Automatic thread detection device

Abstract

The invention relates to an automatic thread detection device. The device comprises a base; the thread gauge is connected to the base through a connecting structure, the connecting structure comprises a connecting seat and a mounting seat, the connecting seat can move relative to the base in the axial direction of the thread gauge, the mounting seat can move relative to the connecting seat in the axial direction of the thread gauge, and the thread gauge is connected to the mounting seat; the laser displacement sensor is connected to the connecting seat, and the laser displacement sensor is used for detecting the distance between the laser displacement sensor and the mounting seat in the axial direction of the plug thread gauge; when the thread gauge rotates and the mounting seat moves close to the measured part along with the connecting seat, and the thread gauge and the mounting seat are limited by the measured part to continue to move along with the connecting seat when the thread gauge and the unqualified measured part reach the maximum matching degree. The device can achieve the automatic detection of part threads, judges whether a part is qualified or not through the detection of the distance between the laser displacement sensor and the installation seat, is high in accuracy, and is high in precision of a part thread detection result.

Description

Technical Field

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

[0002] Threaded connection is a commonly used connection method. The quality of the threads on the parts directly affects the assembly stability of the product. Therefore, after the thread processing of the parts is completed, thread inspection is an important task that needs to be carried out.

[0003] The detection of part threads is generally carried out through thread gauges. Internal threads are detected by external thread gauges, and external threads are detected by internal thread gauges. At present, there are devices for automatic detection of part threads. By positioning the part to be tested at the detection position, the thread gauge is controlled by a motor or cylinder to make linear and rotational movements, so that the thread gauge is connected to the thread of the part to be tested. The degree of fit between the thread gauge and the part under the set linear stroke is used to judge whether the part to be tested is qualified. The degree of fit between the thread gauge and the part is usually judged manually. Due to the large error in manual judgment, it is difficult to ensure the accuracy of the part detection results for parts with high precision requirements by manual judgment methods. Summary of the invention

[0004] Based on the above description, the present invention provides an automatic thread detection device to solve the problem in the related technology that the degree of fit between the thread gauge and the part is usually judged manually. Due to the large error in manual judgment, for parts with high precision requirements, the manual judgment method is difficult to ensure the accuracy of the part detection results.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: The present application provides an automatic thread detection device, and the technical solution adopted is as follows: An automatic thread detection device, comprising: Base; A thread gauge connected to the base via a connecting structure, wherein the connecting structure comprises a connecting seat and a mounting seat, wherein the connecting seat is connected to the base and can move relative to the base along the axial direction of the thread gauge, wherein the mounting seat is connected to the connecting seat and can move relative to the connecting seat along the axial direction of the thread gauge, wherein the thread gauge is connected to the mounting seat, wherein a first driving member for driving the connecting seat to move is provided between the connecting seat and the base, and a second driving member for driving the thread gauge to rotate around its own axis is provided between the mounting seat and the thread gauge; A laser displacement sensor connected to the connecting seat, the laser displacement sensor being used to detect the distance between the laser displacement sensor and the mounting seat in the axial direction of the plug thread gauge; Among them, it is suitable that during the process of the thread gauge rotating and moving with the mounting seat along with the connecting seat close to the measured part, when the thread gauge and the unqualified measured part reach the maximum degree of matching, the thread gauge and the mounting seat are restricted by the measured part to continue to move with the connecting seat.

[0006] Preferably, a first elastic member is provided between the mounting seat and the connecting seat, and the mounting seat overcomes the elastic force of the first elastic member when it moves axially along the thread gauge relative to the connecting seat.

[0007] Preferably, the thread gauge is connected to the second driving member via a clutch mechanism, which is suitable for transmitting the power of the second driving member to the thread gauge via the clutch mechanism when the thread gauge can rotate freely, and blocking the power transmission between the second driving member and the thread gauge via the clutch mechanism when the rotation of the thread gauge is blocked.

[0008] Preferably, the second driving member includes a motor, the clutch mechanism connects the output shaft of the motor with the thread gauge, and the clutch mechanism includes: A movable engagement ring, which is coaxially sleeved outside the output shaft, and the movable engagement ring can move relative to the output shaft along the axial direction of the output shaft, and is restricted from rotating relative to the output shaft; A fixed meshing ring, which is coaxially sleeved outside the output shaft and spaced apart from the movable meshing ring in the axial direction of the output shaft, the fixed meshing ring is coaxially fixed to the thread gauge, the fixed meshing ring and the output shaft can rotate relative to each other and is relatively fixed to the output shaft in the axial direction of the output shaft, and the end faces of the fixed meshing ring and the movable meshing ring that are close to each other are provided with end face teeth that match each other; A second elastic member connects the movable meshing ring and the output shaft. When the movable meshing ring moves axially away from the fixed meshing ring, the elastic force of the second elastic member is overcome. The second elastic member is used to keep the movable meshing ring in meshing state with the fixed meshing ring, and is suitable for overcoming the elastic force of the second elastic member by the axial force generated by the cooperation of the end face teeth on the fixed meshing ring and the movable meshing ring when the rotation of the thread gauge is blocked, so that the movable meshing ring is disengaged from the fixed meshing ring.

[0009] Preferably, the thread gauge is connected to the fixed engagement ring via a floating connector.

[0010] Preferably, a clamp is provided on the base, and the clamp and the thread gauge are spaced apart in the axial direction of the thread gauge. The clamp is used to clamp the part to be measured. When the part to be measured is clamped by the clamp, the thread axis is coaxial with the thread gauge, and the part to be measured is restricted from moving radially along the thread and rotating around the axis.

[0011] Preferably, two first travel switches are provided on the base, and the two first travel switches are arranged at intervals along the axial direction of the thread gauge. A triggering member for triggering the first travel switch is connected to the connecting seat, and when the first travel switch is triggered, a signal is sent to the control system, and when the control system receives the first travel switch signal, it controls the first driving member to stop running.

[0012] Compared with the prior art, the technical solution of the present application has at least the following beneficial technical effects: 1. The present application connects the thread gauge to the base through a connecting structure. The base is used to be fixed on the inspection table. The inspection position of the part to be measured is set on the moving path of the thread gauge. The first driving member drives the connecting seat to move to realize the function of controlling the thread gauge to move close to or away from the part to be measured. The second driving member drives the thread gauge to rotate so that the thread gauge and the thread of the part to be measured are matched. When the thread gauge moves with the connecting seat close to the part to be measured and forms a match with the thread of the part to be measured, if the thread of the part to be measured is qualified, the thread gauge can form a complete match with the thread of the part to be measured. If the thread of the part to be measured is unqualified, the thread gauge and the thread of the part to be measured cannot be completely matched, and when the maximum degree of matching is reached, the thread gauge and the part to be measured are abutted in the axial direction. When designing, the initial distance between the laser displacement sensor and the mounting seat is set as a standard parameter, the stroke of the first driving member driving the connecting seat to move from the initial position close to the part to be measured is set to a fixed value, and when the connecting seat reaches the maximum stroke, the thread gauge and the qualified thread of the part to be measured are completely matched, and the thread gauge does not move relative to the connecting seat during the movement of the connecting seat. For parts with qualified threads, when the connecting seat moves close to the measured part to the maximum stroke position, the thread gauge does not abut against the measured part, the thread gauge and the mounting seat do not move relative to the connecting seat, and the distance between the laser displacement sensor and the mounting seat does not change; while for parts with unqualified threads, when the connecting seat moves close to the measured part to the maximum stroke position, the thread gauge and the measured part abut after reaching the maximum degree of fit, at which time the thread gauge and the mounting seat are restricted from continuing to move with the connecting seat, that is, the thread gauge and the mounting seat move relative to the connecting seat, and the distance between the laser displacement sensor and the mounting seat changes. When testing each measured part, when the connecting seat moves close to the measured part to the maximum stroke position, the system compares the current distance between the laser displacement sensor and the mounting seat with the standard parameters. If the current distance data is different from the standard parameters, it indicates that the thread gauge and the measured part thread are not fully matched, and the part thread is unqualified. If the current distance data is the same as the standard parameters, it indicates that the thread gauge and the measured part thread are fully matched, and the part thread is qualified. The automatic detection of part threads can be realized by using the laser displacement sensor to detect the distance between the part and the mounting base, which has high accuracy and the precision of the part thread detection results.

[0013] 2. The present application sets a first elastic member between the connecting seat and the mounting seat, and overcomes the elastic force of the first elastic member when the mounting seat moves relative to the connecting seat along the axial direction of the thread gauge. After completing the inspection of a part, the elastic force of the first elastic member can reset the mounting seat to the initial position, so that before each inspection of the part, the distance between the mounting seat and the laser displacement sensor is maintained at a standard parameter to facilitate the inspection of subsequent parts, so that the device can be used for automated batch inspection of parts to improve inspection efficiency.

[0014] 3. The present application connects the thread gauge and the second drive member through a clutch mechanism, and the clutch mechanism realizes the transmission or disconnection of rotational power between the second drive member and the thread gauge. When the thread gauge is matched with the measured part, the clutch mechanism transmits the power of the second drive member to the thread gauge, so that the thread gauge rotates relative to the measured part to make the thread gauge and the thread form a match. When the thread gauge and the measured part reach the maximum degree of fit, the thread gauge continues to rotate, which may cause damage to itself or the second drive member. At this time, the power transmission is disconnected through the clutch mechanism, so that the thread gauge does not rotate with the second drive member to protect the thread gauge and the part.

[0015] 4. The present application forms a clutch mechanism through a fixed meshing ring and a movable meshing ring. When the movable meshing ring is meshed with the fixed meshing ring, the power transmission function is realized. The elastic force of the second elastic member enables the power to be transmitted to the freely rotatable thread gauge. When the rotation of the thread gauge is limited, the axial force generated by the end face teeth on the fixed meshing ring and the movable meshing ring overcomes the elastic force of the second elastic member, so that the movable meshing ring is disengaged from the fixed meshing ring to disconnect the power transmission. The clutch mechanism can automatically switch between the state of transmitting the power of the second driving member to the thread gauge and the state of blocking the power transmission, with a high degree of automation and improved work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of an automatic thread detection device provided by an embodiment of the present invention; Figure 2 A structural schematic diagram of a connection structure in an automatic thread detection device provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a clutch mechanism in an automatic thread detection device provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Base; 2. Thread gauge; 3. Laser displacement sensor; 4. Connecting seat; 5. Mounting seat; 6. First driving member; 7. Second driving member; 71. Output shaft; 711. Guide groove; 8. First travel switch; 9. Trigger; 10. Second travel switch; 11. Guide rail; 12. Slider; 13. First elastic member; 14. Support plate; 15. Clutch mechanism; 151. Movable meshing ring; 152. Fixed meshing ring; 153. Second elastic member; 154. Fixed ring; 16. Floating connector; 17. Clamp. 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 1-3 As shown, an embodiment of the present application provides an automatic thread detection device, including a base 1, a connection structure, a thread gauge 2 and a laser displacement sensor 3.

[0024] Reference Figure 1-2 As shown, the base 1 is used to be fixed on the part inspection workbench, the connection structure connects the thread gauge 2 and the base 1, the connection structure includes a connection seat 4 and a mounting seat 5, the connection seat 4 is connected to the base 1 and can move relative to the base 1 along the axial direction of the thread gauge 2, the mounting seat 5 is connected to the connection seat 4 and can move relative to the connection seat 4 along the axial direction of the thread gauge 2, the thread gauge 2 is connected to the mounting seat 5, a first driving member 6 for driving the connection seat 4 to move is provided between the connection seat 4 and the base 1, and a second driving member 7 for driving the thread gauge 2 to rotate around its own axis is provided between the mounting seat 5 and the thread gauge 2. The laser displacement sensor 3 is connected to the connection seat 4, and the laser displacement sensor 3 is used to detect the distance between it and the mounting seat 5 in the axial direction of the plug thread gauge 2. It is suitable for when the thread gauge 2 rotates and moves with the mounting seat 5 along the connection seat 4 close to the measured part, when the thread gauge 2 reaches the maximum degree of fit with the unqualified measured part, the thread gauge 2 and the mounting seat 5 are restricted by the measured part to continue to move with the connection seat 4.

[0025] Specifically, when installing the detection device of this embodiment, the detection position of the part to be measured is set on the moving path of the thread gauge 2, and the first driving member 6 drives the connecting seat 4 to move to realize the function of controlling the thread gauge 2 to move close to or away from the part to be measured, and the second driving member 7 drives the thread gauge 2 to rotate so that the thread gauge 2 and the thread of the part to be measured are matched. When the thread gauge 2 moves close to the part to be measured with the connecting seat 4 to form a match with the thread of the part to be measured, if the thread of the part to be measured is qualified, the thread gauge 2 can be fully matched with the thread of the part to be measured, and if the thread of the part to be measured is unqualified, the thread gauge 2 cannot be fully matched with the thread of the part to be measured, and when the maximum degree of matching is reached, the thread gauge 2 and the part to be measured are abutted in the axial direction.

[0026] During the design, the initial distance between the laser displacement sensor 3 and the mounting seat 5 is set as a standard parameter, the stroke of the first driving member 6 driving the connecting seat 4 to move from the initial position close to the measured part is set to a fixed value, and when the connecting seat 4 reaches the maximum stroke, the thread gauge 2 is fully matched with the thread of the qualified measured part, and the thread gauge 2 does not move relative to the connecting seat 4 during the movement of the connecting seat 4. For parts with qualified threads, when the connecting seat 4 moves close to the measured part to the maximum stroke position, the thread gauge 2 does not abut against the measured part, the thread gauge 2 and the mounting seat 5 do not move relative to the connecting seat 4, and the distance between the laser displacement sensor 3 and the mounting seat 5 does not change; while for parts with unqualified threads, when the connecting seat 4 moves close to the measured part to the maximum stroke position, the thread gauge 2 abuts against the measured part after reaching the maximum degree of matching, and at this time, the thread gauge 2 and the mounting seat 5 are restricted from continuing to move with the connecting seat 4, that is, the thread gauge 2 and the mounting seat 5 move relative to the connecting seat 4, and the distance between the laser displacement sensor 3 and the mounting seat 5 changes. When testing each part to be tested, when the connecting seat 4 moves close to the part to be tested to the maximum stroke position, the system compares the distance between the current laser displacement sensor 3 and the mounting seat 5 with the standard parameters. If the current distance data is different from the standard parameters, it indicates that the thread gauge 2 and the thread of the part to be tested are not fully matched, and the thread of the part is unqualified. If the current distance data is the same as the standard parameters, it indicates that the thread gauge 2 and the thread of the part to be tested are fully matched, and the thread of the part is qualified. Automatic detection of part threads is achieved, and the distance between the laser displacement sensor 3 and the mounting seat 5 is used to judge, with high accuracy, and the precision of the part thread detection results is high.

[0027] Reference Figure 1-2 As shown, in order to achieve precise control of the moving stroke of the connecting seat 4, two first stroke switches 8 are provided on the base 1, and the two first stroke switches 8 are arranged at intervals along the axial direction of the thread gauge 2. A triggering member 9 for triggering the first stroke switch 8 is connected to the connecting seat 4. When the first stroke switch 8 is triggered, a signal is sent to the control system. When the control system receives the signal of the first stroke switch 8, the first driving member 6 is controlled to stop running. Among them, the two first stroke switches 8 are respectively set at the initial position and the maximum stroke position of the connecting seat 4. When the connecting seat 4 moves to the corresponding position, the corresponding first stroke switch 8 is triggered. After receiving the signal of the first stroke switch 8, the control system controls the first driving member 6 to stop moving, thereby achieving precise control of the stroke of the connecting seat 4. The first driving member 6 can be a cylinder or a linear module, which can be selected according to needs. In this embodiment, a linear module is used for illustration. Correspondingly, the connecting seat 4 is fixed to the slide of the linear module.

[0028] Reference Figure 1-2As shown, when the part is inspected, when the connecting seat 4 moves to the maximum stroke position close to the measured part, the first stroke switch 8 at this position is triggered, and the control system controls the first driving member 6 to stop running and reverse according to the signal of the first stroke switch 8. At the same time, the detection data of the laser displacement sensor 3 is obtained and compared with the standard data to determine whether the part is qualified, and the second driving member 7 is controlled to stop running and reverse running, so that the thread gauge 2 is separated from the measured part. In order to realize the control of the operation and stop of the second driving member 7, a second stroke switch 10 is provided on the base 1. The second stroke switch 10 is located between the two first stroke switches 8 in the axial direction of the thread gauge 2. The trigger member 9 is also used to trigger the second stroke switch 10. When the second stroke switch 10 is triggered, it sends a signal to the control system. When the control system receives the signal of the second stroke switch 10, it controls the second driving member 7 to run or stop running. Specifically, when the second stroke switch 10 is triggered during the movement of the connecting seat 4 from the initial position to the measured part, the control system controls the second driving member 7 to start running. When the second stroke switch 10 is triggered during the movement of the connecting seat 4 from the maximum stroke position away from the measured part, the control system controls the second driving member 7 to stop running.

[0029] Reference Figure 1-2 As shown, in order to realize the movable connection between the mounting seat 5 and the connecting seat 4, a guide rail 11 extending along the axial direction of the thread gauge 2 is provided on the mounting seat 5, a slider 12 is mounted on the guide rail 11, and the mounting seat 5 is fixed to the slider 12. When the laser displacement sensor 3 is set, the mounting seat 5 is located in the detection optical path of the laser displacement sensor 3.

[0030] Reference Figure 1-2 As shown, further, a first elastic member 13 is provided between the mounting seat 5 and the connecting seat 4, and the mounting seat 5 overcomes the elastic force of the first elastic member 13 when it moves relative to the connecting seat 4 along the axial direction of the thread gauge 2. Specifically, a support plate 14 is connected to the connecting seat 4, and the support plate 14 and the mounting seat 5 are spaced apart in the axial direction of the thread gauge 2. The first elastic member 13 is a spring, and the axis of the spring is parallel to the axis of the thread gauge 2. The spring is located between the support plate 14 and the mounting seat 5, and the two ends of the spring are respectively fixed to the support plate 14 and the mounting seat 5. When the thread gauge 2 is blocked by an unqualified part, the mounting seat 5 and the thread gauge 2 move relative to the connecting seat 4 and overcome the elastic force of the first elastic member 13. At this time, after the inspection of the part is completed, the first elastic member 13 restores the deformation to reset the mounting seat 5 to the initial position, so that before each inspection of the part, the distance between the mounting seat 5 and the laser displacement sensor 3 is kept as a standard parameter, so as to inspect the subsequent parts. The device can be used for automatic batch inspection of parts to improve the inspection efficiency.

[0031] Reference Figure 2-3As shown, when the thread gauge 2 and the unqualified measured part reach the maximum degree of fit, the connecting seat 4 has not reached the maximum stroke position. At this time, the second driving member 7 is still in the starting state. In order to avoid damage to the thread gauge 2 and the second driving member 7, the thread gauge 2 is connected to the second driving member 7 through the clutch mechanism 15, which is suitable for when the thread gauge 2 can rotate freely, the power of the second driving member 7 is transmitted to the thread gauge 2 through the clutch mechanism 15, and when the rotation of the thread gauge 2 is blocked, the power transmission between the second driving member 7 and the thread gauge 2 is blocked by the clutch mechanism 15.

[0032] Reference Figure 2-3 As shown, specifically, the second driving member 7 is a motor, and the clutch mechanism 15 connects the output shaft 71 of the motor with the thread gauge 2. The clutch mechanism 15 includes a movable meshing ring 151, a fixed meshing ring 152 and a second elastic member 153. Among them, the movable meshing ring 151 is coaxially sleeved outside the output shaft 71, and the movable meshing ring 151 can move relative to the output shaft 71 along the axial direction of the output shaft 71, and is restricted from rotating relative to the output shaft 71. The fixed meshing ring 152 is coaxially sleeved outside the output shaft 71 and is spaced apart from the movable meshing ring 151 in the axial direction of the output shaft 71. The fixed meshing ring 152 is coaxially fixed to the thread gauge 2, and the fixed meshing ring 152 can rotate relative to the output shaft 71 and is relatively fixed to the output shaft 71 in the axial direction of the output shaft 71. The end faces of the fixed meshing ring 152 and the movable meshing ring 151 that are close to each other are provided with end face teeth that match each other. The second elastic member 153 connects the movable meshing ring 151 and the output shaft 71. When the movable meshing ring 151 moves axially away from the fixed meshing ring 152, the elastic force of the second elastic member 153 is overcome. The second elastic member 153 is used to keep the movable meshing ring 151 and the fixed meshing ring 152 in a meshing state, and is suitable for overcoming the elastic force of the second elastic member 153 when the rotation of the thread gauge 2 is blocked, so that the movable meshing ring 151 and the fixed meshing ring 152 are disengaged.

[0033] Reference Figure 2-3As shown, specifically, the motor is fixed on the mounting seat 5, and a guide groove 711 extending in the axial direction is provided on the outer wall of the motor output shaft 71. The inner diameter of the movable meshing ring 151 is the same as the outer diameter of the output shaft 71. A guide block (not shown in the figure) embedded in the guide groove 711 is connected to the inner wall of the movable meshing ring 151. The movable meshing ring 151 can move axially along the output shaft 71 and is restricted from rotating relative to the output shaft 71 through the cooperation of the guide groove 711 and the guide block. The fixed meshing ring 152 is rotatably connected to the output shaft 71 through a bearing. The second elastic member 153 adopts a compression spring, and a fixed ring 154 is sleeved on the output shaft 71. The fixed ring 154 is located on the side of the movable meshing ring 151 away from the fixed meshing ring 152. The fixed ring 154 is fixed to the output shaft 71, and the two ends of the compression spring are respectively fixed to the fixed ring 154 and the movable meshing ring 151. In this embodiment, two second elastic members 153 are provided and distributed on opposite sides of the output shaft 71.

[0034] Through the above arrangement, the fixed meshing ring 152 and the movable meshing ring 151 form a clutch mechanism 15, and the movable meshing ring 151 realizes the power transmission function when meshing with the fixed meshing ring 152, and the power can be transmitted to the freely rotatable thread gauge 2 through the elastic force of the second elastic member 153, and when the rotation of the thread gauge 2 is limited, the axial force generated by the end face teeth on the fixed meshing ring 152 and the movable meshing ring 151 overcomes the elastic force of the second elastic member 153, so that the movable meshing ring 151 is disengaged from the fixed meshing ring 152 to disconnect the power transmission, so that the motor can run normally, and the thread gauge 2 does not rotate with the second driving member 7, so as to protect the motor, the thread gauge 2 and the parts. The clutch mechanism 15 can automatically switch between the state of transmitting the power of the second driving member 7 to the thread gauge 2 and the state of blocking the power transmission, with a high degree of automation, which can improve work efficiency.

[0035] Reference Figure 1-3 As shown, the thread gauge 2 is connected to the fixed engagement ring 152 via a floating connector 16, so that the thread gauge 2 has a certain amount of floating when passing through the floating connector 16, ensuring that the thread gauge 2 and the thread of the measured part are in a mating state.

[0036] Reference Figure 1-2 As shown, further, a clamping jaw 17 can be provided on the base 1 for clamping the part to be measured, and the clamping jaw 17 and the thread gauge 2 are spaced apart in the axial direction of the thread gauge 2. When the part to be measured is clamped by the clamping jaw 17, the thread axis is coaxial with the thread gauge 2, and the part to be measured is restricted from moving radially along the thread and rotating around the axis. Specifically, when installing the detection device of this embodiment, the clamping jaw 17 is located in the detection position of the part to be measured, and the part to be measured can be transported to the detection position through the conveying turntable, and the part to be measured is clamped by the clamping jaw 17 to keep the part to be measured stable, ensuring that the thread gauge 2 and the part to be measured enter the thread matching state. The clamping jaw 17 adopts an electric clamping jaw 17 to achieve automatic control.

[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 thread detection device, characterized in that: include: Base (1); A thread gauge (2) connected to the base (1) via a connecting structure, the connecting structure comprising a connecting seat (4) and a mounting seat (5), the connecting seat (4) connected to the base (1) and movable relative to the base (1) along the axial direction of the thread gauge (2), the mounting seat (5) connected to the connecting seat (4) and movable relative to the connecting seat (4) along the axial direction of the thread gauge (2), the thread gauge (2) connected to the mounting seat (5), a first driving member (6) for driving the connecting seat (4) to move is provided between the connecting seat (4) and the base (1), and a second driving member (7) for driving the thread gauge (2) to rotate around its own axis is provided between the mounting seat (5) and the thread gauge (2); a laser displacement sensor (3) connected to the connecting seat (4), the laser displacement sensor (3) being used to detect the distance between the laser displacement sensor (3) and the mounting seat (5) in the axial direction of the plug thread gauge (2); Wherein, it is suitable that when the thread gauge (2) rotates and moves with the mounting seat (5) along with the connecting seat (4) close to the measured part, when the thread gauge (2) and the unqualified measured part reach the maximum degree of fit, the thread gauge (2) and the mounting seat (5) are restricted by the measured part to continue to move with the connecting seat (4).

2. The automatic thread detection device according to claim 1, characterized in that: A first elastic member (13) is provided between the mounting seat (5) and the connecting seat (4), and the mounting seat (5) overcomes the elastic force of the first elastic member (13) when it moves axially relative to the connecting seat (4) along the thread gauge (2).

3. The automatic thread detection device according to claim 1, characterized in that: The thread gauge (2) is connected to the second driving member (7) via a clutch mechanism (15), and is suitable for transmitting power of the second driving member (7) to the thread gauge (2) via the clutch mechanism (15) when the thread gauge (2) can rotate freely, and blocking power transmission between the second driving member (7) and the thread gauge (2) via the clutch mechanism (15) when the rotation of the thread gauge (2) is blocked.

4. The automatic thread detection device according to claim 3, characterized in that: The second driving member (7) comprises a motor, the clutch mechanism (15) connects the output shaft (71) of the motor with the thread gauge (2), and the clutch mechanism (15) comprises: a movable engagement ring (151) coaxially sleeved outside the output shaft (71); the movable engagement ring (151) can move relative to the output shaft (71) along the axial direction of the output shaft (71) and is restricted from rotating relative to the output shaft (71); a fixed meshing ring (152) which is coaxially sleeved outside the output shaft (71) and spaced apart from the movable meshing ring (151) in the axial direction of the output shaft (71); the fixed meshing ring (152) is coaxially fixed to the thread gauge (2); the fixed meshing ring (152) and the output shaft (71) can rotate relative to each other and are relatively fixed to the output shaft (71) in the axial direction of the output shaft (71); and end faces of the fixed meshing ring (152) and the movable meshing ring (151) which are close to each other are provided with end face teeth which match each other; A second elastic member (153) connects the movable meshing ring (151) and the output shaft (71). When the movable meshing ring (151) moves axially away from the fixed meshing ring (152), the second elastic member (153) overcomes the elastic force of the second elastic member (153). The second elastic member (153) is used to keep the movable meshing ring (151) and the fixed meshing ring (152) in a meshing state, and is suitable for overcoming the elastic force of the second elastic member (153) when the rotation of the thread gauge (2) is blocked, so that the movable meshing ring (151) and the fixed meshing ring (152) are disengaged.

5. The automatic thread detection device according to claim 4, characterized in that: The thread gauge (2) is connected to the fixed engagement ring (152) via a floating connector (16).

6. The automatic thread detection device according to claim 1, characterized in that: The base (1) is provided with a clamping jaw (17), the clamping jaw (17) and the thread gauge (2) are spaced apart in the axial direction of the thread gauge (2), the clamping jaw (17) is used to clamp the measured part, when the measured part is clamped by the clamping jaw (17), the thread axis is coaxial with the thread gauge (2), and the measured part is restricted from moving along the radial direction of the thread and rotating around the axis.

7. The automatic thread detection device according to claim 1, characterized in that; The base (1) is provided with two first travel switches (8), the two first travel switches (8) are arranged at intervals along the axial direction of the thread gauge (2), and the connecting seat (4) is connected with a triggering member (9) for triggering the first travel switch (8). When the first travel switch (8) is triggered, a signal is sent to the control system, and when the control system receives the signal from the first travel switch (8), the control system controls the first driving member (6) to stop running.

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