Helical tooth detection mechanism and detection method

Abstract

The invention relates to a helical tooth detection mechanism and a detection method. The helical tooth detection mechanism comprises a base; the ring go gauge is connected to the base through a reference seat, the reference seat can move relative to the base in the axial direction of the ring go gauge, the ring go gauge can move relative to the reference seat in the axial direction of the ring go gauge and rotate relative to the reference seat around the axis of the ring go gauge, and an elastic piece and a driving assembly are arranged between the ring go gauge and the reference seat. The ring go gauge overcomes the elastic force of the elastic piece when moving relative to the reference base in the axial direction of the ring go gauge. The driving assembly is used for driving the ring go gauge to rotate relative to the reference base. And the detection assembly is arranged between the reference seat and the ring go gauge, and the detection assembly is used for detecting the axial displacement and the rotation angle of the ring go gauge relative to the reference seat. According to the invention, the detection of the helical tooth size of a part can be completed through one-time reciprocating stroke of the ring go gauge, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of helical gear detection, and in particular to a helical gear detection mechanism and a detection method. Background Art

[0002] Helical teeth processed on parts are generally used to transmit torque. Parts in precision transmission structures have high requirements for the accuracy of helical teeth. Therefore, after the parts are processed, the helical teeth of the parts need to be inspected to screen out unqualified parts.

[0003] Currently, there are two main methods for inspecting helical teeth on parts: visual inspection and go / no-go inspection. Visual inspection captures an image of the helical teeth and uses software to analyze the parameters to determine if they are qualified. This method is highly efficient, but also expensive and susceptible to environmental interference. Go / no-go inspection uses both a go gauge and a no-go gauge, requiring two inspection steps and resulting in lower efficiency. Summary of the Invention

[0004] Based on the above description, the present invention provides a helical gear detection mechanism and detection method to solve the problem in the related art that the go / no-go gauge detection requires two detection processes and is inefficient.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: In the first aspect, the present application provides a helical gear detection mechanism, the technical solution adopted is as follows: A helical gear detection mechanism, comprising: base; A ring gauge is connected to the base via a reference seat. The reference seat can move relative to the base along the axial direction of the ring gauge. The ring gauge can move relative to the reference seat along its own axial direction and rotate relative to the reference seat around its own axis. An elastic member and a drive assembly are provided between the ring gauge and the reference seat. When the ring gauge moves relative to the reference seat along its own axial direction, it overcomes the elastic force of the elastic member. The drive assembly is used to drive the ring gauge to rotate relative to the reference seat. A detection assembly is provided between the reference seat and the ring gauge, and is used to detect the axial displacement and rotation angle of the ring gauge relative to the reference seat; Among them, it is suitable to move the reference seat from the set stroke position to the starting position when the reference seat moves from the starting position to the set stroke position relative to the base, and the displacement of the ring gauge relative to the reference seat is within the standard range, and compare the angle of rotation of the ring gauge relative to the reference seat during the process of moving the reference seat from the set stroke position to the starting position with the standard value to determine whether the helical teeth of the part are too small.

[0006] Preferably, the driving assembly includes a driving wheel and a driven wheel with parallel axes, the driven wheel is coaxially fixed with the ring gauge, the driving wheel is rotatably connected to the reference seat, and the side wall of the driving wheel is in contact with the side wall of the driven wheel, suitable for driving the driven wheel to rotate by friction when the driving wheel rotates.

[0007] Preferably, the ring gauge includes an initial position and an end position relative to the reference seat in the axial direction, and the distribution direction of the starting position and the set stroke position of the reference seat relative to the base is opposite to the distribution direction of the initial position and the end position of the ring gauge relative to the reference seat. When the elastic member is not deformed by force, the ring gauge is in the initial position relative to the reference seat.

[0008] Preferably, the detection component includes an encoder and a transmission structure, the encoder is connected to the reference seat and the axis of the rotating shaft is parallel to the axis of the ring gauge, the transmission structure connects the ring gauge and the rotating shaft of the encoder, and when the ring gauge rotates relative to the reference seat, the rotating shaft of the encoder is driven to rotate through the transmission structure.

[0009] Preferably, the transmission structure includes a gear transmission structure.

[0010] Preferably, the detection component further comprises a laser displacement sensor connected to the reference seat, and the laser displacement sensor is used to detect the distance between the laser displacement sensor and the ring gauge in the axial direction of the ring gauge.

[0011] In a second aspect, the present application provides a helical gear detection method, which uses the helical gear detection mechanism described above for detection, including: Place the part to be tested in the testing position in a coaxial position with the ring gauge; The reference seat moves from the starting position to the set stroke position, and the ring gauge is driven to rotate by the driving assembly during the process; When the reference seat moves to the set stroke position, the displacement of the ring gauge relative to the reference seat in the axial direction is compared with the standard data to determine whether the helical teeth of the measured part are too large; If the axial displacement of the ring gauge relative to the reference seat is within the standard range, the reference seat is moved from the set stroke position to the starting position. The angle of rotation of the ring gauge relative to the reference seat during the movement of the reference seat from the set stroke position to the starting position is compared with the standard value to determine whether the helical teeth of the part are too small. Preferably, before moving the reference seat from the set stroke position to the starting position, the process includes: rotating the driving wheel in a set direction by a set angle, and the ring gauge is driven to rotate in a direction opposite to the direction of rotation of the helical teeth of the measured part located at the detection position.

[0012] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects: The helical gear detection mechanism of the present application is provided with a ring gauge and a detection assembly. When testing, the part is placed in the detection position in a posture coaxial with the ring gauge and with the helical gear section facing the ring gauge. When setting the detection position, the reference seat is moved from the starting position to the set stroke position. The ring gauge moves with the reference seat and is inserted into the helical gear of the standard part located in the detection position, and can be completely inserted into place. When testing the tested part, the reference seat is located in the starting position, the tested part is fixedly placed in the detection position, and the reference seat is moved from the starting position to the set stroke position. During the process, the driving assembly drives the ring gauge to rotate to ensure that the tooth grooves of the ring gauge are aligned with the helical gear so that the tested part can be smoothly inserted. When the design is made, when the reference seat has not yet moved to the set stroke position, the ring gauge is inserted into the standard part and is in place. The ring gauge is prevented from continuing to move with the reference seat. When the reference seat continues to move, the ring gauge and the reference seat undergo relative displacement. When the reference seat moves to the set stroke position, the displacement of the ring gauge relative to the reference seat is used as the standard value, and an appropriate range is taken as the standard range. If the helical teeth of the part being measured are too large, the go-gauge cannot be fully inserted into place. When the base moves to the set stroke position, the displacement of the go-gauge relative to the base detected by the detection component exceeds the standard range, and the helical teeth are judged to be too large. If the helical teeth of the part being measured are not too large, the go-gauge can be fully inserted into place. When the base moves to the set stroke position, the displacement of the go-gauge relative to the base detected by the detection component is within the standard range. At this time, it is necessary to determine whether the helical teeth are too small. The method to determine if they are too small is to reset the base to the starting position and compare the angle of rotation of the go-gauge relative to the base during the resetting process of the base with the standard value to determine whether the helical teeth of the part are too small. During the reset process of the datum seat, the go-gauge moves from the position when it is fully inserted into the bevel tooth segment to the position when it is separated from the part being measured as the datum seat moves. From the position when the go-gauge is fully inserted into the bevel tooth segment to the position when the bevel tooth surface and the go-gauge tooth surface contact each other, no rotation occurs. This section of travel is recorded as the idle travel. After that, when the go-gauge continues to move axially with the datum seat relative to the part, under the action of the bevel teeth, the go-gauge will rotate relative to the connection being measured until it is separated from the part. This section is the rotational travel. During the design process, the go-gauge is moved from the position when the bevel tooth segment is fully inserted into the standard part to the rotation angle when it is separated from the part being measured. That is, the rotation angle of the go-gauge relative to the datum seat during the reset process of the datum seat is used as the standard value, and an appropriate standard range is set. For parts with normal bevel teeth, the axial clearance between the bevel tooth surface and the go-gauge tooth surface is small, so the idle travel is small and the rotational travel is large. The go-gauge moves from the position when it is fully inserted into the bevel tooth segment to the rotation angle when it is separated from the part being measured. That is, the rotation angle of the go-gauge relative to the datum seat during the reset process of the datum seat is within the acceptable range. For parts with smaller helical teeth, the axial clearance between the tooth surfaces of the helical teeth and the tooth surfaces of the ring gauge is larger, so the idle stroke is larger and the rotation stroke is smaller. The measured part moves from the position when it is fully inserted into the helical tooth segment to the rotation angle when it is separated from the measured part, that is, the rotation angle of the ring gauge relative to the reference seat during the resetting process of the reference seat is larger.By comparing the measured rotation angle of the ring gauge relative to the reference base during the reset process with the standard value, it can be determined whether the helical teeth of the tested part are too small. As a result, the size of the part's helical teeth can be tested with a single reciprocating stroke of the ring gauge, greatly improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the structure of the part to be tested in an embodiment of the present invention; Figure 2 A schematic structural diagram of a helical gear detection mechanism according to an embodiment of the present invention, wherein the reference seat is located at a starting position relative to the base, and the ring gauge is located at an initial position relative to the reference seat; Figure 3 A partially enlarged schematic diagram of a helical gear detection mechanism provided by an embodiment of the present invention; Figure 4 A schematic diagram of the cooperation between the helical gear detection mechanism and the part to be tested provided by an embodiment of the present invention, wherein the reference seat is located at a set stroke position relative to the base, and the ring gauge is located at an end position relative to the reference seat; Figure 5 Schematic diagram of the helical tooth rotation direction in an embodiment of the present invention.

[0014] Description of reference numerals: 1. Base; 2. Ring gauge; 3. Reference seat; 4. Elastic part; 5. Drive assembly; 51. Drive wheel; 52. Driven wheel; 53. Motor; 6. Connecting seat; 61. Mounting plate; 62. Reference surface; 7. Slide cylinder; 8. Encoder; 9. Transmission structure; 10. Laser displacement sensor. DETAILED DESCRIPTION

[0015] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0017] It will be understood that spatial relational terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be understood that in addition to the orientations shown in the figures, spatial relational terms also include different orientations of the device in use and operation. For example, if the device in the drawings is turned over, the element or feature described as "under" or "beneath" or "beneath" the other elements will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include alternative orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0018] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection" should be understood as "electrical connection", "communication connection", etc., if the connected circuits, modules, units, etc. can transmit electrical signals or data to each other.

[0019] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0020] Figure 1 The part to be tested in this embodiment has an outer diameter of the helical tooth section of the part, and one end of the tooth groove between the helical teeth is connected to the other end surface of the plane perpendicular to the axis of the part.

[0021] Reference Figure 2 As shown, an embodiment of the present application provides a helical gear detection mechanism, comprising a base 1, a ring gauge 2, a reference seat 3, and a detection assembly. The reference seat 3 is connected to the base 1, and the ring gauge 2 is connected to the reference seat 3. The reference seat 3 can move relative to the base 1 along the axial direction of the ring gauge 2. The ring gauge 2 can move relative to the reference seat 3 along its own axial direction and rotate relative to the reference seat 3 around its own axis. An elastic member 4 and a drive assembly 5 are provided between the ring gauge 2 and the reference seat 3. When the ring gauge 2 moves relative to the reference seat 3 along its own axial direction, it overcomes the elastic force of the elastic member 4. The drive assembly 5 is used to drive the ring gauge 2 to rotate relative to the reference seat 3. The detection assembly is provided between the reference seat 3 and the ring gauge 2. The detection assembly is used to detect the axial displacement and rotation angle of the ring gauge 2 relative to the reference seat 3.

[0022] Reference Figure 2 As shown, during testing, the part is placed in the testing position in a posture where it is coaxial with the ring gauge 2 and the bevel tooth segment faces the ring gauge 2, and when setting the testing position, the reference seat 3 is moved from the starting position to the set stroke position, and the ring gauge 2 moves with the reference seat 3 and is inserted into the bevel teeth of the standard part located at the testing position, and can be completely inserted into place until it abuts against the end face of the tooth groove.

[0023] When inspecting the part to be tested, the reference seat 3 is located at the starting position, and the part to be tested is fixed in the inspection position. The reference seat 3 moves from the starting position to the set stroke position. During this process, the drive assembly 5 drives the ring gauge 2 to rotate to ensure that the tooth grooves of the ring gauge 2 are aligned with the bevel teeth so that the part to be tested can be smoothly put on. When designed, the ring gauge 2 is inserted into the standard part before the reference seat 3 moves to the set stroke position. The ring gauge 2 is prevented from continuing to move with the reference seat 3. When the reference seat 3 continues to move, the ring gauge 2 and the reference seat 3 are relatively displaced. When the reference seat 3 moves to the set stroke position, the displacement of the ring gauge 2 relative to the reference seat 3 is used as the standard value, and an appropriate range is taken as the standard range.

[0024] If the bevel teeth of the part being measured are too large, the go-ring gauge 2 cannot be fully inserted into place. When the reference base 3 moves to the set stroke position, the displacement of the go-ring gauge 2 relative to the reference base 3 detected by the detection component exceeds the standard range, and the bevel teeth are judged to be too large. If the bevel teeth of the part being measured are not too large, the go-ring gauge 2 can be fully inserted into place. When the reference base 3 moves to the set stroke position, the displacement of the go-ring gauge 2 relative to the reference base 3 detected by the detection component is within the standard range. In this case, it is necessary to determine whether the bevel teeth are too small.

[0025] The method for judging whether it is too small is to reset the reference seat 3 to the starting position, and compare the angle of rotation of the ring gauge 2 relative to the reference seat 3 during the resetting process of the reference seat 3 with the standard value to judge whether the helical teeth of the part are too small.

[0026] Specifically, during the resetting process of the reference seat 3, the ring gauge 2 moves from the position when it is fully inserted into the bevel tooth segment to the position when it is separated from the part being measured along with the reference seat 3. The ring gauge 2 moves axially relative to the part from the position when it is fully inserted into the bevel tooth segment to the position when the bevel tooth surface and the tooth surface of the ring gauge 2 come into contact without rotating. This section of travel is recorded as an empty travel. Afterwards, when the ring gauge 2 continues to move axially relative to the part with the reference seat 3, it will rotate relative to the connection being measured under the action of the bevel teeth until it is separated from the part. This section is formed as the rotation travel. During the design, the position when the ring gauge 2 is fully inserted into the bevel tooth segment of the standard part is moved to the rotation angle when it is separated from the part being measured, that is, the rotation angle of the ring gauge 2 relative to the reference seat 3 during the resetting process of the reference seat 3 is used as the standard value, and an appropriate standard range is set.

[0027] For parts whose helical teeth are not too small, the axial clearance between the tooth surface of the helical teeth and the tooth surface of the ring gauge 2 is too small, so the idle stroke is small and the rotation stroke is large. The ring gauge 2 moves from the position when it is fully inserted into the helical tooth segment to the rotation angle when it is separated from the part being measured, that is, the rotation angle of the ring gauge 2 relative to the reference seat 3 during the resetting process of the reference seat 3 is within the qualified range. For parts whose helical teeth are too small, the axial clearance between the tooth surface of the helical teeth and the tooth surface of the ring gauge 2 is too large, so the idle stroke is too large and the rotation stroke is too small. The ring gauge 2 moves from the position when it is fully inserted into the helical tooth segment to the rotation angle when it is separated from the part being measured, that is, the rotation angle of the ring gauge 2 relative to the reference seat 3 during the resetting process of the reference seat 3 is too large. By comparing the measured rotation angle of the ring gauge 2 relative to the reference seat 3 during the resetting process of the reference seat 3 with the standard value, it is possible to determine whether the helical teeth of the part being measured are too small. Therefore, the size of the helical teeth of the part can be detected by a single reciprocating stroke of the ring gauge 2, greatly improving the detection efficiency.

[0028] Reference Figure 2-3 As shown, specifically, the ring gauge 2 is connected to the reference base 3 via a connecting seat 6. The ring gauge 2 is connected to the connecting seat 6 and can rotate relative to the connecting seat 6 around its own axis. The connecting seat 6 can move relative to the reference base 3 along the axial direction of the ring gauge 2. The reference base 3 is mounted on the base 1 via a slide cylinder 7, so that the slide cylinder 7 drives the reference base 3 to move relative to the base 1, and the connecting seat 6 is mounted on the reference base 3 via a guide rail slider mechanism.

[0029] Reference Figure 3 As shown, the connecting seat 6 includes a mounting plate 61 perpendicular to the axis of the ring gauge 2. The ring gauge 2 is mounted on the mounting plate 61 via a bearing. The mounting plate 61 is provided with a through hole coaxial with the ring gauge 2. The through hole allows the measured part to pass through the ring gauge 2 to ensure that the ring gauge 2 is properly inserted into the measured part. The elastic member 4 is a spring, which is arranged between the reference seat 3 and the connecting seat 6, with its axis parallel to the axis of the ring gauge 2. The two ends of the spring are respectively fixed to the reference seat 3 and the connecting seat 6.

[0030] Reference Figure 3 As shown, a cylinder is provided on the base 1 to drive the reference base 3 to move relative to the base 1 , and the detection action is completed by controlling the movement of the reference base 3 through the cylinder.

[0031] Reference Figure 3 As shown, the detection component includes an encoder 8 and a transmission structure 9. The encoder 8 is connected to the reference seat 3 and the axis of the rotating shaft is parallel to the axis of the ring gauge 2. The transmission structure 9 connects the ring gauge 2 and the rotating shaft of the encoder 8. When the ring gauge 2 rotates relative to the reference seat 3, the rotating shaft of the encoder 8 is driven to rotate through the transmission structure 9.

[0032] Reference Figure 3As shown, specifically, the transmission mechanism can adopt a gear transmission structure 9 or a belt transmission structure 9. In this embodiment, the gear transmission structure 9 specifically includes a driving gear and a driven gear. The driving gear is coaxially arranged around the ring gauge 2 and fixed to the ring gauge 2, and the driven gear is coaxially fixed to the rotating shaft of the encoder 8 and meshes with the driving gear. The encoder 8 is fixed on the connecting seat 6. When the ring gauge 2 rotates, the encoder 8 detects the rotation angle of the ring gauge 2 relative to the connecting seat 6, thereby realizing the detection of the rotation angle of the ring gauge 2. The diameter of the driving gear is further set to be larger than the diameter of the driven gear, thereby amplifying the difference between the rotation angle of the ring gauge 2 and the part, making the angle data detected by the encoder 8 larger, thereby improving the detection accuracy.

[0033] Reference Figure 3 As shown, the detection assembly also includes a laser displacement sensor 10 connected to the reference base 3. The laser displacement sensor 10 is used to detect the distance between the laser displacement sensor 10 and the ring gauge 2 in the axial direction of the ring gauge 2. Specifically, the laser displacement sensor 10 is fixed to the reference base 3, and a reference surface 62 perpendicular to the axis of the ring gauge 2 is provided on the connecting base 6. The laser displacement sensor 10 detects the distance to the reference surface 62, thereby indirectly determining the displacement of the ring gauge 2 relative to the reference base 3.

[0034] Reference Figure 3 As shown, the driving assembly 5 includes a driving wheel 51 and a driven wheel 52 with parallel axes. The driven wheel 52 is coaxially fixed to the ring gauge 2. The driving wheel 51 is rotatably connected to the reference seat 3, and the side wall of the driving wheel 51 is in contact with the side wall of the driven wheel 52. When the driving wheel 51 rotates, the driven wheel 52 is driven to rotate by friction.

[0035] Reference Figure 3 As shown, specifically, the driven wheel 52 is annular and has an inner diameter larger than that of the ring gauge 2. A motor 53 is provided on the connecting base 6 for driving the driving wheel 51 to rotate. The driving wheel 51 is coaxially fixed with the output shaft of the motor 53. When the reference base 3 moves from the starting position to the set stroke position, the motor 53 is activated to rotate the driving wheel 51. The driving wheel 51 drives the driven wheel 52 and the ring gauge 2 to rotate through friction. When the inner tooth end face of the ring gauge 2 and the end face of the bevel teeth abut against each other, the ring gauge 2 can be rotated to align the inner tooth grooves of the ring gauge 2 with the bevel teeth, thereby allowing the tested part to pass through the ring gauge 2 smoothly for inspection.

[0036] Reference Figure 2 and Figure 4As shown, the ring go gauge 2 includes an initial position and an end position relative to the reference seat 3 in the axial direction. The distribution direction of the initial position and the set stroke position of the reference seat 3 relative to the base 1 is opposite to the distribution direction of the initial position and the end position of the ring go gauge 2 relative to the reference seat 3. When the elastic member 4 is not deformed by force, the ring go gauge 2 is in the initial position relative to the reference seat 3. Through this arrangement, when the ring go gauge 2 moves from the initial position to the end position, the direction of the elastic force exerted on the ring go gauge 2 by the elastic deformation of the elastic member 4 is the same as the distribution direction of the initial position and the set stroke position of the reference seat 3 relative to the base 1, that is, the ring go gauge 2 applies a force toward the measured part, thereby ensuring that the ring go gauge 2 can be inserted into the part in place when the helical teeth of the part are not too large.

[0037] Reference Figure 2 and Figure 4 As shown, further, during the design, the reference seat 3 is moved to the set stroke position, and when the ring gauge 2 is fully inserted into the measured part, the reference seat 3 is located at the set stroke position. At this time, the elastic member 4 is in a deformed state and exerts elastic force on the ring gauge 2, so that the tooth end face of the ring gauge 2 is axially abutted against the tooth groove end face of the part, ensuring that the ring gauge 2 is inserted into the measured part in place to ensure the accuracy of the detection result.

[0038] When checking whether the helical teeth are too small, before the reference seat 3 is moved from the set stroke position to the starting position, the driving wheel 51 is rotated in one direction by a set angle, and the ring gauge 2 is driven to rotate in a direction opposite to the helical teeth of the part being tested at the detection position. Figure 5 As shown, the rotation direction of the helical teeth of the measured part is the rotation direction from one end of the helical teeth close to the end face of the helical tooth segment of the measured part to the other end.

[0039] When the go gauge 2 is axially moved away from the part, the tooth surfaces where the inner teeth of the go gauge 2 and the helical teeth of the part being measured are in contact are designated as the contact surfaces, while the tooth surfaces where the inner teeth of the go gauge 2 and the helical teeth of the part being measured are not in contact are designated as the non-contact surfaces. Rotating the go gauge 2 in a direction opposite to the rotational direction of the helical teeth of the part being measured causes the non-contact surfaces of the inner teeth of the go gauge 2 and the helical teeth of the part being measured to abut against each other. Because the axial separation caused by the pressure between the non-contact surfaces is very small, and this axial force component is in the opposite direction to the elastic force exerted by the elastic member 4 on the go gauge 2, when the non-contact surfaces of the go gauge 2 and the part being measured abut against each other, the go gauge 2 will not move axially relative to the part being measured, and the driving wheel 51 continues to rotate, causing slippage between the driven wheel 52.

[0040] This setting allows the go gauge 2 to be fully inserted into the bevel gear segment and positioned so that the axial distance between the contact surface of the go gauge 2 and the part being measured is at its maximum. This ensures that the go gauge 2 has the maximum idle travel when it moves away from the part being measured, thereby eliminating the rotational angle error of the go gauge 2 relative to the reference seat 3 caused by the influence of the circumferential relative position of the go gauge 2 and the part being measured on the actual idle travel. This ensures that each angle test result has the same reference as the standard data, thereby improving the accuracy of the test results.

[0041] This embodiment also provides a helical gear detection method using the above-mentioned helical gear detection mechanism, comprising the following steps: The part to be measured is fixedly placed in the detection position in a coaxial posture with the ring gauge 2, with the bevel tooth section of the part to be measured facing the ring gauge 2. Before placing the part to be measured, the reference seat 3 is reset to the starting position.

[0042] The slide cylinder 7 drives the reference seat 3 to move from the starting position to the set stroke position. During the process, the motor 53 drives the ring gauge 2 to rotate.

[0043] When the reference base 3 moves to the set travel position, the axial displacement of the go-gauge 2 relative to the reference base 3 is compared with the standard data. Specifically, the detection data from the laser displacement sensor 10 at this time is directly compared with the standard data to determine whether the helical teeth of the tested part are too large. If the axial displacement of the go-gauge 2 relative to the reference base 3 is within the standard range, the part's helical teeth are not too large. Otherwise, the part's helical teeth are too large. If the part's helical teeth are too large, the part test is terminated and the reference base 3 is reset to its starting position.

[0044] If the part's helical teeth are not too large, the drive wheel 51 is rotated in the set direction and by the set angle. The ring gauge 2 is driven to rotate in the direction opposite to the direction of rotation of the helical teeth of the part being tested at the detection position. The reference base 3 is then reset from the set stroke position to the starting position. The angle of rotation of the ring gauge 2 relative to the reference base 3 during the reset process is compared with the standard value. That is, the angle data detected by the encoder 8 during this process is compared with the standard data to determine whether the part's helical teeth are too small. If the angle data detected by the encoder 8 is within the standard range, the part's helical teeth are not too small. Otherwise, the part's helical teeth are too small.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A helical gear detection mechanism, characterized in that: include: Base (1); A ring gauge (2) is connected to the base (1) via a reference seat (3); the reference seat (3) can move relative to the base (1) along the axial direction of the ring gauge (2); the ring gauge (2) can move relative to the reference seat (3) along its own axial direction and rotate relative to the reference seat (3) around its own axis; an elastic member (4) and a driving assembly (5) are provided between the ring gauge (2) and the reference seat (3); when the ring gauge (2) moves relative to the reference seat (3) along its own axial direction, it overcomes the elastic force of the elastic member (4); and the driving assembly (5) is used to drive the ring gauge (2) to rotate relative to the reference seat (3); A detection component is provided between the reference seat (3) and the ring gauge (2), and the detection component is used to detect the axial displacement and rotation angle of the ring gauge (2) relative to the reference seat (3); Wherein, it is suitable for moving the reference seat (3) from the set stroke position to the starting position relative to the base (1), and when the displacement of the ring gauge (2) relative to the reference seat (3) is within a standard range, the reference seat (3) is moved from the set stroke position to the starting position, and the angle of rotation of the ring gauge (2) relative to the reference seat (3) during the process of moving the reference seat (3) from the set stroke position to the starting position is compared with the standard value to judge whether the helical teeth of the part are too small.

2. The helical gear detection mechanism according to claim 1, characterized in that: The driving assembly (5) comprises a driving wheel (51) and a driven wheel (52) whose axes are parallel to each other. The driven wheel (52) is coaxially fixed to the ring gauge (2). The driving wheel (51) is rotatably connected to the reference seat (3), and the side wall of the driving wheel (51) contacts the side wall of the driven wheel (52), so as to be suitable for driving the driven wheel (52) to rotate by friction when the driving wheel (51) rotates.

3. The helical gear detection mechanism according to claim 2, characterized in that: The ring gauge (2) includes an initial position and an end position relative to the reference seat (3) in the axial direction. The distribution direction of the starting position and the set stroke position of the reference seat (3) relative to the base (1) is opposite to the distribution direction of the initial position and the end position of the ring gauge (2) relative to the reference seat (3). When the elastic member (4) is not deformed by force, the ring gauge (2) is in the initial position relative to the reference seat (3).

4. The helical gear detection mechanism according to claim 1, characterized in that: The detection component comprises an encoder (8) and a transmission structure (9); the encoder (8) is connected to the reference seat (3) and the axis of the rotating shaft is parallel to the axis of the ring gauge (2); the transmission structure (9) connects the ring gauge (2) and the rotating shaft of the encoder (8); when the ring gauge (2) rotates relative to the reference seat (3), the rotating shaft of the encoder (8) is driven to rotate by the transmission structure (9).

5. The helical gear detection mechanism according to claim 4, characterized in that: The transmission structure (9) comprises a gear transmission structure (9).

6. The helical gear detection mechanism according to claim 1, characterized in that: The detection assembly further comprises a laser displacement sensor (10) connected to the reference seat (3), and the laser displacement sensor (10) is used to detect the distance between the laser displacement sensor (10) and the ring gauge (2) in the axial direction of the ring gauge (2).

7. A method for detecting helical teeth, characterized in that: The detection is performed using the helical gear detection mechanism according to any one of claims 3 to 6, comprising: The part to be tested is fixedly placed at the testing position in a coaxial posture with the ring gauge (2); The reference seat (3) moves from the starting position to the set stroke position, and during the process, the ring gauge (2) is driven to rotate by the driving component (5); When the reference seat (3) moves to a set stroke position, the displacement of the ring gauge (2) relative to the reference seat (3) in the axial direction is compared with standard data to determine whether the helical teeth of the measured part are too large; If the displacement of the ring gauge (2) relative to the reference seat (3) in the axial direction is within the standard range, the reference seat (3) is moved from the set stroke position to the starting position. The angle of rotation of the ring gauge (2) relative to the reference seat (3) during the process of moving the reference seat (3) from the set stroke position to the starting position is compared with the standard value to determine whether the helical teeth of the part are too small.

8. The helical tooth detection method according to claim 7, characterized in that: Before the reference seat (3) is moved from the set stroke position to the starting position, the process includes: rotating the driving wheel (51) along a set direction and a set angle, and the ring gauge (2) is driven to rotate in a direction opposite to the helical tooth rotation direction of the measured part located at the detection position.

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