CN216115797U

CN216115797U - Detection tool for engine cylinder cover detection

Info

Publication number: CN216115797U
Application number: CN202122067468.0U
Authority: CN
Inventors: 伍婧晨; 宋丽娜; 孟宪彬
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-03-22
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a checking fixture for checking an engine cylinder cover, which comprises a rectangular checking fixture body, wherein positioning pins corresponding to engine spark plug positioning holes are symmetrically arranged at two ends of one side of the top of the checking fixture body, a plurality of detection pin insertion holes are uniformly arranged at the other side of the top of the checking fixture body, and the checking fixture for checking the engine cylinder cover further comprises a plurality of detection pins corresponding to the detection pin insertion holes. Compared with the prior art, the method has the advantages of simple and convenient measurement, obviously shortened measurement time, greatly saved inspection cost, reduced rework and repair problems, obviously reduced rejection rate and effectively improved production efficiency.

Description

Detection tool for engine cylinder cover detection

Technical Field

The utility model relates to the technical field of engine cylinder cover inspection jigs, in particular to an inspection tool for engine cylinder cover inspection.

Background

The casting needs to be demoulded when the mould is opened after casting and forming, and in order to avoid the problems of ' mould buckling ', pulling damage ' and the like, the mould is generally provided with a slight taper, namely the draft angle. The draft has certain influence to the casting dimensional tolerance of work piece, especially cambered surface, irregular face, because drawing of patterns is difficult, and the draft can be great than the plane, and is bigger to the size influence.

The geometric dimension of the finished casting is inspected at present, and one method is to adopt a scribing method to inspect whether the machining allowance of a blank is enough; another method is a relative measurement method using a reference datum plane (also called a process datum plane) of a blank as a checking datum plane of the blank (the dimensions of the relative datum plane need to be measured and simply converted). The surface measurement of the irregular blank generally adopts a relative measurement method, and the specific operations are two types: one is by scanning the surface of the blank and taking the difference of the dot ratio with respect to the standard size, and one is by taking the fixed position of the dot by three coordinates and measuring the distance with respect to the reference. The currently used measuring method has many defects: 1. the accuracy of the scanning measurement result is high, but the price of scanning equipment is high, the equipment popularization rate is low, the scanning time is long, and whether the part is qualified or not can not be quickly reflected; 2. the three-coordinate point taking fixed position measurement is realized, the point taking position is difficult to determine due to irregular shapes, the point taking quantity is not influenced too much by the shapes, the casting tolerance is generally large, the influence on three coordinates is large, the accuracy rate of measurement results is low, a coordinate system is established by scanning a datum in the three-coordinate measurement, the time consumption is long, and whether a part is qualified or not can not be quickly reflected.

For an engine cylinder cover, when the distance between the convex axle peak avoiding point in the cylinder cover oil cavity and the top surface of the cylinder cover is too small, the interference problem between the cylinder cover oil cavity and the camshaft can occur, namely, the clamping stagnation phenomenon can occur when the camshaft rotates to a certain angle. Because the shape of the cylinder cover is limited, when the depth vernier caliper is used for measurement, the randomness is high, the reliability is poor, the time is consumed, and the quality control difficulty is high.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a checking fixture for checking an engine cylinder cover, and aims to improve the checking reliability and the checking efficiency of the engine cylinder cover.

In order to achieve the purpose, the utility model provides a checking fixture for checking an engine cylinder cover, which comprises a rectangular checking fixture body, wherein positioning pins corresponding to engine spark plug positioning holes are symmetrically arranged at two ends of one side of the top of the checking fixture body, a plurality of detection pin insertion holes are uniformly arranged at the other side of the top of the checking fixture body, and the checking fixture for checking the engine cylinder cover further comprises a plurality of detection pins corresponding to the detection pin insertion holes.

According to a further technical scheme, the detection pin comprises a detection pin body and a handle connected with the detection pin body.

The utility model further adopts the technical scheme that the handle is cylindrical.

The utility model further adopts the technical scheme that the thickness of the detection body is 19.5mm, and the manufacturing height of the detection pin body is not more than 45.7 mm.

The utility model further adopts the technical scheme that the number of the detection pins is two.

The detection tool for detecting the engine cylinder cover has the advantages that:

1. the method has the advantages of simple and convenient measurement, obviously shortened measurement time, greatly saved inspection cost, reduced rework and repair problems, obviously reduced rejection rate and effectively improved production efficiency;

2. the use is reliable, and the quality problem that the corresponding size out-of-tolerance defect flows into a client is restrained.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a preferred embodiment of a checking fixture for engine cylinder head inspection according to the present invention.

The reference numbers illustrate:

detecting a body 1; a positioning pin 2; a detection pin insertion hole 3; a detection pin 4; a detection pin body 5; a handle 6.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, the utility model provides a checking fixture for checking an engine cylinder cover, the preferred embodiment of the checking fixture for checking the engine cylinder cover comprises a rectangular checking fixture body 1, positioning pins 2 corresponding to engine spark plug positioning holes are symmetrically arranged at two ends of one side of the top of the checking fixture body 1, a plurality of detecting pin insertion holes 3 are uniformly arranged at the other side of the top of the checking fixture body, and the checking fixture for checking the engine cylinder cover further comprises a plurality of detecting pins 4 corresponding to the detecting pin insertion holes 3.

The number of the detection pins 4 and the number of the detection pin insertion holes 3 may be set according to actual requirements, for example, eight detection pin insertion holes are set, and two detection pins are set.

It should be noted that, in this embodiment, the top surface of the engine cylinder head is provided with a cam shaft tip avoidance point, when detecting, the detection tool body is placed on the top surface of the engine cylinder head, the two positioning pins 2 are respectively inserted into the engine spark plugs, at this time, the top surface of the engine cylinder head is provided with a cam shaft tip avoidance point located in the corresponding detection pin insertion holes 3, and after the detection tool body 1 is positioned, the plurality of detection pins 4 are respectively inserted into the plurality of detection holes for detection.

Specifically, in the present embodiment, the detection pin 4 includes a detection pin body 5 and a handle 6 connected to the detection pin body 5, and the handle 6 is cylindrical.

When the engine cylinder cover is detected, if the detection pin body 5 is completely immersed into the detection pin jack 3, the workpiece is detected to be qualified, and if the detection pin body 5 is exposed and is higher than the upper surface of the detection body 1, the workpiece is detected to be unqualified.

In this embodiment, the thickness of the test element 1 is 19.5mm, and the height of the test pin body 5 is not more than 45.7mm (19.5mm (thickness of the test element 1) +27mm (bottom arc) -0.8mm (required gap) ═ 45.7mm), which is used as the test limit of the test tool.

The utility model discloses a detection tool for detecting an engine cylinder cover, which has the technical innovation points that:

1. the gauge structure can effectively reduce the measurement uncertainty caused by factors such as blank draft and the like, and can detect a plurality of irregular features and position relations at one time;

2. the distance between the casting blank position of the peach-tip avoidance point of the cylinder cover low-pressure oil cavity of the 15 series of cylinder covers and the top surface of the cylinder cover is designed to be consistent, so that the gauge can meet the measurement requirements of all the cylinder covers of the 15 series of cylinder covers, can be compatible with multiple models, is convenient to operate and has strong popularization;

3. the detection tool body is provided with an inner cavity matched with the shape of a to-be-measured body, a positioning pin is placed in a spark plug hole of a cylinder cover during measurement, then a detection tool pin is inserted into the inner cavity, and a cylinder cover blank and the detection tool pin do not have any interference and are qualified products;

4. the checking fixture is simple in structure and reasonable in design, and can quickly judge whether the workpiece meets the size requirement.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an examine utensil for engine cylinder lid is examined, its characterized in that, an examine utensil for engine cylinder lid is examined and is examined the body including the rectangle, examine specific top one side in both ends symmetry be provided with the corresponding locating pin of engine spark plug locating hole, a plurality of detection round pin jacks have evenly been arranged to the opposite side, an examine utensil for engine cylinder lid is examined still include with a plurality of detection round pins that a plurality of detection round pin jacks correspond.

2. The tool for inspecting engine cylinder heads according to claim 1, characterized in that the detection pin comprises a detection pin body and a handle connected with the detection pin body.

3. The inspection tool for engine cylinder head inspection according to claim 2, wherein the handle is cylindrical in shape.

4. The checking fixture for engine cylinder head inspection according to claim 3, characterized in that the thickness of the checking fixture body is 19.5mm, and the manufacturing height of the checking pin body does not exceed 45.7 mm.

5. The checking fixture for engine cylinder head inspection according to any one of claims 1 to 4, characterized in that the number of the detecting pins is two.