Device for detecting the combined radial and axial deviation of the bore of a double planetary gear

Abstract

The utility model discloses a kind of double planetary gear inner hole and radial comprehensive deviation detection device, it includes inner hole measuring unit, standard pinion moving module, standard gear moving module and centre distance measuring unit, standard pinion moving module and standard gear moving module are arranged in the radial two sides of inner hole measuring unit. I am engaged by spring drive standard pinion and standard gear with the measured double planetary gear, can eliminate gear meshing side gap, ensure the accuracy of measurement. In meshing state, it is rotated by standard gear drive measured double planetary gear one round, four displacement sensors in centering axle measure the displacement data of its to double planetary gear inner hole face circumferential different parts, according to this, the diameter of gear inner hole, inner hole roundness, inner hole cylindricity can be calculated;Radial comprehensive deviation can be measured by first distance sensor and second distance sensor;The device detection efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of gear quality inspection technology, and in particular to a device for detecting the combined deviation of the inner bore and radial direction of a planetary gear. Background Technology

[0002] The inner diameter, roundness, and radial composite deviation of planetary gears are important parameters reflecting their manufacturing quality, and these parameters need to be measured before the gears leave the factory. Radial composite deviation is defined as the periodic fluctuation in the center distance caused by the change in the contact position of the tooth surfaces when the gear pair is tightly meshed and rotates one revolution. This fluctuation is the radial composite deviation. Radial composite deviation is a key indicator of the smoothness of gear pair operation and directly affects the vibration, noise, and service life of the transmission system. However, current technology lacks a device that can comprehensively measure these parameters, and using different equipment to measure these parameters separately presents technical problems such as time-consuming testing and low efficiency. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a device for detecting the comprehensive deviation of the inner bore and radial direction of a double planetary gear, so as to solve the technical problem of detecting the comprehensive deviation of the inner bore, roundness and radial direction of the planetary gear.

[0004] The utility model of the double planetary gear inner hole and radial comprehensive deviation detection device includes an inner hole measuring unit, a standard small tooth moving module and a standard large tooth moving module, which are arranged on both sides of the inner hole measuring unit radially.

[0005] The inner hole measuring unit includes a fixedly mounted shaft seat, on which a positioning component for placing the measured double planetary gear is fixedly mounted. The positioning component includes a frustum that mates with the end face of the gear and a centering shaft that mates with the inner hole of the gear. The centering shaft is perpendicularly connected to the frustum. The centering shaft and the frustum are provided with slots. A support bar is provided in the slots. A displacement sensor is provided on the support bar that is radially aligned with the inner hole surface of the gear.

[0006] The standard pinion moving module includes a horizontally fixed first guide seat, a first slide table linearly sliding with the first guide seat, a first tension spring assembly for pulling the first slide table toward the inner hole measuring unit, a first cylinder for dragging the first slide table away from the inner hole measuring unit, a first rotating shaft mounted on the first slide table via a bearing, a standard pinion fixed on the first rotating shaft for meshing with the large gear on the double planetary gear set, a first connecting plate fixed on the first slide table, a first motor fixed on the first connecting plate, a second rotating shaft connected to the rotor of the first motor, and a first transmission mechanism connecting the first rotating shaft and the second rotating shaft.

[0007] The standard large gear moving module includes a horizontally fixed second guide seat, a second slide table that slides linearly with the second guide seat, a second tension spring assembly for pulling the second slide table toward the inner hole measuring unit, a second cylinder for dragging the second slide table away from the inner hole measuring unit, a third rotating shaft mounted on the second slide table via bearings, a standard large gear fixed on the third rotating shaft for meshing with the small gear on the double planetary gear, a second connecting plate fixed on the second slide table, a second motor fixed on the second connecting plate, a fourth rotating shaft connected to the rotor of the second motor, and a second transmission mechanism connecting the third rotating shaft and the fourth rotating shaft.

[0008] The center distance measuring unit includes a first reference block fixedly mounted on a first slide, a first distance sensor fixedly arranged next to the inner hole measuring unit for measuring the distance to the first reference block, a second reference block fixedly mounted on a second slide, and a second distance sensor fixedly arranged next to the inner hole measuring unit for measuring the distance to the second reference block.

[0009] Furthermore, the first transmission mechanism and the second transmission mechanism have the same structure, both consisting of a synchronous pulley and a synchronous belt.

[0010] Furthermore, the first tension spring assembly consists of two springs arranged on both sides of the first slide, and the two ends of the springs in the first tension spring assembly are connected to the first slide and the first guide seat respectively through connectors.

[0011] Furthermore, the second tension spring assembly consists of two springs arranged on both sides of the second slide, and the two ends of the springs in the second tension spring assembly are connected to the second slide and the second guide seat respectively through connectors.

[0012] The beneficial effects of this utility model are:

[0013] This utility model relates to a device for detecting the comprehensive deviation of the inner bore and radial direction of a double planetary gear. It uses a spring-driven standard pinion and standard large gear to mesh with the double planetary gear under test, eliminating gear meshing backlash and ensuring measurement accuracy. In the meshing state, the standard gear drives the double planetary gear under test to rotate one revolution. Four displacement sensors located within the centering shaft measure the displacement data of the gear to different circumferential locations on the inner bore surface of the double planetary gear. Based on this, the diameter, roundness, and cylindricity of the gear's inner bore can be calculated. The radial comprehensive deviation can be measured using a first distance sensor and a second distance sensor. This device has high detection efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a device for detecting the combined deviation of the inner bore and radial direction of a double planetary gear.

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure after the standard pinion and standard gear on the testing device have been removed.

[0016] Figure 3 This is a three-dimensional schematic diagram of placing a double planetary gear on a testing device.

[0017] Figure 4 This is a three-dimensional structural diagram of the testing device after the standard gears and transmission mechanism have been removed. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-3 As shown, the dual planetary gear inner hole and radial comprehensive deviation detection device in this embodiment includes an inner hole measurement unit, a standard small tooth moving module, a standard large tooth moving module, and a center distance measurement unit. The standard small tooth moving module and the standard large tooth moving module are arranged on both radial sides of the inner hole measurement unit.

[0020] The internal bore measuring unit includes a fixedly mounted bearing 1. A positioning component for placing the measured double planetary gear is fixedly mounted on the bearing. The positioning component includes a frustum 2 that mates with the gear end face and a centering shaft 3 that mates with the gear's internal bore. The centering shaft is perpendicularly connected to the frustum. A slot 4 is provided on the centering shaft and the frustum. A support strip 5 is provided within the slot. A displacement sensor 6, radially facing the gear's internal bore surface, is mounted on the support strip. In this embodiment, four displacement sensors are used, two facing the internal bore of the pinion on the double planetary gear, and the remaining two facing the internal bore of the large gear on the double planetary gear.

[0021] The standard pinion moving module includes a horizontally fixed first guide seat 7, a first slide 8 linearly sliding with the first guide seat, a first tension spring assembly 9 for pulling the first slide towards the inner hole measuring unit, a first cylinder 10 for dragging the first slide away from the inner hole measuring unit, a first rotating shaft 11 mounted on the first slide via bearings, a standard pinion 13 fixed on the first rotating shaft for meshing with the large gear on the double planetary gear 12, a first connecting plate 14 fixed on the first slide, a first motor 15 fixed on the first connecting plate, a second rotating shaft 16 connected to the rotor of the first motor, and a first transmission mechanism connecting the first and second rotating shafts. In this embodiment, the first transmission mechanism consists of a first synchronous pulley 17 fixed on the first rotating shaft, a second synchronous pulley 18 fixed on the second rotating shaft, and a first synchronous belt 19 connecting the first synchronous pulley 17 and the second synchronous pulley 18; in specific implementation, the first synchronous pulley 17 and the second synchronous pulley 18 can be pressed and fixed on the corresponding rotating shafts by screws 20 and pressure plates 21. In this embodiment, the first tension spring group 9 consists of two springs arranged on both sides of the first slide 8. The two ends of the springs in the first tension spring group are connected to the first slide and the first guide seat respectively through connectors.

[0022] The standard large gear moving module includes a horizontally fixed second guide seat 22, a second slide table 23 linearly sliding with the second guide seat, a second tension spring assembly 24 for pulling the second slide table toward the inner hole measuring unit, a second cylinder 25 for dragging the second slide table away from the inner hole measuring unit, a third rotating shaft 26 mounted on the second slide table via bearings, a standard large gear 27 fixed on the third rotating shaft for meshing with the small gear on the double planetary gear set, a second connecting plate 28 fixed on the second slide table, a second motor 29 fixed on the second connecting plate, a fourth rotating shaft 30 connected to the rotor of the second motor, and a second transmission mechanism connecting the third and fourth rotating shafts. In this embodiment, the second transmission mechanism consists of a third synchronous pulley 31 fixed on the third rotating shaft, a fourth synchronous pulley 32 fixed on the fourth rotating shaft, and a second synchronous belt 33 connecting the third synchronous pulley 31 and the fourth synchronous pulley 32; in specific implementation, the third and fourth synchronous pulleys can be fixed to the corresponding rotating shafts by screws and pressure plates. In this embodiment, the second tension spring assembly 24 consists of two springs arranged on both sides of the second slide 23. The two ends of the springs in the second tension spring assembly are connected to the second slide and the second guide seat respectively through connectors.

[0023] The center distance measuring unit includes a first reference block 34 fixedly mounted on a first slide, a first distance sensor 35 fixedly arranged next to the inner hole measuring unit for measuring the distance to the first reference block, a second reference block 36 fixedly mounted on a second slide, and a second distance sensor 37 fixedly arranged next to the inner hole measuring unit for measuring the distance to the second reference block.

[0024] The detection principle of the double planetary gear inner bore and radial comprehensive deviation detection device in this embodiment is as follows:

[0025] Measurement reference calibration:

[0026] First, the large gear measurement reference is calibrated: A standard double planetary gear with known internal hole parameters is placed on the centering shaft 3. Then, the first slide 8 is driven by the first tension spring group 9 to move towards the internal hole measurement unit, so that the standard pinion 13 meshes with the large gear of the standard double planetary gear. Then, the first motor 15 drives the standard pinion 13 to rotate through the first transmission mechanism. The standard pinion 13 drives the standard double planetary gear to rotate one revolution. The measurement value of the internal hole of the large gear on the standard double planetary gear by the displacement sensor 6 is used as the reference value for measuring the internal diameter, roundness, and cylindricity of the large gear. The measurement value of the first distance sensor 35 is used as the reference value for measuring the radial comprehensive deviation of the large gear. After the large gear measurement reference is calibrated, the first cylinder 10 drags the first slide away from the internal hole measurement unit to reset.

[0027] Next, the small tooth measurement reference calibration is performed: the second slide 23 is driven by the second tension spring group 24 to move towards the inner hole measurement unit, so that the standard large gear 27 meshes with the small gear of the standard double planetary gear. Then, the second motor 29 drives the standard large gear 27 to rotate through the second transmission mechanism. The standard large gear 27 drives the standard double planetary gear to rotate one revolution. The measurement value of the inner hole of the small gear on the standard double planetary gear by the displacement sensor 6 is used as the reference value for measuring the inner diameter, roundness and cylindricity of the small tooth. The measurement value of the second distance sensor 37 is used as the reference value for measuring the radial comprehensive deviation of the small tooth.

[0028] After obtaining the reference values ​​for the inner diameter, roundness, cylindricity, and radial comprehensive deviation, the standard double planetary gear is removed, and other double planetary gears to be tested are placed on the centering shaft 3 for testing. By comparing the measured values ​​with the reference values, the inner diameter, roundness, cylindricity, and radial comprehensive deviation of the large and small teeth of the double planetary gears to be tested can be obtained.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for detecting the combined deviation of the inner bore and radial direction of a double planetary gear, characterized in that: It includes an inner hole measuring unit, a standard small tooth moving module, a standard large tooth moving module, and a center distance measuring unit. The standard small tooth moving module and the standard large tooth moving module are arranged on both radial sides of the inner hole measuring unit. The inner hole measuring unit includes a fixedly mounted shaft seat, on which a positioning component for placing the measured double planetary gear is fixedly mounted. The positioning component includes a frustum that mates with the end face of the gear and a centering shaft that mates with the inner hole of the gear. The centering shaft is perpendicularly connected to the frustum. The centering shaft and the frustum are provided with slots. A support bar is provided in the slots. A displacement sensor is provided on the support bar that is radially aligned with the inner hole surface of the gear. The standard pinion moving module includes a horizontally fixed first guide seat, a first slide table linearly sliding with the first guide seat, a first tension spring assembly for pulling the first slide table toward the inner hole measuring unit, a first cylinder for dragging the first slide table away from the inner hole measuring unit, a first rotating shaft mounted on the first slide table via a bearing, a standard pinion fixed on the first rotating shaft for meshing with the large gear on the double planetary gear set, a first connecting plate fixed on the first slide table, a first motor fixed on the first connecting plate, a second rotating shaft connected to the rotor of the first motor, and a first transmission mechanism connecting the first rotating shaft and the second rotating shaft. The standard large gear moving module includes a horizontally fixed second guide seat, a second slide table that slides linearly with the second guide seat, a second tension spring assembly for pulling the second slide table toward the inner hole measuring unit, a second cylinder for dragging the second slide table away from the inner hole measuring unit, a third rotating shaft mounted on the second slide table via bearings, a standard large gear fixed on the third rotating shaft for meshing with the small gear on the double planetary gear, a second connecting plate fixed on the second slide table, a second motor fixed on the second connecting plate, a fourth rotating shaft connected to the rotor of the second motor, and a second transmission mechanism connecting the third rotating shaft and the fourth rotating shaft. The center distance measuring unit includes a first reference block fixedly mounted on a first slide, a first distance sensor fixedly arranged next to the inner hole measuring unit for measuring the distance to the first reference block, a second reference block fixedly mounted on a second slide, and a second distance sensor fixedly arranged next to the inner hole measuring unit for measuring the distance to the second reference block.

2. The device for detecting the combined deviation of the inner bore and radial direction of a double planetary gear according to claim 1, characterized in that: The displacement sensors consist of four, two of which face the inner hole of the small gear on the double planetary gear, and the other two face the inner hole of the large gear on the double planetary gear.

3. The device for detecting the combined deviation of the inner bore and radial direction of a double planetary gear according to claim 1, characterized in that: The first and second transmission mechanisms have the same structure, both consisting of a synchronous pulley and a synchronous belt.

4. The device for detecting the combined deviation of the inner bore and radial direction of a double planetary gear according to claim 1, characterized in that: The first tension spring assembly consists of two springs arranged on both sides of the first slide. The two ends of the springs in the first tension spring assembly are connected to the first slide and the first guide seat respectively through connectors.

5. The device for detecting the combined deviation of the inner bore and radial direction of a double planetary gear according to claim 1, characterized in that: The second tension spring assembly consists of two springs arranged on both sides of the second slide. The two ends of the springs in the second tension spring assembly are connected to the second slide and the second guide seat respectively through connectors.

Images