A system and method for detecting airfoil bushings

Abstract

This invention relates to the field of universal joint machining technology, specifically to an airfoil bushing inspection system and method. The airfoil bushing inspection system includes a base assembly, a positioning assembly, an inspection assembly, an airfoil bushing, and an inspection state. The positioning assembly is slidably connected to the base assembly; the inspection assembly includes an inspection seat, a first inspection unit, and a second inspection unit; the inspection seat is connected to the base assembly; the second inspection unit is connected to the inspection seat; the airfoil bushing includes a bushing body, a first airfoil, a first hole, and a positioning key; the first airfoil and the positioning key are respectively connected to the outer peripheral wall of the bushing body along its circumference; the first hole penetrates the first airfoil; the inspection state includes the bushing body being fitted onto the positioning assembly, the bottom surface of the bushing body abutting against the top surface of the positioning assembly, the sidewall of the positioning key entering the space surrounded by the sidewall of the first inspection unit, and the inner peripheral wall of the first hole abutting against the outer peripheral wall of the second inspection unit. This solves the problem of low inspection efficiency in airfoil bushing inspection systems.

Description

Technical Field

[0001] This invention relates to the field of universal joint machining technology, and more specifically, to an airfoil bushing inspection system and method. Background Technology

[0002] Universal joints are crucial components for transmitting power at varying angles between shafts. They are widely used in mechanical systems requiring non-coaxial, variable-angle power transmission, spanning transportation, industrial machinery, and construction machinery. The cross-shaft universal joint is a type of universal joint. For example, in automobiles, it connects the transmission output shaft to the drive shaft, or the drive shaft to the input shaft of the drive axle's main reducer, thus enabling variable-angle power transmission. A cross-shaft universal joint typically consists of a cross shaft, a wing bearing housing, and a bushing. The wing bearing sleeve is fitted onto the journal of the cross shaft, securing the wing bearing housing and firmly sealing the oil seal within the cross shaft. This prevents dust and rainwater from entering the wing bearing housing, protecting the cross shaft, reducing wear, and extending the service life of the universal joint.

[0003] After the airfoil bushing is machined, multiple machined dimensions need to be inspected. Because there are many dimensions to inspect, and existing airfoil bushing inspection systems typically require multiple inspection steps to complete the inspection of all machined dimensions, the inspection time is long, resulting in low production efficiency. Summary of the Invention

[0004] To address the problem of low detection efficiency in airfoil bushing inspection systems, this invention provides an airfoil bushing inspection system and method.

[0005] In a first aspect, the present invention provides an airfoil bushing detection system, comprising:

[0006] Base assembly;

[0007] A positioning component, wherein the positioning component is slidably connected to the base component;

[0008] The detection assembly includes a detection seat, a first detection unit, and a second detection unit; the detection seat is connected to the base assembly; the first detection unit is a groove in the detection seat; and the second detection unit is connected to the detection seat.

[0009] An airfoil bushing includes a bushing body, a first airfoil, a first hole, and a locating key; the bushing body is configured as a tube closed at one end; the first airfoil and the locating key are respectively connected to the outer peripheral wall of the bushing body along the circumference of the bushing body; the first hole penetrates the first airfoil;

[0010] The airfoil bushing detection system includes a detection state; the detection state includes the bushing body being fitted onto the positioning component, the bottom surface of the bushing body abutting against the top surface of the positioning component, the sidewall of the positioning key entering the space surrounded by the sidewall of the first detection unit, and the inner peripheral wall of the first hole abutting against the outer peripheral wall of the second detection unit.

[0011] In some embodiments, the first detection unit includes a pass detection window and a stop detection window; the pass detection window and the stop detection window are arranged sequentially along a first direction; the pass detection window and the stop detection window are respectively in the grooves of the detection seat; the projection area of ​​the pass detection window along the first direction is greater than or equal to the projection area of ​​the positioning key towards the pass detection window; the projection area of ​​the stop detection window along the first direction is within the projection area of ​​the pass detection window along the first direction; the projection area of ​​the stop detection window along the first direction is less than the projection area of ​​the positioning key towards the pass detection window; wherein, the first direction is the direction from the positioning component to the detection seat;

[0012] The airfoil bushing detection system also includes a qualified detection state; the qualified detection state includes the sidewall of the positioning key abutting against the sidewall of the through detection window, and one end of the positioning key along the first direction abutting against the stop detection window.

[0013] In some embodiments, the second detection unit includes a detection rod and a second guide portion; one end of the detection rod is connected to the detection seat, and the other end extends toward the positioning component; the outer diameter of the detection rod near the positioning component gradually decreases along a second direction to form the second guide portion; wherein, the second direction is the direction from the detection seat to the positioning component;

[0014] The detection state also includes the inner peripheral wall of the first hole being sleeved through the second guide portion and abutting against the outer peripheral wall of the detection rod.

[0015] In some embodiments, the second detection unit further includes a first guide portion; the outer diameter of the detection rod near the positioning component gradually decreases along the second direction to form the first guide portion and the second guide portion; the first guide portion is disposed on the side of the second guide portion away from the base component; the minimum outer diameter of the first guide portion is smaller than the minimum outer diameter of the second guide portion;

[0016] The detection state also includes the inner peripheral wall of the first hole being sleeved through the first guide part and the second guide part, and abutting against the outer peripheral wall of the detection rod.

[0017] In some embodiments, the positioning component includes a positioning seat, a positioning platform, a positioning post, and a guide block; the positioning seat, the positioning platform, and the positioning post are connected in sequence; the positioning seat is slidably connected to the base assembly; the positioning seat moves along the axial direction of the second detection unit; the diameter of the positioning platform is greater than the inner diameter of the bushing body; the difference between the inner diameter of the bushing body and the outer diameter of the positioning post is less than a first set value.

[0018] The guide block is connected to the positioning seat on the side near the positioning platform; the distance between the guide block and the second detection unit along the first direction gradually increases along the third direction to form an inclined surface;

[0019] The detection state also includes the bushing being fitted onto the outer circumferential surface of the positioning post, with the bushing abutting against the side of the positioning platform near the positioning post; wherein, during the process of the bushing being fitted onto the outer circumferential surface of the positioning post, the inclined surface of the guide block abuts against the first wing, such that the minimum included angle between the central axis of the first hole and the central axis of the second detection unit is less than or equal to a second set value.

[0020] In some embodiments, the airfoil bushing further includes a second airfoil and a second hole; the second airfoil and the positioning key are respectively connected to the outer peripheral wall of the bushing body along the circumferential direction of the bushing body; the second airfoil is spaced apart from the first airfoil; the second hole penetrates the second airfoil; the central axis of the first hole is parallel to the central axis of the second hole;

[0021] The detection component includes two second detection units;

[0022] The detection state also includes the inner peripheral wall of the second hole abutting against the outer peripheral wall of the second detection unit.

[0023] In some embodiments, the tolerance range between the base assembly, the positioning assembly, the detection seat, the first detection unit, and the second detection unit is smaller than the tolerance range between the bushing body, the first wing body, the first hole, and the positioning key.

[0024] In a second aspect, the present invention provides a method for detecting airfoil bushings, wherein the airfoil bushing detection method is applied to the airfoil bushing detection system of any embodiment of the first aspect, and the airfoil bushing detection method includes:

[0025] Triggered by a detection command, the bushing is placed on the outer periphery of the positioning component;

[0026] The positioning component moves toward the first detection unit;

[0027] The first detection unit's sidewall surrounds the space formed by the positioning key's sidewall, and the inner peripheral wall of the first hole abuts against the outer peripheral wall of the second detection unit, thus completing the detection.

[0028] In some embodiments, the movement of the positioning component toward the first detection unit includes:

[0029] The positioning component moves toward the first detection unit and enters the first hole from the outer peripheral wall of the second detection unit;

[0030] The positioning component continues to move toward the first detection unit until it enters the space surrounded by the side wall of the first detection unit.

[0031] In some embodiments, the second detection unit includes a detection rod, a second guide portion, and a first guide portion; one end of the detection rod is connected to the detection seat, and the other end extends toward the positioning component; the outer diameter of the end of the detection rod near the positioning component gradually decreases along a second direction to form the first guide portion and the second guide portion; the first guide portion is disposed on the side of the second guide portion away from the positioning component; the minimum outer diameter of the first guide portion is smaller than the minimum outer diameter of the second guide portion; wherein, the second direction is the direction from the detection seat to the positioning component;

[0032] The positioning component continues to move towards the first detection unit until it enters the space surrounded by the side wall of the first detection unit, including:

[0033] The positioning component moves toward the first detection unit until it enters the first hole through the first guide portion;

[0034] The positioning component continues to move toward the first detection unit until it enters the first hole through the second guide portion;

[0035] The positioning component continues to move toward the first detection unit until the detection rod enters the inner peripheral wall of the first hole.

[0036] To address the problem of low detection efficiency in airfoil bushing inspection systems, this invention offers the following advantages:

[0037] By setting positioning and detection components on the base assembly, the airfoil bushing, after being fitted onto the positioning component, can move towards the detection component along with the positioning component. This allows the sidewall of the positioning key to enter the space enclosed by the sidewall of the first detection unit, and the inner peripheral wall of the first hole to abut against the outer peripheral wall of the second detection unit. Thus, the detection of the first hole and the positioning key can be completed after the positioning component moves once, thereby completing the detection of multiple indicators of the airfoil bushing. This significantly improves the detection efficiency of the airfoil bushing detection system. Attached Figure Description

[0038] Figure 1 A schematic diagram of the structure of an airfoil bushing detection system according to one embodiment is shown;

[0039] Figure 2 It shows Figure 1 A schematic diagram of the positioning component in the diagram;

[0040] Figure 3 It shows Figure 1 A partial cross-sectional schematic diagram of the airfoil bushing detection system in the middle;

[0041] Figure 4 A flowchart illustrating an embodiment of an airfoil bushing detection method is shown.

[0042] Reference numerals: 10 Base assembly; 11 Base body; 12 First guide rail; 20 Positioning assembly; 21 Positioning seat; 22 Positioning stage; 23 Positioning column; 24 Guide block; 30 Detection assembly; 31 Detection seat; 32 First detection unit; 321 Through detection window; 322 Stop detection window; 33 Second detection unit; 331 Detection rod handle; 332 Detection guide rod; 333 Second guide rail; 334 Detection rod body; 335 First guide part; 336 Second guide part; 40 Airfoil bushing; 41 Bushing body; 42 First airfoil; 43 First hole; 44 Second airfoil; 45 Second hole; 46 Positioning key. Detailed Implementation

[0043] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0044] 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 this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being 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 application according to the specific circumstances. In addition, the terms "installed", "set up", "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 application 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.

[0045] Universal joints are crucial components in mechanical systems for transmitting power between rotating shafts at varying angles. A cross-shaped universal joint is one type of universal joint. The airfoil bushing 40 is one component of the cross-shaped universal joint. After machining, the machining tolerances of multiple dimensions of the airfoil bushing 40 need to be inspected. Typically, the keys and holes on the airfoil bushing 40 need to be inspected individually to complete the inspection process. To address the complexity of the airfoil bushing 40 inspection process, this invention provides an airfoil bushing 40 inspection system and method.

[0046] Example 1:

[0047] This embodiment provides a detection system for an airfoil bushing 40. In this embodiment, such as... Figure 1 As shown, an airfoil bushing 40 detection system includes a base assembly 10, a positioning assembly 20, a detection assembly 30, and an airfoil bushing 40.

[0048] Positioning component 20 is slidably connected to base component 10;

[0049] The detection assembly 30 includes a detection seat 31, a first detection unit 32, and a second detection unit 33; the detection seat 31 is connected to the base assembly 10; the first detection unit 32 is located in a groove in the detection seat 31, such as... Figure 3 As shown, the first detection unit 32 is recessed from right to left, that is, it is recessed from the side of the detection seat 31 near the positioning component 20 toward the direction away from the positioning component 20; the second detection unit 33 is connected to the detection seat 31.

[0050] The airfoil bushing 40 includes a bushing body 41, a first airfoil 42, a first hole 43, and a locating key 46. The bushing body 41 is configured as a tube closed at one end and open at the other end to form an inner hole, and is fitted onto the journal of the cross shaft. The first airfoil 42 and the locating key 46 are respectively connected to the outer peripheral wall of the bushing body 41 along the circumference of the bushing body 41. The first hole 43 penetrates the first airfoil 42. In this way, the airfoil bushing 40 can be assembled with the airfoil bearing seat through the first hole 43 and the locating key 46, thus completing the installation of the airfoil bushing 40.

[0051] The airfoil bushing 40 detection system also includes a detection state; the detection state includes the bushing body 41 being fitted onto the positioning component 20, with the bottom surface of the bushing body 41 abutting against the top surface of the positioning component 20. For example... Figure 1 As shown, after the positioning component 20 slides a certain distance from left to right along the base component 10, the side wall of the positioning key 46 enters the space surrounded by the side wall of the first detection unit 32, and the inner peripheral wall of the first hole 43 abuts against the outer peripheral wall of the second detection unit 33. In this way, the dimensions of the positioning key 46 and the first hole 43 of the airfoil bushing 40 can be detected in a single detection step. By detecting the dimensions of the positioning key 46 and the first hole 43, the following detection indicators of the airfoil bushing 40 can be detected, including but not limited to: the inner diameter of the bushing body 41; the width of the positioning key 46; the left-right symmetry of the positioning key 46 along the central axis of the bushing body 41; and the diameter of the first hole 43.

[0052] Preferably, the connection between the detection seat 31 and the base assembly 10 can be configured as an integral molding, which makes the connection between the detection seat 31 and the base assembly 10 more secure and reduces the processing difficulty.

[0053] Furthermore, such as Figure 3As shown, the first detection unit 32 includes a through detection window 321 and a stop detection window 322; the through detection window 321 and the stop detection window 322 are arranged sequentially along a first direction; the through detection window 321 and the stop detection window 322 are respectively in the grooves of the detection seat 31; the projection area of ​​the through detection window 321 along the first direction is greater than or equal to the projection area of ​​the positioning key 46 towards the through detection window 321; the projection area of ​​the stop detection window 322 along the first direction is within the projection area of ​​the through detection window 321 along the first direction; the projection area of ​​the stop detection window 322 along the first direction is less than the projection area of ​​the positioning key 46 towards the through detection window 321; wherein, the first direction is the direction from the positioning component 20 to the detection seat 31;

[0054] The airfoil bushing 40 inspection system also includes a qualified inspection state; the qualified inspection state includes the sidewall of the positioning key 46 abutting against the sidewall of the through inspection window 321, thus ensuring that the size of the positioning key 46 is within the qualified standard range. One end of the positioning key 46 along the first direction abuts against the stop inspection window 322, so that when the positioning component 20 slides along the first direction, it can be blocked and stopped by the stop inspection window 322, completing the inspection of the positioning key 46, and the inspection result is qualified.

[0055] When the shaft head moves along the first direction, if the positioning key 46 abuts against the detection seat 31 but fails to enter the through detection window 321, it indicates that the positioning key 46 is too large and / or its form and position tolerance is too large, and the test result is unqualified. If the positioning key 46 can smoothly enter the through detection window 321 and continue to move through the stop detection window 322, it indicates that the positioning key 46 is too small, and the test result is unqualified.

[0056] Furthermore, such as Figure 3 As shown, the second detection unit 33 includes a detection rod body 334, a second guide part 336, a detection rod handle 331, a detection guide rod 332, and a second guide rail 333. The detection rod body 334, the detection guide rod 332, and the detection rod handle 331 are connected in sequence. The second guide rail 333 passes vertically through the detection seat 31. The detection guide rod 332 passes through the second guide rail 333 and abuts against the second guide rail 333, that is, the detection guide rod 332 passes through the detection seat 31. The detection rod handle 331 is located on the side of the detection seat 31 away from the positioning component 20. The outer diameter of the detection rod handle 331 is larger than that of the detection guide rod 332, and the outer diameter of the detection guide rod 332 is equal to that of the detection rod. One end of the detection rod 334 is connected to the detection guide rod 332 that passes through the detection seat 31, and the other end extends toward the positioning component 20; the outer diameter of the end of the detection rod 334 near the positioning component 20 gradually decreases along the second direction to form a second guide portion 336; wherein, the second direction is the direction from the detection seat 31 to the positioning component 20; in this way, the second detection component 30 can be installed on the detection seat 31.

[0057] The detection state also includes the inner peripheral wall of the first hole 43 passing through the second guide part 336 and abutting against the outer peripheral wall of the detection rod 334.

[0058] Since the outer diameter of the second guide portion 336 gradually decreases along the second direction, when the coaxiality between the first hole 43 and the detection rod 334 is low, the inner peripheral wall of the first hole 43 can abut against the second guide portion 336 and the outer peripheral wall of the detection rod 334 in sequence. Thus, the second guide portion 336 guides the first hole 43 to the outer peripheral side of the detection rod 334, thereby completing the detection of the diameter, coaxiality, and height from the bottom surface of the bushing 41 of the second hole 45.

[0059] Furthermore, such as Figure 3 As shown, the second detection unit 33 also includes a first guide portion 335. The outer diameter of the detection rod 334 near the positioning assembly 20 gradually decreases along the second direction to form the first guide portion 335 and the second guide portion 336; the first guide portion 335 is disposed on the side of the second guide portion 336 away from the base assembly 10; the minimum outer diameter of the first guide portion 335 is smaller than the minimum outer diameter of the second guide portion 336;

[0060] The detection state also includes the inner peripheral wall of the first hole 43 passing through the first guide part 335 and the second guide part 336, and abutting against the outer peripheral wall of the detection rod 334.

[0061] refer to Figure 1 and Figure 3 If the minimum outer diameter of the first guide portion 335 is large, it may easily lift the bushing 41 upwards when entering the inner peripheral wall of the first hole 43, causing the bottom surface of the bushing 41 to detach from the positioning component 20. This would prevent the positioning component from providing a positioning reference for the bottom surface of the bushing 41, making it impossible to detect the height difference between the bottom surface of the bushing 41 and the first hole 43. Therefore, the minimum outer diameter of the first guide portion 335 is set to be small, and this allows the first guide portion 335 to be used to measure the form and position tolerances of the first hole 43. On the other hand, the minimum outer diameter of the second guide portion 336 is set to be large. When the detection rod 334 enters the first hole 43, because the second guide portion 336 is located on the side of the detection rod 334 closest to the base component 10, the inner peripheral wall of the first hole 43 will be subjected to a downward resisting force from the second guide portion 336, preventing the second guide portion 336 from lifting the bushing 41.

[0062] Furthermore, such as Figure 2As shown, the positioning assembly 20 includes a positioning seat 21, a positioning platform 22, a positioning post 23, and a guide block 24. The positioning seat 21, positioning platform 22, and positioning post 23 are connected sequentially. The positioning seat 21 is slidably connected to the base assembly 10. The positioning seat 21 moves axially along the second detection unit 33. The diameter of the positioning platform 22 is larger than the inner diameter of the bushing body 41, thus providing support for the bushing body 41 and providing a positioning reference for measuring the height of the first hole 43 from the bottom surface of the bushing body 41. The difference between the inner diameter of the bushing body 41 and the outer diameter of the positioning post 23 is less than a first set value. This first set value is very small, thus enabling the detection of the inner diameter of the bushing body 41 and ensuring the positioning accuracy of the bushing body 41 fitted onto the outer circumference of the positioning post 23, thereby ensuring the detection accuracy of other dimensions of the bushing body 41. The first set value can be 0.07mm, 0.08mm, or 0.09mm, preferably 0.08mm.

[0063] The guide block 24 is connected to the positioning seat 21 on the side near the positioning stage 22; the distance between the guide block 24 and the second detection unit 33 along the first direction gradually increases along the third direction to form an inclined surface; wherein, the third direction is the direction from bottom to top as shown in the figure.

[0064] The detection state also includes the bushing 41 being fitted onto the outer circumferential surface of the positioning post 23, with the bushing 41 abutting against the side of the positioning platform 22 near the positioning post 23. During the fitting of the bushing 41 onto the outer circumferential surface of the positioning post 23, the inclined surface of the guide block 24 abuts against the first wing 42. This allows the bushing 41 to rotate around its own central axis through the guiding action of the guide block 24, ensuring that the minimum angle between the central axis of the first hole 43 and the central axis of the second detection unit 33 is less than or equal to a second preset value. This allows the first hole 43 to smoothly abut against the outer circumferential wall of the detection rod 334, completing the detection of the hole diameter and other dimensions of the first hole 43. The second preset value can be 1°, 2°, or 3°, preferably 2°.

[0065] Furthermore, such as Figure 1 As shown, the airfoil bushing 40 also includes a second airfoil 44 and a second hole 45. The second airfoil 44 and the locating key 46 are respectively connected to the outer peripheral wall of the bushing body 41 along the circumference of the bushing body 41; the second airfoil 44 is spaced apart from the first airfoil 42; the first hole 43 penetrates the first airfoil 42; the central axis of the first hole 43 is parallel to the central axis of the second hole 45.

[0066] The detection assembly 30 includes two second detection units 33; the detection state also includes the inner peripheral wall of the second hole 45 abutting against the outer peripheral wall of the second detection unit 33. This allows the positioning seat 21 to move a certain distance in the first direction, so that the inner peripheral walls of the first hole 43 and the second hole 45 respectively abut against the outer peripheral walls of the detection rods 334 of the two second detection units 33, thereby completing the detection of the hole diameter of the first hole 43 and the second hole 45 and the detection of their form and position tolerances on the bushing body 41.

[0067] Furthermore, the tolerance range between the base assembly 10, positioning assembly 20, detection seat 31, first detection unit 32, and second detection unit 33 is smaller than the tolerance range between the bushing body 41, first wing body 42, first hole 43, and positioning key 46. This ensures that the tolerance range between each component of the airfoil bushing 40 detection system is smaller than the tolerance range between different parts of the airfoil bushing 40, thereby guaranteeing the reliability of the detection.

[0068] In this embodiment, the inspection items for the airfoil bushing 40 include, but are not limited to: the inner diameter of the bushing body 41; the tolerance of the locating pin diameter should be less than the tolerance of the inner diameter of the bushing body 41; the width of the locating key 46; the left-right symmetry of the locating key 46 along the central axis of the bushing; the height difference between the first hole 43 and the second hole 45 and the bottom surface of the bushing body 41; the left-right symmetry of the first hole 43 and the second hole 45 along the central axis of the bushing; the diameter of the first hole 43 and the second hole 45; the distance from the first hole 43 and the second hole 45 to the central axis of the bushing body 41; and the distance from the inner bottom surface of the bushing body 41 to the bottom surface of the bushing body 41.

[0069] Example 2:

[0070] This embodiment provides a method for detecting an airfoil bushing 40. This method is applied to the airfoil bushing 40 detection system described in Embodiment 1 above. Figure 4 As shown, the detection method for the airfoil bushing 40 includes steps S10-S30, which are explained in detail below:

[0071] Step S10: Based on the detection command trigger, the bushing 41 is fitted onto the outer periphery of the positioning component 20;

[0072] Step S20: The positioning component 20 moves toward the first detection unit 32; in this way, the bushing 41 can be pushed along the base component 10 toward the first detection unit 32 by the positioning component 20, so that after moving a certain distance, the side wall of the positioning key 46 enters the space surrounded by the side wall of the first detection unit 32.

[0073] Step S30: Based on the sidewall of the positioning key 46, the space enclosed by the sidewall of the first detection unit 32 is entered to complete the detection of the positioning key 46. Simultaneously, the inner peripheral wall of the first hole 43 abuts against the outer peripheral wall of the second detection unit 33 to complete the detection of the first hole 43, thus completing the detection of the bushing body 41. In this way, after the positioning component 20 moves only once towards the first detection unit 32, the dimensions of the positioning key 46 and the first hole 43 of the airfoil bushing 40 are detected, thereby completing the detection of multiple dimensional indicators of the bushing body 41.

[0074] Furthermore, step S20 includes steps S21-S22. Steps S10, S21, S22, and S30 are executed sequentially. Steps S21-S22 are explained in detail below:

[0075] Step S21: The positioning component 20 moves towards the first detection unit 32 and enters the first hole 43 through the outer peripheral wall of the second detection unit 33; the detection of the first hole 43 is completed.

[0076] Step S22: The positioning component 20 continues to move towards the first detection unit 32 until it enters the space surrounded by the side wall of the first detection unit 32; thus completing the detection of the positioning key 46.

[0077] When the distance between the first hole 43 and the second detection unit 33 is less than the distance between the positioning key 46 and the first detection unit 32; that is, when the detection length of the first hole 43 of the bushing body 41 is less than the detection length of the positioning key 46, the detection of the first hole 43 can be completed first, and then the detection of the positioning key 46 can be completed.

[0078] Furthermore, the second detection unit 33 includes a detection rod 334, a second guide portion 336, and a first guide portion 335; one end of the detection rod 334 is connected to the detection seat 31, and the other end extends toward the positioning component 20; the outer diameter of the end of the detection rod 334 near the positioning component 20 gradually decreases along a second direction to form the first guide portion 335 and the second guide portion 336; the first guide portion 335 is disposed on the side of the second guide portion 336 away from the positioning component 20; the minimum outer diameter of the first guide portion 335 is smaller than the minimum outer diameter of the second guide portion 336; wherein, the second direction is the direction from the detection seat 31 to the positioning component 20;

[0079] Step S22 includes steps S221-S223. Steps S10, S21, S221-S223, and S30 are executed sequentially. The specific explanations of steps S221-S223 are as follows:

[0080] Step S221: The positioning component 20 moves toward the first detection unit 32 and enters the first guide part 335 into the first hole 43;

[0081] Step S222: The positioning component 20 continues to move toward the first detection unit 32 until it enters the first hole 43 through the second guide part 336;

[0082] Step S223: The positioning component 20 continues to move toward the first detection unit 32 until the detection rod 334 enters the inner peripheral wall of the first hole 43, thereby completing the detection of the first hole 43.

[0083] In this way, the form and position tolerance of the first hole 43 can be detected first by the first guide part 335 with the smallest outer diameter, and then the first hole 43 can be guided by the second guide part 336 to abut against the second detection unit 33, thereby completing the detection of the inner diameter of the first hole 43.

[0084] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A system for detecting airfoil bushings, characterized in that, The airfoil bushing detection system includes: Base assembly; A positioning component, wherein the positioning component is slidably connected to the base component; The detection assembly includes a detection seat, a first detection unit, and a second detection unit; the detection seat is connected to the base assembly; the first detection unit is a groove in the detection seat; and the second detection unit is connected to the detection seat. An airfoil bushing includes a bushing body, a first airfoil, a first hole, and a locating key; the bushing body is configured as a tube closed at one end; the first airfoil and the locating key are respectively connected to the outer peripheral wall of the bushing body along the circumference of the bushing body; the first hole penetrates the first airfoil; The first detection unit includes a pass detection window and a stop detection window; the pass detection window and the stop detection window are arranged sequentially along a first direction; the pass detection window and the stop detection window are respectively in the grooves of the detection seat; the projection area of ​​the pass detection window along the first direction is greater than or equal to the projection area of ​​the positioning key towards the pass detection window; the projection area of ​​the stop detection window along the first direction is within the projection area of ​​the pass detection window along the first direction; the projection area of ​​the stop detection window along the first direction is less than the projection area of ​​the positioning key towards the pass detection window; wherein, the first direction is the direction from the positioning component to the detection seat. The positioning component includes a positioning seat, a positioning platform, a positioning post, and a guide block; the positioning seat, the positioning platform, and the positioning post are connected in sequence; the positioning seat is slidably connected to the base assembly; the positioning seat moves along the axial direction of the second detection unit; the diameter of the positioning platform is greater than the inner diameter of the bushing body; the difference between the inner diameter of the bushing body and the outer diameter of the positioning post is less than a first set value. The guide block is connected to the positioning seat on the side near the positioning platform; the distance between the guide block and the second detection unit along the first direction gradually increases along the third direction to form an inclined surface; The airfoil bushing detection system includes a detection state; the detection state includes the bushing body being fitted onto the positioning component, the bottom surface of the bushing body abutting against the top surface of the positioning component, the sidewall of the positioning key entering the space surrounded by the sidewall of the first detection unit, and the inner peripheral wall of the first hole abutting against the outer peripheral wall of the second detection unit. The detection state also includes the bushing being fitted onto the outer circumferential surface of the positioning post, with the bushing abutting against the side of the positioning platform near the positioning post; wherein, during the process of the bushing being fitted onto the outer circumferential surface of the positioning post, the inclined surface of the guide block abuts against the first wing, such that the minimum included angle between the central axis of the first hole and the central axis of the second detection unit is less than or equal to a second set value.

2. The airfoil bushing detection system according to claim 1, characterized in that, The airfoil bushing detection system also includes a qualified detection state; the qualified detection state includes the sidewall of the positioning key abutting against the sidewall of the through detection window, and one end of the positioning key along the first direction abutting against the stop detection window.

3. The airfoil bushing detection system according to claim 1, characterized in that, The second detection unit includes a detection rod and a second guide portion; one end of the detection rod is connected to the detection seat, and the other end extends toward the positioning component; the outer diameter of the end of the detection rod near the positioning component gradually decreases along a second direction to form the second guide portion; wherein, the second direction is the direction from the detection seat to the positioning component; The detection state also includes the inner peripheral wall of the first hole being sleeved through the second guide portion and abutting against the outer peripheral wall of the detection rod.

4. The airfoil bushing detection system according to claim 3, characterized in that, The second detection unit further includes a first guide portion; the outer diameter of the detection rod near the positioning component gradually decreases along the second direction to form the first guide portion and the second guide portion; the first guide portion is disposed on the side of the second guide portion away from the base component; the minimum outer diameter of the first guide portion is smaller than the minimum outer diameter of the second guide portion; The detection state also includes the inner peripheral wall of the first hole being sleeved through the first guide part and the second guide part, and abutting against the outer peripheral wall of the detection rod.

5. The airfoil bushing detection system according to claim 1, characterized in that, The airfoil bushing further includes a second airfoil and a second hole; the second airfoil and the positioning key are respectively connected to the outer peripheral wall of the bushing body along the circumferential direction of the bushing body; the second airfoil is spaced apart from the first airfoil; the second hole penetrates the second airfoil; the central axis of the first hole is parallel to the central axis of the second hole. The detection component includes two second detection units; The detection state also includes the inner peripheral wall of the second hole abutting against the outer peripheral wall of the second detection unit.

6. The airfoil bushing detection system according to claim 1, characterized in that, The tolerance range between the base assembly, the positioning assembly, the detection seat, the first detection unit, and the second detection unit is smaller than the tolerance range between the bushing body, the first wing body, the first hole, and the positioning key.

7. A method for detecting airfoil bushings, characterized in that, The airfoil bushing detection method is applied to an airfoil bushing detection system according to any one of claims 1 to 6, and the airfoil bushing detection method includes: Triggered by a detection command, the bushing is placed on the outer periphery of the positioning component; The positioning component moves toward the first detection unit; The first detection unit's sidewall surrounds the space formed by the positioning key's sidewall, and the inner peripheral wall of the first hole abuts against the outer peripheral wall of the second detection unit, thus completing the detection.

8. The airfoil bushing detection method according to claim 7, characterized in that, The movement of the positioning component toward the first detection unit includes: The positioning component moves toward the first detection unit and enters the first hole from the outer peripheral wall of the second detection unit; The positioning component continues to move toward the first detection unit until it enters the space surrounded by the side wall of the first detection unit.

9. The airfoil bushing detection method according to claim 8, characterized in that, The second detection unit includes a detection rod, a second guide portion, and a first guide portion; one end of the detection rod is connected to the detection seat, and the other end extends towards the positioning component; the outer diameter of the end of the detection rod near the positioning component gradually decreases along a second direction to form the first guide portion and the second guide portion; the first guide portion is disposed on the side of the second guide portion away from the positioning component; the minimum outer diameter of the first guide portion is smaller than the minimum outer diameter of the second guide portion; wherein, the second direction is the direction from the detection seat to the positioning component; The positioning component continues to move towards the first detection unit until it enters the space surrounded by the side wall of the first detection unit, including: The positioning component moves toward the first detection unit until it enters the first hole through the first guide portion; The positioning component continues to move toward the first detection unit until it enters the first hole through the second guide portion; The positioning component continues to move toward the first detection unit until the detection rod enters the inner peripheral wall of the first hole.

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