A method and system for detecting a universal joint assembly

Abstract

The present application relates to the technical field of detection, and relates to a universal joint assembly detection method and system.A universal joint assembly detection method comprises the following steps: based on a first detection rule, a predetermined pressing area and a predetermined measurement area of a cover plate unit are obtained; a pressing assembly is driven to move along a detection direction and press the first pressing position of the predetermined pressing area, at least part of a supporting assembly and a shaft sleeve assembly sleeved on the supporting assembly move along the detection direction; based on the first supporting part of the supporting assembly and the cover plate unit moving to a target abutting position and staying for a first measurement duration, a first reference value and a second reference value are respectively obtained; based on a second detection rule, a first predetermined range corresponding to the first reference value and a second predetermined range corresponding to the second reference value are obtained; based on the first predetermined range and the sum of the first predetermined range and the second predetermined range being within an error range, a first parallelism requirement is met. The problem of improving the measurement accuracy of the parallelism of the two connecting surfaces after the cover plate and the shaft sleeve are connected is solved.

Description

Technical Field

[0001] This invention relates to the field of testing tooling technology, and more specifically, to a method and system for testing universal joint components. Background Technology

[0002] The cover plate and bushing connection is typically used at the end of a universal joint. The bushing, mounted on the shaft, provides support, wear resistance, and positioning. The universal joint connects to other mechanical parts via the cover plate, fixing the bushing to prevent movement. During assembly, the parallelism of the connection surfaces between the cover plate and bushing directly affects the smooth operation and service life of the universal joint assembly. Existing testing methods often rely on manual measurement, sampling with simple measuring tools, or single-point testing with a dial indicator. These methods struggle to accurately assess the parallelism of the connection surfaces for each component, and the measurement results are easily affected by the operator's skill level and the chosen measurement location, leading to poor consistency in testing.

[0003] Furthermore, during the actual connection process between the cover plate and the bushing, due to the cover plate's own structure, the cover plate is prone to tilting or deflection relative to the bushing end face, making it difficult to guarantee the parallelism between the two connecting surfaces. If the parallelism exceeds the tolerance, it will cause additional vibration and noise during operation of the universal joint, accelerating wear. Therefore, after the cover plate and bushing are connected, how to improve the measurement accuracy of the parallelism between the two connecting surfaces has become an urgent technical problem to be solved in this field. Summary of the Invention

[0004] To address the issue of improving the measurement accuracy of the parallelism between the two connecting surfaces after the cover plate and bushing are connected, this invention provides a method and system for detecting universal joint components.

[0005] In a first aspect, the present invention provides a method for detecting a universal joint assembly, comprising:

[0006] Based on the first detection rule, a preset pressing area and a preset measurement area of ​​the cover plate unit are obtained; wherein, the preset pressing area includes one of the first main body and the second main body, and the preset measurement area is the other of the two; the cover plate unit includes a third main body and the first main body and the second main body respectively connected to opposite sides of the third main body;

[0007] The driving pressing assembly moves along the detection direction and presses the first pressing position of the preset pressing area, and at least part of the support assembly and the bushing assembly sleeved on the support assembly move along the detection direction; wherein, the bushing assembly includes a bushing unit with an opening and the cover plate unit, and the cover plate unit is disposed along the detection direction on the side of the bushing unit away from the opening;

[0008] Based on the first support part of the support assembly and the cover plate unit moving to the target abutment position and staying for a first measurement period, the first reference value of the first detection part and the second reference value of the second detection part are obtained respectively; wherein, the target abutment position includes the first detection part abutting against the side of the first support part away from the bushing assembly and the second detection part abutting against the side of the preset measurement area facing the bushing unit;

[0009] Based on the second detection rule, obtain the first preset range corresponding to the first reference value and the second preset range corresponding to the second reference value;

[0010] Based on the fact that the first preset range is within the error range and the sum of the first preset range and the second preset range is within the error range, the connection surface between the cover plate unit and the bushing unit along the axial direction of the bushing unit satisfies the first parallelism requirement.

[0011] Optionally, the first detection rule includes:

[0012] Based on the fact that the bushing unit is sleeved on the first support and the cover plate unit is located between the pressing assembly and the support assembly, the pressing assembly is driven to abut against the second pressing position of the cover plate unit along the detection direction; wherein, the second pressing position includes the center position of the cover plate unit along the central axis;

[0013] Based on the movement of the bushing assembly and the first support portion along the detection direction to the target abutment position and the stay for a second measurement period, a third reference value of the second detection portion is obtained; wherein, the target abutment position further includes the inner end face of the bushing unit abutting the first support portion along the axial direction, and at least one of the first main body portion and the second main body portion abutting the second support portion; the second support portion is sleeved on the outer peripheral side of the first support portion;

[0014] Based on the third reference value being within the measurement range, one of the first main body portion or the second main body portion corresponding to the third reference value is obtained as the preset pressing area, and the other is the preset measurement area.

[0015] Optionally, the first measurement duration is longer than the second measurement duration.

[0016] Optionally, the gimbal assembly detection method further includes:

[0017] The connection surfaces of the cover plate unit and the bushing unit along the axial direction of the bushing unit meet the first parallelism requirement, driving the pressing assembly to move away from the bushing assembly;

[0018] Based on driving the preset measurement area to rotate along the central axis several times by a second preset angle, multiple fourth reference values ​​of the second detection unit within the preset measurement area are obtained;

[0019] Based on multiple fourth reference values, obtain a third preset range corresponding to each fourth reference value;

[0020] Based on the fact that the sum of the first preset range and each of the third preset ranges is within the error range, the connection surface between the cover plate unit and the bushing unit along the axial direction of the bushing unit satisfies the second parallelism requirement.

[0021] Optionally, the second detection rule includes:

[0022] The first preset range = first reference value - first system error; the second preset range = second reference value - second system error; the third preset range = fourth reference value - second system error.

[0023] Optionally, the gimbal assembly detection method further includes:

[0024] Obtain the error range of the gimbal assembly;

[0025] Based on the first standard rule, the first detection unit and the second detection unit are calibrated to zero.

[0026] Optionally, the first standard rule includes:

[0027] Based on the standard bushing being fitted onto the first support and the standard cover plate being located between the pressing assembly and the support assembly, the pressing assembly is driven to abut against the second standard pressing position of the standard cover plate along the detection direction; wherein, the standard workpiece includes the standard bushing and the standard cover plate;

[0028] Based on the standard workpiece and the first support moving along the detection direction to the standard target contact position, the first detection part and the second detection part are zeroed.

[0029] Optionally, the gimbal assembly detection method further includes:

[0030] The first and second detection units are calibrated to zero, driving the pressing assembly to move away from the standard workpiece;

[0031] Based on the second standard pressing position of the standard pressing area, which is driven to move along the detection direction and press the standard pressing component, the first support and the standard cover plate move to the standard target contact position, and the first system error of the first detection unit and the second system error of the second detection unit are obtained respectively.

[0032] Secondly, the present invention provides a universal joint assembly detection system, applicable to any optional universal joint assembly detection method, the universal joint assembly detection system comprising:

[0033] Base assembly;

[0034] A pressing assembly is disposed on the base assembly;

[0035] The support assembly includes a first support portion and a second support portion disposed on the base assembly and disposed axially opposite to the pressing assembly; the second support portion is located on the outer peripheral side of the first support portion and has a gap with the outer peripheral side of the first support portion.

[0036] The detection assembly includes a first detection part and a second detection part disposed on the base assembly;

[0037] A bushing assembly includes a bushing unit with an opening and a cover plate unit; the cover plate unit is disposed along the detection direction on the side of the bushing unit away from the opening; wherein, the cover plate unit includes a third main body portion and a first main body portion and a second main body portion respectively connected to opposite sides of the third main body portion; the universal joint assembly detection system includes a detection state; in the detection state, the bushing unit is located in the gap and sleeved on the first support portion, and the cover plate unit is located between the pressing assembly and the support assembly.

[0038] Optionally, the support assembly further includes an elastic portion; the elastic portion is disposed between the first support portion and the base assembly.

[0039] To address the issue of improving the measurement accuracy of the parallelism between the two connecting surfaces after the cover plate and bushing are connected, this invention has the following advantages:

[0040] The cover plate unit is divided into a preset pressing area and a preset measurement area by a first detection rule. Relying on the coordinated action of the pressing component, support component, and bushing component along the detection direction, stable pressing at the first pressing position of the preset pressing area is achieved. Simultaneously, the pressing force applied by the pressing component avoids the preset measurement area, eliminating interference from pressing deformation on measurement accuracy. It is determined whether the first preset range corresponding to the first reference value is within the error range to confirm that the detection results of the first support and the preset pressing area are stable and normal. Then, it is determined whether the sum of the first preset range and the second preset range is also within the error range. If the sum is qualified, it indicates that the difference between the preset measurement area and the first support is controlled within the allowable limit. This difference directly reflects the degree of inclination of the cover plate unit relative to the bushing unit. Compared to existing measurement methods that can only obtain single-point detection results, this invention uses a dual judgment condition—the single value of the first preset range and the sum of the first and second preset ranges—to specifically verify the first parallelism of the axial connection surface between the cover plate unit and the bushing unit, thereby improving the measurement accuracy of the parallelism of the cover plate unit and the bushing unit along the axial connection surface. Attached Figure Description

[0041] Figure 1 A schematic flowchart of a gimbal assembly detection method according to one embodiment is shown;

[0042] Figure 2 A cross-sectional view of a gimbal assembly detection system according to one embodiment is shown;

[0043] Figure 3 A partial cross-sectional view of a gimbal assembly detection system according to one embodiment is shown;

[0044] Figure 4 A perspective view of a bushing assembly of a universal joint assembly detection system according to one embodiment is shown;

[0045] Figure 5 A cross-sectional view of the detection state of a gimbal assembly detection system according to an embodiment is shown;

[0046] Figure 6 Another cross-sectional view of the detection status of a universal joint assembly detection system according to one embodiment is shown.

[0047] Reference numerals: 10, base assembly; 11, first base; 12, second base; 13, drive unit; 20, pressing assembly; 21, connecting part; 22, pressing part; 30, support assembly; 31, first support part; 32, second support part; 321, support body; 322, detection hole; 33, elastic part; 40, detection assembly; 41, first detection part; 42, second detection part; 50, bushing assembly; 51, bushing unit; 52, cover plate unit; 521, first main body part; 522, second main body part; 523, third main body part; 524, mounting hole. Detailed Implementation

[0048] The invention will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are described merely to enable those skilled in the art to better understand and thus implement the invention, and are not intended to imply any limitation on the scope of the invention.

[0049] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances. In addition, the terms "installed", "set", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0050] In traditional mechanical structures, the cover plate and bushing connection is typically used at the end of a universal joint to ensure its stability in the transmission system. However, in actual manufacturing processes, improper welding of the cover plate and bushing can lead to non-parallelism of the two connecting surfaces, causing breakage or assembly failure, which affects the service life of subsequent assemblies with other mechanical structures. Therefore, improving the measurement accuracy of the parallelism of the two connecting surfaces after the cover plate and bushing connection has become an urgent technical problem to be solved in this field.

[0051] Example 1

[0052] This embodiment discloses a method for detecting a gimbal assembly. Please refer to [link / reference]. Figure 1 This includes steps S10-S50:

[0053] Step S10: Based on the first detection rule, obtain the preset pressing area and preset measurement area of ​​the cover plate unit 52; wherein, the preset pressing area includes one of the first main body part 521 and the second main body part 522, and the preset measurement area is the other of the two; the cover plate unit 52 includes a third main body part 523 and a first main body part 521 and a second main body part 522 respectively connected to opposite sides of the third main body part 523; specifically, the preset pressing area and preset measurement area of ​​the cover plate unit 52 are divided by the first detection rule, and the first main body part 521 and the second main body part 522 are respectively distinguished as the pressing bearing area and the data measurement area, clarifying the two core functional areas of the detection operation, and the first pressing position of the pressing component 20 pressing the preset pressing area, so that the pressing force applied by the pressing component 20 avoids the preset measurement area, thereby structurally eliminating the interference of pressing deformation on the measurement accuracy. The preset pressing area refers to the main body of the cover plate unit 52 that is closer to the support component 30 along the axial direction, i.e., the lower side; the preset measurement area refers to the main body that is further away from the support component 30 along the axial direction, i.e., the higher side of the cover plate unit 52.

[0054] In step S20, the driving pressing assembly 20 moves along the detection direction and presses the first pressing position of the preset pressing area, at least part of the support assembly 30 and the bushing assembly 50 sleeved on the support assembly 30 move along the detection direction; wherein, the bushing assembly 50 includes a bushing unit 51 with an opening and a cover plate unit 52, the cover plate unit 52 being disposed along the detection direction on the side of the bushing unit 51 away from the opening; wherein, the first pressing position includes a first main body portion 521 or a second main body portion 522 on which the central axis of the pressing assembly 20 coincides with the mounting hole 524; wherein, both the first main body portion 521 and the second main body portion 522 are provided with a mounting hole 524. Specifically, both the first main body portion 521 and the second main body portion 522 are provided with mounting holes 524 for connecting with other external machinery via fasteners such as bolts, facilitating assembly.

[0055] Specifically, in step S20, the pressing component 20 applies axial pressure to the preset pressing area (lower side) of the cover plate unit 52, and at the same time drives the first support part 31 of the support component and the entire bushing assembly 50 to move synchronously along the detection direction (e.g., downward). The detection direction is the direction in which the pressing component 20 approaches the bushing assembly 50 or the support component 30. In this embodiment, it is a direction perpendicular to the horizontal plane, but the specific direction depends on the actual application.

[0056] Step S30: Based on the first support part 31 and cover plate unit 52 of support component 30 moving to the target abutment position and staying for a first measurement time, the first reference value of the first detection part 41 and the second reference value of the second detection part 42 are obtained respectively; wherein, the target abutment position includes the first detection part 41 abutting with the side of the first support part 31 away from the bushing component 50 and the second detection part 42 abutting with the side of the preset measurement area facing the bushing unit 51; wherein, the first measurement time refers to the time when the pressing component 20 presses the preset pressing area. Relying on the double abutment constraint of the target abutment position, the fitting state of the first detection part 41 and the first support part 31, and the second detection part 42 and the preset measurement area are locked respectively. With the fixed dwell time, the data fluctuation caused by dynamic displacement is avoided, and the collected first reference value and second reference value have authenticity and stability, which are consistent with the actual assembly fitting state.

[0057] Step S40: Based on the second detection rule, obtain the first preset range corresponding to the first reference value and the second preset range corresponding to the second reference value. Specifically, the first reference value can reflect the offset of the preset pressing area and the first support part moving along the detection direction, and the second reference value can reflect the offset of the preset measurement area moving along the detection direction, as well as the additional offset caused by the non-parallelism of the connection surfaces of the cover plate unit 52 and the bushing unit 51. The first reference value and the second reference value cannot directly determine the parallelism. It is necessary to consider the system error together with the first reference value and the second reference value (see below) to obtain the corresponding first preset range and the second preset range respectively and then make a joint judgment to improve the parallelism accuracy measurement.

[0058] Step S50: Based on the fact that the first preset range is within the error range and the sum of the first preset range and the second preset range is within the error range, the connection surface between the cover plate unit 52 and the bushing unit 51 along the axial direction of the bushing unit 51 meets the first parallelism requirement.

[0059] Understandably, the first step is to determine whether the first preset range corresponding to the first reference value is within the error range to confirm that the detection and assembly of the first support part 31 and the preset pressing area are stable and normal. Then, it is determined whether the sum of the first preset range and the second preset range is also within the error range. When the first preset range is within the error range, it means that the first support part 31 and the inner end face of the bushing unit 51 are in parallel contact, and the movement deviation of the preset pressing area is within the allowable limit. The sum of both being within the error range indicates that the difference between the detection result of the preset measurement area and the detection result of the first support part is controlled within the allowable limit. This difference reflects the degree of inclination of the cover plate unit relative to the bushing unit. The first parallelism represents the parallelism of the two connecting surfaces when the two ends of the cover plate unit 52 are tilted left and right. By comparing the two preset ranges with the error range, both the assembly accuracy of a single area and the overall accuracy of the connecting surfaces are verified, achieving a preliminary and accurate detection of the parallelism of the two connecting surfaces of the bushing assembly 50.

[0060] Furthermore, the first detection rule in step S10 includes steps S11-S13, which are executed sequentially: steps S11, S12, and S13. Steps S11-S13 are as follows:

[0061] Step S11: Based on the bushing unit 51 being sleeved on the first support part 31 and the cover plate unit 52 being located between the pressing assembly 20 and the support assembly 30, the pressing assembly 20 is driven to abut against the second pressing position of the cover plate unit 52 along the detection direction; wherein, the second pressing position includes the center position of the cover plate unit 52 along the central axis; wherein, the second pressing position includes the center position of the cover plate unit 52 along the central axis; it can be understood that the second pressing position refers to the center position of the third main body part 523 of the cover plate unit 52 pressed by the pressing assembly 20, which is used to subsequently obtain the preset pressing area.

[0062] Please refer to Figure 2 and Figure 3 Understandably, the second support 32 is fitted onto the outer periphery of the first support 31, with a gap between them to accommodate the bushing unit 51. When the bushing unit 51 is located in this gap position, its inner and outer peripheral walls abut against the second support 32 and the first support 31, respectively, with the abutment gap approaching zero, thereby reducing the impact of systematic errors caused by the gap on measurement accuracy. When the bushing unit 51 is located in this gap position, the cover plate unit 52 is located on the side of the second support 32 and the first support 31 closest to the pressing assembly 20, and the orthographic projection of the cover plate unit 52 along the detection direction coincides with the orthographic projection of the second support 32 along the detection direction, subject to actual application.

[0063] Step S12: Based on the movement of the bushing assembly 50 and the first support part 31 along the detection direction to the target abutment position and the stay for a second measurement period, a third reference value of the second detection part 42 is obtained; wherein, the target abutment position also includes the inner end face of the bushing unit 51 abutting the first support part 31 along the axial direction, and at least one of the first main body part 521 and the second main body part 522 abutting the second support part 32; the second support part 32 is sleeved on the outer periphery of the first support part 31; specifically, the tilting height of the two end faces of the cover plate unit 52 is determined by the third reference value, thereby determining the preset pressing area and preset detection area of ​​the pressing assembly 20.

[0064] In step S13, based on the third reference value within the measurement range, one of the first main body 521 or the second main body 522 corresponding to the third reference value is designated as the preset pressing area, and the other as the preset measurement area. The measurement range can be the allowable tilt angle and the allowable stroke calculated based on a trigonometric function of the length of the cover unit 52, corresponding to the runout value on the second detection unit. The allowable tilt angle is the maximum tilt angle that the cover unit 52 can tilt relative to the inner end face of the bushing unit 51. This maximum tilt angle does not affect the performance of the bushing assembly 50. The maximum tilt angle is, for example, 5°-10°, but not limited to this, depending on the actual application. After completing steps S11-S13, the pressing assembly 20 is driven to reset, and then step S20 is entered, where the pressing assembly 20 is driven to move and press the first pressing position of the preset pressing area.

[0065] Please refer to Figure 3 and Figure 6 Furthermore, the first measurement duration is longer than the second measurement duration.

[0066] In this embodiment, the cover plate unit 52 has a preset thickness along the axial direction, such as 2mm-5mm, 5mm-8mm, etc. The pressing component 20 is, for example, a cylinder. To ensure manufacturing and measurement costs, the pressing component 20 has insufficient precision in controlling the pressing force applied to the cover plate unit 52. Therefore, based on the fact that the second measurement time is shorter than the first measurement time, the duration of the pressing component 20 acting on the third main body 523 is reduced. This speeds up the detection efficiency while reducing the impact of the unstable pressing force that the pressing component 20 may apply on the cover plate unit 52. It also avoids the local bending deformation and secondary deformation of the thinner cover plate unit 52 caused by the pressing component 20 abutting and pressing for a long time. Based on the above, the efficiency of the detection process of the present invention and the manufacturing cost of the system (such as the pressing component 20) are improved.

[0067] Furthermore, in step S11, the pressing component 20 moves with a first driving force and presses against the second pressing position of the cover plate unit 52, i.e., the center position of the third main body 523; in step S20, the pressing component 20 moves with a second driving force and presses against the first pressing position of the preset pressing area, i.e., the preset pressing area; wherein, the second driving force is greater than the first driving force, so as to avoid the unstable pressing force of the pressing component 20 causing local deformation of the cover plate unit 52 with a relatively thin preset thickness, thereby improving the efficiency of the detection process of the present invention and the manufacturing cost of the system.

[0068] Specifically, since the first measurement duration is longer than the second measurement duration, the first and second detection units can stably collect the first and second reference values, so that the reference values ​​match the actual assembly and fitting state.

[0069] Furthermore, the universal joint component detection method also includes steps S60-S90, which are executed sequentially after step S50, namely steps S60, S70, S80, and S90. Steps S60-S90 are as follows:

[0070] In step S60, the connection surfaces of the cover plate unit 52 and the bushing unit 51 along the axial direction of the bushing unit 51 meet the first parallelism requirement, and the pressing assembly 20 is driven to move away from the bushing assembly 50. It can be understood that if the measured parallelism meets the first parallelism requirement, the pressing assembly 20 retracts and releases the pressing force on the cover plate unit 52.

[0071] Step S70: Based on the second preset angle, the second detection unit 42 is rotated several times along the central axis to obtain multiple fourth reference values ​​within the preset measurement area. Specifically, the second preset angle can be less than 10°, 15° or 20°, depending on the actual application.

[0072] Please refer to Figure 5 It is understandable that, in addition to the left and right tilting (e.g., radial) at both ends of the cover plate, the tilting of the cover plate unit 52 may also include the front and back tilting of the cover plate. That is, there may be local twisting or warping of the connection surface between the cover plate unit 52 and the bushing unit 51. Therefore, the fourth reference value at different angles will show differences. The fourth reference value can reflect the offset of the local position of the cover plate unit 52 after it is rotated slightly at the second preset angle along the detection direction. Through multi-point measurement, local parallelism defects that cannot be detected by single-point measurement can be detected, thereby improving the parallelism accuracy of the two connection surfaces after the bushing unit 51 and the cover plate unit 52 are connected.

[0073] Step S80: Based on multiple fourth reference values, obtain the third preset range corresponding to each fourth reference value. This can effectively detect local twisting or warping defects on the connection surface between the cover plate unit 52 and the bushing unit 51, and realize a comprehensive and high-precision evaluation of the parallelism of the connection surface.

[0074] Specifically, the third preset range takes into account the fourth reference value and system error.

[0075] Step S90: Based on the fact that the sum of the first preset range and each of the third preset ranges is within the error range, the connection surfaces of the cover plate unit 52 and the bushing unit 51 along the axial direction of the bushing unit 51 meet the second parallelism requirement. The second parallelism requirement refers to the parallelism of the two connection surfaces when the cover plate unit 52 is tilted forward or backward. Based on the first and second parallelism requirements, a step-by-step screening of the parallelism measurement of the bushing unit 51 and the cover plate unit 52 is achieved. Under the premise that the bushing unit 51 and the cover plate unit 52 meet the first parallelism requirement, further measurements are taken to determine whether the bushing unit 51 and the cover plate unit 52 meet the second parallelism requirement. This avoids assembly or lifespan problems caused by local deformation of the cover plate unit 52, further improving the parallelism measurement accuracy of the bushing assembly 50.

[0076] Further, in step S40, the second detection rule includes:

[0077] The first preset range = first reference value - first systematic error; the second preset range = second reference value - second systematic error; the third preset range = fourth reference value - second systematic error. Understandably, when the bushing unit 51 is located in the gap between the first support portion 31 and the second support portion 32, the systematic error caused by the fit gap between the inner and outer peripheral walls of the bushing unit 51 and the first and second support portions 31 and 32 needs to be considered. Based on the first reference value, the second reference value, and the third reference value, the corresponding systematic errors are eliminated, so that the first preset range, the second preset range, and the third preset range can truly reflect the offset of the bushing assembly 50 itself, thereby improving the measured parallelism accuracy of the two connecting surfaces of the bushing assembly 50.

[0078] Furthermore, the universal joint component detection method also includes steps S01-S02, which are executed sequentially before step S10: steps S01, S02, S021, S022, S03, and S04. Steps S01-S02 are as follows:

[0079] Step S01: Obtain the error range of the universal joint assembly; it can be understood that the allowable error range of the bushing assembly 50 to be tested after welding is obtained. The error range refers to the allowable parallelism deviation range of the connection surface that is preset according to the design requirements of the universal joint assembly. In this embodiment, the error range can be ±0.1, including but not limited to this, and the specific application shall prevail.

[0080] Step S02: Based on the first standard rule, the first detection unit 41 and the second detection unit 42 are corrected to zero.

[0081] Specifically, the first detection unit 41 and the second detection unit 42 can be dial indicators. When inspecting a standard workpiece, the readings of the initial probe positions of the two dial indicators are set to zero, which serves as the measurement reference. This eliminates the interference of initial readings caused by probe preload and installation offset, and simplifies the data reading for subsequent inspections.

[0082] Further, in step S02, the first standard rule includes steps S021-S022:

[0083] Step S021: Based on the standard bushing being fitted onto the first support 31 and the standard cover plate being located between the pressing assembly 20 and the support assembly 30, the pressing assembly 20 is driven to abut against the second standard pressing position of the standard cover plate along the detection direction; wherein, the standard workpiece includes the standard bushing and the standard cover plate;

[0084] Understandably, before formally testing the parallelism of the two connecting surfaces of the bushing assembly 50, a standard workpiece will be tested first, and its parallelism will be qualified, thus obtaining a preset standard range for comparison with the bushing assembly 50 to be tested. Among them, the second standard pressing position includes the center position of the standard cover plate along the central axis.

[0085] Step S022: Based on the standard workpiece and the first support 31 moving along the detection direction to the standard target contact position, the first detection part 41 and the second detection part 42 are zeroed.

[0086] Understandably, the standard target contact position includes the inner end face of the standard bushing contacting the first support part 31, and one main body of the standard cover plate contacting the second support part 32; at the standard target contact position, the readings of the first detection part 41 and the second detection part 42 are zero.

[0087] Furthermore, prior to step S10, the gimbal assembly detection method also includes steps S03-S04:

[0088] In step S03, the first detection unit 41 and the second detection unit 42 are calibrated to zero, and the pressing assembly 20 is driven to move away from the standard workpiece. Further, after the detection reference is aligned, the pressing assembly 20 also needs to be retracted to release the pressure on the cover plate unit 52.

[0089] In step S04, based on the second standard pressing position of the standard pressing area where the driving pressing component 20 moves along the detection direction and presses the standard pressing area, the first support part 31 and the standard cover plate move to the standard target contact position, and the first system error of the first detection part 41 and the second system error of the second detection part 42 are obtained respectively.

[0090] Understandably, the standard cover plate is a symmetrical part with acceptable parallelism; therefore, the standard pressing area is any one end face of the standard cover plate, and the second standard pressing position is inside the hole on any one end face of the standard cover plate. By introducing a systematic error calibration step based on the standard workpiece, the measurement error inherent in the universal joint assembly inspection system itself is eliminated, further improving the consistency of the measurement results.

[0091] Example 2

[0092] In this embodiment, a gimbal assembly detection system is provided, specifically including:

[0093] Base assembly 10;

[0094] The pressing component 20 is disposed on the base component 10;

[0095] The support assembly 30 includes a first support portion 31 and a second support portion 32 disposed on the base assembly 10 and disposed axially opposite to the pressing assembly 20; the second support portion 32 is located on the outer peripheral side of the first support portion 31 and has a gap with the outer peripheral side of the first support portion 31.

[0096] The detection component 40 includes a first detection part 41 and a second detection part 42 disposed on the base component 10;

[0097] Please refer to Figure 4 and Figure 6 The bushing assembly 50 includes a bushing unit 51 with an opening and a cover plate unit 52; the cover plate unit 52 is disposed on the side of the bushing unit 51 away from the opening along the detection direction; wherein, the cover plate unit 52 includes a third main body portion 523 and a first main body portion 521 and a second main body portion 522 respectively connected to opposite sides of the third main body portion 523; the universal joint assembly detection system includes a detection state; in the detection state, the bushing unit 51 is located in the gap and sleeved on the first support portion 31, and the cover plate unit 52 is located between the pressing assembly 20 and the support assembly 30.

[0098] Please refer to Figure 4Specifically, the base assembly 10 includes a first base 11, a second base 12, and a drive unit 13. The pressing assembly 20 and the support assembly 30 are disposed opposite each other on the first base 11. The drive unit 13 connects to the first base 11 and simultaneously drives the pressing assembly 20 to perform the pressing operation. The second base 12 is coaxial with the support assembly 30, and a first detection unit 41 is disposed on the second base 12. The pressing assembly 20 includes a connecting part 21 and a pressing part 22. The connecting part 21 serves a connecting function, with one side connected to the drive unit 13 and the other side slidably connected to the pressing part 22. The pressing part 22 moves along the detection direction via the drive unit 13 and presses the bushing assembly 50. The pressing part 22 can also move horizontally on the connecting part 21. In the detection state, the bushing assembly 50 is installed in the gap of the support assembly 30, with the bushing assembly 50 directly opposite the pressing part 22.

[0099] Please refer to Figure 4 and Figure 5 The pressing part 22 moves the pressing bushing assembly 50 for detection via the drive part 13. The bushing assembly 50 is installed in the hole of the support assembly 30 and is directly opposite the pressing part 22. The bushing assembly 50 includes a bushing unit 51, a cover plate unit 52 and a mounting hole 524. The bushing unit 51 is sleeved on the hole of the support assembly 30 and the cover plate unit 52 is welded above it. The cover plate unit 52 also includes a first main body part 521, a second main body part 522 and a third main body part 523. The mounting hole 524 is provided on the first main body part 521 and the second main body part 522 for connecting with other external machinery by fasteners such as bolts, which facilitates assembly.

[0100] Furthermore, the support assembly 30 for mounting the bushing assembly 50 includes a first support portion 31 and a second support portion 32. The first support portion 31 is disposed in the middle of the support assembly 30 to support the bushing assembly 50. The second support portion 32 is sleeved on the outer periphery of the first support portion 31 and forms a gap to accommodate the bushing assembly 50. The second support portion 32 also includes a support body 321 and a detection hole 322. The support body 321 is sleeved on the outer periphery of the first support portion 31 and forms a gap to accommodate the bushing assembly 50. A detection hole 322 is provided on one side of the support body 321 for placing the second detection portion 42. For example, the first detection portion 41 and the second detection portion 42 include a detection body and a telescopic body. One end of the telescopic body is connected to the detection body, and the other end extends and retracts when it abuts against the first support portion 31 or a preset measurement area, causing the internal value of the detection body to fluctuate.

[0101] Furthermore, the support assembly 30 also includes an elastic portion 33; the elastic portion 33 is disposed between the first support portion 31 and the base assembly 10. It can be understood that the elastic portion 33 provides axial preload to the first support portion 31, so that it maintains an initial gap with the first detection portion 41 when not under pressure; when pressed, the elastic portion 33 is compressed, and the first support portion 31 moves smoothly to abut against the first detection portion 41, avoiding rigid impact, while ensuring the repeatability of the first reference value for each detection.

[0102] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made in form and detail without departing from the scope of the present invention.

Claims

1. A method for detecting a universal joint assembly, characterized in that, include: Based on the first detection rule, a preset pressing area and a preset measurement area of ​​the cover plate unit are obtained; wherein, the preset pressing area includes one of the first main body and the second main body, and the preset measurement area is the other of the two; the cover plate unit includes a third main body and the first main body and the second main body respectively connected to opposite sides of the third main body; The driving pressing assembly moves along the detection direction and presses the first pressing position of the preset pressing area, and at least part of the support assembly and the bushing assembly sleeved on the support assembly move along the detection direction; wherein, the bushing assembly includes a bushing unit with an opening and the cover plate unit, and the cover plate unit is disposed along the detection direction on the side of the bushing unit away from the opening; Based on the first support part of the support assembly and the cover plate unit moving to the target abutment position and staying for a first measurement period, the first reference value of the first detection part and the second reference value of the second detection part are obtained respectively; wherein, the target abutment position includes the first detection part abutting against the side of the first support part away from the bushing assembly and the second detection part abutting against the side of the preset measurement area facing the bushing unit; Based on the second detection rule, obtain the first preset range corresponding to the first reference value and the second preset range corresponding to the second reference value; Based on the fact that the first preset range is within the error range and the sum of the first preset range and the second preset range is within the error range, the connection surface between the cover plate unit and the bushing unit along the axial direction of the bushing unit satisfies the first parallelism requirement.

2. The method for detecting a universal joint assembly according to claim 1, characterized in that, The first detection rule includes: Based on the fact that the bushing unit is sleeved on the first support and the cover plate unit is located between the pressing assembly and the support assembly, the pressing assembly is driven to abut against the second pressing position of the cover plate unit along the detection direction; wherein, the second pressing position includes the center position of the cover plate unit along the central axis; Based on the movement of the bushing assembly and the first support portion along the detection direction to the target abutment position and the stay for a second measurement period, a third reference value of the second detection portion is obtained; wherein, the target abutment position further includes the inner end face of the bushing unit abutting the first support portion along the axial direction, and at least one of the first main body portion and the second main body portion abutting the second support portion; the second support portion is sleeved on the outer peripheral side of the first support portion; Based on the third reference value being within the measurement range, one of the first main body portion or the second main body portion corresponding to the third reference value is obtained as the preset pressing area, and the other is the preset measurement area.

3. The method for detecting a universal joint assembly according to claim 2, characterized in that, The first measurement duration is longer than the second measurement duration.

4. The method for detecting a universal joint assembly according to claim 1, characterized in that, The gimbal assembly detection method further includes: The connection surfaces of the cover plate unit and the bushing unit along the axial direction of the bushing unit meet the first parallelism requirement, driving the pressing assembly to move away from the bushing assembly; Based on driving the preset measurement area to rotate along the central axis several times by a second preset angle, multiple fourth reference values ​​of the second detection unit within the preset measurement area are obtained; Based on multiple fourth reference values, obtain a third preset range corresponding to each fourth reference value; Based on the fact that the sum of the first preset range and each of the third preset ranges is within the error range, the connection surface between the cover plate unit and the bushing unit along the axial direction of the bushing unit satisfies the second parallelism requirement.

5. The method for detecting a universal joint assembly according to claim 4, characterized in that, The second detection rule includes: The first preset range = first reference value - first system error; the second preset range = second reference value - second system error; the third preset range = fourth reference value - second system error.

6. The method for detecting a universal joint assembly according to claim 1, characterized in that, The gimbal assembly detection method further includes: Obtain the error range of the gimbal assembly; Based on the first standard rule, the first detection unit and the second detection unit are calibrated to zero.

7. The method for detecting a universal joint assembly according to claim 6, characterized in that, The first standard rule includes: Based on the standard bushing being fitted onto the first support and the standard cover plate being located between the pressing assembly and the support assembly, the pressing assembly is driven to abut against the second standard pressing position of the standard cover plate along the detection direction; wherein, the standard workpiece includes the standard bushing and the standard cover plate; Based on the standard workpiece and the first support moving along the detection direction to the standard target contact position, the first detection part and the second detection part are zeroed.

8. A method for detecting a universal joint assembly according to claim 7, characterized in that, The gimbal assembly detection method further includes: The first and second detection units are calibrated to zero, driving the pressing assembly to move away from the standard workpiece; Based on the second standard pressing position of the standard pressing area, which is driven to move along the detection direction and press the standard pressing component, the first support and the standard cover plate move to the standard target contact position, and the first system error of the first detection unit and the second system error of the second detection unit are obtained respectively.

9. A universal joint component testing system, characterized in that, The universal joint assembly detection system, applicable to the universal joint assembly detection method according to any one of claims 1-8, comprises: Base assembly; A pressing assembly is disposed on the base assembly; The support assembly includes a first support portion and a second support portion disposed on the base assembly and disposed axially opposite to the pressing assembly; the second support portion is located on the outer peripheral side of the first support portion and has a gap with the outer peripheral side of the first support portion. The detection assembly includes a first detection part and a second detection part disposed on the base assembly; A bushing assembly includes a bushing unit with an opening and a cover plate unit; the cover plate unit is disposed along the detection direction on the side of the bushing unit away from the opening; wherein, the cover plate unit includes a third main body portion and a first main body portion and a second main body portion respectively connected to opposite sides of the third main body portion; the universal joint assembly detection system includes a detection state; in the detection state, the bushing unit is located in the gap and sleeved on the first support portion, and the cover plate unit is located between the pressing assembly and the support assembly.

10. A universal joint assembly testing system according to claim 9, characterized in that, The support assembly further includes an elastic portion; the elastic portion is disposed between the first support portion and the base assembly.

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