Chain wheel synchronization correction method

Abstract

The invention provides a correction method for chain wheel synchronization, and belongs to the technical field of mechanical transmission. The correction method comprises the steps that a datum plane is selected, and the datum plane is located at the center point of the tooth top face of a first gear tooth and outside the first gear tooth; the position of the second chain wheel is adjusted, so that the center point of the tooth top face of the second wheel tooth is aligned with the center point of the tooth top face of the first wheel tooth; detecting a first shortest distance from the reference surface to a third gear tooth; detecting a second shortest distance from the extension surface of the reference surface to a fourth gear tooth; and correcting the first chain wheel and the second chain wheel according to the first shortest distance and the second shortest distance. The deflection angles of the two chain wheels can meet the requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical transmission, and in particular relates to a method for correcting sprocket synchronization. Background Art

[0002] In the transmission device, two chain transmission assemblies with the same structure are installed on the drive shaft. Each chain transmission assembly includes a sprocket sleeved outside the drive shaft and a chain meshing with the sprocket. The two sprockets are arranged at intervals. In order to ensure the synchronization of the transmission device, the deflection angle between the two sprockets is required to be no more than 1', thereby ensuring the synchronization of the two chain transmission assemblies.

[0003] In the related art, in order to keep the two chain drive assemblies synchronized, it is necessary to calibrate and adjust the synchronization of the two sprockets. During the calibration, generally a line is drawn on two aligned teeth in the two sprockets, and then the positions of the drawn lines on the two teeth are measured to see if they are aligned.

[0004] However, during the actual assembly process, due to the limitations of the sprocket shape structure and size, the above method cannot accurately control the deflection angle of the two sprockets to meet the requirements. Summary of the invention

[0005] The embodiment of the present disclosure provides a method for calibrating sprocket synchronization, which can make the deflection angles of the two sprockets meet the requirements. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a correction method for sprocket synchronization, the correction method is applicable to a transmission device, the transmission device includes a drive shaft, a first sprocket and a second sprocket, two ends of the drive shaft are respectively located in the first sprocket and the second sprocket, and are respectively connected to the first sprocket and the second sprocket, the tooth top surface of the first sprocket and the tooth top surface of the second sprocket are both arc-shaped, the correction method includes: selecting a reference plane, the reference plane is located at the center point of the tooth top surface of the first gear tooth, and is circumscribed with the first gear tooth, the first gear tooth is any one of the gear teeth in the first sprocket; adjusting the position of the second sprocket so that the first gear tooth is The center point of the tooth top surface of the second gear tooth is aligned with the center point of the tooth top surface of the first gear tooth, and the second gear tooth is located in the second sprocket; the first shortest distance from the reference surface to the third gear tooth is detected, and the third gear tooth is the gear tooth in the first sprocket that is closest to the first gear tooth along the first direction, and the first direction is the rotation direction or the opposite direction of the drive shaft; the second shortest distance from the extension surface of the reference surface to the fourth gear tooth is detected, and the fourth gear tooth is the gear tooth in the second sprocket that is closest to the second gear tooth along the first direction; according to the first shortest distance and the second shortest distance, the first sprocket and the second sprocket are corrected.

[0007] In another implementation of the present disclosure, the selecting of the reference plane includes: adjusting the position of the first sprocket so that the center point of the tooth top surface of the first tooth is located at the highest point of the first sprocket; and selecting the tangent surface of the tooth top surface of the first tooth as the reference plane.

[0008] In another implementation of the present disclosure, the adjusting the position of the second sprocket so that the center point of the tooth top surface of the second tooth is aligned with the center point of the tooth top surface of the first tooth includes: detecting the minimum distance between the extension surface of the reference plane and the tooth top surface of the second tooth; adjusting the position of the second sprocket so that the minimum distance is less than a distance threshold.

[0009] In another implementation of the present disclosure, the detecting the minimum distance between the extension surface of the reference surface and the tooth top surface of the second gear tooth comprises: setting a detecting instrument at the center point of the tooth top surface of the first gear tooth, wherein the detecting head of the detecting instrument contacts the center point of the tooth top surface of the first gear tooth; moving the detecting instrument along the length direction of the driving shaft to the second sprocket; moving the detecting head of the detecting instrument so that the detecting head of the detecting instrument contacts the center point of the tooth top surface of the second gear tooth; and obtaining the minimum distance between the tooth top surface of the second gear tooth and the reference surface according to the moving distance of the detecting head.

[0010] In another implementation of the present disclosure, before detecting the minimum distance between the extension surface of the reference surface and the tooth top surface of the second gear tooth, the correction method also includes: rotating the second sprocket so that each gear tooth of the second sprocket corresponds one-to-one with each gear tooth in the first sprocket, and the two corresponding gear teeth are aligned relative to the orientation of the drive shaft.

[0011] In another implementation of the present disclosure, detecting the first shortest distance from the reference plane to the third gear tooth includes: moving the detection instrument along the length direction of the drive shaft to the first sprocket; adjusting the detection head of the detection instrument so that the detection head of the detection instrument contacts the center point of the tooth top surface of the first gear tooth; moving the detection head of the detection instrument so that the detection head contacts the highest point of the third gear tooth; and obtaining the first shortest distance based on the movement distance of the detection head in the vertical direction.

[0012] In another implementation of the present disclosure, detecting the second shortest distance from the extension surface of the reference surface to the fourth gear tooth includes: moving the detection instrument along the length direction of the drive shaft to the second sprocket; adjusting the detection head of the detection instrument so that the detection head contacts the center point of the tooth top surface of the second gear tooth; moving the detection head of the detection instrument so that the detection head contacts the highest point of the fourth gear; and obtaining the second shortest distance based on the movement distance of the detection head in the vertical direction.

[0013] In yet another implementation of the present disclosure, the detection instrument is a dial indicator.

[0014] In another implementation of the present disclosure, before selecting the reference plane in the first sprocket, the correction method also includes: placing the first sprocket and the second sprocket in the transmission device on a working platform respectively, the spindle of the machine tool where the working platform is located is connected to the dial indicator, and the spindle is parallel to the drive shaft.

[0015] In another implementation of the present disclosure, the first sprocket and the second sprocket are corrected according to the first shortest distance and the second shortest distance, including: obtaining a first angle between the third gear tooth and the first gear tooth according to the first shortest distance; obtaining a second angle between the fourth gear tooth and the second gear tooth according to the second shortest distance; and adjusting the second sprocket so that the difference between the first angle and the second angle is less than an angle threshold.

[0016] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0017] When the two sprockets in the transmission device are corrected by the correction method for sprocket synchronization provided by the embodiment of the present disclosure, since the correction method first selects a reference plane, and then aligns the center point of the tooth top surface of the second gear tooth with the center point of the tooth top surface of the first gear tooth, the tooth top surface of the first gear tooth and the tooth top surface of the second gear tooth can be at the same height. Then the correction method detects the first shortest distance from the reference plane to the third gear tooth, and the second shortest distance from the extension surface of the reference plane to the fourth gear tooth, so that when the first gear tooth and the second gear tooth are at the same height, correspondingly, under the premise that the first shortest distance and the second shortest distance are the same (or the difference is less than a certain value), it can be ensured that the first sprocket and the second sprocket are synchronized without relative offset.

[0018] It can be seen that the above correction method can use mathematical detection means to correct the first sprocket and the second sprocket, which can significantly improve the correction accuracy of the first sprocket and the second sprocket and avoid marking and indirect measurement methods that affect the correction accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of a transmission device in the related art;

[0021] Figure 2 yes Figure 1 a side view of the sprocket of the middle transmission;

[0022] Figure 3 yes Figure 2 The sprocket of the middle transmission device contains a schematic diagram of the structure of the circle where the tooth top surface of each gear tooth is located;

[0023] Figure 4 yes Figure 2 A schematic diagram of the circumference of each tooth top surface in the sprocket of the middle transmission device and the structure of the tooth top surface;

[0024] Figure 5 is a flow chart of a sprocket synchronization correction method provided by an embodiment of the present disclosure;

[0025] Figure 6 is a flow chart of another sprocket synchronization correction method provided by an embodiment of the present disclosure;

[0026] Figure 7 It is a structural schematic diagram of a transmission device provided by an embodiment of the present disclosure placed on a working platform;

[0027] Figure 8 is a schematic diagram of a structure in which the center point of the tooth top surface of the first gear tooth in the transmission device provided by an embodiment of the present disclosure is located at the highest point;

[0028] Fig. 9 is a schematic structural diagram of a transmission device provided by an embodiment of the present disclosure in which the center point of the tooth top surface of the second gear tooth is located at the highest point;

[0029] Fig.10 is a schematic diagram of detecting the first shortest distance provided by an embodiment of the present disclosure;

[0030] Fig.11 is a schematic diagram of detecting the second shortest distance provided by an embodiment of the present disclosure;

[0031] Fig.12 is a schematic diagram of the relationship between the first angle and the first shortest distance provided by an embodiment of the present disclosure;

[0032] Fig.13 It is a schematic diagram of the relationship between the second angle and the second shortest distance provided by an embodiment of the present disclosure.

[0033] The symbols in the figure mean the following:

[0034] 100, transmission device; 101, first sprocket assembly; 1011, first sprocket; 1012, first bearing;

[0035] 102. second sprocket assembly; 1021. second sprocket; 1022. second bearing;

[0036] 103, driving shaft; 1031, first shaft section; 1032, second shaft section; 1033, intermediate shaft section;

[0037] 1001, gear tooth; 1002, tooth top surface; 1003, tooth edge; 1004, tooth surface; 1005, tooth root surface;

[0038] 200, working platform; 201, dial indicator;

[0039] 11. first gear tooth; 110. first gear top surface; 111. first gear edge; 12. third gear tooth; 21. second gear tooth; 210. second gear top surface; 211. second gear edge; 22. fourth gear tooth. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0041] Figure 1 It is a schematic diagram of the structure of the transmission device in the related art, such as Figure 1 As shown, in the related art, the transmission device 100 includes a first sprocket assembly 101, a second sprocket assembly 102 and a drive shaft 103. The first sprocket assembly 101 and the second sprocket assembly 102 have the same structure. The first sprocket assembly 101 includes a first sprocket 1011 and two first bearings 1012, and the first sprocket 1011 is located between the two first bearings 1012. The second sprocket assembly 102 includes a second sprocket 1021 and two second bearings 1022, and the second sprocket 1021 is located between the two second bearings 1022.

[0042] The drive shaft 103 includes a first shaft section 1031, a second shaft section 1032 and an intermediate shaft section 1033. The first shaft section 1031 and the second shaft section 1032 are respectively located at the two ends of the intermediate shaft section 1033 and are respectively connected to the intermediate shaft section 1033 through a coupling. Two first bearings 1012 are respectively sleeved outside the two ends of the first shaft section 1031, and the first sprocket 1011 is fixedly sleeved outside the middle part of the first shaft section 1031 through a spline. Two second bearings 1022 are respectively sleeved outside the two ends of the second shaft section 1032, and the second sprocket 1021 is fixedly sleeved outside the middle part of the second shaft section 1032 through a spline.

[0043] Figure 2 yes Figure 1 Side view of the sprocket of the middle transmission, Figure 3 yes Figure 2 The sprocket of the transmission device contains a schematic diagram of the structure of the circle where the tooth top surface of each gear tooth is located, combined with Figure 2 and Figure 3 The first sprocket 1011 and the second sprocket 1021 each include 9 gear teeth 1001 on the outside, and the tooth top surface 1002 of each gear tooth 1001 is arc-shaped, and the tooth top surfaces of each gear tooth 1001 in the same sprocket are located in the same circumference. Each gear tooth 1001 has two tooth edges 1003, and the tooth edge 1003 is the intersection line of the tooth surface 1004 and the tooth top surface 1002. The tooth surface 1004 is the side surface of the gear tooth located between the tooth top surface 1002 and the tooth root surface 1005.

[0044] Figure 4 yes Figure 2 The schematic diagram of the structure of the circumference of each tooth top surface and the tooth top surface in the sprocket of the transmission device is shown in Figure 4 , because after the sprockets are locked with the corresponding shaft segments, when the first sprocket assembly 101 and the first shaft segment 1031 are connected as a whole, and the second sprocket assembly 102 and the second shaft segment 1032 are connected as a whole through the intermediate shaft segment 1033 to form the transmission device 100, it is impossible to ensure that the sprockets on the first shaft segment 1031 and the second shaft segment 1032 are completely overlapped and aligned, and it is also impossible to ensure that the axial section a of the first sprocket and the axial section b of the second sprocket are coplanar. Therefore, during the installation process, it is necessary to correct and adjust the synchronization of the teeth of the sprockets on the first shaft segment and the second shaft segment so that their corresponding axial sections are in the same section, thereby ensuring the synchronization of the operation of the first sprocket and the second sprocket.

[0045] The embodiment of the present disclosure provides a method for correcting sprocket synchronization, such as Figure 5 As shown, the correction method is applicable to the transmission device mentioned above. The correction method includes:

[0046] S501: Select a reference surface based on the first sprocket.

[0047] The reference plane is located at the center point of the tooth top surface of the first gear tooth and is circumscribed to the first gear tooth. The first gear tooth is any one of the gear teeth in the first sprocket.

[0048] The center point of the tooth top surface of the first gear tooth refers to the center point of the tooth top surface of the first gear tooth in the arc length direction.

[0049] S502: Adjust the position of the second sprocket so that the center point of the tooth top surface of the second gear tooth is aligned with the center point of the tooth top surface of the first gear tooth.

[0050] The second gear teeth are located in the second sprocket, and the orientation of the second gear teeth relative to the drive shaft is the same as the orientation of the first gear teeth relative to the drive shaft.

[0051] The center point of the tooth top surface of the second gear tooth is aligned with the center point of the tooth top surface of the first gear tooth, which means that the center point of the tooth top surface of the second gear tooth and the center point of the tooth top surface of the first gear tooth are located on the same straight line parallel to the axis of the first sprocket.

[0052] S503: Detect the first shortest distance from the reference surface to the third gear tooth.

[0053] The third gear tooth is a gear tooth in the first sprocket that is closest to the first gear tooth along a first direction, and the first direction is a rotation direction or a reverse direction of the driving shaft.

[0054] S504: Detect the second shortest distance from the extension surface of the reference surface to the fourth gear tooth.

[0055] The fourth gear tooth is a gear tooth in the second sprocket that is closest to the second gear tooth along the first direction.

[0056] The extended surface of the reference surface refers to an outer extension surface of the reference surface along the axial direction of the first sprocket, and the extended surface of the reference surface is located in the same plane as the reference surface.

[0057] S505: Calibrate the first sprocket and the second sprocket according to the first shortest distance and the second shortest distance.

[0058] When the two sprockets in the transmission device are corrected by the correction method for sprocket synchronization provided by the embodiment of the present disclosure, since the correction method first selects a reference plane, and then aligns the center point of the tooth top surface of the second gear tooth with the center point of the tooth top surface of the first gear tooth, the tooth top surface of the first gear tooth and the tooth top surface of the second gear tooth can be at the same height. Then the correction method detects the first shortest distance from the reference plane to the third gear tooth, and the second shortest distance from the extension surface of the reference plane to the fourth gear tooth. In this way, when the first gear tooth and the second gear tooth are at the same height, correspondingly, under the premise that the first shortest distance and the second shortest distance are the same (or the difference is less than a certain value), it can be ensured that the first sprocket and the second sprocket are synchronized without relative offset.

[0059] It can be seen that the above correction method can use mathematical detection means to correct the first sprocket and the second sprocket, which can significantly improve the correction accuracy of the first sprocket and the second sprocket, and avoid marking and indirect measurement methods that affect the correction accuracy.

[0060] Figure 6 is a flow chart of another method for correcting sprocket synchronization provided by an embodiment of the present disclosure. The embodiment of the present disclosure also provides another method for correcting sprocket synchronization, such as Figure 6 As shown, the correction method is still applicable to the transmission device mentioned above. The correction method includes:

[0061] S601: Place the first sprocket and the second sprocket in the transmission device on a working platform respectively.

[0062] The machine tool on which the working platform is located has a main shaft, which is parallel to the driving shaft.

[0063] In the disclosed embodiment, the first sprocket and the second sprocket need to adjust the deflection angle before they are assembled and connected together through the intermediate shaft section 1033. Therefore, placing the first sprocket and the second sprocket in the transmission device on the working platform respectively means placing the first sprocket assembly 101 and the second sprocket assembly 102 on the working platform independently.

[0064] Figure 7 is a schematic diagram of a structure in which a transmission device provided by an embodiment of the present disclosure is placed on a working platform, such as Figure 7 As shown, when the first sprocket assembly 101 and the second sprocket assembly 102 are respectively placed on the working platform 200, it means that the two first bearings 1012 in the first sprocket assembly 101 are placed on the working platform 200, so that each gear tooth of the first sprocket 1011 is spaced apart from the working platform 200. At the same time, the two second bearings 2012 in the second sprocket assembly 102 are placed on the working platform 200, which means that each gear tooth of the second sprocket 1021 is spaced apart from the working platform 200.

[0065] S602: Adjust the position of the first sprocket so that the center point of the tooth top surface of the first gear tooth is located at the highest point of the first sprocket.

[0066] Adjust the first sprocket assembly, select one of the teeth on the first sprocket 1011 in the first sprocket assembly 101 as the first tooth 11, and set the center point O1 of the first tooth top surface 110 of the first tooth 11 (see Figure 8 ) to the highest point.

[0067] The center point O1 of the first tooth top surface 110 of the first gear tooth 11 mentioned above refers to the center point of the first tooth top surface 110 in the arc length direction.

[0068] S603: Select the external tangent surface of the tooth top surface of the first gear tooth as the reference surface.

[0069] Figure 8 is a schematic diagram of a structure in which the center point of the tooth top surface of the first gear tooth in the transmission device provided by the embodiment of the present disclosure is located at the highest point, combined with Figure 8 After the center point O1 of the first tooth top surface 110 of the first gear tooth 11 is adjusted to the highest point, the first sprocket assembly is fixed on the working platform 200. When fixing, the two first bearings 1012 are fixed together with the working platform 200 by bolts or the like.

[0070] Then the external tangent plane of the tooth top surface of the first gear tooth is selected as the reference plane. In this way, the reference plane can be made horizontal, which is convenient for subsequent detection.

[0071] S604: Rotate the second sprocket assembly so that each gear tooth of the second sprocket corresponds to each gear tooth of the first sprocket one by one, and the two corresponding gear teeth are aligned relative to the direction of the drive shaft.

[0072] By preliminarily adjusting the position of the second sprocket assembly as described above, the orientation of each gear tooth of the second sprocket in the second sprocket assembly can be aligned with the orientation of each corresponding gear tooth in the first sprocket assembly.

[0073] The above-mentioned alignment of the two corresponding gear teeth refers to the fact that the corresponding gear teeth overlap along the length direction of the drive shaft based on naked eye observation.

[0074] After the position of the second sprocket is adjusted, the second sprocket assembly is fixed to the working platform 200. When fixing, the two second bearings 1022 are fixed together with the working platform 200 by bolts or the like.

[0075] S605: Detect the minimum distance between the extension surface of the reference surface and the tooth top surface of the second gear tooth.

[0076] Optionally, step S605 may be implemented in the following manner:

[0077] 6051: A detection instrument is arranged at the center point of the tooth top surface of the first gear tooth, and a detection head of the detection instrument contacts the center point of the tooth top surface of the first gear tooth.

[0078] In this way, the detection head of the detection instrument can be located at the highest point of the tooth top surface of the first gear tooth.

[0079] 6052: Move the testing instrument along the length of the drive shaft to the second sprocket.

[0080] This makes it easier to detect the minimum distance later.

[0081] 6053: Move the detection head of the detection instrument so that the detection head of the detection instrument contacts the center point of the tooth top surface of the second gear tooth.

[0082] In this way, the detection head of the detection instrument can be moved from the tooth top surface of the first gear tooth to the highest point of the tooth top surface of the second gear tooth.

[0083] 6054: According to the moving distance of the detection head, the minimum distance between the top surface of the second gear tooth and the extension surface of the reference surface is obtained.

[0084] Since the detection head of the detection instrument is initially located at the highest point of the tooth top surface of the first gear tooth and then located at the highest point of the tooth top surface of the second gear tooth, the minimum distance between the tooth top surface of the second gear tooth and the reference plane can be determined by the vertical movement distance of the detection head.

[0085] In the disclosed embodiment, the detection instrument is a dial indicator.

[0086] When detecting the minimum distance, a dial indicator may be first connected to the spindle of the machine tool where the working platform 200 is located.

[0087] The dial indicator can be adsorbed on the spindle by a magnet or the like.

[0088] Then, position the detection head of the dial indicator on the center point (that is, the highest point) of the first tooth of the first sprocket in the first sprocket assembly.

[0089] In order to ensure that the detection head of the dial indicator is in full contact with the highest point of the first tooth of the first sprocket, after the detection head of the dial indicator is positioned on the highest point of the first tooth of the first sprocket assembly, the dial indicator can be pressed down a certain amount and reset to zero.

[0090] Next, the height of the machine tool spindle is kept unchanged and the machine tool spindle is moved horizontally so that the dial indicator on the spindle can move the highest point (ie, the center point O2) of the second tooth 21 of the second sprocket 1021 in the second sprocket assembly 102.

[0091] Then, press down the dial gauge so that the detection head of the dial gauge contacts the highest point of the second gear tooth 21, and read the reading of the dial gauge.

[0092] The reading of the dial indicator is the minimum distance between the top surface of the second gear tooth and the reference surface.

[0093] S606: Adjust the position of the second sprocket so that the minimum distance is less than the distance threshold.

[0094] In the embodiment of the present disclosure, the distance threshold may be 0.02-0.04 mm, for example, 0.03 mm.

[0095] Fig. 9is a schematic diagram of a structure in which the center point of the tooth top surface of the second gear tooth in the transmission device provided by the embodiment of the present disclosure is located at the highest point, combined with Fig. 9 In this embodiment, the reading of the dial indicator should be less than 0.03mm (the distance threshold is 0.03mm) to meet the requirements and ensure that the top surface of the second gear tooth is aligned with the top surface of the first gear tooth. If the requirements are not met, the position height of the second sprocket assembly needs to be readjusted so that the height difference between the top surface of the second gear tooth and the top surface of the first gear tooth meets the requirements.

[0096] S607: Detect the first shortest distance from the reference surface to the third gear tooth.

[0097] The third gear tooth 12 is the gear tooth of the first sprocket 1011 that is closest to the first gear tooth 11 along the first direction, and the first direction is the rotation direction or the reverse direction of the first sprocket.

[0098] Optionally, step S607 may be implemented in the following manner:

[0099] 6071: Move the testing instrument along the length direction of the drive shaft to the first sprocket.

[0100] In this way, the detection head of the detection instrument can be relocated to the tooth top surface of the first gear tooth.

[0101] 6072: Adjust the detection head of the detection instrument so that the detection head of the detection instrument contacts the center point of the tooth top surface of the first gear tooth.

[0102] In this way, the detection head of the detection instrument can contact the highest point of the tooth top surface of the first gear tooth again, so that the highest point of the tooth top surface of the first gear tooth can be used as the detection reference point of the detection instrument.

[0103] 6073: Move the detection head of the detection instrument so that the detection head contacts the highest point of the third gear tooth.

[0104] In this way, the detection head of the detection instrument can also contact the highest point of the third gear tooth (that is, the first tooth edge) so as to locate the moving distance of the detection head.

[0105] 6074: According to the moving distance of the detection head in the vertical direction, the first shortest distance is obtained.

[0106] The moving distance of the detection head in the vertical direction is the first shortest distance.

[0107] Fig.10 is a schematic diagram of detecting the first shortest distance provided by the embodiment of the present disclosure, see Fig.10During the inspection, the machine tool spindle can be moved horizontally so that the detection head of the dial gauge 201 is located on the reference plane a, that is, at the highest point of the tooth top surface of the first gear tooth 11 in the first sprocket assembly. Then the dial gauge is reset to zero.

[0108] Next, move the spindle horizontally and then vertically until the detection head of the dial gauge is located at the highest point of the third gear tooth 12 (i.e., the first tooth edge 111). The first shortest distance h1 from the first tooth edge 111 to the highest point of the first gear tooth is measured and recorded.

[0109] S608: Detect the second shortest distance from the extension surface of the reference surface to the fourth gear tooth.

[0110] The fourth gear tooth 22 is a gear tooth in the second sprocket 1021 that is closest to the second gear tooth 21 along the first direction.

[0111] Optionally, step S608 may be implemented in the following manner:

[0112] 6081: Move the testing instrument along the length of the drive shaft to the second sprocket.

[0113] 6082: Adjust the detection head of the detection instrument so that the detection head contacts the center point of the top surface of the second gear tooth.

[0114] 6083: Move the detection head of the detection instrument so that the detection head contacts the highest point of the fourth gear;

[0115] 6084: According to the moving distance of the detection head in the vertical direction, the second shortest distance is obtained.

[0116] Fig.11 is a schematic diagram of detecting the second shortest distance provided by the embodiment of the present disclosure, see Fig.11 During the inspection, the machine tool spindle can be moved horizontally so that the detection head of the dial indicator is located on the extension surface of the reference surface a, that is, at the highest point of the second gear tooth 21 in the second sprocket assembly 102. Then the dial indicator is reset to zero.

[0117] Next, first move the spindle horizontally, then move the spindle vertically, and finally move the dial gauge head to the highest point of the fourth gear tooth 22 (that is, on the second tooth edge 211). Measure the distance from the second tooth edge 211 to the highest point of the second gear tooth 21 as the second shortest distance h2, and record it.

[0118] S609: Correcting the first sprocket and the second sprocket according to the first shortest distance and the second shortest distance.

[0119] Optionally, S609 is implemented in the following manner:

[0120] 6091: Obtain a first angle between the third gear tooth and the first gear tooth according to the first shortest distance.

[0121] The first angle is the angle between the first tooth edge and the axial section of the first gear tooth.

[0122] 6092: Obtain a second angle between the fourth gear tooth and the second gear tooth according to the second shortest distance.

[0123] The second included angle is the included angle between the second tooth edge and the axial section of the second gear tooth.

[0124] 6093: Adjust the second sprocket so that the difference between the first angle and the second angle is smaller than the angle threshold.

[0125] Fig.12 is a schematic diagram of the relationship between the first angle and the first shortest distance provided by the embodiment of the present disclosure, see Fig.12 By measuring the value of h1, the value of L1 (the distance from the highest point of the third gear tooth to the horizontal axial section of the first sprocket) can be obtained, so that the angle α between the first tooth edge 111 and the axial section of the tooth top surface of the first gear tooth can be calculated.

[0126] Fig.13 is a schematic diagram of the relationship between the second angle and the second shortest distance provided by the embodiment of the present disclosure, see Fig.13 Similarly, by measuring the value of h2, the value of L2 (the distance between the highest point of the fourth gear tooth and the horizontal axial section of the second sprocket) can be obtained, so that the angle β between the axial section of the second tooth edge 211 on the second sprocket and the tooth top surface of the second gear tooth 21 can be obtained. The difference between the angles α and β is the deflection angle of the two sprockets. Therefore, the deflection angle of the two sprockets can be adjusted according to the detection of h1 and h2.

[0127] According to the requirements of synchronization accuracy of the two sprockets, the drive shaft is rotated. Since the tooth top surfaces of all gears in the same sprocket are located on the same circumference (circumferential radius is R), the rotation of the sprocket has no effect on its highest point, but the difference between the highest point of another gear tooth adjacent to the gear tooth at the highest point and the highest point of the sprocket will change. Therefore, by rotating the sprocket, the difference between the heights of h1 and h2 can be adjusted so that the difference meets the synchronization accuracy requirements. In other words, when the difference between the angles α and β does not meet the deflection requirements of the two sprockets, the position of the second sprocket can be adjusted so that the difference between the angles α and β meets the requirements, that is, the difference between the angles α and β is less than the angle threshold.

[0128] In the embodiment of the present disclosure, the angle threshold may be 0.5-2′, for example, 1′.

[0129] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A correction method for sprocket synchronization, the correction method is applicable to a transmission device, the transmission device comprises a drive shaft, a first sprocket and a second sprocket, two ends of the drive shaft are respectively located in the first sprocket and the second sprocket, and are respectively connected to the first sprocket and the second sprocket, the tooth top surface of the first sprocket and the tooth top surface of the second sprocket are both arc-shaped, characterized in that: The correction method comprises: Selecting a reference plane, the reference plane is located at the center point of the tooth top surface of the first gear tooth and is circumscribed to the first gear tooth, the first gear tooth being any one of the gear teeth in the first sprocket; Adjust the position of the second sprocket so that the center point of the tooth top surface of the second gear tooth is aligned with the center point of the tooth top surface of the first gear tooth, and the second gear tooth is located in the second sprocket; Detecting a first shortest distance from the reference surface to a third gear tooth, wherein the third gear tooth is a gear tooth of the first sprocket that is closest to the first gear tooth along a first direction, wherein the first direction is a rotation direction of the drive shaft or a reverse direction; Detecting a second shortest distance from an extension surface of the reference surface to a fourth gear tooth, wherein the fourth gear tooth is a gear tooth of the second sprocket that is closest to the second gear tooth along the first direction; The first sprocket and the second sprocket are calibrated according to the first shortest distance and the second shortest distance.

2. The calibration method according to claim 1, characterized in that: The selecting of the reference surface comprises: Adjusting the position of the first sprocket so that the center point of the tooth top surface of the first gear tooth is located at the highest point of the first sprocket; The external tangent plane of the tooth top surface of the first gear tooth is selected as the reference plane.

3. The calibration method according to claim 2, characterized in that: The step of adjusting the position of the second sprocket so that the center point of the tooth top surface of the second gear tooth is aligned with the center point of the tooth top surface of the first gear tooth comprises: Detecting the minimum distance between the extension surface of the reference surface and the tooth top surface of the second gear tooth; The position of the second sprocket is adjusted so that the minimum distance is less than a distance threshold.

4. The calibration method according to claim 3, characterized in that: The detecting the minimum distance between the extension surface of the reference surface and the tooth top surface of the second gear tooth comprises: A detection instrument is arranged at the center point of the tooth top surface of the first gear tooth, wherein the detection head of the detection instrument contacts the center point of the tooth top surface of the first gear tooth; Moving the detection instrument along the length direction of the drive shaft to the second sprocket; Moving the detection head of the detection instrument so that the detection head of the detection instrument contacts the center point of the tooth top surface of the second gear tooth; According to the moving distance of the detection head, the minimum distance between the tooth top surface of the second gear tooth and the reference surface is obtained.

5. The calibration method according to claim 4, characterized in that: Before detecting the minimum distance between the extension surface of the reference surface and the tooth top surface of the second gear tooth, the correction method further includes: The second sprocket is rotated so that each gear tooth of the second sprocket corresponds to each gear tooth of the first sprocket one by one, and the two corresponding gear teeth are aligned relative to the driving shaft.

6. The calibration method according to claim 4, characterized in that: The detecting the first shortest distance from the reference surface to the third gear tooth comprises: Moving the detection instrument along the length direction of the drive shaft to the first sprocket; Adjusting the detection head of the detection instrument so that the detection head of the detection instrument contacts the center point of the tooth top surface of the first gear tooth; Moving the detection head of the detection instrument so that the detection head contacts the highest point of the third gear tooth; The first shortest distance is obtained according to the moving distance of the detection head in the vertical direction.

7. The calibration method according to claim 4, characterized in that: The detecting the second shortest distance from the extension surface of the reference surface to the fourth gear tooth comprises: Moving the detection instrument along the length direction of the drive shaft to the second sprocket; Adjusting the detection head of the detection instrument so that the detection head contacts the center point of the tooth top surface of the second gear tooth; Moving the detection head of the detection instrument so that the detection head contacts the highest point of the fourth gear; The second shortest distance is obtained according to the moving distance of the detection head in the vertical direction.

8. The calibration method according to any one of claims 4 to 7, characterized in that: The detection instrument is a dial indicator.

9. The calibration method according to claim 8, characterized in that: Before selecting the reference plane in the first sprocket, the correction method also includes: placing the first sprocket and the second sprocket in the transmission device on a working platform respectively, the main shaft of the machine tool where the working platform is located is connected to the dial indicator, and the main shaft is parallel to the drive shaft.

10. The calibration method according to any one of claims 1 to 7 and 9, characterized in that: The step of correcting the first sprocket and the second sprocket according to the first shortest distance and the second shortest distance includes: Obtaining a first angle between the third gear tooth and the first gear tooth according to the first shortest distance; Obtaining a second angle between the fourth gear tooth and the second gear tooth according to the second shortest distance; The second sprocket is adjusted so that a difference between the first angle and the second angle is smaller than an angle threshold.

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