A cylinder bore chamfer detection tool

Abstract

The utility model discloses a kind of cylinder hole chamfer detection tools, the tool includes: sliding block, including circular bottom plate and guide rod, the diameter of bottom plate is equal to the diameter of cylinder hole, guide rod is located in the side of bottom plate and is perpendicular to bottom plate, the end of guide rod away from bottom plate has the first identification structure and the second identification structure arranged along first direction, the interval of first identification structure from second identification structure is equal to chamfer depth tolerance, first direction is the direction of bottom plate pointing guide rod;Shell, sleeve on the outside of guide rod, and with guide rod slidable cooperation, the side of shell towards bottom plate has first reference plane, the side of shell away from bottom plate has second reference plane;Bottom plate is used to insert the chamfer of cylinder hole, first reference plane is used to be in contact with the top surface of cylinder hole, when cylinder hole chamfer depth is up to standard, second reference plane is located between first identification structure and second identification structure. The tool can be lightweight design and can improve the convenience and accuracy of measurement.

Description

Technical Field

[0001] This utility model relates to the field of mechanical testing technology, and in particular to a cylinder bore chamfering testing tool. Background Technology

[0002] During the machining process, engine parts must conform to the dimensions required by the drawings. After production, it is necessary to inspect whether the various aspects of the engine parts meet the standards. To accurately and quickly measure whether the depth of the engine cylinder bore chamfer meets the standards, a common method is to use a touch gauge. However, for cases with large bore diameters and small chamfers, the commonly used touch gauge is often inaccurate due to its size and weight. Utility Model Content

[0003] This invention provides a cylinder bore chamfering inspection tool. The above-mentioned cylinder bore chamfering inspection tool can achieve a lightweight design and improve the convenience and accuracy of cylinder bore chamfering measurement.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A cylinder bore chamfering inspection tool for detecting the chamfering depth of cylinder bores on an engine block, comprising:

[0006] The slider includes a base plate and a guide rod. The base plate is circular, and its diameter is equal to the diameter of the cylinder bore. The guide rod is located on one side of the base plate and is perpendicular to the extension surface of the base plate. The end of the guide rod away from the base plate has a first identification structure and a second identification structure arranged along a first direction. The distance between the first identification structure and the second identification structure along the first direction is equal to the chamfer depth tolerance. The first direction is the direction from the base plate to the guide rod.

[0007] The outer casing has a guide hole, and the outer casing is fitted onto the outside of the guide rod through the guide hole. The inner wall of the guide hole and the guide rod can slide in a first direction. The side of the outer casing facing the base plate has a first reference plane, and the orthographic projection of the first reference plane onto the extension surface of the base plate is located outside the area where the base plate is located. The side of the outer casing away from the base plate has a second reference plane, and the first reference plane and the second reference plane are parallel to the extension surface of the base plate.

[0008] The base plate is used to insert into the chamfer of the cylinder bore, the first reference plane is used to abut against the top surface of the cylinder bore, and when the chamfer depth of the cylinder bore meets the standard, the second reference plane is located between the first identification structure and the second identification structure along the first direction.

[0009] Optionally, the housing includes a base and a guide sleeve arranged along a first direction;

[0010] The guide hole extends through the base and the guide sleeve along a first direction;

[0011] The base has a first reference plane on the side facing the base plate, and the orthographic projection of the base on the first reference plane is located within the first reference plane;

[0012] The guide sleeve is connected to the base, and the side of the guide sleeve away from the base has the second reference plane. The orthographic projection of the guide sleeve on the extension surface of the base plate is located in the area where the base plate is located.

[0013] Optionally, the centerline of the base coincides with the centerline of the base plate;

[0014] The maximum distance from the edge of the first reference plane to the center line of the base is the first distance, which is greater than the maximum radius of the chamfer of the cylinder bore.

[0015] Optionally, the side of the base is perpendicular to the first reference plane, and at least part of the side of the base is arc-shaped, with the radius of curvature of the arc-shaped portion of the side of the base being equal to the first distance.

[0016] Optionally, the side of the base includes a first arc surface and a second arc surface disposed opposite to each other, and a first plane and a second plane disposed opposite to each other, wherein the distance of the first plane from the center line of the base is less than the radius of the base plate.

[0017] Optionally, when a pressure plate is provided on the cylinder block of the engine, the pressure plate has a through hole opposite to the cylinder bore, the center line of the through hole coincides with the center line of the cylinder bore, and the radius of the through hole is greater than the maximum radius of the chamfer of the cylinder bore;

[0018] The radius of curvature of the arc-shaped portion of the base is smaller than the radius of the through hole.

[0019] Optionally, the slider further includes a positioning block located on the side of the base plate facing the housing, the base having a positioning groove that mates with the positioning block, the positioning block being able to be inserted into the positioning groove, and the guide rod being connected to the positioning block.

[0020] Optionally, the outer wall of the guide sleeve has an anti-slip pattern.

[0021] Optionally, the first identification structure is a first step surface, and the second identification structure is a second step surface, both of which are parallel to the extension surface of the base plate.

[0022] Optionally, the thickness of the base plate is less than the depth of the cylinder bore chamfer.

[0023] This invention provides a cylinder bore chamfering detection tool, which includes a slider and a housing. The housing is fitted onto the outside of the guide rod of the slider through a guide hole, and the housing and guide rod can slide in a first direction. When using this tool to detect the depth of the cylinder bore chamfer, the bottom plate of the slider can be inserted into the chamfer. Since the diameter of the bottom plate is equal to the diameter of the cylinder bore, the bottom plate can slide to the connection point between the chamfer and the cylinder bore and lock in place, accurately guiding and preventing the slider from tilting. Then, the first reference plane of the housing abuts against the top surface of the cylinder bore. If the depth of the cylinder bore chamfer meets the standard depth, a second reference plane on the housing can be observed to be located between the first and second identification structures; otherwise, the depth of the cylinder bore chamfer does not meet the standard depth. This cylinder bore chamfering detection tool has a simple structure, achieves lightweight design, is easy to operate, and can quickly and accurately measure whether the depth of the cylinder bore chamfer meets the standard, thus improving the convenience and accuracy of cylinder bore chamfer measurement. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of a slider provided in an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the structure of a shell provided for an embodiment of this utility model;

[0026] Figure 3 A schematic diagram of the structure of a cylinder bore chamfering inspection tool provided in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of another cylinder bore chamfering inspection tool provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of an engine cylinder block in related technologies;

[0029] Figure 6 This is a schematic diagram of another engine cylinder block in the related technology;

[0030] Figure 7 This is a cross-sectional view of an engine cylinder block in the related art;

[0031] Figure 8 for Figure 3 A magnified view of a portion of the image;

[0032] Figure 9 This is a plan view of a cylinder bore chamfering inspection tool provided in an embodiment of the present invention.

[0033] icon:

[0034] 1-Slider; 11-Base plate; 12-Guide rod; 121-First identification structure; 122-Second identification structure; 13-Positioning block; 2-Outer shell; 201-Guide hole; 21-Base; 211-First reference plane; 212-First arc surface; 213-Positioning groove; 22-Guide sleeve; 221-Second reference plane; 222-Anti-slip pattern; 3-Cylinder body; 31-Cylinder hole; 311-Chamfer; 32-Top surface; 4-Pressure plate; 41-Through hole. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please refer to Figures 1 to 4 This utility model provides a cylinder bore chamfering inspection tool for detecting the chamfering depth of cylinder bores on an engine block, including:

[0037] The slider 1 includes a base plate 11 and a guide rod 12. The base plate 11 is circular and its diameter is equal to the diameter of the cylinder bore. The guide rod 12 is located on one side of the base plate 11 and is perpendicular to the extension surface of the base plate 11. The end of the guide rod 12 away from the base plate 11 has a first identification structure 121 and a second identification structure 122 arranged along a first direction. The distance between the first identification structure 121 and the second identification structure 122 along the first direction is equal to the chamfer depth tolerance. The first direction is the direction from the base plate 11 to the guide rod 12.

[0038] The outer shell 2 has a guide hole 201. The outer shell 2 is fitted onto the outside of the guide rod 12 through the guide hole 201. The inner wall of the guide hole 201 and the guide rod 12 can slide together in a first direction. The side of the outer shell 2 facing the base plate 11 has a first reference plane 211. The orthographic projection of the first reference plane 211 onto the extension surface of the base plate 11 is located outside the area where the base plate 11 is located. The side of the outer shell 2 away from the base plate 11 has a second reference plane 221. The first reference plane 211 and the second reference plane 221 are parallel to the extension surface of the base plate 11.

[0039] The base plate 11 is used to insert into the chamfer of the cylinder bore, the first reference plane 211 is used to abut against the top surface of the cylinder body with the cylinder bore, and when the chamfer depth of the cylinder bore meets the standard, the second reference plane 221 is located between the first identification structure 121 and the second identification structure 122 along the first direction.

[0040] The cylinder bore chamfering inspection tool provided in this embodiment of the utility model includes a slider 1 and a housing 2. The housing 2 is fitted onto the outside of the guide rod 12 of the slider 1 through a guide hole 201, and the housing 2 and the guide rod 12 can slide together in a first direction; Figure 5 The diagram shows a structural schematic of an engine block in the related art. During the process of using the aforementioned cylinder bore chamfering detection tool to detect the depth of the chamfer on the cylinder bore 31 of the cylinder block 3, the base plate 11 of the slider 1 can be inserted into the cylinder bore chamfer. Since the diameter of the base plate 11 is equal to the diameter of the cylinder bore 31, the base plate 11 can slide to the connection point between the chamfer and the cylinder bore and be locked in place, accurately guiding and preventing the slider 1 from tilting. Then, the first reference plane 211 of the outer shell 2 can abut against the top surface 32 of the cylinder bore. If the depth of the cylinder bore chamfer meets the standard depth, it can be observed that the second reference plane 221 on the outer shell 2 is located between the first identification structure 121 and the second identification structure 122; otherwise, the depth of the cylinder bore chamfer does not meet the standard depth. The aforementioned cylinder bore chamfering detection tool has a simple structure, achieves lightweight design, is easy to operate, and can quickly and accurately measure whether the depth of the cylinder bore chamfer meets the standard, thus improving the convenience and accuracy of cylinder bore chamfering measurement.

[0041] Specifically, the outer casing 2 may include a base 21 and a guide sleeve 22 arranged along a first direction; a guide hole 201 penetrates the base 21 and the guide sleeve 22 along the first direction; the side of the base 21 facing the base plate 11 has a first reference plane 211, and the orthographic projection of the base 21 on the first reference plane 211 is located within the first reference plane 211; the guide sleeve 22 is connected to the base 21, and the side of the guide sleeve 22 away from the base 21 has a second reference plane 221, and the orthographic projection of the guide sleeve 22 on the extension surface of the base plate 11 is located within the area where the base plate 11 is located. The outer casing 2 has a simple structure, is easy to manufacture, and can achieve a lightweight design.

[0042] In this embodiment of the invention, the centerline of the base 21 coincides with the centerline of the base plate 11; the maximum distance from the edge of the first reference plane 211 to the centerline of the base 21 is a first distance, which is greater than the maximum radius of the cylinder bore chamfer. Since the centerline of the base 21 coincides with the centerline of the base plate 11, the base 21 has a symmetrical structure. This allows at least two sides of the first reference plane 211 to abut against the top surface 32 of the cylinder bore, enhancing the stability of the outer shell 2 during chamfer inspection, preventing tilting of the outer shell 2, improving inspection accuracy, and providing a simple and easy-to-operate structure.

[0043] Specifically, the side of the base 21 can be perpendicular to the first reference plane 211. At least part of the side of the base 21 is arc-shaped. The bending radius of the arc-shaped part of the side of the base 21 is equal to the first distance. The structure is simple and easy to operate. It is convenient to align the edge of the first reference plane 211 with the top surface 32 of the cylinder bore when testing the cylinder bore, so as to avoid tilting of the outer shell 2 and improve the accuracy of the test.

[0044] Specifically, such as Figure 2 and Figure 3 As shown, the side of the base 21 includes a first arc surface 212 and a second arc surface arranged opposite to each other, as well as a first plane 213 and a second plane arranged opposite to each other. The distance between the first plane 213 and the second plane and the center line of the base 21 is less than the radius of the base plate 11. The structure is simple and easy to manufacture, and it can realize the lightweight design of the chamfering inspection tool.

[0045] Existing conventional touch gauges typically have poor adaptability to cylinder bores in engine blocks with attached pressure plates, making accurate measurement difficult in actual production environments. The pressure plates or tooling materials used in the parts can render the reference surface on the cylinder bore chamfer unpositionable. In such cases, other hole systems (e.g., crankshaft bores) can be used as positioning references for cylinder bore chamfer inspection, with dimensional chain conversions used for substitution. However, this inspection method is complex, inconvenient, and lacks accuracy.

[0046] like Figure 5 and Figure 6 The diagram shows a structural schematic of an engine cylinder block in the related technology. A pressure plate 4 is provided on the engine cylinder block 3. The part process requires the installation of the pressure plate to be processed and measured with a thickness of 50mm. The size of the pressure plate 4 is uneven and varies greatly, so it cannot be used as a substitute reference. The pressure plate 4 has a through hole 41 opposite to the cylinder bore 31. The center line of the through hole 41 coincides with the center line of the cylinder bore 31. The radius of the through hole 41 is greater than the maximum radius of the cylinder bore chamfer 311.

[0047] In order to detect the chamfer of the cylinder bore on the cylinder body with the pressure plate, in this embodiment of the utility model, the bending radius of the arc-shaped part of the side of the base 21 is greater than the maximum radius of the cylinder bore chamfer 311 and less than the radius of the through hole 41. When detecting the cylinder bore chamfer 311, the bottom plate 11 of the slider 1 and the base 21 of the outer shell 2 can be inserted through the through hole 41, so that the bottom plate 11 is stuck at the bottom end of the cylinder bore chamfer 311, and the first reference plane 211 on the base 21 abuts against the top surface 32 of the cylinder bore.

[0048] The aforementioned cylinder bore chamfering inspection tool has a simple structure and is easy to operate. It can quickly and accurately measure whether the cylinder bore chamfer meets the standard, improve inspection efficiency, avoid errors caused by using alternative references and dimensional chain conversions, and improve the stability and reliability of inspection.

[0049] In a specific implementation plan, such as Figure 7 As shown, the diameter of the cylinder bore can be 94mm, the chamfer depth d is only 1.25mm, and the extremely small area of ​​the top surface 32 can be exposed through the through hole 41 on the pressure plate. The difference between the bending radius of the arc-shaped portion of the side of the base 21 and the maximum radius of the chamfer 311 of the cylinder bore can be 0.25mm, so that the edge of the first reference plane 211 of the outer shell 2 abuts against the extremely small area of ​​the top surface 32 of the cylinder bore exposed through the through hole 41. Specifically, the specific values ​​of the diameter of the cylinder bore 31, the chamfer depth d, the bending radius of the arc-shaped portion of the side of the base 21, and the radius of the through hole 41 are not limited here and are determined according to the actual situation.

[0050] In this embodiment of the utility model, such as Figure 2 and Figure 3 As shown, the slider 1 also includes a positioning block 13 located on the side of the base plate 11 facing the outer shell 2. The base 21 has a positioning groove 214 that cooperates with the positioning block 13. The positioning block 13 can be inserted into the positioning groove 214. The guide rod 12 is connected to the positioning block 13. Through the cooperation between the positioning block 13 and the positioning groove 214, the relative sliding between the slider 1 and the outer shell 2 can be guided, which can improve the stability and reliability of the detection.

[0051] In this embodiment of the utility model, such as Figure 2 As shown, the outer wall of the guide sleeve 22 may have anti-slip patterns 222, which can facilitate the removal of the outer shell 2 during the chamfer depth detection process and improve the assembly efficiency of the slider 1 and the outer shell 2.

[0052] Specifically, the anti-slip pattern 222 can be formed through a rolling process.

[0053] In this embodiment of the utility model, such as Figure 8 and Figure 9 As shown, the first identification structure 121 can be a first step surface, and the second identification structure 122 can be a second step surface. Both the first step surface and the second step surface are parallel to the extension surface of the base plate 11. During the inspection of the cylinder bore chamfer, if the cylinder bore chamfer depth reaches the standard depth, the second reference plane 221 is located between the first step surface and the second step surface along the first direction. That is, the first step surface is located inside the guide hole 201, and the second step surface is exposed outside the guide hole 201. The inspector can distinguish whether the cylinder bore chamfer depth has reached the standard depth by touch, and can quickly and accurately measure the cylinder bore chamfer.

[0054] The distance between the first and second step surfaces is defined as the chamfer depth tolerance. For example, if the chamfer depth is 1.25 ± 0.25 mm, then the distance between the first and second step surfaces can be 0.5 mm. Specifically, the distance between the first and second step surfaces is not limited here and depends on the actual situation.

[0055] Optionally, the first identification structure 121 can also be a first identification mark located on the outer wall of the guide rod 12, and the second identification structure 122 can also be a second identification mark located on the outer wall of the guide rod 12. By observing the positions of the first identification mark and the second identification mark, it can be determined whether the depth of the cylinder bore chamfer meets the standard. If the depth of the cylinder bore chamfer reaches the standard depth, the first identification mark cannot be observed, but the second identification mark can be observed.

[0056] In this embodiment of the utility model, the thickness of the base plate 11 can be less than the depth of the cylinder bore chamfer. The base plate 11 is inserted into the cylinder bore chamfer and is locked at the bottom of the cylinder bore chamfer, which facilitates the first reference plane 211 on the base 21 to abut against the top surface of the cylinder bore, thus avoiding affecting the accuracy of the test.

[0057] Optionally, the overall thickness of the base plate 11 may not be less than the depth of the cylinder bore chamfer. The base plate 11 may have a groove opposite to the base 21. The base 21 may be located in the groove, so that the thickness of the base plate 11 at the groove is less than the depth of the cylinder bore chamfer.

[0058] In this embodiment of the utility model, the slider 1 can be a one-piece design and the outer shell 2 can be a one-piece design, which can ensure the accuracy of the cylinder bore chamfering detection tool.

[0059] Specifically, the materials of slider 1 and housing 2 can be metal, which facilitates the improvement of the dimensional accuracy of slider 1 and housing 2.

[0060] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A cylinder bore chamfering inspection tool, used to inspect the chamfering depth of cylinder bores on an engine block, characterized in that, include: The slider includes a base plate and a guide rod. The base plate is circular, and its diameter is equal to the diameter of the cylinder bore. The guide rod is located on one side of the base plate and is perpendicular to the extension surface of the base plate. The end of the guide rod away from the base plate has a first identification structure and a second identification structure arranged along a first direction. The distance between the first identification structure and the second identification structure along the first direction is equal to the chamfer depth tolerance. The first direction is the direction from the base plate to the guide rod. The outer casing has a guide hole, and the outer casing is fitted onto the outside of the guide rod through the guide hole. The inner wall of the guide hole and the guide rod can slide in a first direction. The side of the outer casing facing the base plate has a first reference plane, and the orthographic projection of the first reference plane onto the extension surface of the base plate is located outside the area where the base plate is located. The side of the outer casing away from the base plate has a second reference plane, and the first reference plane and the second reference plane are parallel to the extension surface of the base plate. The base plate is used to insert into the chamfer of the cylinder bore, the first reference plane is used to abut against the top surface of the cylinder bore, and when the chamfer depth of the cylinder bore meets the standard, the second reference plane is located between the first identification structure and the second identification structure along the first direction.

2. The cylinder bore chamfering inspection tool according to claim 1, characterized in that, The housing includes a base and a guide sleeve arranged along a first direction; The guide hole extends through the base and the guide sleeve along a first direction; The base has a first reference plane on the side facing the base plate, and the orthographic projection of the base on the first reference plane is located within the first reference plane; The guide sleeve is connected to the base, and the side of the guide sleeve away from the base has the second reference plane. The orthographic projection of the guide sleeve on the extension surface of the base plate is located in the area where the base plate is located.

3. The cylinder bore chamfering inspection tool according to claim 2, characterized in that, The centerline of the base coincides with the centerline of the base plate; The maximum distance from the edge of the first reference plane to the center line of the base is the first distance, which is greater than the maximum radius of the cylinder bore chamfer.

4. The cylinder bore chamfering inspection tool according to claim 3, characterized in that, The side of the base is perpendicular to the first reference plane, and at least part of the side of the base is arc-shaped, with the radius of curvature of the arc-shaped portion of the base being equal to the first distance.

5. The cylinder bore chamfering inspection tool according to claim 4, characterized in that, The side of the base includes a first arc surface and a second arc surface arranged opposite to each other, as well as a first plane and a second plane arranged opposite to each other. The distance of the first plane from the center line of the base is less than the radius of the base plate.

6. The cylinder bore chamfering inspection tool according to claim 4, characterized in that, When a pressure plate is provided on the cylinder block of the engine, the pressure plate has a through hole opposite to the cylinder bore, the center line of the through hole coincides with the center line of the cylinder bore, and the radius of the through hole is greater than the maximum radius of the chamfer of the cylinder bore; The radius of curvature of the arc-shaped portion of the base is smaller than the radius of the through hole.

7. The cylinder bore chamfering inspection tool according to any one of claims 2-6, characterized in that, The slider also includes a positioning block located on the side of the base plate facing the outer shell. The base has a positioning groove that mates with the positioning block. The positioning block can be inserted into the positioning groove. The guide rod is connected to the positioning block.

8. The cylinder bore chamfering inspection tool according to any one of claims 2-6, characterized in that, The outer wall of the guide sleeve has an anti-slip pattern.

9. The cylinder bore chamfering inspection tool according to any one of claims 1-6, characterized in that, The first identification structure is a first step surface, and the second identification structure is a second step surface. Both the first step surface and the second step surface are parallel to the extension surface of the base plate.

10. The cylinder bore chamfering inspection tool according to any one of claims 1-6, characterized in that, The thickness of the base plate is less than the depth of the cylinder bore chamfer.

Images