Large-diameter external thread rapid detection mechanism

Abstract

A large-diameter external thread rapid detection mechanism disclosed by the present invention comprises a main body support, and an upper measuring head assembly and a lower measuring head assembly which are respectively arranged at two end portions of the main body support, the upper measuring head assembly comprises a dial indicator, an outer cylinder, a sliding inner rod and an upper measuring head, and the sliding inner rod is arranged in an inner cavity of the outer cylinder. The upper measuring head is connected with the sliding inner rod through internal and external threads; the dial indicator and the upper measuring head are respectively arranged at two ends of the outer cylinder; the lower measuring head assembly comprises a lower measuring head, a lower measuring head small supporting frame and a lower measuring head large supporting bracket, the lower measuring head is connected with the lower measuring head small supporting frame through a lower measuring head fastening bolt, and the lower measuring head small supporting frame is connected with the main body bracket through the lower measuring head large supporting bracket. According to the invention, the production cost is saved, the maintenance cost is reduced, the detection is convenient, and online and offline detection of large-diameter external threads can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of detection equipment and relates to a large-diameter external thread rapid detection mechanism. Background Art

[0002] For the measurement of external threads, small thread ring gauge detection is the most common, most widely used, and most important external thread detection solution at home and abroad. The advantage is that it can comprehensively detect the conformity of external threads, especially small threads, and the operation is also very convenient. However, for large-diameter external threads (diameter greater than Φ200mm or even larger), the use of thread ring gauge detection has the following defects:

[0003] 1. The production cost is high. Each ring gauge (one for the through end and one for the stop end) can only be used to detect one nominal diameter model thread. Therefore, the ring gauge is a special inspection tool. If there are two nominal diameter models of threads, four ring gauges are required, especially for medium and large threads. The cost of a single set is high, and there are certain skill requirements for the operator when using it.

[0004] 2. High maintenance costs. For large diameter external threads, each thread needs to be inspected, which is time-consuming and laborious. Generally, non-standard thread ring gauges are made of stainless steel. The ring gauges themselves are heavy, which is laborious to inspect manually, and parts are prone to collision during use. Thread ring gauges have wear problems during normal use, and the loss of non-standard thread ring gauges is more serious for batch products. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a large-diameter external thread rapid detection mechanism.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A large-diameter external thread rapid detection mechanism comprises a main body support (14), an upper probe assembly and a lower probe assembly respectively arranged at two ends of the main body support (14),

[0008] The upper probe assembly comprises a dial indicator (1), an outer cylinder (3), a sliding inner rod (17) and an upper probe (8); the sliding inner rod (17) is arranged in the inner cavity of the outer cylinder (3); the upper probe (8) is connected to the sliding inner rod (17) via internal and external threads; the dial indicator (1) and the upper probe (8) are respectively arranged at two ends of the outer cylinder (3);

[0009] The lower probe assembly comprises a lower probe (10), a lower probe small support frame (12), and a lower probe large support frame (13); the lower probe (10) is connected to the lower probe small support frame (12) via a lower probe fastening bolt (11); and the lower probe small support frame (12) is connected to the main frame (14) via the lower probe large support frame (13).

[0010] As a preferred embodiment, the dial gauge (1) is clamped by a dial gauge clamping core (16) and a dial gauge clamping core plugging cover (2), and the dial gauge clamping core plugging cover (2) is connected to the outer cylinder (3) by means of threads.

[0011] As a preferred embodiment, the outer cylinder (3) passes through the outer cylinder clamping core (18), and the outer cylinder clamping core (18) is fixed by the outer cylinder clamping core fixing bolts (5).

[0012] Further preferably, the outer cylinder clamping core (18) is provided with a light hole, the light hole is connected to an outer cylinder guide pin (19), and the outer cylinder guide pin (19) is arranged in a guide groove of the outer cylinder (3) and can slide in the guide groove.

[0013] Further preferably, the outer cylinder clamping core (18) is connected to the outer cylinder locking nut (4) via a tapered thread.

[0014] As a preferred embodiment, the outer cylinder (3) is also connected to a sliding inner rod blocking cover (6) which is locked by a calibrated locking screw (7).

[0015] As a preferred embodiment, the small support frame (12) of the lower measuring head and the large support frame (13) of the lower measuring head are clearance-matched, and the two can rotate relative to each other.

[0016] The present invention has the following advantages:

[0017] The present invention saves production costs, reduces maintenance costs, is convenient for detection, and can realize online and offline detection of large-diameter external threads. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the upper probe assembly;

[0020] Figure 3 It is a three-dimensional diagram of a dial indicator;

[0021] Figure 4 This is a three-dimensional diagram of the dial indicator clamping core plug cover;

[0022] Figure 5 It is a stereoscopic diagram of the clamping core of the dial indicator;

[0023] Figure 6 It is a stereogram of the outer cylinder;

[0024] Figure 7 It is a three-dimensional diagram of the sliding inner rod;

[0025] Figure 8 It is a stereoscopic view of the outer tube locking nut;

[0026] Fig. 9 It is a stereoscopic diagram of the outer cylinder clamping core;

[0027] Fig.10 is a stereoscopic view of the guide pin of the outer cylinder;

[0028] Fig.11 A three-dimensional diagram of the fixing bolts of the outer cylinder clamping core;

[0029] Fig.12 It is a three-dimensional diagram of the sliding inner rod plug cover;

[0030] Fig.13 A stereogram of the calibrated locking screw;

[0031] Fig.14 This is a stereogram of the upper probe;

[0032] Fig.15 This is a stereogram of the lower probe;

[0033] Fig.16 This is a three-dimensional diagram of the fastening bolts of the lower probe;

[0034] Fig.17 This is a three-dimensional diagram of the small support frame for the lower probe;

[0035] Fig.18 This is a three-dimensional diagram of the large support bracket for the lower probe;

[0036] Fig.19 This is a three-dimensional diagram of the fastening bolts of the large support bracket of the lower measuring head;

[0037] Fig. 20 This is a three-dimensional diagram of the main bracket. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] Embodiment 1:

[0041] A large diameter external thread rapid detection mechanism comprises a main body support 14, an upper probe assembly and a lower probe assembly respectively arranged at two ends of the main body support 14,

[0042] The upper probe assembly includes a dial indicator 1, an outer tube 3, a sliding inner rod 17 and an upper probe 8. The sliding inner rod 17 is arranged in the inner cavity of the outer tube 3. The upper probe 8 is connected to the sliding inner rod 17 through internal and external threads. The dial indicator 1 and the upper probe 8 are respectively arranged at both ends of the outer tube 3.

[0043] The lower probe assembly includes a lower probe 10, a small lower probe support frame 12, and a large lower probe support frame 13. The lower probe 10 is connected to the small lower probe support frame 12 via a lower probe fastening bolt 11, and the small lower probe support frame 12 is connected to the main support 14 via the large lower probe support frame 13.

[0044] The dial gauge 1 is clamped by the dial gauge clamping core 16 and the dial gauge clamping core plug cover 2, and the dial gauge clamping core plug cover 2 is connected to the outer cylinder 3 by threads. The outer cylinder 3 passes through the outer cylinder clamping core 18, and the outer cylinder clamping core 18 is fixed by the outer cylinder clamping core fixing bolt 5. The outer cylinder clamping core 18 is provided with a light hole, and the light hole is connected with an outer cylinder guide pin 19. The outer cylinder guide pin 19 is arranged in the guide groove of the outer cylinder 3 and can slide in the guide groove. The outer cylinder clamping core 18 is connected to the outer cylinder locking nut 4 through a tapered thread. The outer cylinder 3 is also connected with a sliding inner rod plug cover 6, which is locked by a calibrated locking screw 7. The small support frame 12 of the lower probe is clearance-matched with the large support frame 13 of the lower probe, and the two can rotate relative to each other.

[0045] The workflow of this embodiment is as follows:

[0046] Step 1: Assemble the lower probe onto the small support frame of the lower probe;

[0047] Step 2: Assemble the components assembled in step 1 onto the large support bracket of the lower probe;

[0048] Step 3: Assemble the components assembled in step 2 onto the main bracket;

[0049] Step 4: Install the spring, the sliding inner rod plug cover and the upper side head into the sliding inner rod in sequence;

[0050] Step 5: Install the sliding inner rod assembly assembled in step 4 into the outer cylinder;

[0051] Step 6: Install the outer tube clamping core and the outer tube locking nut into the main bracket in sequence;

[0052] Step 7: Install the outer cylinder assembly of step 5 into the outer cylinder clamping core;

[0053] Step 8: Install the dial gauge clamping core, dial gauge clamping core plugging cover, and dial gauge into the outer cylinder in sequence;

[0054] Step 9: Adjust the upper and lower probes, calibrate the dial indicator using the nominal major diameter of the external thread to be tested, calibrate to zero and lock the sliding inner rod, and place the testing mechanism in the designated position for standby use;

[0055] Step 10: After the external thread to be inspected is processed, use the inspection mechanism adjusted in step 9 to inspect the middle diameter of the external thread and obtain the dial indicator reading;

[0056] Step 11: Calculate the external thread middle diameter using the formula using the dial indicator reading. If the calculation result is within the external thread middle diameter tolerance range, it is considered qualified.

[0057] When testing another large-diameter external thread part, repeat steps nine, ten, and eleven to complete the measurement of the external thread.

[0058] Embodiment 2:

[0059] The dial gauge 1 is clamped by the dial gauge clamping core 16, and the clamping force comes from the locking force of the dial gauge clamping core plug 2. The dial gauge clamping core plug 2 is connected to the outer cylinder 3 by threads, and the spring 20 is installed in the sliding inner rod 17, and the sliding inner rod 17 penetrates the outer cylinder 3, and the two are clearance fit. The outer cylinder 3 passes through the outer cylinder clamping core 18, and the two are clearance fit. The outer cylinder clamping core 18 is assembled to the outer cylinder 3, and the outer cylinder clamping core fixing bolt 5 is used to fix the outer cylinder clamping core 18 to prevent it from sliding along the main bracket 14. The outer cylinder guide pin 19 passes through the light hole on the outer cylinder clamping core 18 to prevent the outer cylinder clamping core 18 from rotating around the outer cylinder 3. The outer cylinder guide pin 19 can slide in the guide groove of the outer cylinder 3. The outer cylinder locking nut 4 is connected to the outer cylinder clamping core 18 by a tapered thread, and as the clamping force increases, it plays the role of clamping the outer cylinder 3. The sliding inner rod plug cover 6 is connected to the outer tube 3 by threads, which plays a role in preventing the sliding inner rod 17 from moving back and forth. It is locked by the calibration locking screw 7. The upper probe 8 is connected to the sliding inner rod 17 by internal and external threads. The lower probe large support bracket 13 is assembled to the main support 14 and fixed by the lower probe large support bracket fastening bolt 15. The lower probe small support bracket 12 is installed on the lower probe large support bracket 13. The two are clearance fit, which is convenient for rotation between the two. The lower probe 10 is connected to the lower probe small support bracket 12 by the lower probe fastening bolt 11.

[0060] like Fig.18 As shown, two threaded holes are reserved on the large support bracket of the lower probe, which are used to fix it to the main support bracket 14 using the large support bracket fastening bolts 15 of the lower probe. The other two branch end faces respectively have two light holes, and one end of the small support bracket 12 of the lower probe is inserted into them. The lower probe 10 is fastened to the small support bracket 12 of the lower probe by the lower probe fastening bolts 11. The lower probe 10 is designed to be two, which are distributed left and right along the thread axis of the part when in use, so that the operator can fix the detection tool and the part conveniently.

[0061] like Fig. 20 As shown, three waist-shaped through holes are opened on the main frame 14 to reduce weight and facilitate hand-held use. A groove and a hole are processed on one side of the main frame 14 for installing the lower probe large support frame 13; a light hole and two threaded holes are left on the other side for installing the outer cylinder clamping core 18.

[0062] like Figure 6 As shown, one end of the outer cylinder 3 is threaded, and the dial gauge clamping core plug cover 2 is connected to the outer cylinder 3 through a thread. A light hole is left in the center of the outer cylinder 3, and the sliding inner rod 17 passes through the outer cylinder light hole, and the outer cylinder clamping core 18 passes through the outer cylinder 3 and can clamp it. The other end of the outer cylinder 3 is threaded, and the sliding inner rod plug cover 6 is connected to the outer cylinder 3 through a thread to prevent the sliding inner rod 17 from sliding.

[0063] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A large diameter external thread rapid detection mechanism, characterized in that: It comprises a main body support (14), an upper probe assembly and a lower probe assembly respectively arranged at two ends of the main body support (14), The upper probe assembly comprises a dial indicator (1), an outer cylinder (3), a sliding inner rod (17) and an upper probe (8); the sliding inner rod (17) is arranged in the inner cavity of the outer cylinder (3); the upper probe (8) is connected to the sliding inner rod (17) via internal and external threads; the dial indicator (1) and the upper probe (8) are respectively arranged at two ends of the outer cylinder (3); The lower probe assembly comprises a lower probe (10), a lower probe small support frame (12), and a lower probe large support frame (13); the lower probe (10) is connected to the lower probe small support frame (12) via a lower probe fastening bolt (11); and the lower probe small support frame (12) is connected to the main frame (14) via the lower probe large support frame (13).

2. A large diameter external thread rapid detection mechanism according to claim 1, characterized in that: The dial gauge (1) is clamped by a dial gauge clamping core (16) and a dial gauge clamping core plugging cover (2), and the dial gauge clamping core plugging cover (2) is connected to the outer cylinder (3) by means of threads.

3. A large diameter external thread rapid detection mechanism according to claim 1, characterized in that: The outer cylinder (3) passes through the outer cylinder clamping core (18), and the outer cylinder clamping core (18) is fixed by the outer cylinder clamping core fixing bolts (5).

4. A large diameter external thread rapid detection mechanism according to claim 3, characterized in that: The outer cylinder clamping core (18) is provided with a light hole, and the light hole is connected to an outer cylinder guide pin (19). The outer cylinder guide pin (19) is arranged in a guide groove of the outer cylinder (3) and can slide in the guide groove.

5. A large diameter external thread rapid detection mechanism according to claim 3, characterized in that: The outer cylinder clamping core (18) is connected to the outer cylinder locking nut (4) via a tapered thread.

6. A large diameter external thread rapid detection mechanism according to claim 1, characterized in that: The outer cylinder (3) is also connected to a sliding inner rod blocking cover (6) which is locked by a calibrated locking screw (7).

7. A large diameter external thread rapid detection mechanism according to claim 1, characterized in that: The small support frame (12) of the lower measuring head and the large support frame (13) of the lower measuring head are clearance-matched, and the two can rotate relative to each other.

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