Error-proof testing fixture for center hole

Abstract

The utility model, which relates to the transmission shaft assembling field, discloses a center hole error-proofing testing fixture comprising a sleeve provided with an inner hole at the center; a profiling protrusion is arranged on the top of the profiling block, and the profiling block is arranged in the inner hole of the sleeve in the mode that the profiling protrusion faces upwards; one end of the to-be-tested part extends into the inner hole and is matched with the profiling bulge of the profiling block, and the other end of the to-be-tested part extends out of the sleeve and is provided with a lug hole; when the center hole of the to-be-detected part is a qualified center hole, the profiling projection completely enters the qualified center hole, so that the to-be-detected part is smoothly installed in the sleeve. When the center hole of the to-be-detected part is an unqualified center hole, the profiling protrusion interferes with the unqualified center hole, and the to-be-detected part is ejected out of the sleeve. When the position accuracy of the two lug holes of the fork part is detected, an unqualified central hole which is not opened due to the fracture of a drill bit can be identified.

Description

Technical Field

[0001] The utility model relates to the field of transmission shaft assembly, in particular to a center hole error-proofing inspection tool. Background Art

[0002] During the assembly process of the transmission shaft product, a large number of fork parts are used. When the existing sleeve inspection tool (1') detects the position of the ear holes (3') on both sides of the fork part (2'), the outer circle of the small end of the fork part is inserted into the inner hole of the sleeve inspection tool. When the center hole of the fork part is not drilled through due to the breakage of the drill bit during the center hole drilling process, an unqualified center hole is generated. It is impossible to identify the unqualified center hole while detecting the position of the two ear holes. Figure 1 、 2 shown. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a center hole error-proofing inspection tool, which can identify unqualified center holes that are not drilled through due to a broken drill bit when detecting the position of the two ear holes of a fork part.

[0004] The purpose of the utility model is to achieve the following technical solutions: This center hole error-proofing inspection tool includes:

[0005] A sleeve having an inner hole formed in the center thereof;

[0006] a profiling block having a profiling protrusion on its top, and the profiling block is placed in the inner hole of the sleeve with the profiling protrusion facing upward; and

[0007] One end of the part to be tested extends into the inner hole and cooperates with the profiling protrusion of the profiling block, and the other end extends out of the sleeve and has an ear hole. When the center hole of the part to be tested is a qualified center hole, the profiling protrusion completely enters the qualified center hole, allowing the part to be tested to be smoothly installed into the sleeve. When the center hole of the part to be tested is an unqualified center hole, the profiling protrusion interferes with the unqualified center hole, and the part to be tested is pushed out of the sleeve.

[0008] As a further technical solution, a positioning step is provided on the outer wall of the part to be measured for cooperating with the upper opening of the sleeve for positioning.

[0009] As a further technical solution, when the center hole of the part to be tested is a qualified center hole, the positioning step contacts and positions the upper end of the sleeve; when the center hole of the part to be tested is an unqualified center hole, the positioning step disengages from the upper end of the sleeve.

[0010] The beneficial effects of the utility model are:

[0011] 1. Add a profiling block inside the sleeve and set a profiling protrusion that matches the center hole to quickly identify unqualified center holes and play a role in error prevention;

[0012] 2. The sleeve structure is retained, which can detect the position of the two ear holes of the fork parts while identifying the unqualified center holes that are not drilled through due to drill bit breakage, making the detection more efficient and preventing the outflow of unqualified center hole parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of detecting a qualified center hole in the prior art.

[0014] Figure 2 This is a schematic diagram of the structure for detecting unqualified center holes in the prior art.

[0015] Figure 3 It is a structural schematic diagram of the sleeve in the utility model.

[0016] Figure 4 It is a structural schematic diagram of the profiling block in the utility model.

[0017] Figure 5 This is a schematic structural diagram of a qualified part to be tested in the present utility model.

[0018] Figure 6 It is a structural schematic diagram of an unqualified part to be tested in the present utility model.

[0019] Figure 7 It is a structural schematic diagram of the invention when detecting a qualified center hole.

[0020] Figure 8 This is a schematic diagram of the structure when detecting unqualified center holes in the utility model.

[0021] Description of reference numerals: sleeve inspection fixture 1', fork part 2', two side ear holes 3';

[0022] Sleeve 1, inner hole 11, profiling block 2, profiling protrusion 21, part to be tested 3, ear hole 31, qualified center hole 32, unqualified center hole 33, positioning step 34. DETAILED DESCRIPTION

[0023] The following is a detailed introduction to the present invention with reference to the accompanying drawings:

[0024] Example: As shown in the attached Figures 3 to 8 As shown, the center hole error-proofing inspection tool includes a sleeve 1, an inner hole 11, a profiling block 2, a profiling protrusion 21, a part to be tested 3, an ear hole 31, a qualified center hole 32, an unqualified center hole 33 and a positioning step 34.

[0025] Reference Attachment Figure 3 An inner hole 11 is provided in the center of the sleeve 1 to prevent the profiling block 2 from being cut off. Figure 4As shown, a profiling protrusion 21 is provided on the top of the profiling block 2, and the profiling protrusion 21 matches the shape of the qualified center hole 32. The profiling block 2 is placed in the inner hole 11 of the sleeve 1 with the profiling protrusion 21 facing upward.

[0026] One end of the part to be tested 3 extends into the inner hole 11 and matches with the profiling protrusion 21 of the profiling block 2, and the other end of the part to be tested 3 extends out of the sleeve 1 and is provided with a pair of ear holes 31. Figure 5 、 7 As shown, when the center hole of the part to be tested 3 is a qualified center hole 32 (i.e., it is fully opened), the contoured protrusion 21 completely enters the qualified center hole 32, so that the part to be tested 3 can be smoothly installed into the sleeve 1. Figure 6 、 8 As shown, when the center hole of the part to be tested 3 is an unqualified center hole 33 (ie, not drilled through completely), the contoured protrusion 21 and the unqualified center hole 33 will interfere with each other, pushing the part to be tested 3 out of the sleeve 1.

[0027] Furthermore, a positioning step 34 is provided on the outer wall of the part to be tested 3, which can be positioned in conjunction with the upper opening of the sleeve 1. When the center hole of the part to be tested 3 is a qualified center hole 32, the positioning step 34 contacts and positions the upper opening of the sleeve 1. When the center hole of the part to be tested 3 is an unqualified center hole 33, the positioning step 34 is separated from the upper opening of the sleeve 1. Figure 7 、 8 shown.

[0028] The working process of the present invention is as follows: when testing the position of the two ear holes 31 of the fork part (part to be tested 3), first place the profiling block 2 at the bottom of the sleeve 1, and then insert the outer diameter of the small end of the part to be tested 3 into the inner hole 11 of the sleeve 1. When testing the position of the two ear holes, if the center hole is qualified, the profiling protrusion 21 can normally enter the qualified center hole 32 without affecting normal testing. If the center hole is unqualified, the profiling protrusion 21 will interfere with the unperforated center hole (unqualified center hole 33), and the profiling protrusion 21 will not be able to normally enter the center hole of the part, which will lift the part to be tested 3, making it impossible to test the part normally. The unqualified center hole can be identified, playing a role in error prevention.

[0029] It is understandable that for those skilled in the art, any equivalent replacement or change of the technical solution and the concept of the utility model should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A center hole error proofing tool, characterized in that: include: A sleeve (1) having an inner hole (11) formed at its center; A profiling block (2) is provided with a profiling protrusion (21) on the top thereof, and the profiling block (2) is placed in the inner hole (11) of the sleeve (1) in a manner such that the profiling protrusion (21) faces upward; and The part to be tested (3) has one end extending into the inner hole (11) and cooperating with the profiling protrusion (21) of the profiling block (2), and the other end extending out of the sleeve (1) and opening an ear hole (31); when the center hole of the part to be tested (3) is a qualified center hole (32), the profiling protrusion (21) completely enters the qualified center hole (32), so that the part to be tested (3) can be smoothly loaded into the sleeve (1); when the center hole of the part to be tested (3) is an unqualified center hole (33), the profiling protrusion (21) interferes with the unqualified center hole (33), and the part to be tested (3) is ejected from the sleeve (1).

2. The center hole error-proofing tool according to claim 1, characterized in that: A positioning step (34) is provided on the outer wall of the part to be tested (3) for cooperating with the upper opening of the sleeve (1) for positioning.

3. The center hole error-proofing tool according to claim 2, characterized in that: When the center hole of the part to be tested (3) is a qualified center hole (32), the positioning step (34) contacts and positions the upper opening of the sleeve (1); when the center hole of the part to be tested (3) is an unqualified center hole (33), the positioning step (34) disengages from the upper opening of the sleeve (1).

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