Method for correcting the synchronization of a sprocket

Abstract

The present disclosure provides a correction method of sprocket synchronization, belonging to the technical field of mechanical transmission. The correction method comprises: selecting a reference surface, the reference surface is located at the center point of the addendum surface of the first sprocket tooth, and is outside the first sprocket tooth; adjusting the position of the second sprocket, so that the center point of the addendum surface of the second sprocket tooth is aligned with the center point of the addendum surface of the first sprocket tooth; detecting the first shortest distance from the reference surface to the third sprocket tooth; detecting the second shortest distance from the extension surface of the reference surface to the fourth sprocket tooth; correcting the first sprocket and the second sprocket according to the first shortest distance and the second shortest distance. The present disclosure can make the offset angle of the two sprockets meet the requirements.

Description

Technical Field

[0001] This disclosure belongs to the field of mechanical transmission technology, and specifically relates to a method for correcting sprocket synchronization. Background Technology

[0002] In the transmission device, two identical chain drive assemblies are mounted on the drive shaft. Each chain drive assembly includes a sprocket fitted outside the drive shaft and a chain meshing with the sprocket. The two sprockets are spaced apart. To ensure the synchronization of the transmission device, the angle between the two sprockets must not exceed 1', thereby guaranteeing the synchronization of the two chain drive assemblies.

[0003] In related technologies, in order to keep the two chain drive components synchronized, it is necessary to correct and adjust the synchronization of the two sprockets. During the correction, it is generally done by marking lines on two teeth that are aligned with each other on the two sprockets, and then measuring whether the positions of the marked lines on the two teeth are aligned.

[0004] However, in actual assembly, due to the limitations of the sprocket's 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] This disclosure provides a method for correcting sprocket synchronization, which ensures that the deflection angles of the two sprockets meet requirements. The technical solution is as follows:

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

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

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

[0009] In another implementation of this disclosure, detecting the minimum distance between the extended surface of the reference surface and the tip surface of the second gear tooth includes: setting a detection instrument at the center point of the tip surface of the first gear tooth, with the detection head of the detection instrument contacting the center point of the tip 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 tip surface of the second gear tooth; and obtaining the minimum distance between the tip surface of the second gear tooth and the reference surface based on the moving distance of the detection head.

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

[0011] In another implementation of this disclosure, detecting the first shortest distance from the reference surface 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 contacts the center point of the tooth tip 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 vertical movement distance of the detection head.

[0012] In another implementation of this 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 tip 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 vertical movement distance of the detection head.

[0013] In another implementation of this disclosure, the testing instrument is a dial gauge.

[0014] In another implementation of this disclosure, before selecting a reference surface in the first sprocket, the calibration method further includes: placing the first sprocket and the second sprocket in the transmission device on a work platform, wherein the spindle of the machine tool on which the work platform is located is connected to the dial indicator, and the spindle is parallel to the drive shaft.

[0015] In another implementation of this disclosure, the step of correcting the first sprocket and the second sprocket based on the first shortest distance and the second shortest distance includes: obtaining a first included angle between the third tooth and the first tooth based on the first shortest distance; obtaining a second included angle between the fourth tooth and the second tooth based on the second shortest distance; and adjusting the second sprocket so that the difference between the first included angle and the second included angle is less than an angle threshold.

[0016] The beneficial effects of the technical solutions provided in this disclosure are:

[0017] When the sprocket synchronization correction method provided in this embodiment is used to correct two sprockets in a transmission device, the correction method first selects a reference plane, and then aligns the center point of the tip surface of the second sprocket with the center point of the tip surface of the first sprocket. This ensures that the tip surfaces of the first and second sprockets are at the same height. The correction method then detects the first shortest distance from the reference plane to the third sprocket and the second shortest distance from the extension surface of the reference plane to the fourth sprocket. Thus, when the first and second sprockets are at the same height, and given that the first and second shortest distances are the same (or the difference is less than a certain value), the first and second sprockets can be synchronized without relative offset.

[0018] As can be seen, the above correction method can use mathematical detection techniques 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 the impact of scribing and indirect measurement methods on the correction accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the transmission device in related technologies;

[0021] Figure 2 yes Figure 1 Side view of the sprocket in the central transmission device;

[0022] Figure 3 yes Figure 2 A schematic diagram of the structure of the sprocket in the middle transmission device, including the circumference of the tooth tip surface of each tooth;

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

[0024] Figure 5 This is a flowchart of a sprocket synchronization correction method provided in an embodiment of this disclosure;

[0025] Figure 6 This is a flowchart of another sprocket synchronization correction method provided in this embodiment of the disclosure;

[0026] Figure 7 This is a schematic diagram of the transmission device provided in this embodiment placed on the working platform;

[0027] Figure 8 This is a schematic diagram of the structure in the transmission device provided in this embodiment, where the center point of the tooth tip surface of the first gear tooth is located at the highest point;

[0028] Figure 9 This is a schematic diagram of the structure in the transmission device provided by this embodiment, in which the center point of the tooth tip surface of the second gear tooth is located at the highest point;

[0029] Figure 10 This is a schematic diagram of the detection of the first shortest distance provided in an embodiment of this disclosure;

[0030] Figure 11 This is a schematic diagram of the detection of the second shortest distance provided in an embodiment of this disclosure;

[0031] Figure 12 This is a schematic diagram illustrating the relationship between the first included angle and the first shortest distance provided in an embodiment of this disclosure;

[0032] Figure 13 This is a schematic diagram illustrating the relationship between the second included angle and the second shortest distance provided in the embodiments of this disclosure.

[0033] The symbols in the diagram represent the following meanings:

[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. Drive shaft; 1031. First shaft segment; 1032. Second shaft segment; 1033. Intermediate shaft segment;

[0037] 1001. Tooth; 1002. Tooth tip; 1003. Tooth ridge; 1004. Tooth surface; 1005. Tooth root surface;

[0038] 200. Work platform; 201. Dial gauge;

[0039] 11. First gear tooth; 110. First tooth top surface; 111. First tooth edge; 12. Third gear tooth; 21. Second gear tooth; 210. Second tooth top surface; 211. Second tooth edge; 22. Fourth gear tooth. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0041] Figure 1 This is a structural schematic diagram of a transmission device in related technologies, such as... Figure 1 As shown, in the related technology, 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, with the first sprocket 1011 located between the two first bearings 1012. The second sprocket assembly 102 includes a second sprocket 1021 and two second bearings 1022, with the second sprocket 1021 located between the two second bearings 1022.

[0042] The drive shaft 103 includes a first shaft segment 1031, a second shaft segment 1032, and an intermediate shaft segment 1033. The first shaft segment 1031 and the second shaft segment 1032 are located at both ends of the intermediate shaft segment 1033 and are connected to the intermediate shaft segment 1033 via couplings. Two first bearings 1012 are respectively sleeved on both ends of the first shaft segment 1031, and a first sprocket 1011 is fixedly sleeved on the outer side of the middle portion of the first shaft segment 1031 via a spline. Two second bearings 1022 are respectively sleeved on both ends of the second shaft segment 1032, and a second sprocket 1021 is fixedly sleeved on the outer side of the middle portion of the second shaft segment 1032 via a spline.

[0043] Figure 2 yes Figure 1 Side view of the sprocket in the central transmission device. Figure 3 yes Figure 2 A schematic diagram of the sprocket structure of the intermediate transmission device, including the circumference of the tooth tip surfaces of each tooth, combined with... Figure 2 and Figure 3 The first sprocket 1011 and the second sprocket 1021 each have nine teeth 1001 on their outer surfaces. The tip surface 1002 of each tooth 1001 is arc-shaped, and the tip surfaces of all teeth 1001 located on the same sprocket are located in the same circle. Each tooth 1001 has two tooth edges 1003, which are the lines of intersection between the tooth surface 1004 and the tooth tip surface 1002. The tooth surface 1004 is the side surface of the tooth located between the tooth tip surface 1002 and the tooth root surface 1005.

[0044] Figure 4 yes Figure 2 A schematic diagram of the circumference of each tooth tip surface and the structure of the tooth tip surface in the sprocket of the intermediate transmission device, see [link / reference]. Figure 4 Because after the sprockets are locked to their corresponding shaft segments, when the entire assembly formed by the first sprocket assembly 101 and the first shaft segment 1031, and the entire assembly formed by the second sprocket assembly 102 and the second shaft segment 1032, are connected to the transmission device 100 via the intermediate shaft segment 1033, it is impossible to guarantee that the sprockets on the first shaft segment 1031 and the second shaft segment 1032 will completely overlap and align. Therefore, it is also impossible to guarantee that the axial section a of the first sprocket and the axial section b of the second sprocket are coplanar. Therefore, during installation, it is necessary to correct and adjust the synchronization of the sprocket teeth on the first and second shaft segments so that their corresponding axial sections are at the same cross-section, thereby ensuring the synchronization of the operation of the first and second sprockets.

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

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

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

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

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

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

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

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

[0053] The third gear tooth is the gear tooth in the first sprocket that is closest to the first gear tooth along the first direction, where the first direction is the rotation direction of the drive shaft or the opposite direction.

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

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

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

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

[0058] When the sprocket synchronization correction method provided in this embodiment is used to correct two sprockets in a transmission device, the correction method first selects a reference plane, and then aligns the center point of the tooth tip surface of the second sprocket with the center point of the tooth tip surface of the first sprocket. This ensures that the tooth tip surfaces of the first and second sprockets are at the same height. The correction method then detects the first shortest distance from the reference plane to the third sprocket and the second shortest distance from the extension surface of the reference plane to the fourth sprocket. Thus, when the first and second sprockets are at the same height, and given that the first and second shortest distances are the same (or the difference is less than a certain value), the first and second sprockets can be synchronized without relative offset.

[0059] As can be seen, the above calibration method can use mathematical testing techniques to calibrate the first and second sprockets, which can significantly improve the calibration accuracy of the first and second sprockets and avoid the impact of scribing and indirect measurement methods on calibration accuracy.

[0060] Figure 6 This is a flowchart of another sprocket synchronization correction method provided in this disclosure embodiment. This disclosure also provides another sprocket synchronization correction method, such as... Figure 6 As shown, the correction method is still applicable to the transmission device mentioned earlier. The correction method includes:

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

[0062] The machine tool on which the work platform is located has a spindle, which is parallel to the drive axis.

[0063] In this embodiment, since the first sprocket and the second sprocket need to be re-adjusted in terms of deflection angle before they are assembled and connected together via the intermediate shaft section 1033, placing the first sprocket and the second sprocket in the transmission device on the working platform means placing the first sprocket assembly 101 and the second sprocket assembly 102 on the working platform independently.

[0064] Figure 7 This is a schematic diagram of the transmission device provided in this embodiment placed on the working platform, as shown below. Figure 7 As shown, when the first sprocket assembly 101 and the second sprocket assembly 102 are 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, such that each tooth of the first sprocket 1011 is spaced apart from the working platform 200. At the same time, when the two second bearings 2012 in the second sprocket assembly 102 are placed on the working platform 200, it means that each 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 top surface of the first tooth is located at the highest point of the first sprocket.

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

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

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

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

[0070] Then, the outer tangent surface of the tip of the first gear is selected as the reference surface. This ensures that the reference surface is horizontal, which facilitates subsequent inspection.

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

[0072] By initially adjusting the position of the second sprocket assembly, the orientation of each tooth of the second sprocket in the second sprocket assembly can be aligned with the orientation of each corresponding tooth in the first sprocket assembly.

[0073] The alignment of two corresponding gear teeth mentioned above refers to the alignment of corresponding gear teeth along the length of the drive shaft, as observed by the naked eye.

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

[0075] S605: Minimum distance between the extended surface of the detection reference plane and the tip surface of the second gear tooth.

[0076] Optionally, step S605 can be implemented in the following way:

[0077] 6051: A detection instrument is set at the center point of the tooth tip surface of the first gear, and the detection head of the detection instrument is in contact with the center point of the tooth tip surface of the first gear.

[0078] This allows the testing head of the testing instrument to be positioned at the highest point of the tooth tip of the first gear.

[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: The detection head of the moving detection instrument is brought into contact with the center point of the tooth tip surface of the second gear.

[0082] This allows the detection head of the testing instrument to move from the tip of the first gear to the highest point of the tip of the second gear.

[0083] 6054: Based on the moving distance of the detection head, obtain the minimum distance between the tooth tip surface of the second gear and the extended surface of the reference surface.

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

[0085] In this embodiment of the disclosure, the detection instrument is a dial gauge.

[0086] When testing the minimum distance, the dial indicator can be connected to the spindle of the machine tool where the work platform 200 is located.

[0087] The dial indicator can be attached to the spindle using a magnet or similar means.

[0088] Then, position the dial indicator's probe at the center point (the highest point) of the first tooth of the first sprocket in the first sprocket assembly.

[0089] To ensure that the dial indicator's probe makes full contact with the highest point of the first tooth of the first sprocket, after positioning the dial indicator's probe at the highest point of the first tooth of the first sprocket assembly, press down the dial indicator a certain amount and then set the dial indicator to zero.

[0090] Next, keeping the height of the machine tool spindle constant, move the machine tool spindle horizontally so that the dial indicator on the spindle can move to the highest point (i.e., the center point O2) of the second tooth 21 of the second sprocket 1021 in the second sprocket assembly 102.

[0091] Then, press down on the dial indicator so that the probe of the dial indicator contacts the highest point of the second gear 21, and read the dial indicator reading.

[0092] The dial indicator reading is the minimum distance between the tip 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 this embodiment of the disclosure, the distance threshold can be 0.02 to 0.04 mm, for example, 0.03 mm.

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

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

[0097] The third tooth 12 is the tooth in the first sprocket 1011 that is closest to the first tooth 11 along the first direction, where the first direction is the rotation direction of the first sprocket or the opposite direction.

[0098] Optionally, step S607 can be implemented in the following way:

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

[0100] This allows the detection head of the testing instrument to reposition itself at the tip of the first gear tooth.

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

[0102] This allows the detection head of the testing instrument to re-engage with the highest point of the tooth tip surface of the first gear, using the highest point of the tooth tip surface of the first gear as the detection reference point for the testing instrument.

[0103] 6073: The detection head of the moving detection instrument makes contact with the highest point of the third gear tooth.

[0104] This allows the detection head of the testing instrument to also contact the highest point of the third gear tooth (that is, the first tooth edge), so as to determine the moving distance of the detection head.

[0105] 6074: The first shortest distance is obtained based on the vertical movement distance of the detection head.

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

[0107] Figure 10 This is a schematic diagram of the detection of the first shortest distance provided in an embodiment of this disclosure. See also... Figure 10During testing, the machine tool spindle can be moved horizontally so that the testing head of the dial indicator 201 is located on the reference plane a, which is also located at the highest point of the tooth tip surface of the first gear tooth 11 in the first sprocket assembly. Then the dial indicator is zeroed.

[0108] Next, the main shaft is moved horizontally, and then vertically, until the dial indicator's probe is positioned at the highest point of the third gear tooth 12 (i.e., the first tooth ridge 111). The first shortest distance h1 is measured from the first tooth ridge 111 to the highest point of the first gear tooth and recorded.

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

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

[0111] Optionally, step S608 can be implemented in the following way:

[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 testing instrument so that the detection head contacts the center point of the tooth tip surface of the second gear.

[0114] 6083: The detection head of the moving detection instrument is brought into contact with the highest point of the fourth gear;

[0115] 6084: The second shortest distance is obtained based on the vertical movement distance of the detection head.

[0116] Figure 11 This is a schematic diagram of the detection of the second shortest distance provided in an embodiment of this disclosure. See also... Figure 11 During testing, the machine tool spindle can be moved horizontally so that the dial indicator's testing head is positioned on the extension surface of reference plane a, which is also located at the highest point of the second gear tooth 21 in the second sprocket assembly 102. Then, the dial indicator is zeroed.

[0117] Next, move the main shaft horizontally, then vertically, until the dial indicator's probe reaches the highest point of the fourth gear tooth 22 (i.e., the second tooth ridge 211). Measure the distance from the second tooth ridge 211 to the highest point of the second gear tooth 21, which is the second shortest distance h2, and record it.

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

[0119] Alternatively, S609 is implemented in the following way:

[0120] 6091: The first included angle between the third gear tooth and the first gear tooth is obtained based on the first shortest distance.

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

[0122] 6092: The second included angle between the fourth gear tooth and the second gear tooth is obtained based on the second shortest distance.

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

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

[0125] Figure 12 This is a schematic diagram illustrating the relationship between the first included angle and the first shortest distance provided in an embodiment of this disclosure. See also... Figure 12 By measuring the value of h1, the value of L1 (the distance between the highest point of the third gear tooth and the horizontal axial section of the first sprocket) can be obtained, and thus the angle α between the first tooth edge 111 and the axial section of the tooth tip surface of the first gear tooth can be obtained.

[0126] Figure 13 This is a schematic diagram illustrating the relationship between the second included angle and the second shortest distance provided in an embodiment of this disclosure. See also... Figure 13 Similarly, by measuring the value of h2, the value of L2 (the distance between the highest point of the fourth tooth and the horizontal cross-section of the second sprocket) can be obtained. From this, the angle β between the cross-section of the second tooth ridge 211 and the tooth tip surface of the second tooth 21 on the second sprocket can be calculated. The difference between angle α and β is the deflection angle of the two sprockets. Therefore, the deflection angle of the two sprockets can be adjusted based on the measurements of h1 and h2.

[0127] Based on the synchronization accuracy requirements of the two sprockets, rotating the drive shaft does not affect the highest point of the sprocket since the tooth tips of all gears in the same sprocket lie on the same circumference (circumference radius R). However, the difference between the highest point of the tooth adjacent to the tooth at the highest point and the highest point of the sprocket will change. Therefore, by rotating the sprocket, the difference between the two heights h1 and h2 can be adjusted to meet the synchronization accuracy requirements. In other words, when the difference between the included angles α and β does not meet the angle requirement of the two sprockets, the position of the second sprocket can be adjusted so that the difference between the included angles α and β meets the requirement, i.e., the difference between the included angles α and β is less than the angle threshold.

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

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

Claims

1. A method for calibrating sprocket synchronization, the method being applicable to a transmission device, the transmission device comprising a drive shaft, a first sprocket, and a second sprocket, the two ends of the drive shaft being located within the first sprocket and the second sprocket respectively, and connected to the first sprocket and the second sprocket respectively, wherein the tooth tip surfaces of the first sprocket and the second sprocket are both arc-shaped, characterized in that... The correction method includes: A reference plane is selected, which is located at the center point of the tooth tip surface of the first gear tooth and is externally tangent to the first gear tooth. The first gear tooth is 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 tip surface of the second gear is aligned with the center point of the tooth tip surface of the first gear, and the second gear is located in the second sprocket; The first shortest distance from the reference plane to the third gear tooth is detected. The third gear tooth is the gear tooth in the first sprocket that is closest to the first gear tooth along a first direction. The first direction is the rotation direction of the drive shaft or the opposite direction. The second shortest distance from the extension surface of the reference surface to the fourth gear tooth is detected, wherein the fourth gear tooth is the gear tooth of the second sprocket that is closest to the second gear tooth along the first direction; The first included angle between the third gear tooth and the first gear tooth is obtained based on the first shortest distance; The second included angle between the fourth gear tooth and the second gear tooth is obtained based on the second shortest distance; Adjust the second sprocket so that the difference between the first included angle and the second included angle is less than the angle threshold.

2. The correction method according to claim 1, characterized in that, The selection of the reference plane includes: Adjust the position of the first sprocket so that the center point of the tooth tip surface of the first sprocket is located at the highest point of the first sprocket; The outer tangent surface of the tip surface of the first gear tooth is selected as the reference surface.

3. The correction method according to claim 2, characterized in that, Adjusting the position of the second sprocket so that the center point of the tooth tip surface of the second sprocket is aligned with the center point of the tooth tip surface of the first sprocket includes: The minimum distance between the extended surface of the reference surface and the tip surface of the second gear tooth is detected; Adjust the position of the second sprocket so that the minimum distance is less than the distance threshold.

4. The correction method according to claim 3, characterized in that, The detection of the minimum distance between the extended surface of the reference surface and the tip surface of the second gear tooth includes: A detection instrument is set at the center point of the tooth tip surface of the first gear tooth, and the detection head of the detection instrument is in contact with the center point of the tooth tip surface of the first gear tooth. Move the detection instrument along the length of the drive shaft to the second sprocket; Move the detection head of the detection instrument so that the detection head of the detection instrument contacts the center point of the tooth tip surface of the second gear tooth; The minimum distance between the tooth tip surface of the second gear and the reference surface is obtained based on the movement distance of the detection head.

5. The correction method according to claim 4, characterized in that, Before detecting the minimum distance between the extended surface of the reference surface and the tip surface of the second gear tooth, the correction method further includes: Rotate the second sprocket so that each tooth of the second sprocket corresponds one-to-one with each tooth of the first sprocket, and the two corresponding teeth are aligned with the drive shaft.

6. The correction method according to claim 4, characterized in that, The detection of the first shortest distance from the reference plane to the third gear tooth includes: Move the testing instrument along the length of the drive shaft to the first sprocket; Adjust the detection head of the detection instrument so that the detection head of the detection instrument contacts the center point of the tooth tip surface of the first gear tooth; Move 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 based on the vertical movement distance of the detection head.

7. The correction method according to claim 4, characterized in that, The detection of the second shortest distance from the extension surface of the reference plane to the fourth gear tooth includes: Move the testing instrument along the length of the drive shaft to the second sprocket; Adjust the detection head of the detection instrument so that the detection head contacts the center point of the tooth tip surface of the second gear tooth; Move 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 based on the vertical movement distance of the detection head.

8. The correction method according to any one of claims 4-7, characterized in that, The testing instrument is a dial gauge.

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

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