Inner hole automatic detection device

Abstract

The invention relates to an inner hole automatic detection device. The device comprises a base; a positioning member; the plug gauge and the positioning piece are arranged at intervals in the axial direction of the plug gauge, the plug gauge is connected to the base through a connecting structure, the connecting structure comprises a connecting base and a first driving piece, the connecting base can move relative to the base in the axial direction of the plug gauge, the first driving piece is used for driving the connecting base to move, and the plug gauge is connected to the connecting base and can move relative to the connecting base in the axial direction of the plug gauge; when the plug gauge abuts against the measured part, the plug gauge is limited by the measured part to move along with the connecting seat. The detection assembly comprises reference parts and a laser displacement sensor which are distributed at intervals in the axial direction of the plug gauge, the reference parts are connected to the base, the laser displacement sensor and the plug gauge are relatively fixed, and the laser displacement sensor detects the distance between the laser displacement sensor and the reference parts in the axial direction of the plug gauge. Automatic detection of the inner hole of the part can be realized, whether the inner hole of the part is qualified or not is judged by detecting the distance between the laser displacement sensor and the reference part, the influence of the environment is not easily caused, and the accuracy is high.

Description

Technical Field

[0001] The invention relates to the field of parts detection technology, and in particular to an automatic inner hole detection device. Background Art

[0002] In various types of mechanical equipment, such as Figure 1 The shaft parts with inner holes shown in the figure are widely used. The accuracy of the inner holes directly affects the matching accuracy with the counterparts and is related to the running stability of the mechanical equipment. Therefore, the accuracy detection of the inner holes is very important.

[0003] The inspection of the passability of the inner hole is generally carried out with a plug gauge. The plug gauge is inserted into the inner hole, and the inner hole is judged to be qualified based on whether the plug gauge can be inserted into the inner hole. At present, automatic detection devices are used to detect the inner hole. The method is to place the tested part in the detection position, insert the plug gauge into the inner hole by the automatic detection device, and manually observe or use optical instruments to detect the insertion depth of the plug gauge to judge whether the inner hole is qualified. However, both manual observation and optical instruments rely on visual recognition, which is easily affected by the environment and leads to large errors. Summary of the invention

[0004] Based on the above description, the present invention provides an automatic inner hole detection device to solve the problem that the method of judging whether the inner hole is qualified by manual observation or using optical instruments to detect the insertion depth of the plug gauge in the related technology relies on visual recognition and is easily affected by the environment and causes large errors.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: The present application provides an automatic inner hole detection device, and the technical solution adopted is as follows: An automatic inner hole detection device, comprising: Base; A positioning member connected to the base, used for positioning and supporting the part to be tested; A plug gauge, which is connected to the base, the plug gauge and the positioning member are spaced apart in the axial direction of the plug gauge, the plug gauge is connected to the base via a connecting structure, the connecting structure includes a connecting seat and a first driving member, the connecting seat can move relative to the base along the axial direction of the plug gauge, the first driving member is used to drive the connecting seat to move, the plug gauge is connected to the connecting seat, the plug gauge can move relative to the connecting seat along its axial direction, and is suitable for when the plug gauge moves with the connecting seat close to the positioning member to insert into the inner hole of the unqualified measured part to reach the maximum depth, the plug gauge is restricted by the measured part to continue to move with the connecting seat; The detection component includes reference parts and laser displacement sensors that are spaced apart along the axial direction of the plug gauge. The reference parts are connected to the base. The laser displacement sensor is relatively fixed to the plug gauge. The laser displacement sensor is used to detect the distance between the laser displacement sensor and the reference parts in the axial direction of the plug gauge.

[0006] Preferably, an elastic member is provided between the plug gauge and the connecting seat, and the plug gauge overcomes the elastic force of the elastic member when it moves relative to the connecting seat away from the positioning member.

[0007] Preferably, a first proximity switch is provided on the connecting seat, and the first proximity switch is triggered when the plug gauge moves a set distance relative to the connecting seat away from the positioning member.

[0008] Preferably, a second proximity switch is provided on the base, and the second proximity switch is triggered when the connecting seat moves a set distance close to the positioning member.

[0009] Preferably, a positioning hole is provided on the positioning member, the axis of the positioning hole is parallel to the axis of the plug gauge, the positioning hole is for the measured part to be embedded, when the measured part is embedded in the positioning hole, the inner hole end faces the plug gauge, and the axis of the inner hole is parallel to the axis of the plug gauge, and the measured part is restricted from radial movement and axial movement away from the plug gauge.

[0010] Preferably, the positioning member can move relative to the base along the axis direction of the positioning hole, and the base is provided with a second driving member for driving the positioning member to move.

[0011] Preferably, the plug gauge can move relative to the connecting seat in a plane perpendicular to its axis.

[0012] Preferably, the connecting seat is connected to a mounting seat, and the mounting seat can move relative to the connecting seat along the axial direction of the plug gauge, the mounting seat includes a mounting surface that is perpendicular to the axis of the plug gauge and faces the positioning piece, a plurality of balls located on the mounting surface are embedded in the mounting seat, the balls protrude from the mounting surface, the plug gauge is connected to a mounting block at one end away from the positioning piece, the mounting block includes a positioning surface parallel to the mounting surface, the positioning surface contacts with a plurality of balls, a limiting ring arranged around the plug gauge is connected to the mounting seat, the inner diameter of the limiting ring is larger than the outer diameter of the plug gauge, the mounting block is located between the limiting ring and the mounting surface, the limiting ring and the mounting seat cooperate to clamp the mounting block, and limit the movement of the mounting block relative to the mounting seat and the limiting ring along the axial direction of the plug gauge.

[0013] Compared with the prior art, the technical solution of the present application has at least the following beneficial technical effects: 1. When the present application detects the inner hole of a part, the positioning member is used to position and support the part to be measured, and the first driving member drives the connecting seat to move close to the positioning member to drive the plug gauge to move close to the part to be measured on the positioning member. During the design, the positioning member allows the part to maintain its axis parallel to the axis of the plug gauge and the inner hole end facing the plug gauge, and limits the movement of the part to be measured along the axis of the plug gauge relative to the base away from the plug gauge, so as to prevent the part from moving with the plug gauge after the plug gauge is inserted into the inner hole of the part. When the inner hole of the part to be measured meets the requirements, the plug gauge can be smoothly and completely inserted into the inner hole; when the inner hole of the part is unqualified, the plug gauge moves close to the part with the connecting seat until it is partially inserted into the inner hole of the part to reach the maximum depth, and then it abuts against the part. At this time, the plug gauge is blocked by the part and does not move with the connecting seat. When the connecting seat continues to move, it moves relative to the plug gauge. During the design, the stroke of the first driving member driving the connecting seat from the initial position close to the positioning member is set as a fixed value. When the connecting seat moves to the position closest to the positioning member, the plug gauge moves with the connecting seat until it is fully inserted into the inner hole of the standard part, and does not move relative to the connecting seat during the process. The distance between the plug gauge and the reference part detected by the laser displacement sensor of the detection component at this time is used as the standard parameter. When each part is detected, when the connecting seat moves to the position closest to the positioning member, the system compares the distance between the plug gauge and the reference part detected by the laser displacement sensor with the standard parameter. If the current distance data is different from the standard parameter, it indicates that the plug gauge is not fully inserted into the inner hole and the inner hole of the part is unqualified. If the current distance data is the same as the standard parameter, it indicates that the plug gauge is fully inserted into the inner hole and the inner hole of the part is qualified. The detection of the inner hole of the part can be realized, and the distance between the plug gauge and the reference part is judged by the laser displacement sensor, which is not easily affected by the environment, has high accuracy, and has a small detection error of the inner hole of the part.

[0014] 2. The present application sets an elastic member between the plug gauge and the connecting seat to overcome the elastic force of the elastic member when the plug gauge is blocked by the measured part and moves away from the positioning member relative to the connecting seat. Therefore, after completing the inspection of one part, the elastic force of the elastic member can move the positioning member relative to the connecting seat to reset to the initial position, so that subsequent parts can be inspected by the plug gauge. There is no need to manually reset the plug gauge, so that the inspection device can be used for automated batch inspection of parts to improve efficiency.

[0015] 3. The present application arranges the plug gauge to be movable relative to the connecting seat in a plane perpendicular to its axis. Due to equipment manufacturing and installation errors, the initial section of the inner hole may not be coaxial with the plug gauge after the part and the positioning piece are matched. At this time, the end face of the plug gauge will partially abut against the end face of the inner hole of the part and cannot be smoothly inserted into the inner hole. The plug gauge can be moved relative to the connecting seat in a plane perpendicular to its axis to offset the positioning error between the plug gauge and the inner hole of the part, thereby ensuring that the plug gauge is smoothly inserted into the inner hole of the part and ensuring smooth detection of the inner hole of the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the tested part in the present invention; Figure 2 A schematic diagram of the structure of an automatic inner hole detection device provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of the automatic inner hole detection device provided by an embodiment of the present invention from another perspective; Figure 4 A schematic diagram of the structure of a positioning member in an automatic inner hole detection device provided by an embodiment of the present invention; Figure 5 A schematic diagram of a connection assembly in an automatic inner hole detection device provided by an embodiment of the present invention; Figure 6 A schematic diagram of the automatic inner hole detection device provided in an embodiment of the present invention cooperating with a parts conveying turntable.

[0017] Description of reference numerals: 1. Base; 2. Positioning member; 21. Positioning hole; 3. Plug gauge; 31. Mounting block; 4. Detection assembly; 41. Reference member; 42. Laser displacement sensor; 5. Connecting seat; 51. Trigger block; 6. First guide rail; 7. First slider; 8. Second guide rail; 9. Second slider; 10. Support; 11. First proximity switch; 12. Second proximity switch; 13. Elastic member; 14. Support plate; 15. Connecting assembly; 151. Mounting seat; 1511. Mounting surface; 1512. Ball; 152. Limiting ring; 16. First driving member; 17. Second driving member; 18. Guide block. DETAILED DESCRIPTION

[0018] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0019] 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 belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0020] It will be appreciated that spatial relationship 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 appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "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 additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0021] 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. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0022] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0023] Reference Figure 2-6 As shown, an embodiment of the present application provides an automatic inner hole detection device, which includes a base 1, a positioning member 2, a plug gauge 3 and a detection component 4.

[0024] Reference Figure 2-3As shown, the base 1 is used to be fixed on the test table, the positioning member 2 is connected to the base 1 for positioning and supporting the tested part, the plug gauge 3 is connected to the base 1, the plug gauge 3 and the positioning member 2 are arranged at intervals in the axial direction of the plug gauge 3, and the plug gauge 3 is connected to the base 1 through a connecting structure, the connecting structure includes a connecting seat 5 and a first driving member 16, the connecting seat 5 can move relative to the base 1 along the axial direction of the plug gauge 3, the first driving member 16 is used to drive the connecting seat 5 to move, the plug gauge 3 is connected to the connecting seat 5, the plug gauge 3 can move relative to the connecting seat 5 along its axial direction, and it is suitable that when the plug gauge 3 moves with the connecting seat 5 close to the positioning member 2 to the maximum depth of the inner hole of the unqualified tested part, the plug gauge 3 is restricted by the tested part to continue to move with the connecting seat 5. The detection assembly 4 includes a reference member 41 and a laser displacement sensor 42 distributed at intervals along the axial direction of the plug gauge 3, the reference member 41 is connected to the base 1, the laser displacement sensor 42 is relatively fixed to the plug gauge 3, and the laser displacement sensor 42 is used to detect the distance between it and the reference member 41 in the axial direction of the plug gauge 3.

[0025] The positioning member 2 positions and supports the part to be measured, and the first driving member 16 drives the connecting seat 5 to move close to the positioning member 2, so as to drive the plug gauge 3 to move close to the part to be measured on the positioning member 2. When designed, the positioning member 2 keeps the axis of the part to be measured parallel to the axis of the plug gauge 3 and the inner hole end facing the plug gauge 3, and limits the movement of the part to be measured relative to the base 1 along the axis of the plug gauge 3 away from the plug gauge 3, so as to prevent the part from moving with the plug gauge 3 after the plug gauge 3 is inserted into the inner hole of the part. When the inner hole of the part to be measured meets the requirements, the plug gauge 3 can be smoothly and completely inserted into the inner hole; when the inner hole of the part is unqualified, the plug gauge 3 moves close to the part with the connecting seat 5 until it reaches the maximum depth after being inserted into the inner hole of the part, and then it abuts against the part. At this time, the plug gauge 3 is blocked by the part, and the plug gauge 3 does not move with the connecting seat 5. When the connecting seat 5 continues to move, it moves relative to the plug gauge 3.

[0026] During the design, the stroke of the first driving member 16 driving the connecting seat 5 to move from the initial position close to the positioning member 2 is set as a fixed value. When the connecting seat 5 moves to the position closest to the positioning member 2, the plug gauge 3 moves with the connecting seat 5 to be completely inserted into the inner hole of the standard part, and the plug gauge 3 and the connecting seat 5 do not move relative to each other during the process. The distance between the plug gauge 3 and the reference member 41 detected by the laser displacement sensor 42 of the detection component 4 at this time is used as the standard parameter. When each part is detected, when the connecting seat 5 moves to the position closest to the positioning member 2, the system compares the distance between the current laser displacement sensor 42 and the reference member 41 with the standard parameter. If the current distance data is different from the standard parameter, it indicates that the plug gauge 3 is not completely inserted into the inner hole, and the inner hole of the part is unqualified. If the current distance data is the same as the standard parameter, it indicates that the plug gauge 3 is completely inserted into the inner hole, and the inner hole of the part is qualified. The detection of the inner hole of the part can be realized, and the distance between the plug gauge 3 and the reference member 41 is detected by the laser displacement sensor 42 to judge, which is not easily affected by the environment, has high accuracy, and has a small detection error of the inner hole of the part.

[0027] Reference Figure 4 As shown, specifically, in order to realize the function of the positioning member 2 to position the part, a positioning hole 21 is provided on the positioning member 2, the axis of the positioning hole 21 is parallel to the axis of the plug gauge 3, and the positioning hole 21 is for the measured part to be embedded. When the measured part is embedded in the positioning hole 21, the inner hole end faces the plug gauge 3, and the inner hole axis is parallel to the axis of the plug gauge 3, and the measured part is restricted from radial movement and axial movement away from the plug gauge 3. In this embodiment, the positioning member 2 is cylindrical, and one end face thereof is provided with a positioning hole 21, and the diameter of the positioning hole 21 is consistent with the outer diameter of the end of the part away from the inner hole, so that the part is restricted from radial movement after being inserted into the positioning hole 21, and the end of the part and the bottom of the positioning hole 21 are abutted to restrict the part from moving relative to the positioning block in the axial direction and away from the plug rod.

[0028] Reference Figure 2-3 As shown, the movable connection between the connecting seat 5 and the base 1 is realized by the cooperation of the first guide rail 6 and the first slider 7. The first guide rail 6 is fixed on the base 1 and arranged along the axial direction of the plug gauge 3. The first slider 7 is slidably assembled with the guide rail and fixed to the connecting seat 5. The first driving member 16 can be a cylinder, which drives the connecting seat 5 to move relative to the base 1. In order to achieve precise control of the movement stroke of the connecting seat 5 close to the positioning member 2, a second proximity switch 12 is provided on the base 1, and a trigger block 51 is connected to the connecting seat 5. When the connecting seat 5 moves a set distance close to the positioning member 2, the trigger block 51 triggers the second proximity switch 12. At this time, the system receives a signal to control the cylinder to stop running, thereby achieving precise control of the stroke of the connecting seat 5.

[0029] Reference Figure 2-3 As shown, in order to realize the movable connection between the plug gauge 3 and the connecting seat 5, a second guide rail 8 along the axial direction of the plug gauge 3 is fixedly arranged on the connecting seat 5, a second slider 9 is slidably mounted on the second guide rail 8, a support 10 is fixed on the second slider 9, and the plug gauge 3 is connected to the support 10. The laser displacement sensor 42 is fixed on the support 10 through a connecting plate to realize the relative fixation of the laser displacement sensor 42 and the plug gauge 3. Correspondingly, the reference member 41 can be a reference plate, which is fixed on the base 1 and located on the measuring optical path of the laser displacement sensor 42.

[0030] Reference Figure 2-3As shown, after the inspection of an unqualified part is completed, the plug gauge 3 is blocked by the part and moves relative to the connecting seat 5. In order to reset the part to the initial position so as to continue to inspect the subsequent parts, an elastic member 13 is provided between the plug gauge 3 and the connecting seat 5. When the plug gauge 3 moves away from the positioning member 2 relative to the connecting seat 5, the elastic force of the elastic member 13 is overcome. Specifically, a support plate 14 is fixed on the connecting seat 5, and the support 10 and the support plate 14 are spaced apart in the axial direction of the plug gauge 3, and the support plate 14 is far away from the positioning member 2; the elastic member 13 adopts a compression spring, and its axis is parallel to the axis of the plug gauge 3. The compression spring is located between the support 10 and the support plate 14, and the side of the support 10 and the support plate 14 close to each other is respectively provided with a mounting hole for the compression spring to be embedded, and the two ends of the compression spring are respectively embedded in the mounting holes of the support 10 and the support plate 14. When the plug gauge 3 is restricted from moving by the parts, the connecting seat 5 continues to move close to the positioning member 2, so that the support 10 and the support plate 14 are close to each other, thereby squeezing the compression spring. When the connecting seat 5 moves away from the positioning member 2 and resets, the support 10 can be driven by the elastic force of the compression spring to move relative to the connecting seat 5 close to the positioning member 2, so that the plug gauge 3 is reset to the initial position, so that subsequent parts can be inspected by the plug gauge 3, so that the detection device can be used for automated batch detection of parts to improve efficiency.

[0031] Reference Figure 2-3 As shown, further, a first proximity switch 11 is provided on the connection seat 5, and the first proximity switch 11 is triggered when the plug gauge 3 moves a set distance relative to the connection seat 5 away from the positioning member 2. Specifically, the first proximity switch 11 is provided on the support plate 14, and the first proximity switch 11 is triggered when the support 10 moves a set distance relative to the connection seat 5 away from the positioning member 2. Through this arrangement, it is possible to avoid the plug gauge 3 being blocked by parts and colliding with the support plate 14 due to excessive movement of the plug gauge 3 relative to the connection seat 5 during the movement of the connection seat 5 close to the positioning member 2, and to avoid the plug gauge 3 being damaged by rigid collision with parts.

[0032] Reference Figure 3 and Figure 5 As shown, due to equipment manufacturing and installation errors, the initial section of the inner hole after the part and the positioning member 2 are matched may be not coaxial with the plug gauge 3. At this time, the end face of the plug gauge 3 will partially abut against the end face of the inner hole of the part and cannot be smoothly inserted into the inner hole. In order to ensure the smooth progress of the part inner hole detection work, the plug gauge 3 is set to be movable relative to the connecting seat 5 in a plane perpendicular to its axis, so that the positioning error between the plug gauge 3 and the inner hole of the part can be offset by the movement of the plug gauge 3 relative to the connecting seat 5 in a plane perpendicular to its axis, so as to ensure that the plug gauge 3 is smoothly inserted into the inner hole of the part and complete the inner hole detection.

[0033] Reference Figure 3 and Figure 5As shown, in order to realize the function of the plug gauge 3 moving relative to the connecting seat 5 in a plane perpendicular to its axis, the plug gauge 3 is connected to the support 10 through a connecting assembly 15, and the connecting assembly 15 includes a mounting seat 151 fixed on the support 10, and the mounting seat 151 includes a mounting surface 1511 which is perpendicular to the axis of the plug gauge 3 and faces the positioning member 2, and a plurality of balls 1512 located on the mounting surface 1511 are embedded in the mounting seat 151, and the balls 1512 protrude from the mounting surface 1511. A mounting block 31 is connected, and the mounting block 31 includes a positioning surface parallel to the mounting surface 1511, and the positioning surface contacts a plurality of balls 1512. A limiting ring 152 arranged around the plug gauge 3 is connected to the mounting seat 151, and the inner diameter of the limiting ring 152 is larger than the outer diameter of the plug gauge 3. The mounting block 31 is located between the limiting ring 152 and the mounting surface 1511. The limiting ring 152 and the mounting seat 151 cooperate to clamp the mounting block 31 and limit the movement of the mounting block 31 along the axial direction of the plug gauge 3 relative to the mounting seat 151 and the limiting ring 152.

[0034] Reference Figure 5 As shown, specifically, the side of the stop ring 152 and the mounting block 31 close to each other is a plane parallel to the mounting surface 1511, so that the mounting block 31 can move radially relative to the stop ring 152. The mounting seat 151 can move relative to the connecting seat 5 with the support 10. The stop ring 152 and the mounting seat 151 cooperate to clamp the mounting block 31, limit the axial movement of the mounting block 31 along the plug gauge 3, so that the plug gauge 3 is relatively fixed with the support 10 in the axial direction. Since the positioning error between the plug gauge 3 and the inner hole of the part is small, the difference between the inner diameter of the stop ring 152 and the outer diameter of the plug gauge 3 is set small, so that the plug gauge 3 can move radially relative to the connecting seat 5 and ensure the stability of the plug gauge 3. The setting of the ball 1512 can reduce the friction resistance between the mounting block 31 and the mounting seat 151 when the plug gauge 3 moves radially. The ball 1512 can also be set on the side surface of the stop ring 152 close to the mounting block 31 to further reduce the sliding resistance of the mounting block 31. In this embodiment, the limiting ring 152 is fixed to the mounting seat 151 by a plurality of bolts.

[0035] Reference Figure 2-3 As shown, a guide block 18 is also connected to the base 1. The guide block 18 is provided with a guide hole for the plug rod to pass through. The diameter of the guide hole is larger than the outer diameter of the plug rod. The plug rod passes through the guide hole to guide the plug rod through the guide block 18.

[0036] Reference Figure 2-3 and Figure 6As shown, further, the positioning member 2 is set to be movable relative to the base 1 along the axial direction of the positioning hole 21, and a second driving member 17 for driving the positioning member 2 to move is provided on the base 1; the second driving member 17 can be a cylinder, and the stroke of the positioning member 2 moving from the initial position to the plug gauge 3 is set to a fixed value. Through this setting, the inner hole automatic detection device of the present application can be matched with the automated part conveying turntable, and the device of the present application can be set at a station around the part conveying turntable, so that the plug gauge 3 and the positioning member 2 are respectively located on both sides of the turntable axial direction, and the measured part is input or output from the station by the conveying turntable, so that when the measured part is input to the station where the inner hole automatic detection device of the present application is located, the part is located between the plug gauge 3 and the positioning member 2 and is coaxial with the positioning member 2, and the positioning member 2 is driven by the cylinder to move close to the plug gauge 3, that is, close to the turntable to insert the part into the positioning hole 21, and the positioning member 2 is supported and positioned. Automatic loading and unloading and automatic detection of the measured parts can be realized, and batch automatic detection of parts can be realized.

[0037] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic inner hole detection device, characterized in that: include: Base (1); A positioning member (2) connected to the base (1) and used for positioning and supporting the part to be tested; A plug gauge (3) connected to the base (1), the plug gauge (3) and the positioning member (2) being spaced apart in the axial direction of the plug gauge (3), the plug gauge (3) being connected to the base (1) via a connecting structure, the connecting structure comprising a connecting seat (5) and a first driving member (16), the connecting seat (5) being movable relative to the base (1) along the axial direction of the plug gauge (3), the first driving member (16) being used to drive the connecting seat (5) to move, the plug gauge (3) being connected to the connecting seat (5), the plug gauge (3) being movable relative to the connecting seat (5) along the axial direction thereof, and being adapted for when the plug gauge (3) moves with the connecting seat (5) close to the positioning member (2) until the plug gauge (3) is inserted into the inner hole of an unqualified measured part to reach a maximum depth, the plug gauge (3) being restricted by the measured part to continue to move with the connecting seat (5); A detection assembly (4) comprising reference pieces (41) and laser displacement sensors (42) spaced apart along the axial direction of the plug gauge (3); the reference pieces (41) are connected to the base (1); the laser displacement sensors (42) are relatively fixed to the plug gauge (3); and the laser displacement sensors (42) are used to detect the distance between the laser displacement sensors (42) and the reference pieces (41) in the axial direction of the plug gauge (3).

2. The automatic inner hole detection device according to claim 1, characterized in that: An elastic member (13) is provided between the plug gauge (3) and the connecting seat (5), and the plug gauge (3) overcomes the elastic force of the elastic member (13) when moving relative to the connecting seat (5) away from the positioning member (2).

3. The automatic inner hole detection device according to claim 1, characterized in that: The connecting seat (5) is provided with a first proximity switch (11), and the first proximity switch (11) is triggered when the plug gauge (3) moves a set distance relative to the connecting seat (5) away from the positioning member (2).

4. The automatic inner hole detection device according to claim 1, characterized in that: The base (1) is provided with a second proximity switch (12), and the second proximity switch (12) is triggered when the connecting seat (5) moves close to the positioning member (2) by a set distance.

5. The automatic inner hole detection device according to claim 1, characterized in that: The positioning member (2) is provided with a positioning hole (21), the axis of the positioning hole (21) is parallel to the axis of the plug gauge (3), the positioning hole (21) is for the measured part to be inserted, when the measured part is inserted into the positioning hole (21), the inner hole end faces the plug gauge (3), and the axis of the inner hole is parallel to the axis of the plug gauge (3), and the measured part is restricted from radial movement and axial movement away from the plug gauge (3).

6. The automatic inner hole detection device according to claim 5, characterized in that: The positioning member (2) can move relative to the base (1) along the axial direction of the positioning hole (21), and the base (1) is provided with a second driving member (17) for driving the positioning member (2) to move.

7. The automatic inner hole detection device according to claim 1, characterized in that: The plug gauge (3) can move relative to the connecting seat (5) in a plane perpendicular to its axis.

8. The automatic inner hole detection device according to claim 7, characterized in that: The connecting seat (5) is connected to a mounting seat (151), and the mounting seat (151) can move relative to the connecting seat (5) along the axial direction of the plug gauge (3), the mounting seat (151) comprises a mounting surface (1511) which is perpendicular to the axis of the plug gauge (3) and faces the positioning member (2), and the mounting seat (151) is embedded with a plurality of balls (1512) located on the mounting surface (1511), and the balls (1512) protrude from the mounting surface (1511), and the plug gauge (3) is connected to a mounting block (31) at one end away from the positioning member (2), and the mounting block (31) comprises a mounting surface (1511) which is perpendicular to the axis of the plug gauge (3) and faces the positioning member (2). (1511) and a positioning surface parallel to the plug gauge (3), the positioning surface is in contact with the plurality of balls (1512), a limiting ring (152) arranged around the plug gauge (3) is connected to the mounting seat (151), the inner diameter of the limiting ring (152) is larger than the outer diameter of the plug gauge (3), the mounting block (31) is located between the limiting ring (152) and the mounting surface (1511), the limiting ring (152) and the mounting seat (151) cooperate to clamp the mounting block (31), and limit the movement of the mounting block (31) along the axial direction of the plug gauge (3) relative to the mounting seat (151) and the limiting ring (152).

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