Detection device for detecting qualification of internal thread of workpiece
By designing the clamping and driving mechanisms, combining V-groove positioning and linear module linkage, and adopting a 'displacement-torque' composite detection mode, the problems of low efficiency and insufficient accuracy in traditional internal thread detection are solved, achieving a compact structure and high-efficiency detection for internal thread detection equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional internal thread inspection suffers from drawbacks such as low inspection efficiency, high labor intensity, susceptibility to subjective factors, complex structure of automated equipment, insufficient positioning accuracy, and inability to achieve rapid multi-station inspection.
The design incorporates a clamping and driving mechanism, combined with V-groove positioning and linear module linkage, to achieve rapid and accurate transfer of workpieces between the go and no-go gauge detection positions. It adopts a 'displacement-torque' composite detection mode, using photoelectric sensors and servo motors to monitor axial displacement and rotational resistance, thus achieving dual detection.
This invention achieves a compact structure for internal thread testing equipment, improves testing efficiency, and ensures both accuracy and speed of testing.
Smart Images
Figure CN224080871U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical testing technology, and in particular to a testing device for testing the conformity of the internal threads of a workpiece. Background Technology
[0002] Traditional internal thread inspection often relies on manual operation of go / no-go gauges, which suffers from low inspection efficiency, high labor intensity, and susceptibility to subjective factors. Existing automated inspection equipment generally suffers from defects such as complex structure, insufficient positioning accuracy, and inability to achieve rapid multi-station inspection. Utility Model Content
[0003] In order to make the internal thread rod testing equipment more compact and improve its testing efficiency, this application provides a testing device for testing the conformity of the internal thread of a workpiece.
[0004] The testing device for detecting the conformity of internal threads in a workpiece provided in this application adopts the following technical solution:
[0005] A testing device for detecting the conformity of internal threads of a workpiece includes a frame, a go gauge, and a no-go gauge. The frame has a first testing port and a second testing port for the go gauge and no-go gauge to pass through, respectively. The frame is provided with a clamping mechanism for clamping the workpiece and transferring it from the first testing port to the second testing port. The frame is also provided with a driving mechanism for driving the go gauge or no-go gauge to move while detecting whether the internal threads of the workpiece are conforming. There are two sets of driving mechanisms, and the two sets of driving mechanisms are arranged one-to-one with the go gauge and the no-go gauge.
[0006] Preferably, the clamping mechanism includes a linear module, a first connecting plate, a first guide rail, a first slider, a mounting plate, a fixed clamping block, a movable clamping block, and a first pushing cylinder. The first guide rail is connected to the frame, and two first guide rails are provided on the frame. The first slider is slidably disposed on the first guide rail. The mounting plate is connected between the two first sliders. The mounting plate has a third inspection port for the passage of go gauges and no-go gauges. The fixed clamping block is connected to the mounting plate. The first pushing cylinder is connected to the mounting plate. The piston rod of the first pushing cylinder is disposed in the direction toward the fixed clamping block. The movable clamping block is connected to the piston rod of the first pushing cylinder. V-grooves for clamping workpieces are provided on the opposite side walls of the fixed clamping block and the movable clamping block. The linear module is mounted on the frame, and the first connecting plate is connected between the movable seat of the linear module and the mounting plate.
[0007] Preferably, the driving mechanism includes a second push cylinder, a connecting rod, a connecting block, a second guide rail, a second slider, a servo motor, a square rod, a square hole sliding sleeve, a square hole tube, a photoelectric sensor, and a baffle. A second connecting plate is connected to the frame, and the second push cylinder is connected to the second connecting plate. The second push cylinder is arranged vertically. The connecting rod is coaxially connected to the second push cylinder via a coupling. The connecting block is disposed on the connecting rod, and an elastic buffer assembly is disposed between the connecting rod and the connecting block. The servo motor is mounted on the frame, and the square rod is coaxially connected to the output shaft of the servo motor via a coupling. The square hole sliding sleeve is sleeved on the square rod. The square-hole tube is fixedly connected to the square-hole sliding sleeve on the outside of the rod. The square-hole tube and the square-hole sliding sleeve are coaxially arranged. The go gauge or no-go gauge is coaxially connected to the square-hole tube through a coupling. The second guide rail is connected to the frame and is arranged along the height direction of the frame. The second slider is slidably arranged on the second guide rail. The square-hole sliding sleeve is connected to the second slider. The square-hole sliding sleeve is connected to the connecting block. Two photoelectric sensors are installed on the frame. Both photoelectric sensors are located on one side of the second guide rail. The two photoelectric sensors on the same side are arranged vertically. The baffle is connected to the square-hole sliding sleeve and passes through the photoelectric sensor.
[0008] Preferably, the elastic buffer assembly includes a linear bearing, a fixed sleeve, and a buffer spring. The linear bearing is connected to the connecting block, the connecting rod is connected inside the linear bearing, the fixed sleeve is connected to the connecting rod, and there is one fixed sleeve at each end of the connecting rod. The linear bearing is located between the two fixed sleeves, and the buffer spring is spring-sleeved outside the connecting rod. The buffer spring is located between the connecting rod and the fixed sleeve, with one end of the buffer spring abutting against the end of the fixed sleeve and the other end abutting against the linear bearing.
[0009] In summary, this application includes the following beneficial technical effects:
[0010] This utility model provides a testing device for detecting the conformity of internal threads on workpieces. Through the V-groove positioning of the clamping mechanism and the linkage design of the linear module, the workpiece can be quickly and accurately transferred between the go gauge and no-go gauge detection positions. Dual detection can be completed in a single clamping. Furthermore, it adopts a "displacement-torque" composite detection mode. When detecting with the go gauge, it combines axial displacement (photoelectric sensor) and rotational resistance (servo motor torque). When detecting with the no-go gauge, it establishes a composite criterion of displacement and torque. This achieves the effect of making the internal thread rod detection equipment compact and improving its detection efficiency. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the testing device used to detect the conformity of the internal thread of a workpiece in the embodiments of this application;
[0012] Figure 2 This is a schematic diagram illustrating the drive mechanism in the embodiments of this application;
[0013] Figure 3 yes Figure 2 Enlarged view of point A in the middle;
[0014] Figure 4 This is a schematic diagram illustrating the square rod in an embodiment of this application.
[0015] Explanation of reference numerals in the attached drawings: 100, frame; 101, second connecting plate; 200, go gauge; 300, no-go gauge; 400, clamping mechanism; 401, linear module; 402, first connecting plate; 403, first guide rail; 404, first slider; 405, mounting plate; 406, fixed clamping block; 407, movable clamping block; 408, first pushing cylinder; 500, drive mechanism; 501, second pushing cylinder; 502, connecting rod; 503, connecting block; 504, second guide rail; 505, second slider; 506, servo motor; 507, square rod; 508, square hole sliding sleeve; 509, square hole tube; 510, photoelectric sensor; 511, baffle; 600, elastic buffer assembly; 601, linear bearing; 602, fixed sleeve; 603, buffer spring. Detailed Implementation
[0016] To enable those skilled in the art to better understand the present invention, the solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or specific orientation structure and operation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0018] This application discloses a testing device for detecting the conformity of internal threads in a workpiece. (Refer to...) Figure 1 , Figure 2 , Figure 3 and Figure 4 The testing device for detecting the conformity of the internal threads of a workpiece includes a frame 100, a go gauge 200, and a no-go gauge 300. The frame 100 has a first testing port and a second testing port for the go gauge 200 and the no-go gauge 300 to pass through, respectively. The frame 100 is provided with a clamping mechanism 400 for clamping the workpiece and transferring it from the first testing port to the second testing port. The frame 100 is provided with a drive mechanism 500 for driving the go gauge 200 or the no-go gauge 300 to move while detecting whether the internal threads of the workpiece are conforming. There are two sets of drive mechanisms 500, and the two sets of drive mechanisms 500 are set one-to-one with the go gauge 200 and the no-go gauge 300.
[0019] The clamping mechanism 400 includes a linear module 401, a first connecting plate 402, a first guide rail 403, a first slider 404, a mounting plate 405, a fixed clamping block 406, a movable clamping block 407, and a first pushing cylinder 408. The first guide rail 403 is connected to the frame 100, and two first guide rails 403 are provided on the frame 100. The first slider 404 is slidably disposed on the first guide rail 403. The mounting plate 405 is connected between the two first sliders 404, and the mounting plate 405 has a third opening for the passage of a go gauge 200 and a no-go gauge 300. The detection port has a fixed clamping block 406 connected to the mounting plate 405. A first pushing cylinder 408 is connected to the mounting plate 405. The piston rod of the first pushing cylinder 408 is set in the direction towards the fixed clamping block 406. A movable clamping block 407 is connected to the piston rod of the first pushing cylinder 408. V-shaped grooves for clamping workpieces are opened on the opposite side walls of the fixed clamping block 406 and the movable clamping block 407. A linear module 401 is installed on the frame 100. A first connecting plate 402 is connected between the movable seat of the linear module 401 and the mounting plate 405.
[0020] Through the V-groove positioning in the clamping mechanism 400 and the linkage design of the linear module 401, the workpiece can be quickly and accurately transferred between the go gauge 200 inspection position and the no-go gauge 300 inspection position, and dual inspection can be completed in a single clamping.
[0021] The drive mechanism 500 includes a second push cylinder 501, a connecting rod 502, a connecting block 503, a second guide rail 504, a second slider 505, a servo motor 506, a square rod 507, a square hole sliding sleeve 508, a square hole tube 509, a photoelectric sensor 510, and a baffle 511. A second connecting plate 101 is connected to the frame 100. The second push cylinder 501 is connected to the second connecting plate 101 and is arranged vertically. The connecting rod 502 is coaxially connected to the second push cylinder 501 via a coupling. The connecting block 503 is disposed on the connecting rod 502. An elastic buffer assembly 600 is disposed between the connecting rod 502 and the connecting block 503. The servo motor 506 is mounted on the frame 100. The square rod 507 is coaxially connected to the output shaft of the servo motor 506 via a coupling. The square hole sliding sleeve 508 is fitted. A square-hole tube 509 is fixedly connected to a square-hole sliding sleeve 508 outside a square rod 507. The square-hole tube 509 and the square-hole sliding sleeve 508 are coaxially arranged. A go gauge 200 or a no-go gauge 300 is coaxially connected to the square-hole tube 509 through a coupling. A second guide rail 504 is connected to the frame 100 and is arranged along the height direction of the frame 100. A second slider 505 is slidably arranged on the second guide rail 504. The square-hole sliding sleeve 508 is connected to the second slider 505. The square-hole sliding sleeve 508 is connected to the connecting block 503. Two photoelectric sensors 510 are installed on the frame 100. Both photoelectric sensors 510 are located on one side of the second guide rail 504. The two photoelectric sensors 510 on the same side are arranged vertically. A baffle 511 is connected to the square-hole sliding sleeve 508 and passes through the photoelectric sensor 510.
[0022] The "displacement-torque" composite detection mode is adopted. When the go gauge 200 is used for detection, it combines axial displacement (photoelectric sensor 510) and rotational resistance (servo motor 506 torque). When the stop gauge 300 is used for detection, a composite criterion of displacement and torque is established.
[0023] The elastic buffer assembly 600 includes a linear bearing 601, a fixed sleeve 602, and a buffer spring 603. The linear bearing 601 is connected to the connecting block 503, the connecting rod 502 is connected inside the linear bearing 601, and the fixed sleeve 602 is connected to the connecting rod 502. The fixed sleeve 602 has one at each end of the connecting rod 502. The linear bearing 601 is located between the two fixed sleeves 602. The buffer spring 603 is spring-sleeved outside the connecting rod 502 and is located between the connecting rod 502 and the fixed sleeve 602. One end of the buffer spring 603 abuts against the end of the fixed sleeve 602, and the other end abuts against the linear bearing 601.
[0024] The elastic buffer assembly 600, through the synergistic action of the linear bearing 601 and the buffer spring 603, provides axial floating compensation during the screwing in of the go gauge 200 or the no-go gauge 300, effectively avoiding damage caused by rigid contact of the threaded part.
[0025] The implementation principle of a testing device for detecting the conformity of internal threads of a workpiece according to an embodiment of this application is as follows: workpiece clamping stage: the first push cylinder 408 drives the movable clamping block 407 to close with the fixed clamping block 406, and the workpiece axis is self-centered through the V-groove. The linear module 401 drives the mounting plate 405 to move along the first guide rail 403 to the first testing station.
[0026] During the inspection stage of the go gauge 200: The drive mechanism 500 below the go gauge 200, the second push cylinder 501 drives the connecting block 503 and the parts connected to the connecting block 503 to move upward. The servo motor 506 rotates at low speed, driving the square rod 507 and the go gauge 200 on the square rod 507 to rotate. When the baffle 511 triggers the photoelectric sensor 510 below, the end of the go gauge 200 contacts the end face of the workpiece.
[0027] During continuous screwing in: the compression of the buffer spring 603 provides axial floating compensation, and the servo motor 506 monitors the torque value in real time.
[0028] Qualification criteria: The baffle 511 reaches the upper photoelectric sensor 510 (the screw-in depth meets the standard) and the maximum torque is less than the set value.
[0029] Workpiece transfer stage: The linear module 401 drives the clamping mechanism 400 to move along the guide rail, moving the workpiece from the first inspection port to the second inspection port.
[0030] During the inspection stage of the stop gauge 300: The drive mechanism 500 below the stop gauge 300, the second push cylinder 501 drives the connecting block 503 and the parts connected to the connecting block 503 to move upward. The servo motor 506 rotates at low speed to drive the square rod 507 and the stop gauge 300 on the square rod 507 to rotate. When the baffle 511 triggers the photoelectric sensor 510 below, the end of the stop gauge 300 contacts the end face of the workpiece.
[0031] During continuous screwing in: the compression of the buffer spring 603 provides axial floating compensation, and the servo motor 506 monitors the torque value in real time.
[0032] Two qualifying modes are triggered:
[0033] a) Mode 1: The baffle 511 reaches the upper photoelectric sensor 510 (the screw-in depth meets the standard) and the real-time torque is greater than or equal to the set value;
[0034] b) Mode 2: The upper photoelectric sensor 510 is not reached (the starting end of the thread groove is different, so the stop gauge 300 can be screwed into one or two threads) but the torque suddenly increases beyond the threshold (indicating that the stop gauge 300 is stuck in the effective screwing section).
[0035] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A testing device for detecting the conformity of internal threads in a workpiece, characterized in that: The device includes a frame (100), a go gauge (200), and a no-go gauge (300). The frame (100) has a first inspection port and a second inspection port for the go gauge (200) and the no-go gauge (300) to pass through, respectively. The frame (100) is provided with a clamping mechanism (400) for clamping the workpiece and transferring the workpiece from the first inspection port to the second inspection port. The frame (100) is provided with a drive mechanism (500) for driving the go gauge (200) or the no-go gauge (300) to move while detecting whether the internal thread of the workpiece is qualified. There are two sets of drive mechanisms (500), and the two sets of drive mechanisms (500) are arranged one-to-one with the go gauge (200) and the no-go gauge (300).
2. The testing device for detecting the conformity of internal threads in a workpiece according to claim 1, characterized in that: The clamping mechanism (400) includes a linear module (401), a first connecting plate (402), a first guide rail (403), a first slider (404), a mounting plate (405), a fixed clamping block (406), a movable clamping block (407), and a first pushing cylinder (408). The first guide rail (403) is connected to the frame (100), and two first guide rails (403) are provided on the frame (100). The first slider (404) is slidably disposed on the first guide rail (403). The mounting plate (405) is connected between the two first sliders (404), and the mounting plate (405) is provided with a go gauge (200) and a no-go gauge (300) for passage. The fixed clamping block (406) is connected to the mounting plate (405) through the third inspection port. The first pushing cylinder (408) is connected to the mounting plate (405). The piston rod of the first pushing cylinder (408) is arranged in the direction toward the fixed clamping block (406). The movable clamping block (407) is connected to the piston rod of the first pushing cylinder (408). V-shaped grooves for clamping workpieces are opened on the opposite side walls of the fixed clamping block (406) and the movable clamping block (407). The linear module (401) is installed on the frame (100). The first connecting plate (402) is connected between the movable seat of the linear module (401) and the mounting plate (405).
3. The testing device for detecting the conformity of internal threads in a workpiece according to claim 1, characterized in that: The driving mechanism (500) includes a second push cylinder (501), a connecting rod (502), a connecting block (503), a second guide rail (504), a second slider (505), a servo motor (506), a square rod (507), a square hole sliding sleeve (508), a square hole tube (509), a photoelectric sensor (510), and a baffle (511). A second connecting plate (101) is connected to the frame (100), and the second push cylinder (501) is connected to the second connecting plate (101). The push cylinder (501) is arranged vertically. The connecting rod (502) is coaxially connected to the second push cylinder (501) via a coupling. The connecting block (503) is arranged on the connecting rod (502). An elastic buffer assembly (600) is arranged between the connecting rod (502) and the connecting block (503). The servo motor (506) is mounted on the frame (100). The square rod (507) is coaxially connected to the output shaft of the servo motor (506) via a coupling. The square hole sliding sleeve (508) is fitted with... Located outside the square rod (507), the square-hole tube (509) is fixedly connected to the square-hole sliding sleeve (508). The square-hole tube (509) and the square-hole sliding sleeve (508) are coaxially arranged. The go gauge (200) or no-go gauge (300) is coaxially connected to the square-hole tube (509) through a coupling. The second guide rail (504) is connected to the frame (100) and is arranged along the height direction of the frame (100). The second slider (505) is slidably arranged on the second guide rail (504). The square hole sliding sleeve (508) is connected to the second slider (505). The square hole sliding sleeve (508) is connected to the connecting block (503). The photoelectric sensor (510) is mounted on the frame (100) and there are two of them. The two photoelectric sensors (510) are located on one side of the second guide rail (504). The two photoelectric sensors (510) on the same side are arranged vertically. The baffle (511) is connected to the square hole sliding sleeve (508) and passes through the photoelectric sensor (510).
4. The testing device for detecting the conformity of internal threads in a workpiece according to claim 3, characterized in that: The elastic buffer assembly (600) includes a linear bearing (601), a fixed sleeve (602), and a buffer spring (603). The linear bearing (601) is connected to the connecting block (503), the connecting rod (502) is connected inside the linear bearing (601), and the fixed sleeve (602) is connected to the connecting rod (502). The fixed sleeve (602) is provided at both ends of the connecting rod (502). The linear bearing (601) is located between the two fixed sleeves (602). The buffer spring (603) is spring-sleeved outside the connecting rod (502). The buffer spring (603) is located between the connecting rod (502) and the fixed sleeve (602). One end of the buffer spring (603) abuts against the end of the fixed sleeve (602), and the other end abuts against the linear bearing (601).