Thread detection device

Abstract

The utility model relates to the field of precision manufacturing, and aims to provide a thread detection device, which comprises a first electric sliding rail and a second electric sliding rail, a posture adjusting mechanism is arranged on a sliding part of the first electric sliding rail, a clamping mechanism is connected onto the posture adjusting mechanism, and the clamping mechanism is connected with the second electric sliding rail. A multi-axis mechanical arm is installed on a sliding part of the second electric sliding rail, a first motor is fixedly arranged on the multi-axis mechanical arm, and a thread detection mechanism is connected to an output shaft of the first motor; the thread detection mechanism comprises a mounting plate, the front side of the mounting plate is connected with an output shaft of a first motor, the rear side of the mounting plate is provided with at least two groups of tooth gauge detectors, the detection end of one group of tooth gauge detectors is detachably connected with a go gauge detection head, and the detection end of the other group of tooth gauge detectors is detachably connected with a no-go gauge detection head. According to the utility model, the automatic detection of the threaded hole of the workpiece can be realized, the detection efficiency and precision are improved, and the stability and reliability of the detection process are ensured.

Description

Technical Field

[0001] This utility model relates to the field of precision manufacturing, specifically a thread detection device. Background Technology

[0002] In the field of precision manufacturing, machining deviations in the threaded holes of workpieces can affect assembly quality. For example, threaded holes that are too large can lead to loose fits, affecting product reliability and service life; threaded holes that are too small can cause assembly difficulties or even make installation impossible, requiring rework and thus increasing production costs. Therefore, the inspection of threaded hole dimensions is particularly important.

[0003] Currently, thread inspection mainly uses traditional go and no-go gauges. This involves screwing in a go gauge no larger than the threaded hole and a no-go gauge no smaller than the threaded hole to determine if the threaded hole meets assembly requirements. However, this method relies heavily on manual operation, resulting in low inspection efficiency and difficulty in meeting the needs of mass production. Furthermore, the torque required for manually screwing in the go and no-go gauges is difficult to standardize, leading to significant subjectivity and potential misjudgments due to improper operation, thus affecting the stability of the inspection. Utility Model Content

[0004] The purpose of this invention is to provide a thread detection device that can automatically detect threaded holes in workpieces, improve detection efficiency and accuracy, and ensure the stability and reliability of the detection process.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A thread detection device includes a first electric slide rail extending forward and backward and a second electric slide rail extending vertically. The second electric slide rail is installed in front of the first electric slide rail. An attitude adjustment mechanism is fixedly provided on the sliding part of the first electric slide rail. A clamping mechanism for clamping a workpiece is movably connected to the attitude adjustment mechanism. A multi-axis robotic arm is installed on the sliding part of the second electric slide rail. A first motor is fixedly provided on the execution part of the multi-axis robotic arm. A thread detection mechanism that cooperates with the clamping mechanism is fixedly connected to the output shaft of the first motor.

[0007] The thread detection mechanism includes a mounting plate. The front side of the mounting plate is fixedly connected to the output shaft of the first motor. At least two sets of thread gauge detectors are installed on the rear side of the mounting plate. The detection ends of the two sets of thread gauge detectors are arranged in opposite directions. One set of thread gauge detectors has a go gauge detection head that can be detachably connected to its detection end, while the other set of thread gauge detectors has a no-go gauge detection head that can be detachably connected to its detection end.

[0008] Compared with the prior art, the advantages of this utility model are:

[0009] 1. Through the cooperation of the first electric slide rail, the second electric slide rail, the multi-axis robotic arm, the first motor, the clamping mechanism and the thread detection mechanism, the automated detection of the threaded hole of the workpiece can be realized, which greatly improves the detection efficiency, reduces human error and improves the detection accuracy.

[0010] 2. By setting up a thread gauge detector, a GO gauge detection head, and a NO-GO gauge detection head, the GO and NO-GO gauge detection heads, driven by a through-shaft motor, engage with the threaded hole to be inspected, thereby determining whether the diameter of the threaded hole meets the requirements. When the GO gauge detection head can be smoothly screwed into the threaded hole, while the NO-GO gauge detection head cannot be screwed into the same threaded hole, it can be determined that the threaded hole is manufactured qualified. Furthermore, through the cooperation of the ball spline shaft assembly, the limit retaining ring, and the compression spring, the thread gauge detector can achieve buffering and reset during the inspection process, thereby effectively improving the inspection stability of the GO and NO-GO gauge detection heads. In addition, by setting up a first motor, after the GO gauge detection head completes the inspection, it can drive the mounting plate to rotate, so that the NO-GO gauge detection head enters the inspection position, thereby achieving continuous inspection and improving inspection efficiency.

[0011] 3. By setting up a second motor, a swing frame, and a third motor, the clamping mechanism can achieve two-axis displacement, allowing the workpiece to swing at multiple angles. This further adapts the thread detection mechanism to detect threaded holes in different positions, improving the equipment's adaptability and detection coverage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an embodiment of a thread detection device according to the present invention;

[0013] Figure 2 yes Figure 1 Top view of the structure;

[0014] Figure 3 This is a schematic diagram of the thread detection mechanism of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the dental gauge detector of this utility model;

[0016] Figure 5 yes Figure 4 Exploded view of the structure;

[0017] Figure 6 This is a structural cross-sectional view of the attitude adjustment mechanism of this utility model;

[0018] Figure 7 yes Figure 6 A three-dimensional structural diagram;

[0019] Figure 8 This is a rear side view of a partial structure of this utility model.

[0020] Labeling Explanation: 1 First Electric Slide Rail, 11 Lead Screw Linear Slide Rail, 12 Guide Rail, 13 Photoelectric Induction Groove, 14 Light-Shielding Plate, 2 Second Electric Slide Rail, 3 Attitude Adjustment Mechanism, 31 Fixed Frame, 32 Swing Frame, 33 Second Motor, 34 Third Motor, 35 First Synchronous Pulley, 36 Second Synchronous Pulley, 37 Synchronous Belt, 4 Clamping Mechanism, 41 Worktable, 42 Corner Pressing Cylinder, 43 Positioning Column, 5 Multi-Axis Robotic Arm, 6 First Motor, 7 Thread Detection Mechanism, 71 Mounting Plate, 72 Thread Gauge Detector, 721 Through-Shaft Motor, 7221 Spline Shaft, 7222 Ball Spline Nut, 723 Coupling, 724 Floating Reamer Head, 725 Limiting Ring, 726 Compression Spring, 727 Spring Cover, 73 Go Gauge Detection Head, 74 No-Go Gauge Detection Head. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0022] like Figure 1-8 The diagram shown is a schematic representation of an embodiment of a thread detection device provided by this utility model:

[0023] A thread detection device includes a first electric slide rail 1 extending forward and backward and a second electric slide rail 2 extending vertically. The second electric slide rail 2 is installed on the front side of the first electric slide rail 1. An attitude adjustment mechanism 3 is fixedly provided on the sliding part of the first electric slide rail 1. A clamping mechanism 4 for clamping a workpiece is movably connected to the attitude adjustment mechanism 3. A multi-axis robotic arm 5 is installed on the sliding part of the second electric slide rail 2. A first motor 6 is fixedly provided on the execution part of the multi-axis robotic arm 5. A thread detection mechanism 7 that cooperates with the clamping mechanism 4 is fixedly connected to the output shaft of the first motor 6.

[0024] The thread detection mechanism 7 includes a mounting plate 71. The front side of the mounting plate 71 is fixedly connected to the output shaft of the first motor 6. At least two sets of thread gauge detectors 72 are mounted on the rear side of the mounting plate 71. The detection ends of the two sets of thread gauge detectors 72 are arranged in opposite directions. A go gauge detection head 73 can be detachably connected to the detection end of one set of thread gauge detectors 72, while a no-go gauge detection head 74 can be detachably connected to the detection end of the other set of thread gauge detectors 72.

[0025] Specifically, the size of the go gauge inspection head 73 should be smaller than that of the no-go gauge inspection head 74. The go gauge inspection head 73 is preferably M12, and the no-go gauge inspection head 74 is preferably M14.

[0026] The tooth gauge detector 72 includes a through-shaft motor 721, a ball spline shaft assembly, a coupling 723, and a floating reamer head 724 for connecting the go gauge detection head 73 or the no-go gauge detection head 74.

[0027] Specifically, the floating reamer head 724 is existing technology. After the floating reamer head 724 is connected to the go gauge detection head 73 or the no-go gauge detection head 74, it allows the go gauge detection head 73 or the no-go gauge detection head 74 to adaptively float and compensate within a certain range, thereby better adapting to slight deviations in the threaded hole and improving the smoothness and accuracy of the inspection.

[0028] The ball spline shaft assembly includes a spline shaft 7221 and a ball spline nut 7222 sleeved on the spline shaft 7221. The spline shaft 7221 and the ball spline nut 7222 are inserted through the through shaft cavity of the through shaft motor 721, and the ball spline nut 7222 is connected to the drive part of the through shaft motor 721.

[0029] The splined shaft 7221 is fitted with a limiting retaining ring 725, two compression springs 726, and a spring cover 727. The spring cover 727 is fixedly closed on the upper end of the through shaft cavity. The two compression springs 726 are axially limited between the ball spline nut 7222 and the spring cover 727. The limiting retaining ring 725 is fixed on the splined shaft 7221 and located between the two compression springs 726. The limiting retaining ring 725 is in a limiting cooperation with the compression springs 726 on both sides.

[0030] Furthermore, the limiting retaining ring 725 and the spline shaft 7221 are tightly fitted together;

[0031] The two compression springs 726 are axially limited between the ball spline nut 7222 and the spring cover 72. That is, the top of the upper compression spring 726 is limited and engaged with the spring cover 727, and the bottom of the lower compression spring 726 is limited and engaged with the ball spline nut 7222. In this embodiment, the ball spline nut 7222 is fixedly connected to the drive part of the through shaft motor 721 through the connecting shaft, and the lower end of the lower compression spring 726 directly abuts against the connecting shaft.

[0032] One end of the coupling 723 is connected to the lower end of the spline shaft 7221, and the other end of the coupling 723 is connected to the floating reamer head 724.

[0033] The attitude adjustment mechanism 3 includes a fixed frame 31 and a swing frame 32. The fixed frame 31 is fixed on the sliding part of the first electric slide rail 1. The swing frame 32 is rotatably connected between the left and right side walls of the fixed frame 31. A second motor 33 is installed on the outer side wall of the fixed frame 31. The output shaft of the second motor 33 passes through the side wall of the fixed frame 31 and is connected to the swing frame 32. The output shaft of the second motor 33 extends to the left and right.

[0034] The clamping mechanism 4 is rotatably connected to the top side of the swing frame 32. A third motor 34, which is directly or indirectly driven by the clamping mechanism 4, is installed at the bottom of the swing frame 32. The output shaft of the third motor 34 extends vertically.

[0035] The output shaft of the third motor 34 is fitted with a first synchronous pulley 35, the bottom of the clamping mechanism 4 passes through the top side of the swing frame 32, and the bottom of the clamping mechanism 4 is also fitted with a second synchronous pulley 36. The first synchronous pulley 35 and the second synchronous pulley 36 are connected by a synchronous belt 37.

[0036] The first electric slide rail 1 includes a lead screw linear slide rail 11 and a guide rail 12 that are spaced apart on the left and right. One end of the attitude adjustment mechanism 3 is fixedly connected to the sliding part of the lead screw linear slide rail 11, and the other end is slidably connected to the guide rail 12.

[0037] The first electric slide rail 1 has photoelectric sensing grooves 13 at both its front and rear ends. The photoelectric sensing grooves 13 are used to sense the travel state of the sliding part of the first electric slide rail 1. A light-shielding plate 14 that cooperates with the photoelectric sensing grooves 13 is fixed on the bottom side of the sliding part of the first electric slide rail 1.

[0038] The clamping mechanism 4 includes a worktable 41 and several corner pressing cylinders 42. The bottom of the worktable 41 is rotatably connected to the attitude adjustment mechanism 3. Several positioning posts 43 are provided on the top side of the worktable 41, and the positioning posts 43 correspond one-to-one with the positioning holes of the external workpiece.

[0039] The corner-pressing cylinder 42 is installed on the top side of the worktable 41. The rocker arm of the corner-pressing cylinder 42 can clamp the workpiece on the worktable 41 by tightening it downward.

[0040] The tooth gauge detector 72 is provided in four sets, and the four sets of tooth gauge detectors 72 are arranged in pairs on the left and right sides of the mounting plate. In each pair, the detection ends of the two sets of tooth gauge detectors 72 are arranged in opposite directions, and a go gauge detection head 73 can be detachably connected to the detection end of one set, while a no-go gauge detection head 74 can be detachably connected to the detection end of the other set.

[0041] The working process of this utility model is roughly as follows:

[0042] The workpiece is placed on the clamping mechanism 4 at the initial position (i.e., the rear end of the first electric slide rail 1) by an external loading and unloading mechanism (e.g., a robotic arm), and the positioning hole on the workpiece is aligned with the positioning post 43 on the worktable 41. Then, the corner pressing cylinder 42 presses down on the workpiece, clamping it on the worktable 41. Subsequently, driven by the sliding part of the lead screw linear slide rail 11, the workpiece is moved to the detection position (i.e., the front end of the first electric slide rail 1). When it reaches the detection position, the light-shielding plate 14 blocks the groove of the photoelectric sensing groove 13 at the front end of the first electric slide rail 1, and the lead screw linear slide rail 11 stops moving.

[0043] Next, driven by the second electric slide rail 2 and the multi-axis robotic arm 5, the thread inspection mechanism 7 moves above the threaded hole to be inspected on the workpiece. Then, the thread gauge detector 72, equipped with a go gauge inspection head 73, starts, and the through-shaft motor 721 drives the go gauge inspection head 73 to rotate. During the rotation, the spline shaft 7221 moves downward along with the threaded go gauge inspection head 73. At this time, the limit retaining ring 725 on the spline shaft 7221 presses down the compression spring 726 on its lower side. After the inspection is completed, the go gauge inspection head 73 rotates in the opposite direction to exit the threaded hole, and the compression spring 726 on the lower side of the limit retaining ring 725 elastically resets, pushing the limit retaining ring 725 upward, thereby resetting the spline shaft 7221. During the reset process, the compression spring 726 on the upper side of the limit retaining ring 725 acts as a buffer.

[0044] Subsequently, the first motor 6 drives the mounting plate 71 to rotate, aligning the thread gauge detector 72, which is equipped with the no-go gauge detection head 74, with the same threaded hole. The through-shaft motor 721 drives the no-go gauge detection head 74 to rotate. If the no-go gauge detection head 74 cannot be screwed into the same threaded hole, the size of the threaded hole is qualified. During the inspection process, the posture adjustment mechanism 3 can adjust the position of the workpiece on the clamping mechanism 4, allowing the workpiece to swing at multiple angles, further adapting to the thread inspection mechanism 7 to inspect threaded holes at different positions.

[0045] After the workpiece is inspected, the clamping mechanism 4 returns to its initial position under the action of the sliding part of the first electric slide rail 1. The light-shielding plate 14 slides to block the groove of the photoelectric sensing groove 13 at the rear end of the first electric slide rail 1. The external loading and unloading mechanism takes away the inspected workpiece, thereby realizing automated inspection.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A thread detection device, comprising a first electric sliding rail (1) extending forward and backward and a second electric sliding rail (2) extending upward and downward, the second electric sliding rail (2) being mounted on the front side of the first electric sliding rail (1), characterized in that: a posture adjusting mechanism (3) is fixed on the sliding part of the first electric sliding rail (1), a clamping mechanism (4) for clamping a workpiece is movably connected to the posture adjusting mechanism (3), a multi-axis mechanical arm (5) is mounted on the sliding part of the second electric sliding rail (2), a first motor (6) is fixed on the execution part of the multi-axis mechanical arm (5), and a thread detection mechanism (7) matched with the clamping mechanism (4) is fixedly connected to the output shaft of the first motor (6). The thread detection mechanism (7) comprises a mounting plate (71), the front side of the mounting plate (71) is fixedly connected with the output shaft of the first motor (6), and at least two groups of tooth gauge detectors (72) are mounted on the rear side of the mounting plate (71); the detection ends of the two groups of tooth gauge detectors (72) are oppositely arranged, one detection end of one group of tooth gauge detectors (72) is detachably connected with a through gauge detection head (73), and the detection end of the other group of tooth gauge detectors (72) is detachably connected with a stop gauge detection head (74). The tooth gauge detector (72) comprises a through shaft motor (721), a ball spline shaft assembly, a shaft coupling (723), and a floating reamer head (724) for connecting the through gauge detection head (73) or the stop gauge detection head (74).

2. The thread inspection apparatus of claim 1, wherein: The ball spline shaft assembly comprises a spline shaft (7221) and a ball spline female (7222) sleeved on the spline shaft (7221); the spline shaft (7221) and the ball spline female (7222) are inserted through the through shaft cavity of the through shaft motor (721), and the ball spline female (7222) is connected with the driving part of the through shaft motor (721). A limiting block ring (725), two compression springs (726), and a spring cover (727) are sleeved on the spline shaft (7221); the spring cover (727) is fixedly covered on the upper end of the through shaft cavity, the two compression springs (726) are axially limited between the ball spline female (7222) and the spring cover (727); the limiting block ring (725) is fixed on the spline shaft (7221) and located between the two compression springs (726), and the limiting block ring (725) is limitedly matched with the two compression springs (726). One end of the shaft coupling (723) is connected with the lower end of the spline shaft (7221), and the other end of the shaft coupling (723) is connected with the floating reamer head (724). ​ 3. The thread inspection apparatus of claim 2, wherein: The posture adjusting mechanism (3) comprises a fixed frame (31) and a swing frame (32), the fixed frame (31) is fixed on the sliding part of the first electric sliding rail (1), the swing frame (32) is rotatably connected between the left and right side walls of the fixed frame (31), the outer side wall of the fixed frame (31) is provided with a second motor (33), the output shaft of the second motor (33) penetrates the side wall of the fixed frame (31) and is connected with the swing frame (32), and the output shaft of the second motor (33) extends leftward and rightward. The clamping mechanism (4) is rotatably connected to the top side of the swing frame (32), and the bottom of the swing frame (32) is provided with a third motor (34) which is directly or indirectly connected with the clamping mechanism (4), and the output shaft of the third motor (34) extends upward and downward.

4. The thread inspection apparatus of claim 3, wherein: A first synchronous wheel (35) is sleeved on the output shaft of the third motor (34), the clamping mechanism (4) penetrates the top side of the swing frame (32) from the bottom, and a second synchronous wheel (36) is also sleeved on the bottom of the clamping mechanism (4), and the first synchronous wheel (35) and the second synchronous wheel (36) are drivingly connected with a synchronous belt (37).

5. The thread inspection apparatus of claim 1, wherein: The first electric sliding rail (1) comprises left and right spaced screw linear rails (11) and guide rails (12), one end of the posture adjusting mechanism (3) is fixedly connected with the sliding part of the screw linear rail (11), and the other end is slidingly connected with the guide rail (12).

6. The thread inspection apparatus of claim 5, wherein: The front and rear ends of the first electric sliding rail (1) are provided with photoelectric sensing grooves (13), the photoelectric sensing grooves (13) are used for sensing the running state of the sliding part of the first electric sliding rail (1), and the bottom side of the sliding part of the first electric sliding rail (1) is fixedly provided with a light shielding baffle (14) matched with the photoelectric sensing groove (13).

7. The thread inspection apparatus of claim 1, wherein: The clamping mechanism (4) comprises a workbench (41) and a plurality of corner down pressure cylinders (42), the bottom of the workbench (41) is rotatably connected with the posture adjusting mechanism (3), the top side of the workbench (41) is provided with a plurality of positioning columns (43), and the plurality of positioning columns (43) are one-to-one corresponding to the positioning holes of the external workpiece. The corner down pressure cylinder (42) is installed on the top side of the workbench (41), and the rocker arm of the corner down pressure cylinder (42) is tightened downward to clamp the workpiece on the workbench (41).

8. The thread inspection apparatus of any one of claims 1 to 7, wherein: The tooth gauge detector (72) is provided with four groups, and the four groups of tooth gauge detectors (72) are arranged in pairs on the left and right sides of the mounting plate; in each pair, the detection ends of the two groups of tooth gauge detectors (72) are oppositely arranged, and the detection end of one group is detachably connected with a through gauge detection head (73), and the detection end of the other group is detachably connected with a stop gauge detection head (74).

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