Electronic hand wheel for sewing machine

Abstract

The application relates to the field of sewing machine hand wheels, in particular to a sewing machine electronic hand wheel which comprises a mounting plate, a hand wheel, a circuit board, a magnet and a Hall sensor, the hand wheel and the circuit board are respectively arranged on the two sides of the mounting plate, the hand wheel is rotationally connected to the mounting plate around an own axis, the circuit board is fixedly connected to the mounting plate through a fixing piece, the magnet is fixedly connected to the hand wheel, and the Hall sensor is fixedly connected to the circuit board, and the circuit board is used for electrically connecting a main shaft motor. The operation of the mechanical hand wheel is converted into an electronic signal which can be recognized by the circuit board, so that the main shaft motor is started and controlled in a synchronous mode through an electric control mode, the problem that a great transmission resistance needs to be overcome and the operation is laborious in the traditional mechanical hand wheel is overcome, meanwhile, electronic decoupling of man-machine operation and motor driving is realized, and the operation efficiency of a user is improved.

Description

Technical Field

[0001] This application relates to the field of sewing machine handwheels, and more particularly to an electronic handwheel for sewing machines. Background Technology

[0002] In industrial sewing equipment, the handwheel is a crucial human-machine interface component. Its main function is to allow the operator to manually and precisely fine-tune the machine's spindle or motion axis to ensure that the needle is in the correct position at the right time to complete a perfect stitch.

[0003] Traditional handwheels employ a purely mechanical design. When the operator needs to make fine adjustments, they physically rotate the handwheel. The rotational motion of the handwheel is then converted into the rotation of the machine's main shaft through a gear set or direct drive, thereby driving the movement of actuators such as the needle bar and feed dog.

[0004] However, the operator needs to overcome the static friction and inertial force of the entire transmission system (including the spindle, gears, shuttle, etc.) to turn the handwheel. For large equipment or poorly maintained machines, the resistance is huge, and long-term operation can easily lead to operator fatigue and low efficiency. Utility Model Content

[0005] To improve user operating efficiency, this application provides an electronic handwheel for a sewing machine.

[0006] The electronic handwheel for a sewing machine provided in this application adopts the following technical solution: An electronic handwheel for a sewing machine includes a mounting plate, a handwheel, a circuit board, a magnet, and a Hall sensor. The handwheel and the circuit board are respectively disposed on both sides of the mounting plate. The handwheel is rotatably connected to the mounting plate around its own axis. The circuit board is fixedly connected to the mounting plate by a fastener. The magnet is fixedly connected to the handwheel. The Hall sensor is fixedly connected to the circuit board. The circuit board is used for electrical connection to the spindle motor.

[0007] By adopting the above technical solution, the operation of the robotic handwheel is converted into electronic signals that can be recognized by the circuit board. This allows for easy and precise start-up and control of the spindle motor through electronic control, overcoming the problems of huge transmission resistance and laborious operation that traditional robotic handwheels require. At the same time, it achieves electronic decoupling between human-machine operation and motor drive, improving the user's operating efficiency.

[0008] Preferably, the fixing component includes a positioning seat and a support column. The positioning seat is fixedly connected to the mounting plate, one end of the support column is fixedly connected to the positioning seat, and the other end of the support column is fixedly connected to the circuit board.

[0009] By adopting the above technical solution, the fixed structure composed of the positioning seat and the support column realizes the precise positioning and stable support of the circuit board relative to the mounting plate, effectively ensuring the accuracy and consistency of the relative position between the Hall sensor and the magnet on the handwheel, eliminating signal detection errors caused by installation tolerances or vibration, and improving the reliability, stability and control accuracy of the entire electronic handwheel system controlling the spindle motor.

[0010] Preferably, there are multiple support pillars, which are evenly spaced around the axis of the handwheel.

[0011] By adopting the above technical solution and setting multiple pillars evenly spaced around the handwheel axis, a uniform, symmetrical and highly rigid support is provided for the circuit board, which effectively suppresses the warping and vibration that may be caused by the circuit board due to stress or thermal deformation, and ensures the spatial position stability of the Hall sensor plane. This fundamentally guarantees the constant air gap and relative position between the magnet and the sensor, greatly improving the consistency of signal acquisition, anti-interference ability and the long-term reliability and accuracy of the entire control system.

[0012] Preferably, the support column is coaxially provided with a through-hole, the through-hole penetrates the support column, the positioning seat is provided with a first connection port, the circuit board is provided with a second connection port, and the mounting plate is provided with a fixing port. The fixing port, the first connection port, the through-hole, and the second connection port are coaxially arranged, and the screw passes through the second connection port, the through-hole, and the first connection port in sequence and is then threaded to the inner wall of the fixing port.

[0013] By adopting the above technical solution, rapid and accurate alignment and integrated rigid connection between the circuit board, support column, positioning seat and mounting plate are achieved, which greatly simplifies the assembly process, ensures the mechanical certainty of the relative positions between the components, effectively eliminates the assembly error accumulated in the multi-layer structure, and provides an extremely stable and interference-resistant mounting reference for the Hall sensor, thereby significantly improving the accuracy of signal detection and the overall reliability of the system.

[0014] Preferably, the positioning seat has a sleeve at one end away from the circuit board, the mounting plate has an installation port, the sleeve is connected to the inner wall of the installation port, and the handwheel is coaxially rotatably connected to the inner wall of the sleeve.

[0015] By adopting the above technical solution, the inner wall of the sleeve provides uniform radial support for the handwheel, which greatly reduces the wobble and vibration when the handwheel rotates, and ensures the stability of the handwheel rotation axis. This ensures that the relative motion trajectory between the magnet fixed to the handwheel and the Hall sensor on the circuit board remains highly consistent, significantly improving the accuracy and reliability of position signal acquisition and fundamentally guaranteeing the control precision of the electronic handwheel.

[0016] Preferably, the positioning seat has a through-hole, the through-hole is coaxially arranged with the sleeve, the through-hole passes through the positioning seat, the handwheel includes a wheel body and a wheel axle, one end of the wheel axle is coaxially fixedly connected to the wheel body, and the wheel axle is coaxially rotatably connected to the inner wall of the through-hole.

[0017] By adopting the above technical solution, the perforation constrains the positioning axis, thereby improving the rotational concentricity and motion stability.

[0018] Preferably, the handwheel further includes a limiting plate, which is located on the side of the positioning seat away from the mounting plate. The limiting plate is coaxially fixedly connected to the end of the wheel axle away from the wheel body. The diameter of the limiting plate is larger than the diameter of the through hole. The magnet is fixedly connected to the outer wall of the limiting plate.

[0019] By adopting the above technical solution, the limiting plate limits the axis, reducing the risk of axial movement and detachment of the handwheel, and ensuring that the wheel axle always rotates stably within the opening. This fundamentally guarantees the constant axial relative position between the magnet and the Hall sensor, greatly improving the long-term stability of signal detection and the reliability of system operation.

[0020] Preferably, the handwheel further includes a sealing ring, one side of the wheel body abuts against the end face of the sleeve, the outer wall of the wheel axle is coaxially provided with a sealing groove, the wheel body is coaxially provided with a locking port, the sealing ring is embedded in the sealing groove, and the outer wall of the sealing ring abuts against the inner wall of the locking port.

[0021] By adopting the above technical solution, a highly efficient axial and radial double sealing barrier is constructed by setting a sealing ring embedded in the sealing groove and interference fit with the inner wall of the locking port between the axle and the wheel body. This not only isolates external dust, oil and other contaminants from entering the sleeve and the rotating part of the axle, effectively preventing wear, jamming or signal abnormalities caused by contamination, but also further suppresses the minor vibrations and noise during handwheel operation through the elastic contact of the sealing ring. This significantly improves the smoothness of the rotation feel and the long-term durability and reliability of the system in harsh industrial environments, thereby improving the user's operating efficiency.

[0022] Preferably, there are multiple magnets, and the multiple magnets are evenly spaced around the axis of the limiting plate.

[0023] By adopting the above technical solution, multiple magnets are evenly spaced around the axis of the limiting plate, constructing a multi-pole pair magnetic encoding structure. This allows the handwheel to trigger multiple magnetic field changes with each minimum rotation angle, significantly improving the system's angular resolution and detection accuracy. At the same time, the strong composite magnetic field generated by the multiple magnets enhances the signal strength and anti-interference capability, ensuring that the Hall sensor can stably acquire clear position signals. Even in low-speed fine-tuning mode, it can achieve smooth and accurate spindle motor control, completely eliminating the signal dead zone and misjudgment risk that may exist in the traditional single-magnet solution.

[0024] Preferably, it also includes a positioning block, which is fixedly connected to the mounting plate. The positioning block has a positioning opening, and the fixing component and the circuit board are both located inside the positioning opening. The circuit board is connected to the inner wall of the positioning opening.

[0025] By adopting the above technical solution, the positioning port positions the circuit board installation, isolates the fixing parts and circuit board from other external components of the positioning block, eliminates the influence of vibration and thermal stress deformation under complex external working conditions on the circuit board and the position of the Hall sensor on it, thereby ensuring the absolute constancy of the air gap between the magnet and the sensor, greatly improving the consistency of the signal and the extreme reliability of the system in long-term harsh working environments.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The operation of the robotic handwheel is converted into electronic signals that can be recognized by the circuit board, thereby enabling convenient and precise start-up and control of the spindle motor through electronic control. This overcomes the problems of huge transmission resistance and laborious operation that traditional robotic handwheels have to overcome. At the same time, it realizes electronic decoupling between human-machine operation and motor drive, improving the user's operating efficiency. 2. By setting a sealing ring between the axle and the wheel body, which is embedded in the sealing groove and has an interference fit with the inner wall of the locking port, a highly efficient axial and radial double sealing barrier is constructed. This not only isolates external dust, oil and other contaminants from entering the sleeve and the rotating pair of the axle, effectively preventing wear, jamming or signal abnormalities caused by contamination, but also further suppresses the minor vibrations and noises during handwheel operation through the elastic contact of the sealing ring. This significantly improves the smoothness of the rotation feel and the long-term durability and reliability of the system in harsh industrial environments, thereby improving the user's operating efficiency. 3. Multiple magnets are evenly spaced around the axis of the limiting plate, constructing a multi-pole pair magnetic encoding structure. This allows the handwheel to trigger multiple magnetic field changes with each minimum rotation angle, significantly improving the system's angular resolution and detection accuracy. At the same time, the strong composite magnetic field generated by the multiple magnets enhances signal strength and anti-interference capabilities, ensuring that the Hall sensor can stably acquire clear position signals. Even in low-speed fine-tuning mode, it can achieve smooth and accurate spindle motor control, completely eliminating the signal dead zone and misjudgment risks that may exist in traditional single-magnet solutions. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an electronic handwheel for a sewing machine.

[0028] Figure 2 This is a cross-sectional view of an electronic handwheel on a sewing machine.

[0029] Figure 3This is a cross-sectional view of an electronic handwheel for a sewing machine, mainly showing the positioning block and fixing components.

[0030] Explanation of reference numerals in the attached drawings: 1. Mounting plate; 11. Fixing port; 12. Mounting port; 2. Positioning block; 21. Positioning port; 211. Heat dissipation groove; 3. Fixing component; 31. Positioning seat; 311. First connection port; 312. Sleeve; 313. Through hole; 32. Support column; 321. Through port; 4. Circuit board; 41. Second connection port; 5. Hall sensor; 6. Handwheel; 61. Wheel body; 611. Locking port; 62. Axle; 621. Sealing groove; 63. Limiting plate; 64. Sealing ring; 7. Magnet. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] This application discloses an electronic handwheel for a sewing machine. (Refer to...) Figure 1 and Figure 2 An electronic handwheel for a sewing machine includes a mounting plate 1, a positioning block 2, a fixing component 3, a circuit board 4, a Hall sensor 5, a handwheel 6, and a magnet 7.

[0033] Reference Figure 2 Mounting plate 1 is fixedly connected to the housing of the sewing machine. Positioning block 2 is fixedly connected to one side of mounting plate 1. Positioning block 2 has a positioning opening 21 coaxially, which penetrates the positioning block 2. Fixing component 3, circuit board 4, and Hall sensor 5 are all located inside positioning opening 21. Circuit board 4 is coaxially arranged with positioning opening 21 and connected to the inner wall of positioning opening 21. The inner wall of positioning opening 21 has three heat dissipation grooves 211, which are evenly spaced around the axis of positioning opening 21 and penetrate the positioning block 2 along the axis of positioning opening 21. Hall sensor 5 is fixedly connected to the side of circuit board 4 away from fixing component 3. Hall sensor 5 is located near the edge of circuit board 4 and is electrically connected to circuit board 4. Circuit board 4 is used for electrical connection to the spindle motor.

[0034] Reference Figure 3The fixing component 3 includes a positioning seat 31 and a support column 32. The positioning seat 31 is fixedly connected to the mounting plate 1 and is coaxially arranged with the positioning port 21. One end of the support column 32 is fixedly connected to the positioning seat 31, and the other end of the support column 32 is fixedly connected to the circuit board 4. The support column 32 is coaxially provided with a through port 321, which passes through the support column 32. The axis of the through port 321 is perpendicular to the mounting plate 1. The positioning seat 31 is provided with a first connection port 311, the circuit board 4 is provided with a second connection port 41, and the mounting plate 1 is provided with a fixing port 11. The fixing port 11, the first connection port 311, the through port 321, and the second connection port 41 are coaxially arranged. A screw passes through the second connection port 41, the through port 321, and the first connection port 311 in sequence and is then threaded into the inner wall of the fixing port 11. There are three support columns 32, which are evenly spaced around the axis of the positioning port 21.

[0035] The positioning seat 31 has a sleeve 312 coaxially provided at one end away from the circuit board 4. The mounting plate 1 has a mounting opening 12. The sleeve 312 is connected to the inner wall of the mounting opening 12. The positioning seat 31 has a through opening 313. The through opening 313 is coaxially provided with the sleeve 312. The through opening 313 passes through the positioning seat 31. The diameter of the through opening 313 is equal to the inner diameter of the sleeve 312.

[0036] Reference Figure 2 The handwheel 6 includes a wheel body 61, a wheel axle 62, a limiting plate 63, and a sealing ring 64. One end of the wheel axle 62 is coaxially fixedly connected to the wheel body 61, and the other end of the wheel axle 62 is coaxially fixedly connected to the limiting plate 63. The wheel axle 62 is coaxially rotatably connected to the inner wall of the through-hole 313. The limiting plate 63 is located on the side of the positioning seat 31 away from the mounting plate 1. The diameter of the limiting plate 63 and the diameter of the wheel body 61 are both larger than the diameter of the through-hole 313. One side of the limiting plate 63 abuts against the positioning seat 31, and one side of the wheel body 61 abuts against the end face of the sleeve 312. The outer wall of the wheel axle 62 is coaxially provided with a sealing groove 621, and the wheel body 61 is coaxially provided with a locking port 611. The sealing ring 64 is embedded in the sealing groove 621, and the outer wall of the sealing ring 64 abuts against the inner wall of the locking port 611.

[0037] Magnets 7 are fixedly connected to the outer wall of the limiting plate 63. Multiple magnets 7 are provided, and the multiple magnets 7 are evenly spaced around the axis of the limiting plate 63. In this embodiment, there are two magnets 7.

[0038] The implementation principle of the electronic handwheel of a sewing machine in this application embodiment is as follows: the operation of the mechanical handwheel 6 is converted into an electronic signal that can be recognized by the circuit board 4, so as to start and control the main shaft motor to run synchronously in a convenient and precise manner through electronic control, overcoming the problems of huge transmission resistance and laborious operation of the traditional mechanical handwheel 6.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electronic handwheel for a sewing machine, characterized in that: The device includes a mounting plate (1), a handwheel (6), a circuit board (4), a magnet (7), and a Hall sensor (5). The handwheel (6) and the circuit board (4) are respectively located on both sides of the mounting plate (1). The handwheel (6) is rotatably connected to the mounting plate (1) around its own axis. The circuit board (4) is fixedly connected to the mounting plate (1) by a fastener (3). The magnet (7) is fixedly connected to the handwheel (6). The Hall sensor (5) is fixedly connected to the circuit board (4). The circuit board (4) is used for electrical connection to the spindle motor.

2. The electronic handwheel of a sewing machine according to claim 1, characterized in that: The fastener (3) includes a positioning seat (31) and a support column (32). The positioning seat (31) is fixedly connected to the mounting plate (1). One end of the support column (32) is fixedly connected to the positioning seat (31), and the other end of the support column (32) is fixedly connected to the circuit board (4).

3. The electronic handwheel of a sewing machine according to claim 2, characterized in that: The support column (32) is provided in multiple ways, and the multiple support columns (32) are evenly spaced around the axis of the handwheel (6).

4. The electronic handwheel of a sewing machine according to claim 2, characterized in that: The support column (32) is coaxially provided with a through port (321), the through port (321) passes through the support column (32), the positioning seat (31) is provided with a first connection port (311), the circuit board (4) is provided with a second connection port (41), the mounting plate (1) is provided with a fixing port (11), the fixing port (11), the first connection port (311), the through port (321) and the second connection port (41) are coaxially provided, and the screw passes through the second connection port (41), the through port (321) and the first connection port (311) in sequence and is threaded to the inner wall of the fixing port (11).

5. The electronic handwheel of a sewing machine according to claim 2, characterized in that: The positioning seat (31) has a sleeve (312) at one end away from the circuit board (4), the mounting plate (1) has an installation port (12), the sleeve (312) is connected to the inner wall of the installation port (12), and the handwheel (6) is coaxially rotatably connected to the inner wall of the sleeve (312).

6. The electronic handwheel of a sewing machine according to claim 5, characterized in that: The positioning seat (31) is provided with a through hole (313), the through hole (313) is coaxially arranged with the sleeve (312), the through hole (313) passes through the positioning seat (31), the handwheel (6) includes a wheel body (61) and a wheel axle (62), one end of the wheel axle (62) is coaxially fixedly connected to the wheel body (61), and the wheel axle (62) is coaxially rotatably connected to the inner wall of the through hole (313).

7. The electronic handwheel of a sewing machine according to claim 6, characterized in that: The handwheel (6) also includes a limiting plate (63), which is located on the side of the positioning seat (31) away from the mounting plate (1). The limiting plate (63) is coaxially fixedly connected to the end of the wheel axle (62) away from the wheel body (61). The diameter of the limiting plate (63) is larger than the diameter of the through hole (313). The magnet (7) is fixedly connected to the outer wall of the limiting plate (63).

8. The electronic handwheel of a sewing machine according to claim 7, characterized in that: The handwheel (6) also includes a sealing ring (64). One side of the wheel body (61) abuts against the end face of the sleeve (312). The outer wall of the wheel axle (62) is coaxially provided with a sealing groove (621). The wheel body (61) is coaxially provided with a locking port (611). The sealing ring (64) is embedded in the sealing groove (621). The outer wall of the sealing ring (64) abuts against the inner wall of the locking port (611).

9. The electronic handwheel of a sewing machine according to claim 7, characterized in that: The magnet (7) is provided in multiples, and the multiple magnets (7) are evenly spaced around the axis of the limiting plate (63).

10. The electronic handwheel of a sewing machine according to claim 1, characterized in that: It also includes a positioning block (2), which is fixedly connected to the mounting plate (1). The positioning block (2) has a positioning port (21). The fixing component (3) and the circuit board (4) are both located inside the positioning port (21). The circuit board (4) is connected to the inner wall of the positioning port (21).

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