Thread depth measuring mechanism

Abstract

The utility model relates to the technical field of measuring mechanisms, in particular to a mechanism for measuring thread depth, which comprises a quick-change connector for mounting a thread measuring head, a protective shell for mounting a magnetic sensor, and a driving piece arranged in the protective shell in a sliding manner, the driving piece is used for being matched with a thread measuring head to drive a quick-change connector to be screwed in, and the magnet is installed in the protection shell and matched with the magnetic sensor to detect the moving distance of the driving piece. According to the utility model, the quick-change connector for the standard thread go gauge is adopted to install the thread measuring head, so that an operator only needs to pull out the thread measuring head to complete the dismounting operation of the thread measuring head, and when the thread depth measuring mechanism works, the driving motor stops rotating after the torque of the driving motor reaches a set value; the magnetic sensor reads the moving distance of the rotating shaft to obtain the thread depth.

Description

Technical Field

[0001] This utility model relates to the field of measuring mechanism technology, and in particular to a mechanism for measuring thread depth. Background Technology

[0002] Sampling inspection is required during the production process of workpieces in order to scrap unqualified workpieces in a timely manner. Among them, thread hole inspection device is a device that is frequently used in sampling inspection.

[0003] In existing technologies, most inspections are done manually. The inspector needs to find the thread probe corresponding to the threaded hole being measured, screw the thread probe into the threaded hole, and judge whether the threaded hole depth is qualified by the length of the thread probe exposed. However, it is impossible to accurately determine the specific thread depth value. Moreover, since the thread probe is generally threaded on the measuring device, and the depth of the threaded holes on a part is not uniform, the thread probe needs to be changed frequently when measuring a threaded hole. However, the threaded installation and disassembly of the thread probe is inconvenient. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the prior art of being unable to accurately determine the specific depth value of a thread and the inconvenience of installing and disassembling the thread probe using a threaded method, and to propose a mechanism for measuring thread depth.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mechanism for measuring thread depth, the thread depth measuring mechanism comprising:

[0007] Quick-change connectors for mounting threaded probes and protective housings for mounting magnetic sensors;

[0008] A drive component is slidably disposed in the protective shell, the drive component being used to cooperate with the threaded probe to drive the quick-change connector to screw in;

[0009] A magnet installed in the protective housing, in conjunction with the magnetic sensor, detects the movement distance of the drive component.

[0010] Preferably, the protective shell consists of an outer protective shell and an inner protective shell, the outer protective shell being formed by rotating and splicing a first outer shell and a second outer shell, and the magnet being mounted on the inner protective shell.

[0011] Preferably, the driving component includes:

[0012] Drive motor for connecting coupling

[0013] A rotating shaft is mounted on the quick-connect coupling, the rotating shaft is located in the inner protective shell, and the drive motor is connected to the rotating shaft through the coupling;

[0014] End cover arranged at both ends of the rotating shaft.

[0015] Preferably, the driving motor is provided with a speed reducer, the shaft coupling is composed of a hollow cylinder and two arc-shaped plates, one of the arc-shaped plates is connected with the output end of the speed reducer, the other arc-shaped plate is connected with the hollow cylinder, and the two arc-shaped plates abut against each other.

[0016] Preferably, a spring is fixedly connected to the speed reducer, and an end of the spring away from the speed reducer abuts against the hollow cylinder.

[0017] Preferably, a sealing ring is arranged between the end cover and the rotating shaft.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The utility model discloses a quick-change joint is used for installing the thread measuring head, so that the operator only needs to pull out the thread measuring head to complete the dismounting operation of the thread measuring head, the driving motor torque reaches the set value and stops rotating when the thread depth measuring mechanism works, the magnetic sensor reads the rotating shaft moving distance to obtain the thread depth. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structural schematic view of a thread depth measuring mechanism is provided for the utility model;

[0021] Figure 2 A driving member, a thread measuring head and a quick-change joint connection structure schematic view are provided for the utility model;

[0022] Figure 3 A sectional view of the utility model is provided. Figure 1

[0023] In the drawings:

[0024] 1, thread measuring head;

[0025] 2, quick-change joint;

[0026] 3, magnetic sensor;

[0027] 4, protective shell;

[0028] 5, driving member; 501, shaft coupling; 5011, hollow cylinder; 5012, arc-shaped plate; 502, driving motor; 503, rotating shaft; 504, end cover; 505, spring;

[0029] 6, magnet;

[0030] 7, speed reducer. ​DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0032] With reference to Figures 1-3 A measuring screw thread depth mechanism, the measuring screw thread depth mechanism comprises:

[0033] The quick-change connector 2 for installing the screw thread probe 1 and the protective shell 4 for installing the magnetic sensor 3, it is to be explained that the quick-change connector 2 is a standard screw thread gauge quick-change connector, and the mounting mode and the operation mode are both prior art known technologies, so no further description is made, the protective shell 4 is composed of an outer protective shell and an inner protective shell, and the outer protective shell is composed of a first shell and a second shell, so that the outer protective shell is telescopic.

[0034] The driving member 5 is slidably arranged in the protective shell 4, and the driving member 5 is used to drive the quick-change connector 2 to rotate into the screw thread probe 1, and the driving member 5 comprises:

[0035] The driving motor 502 is used to connect the shaft coupling 501, and the driving motor 502 is provided with a speed reducer 7, so as to reduce the rotating speed of the output end of the driving motor 502, the shaft coupling 501 is composed of a hollow cylinder 5011 and two arc-shaped plates 5012, one of the arc-shaped plates 5012 is connected with the output end of the speed reducer 7, the other arc-shaped plate 5012 is connected with the hollow cylinder 5011, and the two arc-shaped plates 5012 are movably abutted, so that the shaft coupling 501 is telescopic, and when one of the arc-shaped plates 5012 rotates, the other arc-shaped plate 5012 is driven to rotate, the speed reducer 7 is fixedly connected with a spring 505, one end of the spring 505 away from the speed reducer 7 movably abuts against the hollow cylinder 5011, it is to be explained that the initial state of the spring 505 is the contraction state, so that when the shaft coupling 501 moves, the acting force on the spring 505 is reduced, at this time, the spring 505 tends to move to the initial state, and provides a forward thrust for the shaft coupling 501, so as to assist the forward movement of the screw thread probe 1;

[0036] The rotating shaft 503 is installed on the quick-change connector 2, the rotating shaft 503 is located in the inner protective shell, and the driving motor 502 is connected with the rotating shaft 503 through the shaft coupling 501.

[0037] The end cover 504 is arranged at the front and rear ends of the rotating shaft 503, and a sealing ring is arranged between the end cover 504 and the rotating shaft 503, so as to ensure the sealing property of the inner protective shell.

[0038] The magnet 6 installed in the protective shell 4 is installed on the inner protective shell, and the magnet 6 cooperates with the magnetic sensor 3 to detect the moving distance of the driving member 5; when the rotating shaft 503 moves, the position distance between the rotating shaft 503 and the magnet 6 changes, so that the magnetic field is affected and changes, and is detected by the magnetic sensor 3; by monitoring the output signal change of the magnetic sensor 3, and stopping the rotation of the driving motor 502 after the torque of the driving motor 502 reaches the set value, the magnetic sensor 3 reads the moving distance of the rotating shaft 503 to obtain the thread depth.

[0039] The function principle of the utility model can be described by the following operation mode:

[0040] The thread measuring head 1 is aligned with the thread hole to be measured, the driving motor 502 is started, the driving motor 502 reduces the rotating speed of the output end of the driving motor 502 through the speed reducer 7, so as to drive one of the arc-shaped plates 5012 to rotate, the other arc-shaped plate 5012 drives the hollow cylinder 5011 to rotate under the abutment of the arc-shaped plate 5012, the hollow cylinder 5011 drives the rotating shaft 503 to rotate, the rotating shaft 503 drives the quick-change connector 2 to rotate, the quick-change connector 2 drives the thread measuring head 1 to rotate, at this time, the first shell is separated from the second shell, the spring 505 is not under pressure and tends to move to the initial state, so as to provide forward force for the rotating shaft 503, and the driving motor 502 stops rotating when the torque reaches the set value during work, and the magnetic sensor 3 reads the moving distance of the rotating shaft 503 to obtain the thread depth.

[0041] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all of them should be covered in the protection scope of the utility model.

Claims

1. A thread depth measuring mechanism comprising, The measuring thread depth mechanism comprises: A quick-change joint (2) for mounting a thread measuring head (1) and a protective shell (4) for mounting a magnetic sensor (3); A driving member (5) slidingly arranged in the protective shell (4) and used for driving the quick-change joint (2) to screw in in cooperation with the thread measuring head (1); A magnet (6) mounted in the protective shell (4) and used for detecting the moving distance of the driving member (5) in cooperation with the magnetic sensor (3).

2. A mechanism for measuring the depth of a thread according to claim 1, wherein, The protective shell (4) comprises an outer protective shell and an inner protective shell, the outer protective shell is formed by rotating and splicing a first shell and a second shell, and the magnet (6) is mounted on the inner protective shell.

3. A mechanism for measuring the depth of a thread according to claim 2, wherein, The driving member (5) comprises: A driving motor (502) for connecting a shaft coupling (501) A rotating shaft (503) mounted on the quick-change joint (2), the rotating shaft (503) is located in the inner protective shell, and the driving motor (502) is connected to the rotating shaft (503) through the shaft coupling (501); End covers (504) arranged at both ends of the rotating shaft (503).

4. A mechanism for measuring the depth of a thread according to claim 3, wherein, The driving motor (502) is provided with a speed reducer (7), the shaft coupling (501) is composed of a hollow cylinder (5011) and two arc-shaped plates (5012), one of the arc-shaped plates (5012) is connected to the output end of the speed reducer (7), the other arc-shaped plate (5012) is connected to the hollow cylinder (5011), and the two arc-shaped plates (5012) are movably abutted.

5. A mechanism for measuring the depth of a thread according to claim 4, wherein, The speed reducer (7) is fixedly connected with a spring (505), and one end of the spring (505) away from the speed reducer (7) movably abuts against the hollow cylinder (5011).

6. A mechanism for measuring the depth of a thread according to claim 5, wherein, A sealing ring is arranged between the end cover (504) and the rotating shaft (503).

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