A type of thread inner diameter gauge

Abstract

This utility model discloses a threaded inner diameter gauge, belonging to the field of mechanical technology. It includes a body, a cylindrical pin, a screw, a locking block I, and a locking block II. The body is a C-shaped plate with its opening facing downwards. Screw holes and pin holes are provided at both ends of the opening. Locking blocks I and II are both inverted right-angled trapezoids, each with a slot. One end of the body opening is inserted into the slot of locking block I, and the other end is inserted into locking block II. Locking block II is fixedly installed at one end of the body opening via a cylindrical pin, screw, screw hole, and pin hole, while locking block I is fixedly installed at the other end of the body opening via a cylindrical pin, screw, screw hole, and pin hole. This utility model mainly adopts a go-no-go gauge form, which can effectively determine whether the threaded inner diameter is qualified.

Description

Technical Field

[0001] This utility model relates to a threaded inner diameter gauge, belonging to the field of mechanical technology. Background Technology

[0002] A part on the artillery has a special thread with a unique shape. The measurable area of ​​the thread's inner diameter is only about 1.4 mm wide, and the thread is a helix on the circumference, making it impossible to measure with common measuring tools such as micrometers. This makes it impossible to determine whether the inner diameter of the thread is up to standard, failing to meet the dimensional measurement requirements and seriously affecting the production schedule. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides a thread inner diameter gauge, which mainly adopts the form of a go-no-go gauge and can effectively determine whether the thread inner diameter is qualified.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a threaded inner diameter gauge, including a body, a cylindrical pin, a screw, a locking block I and a locking block II. The body is a C-shaped plate with the opening facing downwards. Screw holes and pin holes are provided at both ends of the opening of the body. The locking blocks I and II are both inverted right-angled trapezoids. Each locking block I and locking block II is provided with a slot. One end of the opening of the body is inserted into the slot of the locking block I, and the other end of the opening of the body is inserted into the locking block II.

[0005] A locking block II is fixedly installed at one end of the opening of the main body through a cylindrical pin, screw, screw hole, and pin hole, and a locking block I is fixedly installed at the other end of the opening of the main body through a cylindrical pin, screw, screw hole, and pin hole.

[0006] Furthermore, between card block I and card block II, the main body is provided with several evenly spaced weight-reducing holes.

[0007] Furthermore, the screw holes and pin holes on one side of the body are arranged symmetrically with those on the other side.

[0008] Furthermore, the measuring parts of clamp I and clamp II are opposite each other. The measuring part of clamp I has one thread, and the thread profile is slightly narrower than that of the product being measured. The measuring part of clamp II has two threads, and the pitch of the two threads is the same as that of the thread being measured, and the thread profile is slightly narrower than that of the product being measured.

[0009] The beneficial effects of this utility model are: this utility model can realize the detection of special thread inner diameter, ensure the requirements of product size measurement, reduce processing costs, and has special properties; this gauge not only meets the usage requirements, but also has low manufacturing difficulty, reasonable structure, and is easy to operate, and has been effectively applied in production. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 yes Figure 1 The left view.

[0013] Figure 3 This is a schematic diagram of the main body of this utility model.

[0014] Figure 4 This is a top-section view of the card block I of this utility model during installation.

[0015] Figure 5 This is a top-section view of the card block II of this utility model during installation.

[0016] Figure 6 This is the front view of the card block I of this utility model.

[0017] Figure 7 yes Figure 6 A top-view cross-section.

[0018] Figure 8 This is the front view of the card block II of this utility model.

[0019] Figure 9 yes Figure 8 A top-view cross-section.

[0020] Numbering on the map: 1. Body, 101. Weight reduction hole, 102. Screw hole, 103. Pin hole, 2. Cylindrical pin, 3. Screw, 4. Locking block I, 5. Locking block II. Detailed Implementation

[0021] like Figure 1 As shown in Figure 9, a threaded inner diameter gauge includes a body 1, a cylindrical pin 2, a screw 3, a locking block I 4, and a locking block II 5. The body 1 is a C-shaped plate with its opening facing downwards. Screw holes 102 and pin holes 103 are provided at both ends of the opening of the body 1. The screw holes 102 and pin holes 103 on one side of the body 1 are symmetrically arranged with the screw holes 102 and pin holes 103 on the other side. The locking blocks I 4 and II 5 are both inverted right-angled trapezoids. Each locking block I 4 and II 5 has a slot. One end of the opening of the body 1 is inserted into the slot of the locking block I 4, and the other end of the opening of the body 1 is inserted into the locking block II 5.

[0022] A locking block II5 is fixedly installed at one end of the opening of the main body 1 through a cylindrical pin 2, a screw 3, a screw hole 102, and a pin hole 103. A locking block I4 is fixedly installed at the other end of the opening of the main body 1 through a cylindrical pin 2, a screw 3, a screw hole 102, and a pin hole 103.

[0023] Between the clamping blocks I4 and II5, the main body 1 is provided with several evenly spaced weight-reducing holes 101; the measuring parts of the clamping blocks I4 and II5 are opposite each other, and the measuring part of the clamping block I4 is provided with one thread, the thread profile of which is slightly narrower than that of the product being measured; the measuring part of the clamping block II5 is provided with two threads, the pitch of which is the same as that of the thread being measured, and the thread profile of which is slightly narrower than that of the product being measured.

[0024] This threaded inner diameter gauge mainly adopts the form of a go-no-go gauge. The body 1 is based on the outside micrometer and adopts a C-shaped structure. The material of the body 1 is T8A-GB / T1298-2008, and the heat treatment is 52~58HRC. To ensure durability, the non-use surfaces are oxidized. The weight reduction hole 101 on the body 1 makes operation more convenient. The measuring part of the clamping block I4 has a special thread shape, and the thread profile is slightly narrower than that of the product being measured. The measuring part of the clamping block II5 has two special thread shapes, the pitch is the same as that of the thread profile being measured, and the thread profile is slightly narrower than that of the product being measured.

[0025] How to use: 1) Hold the gauge body 1 and align the C-shaped opening perpendicular to the thread axis; 2) Align block I4 and block II5 with the inner diameter of the thread; 3) Push the gauge in perpendicular to the thread axis; 4) Check if the gauge dimensions pass; 5) When the GO gauge can pass through the outer diameter of the thread but the NO-GO gauge cannot, the thread inner diameter is within the acceptable range.

Claims

1. A threaded inner diameter gauge, characterized in that: Includes a body (1), a cylindrical pin (2), a screw (3), a locking block I (4) and a locking block II (5). The body (1) is a C-shaped plate with its opening facing downwards. Both ends of the opening of the body (1) are provided with screw holes (102) and pin holes (103). The locking blocks I (4) and II (5) are both inverted right-angled trapezoids. Both locking blocks I (4) and II (5) are provided with a slot. One end of the opening of the body (1) is inserted into the slot of the locking block I (4), and the other end of the opening of the body (1) is inserted into the locking block II (5). A locking block II (5) is fixedly installed at one end of the opening of the main body (1) through a cylindrical pin (2), a screw (3) and a screw hole (102) and a pin hole (103), and a locking block I (4) is fixedly installed at the other end of the opening of the main body (1) through a cylindrical pin (2), a screw (3) and a screw hole (102) and a pin hole (103).

2. A threaded inner diameter gauge according to claim 1, characterized in that: Between the card block I (4) and the card block II (5), the main body (1) is provided with several evenly spaced weight reduction holes (101).

3. A threaded inner diameter gauge according to claim 1, characterized in that: The screw holes (102) and pin holes (103) on one side of the body (1) are arranged symmetrically with the screw holes (102) and pin holes (103) on the other side.

4. A threaded inner diameter gauge according to claim 1, characterized in that: The measuring parts of the card block I (4) and the measuring parts of the card block II (5) are opposite each other. The measuring part of the card block I (4) has one thread, and the thread profile is narrower than that of the product being measured. The measuring part of the card block II (5) has two threads, and the pitch of the two threads is the same as that of the thread being measured. The thread profile is narrower than that of the product being measured.

Images