Encoder flange mounting structure and method of mounting the same

Abstract

The application relates to an encoder gear disc mounting structure and a deviation rectifying mounting method thereof, which comprises a clamping piece, a plurality of inclined threaded holes are arranged on the end surface of the gear disc in an inclined manner, the plurality of inclined threaded holes are arranged at intervals around the axis of the gear disc, and the axis of each inclined threaded hole is arranged at an angle of 40-50 degrees with the axis of the gear disc, the clamping piece is used for penetrating the inclined threaded hole from outside to inside, and the head of the clamping piece is used for clamping the outer edge of the main shaft under the action of a set torsion. The application has the effects of adapting to the installation of a small space on the main shaft, facilitating the detection and adjustment of the installation precision of the gear disc, and improving the detection precision of the encoder.

Description

Technical Field

[0001] This application relates to the field of encoder tooth disks, and in particular to an encoder tooth disk mounting structure and its correction mounting method. Background Technology

[0002] The encoder gear is a key component in a magnetic encoder used to detect the spindle speed and angular position; the installation accuracy of the gear affects the detected values. (Refer to...) Figure 1 and Figure 2 The gear disc 1 is usually installed in conjunction with the gear disc holder 01. Both the gear disc 1 and the gear disc holder 01 have fixed threaded holes 03 parallel to the axis. During installation, the gear disc 1 is fitted onto the gear disc holder 01 and fixed together with bolts 04. The outer circle of the gear disc holder 01 and the inner hole of the gear disc 1 are usually designed to have an overfit. Then, the inner circle of the gear disc holder 01 is fitted onto the spindle 02, and the locking nut 4 is screwed on from the outside to fix the gear disc holder and restrict the axial movement of the gear disc 1 and the gear disc holder 01.

[0003] This installation method not only occupies the already limited internal space on the spindle, making installation inconvenient when the spindle space is small, but also indirectly affects the installation accuracy of the gear sprocket due to the machining accuracy of the gear sprocket holder. When there are problems with the machining or installation accuracy of the gear sprocket holder, it will directly affect the installation and usage accuracy of the gear sprocket. Summary of the Invention

[0004] To accommodate installation in limited space on the spindle and to facilitate the detection and adjustment of the gear plate installation accuracy, thereby improving the encoder's detection accuracy, this application provides an encoder gear plate installation structure and its correction installation method.

[0005] Firstly, the encoder gear plate mounting structure provided in this application adopts the following technical solution:

[0006] An encoder gear plate mounting structure includes a clamping member. The gear plate has a plurality of oblique threaded holes on its end face. The plurality of oblique threaded holes are spaced apart around the axis of the gear plate, and the axis of each oblique threaded hole is set at an angle of 40° to 50° with the axis of the gear plate. The clamping member is used to pass through the oblique threaded holes from the outside to the inside, and the head of the clamping member is used to clamp against the outer edge of the main shaft under a set torque.

[0007] By adopting the above technical solution, multiple oblique threaded holes are directly opened along the circumference of the gear disk. Then, a clamping member is used to pass through the oblique threaded holes and clamp the gear disk to the outer edge of the spindle with a set torque. The oblique threaded holes will not damage the teeth of the gear disk. The clamping member is installed with a set torque to ensure that the outer edge of the spindle will not be worn, thus fixing the gear disk on the spindle. This allows the gear disk to be subjected to both axial and radial forces, which can limit the axial movement of the gear disk on the spindle. Therefore, the locking nut can be eliminated by eliminating the gear disk seat, further reducing the space occupied on the spindle. This is suitable for installation on spindles with small spaces. By directly installing the gear disk on the spindle, the mechanical accuracy of the gear disk can be directly detected by measuring the outer diameter runout of the gear disk with a dial indicator, which helps to improve the detection accuracy of the gear disk.

[0008] Preferably, there is a diameter gap of 0.01-0.02 mm between the gear plate and the main shaft, and the circumferential diameter gap is eliminated after each of the clamping components is installed.

[0009] By adopting the above technical solution, the gear plate and the spindle are fitted with a small clearance, which makes it easier to install the gear plate. Furthermore, the clamping parts are tightened by the detection and adjustment process of the outer circle runout of the gear plate, so as to ensure that the installation accuracy of the gear plate is within the allowable error range.

[0010] Preferably, the clamping member uses a copper internal hexagonal set screw.

[0011] By adopting the above technical solution, the copper set screw has a certain ductility. During the rotation of the spindle, a certain vibration will be generated. Utilizing the ductility of the copper set screw itself, it can stretch or contract with the vibration of the spindle, ensuring that the gear plate and the spindle fit tightly together and achieve a firm fixation of the gear plate. This is beneficial to improving the installation accuracy of the gear plate. At the same time, it can also effectively reduce the probability of the set screw making hard contact with the spindle when it vibrates with the spindle, thus causing wear on the outer edge of the spindle.

[0012] Preferably, the angle between the axis of the oblique threaded hole and the axis of the gear disc is set to 45°.

[0013] By adopting the above technical solution, the angle between the axis of the oblique threaded hole and the axis of the gear plate is set to 45°, which not only facilitates the processing of the oblique threaded hole, but also helps to balance the force between the set screw and the outer edge of the spindle. Under the premise of avoiding wear on the spindle, the diameter gap between the inner circle of the gear plate and the spindle is eliminated, ensuring the firm fixation of the gear plate.

[0014] Preferably, a locking nut is installed on the outer side of the gear disk, and the locking nut is used to abut against the outer end face of the gear disk.

[0015] By adopting the above technical solution, a locking nut can be further installed on the outside of the gear disc to improve the fixing effect of the gear disc.

[0016] Secondly, this application provides a correction mounting method for an encoder gear plate mounting structure, employing the following technical solution:

[0017] A method for corrective mounting of an encoder toothed disc mounting structure includes the following steps:

[0018] The gear plate is fitted onto the spindle;

[0019] Install the clamping member into the oblique threaded hole, ensuring that the clamping member contacts the spindle but is not clamped to the spindle;

[0020] Rotate the spindle at a constant speed and use a dial indicator to determine the spindle's correction speed;

[0021] Rotate the main shaft at a constant speed according to the aforementioned correction speed, use a laser interferometer to detect, and compare the position deviation angle fed back by the positioning accuracy curve with the mechanical angle of the actual gear plate installation position to determine the position of the gear plate deviation angle.

[0022] The runout of the outer circle of the gear disk at the deviation angle position is detected by a dial indicator, and the actual runout deviation value of the gear disk at the deviation angle position is obtained.

[0023] Adjust the tightness of the clamping parts near the deviation angle position. During the adjustment process, rotate the main shaft at the correction speed and observe the change in the value of the dial indicator at the deviation angle position.

[0024] The angle deviation is adjusted using a laser interferometer until it is brought within the acceptable range.

[0025] Tighten the remaining clamping parts to the set torque to eliminate the diameter gap between the outer circle of the main shaft and the inner hole of the gear plate.

[0026] By adopting the above technical solution, after the gear plate is installed on the spindle, the set screws are first installed into the oblique threaded holes and gently fixed, ensuring that each setter contacts the outer edge of the spindle but is not tightly clamped to the spindle. Then, the positioning accuracy curve fed back by the laser interferometer is used to determine the deviation angle position on the gear plate, and a dial indicator is used to detect the actual runout value at that deviation angle position, thus determining the value of the gear plate's outer diameter runout that needs adjustment. Next, the setter near the deviation angle is located, and the tightness of the setter is adjusted. After adjustment, the outer diameter runout value displayed on the dial indicator at that deviation angle position is observed by rotation to verify whether the adjustment is correct. If over-adjustment or under-adjustment is found, the tightness of the setter is adjusted until the gear plate and spindle are coaxial. The adjustment result is then verified again using the laser interferometer until the angle deviation value is adjusted to the acceptable range. Finally, the remaining setters are fixed. Tightening the gear disc with the set torque reduces the probability of disc misalignment due to external factors during subsequent use. The clamping component not only secures the gear disc to the spindle but also adjusts the disc's installation accuracy when errors exist. Specifically, this application can eliminate the diameter gap between the gear disc's inner hole and the spindle's outer diameter while adjusting the outer diameter runout, ensuring the gear disc is error-free and fixed to the spindle. This improves the gear disc's installation accuracy and the encoder's feedback accuracy for spindle speed and angular position. Furthermore, by directly fixing the gear disc to the spindle, the gear disc holder is eliminated, saving valuable space on the already compact spindle. This facilitates gear disc installation and allows for direct detection of the gear disc's outer diameter runout using a dial indicator, directly obtaining the runout without indirectly reflecting it using the gear disc holder's runout, resulting in higher detection accuracy.

[0027] Preferably, the spindle is rotated at a constant speed, and the spindle's correction speed is determined using a dial indicator, including the following steps:

[0028] Place the probe ball of the dial indicator against the tip circle of any tooth of the gear plate;

[0029] Rotate the main shaft so that when the probe ball of the dial indicator leaves the outer surface of the first tooth, it immediately falls back down and lands exactly on the outer surface of the second tooth of the gear plate adjacent to the first tooth, thus determining the spindle's correction speed.

[0030] By adopting the above technical solution, the speed is repeatedly adjusted so that the probe ball of the dial indicator falls exactly from the outer surface of the first tooth to the outer circular surface of the second tooth. Once the rotation speed at this point is determined, the correction speed can be used for subsequent testing.

[0031] Preferably, after determining the spindle's correction speed, the gear disk is rotated one revolution according to the correction speed, and the runout of the outer circle of each tooth of the gear disk is detected using a dial indicator.

[0032] By adopting the above technical solution, the runout of each tooth of the gear disk can be determined by rotating the gear disk one revolution at a predetermined correction speed. This method is convenient for detection and allows for direct detection of the runout of the gear disk's outer circle, eliminating the need for indirect measurement of the runout of the gear disk's outer circle using the runout of the gear disk seat. This improves the detection accuracy of the gear disk's outer circle runout and further enhances the installation accuracy of the gear disk.

[0033] Preferably, all clamping parts are tightened simultaneously using a torque wrench with the preset torque, and then a locking nut is installed on the main shaft so that the inner end face of the locking nut is pressed against the outer end face of the gear plate.

[0034] By adopting the above technical solution, all clamping parts are tightened at the same time, which can eliminate the diameter gap at each position simultaneously and evenly, reduce the probability of the gear plate becoming eccentric again during the tightening of the clamping parts, and tighten the clamping parts with the set torque to avoid the clamping parts protruding too much and causing damage to the spindle when the torque of the clamping parts is too large.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. This application provides a method by creating an oblique threaded hole at a 40°~50° angle on the end face of the gear disc and setting a clamping member that mates with the oblique threaded hole. This allows the clamping member to be installed in the oblique threaded hole and the spindle to clamp it with a set torque. This eliminates the need for a gear disc seat, thus fixing the gear disc on the spindle. This makes installation more convenient and saves the already compact space on the spindle. The oblique clamping member has both radial and axial limiting functions, resulting in better fixing of the gear disc. It also makes it easy to adjust the tightness of the clamping member at the corresponding position. When the gear disc is installed off-center, it is easy to adjust and correct the installation position of the gear disc, thereby improving the detection accuracy of the encoder.

[0037] 2. This application detects the installation accuracy (eccentricity) of the gear disc after it is mounted on the spindle and before the clamping parts are tightened. Specifically, a laser interferometer is used to find the deviation angle position, and the tightness of the clamping parts near the deviation angle position is adjusted. A dial indicator is used to detect the runout of the outer circle of the gear disc at the adjusted deviation angle position. When the spindle is rotated at the correction speed and the outer circle of the gear disc runs up and down uniformly, the adjustment is verified again using a laser interferometer. When the adjustment angle deviation value is adjusted to within the qualified range, the correction adjustment of the gear disc installation accuracy can be achieved simultaneously during the installation process, thus improving the positioning accuracy of the gear disc.

[0038] 3. By mounting the gear plate directly on the spindle, the outer diameter runout of the gear plate can be directly detected using a dial indicator, resulting in higher detection accuracy. Attached Figure Description

[0039] Figure 1This is a schematic diagram of the structure of the gear disc in the background art.

[0040] Figure 2 This is a schematic diagram of the assembly of the gear disc in the background art.

[0041] Figure 3 This is a schematic diagram of the gear disk in the encoder gear disk mounting structure of this application.

[0042] Figure 4 This is a schematic diagram of the assembly of the gear disk in the encoder gear disk mounting structure of this application.

[0043] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0044] Figure 6 This is an installation flowchart of the correction installation method for the encoder tooth disk mounting structure of this application.

[0045] Figure 7 This is a schematic diagram of using a dial indicator to detect the runout of the outer circle of a gear plate.

[0046] Explanation of reference numerals in the attached drawings: 01, gear plate seat; 02, spindle; 03, fixed threaded hole; 04, bolt; 1, gear plate; 11, first tooth; 12, second tooth; 2, oblique threaded hole; 3, clamping component; 4, lock nut; 5, dial indicator; 51, probe ball. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 3-7 This application will be described in further detail.

[0048] This application discloses an encoder gear plate mounting structure. (Refer to...) Figure 3 , Figure 4 and Figure 5 The encoder gear plate mounting structure includes a gear plate 1 and a clamping member 3. The end face of the gear plate 1 has multiple oblique threaded holes 2 for the clamping member 3 to extend into. All oblique threaded holes 2 are 3-M5 threaded holes, and the multiple oblique threaded holes 2 are spaced apart around the axis of the gear plate 1, with at least three oblique threaded holes 2 provided. This application uses an example with three oblique threaded holes 2 for illustration. The axis of each oblique threaded hole 2 is set at an angle of 40°~50° to the axis of the gear plate 1, and the angles of each oblique threaded hole 2 are consistent. During installation, the gear plate 1 is fitted onto the spindle 02, ensuring that the oblique threaded holes 2 descend from the outer end face to the inner end face of the gear plate 1. Then, the clamping member 3 is passed through the oblique threaded holes 2 from the outside to the inside, and a torque wrench is used to tighten the clamping member 3 with a set torque, so that the head of the clamping member 3 is pressed tightly against the outer edge of the spindle 02 with a set pressure.

[0049] The angled threaded hole 2 will not damage the teeth of the gear disk 1. Using the set torque to install the clamping member 3 also ensures that the outer edge of the spindle 02 will not be worn. The gear disk 1 can be fixed on the spindle 02 without using the gear disk seat 01, reducing the space on the spindle 02 and facilitating the installation of the gear disk 1. Simultaneously, the angled clamping member 3 generates a horizontal component force and a vertical component force, meaning it can fix the gear disk 1 axially and radially, limiting the radial runout and axial movement of the gear disk 1, reducing the probability of the gear disk 1 shifting under various influences, and improving the installation accuracy of the gear disk 1. Due to the axial component force generated by the clamping member 3, the locking nut 4 can be eliminated by removing the gear disk seat 01, further reducing the space occupied on the spindle 02, making it suitable for installation on a small-space spindle 02. If there is enough space in the spindle 02, a locking nut 4 can also be installed so that the inner end face of the locking nut 4 abuts against the outer end face of the gear 1. The installation of the locking nut 4 can further restrict the axial movement of the gear 1 and reduce the probability of axial displacement of the gear 1.

[0050] In order to balance the horizontal and vertical components of the clamping member 3, and to balance the force between the head of the clamping member 3 and the main shaft 02, this application sets the angle between the axis of the oblique threaded hole 2 and the axis of the gear plate 1 to 45°, which facilitates the machining of the oblique threaded hole 2 and the installation of the clamping member 3.

[0051] To facilitate the assembly of the gear disk 1 and the main shaft 02, a diameter gap of 0.01-0.02 mm exists between the inner diameter of the gear disk 1 and the outer diameter of the main shaft 02. That is, the gear disk 1 and the main shaft 02 are installed using a small clearance fit. After installing multiple clamping parts 3, the diameter gap can be eliminated, thus limiting the radial offset of the gear disk 1 and reducing the probability of the encoder's detection accuracy being affected by the offset of the gear disk 1.

[0052] To reduce the probability of wear on the spindle 02 caused by hard contact between the clamping member 3 and the spindle 02 due to spindle vibration, the clamping member 3 in this application uses a copper internal hexagonal set screw. Copper itself has good ductility, allowing the set screw to stretch or contract with the spindle 02 during vibration, effectively reducing the probability of wear on the outer edge of the spindle 02 due to hard contact. Simultaneously, the set screw ensures a tight fit between the gear 1 and the spindle 02, achieving a secure fixation of the gear 1 and reducing the probability of subsequent misalignment of the gear 1.

[0053] The implementation principle of the encoder gear plate mounting structure in this application embodiment is as follows: During installation, the gear plate 1 is first fitted onto the main shaft 02. Then, a torque wrench is used to install set screws in each oblique threaded hole 2, so that the head of the set screw is pressed against the outer edge of the main shaft 02 with a set pressure. After that, the locking nut 4 is screwed onto the main shaft 02, so that the inner end face of the locking nut 4 abuts against the outer end face of the gear plate 1. The gear plate 1 can be installed without the aid of the gear plate seat 01, reducing the space occupied on the already compact main shaft 02, which is suitable for installation on a small-space main shaft 02. By directly installing the gear plate 1 on the main shaft 02, the mechanical accuracy of the gear plate 1 can be directly detected by the outer diameter runout of the gear plate 1 through the dial indicator 5, which is beneficial to improving the detection accuracy of the gear plate 1.

[0054] This application also discloses a method for correcting the mounting of an encoder toothed disc mounting structure. (Refer to...) Figure 6 and Figure 7 The correction installation method for the encoder gear plate mounting structure includes the following steps:

[0055] S1: Install gear 1: Fit gear 1 onto spindle 02.

[0056] S2: Install the clamping part 3: Install the clamping part 3 into the oblique threaded hole 2, and ensure that the clamping part 3 is in contact with the spindle 02 but not clamped to the spindle 02, so as to leave room for future adjustment.

[0057] S3: Rotate the main shaft 02 at a constant speed, and use dial indicator 5 to determine the correction speed of the main shaft 02. Specifically, it is necessary to adjust the speed at which two adjacent teeth of the gear disc 1 rotate to be the same as the rebound frequency of the dial indicator 5, including the following steps:

[0058] S31: Place the probe ball 51 of the dial indicator 5 against the tip circle of any tooth (named the first tooth 11) of the toothed disc 1.

[0059] S32: Rotate the main shaft 02 so that when the probe ball 51 of the dial indicator 5 leaves the outer circular surface of the first tooth 11, it immediately falls back down and lands exactly on the outer circular surface of the second tooth 12 adjacent to the first tooth 11 on the gear plate 1. Determine that the rotation speed of the main shaft 02 at this time is the correction speed.

[0060] S33: Rotate the main shaft 02 at a constant speed according to the correction speed, and use dial indicator 5 to detect the runout values ​​of each angle on the outer surface of the gear plate 1.

[0061] S4: Rotate the main shaft 02 at a uniform speed according to the correction speed. Use a laser interferometer to detect the position deviation angle. Compare the position deviation angle fed back by the positioning accuracy curve with the mechanical angle of the actual installation position of the gear disk 1 to determine the deviation angle position of the gear disk 1. The laser interferometer is a precision instrument that uses optical components (including angle reflectors and angle interferometers; in this application, the laser interferometer, angle reflectors, and angle interferometers are collectively referred to as a laser system) for angle detection. When the angle reflector rotates relative to the angle interferometer, it will cause a change in the optical path difference between the two measurements, and the optical path difference signal will be fed back to the computer, which will be converted into an angle measurement value or angle error by the software. That is to say, when there is a deviation in the installation of the gear disk 1, the optical path difference at the deviation angle position will change. The angle of deviation can be seen by using the positioning accuracy curve fed back by the computer, thereby determining the deviation angle position on the gear disk 1. It includes the following steps:

[0062] S41: Installation and calibration of the laser system: Install the angle mirror on the main shaft 02, then arrange the laser interferometer, angle interferometer, and angle reflector in a line, and make the axes of the laser interferometer, angle interferometer, and linear reflector coincide with the axis of the main shaft 02. Repeatedly adjust the laser interferometer so that the light emitted by the angle interferometer and angle reflector always coincides on the lens of the laser interferometer.

[0063] S42: Encoder zeroing and laser system zeroing.

[0064] S43: Run the CNC program and rotate the spindle 02 according to the correction speed. The computer collects data. When the spindle 02 reaches the initial target position, the laser reading is recorded. The spindle 02 rotates and drives the gear plate 1. The encoder detects the speed and rotation angle of the spindle 02 and feeds the data back to the computer.

[0065] S44: The main axis 02 moves to the second target with a set step distance (e.g., 5°), and the angle reflector rotates in the opposite direction with the set step distance.

[0066] S45: The system combines the readings from the laser interferometer and the angle mirror to record the position error of the main axis O2 at that angle.

[0067] S46: Continue rotating spindle 02 according to the correction angle, measure and draw the positioning accuracy diagram of spindle 02.

[0068] S47: Determine the angle at which the installation error occurs on the gear disk 1 based on the positioning accuracy diagram and the values ​​fed back by the encoder, that is, determine the position of the gear disk 1 at this angle as the deviation angle position.

[0069] S5: Use dial indicator 5 to detect the runout of the outer circle of the gear disk 1 at the deviation angle position, and obtain the actual runout deviation value of the gear disk 1 at the deviation angle position. The specific detection method is the same as S3.

[0070] S6: Adjust the tightness of the clamping member 3 near the deviation angle position according to the runout deviation value. Given the unknown machining accuracy of the gear disc 1 (including the machining accuracy of the addendum circle, pitch circle, and root circle), assume that the machining accuracy of the gear disc 1 is qualified, meaning that the addendum circle, pitch circle, and root circle of each tooth on the gear disc 1 are coaxial with the inner hole of the gear disc 1. When adjusting the tightness of the clamping member 3, use the value displayed by the dial indicator 5 to adjust the position of the gear disc 1 so that the axis of the inner hole of the gear disc 1 coincides with the axis of the spindle 02. Specifically, the inspector judges whether the clamping member 3 is too loose or too tight based on the runout deviation value, and uses a wrench to adjust the tightness of the clamping member 3. During the adjustment process, rotate the spindle 02 at the correction speed while observing the change in the value of the dial indicator 5 at the deviation angle position to display the runout of the outer circle of the adjusted gear disc 1. When the outer circle of the gear disc 1 runs evenly, it indicates that the adjustment of the clamping member 3 is in place. At this time, the gear disc 1 and the spindle 02 can be considered coaxial, and the installation accuracy of the gear disc 1 can be considered qualified.

[0071] S7: Use the laser interferometer to check the adjusted angle deviation until the angle deviation value is adjusted to within the acceptable range. After the adjustment is in place, use the laser interferometer again to check the encoder reading accuracy through the second displayed positioning accuracy curve. The encoder's reading accuracy is used to verify the installation accuracy of gear disk 1. If the laser interferometer's test result is unacceptable or there is still an error at a certain angle, it indicates that the machining accuracy of gear disk 1 does not meet the requirements. In this case, further adjustment to make the gear disk and spindle coaxial is useless. At this time, it is necessary to adjust the deviation angle position of gear disk 1 so that there is a certain degree of eccentricity between gear disk 1 and spindle O2. The machining error of gear disk 1 is compensated by adjusting the installation position of gear disk 1, so that the encoder's final test result is closest to the actual rotation of the spindle and the highest test accuracy. When adjusting the installation accuracy of the gear disk, continue to repeat S5-S6 above until the laser interferometer detects that the encoder's test accuracy is within the acceptable range.

[0072] S8: Tighten the remaining clamping parts 3 to the set torque to eliminate the diameter gap between the outer diameter of the main shaft 02 and the inner hole of the gear plate 1. Specifically, use a torque wrench to tighten the remaining clamping parts 3 simultaneously.

[0073] The implementation principle of the correction installation method for an encoder gear disk mounting structure in this application embodiment is as follows: After the gear disk 1 is installed on the main shaft 02, the set screw is first installed into the oblique threaded hole 2 and gently fixed, that is, ensuring that each clamping part 3 is in contact with the outer edge of the main shaft 02 but not tightly clamped to the main shaft 02. Then, the probe ball 51 of the dial indicator 5 is abutted against the tooth tip circle of any tooth, and the main shaft 02 is rotated at a uniform speed until the probe ball 51 bounces off the tooth tip circle of one tooth and lands on the tooth tip circle of the adjacent tooth. The rotation speed of the main shaft 02 at this time is determined to be the correction speed. Then, the main shaft 02 is rotated at the correction speed. The rotation speed and rotation angle of the main shaft 02 fed back by the encoder are compared with the positioning accuracy curve of the outer circle of the gear disk 1 generated by the laser interferometer to determine the angle at which the installation error (eccentricity) occurs on the gear disk 1. The position of the deviation angle is determined. Then, the actual runout value at the deviation angle position is detected by the dial indicator 5 to determine the value of the runout of the outer circle of the gear disk 1 that needs to be adjusted. Then, the clamping part 3 near the deviation angle is located and the tightness of the clamping part 3 is adjusted. After the adjustment is completed, the runout value of the outer circle at the deviation angle position is observed by rotating the gear disk 1 to verify whether the adjustment is in place. If the adjustment is too much or too little, the clamping part is adjusted until the adjustment is completed, that is, the gear disk 1 and the main shaft 02 are coaxial. Then, the adjustment result is verified again by the laser interferometer until the angle deviation value is adjusted to the qualified range. Finally, the remaining clamping parts 3 are tightened synchronously with the set torque to achieve low error installation and positioning of the gear disk 1, which facilitates the improvement of the overall detection accuracy of the encoder.

[0074] 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 encoder toothed disc mounting structure, characterized in that: The device includes a geared disc (1) and a clamping member (3). The end face of the geared disc (1) is provided with a plurality of oblique threaded holes (2). The plurality of oblique threaded holes (2) are arranged at intervals around the axis of the geared disc (1), and the axis of each oblique threaded hole (2) is arranged at an angle of 40° to 50° with the axis of the geared disc (1). The clamping member (3) is used to pass through the oblique threaded holes (2) from the outside to the inside, and the head of the clamping member (3) is used to clamp against the outer edge of the main shaft (02) under a set torque.

2. The encoder gear plate mounting structure according to claim 1, characterized in that: There is a diameter gap of 0.01-0.02 mm between the gear disc (1) and the main shaft (02). The circumferential diameter gap is eliminated after each of the clamping parts (3) is installed.

3. The encoder gear plate mounting structure according to claim 1, characterized in that: The clamping component (3) uses a copper internal hexagonal set screw.

4. The encoder gear plate mounting structure according to claim 1, characterized in that: The angle between the axis of the oblique threaded hole (2) and the axis of the gear plate (1) is set to 45°.

5. The encoder gear mounting structure according to claim 1, characterized in that: A locking nut (4) is also installed on the outer side of the gear disc (1), and the locking nut (4) is used to abut against the outer end face of the gear disc (1).

6. A method for correcting the alignment of an encoder toothed disc mounting structure, characterized in that: The encoder gear mounting structure according to claim 1 includes the following steps: The gear disc (1) is fitted onto the main shaft (02); Install the clamping part (3) into the oblique threaded hole (2), and ensure that the clamping part (3) contacts the spindle (02) but does not clamp the spindle (02); Rotate the main shaft (02) at a constant speed and use a dial indicator (5) to determine the correction speed of the main shaft (02); Rotate the main shaft (02) at a constant speed according to the aforementioned correction speed, use a laser interferometer to detect, and compare the position deviation angle fed back by the positioning accuracy curve with the mechanical angle of the actual gear plate (1) installation position to determine the deviation angle position of the gear plate (1); The runout of the outer circle of the toothed disc (1) at the deviation angle position is detected by a dial indicator (5), and the actual runout deviation value of the toothed disc (1) at the deviation angle position is obtained. Adjust the tightness of the clamping part (3) near the deviation angle position. During the adjustment process, rotate the main shaft (02) at the correction speed and observe the change of the value of the dial indicator (5) at the deviation angle position. The angle deviation is adjusted using a laser interferometer until it is brought within the acceptable range. Tighten the remaining clamping parts (3) to the set torque to eliminate the diameter gap between the outer circle of the main shaft (02) and the inner hole of the gear plate (1).

7. The correction mounting method for the encoder gear plate mounting structure according to claim 6, characterized in that: Rotate the main shaft (02) at a constant speed and determine the correction speed of the main shaft (02) using a dial indicator (5), including the following steps: The probe ball (51) of the dial indicator (5) is placed against the tip circle of any tooth of the toothed disc (1); Rotate the main shaft (02) so that when the probe ball (51) of the dial indicator (5) leaves the outer circular surface of the first tooth (11), it immediately falls back down and lands exactly on the outer circular surface of the second tooth (12) of the gear plate (1) adjacent to the first tooth (11), thereby determining the correction speed of the main shaft (02).

8. The correction mounting method for the encoder gear plate mounting structure according to claim 7, characterized in that: After determining the correction speed of the main shaft (02), rotate the gear disk (1) one revolution according to the correction speed, and use a dial indicator (5) to detect the runout of the outer circle of each tooth of the gear disk (1).

9. The correction mounting method for the encoder gear plate mounting structure according to claim 6, characterized in that: Tighten all the clamping parts (3) simultaneously using a torque wrench with a preset torque, and then install a locking nut (4) on the main shaft (02) so that the inner end face of the locking nut (4) is pressed against the outer end face of the gear plate (1).

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