Universal external thread detection auxiliary tool
By designing a universal external thread detection auxiliary tool including a U-shaped solid needle holder and a stylus, the problem of detecting special tooth external threads in the prior art is solved, and higher measurement accuracy and operation simplicity are achieved.
Patent Information
- Application Number
- CN202421742019.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-23
AI Technical Summary
It is difficult for the prior art to effectively detect external threads of special teeth, especially British or American threads, and the lack of supporting standard measuring tools, resulting in low measurement accuracy and greatly affected by human factors.
A universal external thread detection auxiliary tool is designed, including a U-shaped solid needle holder, a compression bolt and three stylus. The stylus is fixed through special auxiliary tools, and the three-needle measurement method is used to simplify operation and reduce the influence of human factors.
Accurate detection of special tooth-type external threads is achieved, reducing the influence of operational complexity and human factors, and improving measurement accuracy.
Smart Images
Figure CN222849939U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a universal external thread detection auxiliary tool. Background Art
[0002] In the processing and inspection of external thread parts, the general inspection method is to use thread micrometers and thread ring gauges (T and Z). However, it is difficult to inspect some special threads (such as tooth angles of 55°, 30°, 45° and 29°) because most of these threads are British or American threads, not metric national standard series threads, and there are no matching standard measuring tools. For such special tooth-shaped threads, only the three-needle measurement method can be used, such as Figure 1 When using the three-needle measurement method, it is difficult for a single operator to use three detection needles and measuring tools at the same time, so it is difficult to promote and implement, and the measurement is greatly affected by human factors and has low accuracy. Summary of the invention
[0003] In order to solve the above technical problems, the utility model provides a universal external thread detection auxiliary tool which has a simple structure, low cost, can reduce the influence of human factors during measurement, and improve measurement accuracy.
[0004] The technical solution adopted by the utility model is: a universal external thread detection auxiliary tool, including a U-shaped fixed needle rack, a clamping bolt and three measuring pins; a group of long straight holes and a group of V-shaped holes are respectively provided on the two side plates of the U-shaped fixed needle rack, the long straight holes are located between the V-shaped holes and the bottom plate of the U-shaped fixed needle rack, and the length direction of the long straight holes is perpendicular to the bottom plate of the U-shaped fixed needle rack; the long straight holes on the two side plates are coaxial, and the V-shaped holes on the two side plates are coaxial; the V-shaped hole opening faces the bottom plate of the U-shaped fixed needle rack; a threaded hole is provided on the bottom plate of the U-shaped fixed needle rack, and the threaded hole and the two long straight holes are located in the same plane; a clamping bolt is provided in the threaded hole, a measuring pin is provided in one group of the long straight holes, and two measuring pins are provided in one group of the V-shaped holes.
[0005] Furthermore, the U-shaped needle holder is formed by bending a metal plate.
[0006] Further, the long straight hole passes through the apex of the V-shaped hole.
[0007] Compared with the prior art, the beneficial effects of the utility model are:
[0008] The utility model has a simple structure and low cost. When the utility model is used, two measuring pins are respectively placed in the upper V-shaped holes. After the two measuring pins are pressed into the two adjacent teeth of the external thread, the two measuring pins are pushed into the adjacent tooth grooves by gravity. The two measuring pins are pressed against the two tooth wall sides of the external thread. Then, the detection gauge pushes the other measuring pin into the long straight hole and presses against it, so that the nominal diameter of the thread can be detected. The operation is simple, the influence of human factors during measurement is reduced, and the measurement result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is the structural diagram for measuring threads using the three-needle method.
[0010] Figure 2 It is the front view of the utility model.
[0011] Figure 3 It is a left view of the utility model.
[0012] Figure 4 It is a three-dimensional diagram of the U-shaped needle fixing frame of the utility model. DETAILED DESCRIPTION
[0013] The utility model is further described below in conjunction with the accompanying drawings.
[0014] like Figure 2-4 As shown, the utility model comprises a U-shaped needle fixing frame 1, a clamping bolt 2 and three measuring needles 3; the U-shaped needle fixing frame is formed by bending a metal plate.
[0015] A group of long straight holes 11 and a group of V-shaped holes 12 are respectively provided on the two side panels of the U-shaped needle holder 1. The long straight holes 11 are located between the V-shaped holes 12 and the bottom plate of the U-shaped needle holder, and the length direction of the long straight holes 11 is perpendicular to the bottom plate of the U-shaped needle holder. The long straight holes 11 on the two side panels are coaxial, and the V-shaped holes 12 on the two side panels are coaxial; the V-shaped hole opening faces the bottom plate of the U-shaped needle holder 1, and the long straight hole 11 passes through the apex of the V-shaped hole 12. A threaded hole 13 is provided on the bottom plate of the U-shaped needle holder 1, and the threaded hole 13 and the two long straight holes 11 are located in the same plane. A clamping bolt 1 is provided in the threaded hole, a measuring pin is provided in a group of the long straight holes 11, and two measuring pins 3 are provided in a group of the V-shaped holes 12.
[0016] The principle of the utility model is: through the three-needle measurement method of fixing two measuring needles and another measuring needle at the opposite tooth by a special auxiliary tool, the processing operator only needs to operate the external diameter micrometer or vernier caliper to measure the outer circle points of the three needles. When the utility model is used, the two measuring needles 3 are respectively placed in the upper V-shaped hole 12, and after the two measuring needles 3 are pressed into the two adjacent teeth of the external thread, the two measuring needles 3 are pushed into the adjacent tooth grooves by gravity, and the two measuring needles 3 are closely attached to the two tooth walls of the external thread, and then the detection gauge pushes the other measuring needle into the long straight hole 11 and closes it, so that the nominal diameter M of the thread can be detected.
Claims
1. A universal external thread detection aid, characterized by: It includes a U-shaped fixed needle rack, a clamping bolt and three measuring pins; a group of long straight holes and a group of V-shaped holes are respectively provided on the two side plates of the U-shaped fixed needle rack, the long straight holes are located between the V-shaped holes and the bottom plate of the U-shaped fixed needle rack, and the length direction of the long straight holes is perpendicular to the bottom plate of the U-shaped fixed needle rack; the long straight holes on the two side plates are coaxial, and the V-shaped holes on the two side plates are coaxial; the opening of the V-shaped hole faces the bottom plate of the U-shaped fixed needle rack; a threaded hole is provided on the bottom plate of the U-shaped fixed needle rack, and the threaded hole and the two long straight holes are located in the same plane; a clamping bolt is provided in the threaded hole, a measuring pin is provided in one group of the long straight holes, and two measuring pins are provided in one group of the V-shaped holes.
2. The universal external thread detection aid according to claim 1 is characterized in that: The U-shaped needle holder is formed by bending a metal plate.
3. The universal external thread detection aid according to claim 1 is characterized in that: The long straight hole passes through the apex of the V-shaped hole.