Automatic damping size adjusting system and method for rotating disc of net feather badminton racket stringing machine

Abstract

This invention discloses an automatic damping adjustment system and method for a tennis, badminton, and squash racket stringing machine turntable. The invention relates to the technical field of adjusting the damping between the turntable and a hollow fixed column. An electromagnetic block (6) is fixed to the top surface of a base (1) inside the hollow fixed column (2). The electromagnetic block (6) is connected to a current adjustment module (7), which is connected to a controller (8). An angle sensor (9) is fixed to the top surface of the base (1). The input shaft of the angle sensor (9) faces upwards, and an encoding wheel (10) is fixed to its extension end. The outer cylindrical surface of the encoding wheel (10) contacts the outer cylindrical surface of the turntable (4). The angle sensor (9) is in contact with the controller (8). The beneficial effects of this invention are: effectively preventing the turntable from shaking randomly during racket stringing and improving the quality of racket stringing.

Description

Technical Field

[0001] This invention relates to the technical field of adjusting the damping between the turntable and the hollow fixed column, and in particular to an automatic damping adjustment system and method for the turntable of a tennis, badminton, and squash racket stringing machine. Background Technology

[0002] A tennis, badminton, and squash racket stringing machine can string elastic strings into different types of rackets (including tennis rackets, badminton rackets, and squash rackets) to create a grid-like distribution of the elastic strings. The structure of a certain existing tennis, badminton, and squash racket stringing machine is as follows: Figures 1-2 As shown, it includes a base 1, a hollow fixing column 2 fixed on the top surface of the base 1, a ball bearing 3 fixed on the outside of the hollow fixing column 2, a turntable 4 set directly above the hollow fixing column 2, a sleeve 5 fixed on the bottom surface of the turntable 4, the sleeve 5 being fitted onto the outer ring of the ball bearing 3, and a racket mounting mechanism for mounting the racket fixed on the top surface of the turntable 4.

[0003] The method by which workers use the existing tennis, badminton, and squash racket stringing machine to thread a grid-like elastic string inside the racket is as follows:

[0004] S1. A worker takes out a racket and uses a racket holder to fix the racket on it. At this time, the racket is in a horizontal position.

[0005] S2. The worker manually turns the turntable 4 so that the turntable 4 rotates on the horizontal plane relative to the central axis of the hollow fixed column 2. The turntable 4 drives the racket mechanism and racket on it to rotate synchronously on the horizontal plane. When the worker feels that the racket has rotated to a suitable operating position, the worker can thread the first elastic string inside the racket.

[0006] S3. The worker repeats step S2 multiple times to thread multiple elastic threads inside the racket, thus creating a grid-like pattern of elastic threads inside the racket, resulting in a usable finished racket.

[0007] However, while this existing tennis, badminton, and squash racket stringing machine can thread a mesh-like elastic string inside the racket, it still has the following technical shortcomings:

[0008] In step S2, when the worker rotates the racket to a suitable operating position and threads the elastic string inside the racket, the turntable 4 can rotate freely on the horizontal plane relative to the central axis of the hollow fixed column 2. Therefore, the reaction force generated during the threading process causes the turntable 4 to shake randomly, which in turn causes the racket to shake randomly. This makes it difficult for the worker to thread the elastic string smoothly inside the racket, thereby reducing the quality of the stringing.

[0009] Therefore, there is an urgent need for an automatic damping adjustment system and method to effectively prevent the turntable from shaking randomly during racket stringing and to improve the quality of racket stringing. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic damping adjustment system and method for the turntable of a tennis, badminton, and squash racket stringing machine.

[0011] The objective of this invention is achieved through the following technical solution: an automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine. The tennis, badminton, and squash racket stringing machine includes a base, a hollow fixed column fixed to the top surface of the base, a ball bearing fixed to the outside of the hollow fixed column, a turntable positioned directly above the hollow fixed column, a sleeve fixed to the bottom surface of the turntable and fitted onto the outer ring of the ball bearing, a racket mounting mechanism fixed to the top surface of the turntable, an electromagnetic block fixed to the top surface of the base inside the hollow fixed column, the electromagnetic block being connected to a current adjustment module, the current adjustment module being connected to a controller, an angle sensor fixed to the top surface of the base, an encoding wheel fixed to the upward-facing input shaft of the angle sensor and the outer cylindrical surface of the encoding wheel contacting the outer cylindrical surface of the turntable, and the angle sensor contacting the controller.

[0012] The hollow fixing column, sleeve, and turntable are arranged coaxially.

[0013] The height of the electromagnetic block is less than the height of the hollow fixed column.

[0014] The current regulating module and the controller are fixed on the top surface of the base. The current regulating module is connected to the electromagnetic block via signal line A, and the current regulating module is connected to the controller via signal line B.

[0015] A radial through hole is provided in the side wall of the hollow fixed column, and the signal line A passes through the radial through hole and is connected to the current adjustment module.

[0016] The controller is also connected to a power module, which supplies power to the controller, angle sensor and current adjustment module. When the current adjustment module supplies power to the electromagnetic block, damping is formed between the turntable and the hollow fixed column.

[0017] A method for automatically adjusting the damping of the turntable in a tennis, badminton, or squash racket stringing machine, comprising the following steps:

[0018] S1. A worker takes out a racket and uses a racket holder to fix the racket on it. At this time, the racket is in a horizontal position.

[0019] S2. The worker manually rotates the turntable to make it rotate on the horizontal plane relative to the central axis of the hollow fixed column. The turntable drives the racket mechanism and racket on it to rotate synchronously on the horizontal plane. At the same time, the turntable also drives the encoder wheel to rotate synchronously. The encoder wheel drives the input shaft of the angle sensor to rotate synchronously. The angle sensor monitors the angle of the turntable in real time and converts the turntable angle into an electrical signal and transmits it to the controller.

[0020] If the controller does not receive an electrical signal within 3 seconds, it means that the worker has rotated the racket to his / her suitable operating position. At this time, the controller resets the angle sensor to zero. At the same time, the controller sends a signal to the current adjustment module to increase the current supplied to the electromagnetic block. When the current entering the electromagnetic block increases, the damping between the turntable and the hollow fixed column also increases accordingly, which makes it easier for the worker to thread the elastic string inside the racket.

[0021] S3. When the worker wants to change the position of the racket again, the worker manually turns the turntable to overcome the damping between the turntable and the hollow fixed post. The turntable drives the racket and the encoder wheel to rotate synchronously. The encoder wheel drives the input shaft of the angle sensor to rotate synchronously. The angle sensor sends an electrical signal to the controller again. When the controller receives the electrical signal from the angle sensor again, it means that the worker is rotating the racket to the next operating position. At this time, the controller sends an electrical signal to the current adjustment module to reduce the current supplied to the electromagnetic block. When the current of the electromagnetic block decreases, the damping between the turntable and the hollow fixed post also decreases accordingly, thereby ensuring that the worker can turn the turntable more easily and quickly, and thus make the racket rotate to the next operating position more quickly.

[0022] S4. Workers repeat steps S2 to S3 multiple times to thread multiple elastic threads inside the racket, ultimately creating a grid-like pattern of elastic threads and obtaining a usable finished racket.

[0023] The present invention has the following advantages: it effectively avoids the turntable from shaking randomly during the racket stringing process and improves the quality of racket stringing. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of a prior art stringing machine for tennis, badminton, and squash rackets.

[0025] Figure 2 for Figure 1 Top view;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention;

[0027] Figure 4 for Figure 3 Top view;

[0028] Figure 5 To remove Figure 3 A schematic diagram of the turntable and ball bearings in the diagram;

[0029] Figure 6 for Figure 5 Top view;

[0030] Figure 7 This is a schematic diagram showing the connection between the angle sensor and the encoder wheel of the present invention;

[0031] Figure 8 for Figure 7 Top view;

[0032] Figure 9 This is a physical illustration of the present invention;

[0033] In the picture:

[0034] 1-Base, 2-Hollow fixing column, 3-Ball bearing, 4-Turntable, 5-Sleeve, 6-Electromagnetic block, 7-Current adjustment module, 8-Controller, 9-Angle sensor, 10-Encoder wheel, 11-Signal line A, 12-Signal line B, 13-Radial wire hole. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0036] like Figures 3-8 As shown, an automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine is disclosed. The tennis, badminton, and squash racket stringing machine includes a base 1, a hollow fixed column 2 fixed on the top surface of the base 1, a ball bearing 3 fixed on the outside of the hollow fixed column 2, a turntable 4 arranged directly above the hollow fixed column 2, and a sleeve 5 fixed on the bottom surface of the turntable 4. The sleeve 5 is fitted onto the outer ring of the ball bearing 3. The hollow fixed column 2, the sleeve 5, and the turntable 4 are coaxially arranged. A racket mounting mechanism for mounting rackets is fixed on the top surface of the turntable 4. An electromagnetic block 6 is fixed on the top surface of the base 1 inside the hollow fixed column 2. The height of the electromagnetic block 6 is less than the height of the hollow fixed column 2. The electromagnetic block 6 is connected to the current adjustment module 7, which is connected to the controller 8. An angle sensor 9 is fixed on the top surface of the base 1. The input shaft of the angle sensor 9 faces upward and an encoding wheel 10 is fixed on its extension end. The outer cylindrical surface of the encoding wheel 10 is in contact with the outer cylindrical surface of the turntable 4. The angle sensor 9 is in contact with the controller 8.

[0037] The current regulating module 7 and the controller 8 are fixed on the top surface of the base 1. The current regulating module 7 is connected to the electromagnetic block 6 via signal line A11, and the current regulating module 7 is connected to the controller 8 via signal line B12. A radial through hole 13 is provided in the side wall of the hollow fixed column 2, and the signal line A11 passes through the radial through hole 13 and is connected to the current regulating module 7.

[0038] The controller 8 is also connected to the power module, which supplies power to the controller 8, the angle sensor 9 and the current adjustment module 7. When the current adjustment module 7 supplies power to the electromagnetic block 6, a damping is formed between the turntable 4 and the hollow fixed column 2.

[0039] A method for automatically adjusting the damping of the turntable in a tennis, badminton, or squash racket stringing machine, comprising the following steps:

[0040] S1. A worker takes out a racket and uses a racket holder to fix the racket on it. At this time, the racket is in a horizontal position.

[0041] S2. The worker manually rotates the turntable 4 so that the turntable 4 rotates on the horizontal plane relative to the central axis of the hollow fixed column 2. The turntable 4 drives the racket mechanism and racket on it to rotate synchronously on the horizontal plane. At the same time, the turntable 4 also drives the encoder wheel 10 to rotate synchronously. The encoder wheel 10 drives the input shaft of the angle sensor 9 to rotate synchronously. The angle sensor 9 monitors the angle of the turntable 4 in real time and converts the angle of the turntable 4 into an electrical signal and transmits it to the controller 8.

[0042] If the controller 8 does not receive an electrical signal within 3 seconds, it means that the worker has rotated the racket to his suitable operating position. At this time, the controller 8 resets the angle sensor 9 to zero. At the same time, the controller 8 sends a signal to the current adjustment module 7 to increase the current supplied to the electromagnetic block 6. When the current entering the electromagnetic block 6 increases, the damping between the turntable 4 and the hollow fixed column 2 also increases accordingly, which makes it easier for the worker to thread the elastic string inside the racket.

[0043] S3. When the worker wants to change the position of the racket again, the worker manually moves the turntable 4 to overcome the damping between the turntable 4 and the hollow fixed column 2. The turntable 4 drives the racket and the encoder wheel 10 to rotate synchronously. The encoder wheel 10 drives the input shaft of the angle sensor 9 to rotate synchronously. The angle sensor 9 sends an electrical signal to the controller 8 again. When the controller 8 receives the electrical signal from the angle sensor 9 again, it means that the worker is rotating the racket to the next operating position. At this time, the controller 8 sends an electrical signal to the current adjustment module 7 to reduce the current supplied to the electromagnetic block 6. When the current of the electromagnetic block 6 decreases, the damping between the turntable 4 and the hollow fixed column 2 also decreases accordingly, thereby ensuring that the worker can move the turntable 4 more easily and quickly, and thus make the racket rotate to the next operating position more quickly.

[0044] S4. Workers repeat steps S2 to S3 multiple times to thread multiple elastic threads inside the racket, ultimately creating a grid-like pattern of elastic threads and obtaining a usable finished racket.

[0045] In step S2, when the worker has rotated the racket to their preferred operating position, the current adjustment module 7 automatically increases the current supplied to the electromagnetic block 6, thereby automatically increasing the damping between the turntable 4 and the hollow fixed column 2. This effectively prevents the reaction force generated during the worker threading the elastic string into the racket, thus avoiding the turntable 4 from wobbling and preventing the racket from wobbling. Therefore, this automatic damping adjustment system, compared to existing technologies, significantly improves performance. Figures 1-2 The tennis, badminton, and squash racket stringing machine shown not only ensures that workers can smoothly string elastic strings into the rackets, but also improves the quality of stringing.

[0046] Furthermore, in step S3, when the worker needs to change the position of the racket again, the worker only needs to turn the turntable 4 so that the turntable 4 overcomes the damping between the turntable 4 and the hollow fixed post 2. When the controller 8 receives the electrical signal from the angle sensor 9 again, the current adjustment module 7 can automatically reduce the current supplied to the electromagnetic block 6, thereby automatically increasing the damping between the turntable 4 and the hollow fixed post 2, thus ensuring that the worker can turn the turntable 4 more easily and quickly, and thus make the racket rotate to the next operating position more quickly, thereby realizing the completion of threading the elastic string into the racket in a short time, and thus improving the efficiency of threading the elastic string into the racket.

[0047] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine, the tennis, badminton, and squash racket stringing machine comprising a base (1), a hollow fixed column (2) fixed on the top surface of the base (1), a ball bearing (3) fixed on the outside of the hollow fixed column (2), a turntable (4) disposed directly above the hollow fixed column (2), a sleeve (5) fixed on the bottom surface of the turntable (4), the sleeve (5) being fitted onto the outer ring of the ball bearing (3), and a racket mounting mechanism for mounting rackets fixed on the top surface of the turntable (4), characterized in that: The hollow fixed column (2) is provided with an electromagnetic block (6) fixed on the top surface of the base (1). The electromagnetic block (6) is connected to the current adjustment module (7). The current adjustment module (7) is connected to the controller (8). An angle sensor (9) is fixed on the top surface of the base (1). The input shaft of the angle sensor (9) faces upward and an encoding wheel (10) is fixed on its extension end. The outer cylindrical surface of the encoding wheel (10) is in contact with the outer cylindrical surface of the turntable (4). The angle sensor (9) is in contact with the controller (8).

2. The automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine according to claim 1, characterized in that: The hollow fixed column (2), sleeve (5) and turntable (4) are coaxially arranged.

3. The automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine according to claim 2, characterized in that: The height of the electromagnetic block (6) is less than the height of the hollow fixed column (2).

4. The automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine according to claim 3, characterized in that: The current regulating module (7) and the controller (8) are fixed on the top surface of the base (1). The current regulating module (7) is connected to the electromagnetic block (6) via signal line A (11), and the current regulating module (7) is connected to the controller (8) via signal line B (12).

5. The automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine according to claim 4, characterized in that: The hollow fixed column (2) has a radial through hole (13) in its side wall. The signal line A (11) passes through the radial through hole (13) and is connected to the current adjustment module (7).

6. The automatic damping adjustment system for the turntable of a tennis, badminton, and squash racket stringing machine according to claim 5, characterized in that: The controller (8) is also connected to the power supply module, which supplies power to the controller (8), the angle sensor (9) and the current adjustment module (7). When the current adjustment module (7) supplies power to the electromagnetic block (6), a damping is formed between the turntable (4) and the hollow fixed column (2).

7. A method for automatically adjusting the damping of a stringing machine turntable for tennis, badminton, and squash rackets, employing the automatic damping adjustment system for the stringing machine turntable of a tennis, badminton, and squash racket as described in claim 6, characterized in that: It includes the following steps: S1. A worker takes out a racket and uses a racket holder to fix the racket on it. At this time, the racket is in a horizontal position. S2. The worker manually moves the turntable (4) so ​​that the turntable (4) rotates on the horizontal plane relative to the central axis of the hollow fixed column (2). The turntable (4) drives the racket mechanism and racket on it to rotate synchronously on the horizontal plane. At the same time, the turntable (4) also drives the encoder wheel (10) to rotate synchronously. The encoder wheel (10) drives the input shaft of the angle sensor (9) to rotate synchronously. The angle sensor (9) monitors the angle of the turntable (4) in real time and converts the angle of the turntable (4) into an electrical signal and transmits it to the controller (8). If the controller (8) does not receive an electrical signal within 3 seconds, it means that the worker has rotated the racket to his suitable operating position. At this time, the controller (8) resets the angle sensor (9) to zero. At the same time, the controller (8) sends a signal to the current adjustment module (7) to increase the current supplied to the electromagnetic block (6). When the current entering the electromagnetic block (6) increases, the damping between the turntable (4) and the hollow fixed column (2) also increases accordingly, which is more conducive to the worker threading the elastic string inside the racket. S3. When the worker wants to change the position of the racket again, the worker manually moves the turntable (4) so ​​that the turntable (4) overcomes the damping between the turntable (4) and the hollow fixed column (2). The turntable (4) drives the racket and the encoder wheel (10) to rotate synchronously. The encoder wheel (10) drives the input shaft of the angle sensor (9) to rotate synchronously. The angle sensor (9) sends an electrical signal to the controller (8) again. When the controller (8) receives the electrical signal from the angle sensor (9) again, it means that the worker is rotating the racket to the next operating position. At this time, the controller (8) sends an electrical signal to the current adjustment module (7) so that the current adjustment module (7) reduces the current supplied to the electromagnetic block (6). When the current of the electromagnetic block (6) decreases, the damping between the turntable (4) and the hollow fixed column (2) also decreases accordingly, thereby ensuring that the worker can move the turntable (4) more easily and quickly, and thus make the racket rotate to the next operating position more quickly. S4. Workers repeat steps S2 to S3 multiple times to thread multiple elastic threads inside the racket, ultimately creating a grid-like pattern of elastic threads and obtaining a usable finished racket.

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