Winding and / or unwinding device facilitating tension control

Abstract

The invention relates to a winding and / or unwinding device convenient for tension control, which comprises a base part and a rotating part, and the rotating part is rotatably connected to the base part; the rotating part comprises a first rotating part and a second rotating part; the first rotating part is used for being connected with a power source and can rotate relative to the base part; the second rotating part is used for loading a load and can rotate relative to the base part; the first rotating part is in power connection with the second rotating part; the rotating part is provided with a force sensor used for detecting the acting force between the first rotating part and the second rotating part. The acting force detected by the force sensor reflects the actual tension of the coiled material on coiling, so that the elastic factor of the coiled material in the guiding process is not included in a loop controlled by a tension closed loop, and the loop controlled by the closed loop is shorter; therefore, the control system can adjust the power source in real time so as to achieve accurate control over tension, and the phenomenon that tremor is likely to be caused due to delay on the loop is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of devices for winding and / or unwinding coils, and in particular to a winding and / or unwinding device which is convenient for tension control. Background Art

[0002] Many winding and / or unwinding devices need to control the tension of the coil to avoid the coil being too tight or too loose. In the prior art, a tension detection device is usually set in the guide path of the coil, and then tension rollers, magnetic powder clutches / magnetic powder brakes, etc. are used to control the tension. Among them, the technical solution using the tension roller method has the following deficiencies:

[0003] (1) It often requires multiple tension rollers to cooperate, the structure is not compact enough, and it takes up a lot of space.

[0004] (2) The coil needs to pass through a long guide path and the operation is complicated.

[0005] (3) Due to the certain distance from the tension detection device and the elastic effect of the coil, there is a certain delay in the closed-loop control, so the control of the tension is not precise enough.

[0006] However, the technical solution using the magnetic powder clutch / magnetic powder brake has the following shortcomings:

[0007] (1) A larger excitation current is required, which is not conducive to energy saving.

[0008] (2) Low transmission efficiency, easy to generate high temperature, and poor reliability.

[0009] (3) Since the control of tension depends on the friction between the driving shaft and the driven shaft, and there is a certain distance from the tension detection device, coupled with the elastic effect of the coil, there is a certain delay in the closed-loop control, making it difficult to accurately control the tension and easily causing vibration.

[0010] (4) The cost is high, the magnetic powder is easily consumed, and the magnetic powder needs to be replaced regularly, which has high maintenance costs and can easily lead to production delays. Summary of the invention

[0011] In order to solve the deficiencies of the prior art, the invention aims to provide a winding and / or unwinding device that is convenient for tension control.

[0012] In order to achieve the above-mentioned object of the invention, the present invention proposes the following technical solutions:

[0013] Technical solution 1:

[0014] A winding and / or unwinding device that is convenient for tension control, characterized in that it includes: a base part and a rotating part, the rotating part is rotatably connected to the base part; the rotating part includes a first rotating part for connecting to a power source and capable of rotating relative to the base part, and a second rotating part for loading a load and capable of rotating relative to the base part; the first rotating part is power-connected to the second rotating part; the rotating part is provided with a force sensor for detecting the force between the first rotating part and the second rotating part.

[0015] Operating principle and its beneficial effects:

[0016] (1) The tension of the coil when winding and / or unwinding will be transmitted to the rotating part, and manifested as the action force between the first rotating part and the second rotating part on the rotating part. The action force between the first rotating part and the second rotating part detected by the force sensor is correlated with the actual tension of the coil on the roll. Therefore, the elastic factor of the coil during the guiding process is not included in the loop of the tension closed-loop control. The closed-loop control loop is shorter, so that the control system can adjust the power source in real time to achieve precise control of the tension, and avoid the phenomenon of vibration caused by the delay in the loop. This improvement effect is more significant for coils with relatively large elasticity.

[0017] (2) The control system can achieve precise control of the tension by adjusting the power source, thus avoiding the problems of low transmission efficiency, disadvantageous for energy saving, easy to generate high temperature, difficult to precisely control the tension, and easy to cause vibration caused by the technical solution of the magnetic powder clutch / magnetic powder brake in the prior art, because the control of the tension depends on adjusting the friction between the driving shaft and the driven shaft.

[0018] (3) It is helpful to make the structure more compact, the operation more convenient, and to shorten the guide path of the coil.

[0019] Technical solution 2:

[0020] According to a further technical solution of Technical Solution 1, it is characterized in that an elastic member for transmitting power is connected between the first rotating part and the second rotating part.

[0021] Operation principle and beneficial effects: the elastic member provides a buffer space for tension control and is conducive to a more stable output of the tension.

[0022] Technical solution 3:

[0023] According to a further technical solution of Technical Solution 2, it is characterized in that: the force sensor includes a position sensor for detecting the positional relationship between the first rotating part and the second rotating part.

[0024] The position sensor may be, but is not limited to:

[0025] The encoder comprises a code disk and a code reading device, wherein the code disk and the code reading device are respectively arranged on the first rotating part and the second rotating part, and the code reading device reads the code disk to determine the relative position relationship between the first rotating part and the second rotating part. The principle can refer to the encoder of the servo motor.

[0026] An inductive position sensor, wherein the inductive position sensor comprises an inductive coil and a magnetic core, wherein the inductive coil and the magnetic core are respectively arranged on the first rotating part and the second rotating part, and a change in the relative position of the inductive coil and the magnetic core will cause a change in inductance, and the inductance is read to determine the relative position relationship between the first rotating part and the second rotating part.

[0027] In the capacitive position sensor, a change in the relative position between the first rotating part and the second rotating part will cause a change in capacitance, and the capacitance is read to determine the relative position relationship between the first rotating part and the second rotating part.

[0028] Working principle: Due to the existence of the elastic member, the greater the force between the first rotating part and the second rotating part, the greater the elastic deformation of the elastic member, and the greater the relative position offset between the first rotating part and the second rotating part. Therefore, by detecting the positional relationship between the first rotating part and the second rotating part, the size of the force between the first rotating part and the second rotating part can be obtained. Therefore, the elastic member and the position sensor jointly play the role of a force sensor.

[0029] Technical solution 4:

[0030] According to a further technical solution of Technical Solution 1, it is characterized in that: the force sensor includes a strainable component and a strain gauge, the strainable component is connected in at least one transmission path between the first rotating part and the second rotating part, and the strain gauge is mounted on the strainable component.

[0031] The strain gauge may include but is not limited to: a resistance strain gauge, a semiconductor strain gauge, or a fiber optic strain gauge.

[0032] Operating principle: The strainable component is elastic and will undergo micro-deformation under the action of external force, and will recover after the external force is eliminated. The micro-deformation is converted into an electrical signal through the strain gauge.

[0033] Technical problem: The force sensors mentioned above provide a basis for precise control of tension. However, when the signal output end of the force sensor is located at the rotating part, how to transmit the force data information obtained by the force sensor to the base part as a basis for tension control has become a problem that needs to be solved. If the force data information is transmitted through a sliding electrical connection using a mechanical contact slip ring, there will be a risk of noise interference caused by sliding friction and data transmission interruption caused by sliding surface wear; if the force data information is transmitted using a mercury slip ring, there will be problems such as high price, easy leakage of mercury and environmental toxicity risks; for this reason, the present invention proposes the following technical solutions:

[0034] Technical solution 5:

[0035] According to a further technical solution of Technical Solution 1, it is characterized in that: a wireless power transmission device is provided for non-contact transmission of electric energy to the rotating part, and the wireless power transmission device includes an electric energy sending unit and an electric energy receiving unit, the electric energy sending unit is arranged on the base part, and the electric energy receiving unit is arranged on the rotating part.

[0036] The power receiving unit may be arranged on the first rotating part, or may be arranged on the second rotating part, or the first rotating part and the second rotating part may be respectively provided with the power receiving unit.

[0037] Technical solution 6:

[0038] According to a further technical solution of Technical Solution 5, it is characterized in that: a power sending inductor and a power receiving inductor are provided for realizing wireless power transmission through electromagnetic coupling, the power sending inductor belongs to the power sending unit, and the power receiving inductor belongs to the power receiving unit.

[0039] Technical solution 7:

[0040] According to a further technical solution of Technical Solution 5, it is characterized in that: there are electroluminescent components and photoelectric power generation components for realizing wireless transmission of electric energy through light radiation, the electroluminescent components belong to the electric energy sending unit, and the photoelectric power generation components belong to the electric energy receiving unit.

[0041] The component may be a component (not containing semiconductor material), or a device (containing semiconductor material), or a component that is both a component and a device.

[0042] Operation principle and beneficial effects: When solving the problem of how to transmit the force data information obtained by the force sensor to the base part, a data acquisition and data processing circuit is set at the rotating part and close to the force sensor to process the original force data information and convert it into a digital signal, which is then transmitted to the base part. This can reduce the risk of the original force data information being easily superimposed with interference signals in a longer transmission line; the above-mentioned technical solutions 5, 6 and 7 can transmit electrical energy to the corresponding circuit devices of the rotating part in a non-contact manner, avoiding the problems caused by the use of slip rings and other devices for power transmission.

[0043] Technical solution 8:

[0044] According to a further technical solution of Technical Solution 7, it is characterized in that: the electroluminescent component is an LED.

[0045] Operating principle and beneficial effects: Using LED as the light source is beneficial to improving the efficiency of the light source.

[0046] Technical solution 9:

[0047] According to a further technical solution of Technical Solution 7, it is characterized in that: the solar power generation component is a photovoltaic panel.

[0048] Working principle: The photovoltaic panels are used to convert light energy into electrical energy.

[0049] Technical solution 10:

[0050] According to a further technical solution of Technical Solution 1, it is characterized in that: an optoelectronic communication device for contactless signal transmission is provided between the rotating part and the base part, and the optoelectronic communication device includes an optical signal transmitting unit and an optical signal receiving unit, the optical signal transmitting unit is arranged on the rotating part, and the optical signal receiving unit is arranged on the base part; however, it does not exclude that the rotating part is provided with an optical signal receiving unit, and it does not exclude that the base part is provided with an optical signal transmitting unit.

[0051] The optical signal transmitting unit may be provided on the first rotating part, or may be provided on the second rotating part, or the first rotating part and the second rotating part may be provided with the optical signal transmitting unit respectively.

[0052] Operation principle and beneficial effects: non-contact signal transmission is adopted between the rotating part and the base part, thus avoiding the problems caused by the above-mentioned slip ring and other devices.

[0053] statement:

[0054] (1) The winding and / or unwinding device mentioned in the present invention means a device for winding, or a device for unwinding, or a device having both winding and unwinding purposes.

[0055] (2) The present invention relates to a winding and / or unwinding device that is convenient for tension control, and provides convenient conditions for tension control of winding and / or unwinding.

[0056] (3) The base portion is used as the load-bearing part of the assembly and the reference for movement, and is not limited to a specific shape or form.

[0057] (4) The load includes a coil. If a power transmission component, a carrier (for example, a material roller), etc. are connected between the second rotating portion and the coil, then the power transmission component, the carrier, etc. are also part of the load.

[0058] (5) It is not limited to that all parts of the force sensor are arranged on the rotating part, that is, it does not exclude the situation that only a part of the force sensor is arranged on the rotating part; refer to the above-mentioned technical solution 3, for example, two sets of the encoders are arranged, the code disks of the two sets of encoders are respectively arranged on the first rotating part and the second rotating part, and two code reading devices are both arranged on the base part, which are used to read the position relationship of the first rotating part and the second rotating part relative to the base part respectively, and then calculate the position relationship between the first rotating part and the second rotating part based on this.

[0059] (6) The force sensor may include but is not limited to: a strain sensor, a piezoresistive force sensor, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] See the attached drawings of the specification, wherein:

[0061] Figure 1 It is a three-dimensional front view of the device of Example 1;

[0062] Figure 2 It is a three-dimensional front view of the device of Example 1 loaded with a material tray;

[0063] Figure 3 is a top perspective view of the device of Example 1;

[0064] Figure 4 It is a three-dimensional exploded view of the device of Example 1;

[0065] Figure 5 A three-dimensional view of the base portion of Example 1;

[0066] Figure 6 It is a three-dimensional bottom view of the bearing seat shell portion of Example 1;

[0067] Figure 7is a three-dimensional top view of the first rotating part of Example 1;

[0068] Figure 8 It is a three-dimensional bottom view of the first rotating part of Example 1;

[0069] Fig. 9 is a three-dimensional top view of the second rotating part of Example 1;

[0070] Fig.10 It is a three-dimensional bottom view of the second rotating part of Example 1;

[0071] Fig.11 A three-dimensional view of the base portion of Example 2;

[0072] Fig.12 This is a three-dimensional bottom view of the first rotating part of Example 2.

[0073] Fig.13 This is a three-dimensional side view of the device of Example 3.

[0074] Fig.14 This is a perspective view of the device of Example 3 viewed from the power output shaft end.

[0075] Fig.15 It is a cross-sectional view of the device of Example 3 along the direction of the power input and output shafts.

[0076] Fig.16 This is a three-dimensional exploded view of the device of Example 3.

[0077] Fig.17 This is a three-dimensional bottom view of the front shell of Example 3.

[0078] Fig.18 It is a three-dimensional top view of the first rotating part of Example 3.

[0079] Fig.19 This is a three-dimensional bottom view of the first rotating part of Example 3.

[0080] Fig. 20 This is a three-dimensional bottom view of the second rotating part of Example 3.

[0081] Fig.21 It is a three-dimensional top view of the second rotating part of Example 3.

[0082] Fig. 22 It is a three-dimensional bottom view of the rear shell body of Example 3.

[0083] Fig.23 It is a three-dimensional side view of the first rotating part of Example 5.

[0084] Fig.24 This is a three-dimensional exploded view of the first rotating part of Example 5.

[0085] Fig.25 It is a three-dimensional side view of the second rotating part of Example 5.

[0086] Fig.26 This is a three-dimensional exploded view of the second rotating part of Example 5.

[0087] Figures 1 to 10 The definitions of the symbols in (Example 1) are as follows:

[0088] 01: mounting bracket; 02: base; 03: mounting shaft; 04: first rotating part;

[0089] 05: second rotating part; 06: motor; 07: gear; 08: one-way bearing;

[0090] 09: bearing seat shell; 101: power transmitting inductor; 102: power receiving inductor;

[0091] 111, 112: magnetic core; 141, 142: photoelectric signal transceiver board; 151: strainable component;

[0092] 161: mounting column; 171: tension spring; 181: limiting slot; 20: material tray;

[0093] 21: Chip taping.

[0094] Figure 11 to Figure 12 The definitions of the symbols in (Example 2) are as follows:

[0095] 02: base part; 04: first rotating part; 05: second rotating part; 07: gear;

[0096] 12: electroluminescent panel; 13: photovoltaic panel; 141, 142: photoelectric signal transceiver board;

[0097] 161: Mounting column.

[0098] Figures 13 to 22 The definitions of the symbols in (Example 3) are as follows:

[0099] 04: first rotating part; 05: second rotating part; 081, 082, 083, 084: bearings;

[0100] 101: power sending inductor; 102: power receiving inductor; 141, 142: photoelectric signal transceiver board;

[0101] 151: flexible member; 161: mounting column; 171: tension spring; 181: limiting groove;

[0102] 30: front housing; 31: power input shaft; 32: rear housing; 33: power output shaft;

[0103] 34: Electrical connection terminal block.

[0104] Figure 23 to Figure 26 The definitions of the symbols in (Example 5) are as follows:

[0105] 04: first rotating part; 05: second rotating part; 50: first housing part; 51: inductor coil;

[0106] 52: inner magnetic core; 53: mounting seat; 54: retaining ring; 55: second housing portion;

[0107] 56: compression spring; 57: external magnetic core. DETAILED DESCRIPTION

[0108] Embodiment 1:

[0109] This embodiment is an application of the technical solution of the present invention to a winding device for chip tape.

[0110] Structure composition:

[0111] See also Figures 1 to 10 :

[0112] A base part 02 is fixedly installed on the mounting bracket 01, and a mounting shaft 03 is vertically fixedly installed in the center hole of the base part 02; an electric energy sending inductor 101, a magnetic core 111 and an optoelectronic signal transceiver board 141 are fixedly installed on the upper surface of the base part 02 and around the mounting shaft 03, the magnetic core 111 is annular and has an annular groove, and the electric energy sending inductor 101 is accommodated in the annular groove of the magnetic core 111; at the right end of the base part 02, a motor 06 is fixedly installed, a gear 07 is sleeved on the power output shaft of the motor 06, and a one-way bearing 08 is sleeved on the end of the power output shaft; a bearing seat is provided on the lower surface of the bearing seat shell part 09, the bearing seat shell part 09 is installed on the right end of the base part 02, and the one-way bearing 08 is embedded and installed in the bearing seat.

[0113] The first rotating part 04 has a mounting hole extending vertically at its center, and is rotatably mounted on a mounting shaft 03 of the base part 02 via its mounting hole. The first rotating part 04 has meshing teeth distributed around its mounting hole, which are dynamically meshed with the gear 07. Due to the difference in diameter between the gear 07 and the first rotating part 04, it acts as a reducer.

[0114] The first rotating part 04 has three limit grooves 181 arranged at equal angles on its upper surface around the mounting hole, and three strain members 151 are installed at equal angles at intervals between the three limit grooves 181, and strain gauges are mounted on the surface of the strain member 151; the first rotating part 04 has an electric energy receiving inductor 102, a magnetic core 112 and an optoelectronic signal transceiver board 142 installed on its lower surface around the mounting hole, the magnetic core 112 is annular and has an annular groove, the electric energy receiving inductor 102 is accommodated in the annular groove of the magnetic core 112, the magnetic core 112 and the optoelectronic signal transceiver board 142 are respectively arranged to face the magnetic core 111 and the optoelectronic signal transceiver board 141 of the base part 02 and have corresponding positions.

[0115] The power transmitting inductor 101 and the power receiving inductor 102 are used to realize non-contact transmission of power from the base part 02 to the first rotating part 04 by electromagnetic coupling; the magnetic core 111 and the magnetic core 112 form a closed magnetic circuit to prevent leakage of electromagnetic signals.

[0116] The photoelectric signal transceiver board 141 and the photoelectric signal transceiver board 142 serve as optical signal transmitting / receiving units for realizing non-contact bidirectional transmission of data signals.

[0117] Since the power transmitting inductor 101, the magnetic core 111 and the optoelectronic signal transceiver board 141 are coaxially arranged with the first rotating part 04, reliable power transmission and signal transfer between the base part 02 and the first rotating part 04 can be ensured no matter to which angle the first rotating part 04 is rotated relative to the base part 02.

[0118] The center of the upper surface of the second rotating part 05 extends upward to form a clamping shaft for loading the tray load, and a mounting hole is provided in the center thereof, and three mounting posts 161 are extended downward around the mounting hole to form the lower surface; the second rotating part 05 is located above the first rotating part 04 and is rotatably mounted on the mounting shaft 03 of the base part 02 through its mounting hole; the three adaptable components 15 of the first rotating part 04 and the three mounting posts 161 of the second rotating part 05 are respectively connected by tension springs 171; the lower ends of the three mounting posts 161 of the second rotating part 05 are respectively movably accommodated in the three limiting grooves 181 of the first rotating part 04, which are used to limit the rotation angle of the second rotating part 05 relative to the first rotating part 04, so as to avoid damage to the tension spring 171 due to the excessive rotation angle. A clamping spring is clamped at the upper end of the mounting shaft 03 to prevent the first rotating part 04 and the second rotating part 05 from withdrawing from the mounting shaft 03.

[0119] The design of three strain components 151 and three tension springs 171 can make the force more stable during operation and provide higher reliability. For example, if one of the strain components 151 or one of the tension springs 171 is damaged, it will not lead to the immediate need to stop the operation, which buys time for maintenance.

[0120] How it works:

[0121] See also Figure 2 The material tray 20 for winding the chip tape 21 is loaded on the upper surface of the second rotating part 05 , and its center hole is engaged with the engaging shaft of the second rotating part 05 .

[0122] The wireless power transmission driving circuit arranged in the base part 02 transmits electric energy to the first rotating part 04 in an electromagnetic coupling manner through the electric energy sending inductor 101. The electric energy receiving inductor 102 arranged in the first rotating part 04 receives the electric energy and converts it into the required voltage through the corresponding circuit device as the power supply of the corresponding circuit device of the first rotating part 04.

[0123] The motor 06 drives the first rotating part 04 to rotate counterclockwise (top view) through the gear 07, and then the first rotating part 04 is dragged to rotate counterclockwise through three strain components 151 and three tension springs 171. The tension of the chip tape 21 as a coil is transmitted to the corresponding strain components 151 through each tension spring 171, and is converted into an electrical signal by the strain gauge mounted on the strain component 151. The electrical signal is detected by the corresponding circuit device arranged in the first rotating part 04 and converted into a digital signal. The digital signal is transmitted to the base part 02 in a non-contact manner through the photoelectric signal transceiver boards 142 and 141. The corresponding circuit device of the base part 02 controls the start and stop and the speed of the motor 06 according to the numerical value provided by the digital signal, so as to realize the control of the tension of the chip tape 21. When the tension reaches a predetermined value, the motor 06 stops outputting power. Since a one-way bearing 08 is connected between the power output shaft of the motor 06 and the bearing seat shell 09, it is ensured that the first rotating part 04 will not be pulled by the tension of the coil to reverse, so the tension output can still be maintained.

[0124] Embodiment 2:

[0125] See also Figure 11 to Figure 12 :

[0126] This embodiment is based on the embodiment 1 and has the following improvements:

[0127] See also Fig.11, located on the upper surface of the base 02, and around the mounting axis 03, an electroluminescent panel 12 is fixedly mounted, and a plurality of LED lamp beads are distributed on the electroluminescent panel 12 as light sources; replacing the power transmitting inductor 101 and the magnetic core 111 in Example 1.

[0128] See also Fig.12 The first rotating part 04 has a photovoltaic panel 13 installed on its lower surface around the installation hole, replacing the power receiving inductor 102 and the magnetic core 112 in Example 1.

[0129] The electroluminescent panel 12 of the base part 02 emits light, and the light is converted into electrical energy by the photovoltaic panel 13 of the first rotating part 04. The electroluminescent panel 12 belongs to the electrical energy sending unit, and the photovoltaic panel 13 belongs to the electrical energy receiving unit, thereby realizing non-contact transmission of electrical energy from the base part 02 to the first rotating part 04 through light radiation.

[0130] The contactless transmission of electrical energy to the first rotating part 04 through optical radiation can significantly reduce the risk of electromagnetic interference.

[0131] Embodiment 3:

[0132] Structure composition:

[0133] See also Figures 13 to 22 :

[0134] The front housing 30 is installed with bearings 081 , 082 , an electric energy transmitting inductor 101 , an optoelectronic signal transceiver board 141 , and an electrical connection terminal seat 34 .

[0135] The outer end surface of the first rotating part 04 extends outward to form a power input shaft 31 , and an electric energy receiving inductor 102 and a photoelectric signal transceiver board 142 are installed around the power input shaft 31 .

[0136] The inner end surface of the first rotating part 04 forms three limiting grooves 181 at equal angles, and three strainable components 151 are installed at equal angles between the three limiting grooves 181, and each strainable component 151 is mounted with a strain gauge.

[0137] The power input shaft 31 of the first rotating part 04 passes through the bearings 081 and 082 of the front housing 30 .

[0138] The rear housing 32 is equipped with bearings 083 and 084 .

[0139] Bearings 081, 082, 083 and 084 are bidirectional bearings and can rotate in both directions.

[0140] The outer end surface of the second rotating part 05 extends outward to form a power output shaft 33 .

[0141] The inner end surface of the second rotating part 05 forms three mounting posts 161 at equal angles.

[0142] The power output shaft 33 of the second rotating part 05 is inserted into the bearings 083 and 084 of the rear housing 32 .

[0143] Tension springs 171 for transmitting power are connected between each adaptable member 151 of the first rotating part 04 and each mounting column 161 of the second rotating part 05 .

[0144] The front housing 30 and the rear housing 32 are installed facing each other and fastened together by bolts, serving as the base part in the technical solution of the present invention.

[0145] The power sending inductor 101 of the front shell 30 and the power receiving inductor 102 of the first rotating part 04 are arranged opposite to each other and have corresponding positions, and are used to realize non-contact transmission of power from the front shell 30 to the first rotating part 04 by electromagnetic coupling. The power is used as the power source of the corresponding circuit device of the first rotating part 04.

[0146] The photoelectric signal transceiver board 141 of the front shell 30 and the photoelectric signal transceiver board 142 of the first rotating part 04 are arranged opposite to each other and have corresponding positions. The photoelectric signal transceiver board 141 and the photoelectric signal transceiver board 142 serve as optical signal transmitting / receiving units for realizing non-contact bidirectional transmission of data signals.

[0147] The electrical connection terminal seat 34 of the front housing 30 is used to provide power for the above-mentioned non-contact power transmission device, and is used to transmit the digital electrical signal received by the optical signal transmitting / receiving unit of the front housing 30 to an external control circuit device.

[0148] Operating principle as a winding device:

[0149] The power input shaft 31 of the first rotating part 04 is connected to an external power source for driving the first rotating part 04 to rotate in a counterclockwise direction (as viewed from the power output shaft 33 end).

[0150] The power source of this embodiment is preferably a servo motor or a brushless motor, and is connected to the power input shaft 31 of the first rotating part 04 through a reduction mechanism. An appropriate reduction ratio can prevent the power input shaft 31 from being pulled to reverse by the tension of the coil when the power output stops, and the reversal will cause a reduction in the tension of the coil.

[0151] In addition, by controlling the driving current of the power source 6 to maintain an appropriate power output torque, it is also possible to prevent the power input shaft 31 from being pulled by the tension of the coil and causing reverse rotation.

[0152] The power output shaft 33 of the second rotating part 05 is connected to the external material roller loaded with the coiled material, so as to drive the material roller to rotate.

[0153] The first rotating part 04 rotates counterclockwise, and through the transmission action of the three adaptable components 151 and the three tension springs 171 , the second rotating part 05 is dragged to rotate counterclockwise.

[0154] The tension of the coil is transmitted to the corresponding strain components 151 through the tension springs 171, and is converted into an electrical signal by the strain gauge mounted on the strain components 151. The electrical signal is detected by the corresponding circuit device arranged in the first rotating part 04 and converted into a digital signal. The digital signal is transmitted to the front shell 30 in a non-contact manner via the optoelectronic signal transceiver boards 142 and 141, and is transmitted to the external control circuit device by the electrical connection terminal seat 34 located in the front shell 30. The control circuit device adjusts the power source according to the numerical value provided by the digital signal to realize the control of the tension of the coil.

[0155] When the tension of the coil is less than a preset value, the material roller loaded with the coil is rotated and accelerated in the same direction as the traveling direction of the coil.

[0156] When the tension of the coil is greater than a preset value, the material roller loaded with the coil is rotated and decelerated in the same direction as the traveling direction of the coil, or even in the opposite direction.

[0157] Operating principle as unwinding device:

[0158] When the tension of the coil is less than a preset value, the material roller loaded with the coil is rotated and decelerated in the same direction as the traveling direction of the coil, or even in the opposite direction.

[0159] When the tension of the coil is greater than a preset value, the material roller loaded with the coil is rotated and accelerated in the same direction as the traveling direction of the coil.

[0160] Embodiment 4:

[0161] This embodiment is based on the embodiment 3 and has the following improvements:

[0162] A photoelectric encoder device is provided, and the photoelectric encoder device serves as a position sensor in the technical solution of the present invention; the photoelectric encoder device includes a code disk and a code reading device, the code disk is fixedly arranged on the second rotating part 05 and is arranged coaxially with the second rotating part 05, the code reading device is arranged on the first rotating part 04, and the angular offset between the second rotating part 05 and the first rotating part 04 is obtained by reading the code value of the code disk, and the angular offset also represents the offset of the relative position. Since the elastic force of the tension spring 171 is constant, the greater the force between the second rotating part 05 and the first rotating part 04, the greater the angular offset, so the angular offset can be used as a basis for obtaining the force between the second rotating part 05 and the first rotating part 04; the photoelectric encoder device and the tension spring 171 together play the role of a force sensor.

[0163] Embodiment 5:

[0164] This embodiment is based on the embodiment 3 and has the following improvements:

[0165] See also Fig.23 , 24 A first housing portion 50 is fixedly mounted on the inner end surface of the first rotating portion 04 , an inductor 51 is fixedly mounted on the inner surface of the first housing portion 50 , and an inner magnetic core 52 is inserted into the inductor 51 .

[0166] See also Fig.25 , 26 The inner end surface of the second rotating part 05 is fixedly mounted with a mounting seat 53, and the second housing part 55 has three ears, which are slidably mounted in the corresponding grooves of the mounting seat 53, so that the second housing part 55 can slide in the mounting seat 53 toward the first housing part 50 of the first rotating part 04. The outer magnetic core 57 is fixedly mounted on the inner surface of the second housing part 55. The compression spring 56 is arranged between the second housing part 55 and the mounting seat 53, and is used to make the second housing part 55 have an elastic force toward the first housing part 50 of the first rotating part 04, so that the end surface of the second housing part 55 can be stably abutted with the end surface of the first housing part 50, so as to avoid the instability of the distance between the outer magnetic core 57 and the inductor 51 in the axial direction, which causes the inductance of the inductor 51 to be superimposed into the error component. The retaining ring 54 is fixedly mounted on the end surface of the mounting seat 53 and blocks the three ears of the second cover shell portion 55 to prevent the second cover shell portion 55 from withdrawing from the mounting seat 53 .

[0167] The above device constitutes an inductive position sensor. As the first rotating part 04 and the second rotating part 05 rotate relative to each other,

[0168] The area of ​​the closed magnetic circuit of the outer magnetic core 57 entering the inductor 51 changes, and the inductance of the inductor 51 also changes accordingly; since the elastic force of the three tension springs connected between the first rotating part 04 and the second rotating part 05 for transmitting power is constant, the angular offset of the relative rotation between the first rotating part 04 and the second rotating part 05 is in a corresponding relationship with the interaction force, and the inductance is in a corresponding relationship with the angular offset. According to the previously calibrated corresponding relationship between the inductance and the interaction force between the first rotating part 04 and the second rotating part 05, the magnitude of the current interaction force between the first rotating part 04 and the second rotating part 05 can be inferred according to the inductance. Therefore, the three tension springs and the above-mentioned inductive position sensor together play the role of a force sensor.

[0169] Summary of the above embodiments:

[0170] (1) The elastic member in the technical solution of the present invention is not limited to the tension spring 171 in the above embodiment. For example, it can also be a coil spring formed in a spiral from the inside to the outside, or a rubber member.

[0171] (2) The wireless power transmission device in the technical solution of the present invention is not limited to the methods of electromagnetic coupling and light radiation in the above embodiments. For example, wireless power transmission can also be achieved by airflow. The power sending unit is provided with an electrically driven fan for generating airflow, and the power receiving unit is provided with a wind receiving device. The wind receiving device is driven by the airflow to rotate and generate power. For another example, wireless power transmission can be achieved by thermal radiation. The power sending unit is provided with an electrically driven heating element, and the power receiving unit is provided with a thermal power generation device. The thermal power generation device can be a semiconductor cooling plate, etc. The temperature difference between the two sides of the semiconductor cooling plate can generate power.

[0172] (3) The adaptable component 151 in the technical solution of the present invention may be an integral structure with the first rotating part 04 or the second rotating part 05 . For example, a part of the main body of the first rotating part 04 or the second rotating part 05 may be constructed as the adaptable component 151 .

Claims

1. A winding and / or unwinding device for facilitating tension control, characterized in that: include: A base part and a rotating part are provided, and the rotating part is rotatably connected to the base part; the rotating part includes a first rotating part for connecting to a power source and capable of rotating relative to the base part, and a second rotating part for loading a load and capable of rotating relative to the base part; the first rotating part is dynamically connected to the second rotating part; the rotating part is provided with a force sensor for detecting the force between the first rotating part and the second rotating part.

2. The winding and / or unwinding device for facilitating tension control according to claim 1, characterized in that: An elastic member for transmitting power is connected between the first rotating part and the second rotating part.

3. The winding and / or unwinding device for facilitating tension control according to claim 2, characterized in that: The force sensor includes a position sensor for detecting a positional relationship between the first rotating part and the second rotating part.

4. The winding and / or unwinding device for facilitating tension control according to claim 1, characterized in that: The force sensor includes a strainable component and a strain gauge, wherein the strainable component is connected to at least one transmission path between the first rotating part and the second rotating part, and the strain gauge is mounted on the strainable component.

5. The winding and / or unwinding device for facilitating tension control according to claim 1, characterized in that: A wireless power transmission device is provided for contactlessly transmitting electric energy to the rotating part. The wireless power transmission device comprises an electric energy transmitting unit and an electric energy receiving unit. The electric energy transmitting unit is arranged on the base part, and the electric energy receiving unit is arranged on the rotating part.

6. The winding and / or unwinding device for facilitating tension control according to claim 5, characterized in that: A power sending inductor and a power receiving inductor are provided for realizing wireless power transmission through electromagnetic coupling. The power sending inductor belongs to the power sending unit, and the power receiving inductor belongs to the power receiving unit.

7. The winding and / or unwinding device for facilitating tension control according to claim 5, characterized in that: An electroluminescent component and a photoelectric power generation component are provided for realizing wireless transmission of electric energy through light radiation. The electroluminescent component belongs to the electric energy sending unit, and the photoelectric power generation component belongs to the electric energy receiving unit.

8. The winding and / or unwinding device for facilitating tension control according to claim 7, characterized in that: The electroluminescent component is an LED.

9. The winding and / or unwinding device for facilitating tension control according to claim 7, characterized in that: The light energy power generation component is a photovoltaic panel.

10. The winding and / or unwinding device for facilitating tension control according to claim 1, characterized in that: An optoelectronic communication device for contactless signal transmission is provided between the rotating part and the base part. The optoelectronic communication device includes an optical signal transmitting unit and an optical signal receiving unit. The optical signal transmitting unit is provided at the rotating part, and the optical signal receiving unit is provided at the base part.

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