A kind of inspection tool for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve

Abstract

The utility model relates to a check fixture for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve, comprising a base, a positioning part is arranged on the top of the base, the positioning part fixes the connecting rod on the top of the base, and an inspection component is also arranged on the top of the base; the inspection component inspects the curvature of the curved surface at the big end of the connecting rod. The utility model relates to the technical field of connecting rod check fixtures. The utility model has the effect of preventing unqualified connecting rods from flowing out of the production line and improving the first-time qualified rate of products.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting rod inspection tools, in particular to an inspection tool used for detecting the interference of the big end of the connecting rod with an oblique cut with a cylinder sleeve. Background Art

[0002] The connecting rod is a core component of the internal combustion engine. During the engine installation process, it is often encountered that the connecting rod big end has a slight deviation in the non-machined surface, which causes interference with the cylinder liner during the assembly process and affects the final assembly.

[0003] The production line operators are unable to directly measure and determine the curvature of the big head end surface with measuring tools such as calipers, and urgently need an inspection tool to inspect and determine the connecting rod surface, thereby improving the first-time pass rate of the connecting rod. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a check fixture for detecting interference between the big end of a bevel cut connecting rod and a cylinder sleeve, which has the effect of preventing unqualified connecting rods from flowing out of the production line and improving the product qualification rate.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A test fixture for detecting interference between the big end of a bevel cut connecting rod and a cylinder sleeve, comprising a base, a positioning part is arranged on the top of the base, the positioning part fixes the connecting rod on the top of the base, and a test assembly is also arranged on the top of the base;

[0007] The detection assembly checks the curvature of the curved surface at the big end of the connecting rod.

[0008] In a preferred example, the utility model can be further configured as follows: the positioning part includes a cylindrical positioning pin and a diamond positioning pin, the cylindrical positioning pin and the diamond positioning pin are both arranged on the top of the base, the cylindrical positioning pin is used to fix the position of the small end of the connecting rod, and the diamond positioning pin is used to fix the position of the large end of the connecting rod;

[0009] The cylindrical positioning pin and the diamond positioning pin are both connected to the base through bolts.

[0010] In a preferred example, the utility model can be further configured as follows: the inspection assembly includes an inspection block, the inspection block is arranged on the top of the base, the inspection block is rotatably connected to the base via a rotating pin, and the inspection block is rotatably connected to the base;

[0011] The end of the inspection block close to the connecting rod is set to be arc-shaped, and the surface of the arc-shaped end of the inspection block is in contact with the surface of the curved surface of the big end of the connecting rod;

[0012] The arc center of the arc-shaped end of the inspection block is located on the straight line where the center line of the rotating pin connecting the base and the inspection block is located.

[0013] In a preferred example, the utility model can be further configured as follows: a rotating assembly is provided on the inspection block, and the rotating assembly drives the inspection block to rotate around a rotating pin.

[0014] In a preferred example, the utility model can be further configured as follows: the rotating assembly includes a rotating rod, a threaded hole is opened on the top of the inspection block, the rotating rod is partially located in the threaded hole, and the inspection block is threadedly connected to the threaded hole.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects:

[0016] 1. By placing the required inspection connecting rod size holes in the positioning pins on the base, and using the inspection assembly set on the base to detect the curvature of the connecting rod big end, it is possible to prevent unqualified connecting rods from leaving the factory and improve the product qualification rate.

[0017] 2. The rotating assembly is provided to facilitate the operator to quickly rotate the inspection block without contacting the connecting rod during the rotation of the inspection block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall top view of the structure of this embodiment (without the rotating rod, and the dotted line in the figure is the movement path of the inspection block);

[0019] Figure 2 yes Figure 1 Schematic diagram of the main half-section structure.

[0020] In the figure, 1, base; 11, cylindrical positioning pin; 12, diamond positioning pin; 2, detection component; 21, inspection block; 3, rotating component; 31, rotating handle; 32, threaded hole. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Example:

[0023] Reference Figure 1-Figure 2 As shown, the utility model discloses a check fixture for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve, comprising a base 1. A positioning part is arranged on the top of the base 1. The positioning part fixes the connecting rod on the top of the base 1.

[0024] The positioning part includes a cylindrical positioning pin 11 and a diamond positioning pin 12, both of which are arranged on the top of the base 1, and the cylindrical positioning pin 11 is used to fix the position of the small end of the connecting rod, and the diamond positioning pin 12 is used to fix the position of the large end of the connecting rod.

[0025] The cylindrical positioning pin 11 and the diamond positioning pin 12 are both connected to the base 1 by bolts, which facilitates the operator to timely replace the matching cylindrical positioning pin 11 and diamond positioning pin 12. After the connecting rod is positioned by the cylindrical positioning pin 11 and the diamond positioning pin 12, the position of the connecting rod will not change, and one side of the connecting rod is in contact with the top of the base 1.

[0026] A testing component 2 is also provided on the top of the base 1, and the testing component 2 detects the curvature of the curved surface at the big end of the connecting rod.

[0027] The inspection assembly 2 includes an inspection block 21, which is arranged on the top of the base 1. The inspection block 21 is rotatably connected to the base 1 through a rotating pin. The inspection block 21 is rotatably connected to the base 1. The end of the inspection block 21 close to the connecting rod is set to be arc-shaped, and the surface where the arc-shaped end of the inspection block 21 is located is in contact with the surface where the curved surface of the big end of the connecting rod is located. The arc center of the arc-shaped end of the inspection block 21 is located on the straight line where the center line of the rotating pin connecting the base 1 and the inspection block 21 is located. The inspection block 21 performs a circular motion around the rotating pin. During the rotation of the inspection block 21, the arc-shaped end of the inspection block 21 is in contact with one side of the curved surface of the big end of the connecting rod.

[0028] The inspection block 21 is provided with a rotating assembly 3, and the rotating assembly 3 drives the inspection block 21 to rotate around the rotating pin. The rotating assembly 3 includes a rotating rod 31, and a threaded hole 32 is opened on the top of the inspection block 21. The rotating handle 31 is partially located in the threaded hole 32, and the inspection block 21 is threadedly connected with the threaded hole 32.

[0029] In this embodiment, the connecting rods are all connecting rods with qualified quality and size.

[0030] The implementation principle of the above embodiment is:

[0031] The operator first selects cylindrical positioning pins 11 and diamond positioning pins 12 of appropriate specifications, and installs the cylindrical positioning pins 11 and diamond positioning pins 12 in place.

[0032] The operator places the connecting rod to be inspected on the base 1, the cylindrical positioning pin 11 fixes the small end of the connecting rod, and the diamond positioning pin 12 fixes the large end of the connecting rod. It should be noted that when placing the connecting rod, the arc end of the inspection block 21 is located outside the base 1, that is, the arc end on the inspection block 21 is away from the connecting rod.

[0033] After the connecting rod is placed, the operator holds the rotating handle 31, and the rotating handle 31 drives the inspection block 21 to rotate around the rotating pin. If the inspection block 21 can rotate one circle smoothly, it proves that the connecting rod is qualified. If the inspection block 21 cannot rotate one circle, it proves that the connecting rod size is problematic.

[0034] It is particularly noted that, in this embodiment, the radius of the horizontal projection of the arc surface of the inspection block 21 is adapted to the radius of the cross-section of the outer curved surface at the big end of the qualified connecting rod.

[0035] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A test fixture for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve, characterized in that: It comprises a base (1), the top of the base (1) is provided with a positioning portion, the positioning portion fixes the connecting rod on the top of the base, and the top of the base (1) is also provided with an inspection component (2); The inspection component (2) inspects the curvature of the curved surface at the big end of the connecting rod.

2. A test fixture for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve according to claim 1, characterized in that: The positioning portion comprises a cylindrical positioning pin (11) and a diamond-shaped positioning pin (12), wherein the cylindrical positioning pin (11) and the diamond-shaped positioning pin (12) are both arranged on the top of the base (1), and the position of the small end of the connecting rod is fixed by the cylindrical positioning pin (11), and the position of the large end of the connecting rod is fixed by the diamond-shaped positioning pin (12); The cylindrical positioning pin (11) and the diamond-shaped positioning pin (12) are both connected to the base (1) via bolts.

3. A test fixture for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve according to claim 2, characterized in that: The inspection assembly (2) comprises an inspection block (21), wherein the inspection block (21) is arranged on the top of the base (1), and the inspection block (21) is rotatably connected to the base (1) via a rotating pin, and the inspection block (21) is rotatably connected to the base (1); The inspection block (21) is arranged in an arc shape at one end close to the connecting rod, and the surface where the arc end of the inspection block (21) is located is in contact with the surface where the curved surface of the large end of the connecting rod is located; The arc center of the arc-shaped end of the inspection block (21) is located on a straight line where a center line of a rotating pin connecting the base (1) and the inspection block (21) is located.

4. A test fixture for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve according to claim 3, characterized in that: The inspection block (21) is provided with a rotating assembly (3), and the rotating assembly (3) drives the inspection block (21) to rotate around a rotating pin.

5. A test fixture for detecting the interference of the big end of the oblique cut connecting rod with the cylinder sleeve according to claim 4, characterized in that: The rotating assembly (3) comprises a rotating rod (31), a threaded hole (32) is formed at the top of the inspection block (21), a portion of the rotating rod (31) is located in the threaded hole (32), and the inspection block (21) is threadedly connected to the threaded hole (32).

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