Countersunk through hole rapid detection tool

Abstract

The utility model relates to a countersunk head through hole rapid detection tool, belonging to the countersunk head hole detection technology field, the detection tool comprises a seat body, a probe, a hanging sheet, a spring seat and a spring, the top surface and the bottom surface of the seat body are parallel to each other, the interior of the seat body is provided with a straight line through hole with a through top and bottom, the upper part of the straight line through hole is provided with a slide hole, and the lower part is provided with a spring cavity. The probe comprises a round straight rod, a circular truncated cone part arranged at the bottom of the round straight rod and a cylindrical part arranged at the bottom of the circular truncated cone part, the round straight rod is arranged in the sliding hole in a sliding mode, three judgment lines are vertically arranged at intervals close to the top of the round straight rod, the probe is hung on the top face of the seat body through the hanging piece, and the spring seat is fixedly arranged on the round straight rod above the circular truncated cone part. The spring sleeves the round straight rod, the top end of the spring supports the top wall of the spring cavity, and the bottom end of the spring supports the spring seat. The tool can be used for rapidly detecting whether the countersunk through hole of the part is qualified or not.

Description

A rapid inspection tool for countersunk through holes Technical Field

[0001] This utility model relates to the field of countersunk hole detection technology, and in particular to a rapid detection tool for countersunk through holes. Background Technology

[0002] As shown in Figure 1, when the countersunk through hole on a part 7 needs to be fully inspected on the assembly line to check whether the height of the conical surface of the countersunk hole 7.1 relative to the upper surface and the minimum diameter of the through hole 7.2 meet the dimensional tolerances on the drawing, conventional inspection methods are only applicable to sampling inspection and it is difficult to guarantee that the countersunk through holes on each part are qualified. Summary of the Invention

[0003] The present invention aims to provide a rapid inspection tool for countersunk holes, so as to facilitate full inspection of countersunk holes on all parts.

[0004] This utility model adopts the following technical solution: a rapid detection tool for countersunk through holes, comprising:

[0005] The base body has a top and bottom surfaces that are parallel to each other, so that the top surface becomes the indicator surface; the interior of the base body has a straight through hole that runs from top to bottom, the upper part of the straight through hole is a sliding hole and the lower part is a spring cavity, and the diameter of the sliding hole is smaller than the diameter of the spring cavity.

[0006] The probe includes a straight rod with a frustum at its bottom for inserting a countersunk hole into a part, and a cylindrical part at its bottom for inserting a through hole into a part. The straight rod slides within a sliding hole, and three judgment lines are positioned vertically near its top. These three judgment lines move up and down relative to the top surface of the base to mate with the top surface of the base and indicate whether the depth of the countersunk hole of the part is acceptable. The shape and specifications of the frustum are the same as those of the bolt nut, and the diameter of the cylindrical part is the same as the diameter of the bolt shank. The maximum diameter of the frustum is smaller than the diameter of the spring cavity, so that it can retract upward into the spring cavity when subjected to force.

[0007] Hanging plate; This hanging plate is fixed to the top of the probe and hangs the probe on the top surface of the base to prevent the probe from falling out of the straight through hole;

[0008] Spring seat; the spring seat is fixedly mounted on a straight rod above the frustum and located inside the spring cavity;

[0009] Spring: The spring is sleeved on a round straight rod, with its top end supporting the top wall of the spring cavity and its bottom end supporting the spring seat, so as to axially and elastically connect the probe to the seat body.

[0010] This utility model features a probe that can move up and down within the base. Near the top of the probe are three judgment lines that can move up and down relative to the top surface of the base. At the bottom of the probe is a frustum with the same shape and specifications as a bolt nut. At the bottom of the frustum is a cylindrical part with the same diameter as the bolt shank. In use, the minimum diameter of the through-hole of the part can be determined by whether the cylindrical part can be inserted into it. The depth of the frustum inserted into the countersunk hole of the part can be indicated by the positional relationship between the top surface of the base and the three judgment lines, thus determining whether the depth of the countersunk hole is acceptable. It is very quick and convenient to use, especially suitable for full inspection of parts on an assembly line to ensure that each part is qualified. Attached Figure Description

[0011] Figure 1 is a schematic diagram of a part with a countersunk through hole;

[0012] Figure 2 is an external view of the overall structure of this utility model;

[0013] Figure 3 is an exploded view of Figure 2;

[0014] Figure 4 is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 5 is a schematic diagram of the usage state of this utility model.

[0016] The parts marked in the diagram are: 1. Base, 1.1. Sliding hole, 1.2. Spring hole, 1.3. Process hole, 1.4. Groove, 2. Probe, 2.1. Straight rod, 2.11. Judgment line, 2.12. Screw hole, 2.13. Pin hole, 2.2. Frustum, 2.3. Cylindrical part, 3. Hanging piece, 4. Spring seat, 5. Spring, 6. Screw, 7. Part with countersunk through hole, 7.1. Countersunk hole of part, 7.2. Through hole of part. Detailed Implementation

[0017] To better understand this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0018] As shown in Figures 2 to 4, a rapid detection tool for countersunk through holes includes a base 1, a probe 2, a hanging plate 3, a spring seat 4, and a spring 5.

[0019] As shown in Figures 2 to 4, the base 1 is a cylinder with its top and bottom surfaces parallel to each other, so that its top surface becomes the indicating surface. The interior of the base 1 has a central shaft hole that runs through the top and bottom. The upper part of the central shaft hole is a sliding hole 1.1, and the lower part is a spring cavity 1.2. The diameter of the sliding hole 1.1 is smaller than the cavity diameter of the spring cavity 1.2. In order to save on the material cost of the base 1, four process windows 1.4 that connect to the spring cavities 1.2 are also evenly arranged around the perimeter of the base 1.

[0020] As shown in Figures 2 to 4, the probe 2 includes a straight rod 2.1. The bottom of the straight rod 2.1 is integrally formed with a frustum 2.2 for inserting countersunk holes 7.1 of parts. The bottom of the frustum 2.2 is integrally formed with a cylindrical part 2.3 for inserting through holes 7.2 of parts. The straight rod 2.1 is slidably disposed in the sliding hole 1.1. Near its top, there are three judgment lines that move up and down relative to the top surface of the base 1. All three judgment lines are annular grooves. The judgment line in the middle is set as the zero point line 2.11, the judgment line above is set as the upper tolerance line 2.12, and the judgment line below is set as the lower tolerance line 2.13. The distance between the upper tolerance line 2.12 and the lower tolerance line 2.13 and the zero point line 2.11 is set to 0.5 mm. As shown in Figures 2 and 4, both the frustum portion 2.2 and the cylindrical portion 2.3 protrude below the base 1. The shape and specifications of the frustum portion 2.2 are the same as those of the bolt nut, and the diameter of the cylindrical portion 2.3 is the same as the diameter of the bolt shank. The maximum diameter of the frustum portion 2.2 is smaller than the cavity diameter of the spring cavity 1.2, so that it can retract upward into the spring cavity 1.2 after being subjected to force.

[0021] As shown in Figures 2 to 4, the hanging piece 3 is a circular piece with a central hole and its outer diameter is larger than the diameter of the sliding hole 1.1. The hanging piece 3 is sleeved on a screw 6 through its central hole. The screw 6 is screwed into the screw hole 2.12 provided on the top surface of the round straight rod 2.1 to fix the hanging piece 3 to the top of the probe 2. The hanging piece 3 hangs the probe 2 on the top surface of the base 1 to prevent the probe 2 from falling out of the straight through hole.

[0022] As shown in Figures 2 to 4, the spring seat 4 is fixedly mounted on the straight rod 2.1 above the frustum 2.2 and located inside the spring cavity 1.2. The spring seat 4 is a pin, which is inserted into and fixed in the pin hole 2.13 radially provided on the straight rod 2.1, with its two ends protruding from the corresponding sides of the straight rod 2.1.

[0023] As shown in Figures 2 to 4, the spring 5 is sleeved on the round straight rod 2.1, with its top end supporting the top wall of the spring cavity 1.2 and its bottom end supporting the spring seat 4, so as to axially and elastically connect the probe 2 to the seat body 1.

[0024] As shown in Figures 1 to 5, during testing, the cylinder 2.3 can be aligned with the countersunk hole on the part 7 by holding the base 1. The base 1 is then pressed against the surface of the part 7. Under the action of the spring 5, the cylinder 2.3 and the frustum 2.2 can automatically insert into the countersunk hole in sequence. If the cylinder 2.3 cannot be inserted into the part's through hole 7.2, it indicates that the minimum diameter of the part's through hole 7.2 is unqualified, and there is no need to test the depth of the part's countersunk hole 7.1. If the cylindrical part 2.3 is successfully inserted into the through hole 7.2 of the part, the depth of the countersunk hole 7.1 of the part is then checked. At this time, the positional relationship between the top surface of the seat 1 and the three judgment lines can be observed. If the top surface of the seat 1 falls between the upper tolerance line 2.12 and the lower tolerance line 2.13, it indicates that the depth of the countersunk hole 7.1 of the part is qualified. If the top surface of the seat 1 falls above the upper tolerance line 2.12 or below the lower tolerance line 2.13, it indicates that the depth of the countersunk hole 7.1 of the part is unqualified. In order to facilitate the observation of the specific position of the three judgment lines, a groove 1.3 is provided on the top surface of the seat 1, which connects its side wall and the sliding hole 1.1 in a straight line. This groove 1.3 helps to expand the observation surface of the three judgment lines.

[0025] Since the countersunk holes are preset according to the bolts to be accommodated, the frustum portion 2.2 and cylindrical portion 2.3 on the probe 2 of this utility model need to be set in multiple ways according to different specifications of bolts (such as M4 to M8). When in use, the probe 2 is replaced to detect countersunk holes of different specifications, but one probe 2 can only detect one specification of countersunk hole.

Claims

1. A rapid detection tool for countersunk through holes, characterized in that, include: A base (1); the top and bottom surfaces of the base (1) are parallel to each other so that the top surface becomes the indicating surface; the interior of the base (1) is provided with a straight through hole that runs from top to bottom, the upper part of the straight through hole is provided as a sliding hole (1.1) and the lower part is provided as a spring cavity (1.2), the diameter of the sliding hole (1.1) is smaller than the cavity diameter of the spring cavity (1.2); a probe (2); the probe (2) includes a round straight rod (2.1), the bottom of the round straight rod (2.1) is provided with a frustum (2.2) for inserting countersunk holes of parts, and the bottom of the frustum (2.2) is provided with a cylindrical part (2.3) for inserting through holes of parts; the round straight rod (2.1) is provided with a frustum (2.2) for inserting countersunk holes of parts. 1) Sliding within the sliding hole (1.1), with three judgment lines (2.11) near its top, positioned vertically and vertically relative to the top surface of the base (1) for vertical movement; the frustum (2.2) and cylindrical (2.3) protrude below the base (1), the shape and specifications of the frustum (2.2) being the same as the shape and specifications of the bolt nut, and the diameter of the cylindrical (2.3) being the same as the diameter of the bolt shank; the maximum diameter of the frustum (2.2) being smaller than the cavity diameter of the spring cavity (1.2), so that it can retract upward into the spring cavity (1.2) after being subjected to force; the probe (2) includes a straight rod (2.1), the straight rod (2.1) of which... The bottom is provided with a frustum (2.2) for inserting into the countersunk hole of the part, and the bottom of the frustum (2.2) is provided with a cylindrical part (2.3) for inserting into the through hole of the part; a straight rod (2.1) slides in the sliding hole (1.1) and has three judgment lines (2.11) near its top for movement relative to the top surface of the seat (1); both the frustum (2.2) and the cylindrical part (2.3) protrude below the seat (1), the frustum (2.2) matches the countersunk hole of the part, and the cylindrical part (2.3) matches the through hole of the part; the maximum diameter of the frustum (2.2) is smaller than the diameter of the spring cavity (1.2), so that... When subjected to force, it can retract upward into the spring cavity (1.2); Hanging plate (3); The hanging plate (3) is fixed to the top of the probe (2) and hangs the probe (2) on the top surface of the base (1) to prevent the probe (2) from falling out of the straight through hole; Spring seat (4); The spring seat (4) is fixed on the round straight rod (2.1) above the frustum (2.2) and located in the spring cavity (1.2); Spring (5): The spring (5) is sleeved on the round straight rod (2.1) and its top end supports the top wall of the spring cavity (1.2) and its bottom end supports the spring seat (4) to axially and elastically connect the probe (2) to the base (1).

2. The rapid detection tool for countersunk through holes according to claim 1, characterized in that: The base (1) is a cylinder, and the straight through hole is its central shaft hole.

3. A rapid detection tool for countersunk through holes according to claim 1 or 2, characterized in that: The top surface of the base (1) is provided with a groove (1.3) for easy observation of the position of the three judgment lines (2.11). The groove (1.1) is directly connected to the sliding hole (1.1) and the side wall of the base (1).

4. The rapid detection tool for countersunk through holes according to claim 3, characterized in that: The side wall of the seat (1) is uniformly provided with four process windows (1.4) that pass through its outer side wall and spring cavity (1.2).

5. The rapid detection tool for countersunk through holes according to claim 1, characterized in that: The straight rod (2.1), the frustum (2.2), and the cylindrical part (2.3) are all integrally formed.

6. The rapid detection tool for countersunk through holes according to claim 1, characterized in that: All three judgment lines (2.11) are annular grooves.

7. The rapid detection tool for countersunk through holes according to claim 6, characterized in that: The judgment line in the middle is set as the zero line, the judgment line above is set as the upper tolerance line, and the judgment line below is set as the lower tolerance line.

8. A rapid detection tool for countersunk through holes according to claim 1 or 5, characterized in that: The distance between the upper and lower tolerance limits and the zero line is set to 0.5 mm.

9. A rapid detection tool for countersunk through holes according to claim 1, characterized in that: The hanging piece (3) is a circular piece with a central hole and its outer diameter is larger than the diameter of the sliding hole (1.1). The hanging piece (3) is sleeved on a screw (6) through its central hole. The screw (6) is screwed into the screw hole (2.12) on the top surface of the round straight rod (2.1) to fix the hanging piece (3) to the top of the probe (2).

10. A rapid detection tool for countersunk through holes according to claim 1, characterized in that: The spring seat (4) is a pin, which is inserted into the pin hole (2.13) radially arranged on the straight rod (2.1) and its two ends are exposed on the corresponding sides of the straight rod (2.1).

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