A method for determining a qualified product of a synchronizer, an electronic device, and a storage medium

Abstract

The application designs a synchronizer qualified product determination method, electronic equipment and storage medium. The determination method comprises the following steps: positioning the graduation circle of the combination tooth, the circumference of the graduation circle intersects with the first side to form an intersection point, and the plane where a plurality of intersection points are located is used as a reference section; on the reference section, the intersection point is used as a starting point, a reference line is drawn along the first side, and the end point of the reference line is used as a reference point; a reference circle is drawn on the reference section, so that as many reference points as possible fall into the circumference of the reference circle; based on the number of the reference points falling into the circumference and the parameters of the reference circle, it is determined whether the synchronizer is a qualified product. The determination method provided by the application is simple and easy to operate, greatly reduces the workload of obtaining and calculating detection data, shortens the detection time, can quickly determine whether the synchronizer is a qualified product, and reduces the detection cost.

Description

Technical Field

[0001] This application relates to the field of circumferential manufacturing technology of synchronizers, and more particularly to a method for determining the quality of synchronizers, electronic equipment, and storage medium. Background Technology

[0002] Synchronizers are key components in gearboxes, and gear sleeves are key components within synchronizers. The manufacturing precision of the engagement teeth within the gear sleeve determines the final precision of the sleeve, significantly impacting the operating efficiency of the electric motor within the gearbox. Existing techniques for detecting engagement tooth precision obtain the precision of a single engagement tooth by inspecting its three-dimensional contour. This method requires acquiring a large amount of data, leading to numerous sampling errors, and is computationally intensive, time-consuming, and costly. Furthermore, because this method can only obtain the precision of a single engagement tooth, it cannot provide a comprehensive evaluation of the precision of all engagement teeth within the gear sleeve. Since gearbox performance is the result of the combined influence of the precision of all engagement teeth within the gear sleeve, existing detection techniques cannot objectively and comprehensively reflect the precision of the engagement teeth. Summary of the Invention

[0003] To address the limitations of existing technologies that can only evaluate the precision of individual mating teeth within a gear sleeve, and to improve the objectivity and reliability of mating tooth precision evaluation while reducing the workload and cost associated with testing mating tooth precision,

[0004] In a first aspect, this application provides a method for determining the quality of a synchronizer, wherein the synchronizer is provided with a plurality of engagement teeth in its circumferential direction, each engagement tooth including a first side and a second side, and the determination method includes:

[0005] The pitch circle of the mating tooth is positioned, and the circumference of the pitch circle intersects with the first side to form an intersection point, with the plane containing the plurality of intersection points serving as a reference section.

[0006] On the reference cross section, a reference line is drawn along the first side, starting from the intersection point, and the end point of the reference line is taken as the reference point; wherein, the length of the reference line is the theoretical pitch of the synchronizer;

[0007] Draw a reference circle on the reference section, so that as many reference points as possible fall within the circumference of the reference circle;

[0008] Based on the number of reference points falling into the circumference and the parameters of the reference circle, it is determined whether the synchronizer is a qualified product.

[0009] Furthermore, the step of drawing a reference circle on the reference cross-section, such that as many reference points as possible fall within the circumference of the reference circle, includes:

[0010] When the number of the engagement teeth is even, on the reference section, the reference points which are mirror-symmetric about the center of the synchronizer are connected by connecting lines two by two, and the intersection points formed by the intersection of the connecting lines are taken as the reference center of the reference circle;

[0011] The distance from the reference center to any reference point is taken as the reference radius.

[0012] Further, when the intersection points formed by the intersection of the connecting lines are greater than 1, the maximum distance between the intersection points is obtained, and when the maximum distance is greater than a preset distance threshold, the synchronizer is determined as unqualified.

[0013] Further, when the maximum distance is less than or equal to the preset distance threshold, the intersection point with the smallest distance from the center of the synchronizer is determined as the reference center.

[0014] Further, the reference circle is made on the reference section, so that as many reference points as possible fall into the circumference of the reference circle, which includes:

[0015] On the reference section, the center of the synchronizer is taken as the initial center, and the distance from the reference point to the initial center is taken as the initial radius to make the reference circle;

[0016] The position of the initial center and the length of the initial radius are adjusted until as many reference points as possible fall into the circumference of the reference circle.

[0017] Further, the method further includes determining whether the synchronizer is qualified based on the number of the reference points falling into the circumference and the parameters of the reference circle.

[0018] Further, the determination of whether the synchronizer is qualified based on the number of the reference points falling into the circumference and the parameters of the reference circle includes:

[0019] determining whether all the reference points fall into the circumference;

[0020] When the determination result is yes, determining whether the offset of the reference center from the center of the synchronizer exceeds a preset center offset threshold;

[0021] When the determination result is yes, calculating the difference between the radius of the synchronizer and the reference radius, and determining whether the difference exceeds a preset radius difference threshold.

[0022] Further, after the determination of whether all the reference points fall into the circumference, when the determination result is no, the reference points that fail to fall into the circumference are repositioned to exclude positioning errors.

[0023] In a second aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method steps of any one of the first aspect when executing the program.

[0024] In a third aspect, the present application provides a computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the method steps of any one of the first aspect.

[0025] Advantageous effects:

[0026] The present application positions the reference circle of the coupling teeth, and the intersection of the circumference of the reference circle and the first side edge forms an intersection point. A plurality of planes on which the intersection points are located are used as reference cross sections. On the reference cross section, a reference line is drawn from the intersection point along the first side edge, and a reference point is taken as the end point of the reference line. The length of the reference line is the theoretical pitch of the synchronizer. A reference circle is drawn on the reference cross section so that as many reference points as possible fall on the circumference of the reference circle. Based on the number of reference points falling on the circumference and the parameters of the reference circle, it is determined whether the synchronizer is a qualified product. Compared with the prior art, the present application reduces the amount of data to be obtained and avoids detection errors caused by obtaining detection data. The method provided by the present application is simple and easy to implement, especially for synchronizers with a large number of coupling teeth. The method provided by the present application greatly reduces the workload of obtaining and calculating detection data, shortens the detection time, quickly determines whether the synchronizer is a qualified product, reduces the detection cost, and obtains objective and reliable evaluation results. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 is a method flowchart provided by the first embodiment of the present application;

[0029] Figure 2 is a reference cross section structure diagram in the first embodiment of the present application;

[0030] Figure 3 is a reference cross section structure diagram in the second embodiment of the present application;

[0031] Figure 4 is a schematic diagram of an electronic structure device in Embodiment 3 of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0033] Embodiment 1

[0034] The existing method for detecting the precision of the engagement teeth has the problems of large amount of data to be acquired and calculated, errors possibly caused in the acquisition process, large amount of calculation, and high cost. The performance of the transmission is the result of the comprehensive influence of all the engagement teeth in the synchronizer, and even if only one engagement tooth in the synchronizer is lower than the precision standard, the performance of the transmission will be reduced.

[0035] Embodiment 1 provides a method for determining a qualified synchronizer, the synchronizer is provided with 42 engagement teeth in the circumferential direction, and the engagement teeth are spline teeth.

[0036] As shown in the accompanying Figure 1 The determining method comprises the following steps:

[0037] S1, positioning a reference circle of the engagement teeth, the circumference of the reference circle intersects the first side edge to form an intersection point, and a plane on which a plurality of the intersection points are located is taken as a reference section;

[0038] S2, on the reference section, a reference line is drawn from the intersection point along the first side edge, and a reference point is taken as the end point of the reference line; wherein the length of the reference line is the theoretical pitch of the synchronizer;

[0039] S3, a reference circle is drawn on the reference section, and as many reference points as possible fall on the circumference of the reference circle;

[0040] S4, based on the number of the reference points falling on the circumference and the parameters of the reference circle, it is determined whether the synchronizer is a qualified product.

[0041] The method will be described in detail below in combination with the accompanying drawings and the specific embodiments:

[0042] Step S1 is performed to position a reference circle of the engagement teeth, the circumference of the reference circle intersects the first side edge to form an intersection point, and a plane on which a plurality of the intersection points are located is taken as a reference section;

[0043] The pitch circle of the synchronizer's engagement teeth is a dimensional reference chosen to facilitate the design and manufacturing of the synchronizer's engagement teeth. The pitch circle serves as the basis for calculating the dimensions of each part of the engagement teeth. Therefore, to facilitate the positioning of reference points, the pitch circle of the engagement teeth is first located. The circumference of the pitch circle intersects with the first side edge to form an intersection point. Using the plane containing multiple intersection points as a reference section is most advantageous for comparing the actual measured values ​​of the synchronizer's engagement teeth parameters with the theoretical values.

[0044] Execute step S2, on the reference section, starting from the intersection point, draw a reference line along the first side, and take the end point of the reference line as the reference point; wherein, the length of the reference line is the theoretical pitch m of the synchronizer; the theoretical pitch m is the axial distance between two corresponding points on the mean diameter line of two adjacent mating teeth.

[0045] As attached Figure 2 The diagram shows a reference cross-section of the synchronizer. The pitch circle intersects with the first side edge to form an intersection point A1. Extending A1B1 along the first side edge A1B1 to point E1, the line segment length A1E1 equals the theoretical pitch m, thus determining the reference point E1.

[0046] Reference points E2, E3, ..., E42 are determined sequentially on the reference section using the method described above.

[0047] When the synchronizer being tested has a sufficiently high accuracy, each reference point found in step S2 will form a reference circle. That is, reference points E1, E2, ..., E42 should fall completely within the circumference of the same reference circle, and the center of the reference circle O1 should coincide with the center of the synchronizer O2, and the difference m1 between the synchronizer radius r and the reference radius r1 should be equal to the theoretical pitch m.

[0048] The overall accuracy of the synchronizer's engagement teeth can be obtained by calculating the offset d between the reference center O1 and the synchronizer's center O2, as well as the difference between m1 and m.

[0049] Therefore, step S3 is performed to draw a reference circle on the reference section, so that as many reference points as possible fall into the circumference of the reference circle;

[0050] On the reference section, a reference circle is drawn with the center of the synchronizer as the initial center and the distance from the reference point to the center of the synchronizer as the initial radius;

[0051] Adjust the position of the initial center and the length of the initial radius until as many reference points as possible fall within the circumference of the circle.

[0052] Execute step S3 to determine whether the synchronizer is a qualified product based on the number of reference points falling into the circumference and the parameters of the reference circle;

[0053] S3.1, Determine whether all the reference points fall within the circumference;

[0054] If the judgment result is negative, the reference point that cannot fall into the circumference is repositioned to eliminate the influence of error;

[0055] If the judgment result is still negative, it indicates that there is a precision problem with the engagement gear corresponding to the reference point, which does not meet the precision requirements and affects the performance of the transmission. The test is stopped and the test result is reported back.

[0056] S3.2, when the judgment result is yes, determine whether the offset between the reference center and the center of the synchronizer exceeds a preset center offset threshold.

[0057] When all reference points E1, E2, ..., E42 fall within the circumference, a coordinate system is established with the center O2 of the synchronizer as the origin. The coordinates of the reference center O1 in the coordinate system are obtained by a profilometer. When the manufacturing and detection accuracy of the synchronizer reaches zero error, the obtained coordinates of the reference center O1 (x, y) should be (0, 0).

[0058] Considering error factors, the allowable center offset is set to d, when d > √x 2 +y 2 This indicates that all the engagement teeth in the synchronizer being tested have shifted, indicating that the engagement teeth corresponding to the reference point have an accuracy problem and do not meet the accuracy requirements, which affects the performance of the transmission. The test is then stopped, and the test results are fed back.

[0059] When d≤√x 2 +y 2 This indicates that the overall offset of all mating teeth is within the allowable error range.

[0060] S3.3, when the judgment result is yes, calculate the difference between the synchronizer radius and the reference radius, and determine whether the difference exceeds a preset radius difference threshold.

[0061] In the data processor, the upper and lower limits of the radius difference threshold are pre-set to [-m, m].

[0062] Calculate the difference m1 between the synchronizer radius r and the reference radius r1.

[0063] The system determines whether the absolute value of the reference radius difference m1 exceeds the preset radius difference threshold m. If the result is negative, it indicates that the length error of each engagement tooth in the synchronizer being tested does not have a negative impact on actual use, and the accuracy of the engagement tooth being tested is qualified. If the result is positive, it indicates that the length of each engagement tooth in the synchronizer being tested does not meet the accuracy requirements, the test is stopped, and the test result is fed back.

[0064] To reduce errors, in Example 1, after acquiring initial data using a profilometer, the initial data is first converted into an electrical signal, and then the electrical signal is amplified and filtered to convert it into data for calculation, thereby improving the accuracy of the coordinate data.

[0065] Example 1 determines whether there are individual engagement teeth in the synchronizer that do not meet the accuracy requirements by judging whether all reference points fall within the circumference of the same reference circle; it determines whether all engagement teeth in the synchronizer are simultaneously offset by comparing the offset between the center of the circumference and the center of the synchronizer; and it determines whether the length of the engagement teeth in the synchronizer meets the accuracy requirements by comparing the size relationship between the radius of the circumference and the radius of the synchronizer. Compared with the prior art, which first collects the three-dimensional contour of the engagement teeth in the synchronizer and calculates the oblique angle and length of each engagement tooth one by one, resulting in a huge amount of detection and calculation, and only obtaining the detection accuracy of a single engagement tooth, especially for synchronizers with a large number of engagement teeth, the method provided in this application detects a two-dimensional plane, greatly reducing the amount of detection data that needs to be acquired, and avoiding detection errors caused by data acquisition. The method provided in this application is simple and easy to implement, especially for synchronizers with a large number of engagement teeth. The method provided in this application greatly reduces the workload of acquiring and calculating detection data, shortens the detection time, and obtains objective and reliable evaluation results, thus reducing detection costs.

[0066] Example 2

[0067] Based on the same inventive concept, as shown in the appendix Figure 3 As shown, Embodiment 2 provides a method for determining the quality of a synchronizer, wherein the synchronizer has 6 engagement teeth in the circumferential direction.

[0068] Perform step F1 to locate reference points E1, E2, ..., E6 on the reference section.

[0069] Perform step F2, draw a reference circle on the reference section, so that as many reference points as possible fall within the circumference of the reference circle.

[0070] On the reference cross section, the reference points, which are symmetrical about the diameter of the synchronizer, are located and connected to form a connecting line.

[0071] Reference points E1 and E4 are mirror images of each other about synchronizer O1; reference points E2 and E5 are mirror images of each other about the center O1 of the synchronizer; and reference points E3 and E6 are mirror images of each other about the center O1 of the synchronizer.

[0072] Connect reference point E1 and reference point E4 to form line l1, connect reference point E2 and reference point E5 to form line l2, and connect reference point E3 and reference point E6 to form line l3.

[0073] The connecting lines l1 and l2 intersect to form intersection point O2, the connecting lines l1 and l2 intersect to form intersection point O3, and the connecting lines l1 and l2 intersect to form intersection point O4.

[0074] When the precision of all mating teeth meets the precision requirements, the intersection points O2, O3, and O4 coincide and are the same intersection point. The intersection point O2 is used as the reference center, and the distance from O2 to E1 is used as the reference radius to draw a reference circle.

[0075] Since the intersection points O2, O3, and O4 do not coincide, meaning the connecting lines intersect to create multiple points, it is determined whether the maximum distance between the intersection points O2O4 is greater than the preset distance threshold D. If it exceeds the distance threshold D, it indicates that there are engagement teeth on the synchronizer being tested that do not meet the accuracy requirements, and the test ends and the test result is fed back.

[0076] When the maximum distance O2 O4 is less than or equal to the preset distance threshold D, O2 is the intersection point with the minimum distance to the center O1 of the synchronizer. Therefore, O2 is determined as the reference center. The distance r1 of O2E1 is used as the reference radius. When the synchronization circle radius r and the reference radius r1 are within the preset error range, the synchronizer being tested is determined to be a qualified product.

[0077] The determination method of Application Example 2 can quickly determine whether the precision of all the engagement teeth of the synchronizer under test meets the precision requirements and whether it affects the performance of the transmission when the number of engagement teeth of the synchronizer under test is large, such as 200. It can quickly determine qualified and unqualified products, with high detection accuracy, fast speed and low cost.

[0078] Example 3

[0079] Based on the same inventive concept, Embodiment 3 of this application provides an electronic device, as shown in the appendix. Figure 4 As shown, it includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. When the processor 302 executes the program, it implements the steps of the above-described method for determining the quality of a synchronizer.

[0080] Among them, Figure 4In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 306 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.

[0081] Example 4

[0082] Based on the same inventive concept, Embodiment 4 of the present invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described method for determining the quality of a synchronizer.

[0083] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0084] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0085] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0086] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0087] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0088] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the electronic device according to embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0089] The above descriptions are merely embodiments of this application. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this application. These should also be considered within the scope of protection of this application, and will not affect the effectiveness of the implementation of this application or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for determining the quality of a synchronizer, wherein the synchronizer is provided with a plurality of engagement teeth in its circumferential direction, each engagement tooth including a first side and a second side, characterized in that, The determination method includes: The pitch circle of the mating tooth is positioned, and the circumference of the pitch circle intersects with the first side to form an intersection point, with the plane containing the plurality of intersection points serving as a reference section. On the reference cross section, a reference line is drawn along the first side, starting from the intersection point, and the end point of the reference line is taken as the reference point; wherein, the length of the reference line is the theoretical pitch of the synchronizer; Draw a reference circle on the reference section, so that as many reference points as possible fall within the circumference of the reference circle; Based on the number of reference points falling into the circumference and the parameters of the reference circle, it is determined whether the synchronizer is a qualified product.

2. The method for determining the quality of a synchronizer as described in claim 1, characterized in that, The step of drawing a reference circle on the reference cross-section, such that as many reference points as possible fall within the circumference of the reference circle, includes: When the number of engagement teeth is even, on the reference cross section, the reference points that are mirror-symmetrical about the center of the synchronizer are connected in pairs by connecting lines, and the intersection point formed by the intersection of multiple connecting lines is taken as the reference center of the reference circle. The distance from the center of the reference circle to any of the reference points is taken as the reference radius.

3. The method for determining the quality of a synchronizer as described in claim 2, characterized in that, When the number of intersections formed by multiple connecting lines is greater than 1, the maximum distance between the intersections is obtained. When the maximum distance is greater than a preset distance threshold, the synchronizer is determined to be a defective product.

4. The method for determining the quality of a synchronizer as described in claim 3, characterized in that, When the maximum distance is less than or equal to a preset distance threshold, the intersection point with the smallest distance to the center of the synchronizer is determined as the reference center.

5. The method for determining the quality of a synchronizer as described in claim 1, characterized in that, The step of drawing a reference circle on the reference cross-section, such that as many reference points as possible fall within the circumference of the reference circle, includes: On the reference cross section, a reference circle is drawn with the center of the synchronizer as the initial center and the distance from the reference point to the initial center as the initial radius. Adjust the position of the initial center and the length of the initial radius until as many reference points as possible fall within the circumference of the reference circle.

6. The method for determining the quality of a synchronizer as described in claim 1, characterized in that, Determining whether the synchronizer is a qualified product based on the number of reference points falling into the circumference and the parameters of the reference circle includes: Determine whether all the reference points fall within the circumference; If the determination result is yes, determine whether the offset between the reference center and the center of the synchronizer exceeds a preset center offset threshold. If the judgment result is yes, calculate the difference between the synchronizer radius and the reference radius, and determine whether the difference exceeds a preset radius difference threshold.

7. The method for determining the quality of a synchronizer as described in claim 6, characterized in that, After determining whether all the reference points fall within the circumference, if the determination result is negative, the reference points that fail to fall within the circumference are repositioned to eliminate positioning errors.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method as described in any one of claims 1-7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1-7.

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