedly mounted on the inner wall of the combined cylinder 21 through a fulcrum; a cover plate is also fixedly mounted on the side of the heat-conducting ring 23, and a support port assembly 26 is fixedly mounted at the central through hole of the cover plate; the heat-conducting ring 23 has an arc-shaped inner cavity, and a phase change material 24 with heat-conducting function is disposed in the inner cavity; a heat-insulating baffle 25 with heat-insulating function is also disposed on the side of the phase change material 24.

[0023] The support assembly 26 includes a hollow ring 261 fixedly installed at the central through hole of the side cover plate of the heat-conducting ring 23; a connecting pipe port 262 is inserted into the side of the hollow ring 261, and the connecting pipe port 262 is inserted into the interior of the combined cylinder 21; the hollow ring 261 is arranged in two sets of upper and lower semi-rings, and a connecting sleeve 263 with a communication function is provided between the two sets of hollow rings 261; a rubber plate 264 is fixedly installed on the inner arc surface of the hollow ring 261, and a metal plate 265 is fixedly installed at the opening on the rubber plate 264; the metal plate 265 has a convex structure, and a ball bearing 266 is rotatably arranged on the metal plate 265.

[0024] The centrally located slow-cooling cylinder 3 is equipped with a guiding mechanism and a temperature equalization mechanism. The guiding mechanism is a ceramic guide wheel assembly set on the cylinder wall of the centrally located slow-cooling cylinder 3. The axis of the guide wheel is parallel to the running direction of the copper wire, and an arc-shaped guide groove is opened on the surface of the guide wheel. The groove diameter matches the diameter of the copper wire.

[0025] The temperature equalization mechanism of the central slow cooling cylinder 3 consists of a spiral flow channel set on the cylinder wall of the central slow cooling cylinder 3 and quick connectors connected to both ends of the spiral flow channel; and the spiral flow channel is provided with a fluid with heat exchange function, and the fluid flow direction is opposite to the running direction of the copper wire.

[0026] The outer wall of the combined cylinder 21 of the preheating cylinder 2 is wrapped with a layer of heat insulation cotton, and a metal protective shell is fitted on the outside of the heat insulation cotton layer. The metal protective shell is detachably connected to the combined cylinder 21 by a buckle, and flame retardant is added inside the metal protective shell.

[0027] The receiving unit 5 includes a receiving roller, a drive motor, and a tension adjustment component. The tension adjustment component is located between the receiving roller and the rear fast cooling cylinder 4 and consists of an adjustment guide wheel, a tension sensor, and a cylinder. The tension sensor is electrically connected to the drive motor.

[0028] Example 2:

[0029] Please see Figures 1-4 The copper wire annealing and cooling integrated treatment device of the present invention, compared with the first embodiment, further includes: an air knife pre-cooling unit, an atomizing spray cooling unit and a negative pressure water absorption unit are arranged sequentially inside the rear rapid cooling cylinder 4 along the running direction of the copper wire; the air knife pre-cooling unit is set at the inlet of the rear rapid cooling cylinder 4, and adopts two sets of symmetrically arranged high-pressure narrow-slit air knives. The air knives are connected to an external high-pressure air pump, and dry compressed air is introduced to quickly sweep the surface of the copper wire through the high-pressure airflow, thereby removing part of the heat from the surface of the copper wire.

[0030] The atomizing spray cooling unit is located behind the air knife precooling unit. It adopts a fan-shaped + cone-shaped combined nozzle array. The nozzles are evenly arranged on the upper and lower sides of the copper wire. The nozzles are mounted on a rotatable adjustable seat and are connected to an external high-pressure atomizing pump and coolant storage tank. The inner wall of the cooling chamber is provided with a spiral guide groove.

[0031] The negative pressure water suction unit is located behind the atomizing spray cooling unit. It adopts a combination structure of negative pressure suction nozzle and liquid collection chamber. The suction nozzle is symmetrically arranged on both sides of the copper wire. The negative pressure is generated by the negative pressure fan to quickly suck away the atomized liquid droplets remaining on the surface of the copper wire. The liquid collection chamber is located below the negative pressure suction nozzle and is connected to the coolant return pipe.

[0032] The working principle of the integrated copper wire annealing and cooling processing device described above is as follows: First, when using this device, place it in the work area, and then connect it to an external power source to provide the power required for its operation. Second, after the device is started, the feeding unit 1 precisely connects with the front heating cylinder 2 through the bracket and smoothly releases the copper wire, ensuring that the copper wire enters the front heating cylinder 2 at a constant speed. The copper wire then passes through the middle slow cooling cylinder 3 and the rear fast cooling cylinder 4 in sequence. After being processed step by step by each unit, the taking-up unit 5 completes the uniform winding. Third, after the copper wire enters the heat-conducting ring 23, the heating wire assembly 22 wound around the inner wall of the combined cylinder 21 generates heat when energized. The annealing temperature can be precisely adjusted by controlling the power. The heat-conducting ring 23 is fixed to the inner wall of the combined cylinder 21 by a fulcrum, which can quickly absorb the heat generated by the heating wire assembly 22 and transfer it to the copper wire. The phase change material 24 in its internal arc-shaped cavity can store heat and release it slowly, avoiding sudden temperature rises and falls, achieving stable control of the annealing temperature, and adapting to copper wires of different specifications and annealing requirements. The support port assembly 26 in the center of the side cover plate of the heat-conducting ring 23 guides the copper wire. The upper and lower semi-annular hollow rings 261 of the support port assembly 26 are connected by the connecting sleeve 263 to form a wrap-around support for the copper wire. The heat exchange fluid is introduced into the hollow ring 261 through the connecting pipe 262, and the liquid pressure of the heat exchange fluid supports the rubber plate 264, so that the metal plate 265 and the ball bearings 266 on the rubber plate 264 provide support for the copper wire. In addition, the heat insulation cotton layer on the outer wall of the combined cylinder 21 reduces heat loss, the metal protective shell plays a protective role, the flame retardant added inside improves safety, and the protective shell can be removed by buckle for easy maintenance. Fourth, the copper wire temperature is high after annealing by the preheating cylinder 2. The ceramic guide wheel assembly on the wall of the central slow cooling cylinder 3 provides guidance for the copper wire. The axis of the guide wheel is parallel to the running direction of the copper wire, and the arc-shaped guide groove on the surface matches the diameter of the copper wire to ensure that the copper wire runs in a straight line. The heat insulation performance of the ceramic material also prevents the guide wheel from absorbing the heat of the copper wire and affecting the slow cooling effect. The heat exchange fluid is introduced into the spiral flow channel on the cylinder wall. The fluid flow direction is opposite to the running direction of the copper wire to form countercurrent heat exchange, which can quickly and evenly absorb the heat of the copper wire, so that the copper wire cools down slowly. The spiral structure prolongs the contact time between the fluid and the cylinder wall, improving the heat exchange efficiency. The quick connectors at both ends of the flow channel facilitate the fluid inlet and outlet, and the flow rate can be adjusted according to the cooling requirements. Fifth, the two sets of symmetrical high-pressure narrow-slit air knives at the inlet of the rear-mounted rapid cooling cylinder 4 are connected to an external high-pressure air pump, through which dry compressed air is introduced. The high-pressure airflow sweeps the surface of the copper wire, carrying away some heat to achieve preliminary cooling, while blowing away surface dust and impurities. The fan-shaped and cone-shaped combined nozzle array behind the air knife pre-cooling unit is evenly arranged on the upper and lower sides of the copper wire. The nozzles are mounted on a rotatable adjustable seat and connected to an external high-pressure atomizing pump and coolant storage tank. The coolant is atomized and evenly sprayed onto the surface of the copper wire. The cooling is achieved by rapidly absorbing heat through the evaporation of the coolant. The spiral guide groove on the inner wall of the cooling chamber guides the atomized coolant to be evenly distributed, improving the cooling uniformity. The negative pressure water suction unit behind the atomized spray cooling unit generates negative pressure through a negative pressure fan. The symmetrically arranged negative pressure suction nozzles quickly suck up the residual atomized liquid droplets on the surface of the copper wire. The liquid collection chamber below collects the coolant and recovers it through the return pipe, achieving recycling and reducing operating costs.

[0033] This invention provides an improved integrated copper wire annealing and cooling device. Through power adjustment of the heating wire assembly and temperature control using phase change materials, it achieves uniform and stable annealing, adapts to copper wires of different specifications, reduces internal stress and defects in the copper wire, and improves the toughness and surface quality of the copper wire. The combination of mid-stage slow cooling and post-stage rapid cooling ensures uniform and efficient cooling, preventing oxidation and water residue on the copper wire surface and ensuring product consistency. The support assembly and ceramic guide wheel assembly reduce friction and damage during copper wire operation, while the winding tension adjustment function prevents the copper wire from stretching and deforming.

[0034] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A copper wire annealing and cooling integrated processing device, comprising a feeding unit (1); a front heating cylinder (2) is fixedly installed on the side of the feeding unit (1) by a bracket; a middle slow cooling cylinder (3) is fixedly installed on the side of the front heating cylinder (2) by bolts; a rear fast cooling cylinder (4) is fixedly installed on the side of the middle slow cooling cylinder (3) by bolts; and a receiving unit (5) is fixedly installed on the side of the rear fast cooling cylinder (4) by a bracket. Its features are: The preheating cylinder (2) includes a combined cylinder (21) fixedly installed on the side support of the feeding unit (1); an electric heating wire group (22) is wound on the inner wall of the combined cylinder (21), and a heat-conducting ring (23) is also fixedly installed on the inner wall of the combined cylinder (21) through a fulcrum; a cover plate is also fixedly installed on the side of the heat-conducting ring (23), and a support port assembly (26) is fixedly installed at the central through hole of the cover plate; an arc-shaped inner cavity is provided inside the heat-conducting ring (23), and a phase change material (24) with heat-conducting function is provided inside the inner cavity; a heat-insulating baffle (25) with heat-insulating function is also provided on the side of the phase change material (24).

2. The copper wire annealing and cooling integrated processing device according to claim 1, characterized in that: The support port assembly (26) includes a hollow ring (261) fixedly installed at the central through hole of the side cover plate of the heat-conducting ring (23); a connecting pipe port (262) is inserted into the side of the hollow ring (261), and the connecting pipe port (262) is inserted into the interior of the combined cylinder (21); the hollow ring (261) is arranged in two sets of upper and lower semi-rings, and a connecting sleeve (263) with a communication function is provided between the two sets of hollow rings (261); a rubber plate (264) is fixedly installed on the inner arc surface of the hollow ring (261), and a metal plate (265) is fixedly installed at the opening on the rubber plate (264); the metal plate (265) has a convex structure, and a ball bearing (266) is rotatably arranged on the metal plate (265).

3. The copper wire annealing and cooling integrated processing device according to claim 2, characterized in that: The central slow-cooling cylinder (3) is equipped with a guide mechanism and a temperature equalization mechanism. The guide mechanism is specifically a ceramic guide wheel assembly set on the cylinder wall of the central slow-cooling cylinder (3). The axis of the guide wheel is parallel to the running direction of the copper wire, and an arc-shaped guide groove is opened on the surface of the guide wheel. The groove diameter matches the diameter of the copper wire.

4. The copper wire annealing and cooling integrated processing device according to claim 3, characterized in that: The temperature equalization mechanism of the central slow cooling cylinder (3) consists of a spiral flow channel set on the cylinder wall of the central slow cooling cylinder (3) and quick connectors connected to both ends of the spiral flow channel; and the spiral flow channel is provided with a fluid with heat exchange function, and the fluid flow direction is opposite to the copper wire running direction.

5. The integrated copper wire annealing and cooling treatment device according to claim 4, characterized in that: The rear rapid cooling cylinder (4) is arranged in sequence along the copper wire running direction with an air knife pre-cooling unit, an atomizing spray cooling unit and a negative pressure water absorption unit. The air knife pre-cooling unit is located at the inlet of the rear rapid cooling cylinder (4) and adopts two sets of symmetrically arranged high-pressure narrow-slit air knives. The air knives are connected to an external high-pressure air pump and dry compressed air is introduced. The high-pressure airflow quickly sweeps the surface of the copper wire and removes some of the heat from the surface of the copper wire.

6. The integrated copper wire annealing and cooling treatment device according to claim 5, characterized in that: The atomizing spray cooling unit is located behind the air knife precooling unit. It adopts a fan-shaped + cone-shaped combined nozzle array, with the nozzles evenly arranged on the upper and lower sides of the copper wire. The nozzles are mounted on a rotatable adjustable seat and are connected to an external high-pressure atomizing pump and coolant storage tank. The inner wall of the cooling chamber is provided with a spiral guide groove.

7. The integrated copper wire annealing and cooling treatment device according to claim 6, characterized in that: The negative pressure water absorption unit is located behind the atomizing spray cooling unit. It adopts a combination structure of negative pressure suction nozzle and liquid collection chamber. The suction nozzle is symmetrically arranged on both sides of the copper wire. The negative pressure is generated by the negative pressure fan to quickly suck away the atomized liquid droplets remaining on the surface of the copper wire. The liquid collection chamber is located below the negative pressure suction nozzle and is connected to the coolant return pipe.

8. The integrated copper wire annealing and cooling treatment device according to claim 7, characterized in that: The outer wall of the combined cylinder (21) of the preheating cylinder (2) is wrapped with a heat insulation cotton layer, and a metal protective shell is fitted on the outside of the heat insulation cotton layer. The metal protective shell and the combined cylinder (21) are detachably connected by a buckle, and flame retardant is added inside the metal protective shell.

9. The copper wire annealing and cooling integrated processing device according to claim 8, characterized in that: The receiving unit (5) includes a receiving roller, a drive motor and a tension adjustment component. The tension adjustment component is located between the receiving roller and the rear fast cooling cylinder (4) and consists of an adjustment guide wheel, a tension sensor and a cylinder. The tension sensor is electrically connected to the drive motor.

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