Method for detecting and adjusting a planetary mechanism

Abstract

This invention discloses a detection and adjustment method for planetary motion mechanisms to solve the problem of low adjustment efficiency caused by relying on the experience of assembly and adjustment personnel when existing planetary motion mechanisms experience jamming during operation. Specifically, it includes: Step 1, establishing a reference coordinate system with the axis of the drive motor output shaft as the Z0 axis; Step 2, measuring the runout ΔT of the driven gear during circular motion and determining whether it meets the preset accuracy constraint. If not, marking the runout position of the driven gear and adjusting the driven gear according to the runout position; Step 3, establishing a coordinate system with the central axis of the worm gear as the Z1 axis; Step 4, aligning the Z1 axis with the Z0 axis, and recording its displacement as the measured center distance d1 between the driving gear and the driven gear; Step 5, determining whether the measured center distance d1 meets the tolerance accuracy constraint. If not, correcting the center distance between the driving gear and the driven gear.

Description

Technical Field

[0001] This invention relates to a detection and adjustment method for a planetary motion mechanism. Background Technology

[0002] A planetary motion mechanism is a compact device used in aerospace optical imaging systems to automatically switch between light-shielding baffles. For example... Figure 1 As shown, a conventional planetary motion mechanism includes an optical platform 01, a support assembly 02 mounted on the optical platform 01, a drive motor 03 mounted on the support assembly 02, a drive gear 04 fixedly mounted on the output shaft of the drive motor 03, a driven gear 05 meshing with the drive gear 04, and a worm gear 06 coaxially mounted at the center of the driven gear 05; the central axis of the worm gear 06 is parallel to the axis of the output shaft of the drive motor 03; the drive motor 03 is mounted on the support assembly 02 by fastening screws 07; the worm gear 06 is rotatably connected to the support assembly 02 by an adapter assembly 08; the position of the driven gear 05 can be adjusted by adjusting the adapter assembly 08.

[0003] In this planetary motion mechanism, the fit between the driving gear 04 and the driven gear 05 largely depends on machining precision. However, in actual use, changes in the external temperature environment can easily cause jamming between the gears, preventing smooth operation and hindering the automatic switching of the light-shielding baffle connected to the worm gear 06. In existing technology, when the driving gear 04 and driven gear 05 jam, the driven gear 05 is usually adjusted based on the experience of the assembler. However, due to the lack of precise adjustment data, accurate adjustment is impossible, resulting in very low adjustment efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a detection and adjustment method for planetary motion mechanisms, in order to solve the technical problem that existing planetary motion mechanisms rely on the experience of assembly and adjustment personnel to adjust the motion mechanism when jamming occurs during operation. Due to the lack of precise adjustment data, accurate adjustment is impossible, resulting in low adjustment efficiency.

[0005] To achieve the above objectives, the present invention provides a detection and adjustment method for a planetary motion mechanism, characterized by comprising the following steps:

[0006] Step 1: Establish a reference coordinate system X0-Y0-Z0 with the axis of the drive motor output shaft as the Z0 axis and the intersection of the Z0 axis and the optical platform as the origin;

[0007] Step 2: Measure the runout ΔT during the circular motion of the driven gear, and determine whether the runout ΔT satisfies the preset accuracy constraint ΔT∈[T0±ε], where T0 is the theoretical runout and ε is the first accuracy control parameter; when At that time, mark the yaw position of the driven gear, adjust the attitude of the worm gear according to the yaw position, and then adjust the driven gear until ΔT∈[T0±ε];

[0008] Step 3: Establish a coordinate system X1-Y1-Z1 with the central axis of the worm gear as the Z1 axis and the intersection of the Z1 axis and the optical platform as the origin;

[0009] Step 4: Move the worm gear until the Z1 axis coincides with the Z0 axis. The displacement is recorded as the measured value d1 of the center distance between the driving gear and the driven gear.

[0010] Step 5: Determine whether the measured center distance d1 meets the tolerance accuracy constraint. Where d0 is the theoretical value of the center distance between the driving gear and the driven gear. For the second precision control parameter; when At that time, the center distance between the driving gear and the driven gear is corrected until...

[0011] Furthermore, in step 5, the specific correction process is as follows:

[0012] a. Calculate the center distance deviation Δd = |d0-d1| between the measured center distance d1 and the theoretical center distance d0;

[0013] b. Measure the diameter of the mounting hole d′0 of the fastening screw on the bracket assembly and the outer diameter of the screw d′1, and calculate the deviation between the two Δd′=|d′0-d′1|;

[0014] c. Comparison: When Δd > Δd′, the screw of the fastening screw is over-refined by an amount of Δx = Δd - Δd′. Then, the drive motor is fixed to the bracket assembly with the fastening screw, and the process is repeated until...

[0015] When Δd < Δd′, slightly move the drive motor and re-secure the drive motor to the bracket assembly with the fastening screws, then return to step a until...

[0016] This allows for the correction of the center distance between the driving gear and the driven gear.

[0017] Furthermore, in step 2:

[0018] The first precision control parameter ε is 0.005 mm;

[0019] The adjustment of the worm gear's attitude is specifically achieved by adjusting the worm gear's attitude on the support assembly through an adapter component.

[0020] Furthermore, in step 5:

[0021] The second precision control parameter It is 0.01mm;

[0022] The specific theoretical value of the center distance d0 is as follows:

[0023] d0 = 1 / 2m(N1 + N2);

[0024] Where m is the gear module, N1 is the number of teeth on the driving gear, and N2 is the number of teeth on the driven gear.

[0025] Furthermore, in step 1, the specific operation of taking the axis of the drive motor output shaft as the Z0 axis is as follows:

[0026] A first axis lead-out device coaxial with the drive motor is set at the upper end of the drive gear; a coaxial measuring device is fixedly installed on the optical platform, and the Z0 axis is determined by the coaxial measuring device and the first axis lead-out device.

[0027] Furthermore, in step 4, the specific operation of moving the worm gear until the Z1 axis coincides with the Z0 axis is as follows:

[0028] A second axis lead-out device coaxial with the worm is set at the upper end of the worm; the worm is moved so that the Z1 axis coincides with the Z0 axis through the coaxial measuring device and the second axis lead-out device.

[0029] Furthermore, the displacement mentioned in step 4 is measured using a grating ruler, and the specific operation is as follows:

[0030] A movable platform is set on the optical platform; a support assembly is set on the movable platform; the main scale of the grating ruler is fixedly installed on the optical platform, and its secondary scale is installed on the movable platform, thereby measuring the displacement.

[0031] Furthermore, in step 2, the attitude of the worm gear is adjusted specifically through the adapter assembly.

[0032] Furthermore, in step 2, the runout amount ΔT during the circular motion of the driven gear is measured by establishing a runout measurement system.

[0033] Furthermore, the movable platform is a four-dimensional adjustment platform.

[0034] The beneficial effects of this invention are:

[0035] 1. The detection and adjustment method provided by this invention can accurately obtain precise adjustment data, eliminating the need for adjustment based on the experience of the assembly and adjustment personnel, thereby improving adjustment efficiency and accuracy.

[0036] 2. This invention establishes a reference coordinate system for the Z0 axis by fixing a coaxial measuring device on an optical platform, thereby providing a reference for the measured center distance between the driving gear and the driven gear, making the measured center distance more accurate.

[0037] 3. The present invention uses a runout measurement system to detect the runout of the driven gear coaxially connected to the worm gear. It can accurately measure the corresponding runout data, which is beneficial to accurately adjust the driven gear, making the gear adjustment more precise and efficient.

[0038] 4. This invention uses a grating ruler and a movable platform to measure the displacement of the planetary motion mechanism, resulting in more accurate and efficient measurement data. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a planetary motion mechanism;

[0040] Figure 2 This is a flowchart of the detection and adjustment process in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the reference coordinate system established in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the runout measurement structure of the driven gear in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram showing the dimensions of the mounting holes and the screw rods on the fastening screws and their support assembly in an embodiment of the present invention.

[0044] Figure label:

[0045] 01-Optical platform, 02-Support assembly, 03-Drive motor, 04-Drive gear, 05-Driven gear, 06-Worm gear, 07-Fasting screw, 08-Adapter assembly; 1-First shaft lead-out device, 2-Second shaft lead-out device, 3-Grating ruler, 4-Movable platform. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] This invention provides a detection and adjustment method for a planetary motion mechanism, such as... Figure 2 As shown, it includes the following steps:

[0048] Step 1, as follows Figure 3 and Figure 1 As shown, a first shaft center lead-out device 1 coaxial with the drive motor 03 is provided on the upper end of the drive gear 04; a coaxial measuring device is fixedly installed on the optical platform 01. The output end of the coaxial measuring device can output a reference optical axis. In this embodiment, the output optical axis of the coaxial measuring device is aligned with the center of the first shaft center lead-out device 1. The axis of the output shaft of the drive motor 03, that is, the output optical axis of the coaxial measuring device, is taken as the Z0 axis, and the intersection of the Z0 axis and the optical platform 01 is taken as the origin to establish a reference coordinate system X0-Y0-Z0.

[0049] Step 2, as follows Figure 4 and Figure 1 As shown, a runout measurement system is established to measure the runout ΔT during the circular motion of the driven gear 05, and to determine whether the runout ΔT satisfies the preset accuracy constraint ΔT∈[T0±ε], where T0 is the theoretical runout and ε is the first accuracy control parameter; the first accuracy control parameter ε is 0.005mm; when At that time, mark the yaw position of the driven gear 05, adjust the attitude of the worm 06 according to the yaw position, and then adjust the driven gear 05 until ΔT∈[T0±ε]; the attitude of the worm 06 is adjusted by adjusting the attitude of the worm 06 on the support assembly 02 through the adapter assembly 08.

[0050] Step 3: Establish a coordinate system X1-Y1-Z1 with the central axis of the worm 06 as the Z1 axis and the intersection of the Z1 axis and the optical platform 01 as the origin;

[0051] Step 4: Set a movable platform 4, preferably a four-dimensional adjustment platform, on the optical platform 01; set the support assembly 02 on the movable platform 4; and set a grating ruler 3 on the optical platform 01. The main scale of the grating ruler 3 is fixedly installed on the optical platform 01, and its secondary scale is installed on the movable platform 4; at the same time, set a second axis lead-out device 2 coaxial with the worm 06 at the upper end of the worm 06; move the worm 06 by the movable platform 4 so that the output optical axis of the coaxial measuring device corresponds to the center of the second axis lead-out device 2, so that the Z1 axis coincides with the Z0 axis. The grating ruler 3 records the displacement, which is recorded as the measured value d1 of the center distance between the driving gear 04 and the driven gear 05.

[0052] Step 5: Determine whether the measured center distance d1 meets the tolerance accuracy constraints. in This refers to the second precision control parameter; the second precision control parameter It is 0.01mm; d0 is the theoretical value of the center distance between the driving gear 04 and the driven gear 05. The specific theoretical value of the center distance d0 is as follows:

[0053] d0 = 1 / 2mN1 + N2;

[0054] Where m is the gear module, N1 is the number of teeth of the driving gear 04, and N2 is the number of teeth of the driven gear 05.

[0055] when At that time, the center distance between the driving gear 04 and the driven gear 05 is corrected until...

[0056] like Figure 5 As shown, the specific correction process is as follows:

[0057] a. Calculate the center distance deviation Δd = |d0-d1| between the measured center distance d1 and the theoretical center distance d0;

[0058] b. Measure the diameter d′0 of the mounting hole of the fastening screw 07 on the bracket assembly 02 and the outer diameter d′1 of the screw 07, and calculate the deviation between the two Δd′=|d′0-d′1|;

[0059] c. Comparison: When Δd > Δd′, the screw of fastening screw 07 is over-refined by an amount of Δx = Δd - Δd′. Then, the drive motor 03 is fixed to the bracket assembly 02 with fastening screw 07. Return to step a until...

[0060] When Δd < Δd′, the micro-movement drive motor 03 is moved, and the drive motor 03 is re-fixed to the bracket assembly 02 with the fastening screw 07. The process returns to step a until...

[0061] This allows for the correction of the center distance between the driving gear 24 and the driven gear 25.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for detecting and adjusting a planetary motion mechanism, characterized in that, Includes the following steps: Step 1: Establish a reference coordinate system X0-Y0-Z0 with the axis of the output shaft of the drive motor (03) as the Z0 axis and the intersection of the Z0 axis and the optical platform (01) as the origin; Step 2: Measure the runout ΔT of the driven gear (05) during its circular motion, and determine whether the runout ΔT meets the preset accuracy constraint. Where T0 is the theoretical sway. The first precision control parameter; when At that time, the yaw position of the driven gear (05) is marked, and the attitude of the worm (06) is adjusted according to the yaw position, thereby adjusting the driven gear (05) until... ; Step 3: Establish a coordinate system X1-Y1-Z1 with the central axis of the worm (06) as the Z1 axis and the intersection of the Z1 axis and the optical platform (01) as the origin; Step 4: Move the worm (06) until the Z1 axis coincides with the Z0 axis. The displacement is recorded as the measured value d1 of the center distance between the driving gear (04) and the driven gear (05). Step 5: Determine whether the measured center distance d1 meets the tolerance accuracy constraint. Where d0 is the theoretical value of the center distance between the driving gear (04) and the driven gear (05), For the second precision control parameter; when At that time, the center distance between the driving gear (04) and the driven gear (05) is corrected until... The specific correction process is as follows: a. Calculate the center distance deviation between the measured center distance d1 and the theoretical center distance d0. ; b. Measure the diameter of the mounting hole of the fastening screw (07) on the bracket assembly (02). The outer diameter of the screw of the fastening screw (07) Calculate the deviation between the two. ; c. Comparison: When At that time, the screw of the fastening screw (07) was rubbed, and the rubbing amount was... Then, use the fastening screws (07) to fix the drive motor (03) onto the bracket assembly (02), return to step a, until ; when At that time, the micro-movement drive motor (03) is moved, and the drive motor (03) is re-fixed to the bracket assembly (02) with the fastening screw (07), and the process returns to step a until... ; This achieves the correction of the center distance between the driving gear (24) and the driven gear (25).

2. The detection and adjustment method for a planetary motion mechanism according to claim 1, characterized in that, In step 2: First precision control parameter It is 0.005 mm; The attitude of the adjusting worm (06) is specifically adjusted by the adapter (08) on the support assembly (02).

3. The detection and adjustment method for a planetary motion mechanism according to claim 2, characterized in that, In step 5: The second precision control parameter It is 0.01 mm; The specific theoretical value of the center distance d0 is as follows: d0 = ½ m(N1 + N2); Where m is the gear module, N1 is the number of teeth of the driving gear (04), and N2 is the number of teeth of the driven gear (05).

4. The detection and adjustment method for a planetary motion mechanism according to claim 3, characterized in that, In step 1, the specific operation of taking the axis of the output shaft of the drive motor (03) as the Z0 axis is as follows: A first axis lead-out device (1) coaxial with the drive motor (03) is provided at the upper end of the drive gear (04); a coaxial measuring device is fixedly installed on the optical platform (01), and the Z0 axis is determined by the coaxial measuring device and the first axis lead-out device (1).

5. The detection and adjustment method for a planetary motion mechanism according to claim 4, characterized in that, In step 4, the specific operation of moving the worm gear (06) until the Z1 axis coincides with the Z0 axis is as follows: A second axis lead-out device (2) coaxial with the worm (06) is set at the upper end of the worm (06); the worm (06) is moved and the Z1 axis is made to coincide with the Z0 axis by means of the coaxial measuring device and the second axis lead-out device (2).

6. The detection and adjustment method for a planetary motion mechanism according to claim 5, characterized in that, The displacement mentioned in step 4 is measured by a grating ruler (3), and the specific operation is as follows: A movable platform (4) is set on an optical platform (01); a bracket assembly (02) is set on the movable platform (4); the main scale of the grating ruler (3) is fixedly installed on the optical platform (01), and its secondary scale is installed on the movable platform (4) to measure the displacement.

7. The detection and adjustment method for a planetary motion mechanism according to claim 6, characterized in that, In step 2, the attitude of the worm (06) is adjusted by means of the adapter component (08).

8. The detection and adjustment method for a planetary motion mechanism according to claim 6, characterized in that, In step 2, the runout amount ΔT during the circular motion of the driven gear (05) is measured by establishing a runout measurement system.

9. The detection and adjustment method for a planetary motion mechanism according to claim 8, characterized in that, The movable platform (4) is a four-dimensional adjustment platform.

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