Mechanical space angle measuring structure for lens edging

Abstract

The utility model provides a kind of mechanical space angle measurement structure for lens edging, including tool rest, fixed base and potentiometer;The connecting shaft is provided on the tool rest;The connecting shaft is rotatably connected in the socket joint hole of fixed base, the potentiometer is installed in socket joint hole, and potentiometer includes fixed part and rotating part;The fixed part is connected with fixed base, the rotating part is coaxially connected with connecting shaft, and rotating part is rotated by the connecting shaft on tool rest, so that potentiometer real-time feedback rotation angle of tool rest.The utility model's advantage this structure can synchronous, accurate capture the rotation angle of tool rest by potentiometer, avoid the angle measurement deviation caused by axis offset, solve the practical assembly error problem that exists in traditional angle calculation depending on theory formula, provide basic angle data support for subsequent accurate processing lens.

Description

Technical Field

[0001] This utility model relates to the field of lens polishing technology, and more specifically, to a mechanical spatial angle measuring structure for lens edge polishing. Background Technology

[0002] In the field of high-end optical lens processing, especially in the production of eyeglass lenses, camera lenses, and optical components for precision instruments, the front and back surfaces of lenses are typically spherical or aspherical curved sections. To meet optical performance requirements, the processing involves multiple steps such as edge grinding, grooving, and drilling on the lens edges. The cutting tools used in different steps (such as drilling tools, grooving tools, and grinding wheels) need to maintain specific spatial angles with the lens surface during processing. For example, drilling tools are usually perpendicular to the front surface of the lens, while grooving tools require calculation and adjustment of their tilt angle based on the lens's radius of curvature to ensure processing accuracy and surface quality.

[0003] Existing edge grinding machines mostly use rotating mechanisms to adjust the tool angle, and their angle control usually relies on preset theoretical formulas for angle calculation and position control. However, during actual assembly and operation, due to unavoidable installation gaps, fit errors, and component deformation between mechanical parts, deviations will occur between the angle value calculated by the formula and the actual spatial position of the tool. This prevents real-time precision calibration and positioning of the spatial angle, resulting in insufficient measurement accuracy of the tool rotation angle, which in turn affects the dimensional accuracy and surface quality of the processed parts. In the production of high-precision optical lenses, such minute angular errors are sufficient to cause a decrease in the optical performance of the lens, edge stress concentration, or even product scrap, thereby reducing production yield and increasing costs. Utility Model Content

[0004] This invention addresses the technical problem of low accuracy in measuring rotation angles in existing mechanical rotating structures due to errors between theoretical formulas and actual assembly. To overcome these shortcomings, this invention provides a method that embeds a precision potentiometer into a compact mechanical structure and outputs an analog signal through the potentiometer. This allows for convenient real-time reading and precise measurement of the tool holder's rotation angle, thereby significantly improving the machine's accuracy requirements.

[0005] To achieve the purpose of this utility model, the following technical solution is adopted: A mechanical spatial angle measuring structure for lens edging includes a tool holder, a fixed base, and a potentiometer. A connecting shaft is mounted on the tool holder. The connecting shaft is rotatably connected to a socket in the fixed base. The potentiometer is installed in the socket and includes a fixed part and a rotating part. The fixed part is connected to the fixed base, and the rotating part is coaxially connected to the connecting shaft. The rotating part is driven to rotate via the connecting shaft on the tool holder, allowing the potentiometer to provide real-time feedback of the tool holder's rotation angle. This structure achieves real-time electrical signal feedback of the tool holder's rotation angle through direct linkage between the potentiometer and the tool holder's connecting shaft. This ensures that the potentiometer can synchronously and accurately capture the tool holder's rotation angle during rotation, avoiding angle measurement deviations caused by axial offset. It solves the problem of actual assembly errors inherent in traditional angle calculations relying on theoretical formulas, providing fundamental angle data support for subsequent precise lens processing. Furthermore, this structure only embeds the potentiometer into the existing compact mechanical structure of the lens edging machine, eliminating the need for large-scale modifications to the overall equipment. This balances structural innovation and equipment compatibility, reducing technology upgrade costs.

[0006] Preferably, the top surface of the connecting shaft is provided with a limiting groove along the axial direction, and the rotating part of the potentiometer is connected to the limiting groove along the axial direction, with the limiting groove and the rotating part being coaxially arranged. The transmission connection between the limiting groove and the rotating part ensures the accuracy of angle transmission, has a simple structure, is easy to assemble, and facilitates a reliable connection between the potentiometer and the tool holder shaft in a confined space.

[0007] Preferably, a rubber sleeve is interference-fitted between the inner peripheral wall of the limiting groove and the outer peripheral wall of the rotating part, and the connecting shaft drives the rotating part to rotate synchronously through the friction of the rubber sleeve. The rubber sleeve not only provides transmission friction but also has a buffering and vibration-damping function, effectively absorbing the vibration and impact generated by the tool during high-speed rotation or reversal, protecting the potentiometer from damage. This extends the service life of the potentiometer and improves the stability of the measurement system in high-speed, high-frequency motion environments.

[0008] Preferably, the outer wall of the tool holder is provided with a mounting groove; the bottom of the mounting groove is provided with a blind mounting hole along the axial direction of the connecting shaft; the connecting shaft is stepped, with a stepped surface formed between its large diameter section and small diameter section; the connecting shaft is fixedly installed axially on the blind mounting hole, and the stepped surface on the connecting shaft is in contact with the bottom of the mounting groove. This structure provides dual axial and radial positioning of the connecting shaft, preventing it from loosening or shifting during equipment operation, providing reliable support for the stable rotation of the fixed seat, and indirectly ensuring the accuracy of angle measurement. Furthermore, the mounting groove and blind mounting hole provide a clear installation position for the connecting shaft, making the assembly process more standardized and operable, reducing assembly difficulty, minimizing errors caused by improper assembly operations, and facilitating the disassembly and replacement of components during later maintenance, thus improving equipment operation and maintenance efficiency.

[0009] Preferably, the bottom of the mounting groove is provided with a positioning boss protruding axially; the mounting blind hole is provided on the top surface of the positioning boss, the stepped surface on the connecting shaft fits against the top surface of the positioning boss, the fixing seat is sleeved on the connecting shaft and the positioning boss, and a first sealing ring is provided between the lower inner wall of the fixing seat and the outer wall of the positioning boss. Through the combined design of the positioning boss and the first sealing ring, precise positioning between the fixing seat and the tool holder is achieved, and external coolant, grinding debris, and other impurities are effectively prevented from entering the fixing seat, protecting the internal bearings and potentiometers. This improves the environmental adaptability of the structure and makes it suitable for harsh working conditions with high water and dust levels commonly encountered in lens edging processes.

[0010] Preferably, an upper bearing and a lower bearing are provided between the inner wall of the fixed seat and the outer wall of the connecting shaft; a limiting boss protrudes radially from the inner wall of the fixed seat; the lower bearing is axially limited between the top surface of the positioning boss and the bottom surface of the limiting boss, and the upper bearing is axially limited between the top surface of the limiting boss and the bottom surface of the potentiometer. The dual bearings effectively reduce the frictional resistance between the fixed seat, the connecting shaft, and the positioning boss, making the tool holder rotation smoother and more stable, avoiding tool holder jamming due to excessive friction, ensuring a smooth angle adjustment process, reducing angle adjustment errors, and improving angle positioning efficiency. Furthermore, the limiting boss provides precise axial positioning of the upper and lower bearings, preventing axial movement of the bearings during operation, ensuring stable bearing operation, and maintaining the relative positional accuracy of the fixed seat and other components, indirectly improving angle measurement and positioning accuracy.

[0011] Preferably, a positioning assembly is further provided between the upper bearing and the bottom surface of the potentiometer. The positioning assembly includes a bearing retaining sleeve and a spacer positioning sleeve. The bearing retaining sleeve is fitted onto the connecting shaft, and the spacer positioning sleeve is fitted outside the bearing retaining sleeve, with the top surface of the spacer positioning sleeve abutting against the bottom surface of the fixing part, and the bottom surface of the spacer positioning sleeve abutting against the top surface of the upper bearing. Through the cooperation of the bearing retaining sleeve and the spacer positioning sleeve, the distance between the upper bearing and the potentiometer assembly can be precisely controlled, ensuring that the upper bearing and the potentiometer assembly maintain a stable relative position. This avoids uneven force or axial displacement of the potentiometer shaft due to distance deviation between components, ensuring that the potentiometer can accurately capture the angle of the fixing seat, further improving angle measurement accuracy. Furthermore, the spacer positioning sleeve can evenly transmit the pressure of the potentiometer assembly to the upper bearing, preventing excessive localized force that could damage the bearing or potentiometer assembly, extending the service life of the components, ensuring the stability of the overall structure, reducing equipment failures caused by component damage, and improving equipment operational reliability.

[0012] Preferably, the potentiometer's fixing part is fixedly mounted inside the socket hole by a potentiometer fixing sleeve, and the potentiometer fixing sleeve and the fixing base are fixedly connected by screws. The potentiometer fixing sleeve has a potentiometer slot that matches the shape of the fixing part and faces downwards; the fixing part is fixedly installed in the potentiometer slot. The detachable connection between the potentiometer fixing sleeve and the screw facilitates quick installation, replacement, or repair of the potentiometer, reducing maintenance costs. The potentiometer slot structure ensures that the potentiometer is firmly fixed and accurately aligned, preventing displacement due to vibration or impact from affecting signal output.

[0013] Preferably, the outer wall of the potentiometer mounting sleeve is provided with at least one sealing ring groove along the circumferential direction; a second sealing ring is disposed within the sealing ring groove; the second sealing ring abuts against the outer wall of the potentiometer mounting sleeve and the inner wall of the mounting base. The second sealing ring effectively isolates external liquids and dust from entering the potentiometer mounting area, preventing signal distortion or short-circuit failure due to contamination. This further improves the reliability and durability of the measurement system in harsh industrial environments.

[0014] Preferably, the potentiometer is a rotary potentiometer, whose output signal is linearly related to the rotation angle of the tool holder. By using a rotary potentiometer with linear output, a good linear relationship between the angle signal and the voltage signal is ensured, facilitating high-precision analysis and closed-loop control of the control system. This simplifies the signal processing flow and improves the system response speed and control accuracy.

[0015] The advantages of this utility model are: By coaxially integrating a precision potentiometer with the mechanical rotating structure, the real-time rotation angle of the tool holder can be directly detected, avoiding the calculation errors caused by mechanical backlash and deformation in traditional methods. Actual measurements show that the angle measurement accuracy can be improved by approximately 0.5 degrees, greatly ensuring the accuracy of the tool's spatial angle.

[0016] The analog signal output by the potentiometer can be easily read by the control system, realizing real-time monitoring and closed-loop control of the tool holder angle, facilitating online calibration in production, and improving processing consistency and yield.

[0017] The entire measuring structure is cleverly embedded in the existing compact mechanical space without taking up too much extra space. Through bearing support, stepped positioning, and sealing design, the rigidity, stability, and long service life of the structure are ensured under high-speed rotation and harsh processing environments.

[0018] The multi-layered sealing ring (first and second sealing rings) design effectively prevents foreign objects such as dust and coolant generated during the edge grinding process from entering the precision transmission and measurement components, thereby improving the reliability and durability of the system. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the mechanical spatial angle measuring structure for lens edging according to this invention. Figure 2 is a schematic diagram of the mechanical spatial angle measuring structure for lens edging according to this invention (without a fixed base). Figure 3 is a cross-sectional view of the mechanical spatial angle measuring structure for lens edging according to this invention.

[0020] Explanation of reference numerals in the attached figures: 1. Tool holder; 11. Mounting slot; 12. Mounting blind hole; 13. Positioning boss; 2. Connecting shaft; 20. Limiting groove; 21. Stepped surface; 3. Fixing seat; 30. Sleeve hole; 31. Upper bearing; 32. Lower bearing; 33. Limiting boss; 4. Potentiometer; 401. Fixing part; 402. Rotating part; 41. Potentiometer fixing sleeve; 411. Sealing ring groove; 43. Screw; 6. Rubber sleeve; 7. First sealing ring; 8. Bearing fixing sleeve; 9. Spacer positioning sleeve; 10. Second sealing ring. Detailed Implementation

[0021] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0022] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0023] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 3As shown, a mechanical spatial angle measuring structure for lens edging includes a tool holder 1, a fixed base 3, and a potentiometer 4 arranged coaxially. A connecting shaft 2 is provided on the tool holder 1. The connecting shaft 2 is rotatably connected to the socket 30 of the fixed base 3. The potentiometer 4 is installed in the socket 30, and the potentiometer 4 includes a fixed part 401 and a rotating part 402. The fixed part 401 is the potentiometer body, and the rotating part 402 is the potentiometer shaft. The fixed part 401 is fixedly connected to the fixed base 3, and the rotating part 402 is coaxially connected to the connecting shaft 2 (the central axis of the potentiometer 4, the rotation axis of the tool holder 1, and the central axis of the socket 30 are collinear). The rotating part 402 is driven to rotate through the connecting shaft 2 on the tool holder 1, so that the potentiometer 4 can provide real-time feedback on the rotation angle of the tool holder 1. This structure clarifies the assembly relationship between the tool holder 1, connecting shaft 2, fixed base 3, and potentiometer 4, enabling direct linkage between potentiometer 4 and connecting shaft 2 of tool holder 1. This allows for real-time electrical signal feedback of the rotation angle of tool holder 1, ensuring that potentiometer 4 can synchronously and accurately capture the rotation angle of tool holder 1 during rotation. This avoids angle measurement deviations caused by axis offset, solving the problem of actual assembly errors that exist in traditional angle calculations based on theoretical formulas. It provides basic angle data support for subsequent precise lens processing. Furthermore, this structure only embeds potentiometer 4 into the existing compact mechanical structure of the lens edging machine, eliminating the need for large-scale modifications to the overall equipment. This balances structural innovation with equipment compatibility, reducing technology upgrade costs.

[0026] like Figure 2 and Figure 3 As shown, a limiting groove 20 is provided axially on the top surface of the connecting shaft 2. The rotating part 402 on the potentiometer 4 is axially connected within the limiting groove 20, and the limiting groove 20 and the rotating part 402 are coaxially arranged. The transmission connection between the limiting groove 20 and the rotating part 402 ensures the accuracy of angle transmission. The structure is simple and easy to assemble, facilitating a reliable connection between the potentiometer 4 and the connecting shaft 2 of the tool holder 1 in a confined space. This allows the rotation angle of the tool holder 1 in space to be precisely fed back through the potentiometer 4, ensuring that the tool holder 1 is positioned strictly according to the specific spatial angle required for lens processing, meeting the stringent requirements of high-end optical lenses for processing angles, and guaranteeing the optical performance of the lenses.

[0027] like Figure 3 As shown, in this embodiment, a rubber sleeve 6 is interference-fitted between the inner peripheral wall of the limiting groove 20 and the outer peripheral wall of the rotating part 402. The inner peripheral wall of the rubber sleeve 6 is in close contact with the outer peripheral wall of the rotating part 402, and the outer peripheral wall is in close contact with the inner peripheral wall of the limiting groove 20. The connecting shaft 2 drives the rotating part 402 to rotate synchronously through the friction of the rubber sleeve 6. The rubber sleeve 6 not only provides transmission friction but also has a buffering and vibration reduction function, effectively absorbing the vibration and impact generated by the tool during high-speed rotation or reversal, protecting the potentiometer 4 from damage. This extends the service life of the potentiometer 4 and improves the stability of the measurement system in high-speed, high-frequency motion environments.

[0028] like Figure 2 and Figure 3 As shown, the outer wall of the tool holder 1 is provided with a mounting groove 11, the bottom of which is horizontal. A positioning boss 13 protrudes axially from the bottom of the mounting groove 11. The positioning boss 13 is cylindrical, and a blind mounting hole 12 is provided axially at the center of its top surface. The blind mounting hole 12 is stepped and consists of two sections with a decreasing diameter from top to bottom. The connecting shaft 2 is a stepped cylinder and consists of three sections with a decreasing diameter from top to bottom, with a stepped surface 21 formed between the large and small diameter sections. The connecting shaft 2 is axially fixedly press-fitted onto the blind mounting hole 12, and the uppermost stepped surface 21 of the connecting shaft 2 is in contact with the top surface of the positioning boss 13. This structure provides dual axial and radial positioning for the connecting shaft 2, preventing it from loosening or shifting during equipment operation, providing reliable support for the stable rotation of the fixed seat 3, and indirectly ensuring the accuracy of angle measurement. Furthermore, the mounting groove 11 and the mounting blind hole 12 provide a clear installation position for the connecting shaft 2, making the assembly process more standardized and operable, reducing assembly difficulty, minimizing errors caused by improper assembly operations, and facilitating the disassembly and replacement of components during later maintenance, thereby improving equipment operation and maintenance efficiency. The fixing seat 3 is sleeved on the connecting shaft 2 and the positioning boss 13, and a first sealing ring 7 is provided between the lower inner wall of the fixing seat 3 and the outer wall of the positioning boss 13. By setting the first sealing ring 7, combined with the seal between the limiting groove 20 and the rotating part 402, a double sealing structure is formed, further enhancing the protection effect on the internal components of the equipment, effectively blocking the intrusion of external impurities, and preventing internal lubricating grease leakage, ensuring the normal operation of moving parts such as bearings, and improving equipment reliability.

[0029] like Figure 2 and Figure 3As shown, an upper bearing 31 and a lower bearing 32 are provided between the inner wall of the fixed base 3 and the outer wall of the connecting shaft 2. A limiting boss 33 protrudes radially from the inner wall of the fixed base 3. The lower bearing 32 is axially limited between the top surface of the positioning boss 13 and the bottom surface of the limiting boss 33, and the upper bearing 31 is axially limited between the top surface of the limiting boss 33 and the bottom surface of the potentiometer 4. The double bearings effectively reduce the frictional resistance between the fixed base 3 and the connecting shaft 2 and the positioning boss 13, making the rotation of the tool holder 1 smoother and more stable, avoiding jamming of the tool holder 1 due to excessive friction, ensuring a smooth angle adjustment process, reducing angle adjustment errors, and improving angle positioning efficiency. Furthermore, the setting of the limiting boss 33 provides precise axial positioning for the upper bearing 31 and the lower bearing 32, preventing axial movement of the bearings during operation, ensuring stable bearing operation, and maintaining the relative positional accuracy of the fixed base 3 and other components, indirectly improving the angle measurement and positioning accuracy. A positioning assembly is also provided between the upper bearing 31 and the bottom surface of the potentiometer 4. The positioning assembly includes a bearing retaining sleeve 8 and a spacer positioning sleeve 9. The bearing retaining sleeve 8 is fitted onto the upper end of the connecting shaft 2, and the bottom surface of the bearing retaining sleeve 8 abuts against the top surface of the upper bearing 31. The spacer positioning sleeve 9 is fitted onto the bearing retaining sleeve 8, and the top surface of the spacer positioning sleeve 9 abuts against the bottom surface of the potentiometer 4, while the bottom surface of the spacer positioning sleeve 9 abuts against the top surface of the upper bearing 31. Through the cooperation of the bearing retaining sleeve 8 and the spacer positioning sleeve 9, the distance between the upper bearing 31 and the potentiometer 4 can be precisely controlled, ensuring that the upper bearing 31 and the potentiometer 4 maintain a stable relative position. This avoids uneven force or axial displacement of the rotating part 402 of the potentiometer 4 due to the distance deviation between the components, ensuring that the potentiometer 4 can accurately capture the angle of the tool holder 1, and further improving the angle measurement accuracy. Furthermore, the pressure of the potentiometer 4 can be evenly transmitted to the upper bearing 31 through the spacer positioning sleeve 9, avoiding excessive local stress that could damage the bearing or potentiometer 4, extending the service life of the components, ensuring the stability of the overall structure, reducing equipment failures caused by component damage, and improving the reliability of equipment operation.

[0030] like Figure 3 As shown, the fixing part 401 of potentiometer 4 is fixedly installed in the socket 30 by potentiometer fixing sleeve 41, and the potentiometer fixing sleeve 41 and the fixing base 3 are fixedly connected by screws 43. In this embodiment, the screws 43 are set screws. The connection strength and stability are good, which can effectively prevent the potentiometer fixing sleeve 41 from loosening during equipment vibration or rotation, ensuring the stability of the potentiometer 4 and avoiding measurement errors caused by loose fixing. The potentiometer fixing sleeve 41 is provided with a potentiometer slot that matches the shape of the fixing part 401 and faces downward; the fixing part 401 is fixedly installed in the potentiometer slot. The detachable connection between the potentiometer fixing sleeve 41 and the screws 43 facilitates the quick installation, replacement or maintenance of the potentiometer 4, reducing maintenance costs. The potentiometer slot structure ensures that the potentiometer 4 is firmly fixed and accurately aligned, avoiding displacement of the potentiometer 4 due to vibration or impact, which would affect the signal output.

[0031] like Figure 2 and Figure 3 As shown, the outer wall of the potentiometer mounting sleeve 41 has two axially spaced sealing ring grooves 411 arranged circumferentially; a second sealing ring 10 is disposed within the sealing ring groove 411; the second sealing ring 10 abuts against the outer wall of the potentiometer mounting sleeve 41 and the inner wall of the mounting base 3. The second sealing ring 10 effectively seals the gap between the potentiometer mounting sleeve 41 and the mounting base 3, preventing external dust, coolant, and other impurities from entering the potentiometer mounting area, protecting the potentiometer 4 from contamination and damage; it also prevents leakage of lubricating grease within the potentiometer mounting area, ensuring smooth operation of the potentiometer 4 and improving equipment reliability and service life. Furthermore, the good sealing effect maintains a clean and dry working environment for the potentiometer 4, preventing damage or performance degradation of internal components due to environmental factors such as impurities and moisture, ensuring the potentiometer 4 maintains accurate analog signal output over a long period, and guaranteeing the stability and accuracy of angle measurement.

[0032] Potentiometer 4 is a rotary potentiometer, and its output signal has a linear relationship with the rotation angle of the tool holder 1. By using a rotary potentiometer with linear output, a good linear relationship between the angle signal and the voltage signal is ensured, which facilitates high-precision analysis and closed-loop control of the control system. This simplifies the signal processing flow and improves the system response speed and control accuracy. In this embodiment, potentiometer 4 introduces a 360-degree linear angle in space. Potentiometer 4 is powered by 5V, so it outputs 0-5V from 0 to 360 degrees. Based on this linear relationship, the spatial angle of the mechanical tool rotation can be measured by measuring the output voltage of potentiometer 4. By combining it with mathematical model algorithms, the defects of rotary mechanical structures in terms of precision calibration and spatial angle positioning are solved. This method has a clever mechanical installation, and the analog output signal of potentiometer 4 is easy and accurate to read, thus greatly improving the accuracy requirements of the machine. Compared with the previous generation without potentiometer 4, the accuracy is improved by 0.5 degrees because this device is directly mounted on the axis after being integrated with the original compact mechanical structure, which avoids the errors of spatial gaps and installation gaps introduced by the previous method of calculating only formulas.

[0033] During the lens edging process, when the tool angle needs to be adjusted, the tool holder 1 and its connecting shaft 2 are rotated together. The rotation of the connecting shaft 2 is transmitted to the rotating part 402 (potentiometer shaft) of the potentiometer 4 without slippage through the rubber sleeve 6. The potentiometer 4 converts the angular displacement of the rotating part 402 into a proportional electrical signal (such as a voltage signal) in real time and outputs it to the control system of the edging machine. By reading this electrical signal, the control system can accurately determine the actual angular position of the tool holder 1 and the tool in space, and compare it with the target angle to achieve closed-loop control, thereby ensuring processing accuracy.

[0034] In summary, the advantages of this utility model are: Real-time accurate measurement: Through the direct coaxial linkage between potentiometer 4 and the connecting shaft 2 of tool holder 1, the mechanical rotation angle is converted into an electrical signal in real time, realizing direct and high-precision feedback of the actual spatial angle of tool holder 1, fundamentally eliminating the systematic errors caused by theoretical calculation, assembly gaps and component deformation.

[0035] High rigidity and stability: The structure employs multiple positioning and support features, including a stepped shaft, positioning boss 13, upper and lower bearings, and limiting boss 33. This ensures the axial and radial rigidity of the connecting shaft 2 under high-speed rotation, minimizes the deformation and sway of the measuring structure, and guarantees the repeatability and long-term stability of angle measurements.

[0036] Vibration resistance and long service life: The non-rigid transmission achieved by the rubber sleeve 6 effectively buffers the vibration and impact during the operation of the tool, protects the precision potentiometer 4 from damage, and extends the service life of the entire measuring structure.

[0037] Excellent environmental adaptability: By setting the first sealing ring 7 and the second sealing ring 10, multiple sealing protections are formed, which effectively prevents coolant, metal chips and dust in the edge grinding environment from entering the bearing and potentiometer 4 area, ensuring the reliable operation of the measurement system under harsh working conditions.

[0038] Easy to assemble and maintain: Potentiometer 4 is installed in a detachable manner using potentiometer fixing sleeve 41 and screw 43. The bearing is pre-positioned by positioning components, which makes the assembly, debugging and subsequent maintenance and replacement of the entire structure very convenient and reduces maintenance costs.

[0039] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0040] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mechanical spatial angle measuring structure for lens edging, characterized in that, The device includes a tool holder (1), a fixed base (3), and a potentiometer (4). A connecting shaft (2) is provided on the tool holder (1). The connecting shaft (2) is rotatably connected to the socket (30) of the fixed base (3). The potentiometer (4) is installed in the socket (30), and the potentiometer (4) includes a fixed part (401) and a rotating part (402). The fixed part (401) is connected to the fixed base (3), and the rotating part (402) is coaxially connected to the connecting shaft (2). The rotating part (402) is driven to rotate by the connecting shaft (2) on the tool holder (1), so that the potentiometer (4) can provide real-time feedback on the rotation angle of the tool holder (1).

2. The mechanical spatial angle measuring structure for lens edging according to claim 1, characterized in that, The top surface of the connecting shaft (2) is provided with a limiting groove (20) along the axial direction. The rotating part (402) on the potentiometer (4) is connected to the limiting groove (20) along the axial direction, and the limiting groove (20) and the rotating part (402) are coaxially arranged.

3. The mechanical spatial angle measuring structure for lens edging according to claim 2, characterized in that, A rubber sleeve (6) is provided between the inner peripheral wall of the limiting groove (20) and the outer peripheral wall of the rotating part (402) with an interference fit, and the connecting shaft (2) drives the rotating part (402) to rotate synchronously through the friction of the rubber sleeve (6).

4. The mechanical spatial angle measuring structure for lens edging according to claim 1, characterized in that, The tool holder (1) has an installation groove (11) on its outer wall; the bottom of the installation groove (11) has an installation blind hole (12) along the axial direction of the connecting shaft (2); the connecting shaft (2) is stepped, and a step surface (21) is formed between its large diameter section and small diameter section; the connecting shaft (2) is fixedly installed on the installation blind hole (12) along the axial direction, and the step surface (21) on the connecting shaft (2) is in contact with the bottom of the installation groove (11).

5. The mechanical spatial angle measuring structure for lens edging according to claim 4, characterized in that, The bottom of the mounting groove (11) is provided with a positioning boss (13) protruding along the axial direction; the mounting blind hole (12) is provided on the top surface of the positioning boss (13); the stepped surface (21) on the connecting shaft (2) is in contact with the top surface of the positioning boss (13); the fixing seat (3) is sleeved on the connecting shaft (2) and the positioning boss (13); and a first sealing ring (7) is provided between the lower inner wall of the fixing seat (3) and the outer wall of the positioning boss (13).

6. The mechanical spatial angle measuring structure for lens edging according to claim 5, characterized in that, An upper bearing (31) and a lower bearing (32) are provided between the inner wall of the fixed seat (3) and the outer wall of the connecting shaft (2); a limiting boss (33) is provided radially protruding from the inner wall of the fixed seat (3); the lower bearing (32) is axially limited between the top surface of the positioning boss (13) and the bottom surface of the limiting boss (33), and the upper bearing (31) is axially limited between the top surface of the limiting boss (33) and the bottom surface of the potentiometer (4).

7. The mechanical spatial angle measuring structure for lens edging according to claim 6, characterized in that, A positioning component is also provided between the upper bearing (31) and the bottom surface of the potentiometer (4); the positioning component includes a bearing fixing sleeve (8) and a spacer positioning sleeve (9); the bearing fixing sleeve (8) is sleeved on the connecting shaft (2), the spacer positioning sleeve (9) is sleeved outside the bearing fixing sleeve (8), and the top surface of the spacer positioning sleeve (9) abuts against the bottom surface of the fixing part (401), and the bottom surface of the spacer positioning sleeve (9) abuts against the top surface of the upper bearing (31).

8. The mechanical spatial angle measuring structure for lens edging according to claim 1, characterized in that, The fixing part (401) of the potentiometer (4) is fixedly installed in the socket (30) by the potentiometer fixing sleeve (41), and the potentiometer fixing sleeve (41) and the fixing base (3) are fixedly connected by screws (43). The potentiometer fixing sleeve (41) is provided with a potentiometer groove that matches the shape of the fixing part (401) and has an opening facing downward; the fixing part (401) is fixedly installed in the potentiometer groove.

9. The mechanical spatial angle measuring structure for lens edging according to claim 8, characterized in that, The outer wall of the potentiometer fixing sleeve (41) is provided with at least one sealing ring groove (411) along the circumferential direction; a second sealing ring (10) is provided in the sealing ring groove (411); the second sealing ring (10) abuts between the outer wall of the potentiometer fixing sleeve (41) and the inner wall of the fixing seat (3).

10. The mechanical spatial angle measuring structure for lens edging according to claim 1, characterized in that, The potentiometer (4) is a rotary potentiometer, and its output signal is linearly related to the rotation angle of the tool holder (1).

Images