A thread inspection machine

Abstract

This utility model relates to the field of thread inspection technology and discloses a thread inspection machine, including a frame and a mounting bracket mounted on the frame. An internal thread inspection head is connected to the bottom of the mounting bracket near one end of the frame, and an external thread inspection head is connected to the other end of the mounting bracket. Both the internal and external thread inspection heads are non-contact thread inspection devices. This thread inspection machine, through the cooperation of the external and internal thread inspection heads, can simultaneously inspect the internal and external threads at the end of a workpiece, significantly improving the inspection efficiency of internal and external thread structures.

Description

Technical Field

[0001] This utility model relates to the field of thread inspection technology, specifically a thread inspection machine. Background Technology

[0002] In automotive braking systems, the power output end of the air compressor crankshaft must ensure torque transmission and sealing, typically achieved through a specific thread structure. This structure not only requires high concentricity between the internal and external threads but also imposes strict standards on parameters such as thread depth and pitch. To ensure these critical parameters meet design requirements, the thread inspection process is particularly important; thread inspection methods mainly include using go / no-go gauges, coordinate measuring machines (CMMs), or vision inspection systems.

[0003] Patent CN215491420U discloses a thread inspection machine, including a clamping and positioning assembly and a thread inspection assembly. The clamping and positioning assembly includes a clamping part and a rotating part, with the rotating part connected to the clamping part. The clamping part has jaws that can open or close. The thread inspection assembly includes a fixed plate, a thread inspection head, a floating mechanism, and a driving mechanism. The floating mechanism includes a housing, a floating element, an elastic element, and a connecting element. The floating element is housed in the inner cavity of the housing and is configured to move on the inner wall of the housing. The floating element is connected to the thread inspection head and to the connecting element, which is connected to the driving mechanism. The connecting element is fitted with an elastic element. By cooperating with the floating element, the housing, and the elastic element, the machine automatically corrects minor deviations in the thread inspection head, enabling it to enter the threaded hole of the workpiece for inspection. This overcomes the frequent failure rate problem caused by the use of rigid joints in existing thread inspection machines.

[0004] However, the thread inspection machine in the above technology still has the following problems: In order to meet specific connection and functional requirements, the power output end of some crankshafts will adopt a combination structure in which internal threads (connecting spline sleeves) and external threads (fixing bearings) coexist. Most existing thread inspection machines are single inspection ends, and it is necessary to change the fixture to inspect the internal and external threads step by step, which leads to reduced efficiency and may introduce repeat positioning errors. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a thread inspection machine that improves the inspection efficiency of crankshaft output end threads.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a thread inspection machine, comprising a frame and a mounting bracket mounted on the frame, wherein an internal thread inspection head is connected to the bottom of the mounting bracket near one end of the frame, and an external thread inspection head is connected to the other end of the mounting bracket, wherein both the internal thread inspection head and the external thread inspection head are non-contact thread inspection heads.

[0007] Furthermore, an adjustment groove is provided through the top of the mounting bracket, and an adjustment support assembly is connected inside the adjustment groove. The external thread detection head is connected to the adjustment support assembly.

[0008] Furthermore, the adjustment support assembly includes an adjustment telescopic component and a mounting block. The mounting block is slidably connected to the adjustment groove. The adjustment telescopic component is fixedly connected to one end of the mounting frame away from the frame. The telescopic end of the adjustment telescopic component passes through the adjustment groove and is fixedly connected to the mounting block. The external thread detection head is connected to the bottom of the mounting block.

[0009] Furthermore, support grooves are provided on both sides of the adjustment groove, and support blocks are fixedly connected to both sides of the mounting block. The two support blocks are slidably connected to the two support grooves respectively.

[0010] Furthermore, a movable telescopic component is fixedly connected to the top of the mounting block. The telescopic end of the movable telescopic component extends vertically downward through the mounting block and connects to the external thread detection head. The telescopic end of the movable telescopic component is slidably connected to the mounting block.

[0011] Furthermore, the telescopic end of the movable telescopic component is fixedly connected to a misalignment rod, and the other end of the misalignment rod is fixedly connected to an external thread detection head.

[0012] Furthermore, a fixed telescopic component is fixedly connected to the top of the mounting bracket near one end of the frame. The telescopic end of the fixed telescopic component extends vertically downward through the mounting bracket and is fixedly connected to the internal thread detection head. The telescopic end of the fixed telescopic component is slidably connected to the mounting bracket.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This type of thread inspection machine, through the cooperation of an external thread inspection head and an internal thread inspection head, can simultaneously inspect the internal and external threads at the end of a workpiece, significantly improving the inspection efficiency of internal and external thread structures. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall connection structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the internal and external thread detection head and the mounting bracket of this utility model; Figure 3 Based on Figure 2 Exploded view of the connection structure; Figure 4 This is a schematic diagram of the connection structure of the external thread detection head of this utility model.

[0015] In the diagram: 1. Frame; 2. Mounting bracket; 3. Internal thread detection head; 4. External thread detection head; 5. Adjustment support assembly; 6. Moving telescopic component; 7. Fixed telescopic component; 51. Adjustment telescopic component; 52. Mounting block; 53. Support block; 61. Misalignment rod; 201. Adjustment groove; 202. Support groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Please see Figures 1 to 4 A thread inspection machine includes a frame 1 and a mounting bracket 2 mounted on the frame 1. An internal thread inspection head 3 is connected to the bottom of the mounting bracket 2 near one end of the frame 1, and an external thread inspection head 4 is connected to the other end of the mounting bracket 2. Both the internal thread inspection head 3 and the external thread inspection head 4 are non-contact thread inspection heads.

[0018] like Figures 1 to 4 As shown, the thread inspection machine of this utility model is structurally similar to existing thread inspection machines, such as the thread inspection machine disclosed in patent publication number CN215491420U. The main improvement of this utility model lies in improving the inspection efficiency of the thread inspection machine. Figures 1 to 4 As shown, in use, after the workpiece is fixed on the testing machine, the mounting bracket 2 can be adjusted via the frame 1, and the internal thread testing head 3 at the bottom of the mounting bracket 2 can be moved into the threaded hole of the workpiece. Simultaneously, the external thread testing head 4 is brought close to the external thread at the end of the workpiece, thus simultaneously completing the internal and external thread testing at the end of the workpiece. This eliminates the need for separate testing of the internal and external threads, significantly improving the thread testing efficiency at the end of the workpiece. Furthermore, both the internal thread testing head 3 and the external thread testing head 4 employ non-contact thread testing technologies, such as ultrasonic testing, optical non-contact scanning, and optical diffraction analysis. These technologies enable thread inspection to be completed without the inspection head directly contacting the thread, making it easier for the internal thread inspection head 3 and the external thread inspection head 4 to inspect the internal and external threads of the workpiece. It should be noted that the frame 1 can refer to the X-axis module, Y-axis module and Z-axis module in the reference document CN215491420U, and the mounting bracket 2 can be adjusted to any position on the plane above the fixed workpiece, thereby ensuring that the internal thread inspection head 3 can be smoothly moved into the internal thread hole of the workpiece to perform internal thread inspection. The specific adjustment process of the frame 1 to the mounting bracket 2 is not described in detail here.

[0019] like Figures 1 to 3As shown, an adjustment groove 201 is provided through the top of the mounting bracket 2. An adjustment support assembly 5 is connected inside the adjustment groove 201, and the external thread detection head 4 is connected to the adjustment support assembly 5. By adjusting the support assembly 5, the external thread detection head 4 can be moved closer to or further away from the internal thread detection head 3. When the internal thread detection head 3 is detecting the internal thread hole of the workpiece, the external thread detection head 4 can be adjusted to be closer to the external thread at the end of the workpiece, which can adapt to the detection of internal and external threads at the end of workpieces with different wall thicknesses.

[0020] like Figures 2 to 4 As shown, the adjusting support assembly 5 includes an adjusting telescopic component 51 and a mounting block 52. The mounting block 52 is slidably connected to the adjusting groove 201. The adjusting telescopic component 51 is fixedly connected to one end of the mounting frame 2 away from the frame 1. The telescopic end of the adjusting telescopic component 51 extends into the adjusting groove 201 and is then fixedly connected to the mounting block 52. The external thread detection head 4 is connected to the bottom of the mounting block 52. The adjusting telescopic component 51 can drive the mounting block 52 to reciprocate within the adjusting groove 201 at the end of the mounting frame 2, thereby causing the external thread detection head 4 to move closer to or further away from the internal thread detection head 3. The distance between the external thread detection head 4 and the internal thread detection head 3 can be flexibly adjusted to adapt to the measurement of internal thread holes in workpieces with different wall thicknesses.

[0021] like Figures 2 to 4 As shown, support grooves 202 are provided on both sides of the adjusting groove 201, and support blocks 53 are fixedly connected to both sides of the mounting block 52. The two support blocks 53 are slidably connected to the two support grooves 202 respectively. When the adjusting telescopic component 51 moves the mounting block 52 within the adjusting groove 201, the connection between the support blocks 53 and the support grooves 202 prevents the mounting block 52 from detaching from the adjusting groove 201, thus improving the stability of the mounting block 52's movement within the adjusting groove 201.

[0022] like Figures 1 to 4 As shown, a movable telescopic component 6 is fixedly connected to the top of the mounting block 52. The telescopic end of the movable telescopic component 6 extends vertically downward through the mounting block 52 and connects to the external thread detection head 4. The telescopic end of the movable telescopic component 6 is slidably connected to the mounting block 52. The movable telescopic component 6 can drive the external thread detection head 4 to move up and down at the bottom of the mounting block 52, thereby adapting to the external thread detection of different workpieces.

[0023] like Figures 1 to 4 As shown, the telescopic end of the movable telescopic component 6 is fixedly connected to a misalignment rod 61, and the other end of the misalignment rod 61 is fixedly connected to the external thread detection head 4. The misalignment rod 61 allows the external thread detection head 4 to be closer to the internal thread detection head 3, thereby enabling the detection of the external thread on the outer side of the internal thread hole of a thinner workpiece.

[0024] like Figures 1 to 4As shown, a fixed telescopic component 7 is fixedly connected to the top of the mounting bracket 2 near the end of the frame 1. The telescopic end of the fixed telescopic component 7 extends vertically downward through the mounting bracket 2 and is fixedly connected to the internal thread detection head 3. The telescopic end of the fixed telescopic component 7 is slidably connected to the mounting bracket 2. The fixed telescopic component 7 can drive the internal thread detection head 3 to move up and down at the bottom of the mounting bracket 2, so that the internal thread detection head 3 can be smoothly inserted into the internal thread hole of the workpiece, thereby smoothly performing internal thread detection.

[0025] It should be noted that the movable telescopic component 6, the fixed telescopic component 7, and the adjustable telescopic component 51 can all use electric actuators, which can precisely control the telescopic length.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A thread inspection machine, comprising a frame (1) and a mounting bracket (2) mounted on the frame (1), characterized in that: The mounting bracket (2) has an internal thread detection head (3) connected to the bottom of one end near the frame (1), and an external thread detection head (4) connected to the other end of the mounting bracket (2). Both the internal thread detection head (3) and the external thread detection head (4) are non-contact thread detection heads.

2. A thread inspection machine according to claim 1, characterized in that: An adjustment groove (201) is provided through the top of the mounting bracket (2), and an adjustment support assembly (5) is connected inside the adjustment groove (201). The external thread detection head (4) is connected to the adjustment support assembly (5).

3. A thread inspection machine according to claim 2, characterized in that: The adjustment support assembly (5) includes an adjustment telescopic component (51) and a mounting block (52). The mounting block (52) is slidably connected to the adjustment groove (201). The adjustment telescopic component (51) is fixedly connected to one end of the mounting frame (2) away from the frame (1). The telescopic end of the adjustment telescopic component (51) passes through the adjustment groove (201) and is fixedly connected to the mounting block (52). The external thread detection head (4) is connected to the bottom of the mounting block (52).

4. A thread inspection machine according to claim 3, characterized in that: The adjustment groove (201) has support grooves (202) on both sides, and the mounting block (52) has support blocks (53) fixedly connected to both sides. The two support blocks (53) are slidably connected to the two support grooves (202) respectively.

5. A thread inspection machine according to claim 3, wherein: The top of the mounting block (52) is fixedly connected to a movable telescopic component (6). The telescopic end of the movable telescopic component (6) extends vertically downward through the mounting block (52) and is connected to the external thread detection head (4). The telescopic end of the movable telescopic component (6) is slidably connected to the mounting block (52).

6. A thread inspection machine according to claim 5, characterized in that: The telescopic end of the movable telescopic component (6) is fixedly connected to a misaligned rod (61), and the other end of the misaligned rod (61) is fixedly connected to the external thread detection head (4).

7. A thread inspection machine according to claim 1, characterized in that: The mounting bracket (2) is fixedly connected to a fixed telescopic component (7) at the top of one end near the frame (1). The telescopic end of the fixed telescopic component (7) passes vertically downward through the mounting bracket (2) and is fixedly connected to the internal thread detection head (3). The telescopic end of the fixed telescopic component (7) is slidably connected to the mounting bracket (2).

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