Strip caching mechanism and strip feeding device

Abstract

The utility model discloses a strip caching mechanism and a strip feeding device, and belongs to the technical field of photovoltaic cell module production. Wherein the buffer wheel is installed on the guide assembly and can move up and down along the guide assembly, the trigger rod comprises a long rod section extending in the vertical direction, and the trigger rod is configured to move up and down along with the buffer wheel; the lower sensor is arranged close to the lower end of the guide assembly and electrically connected with a control element of the unwinding mechanism. When the long rod section moves downwards along with the buffer wheel, the lower sensor can be triggered from bottom to top, and the control element controls an unwinding motor of the unwinding mechanism to stop unwinding when the lower end of the long rod section triggers the lower sensor. The length of the long rod section is reasonably controlled, enough time can be reserved for overshoot of the unwinding motor, in the whole overshoot process, the buffer wheel can still effectively buffer released strips, and finally it is guaranteed that the tension of the strips is controllable.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cell assembly production, and specifically to a strip buffer mechanism and a strip feeding device. Background Art

[0002] In the production process of photovoltaic modules, the feeding of strips such as welding strips or bus bars is often involved. The strip feeding mechanism usually includes a reeling mechanism and a traction mechanism. The reeling mechanism unwinds the strip material roll through the reeling motor, and the unwound strip is clamped and pulled to the specified position by the traction mechanism. In order to avoid the strip being too tight or too loose due to the mismatch between the traction speed of the traction mechanism and the unwinding speed of the unwinding motor, a strip buffer mechanism is usually set between the reeling mechanism and the traction mechanism.

[0003] The existing strip caching mechanism mainly includes a vertical slide rail and a buffer wheel. A sensor for detecting the low position of the buffer wheel is also arranged on the lower side of the slide rail. When the buffer wheel drops to the low position, the trigger rod installed on the buffer wheel triggers the sensor, and the system controls the unwinding motor to stop based on the trigger signal of the sensor. However, after receiving the stop signal, the conventional unwinding motor itself will have a short overshoot, and at this time the buffer wheel has dropped to the low position, resulting in the strip released during the overshoot process cannot be cached, and the strip tension is out of control. Utility Model Content

[0004] In view of the problem that the conventional strip buffer mechanism mentioned above is prone to cause uncontrolled strip tension when the unwinding motor overshoots, the utility model provides a strip buffer mechanism, and its specific solution is as follows:

[0005] A strip caching mechanism is arranged between an unwinding mechanism and a traction mechanism; the strip caching mechanism at least comprises a buffer wheel, a guide assembly, a trigger rod and a lower sensor, wherein:

[0006] The buffer wheel is installed on the guide assembly, and the buffer wheel can move up and down along the guide assembly. The strip released by the unwinding mechanism passes around the buffer wheel and is clamped by the traction mechanism;

[0007] The trigger rod comprises a long rod section extending in a vertical direction, and the trigger rod is configured to move up and down following the buffer wheel;

[0008] The lower sensor is arranged near the lower end of the guide assembly, and the lower sensor is electrically connected to the control element of the unwinding mechanism;

[0009] When the long rod section moves downward with the buffer wheel, it can trigger the lower sensor from bottom to top, and starting from the lower end of the long rod section triggering the lower sensor, the control element controls the unwinding motor of the unwinding mechanism to stop unwinding.

[0010] The strip caching mechanism of the present application, the trigger rod includes a long rod section extending vertically, the long rod section can trigger the lower sensor from bottom to top, and the unwinding motor can stop from the moment the lower end of the long rod section triggers the lower sensor, and the unwinding motor remains stopped during the entire triggering process of the long rod section. Even if the unwinding motor still overshoots right after it stops, the buffer wheel can still descend to cache the strips released during the overshoot until the entire long rod section completes the triggering of the lower sensor. By reasonably controlling the length of the long rod section, sufficient time can be reserved for the overshoot of the unwinding motor, so that during the entire overshoot process, the buffer wheel can still effectively cache the released strips, ultimately ensuring that the tension of the strip is controllable.

[0011] In some embodiments, the length of the long rod section is 50-100 mm.

[0012] By setting the length of the long rod section within the above-mentioned numerical range, sufficient time can be reserved for the overshoot of the unwinding motor.

[0013] In some embodiments, the trigger rod further includes a short rod section, which is horizontally arranged, one end of the short rod section is fixedly connected to the upper end of the long rod section, and the other end of the short rod section is mounted on the buffer wheel.

[0014] The long rod section can be arranged vertically through the short rod section arranged horizontally and connected with the buffer wheel through the short rod section, so that the long rod section can move up and down following the buffer wheel.

[0015] In some embodiments, the strip cache mechanism also includes an upper sensor, which is arranged near the upper end of the guide assembly. When the trigger rod moves upward with the buffer wheel, it can trigger the upper sensor. The control element controls the unwinding motor of the unwinding mechanism to accelerate the unwinding based on the trigger signal of the upper sensor.

[0016] Through the upper sensor that is set, when the buffer wheel moves up along the guide assembly and triggers the upper sensor, the control element receives the trigger signal from the upper sensor to control the unwinding motor of the unwinding mechanism to accelerate the unwinding, thereby ensuring that the tension of the strip is controllable.

[0017] In some embodiments, both the upper sensor and the lower sensor are photoelectric sensors.

[0018] The optical signal is converted into an electrical signal by the upper sensor and the lower sensor, and the electrical signal is transmitted to the control element, thereby controlling the operating speed of the unwinding motor in the unwinding mechanism to ensure that the tension of the strip is controllable.

[0019] In some embodiments, the guide assembly includes a vertically arranged slide rail, the buffer wheel is slidably mounted on the slide rail via a slider, and the trigger rod is fixedly mounted on the slider.

[0020] A specific structure of a guide component is provided, which has a simple structure, is easy to implement and has a low cost.

[0021] In some embodiments, a counterweight is mounted on the buffer wheel.

[0022] A downward force is applied to the buffer wheel by the counterweight, so that the belt passing through the buffer wheel is kept in tension.

[0023] In some embodiments, the strip caching mechanism also includes a first guide wheel and a second guide wheel, wherein: the first guide wheel and the second guide wheel are respectively arranged on both sides of the buffer wheel and located above the buffer wheel; the strip released by the unwinding mechanism passes around the first guide wheel, the buffer wheel and the second guide wheel in turn and is clamped by the traction mechanism.

[0024] The first guide wheel and the second guide wheel can cooperate with the buffer wheel to achieve smooth caching of the strip.

[0025] The present application also provides a strip feeding device, including the strip buffer mechanism shown above.

[0026] By installing the strip buffer mechanism shown above in the feeding device, sufficient time can be reserved for the unwinding motor to overshoot after it stops rotating, so that the buffer wheel can still effectively buffer the released strip during the entire overshoot process, ensuring that the tension of the strip is controllable.

[0027] In some embodiments, the strip feeding device also includes a unwinding mechanism and a pressing mechanism, a cutting mechanism and a traction mechanism arranged in sequence, wherein: the unwinding mechanism is used to release the strip from the roll; the strip passes through the strip buffering mechanism, the pressing mechanism and the cutting mechanism in sequence and is then clamped and pulled by the traction mechanism; the strip buffering mechanism is used to buffer the strip; the pressing mechanism is used to press the strip; and the cutting mechanism is used to cut the strip.

[0028] By sequentially arranging the unwinding mechanism, the pressing mechanism, the cutting mechanism and the pulling mechanism, a strip of a required length can be automatically prepared. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the strip feeding device in this application.

[0030] Figure 2 This is a schematic diagram of the structure of the stripe cache mechanism in this application.

[0031] Reference numerals;

[0032] 1. Unwinding mechanism;

[0033] 2. Stripe cache mechanism;

[0034] 21. Lower sensor; 22. Trigger rod; 221. Short rod section; 222. Long rod section; 23. Buffer wheel; 24. Guide assembly; 241. Sliding block; 242. Sliding rail; 25. Upper sensor;

[0035] 26. First guide wheel; 27. Second guide wheel; 28. Counterweight. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] like Figure 1 and Figure 2 As shown, the strip buffer mechanism 2 of the present application is arranged between the unwinding mechanism 1 and the traction mechanism ( Figure 1 The strip buffer mechanism 2 at least comprises a buffer wheel 23, a guide assembly 24, a trigger rod 22 and a lower sensor 21, wherein:

[0038] The buffer wheel 23 is installed on the guide assembly 24. The buffer wheel 23 can move up and down along the guide assembly 24. The strip released by the unwinding mechanism 1 passes around the buffer wheel 23 and is clamped by the traction mechanism.

[0039] The trigger rod 22 includes a long rod section 222 extending vertically, and the trigger rod 22 is configured to move up and down following the buffer wheel 23;

[0040] The lower sensor 21 is disposed near the lower end of the guide assembly 24, and the lower sensor 21 is electrically connected to the control element of the unwinding mechanism 1;

[0041] When the long rod section 222 moves downward with the buffer wheel 23, it can trigger the lower sensor 21 from bottom to top, and starting from the lower end of the long rod section 222 triggering the lower sensor 21, the control element controls the unwinding motor of the unwinding mechanism 1 to stop unwinding.

[0042] The strip caching mechanism 2 of the present application, the trigger rod 22 includes a long rod section 222 extending vertically, and the long rod section 222 can trigger the lower sensor 21 from bottom to top. From the moment the lower end of the long rod section 222 triggers the lower sensor 21, the unwinding motor can stop, and the unwinding motor remains stopped during the entire triggering process of the long rod section 222. Even if the unwinding motor still has an overshoot after it stops at the beginning, the buffer wheel 23 can still descend to cache the busbar released during the overshoot until the entire long rod section 222 completes the triggering of the lower sensor 21. By reasonably controlling the length of the long rod section 222, sufficient time can be reserved for the overshoot of the unwinding motor, so that during the entire overshoot process, the buffer wheel 23 can still effectively cache the released strip, and ultimately ensure that the tension of the strip is controllable.

[0043] Optionally, the length of the long rod section 222 is 50 mm-100 mm, which can reserve enough time for the overshoot of the unwinding motor.

[0044] As a preferred embodiment, the length of the long rod section 222 is 60 mm. The triggering process of the long rod section 222 at this length can reserve sufficient overshoot time for most unwinding motors.

[0045] Optionally, the trigger rod 22 further includes a short rod segment 221 , which is horizontally arranged, one end of the short rod segment 221 is fixedly connected to the upper end of the long rod segment 222 , and the other end of the short rod segment 221 is mounted on the buffer wheel 23 .

[0046] The short rod section 221 is arranged horizontally, so that the long rod section 222 can be arranged vertically and the long rod section 222 is connected to the buffer wheel 23 through the short rod section 221 , so that the long rod section 222 can move up and down following the buffer wheel 23 .

[0047] Continue to refer Figure 2 Optionally, the strip cache mechanism 2 also includes an upper sensor 25, which is arranged near the upper end of the guide assembly 24. When the trigger rod 22 moves upward with the buffer wheel 23, it can trigger the upper sensor 25. The control element controls the unwinding motor of the unwinding mechanism 1 to accelerate the unwinding based on the trigger signal of the upper sensor 25.

[0048] Optionally, both the upper sensor 25 and the lower sensor 21 are photoelectric sensors, which convert optical signals into electrical signals and transmit the electrical signals to the control element, thereby controlling the operating speed of the unwinding motor in the unwinding mechanism 1 to ensure that the tension of the strip is controllable.

[0049] The upper sensor 25 is set so that when the buffer wheel 23 moves upward along the guide assembly 24 and triggers the upper sensor 25, the control element receives the trigger signal from the upper sensor 25 to control the unwinding motor of the unwinding mechanism 1 to accelerate the unwinding, thereby ensuring that the tension of the strip is controllable.

[0050] Optionally, the guide assembly 24 includes a vertically arranged slide rail 242, the buffer wheel 23 is slidably installed on the slide rail 242 through a slider 241, and the trigger rod 22 is fixedly installed on the slider 241. Through the guide assembly 24, the buffer wheel 23 and the trigger rod 22 can move up and down on the slide rail 242 along with the slider 241, so that the buffer wheel 23 can cache the released strips.

[0051] It should be noted that the guide component 24 includes but is not limited to the above-mentioned structure. For example, the guide component 24 can also adopt the sliding cooperation form of the guide rail and the roller, the sliding cooperation form of the guide groove and the slider, the sliding cooperation form of the guide column and the guide sleeve, etc., as long as the buffer wheel 23 can be moved up and down, the released strips can be cached.

[0052] Optionally, a counterweight 28 is installed on the buffer wheel 23 , and the counterweight 28 can increase the weight of the buffer wheel 23 , so that the belt passing through the buffer wheel 23 maintains tension.

[0053] like Figure 1 As shown, the strip caching mechanism 2 also includes a first guide wheel 26 and a second guide wheel 27, and the first guide wheel 26 and the second guide wheel 27 are respectively arranged on both sides of the buffer wheel 23 and are located above the buffer wheel 23; the strip released by the unwinding mechanism 1 successively passes around the first guide wheel 26, the buffer wheel 23 and the second guide wheel 27 and is clamped by the traction mechanism, and the first guide wheel 26 and the second guide wheel 27 can cooperate with the buffer wheel 21 to achieve smooth caching of the strip.

[0054] The specific working process of the stripe cache mechanism 2 is as follows:

[0055] The strip released by the unwinding mechanism 1 passes through the first guide wheel 26, the buffer wheel 23 and the second guide wheel 27 in sequence and is clamped by the traction mechanism. In the process of the traction mechanism pulling the strip, the buffer wheel 23 can move up and down along the slide rail 242 with the slider 241. When the trigger rod 22 on the buffer wheel 23 triggers the upper sensor 25, the control element receives the signal from the upper sensor 25 and controls the unwinding motor to accelerate the unwinding, so that the strip can be released faster and the tension of the strip is reduced, so that the buffer wheel 23 can cache the released strip.

[0056] When the lower end of the long rod section 222 of the trigger rod 22 on the buffer wheel 23 passes through and triggers the lower sensor 21, the control element receives the signal from the lower sensor 21 and stops the unwinding motor from unwinding until the long rod section 222 completes the entire triggering process, so that the buffer wheel 23 can descend to cache the strip released during the overshoot process, ensuring that the tension of the strip is controllable.

[0057] The present application also provides a strip feeding device, comprising a reeling mechanism 1, the strip caching mechanism 2 shown above, a pressing mechanism, a cutting mechanism and a traction mechanism which are arranged in sequence, wherein: the reeling mechanism 1 is used to release the strip from the material roll; the strip passes through the strip caching mechanism 2, the pressing mechanism and the cutting mechanism in sequence and is clamped and pulled by the traction mechanism; the strip caching mechanism 2 is used to cache the strip; the pressing mechanism is used to press the strip; and the cutting mechanism is used to cut the strip.

[0058] The strip feeding device in the present application can reserve enough time for the unwinding motor to overshoot after it stops by installing the strip buffer mechanism 2 shown above, so that the buffer wheel 23 can still effectively buffer the released strip during the entire overshoot process, ensuring that the tension of the strip is controllable.

[0059] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A stripe cache mechanism, characterized in that: The strip buffer mechanism is arranged between the unwinding mechanism and the traction mechanism; the strip buffer mechanism at least comprises a buffer wheel, a guide assembly, a trigger rod and a lower sensor, wherein: The buffer wheel is installed on the guide assembly, and the buffer wheel can move up and down along the guide assembly. The strip released by the unwinding mechanism passes around the buffer wheel and is clamped by the traction mechanism; The trigger rod comprises a long rod section extending in a vertical direction, and the trigger rod is configured to move up and down following the buffer wheel; The lower sensor is arranged near the lower end of the guide assembly, and the lower sensor is electrically connected to the control element of the unwinding mechanism; When the long rod section moves downward with the buffer wheel, it can trigger the lower sensor from bottom to top, and starting from the lower end of the long rod section triggering the lower sensor, the control element controls the unwinding motor of the unwinding mechanism to stop unwinding.

2. The stripe cache mechanism according to claim 1, characterized in that: The length of the long rod section is 50mm-100mm.

3. The stripe cache mechanism according to claim 1, characterized in that: The trigger rod also includes a short rod section, which is horizontally arranged. One end of the short rod section is fixedly connected to the upper end of the long rod section, and the other end of the short rod section is installed on the buffer wheel.

4. The stripe cache mechanism according to claim 1, characterized in that: The strip caching mechanism also includes an upper sensor, which is arranged near the upper end of the guide assembly. When the trigger rod moves upward with the buffer wheel, it can trigger the upper sensor. The control element controls the unwinding motor of the unwinding mechanism to accelerate unwinding based on the trigger signal of the upper sensor.

5. The stripe cache mechanism according to claim 4, characterized in that: The upper sensor and the lower sensor are both photoelectric sensors.

6. The stripe cache mechanism according to claim 1, characterized in that: The guide assembly comprises a vertically arranged slide rail, the buffer wheel is slidably mounted on the slide rail via a slider, and the trigger rod is fixedly mounted on the slider.

7. The stripe cache mechanism according to claim 1, characterized in that: A counterweight is installed on the buffer wheel.

8. The stripe cache mechanism according to claim 1, characterized in that: The stripe caching mechanism further comprises a first guide wheel and a second guide wheel, wherein: The first guide wheel and the second guide wheel are respectively arranged on both sides of the buffer wheel and located above the buffer wheel; The strip released by the unwinding mechanism passes around the first guide wheel, the buffer wheel and the second guide wheel in sequence and is clamped by the traction mechanism.

9. A strip feeding device, characterized in that: The strip feeding device comprises the strip caching mechanism as described in any one of claims 1 to 8.

10. The strip feeding device according to claim 9, characterized in that: The strip feeding device also includes an unwinding mechanism and a pressing mechanism, a cutting mechanism and a pulling mechanism which are arranged in sequence, wherein: The unwinding mechanism is used to unwind the strip from the roll; The strip is clamped and pulled by the pulling mechanism after passing through the strip buffer mechanism, the pressing mechanism and the cutting mechanism in sequence; The stripe cache mechanism is used to cache the stripes; The pressing mechanism is used to press the strip; The cutting mechanism is used to cut the strip.

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