A main bearing shell cover installation mistake proofing method and system

Abstract

This invention discloses a method and system for preventing incorrect installation of main bearing cover, relating to the field of engine assembly technology. The method includes the following steps: before installing the main bearing cover, the correct installation orientation is determined by detecting the marking protrusions added to the main bearing cover; the main bearing cover is tightened, and sequence numbers are marked on the protrusions of multiple main bearing cover units; during crankshaft installation, the sequence numbers are used to determine if the main bearing cover is incorrectly installed. This invention ensures that the installation sequence and orientation of the main bearing cover are correct.

Description

Technical Field

[0001] This invention relates to the field of engine assembly technology, specifically to a method and system for preventing errors in the installation of main bearing cover. Background Technology

[0002] The crankshaft bore is a crucial structure on the engine block, requiring extremely high precision. It typically consists of the main bearing cap and a semi-circular crankshaft bore on the engine block itself. The main bearing cap has a bearing groove on one side, so its installation requires consideration of the intake and exhaust directions. Before machining the crankshaft bore, the main bearing cap is often installed manually, resulting in a very low rate of incorrect installation.

[0003] In addition, after the parts arrive at the assembly point, the main bearing shell covers need to be manually disassembled, the crankshaft installed, adhesive applied, and then the main bearing shell covers reinstalled. Because the crankshaft bore dimensions differ during machining, each bearing seat must be fitted with its corresponding original shell cover during assembly; incorrect installation is not permitted. To prevent assembly errors, markings are generally required on the top surface of the main bearing shell covers. Traditional markings on bearing shell covers are prone to being unclear, causing inconvenience during assembly and increasing the likelihood of errors during engine assembly.

[0004] To address the aforementioned issues, one existing technique utilizes camera image processing technology to identify the placement orientation and sequence of the main bearing cover assembly by calculating the degree of image fitting. This technique requires, in the preceding process of material loading, brushing a green or blue ink marking line at a specific angle onto the upper surface of the main bearing cover to indicate its placement orientation and sequence within the assembly. However, this method cannot rule out the possibility of the covers being installed backwards before the marking line is applied. Summary of the Invention

[0005] To address the deficiencies in the existing technology, the first aspect of this invention provides a method for preventing errors in the installation of main bearing cover, which can ensure that the installation sequence and orientation of the main bearing cover are correct.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A method for preventing errors in the installation of main bearing cover, the method comprising the following steps:

[0008] Before installing the main bearing cover, the correct orientation of the main bearing cover can be determined by inspecting the marking protrusions added to the main bearing cover.

[0009] Tighten the main bearing caps and mark the sequence number on the bosses of multiple main bearing caps;

[0010] When installing the crankshaft, check the sequence number to determine if the main bearing caps are installed incorrectly.

[0011] In some embodiments, determining the orientation of the main bearing cover by detecting the marking protrusion added to the main bearing cover includes:

[0012] A non-central boss is provided on the top of the main bearing cover;

[0013] Determine the orientation of the main bearing cover based on its position near the edge.

[0014] In some embodiments, after installing the main bearing cap and before tightening the main bearing cap, the following steps are also included:

[0015] The bosses on the main bearing cover are photographed and identified. The correct orientation of the main bearing cover installation is determined by whether the boundary line of the bosses is identified.

[0016] In some embodiments, a step of removing the boss skin is included before marking the sequence number on the boss.

[0017] In some embodiments, numbers or letters are marked on the raised surfaces after the skin has been removed to record the sequence.

[0018] The second aspect of the present invention provides a main bearing cover installation error prevention system, which can ensure that the installation sequence and orientation of the main bearing cover are correct.

[0019] A main bearing cover installation error prevention system includes:

[0020] A machining mechanism for forming an identification boss on the main bearing cover and marking a sequence number on the bosses of the plurality of main bearing covers;

[0021] The inspection agency determines the orientation of the main bearing cover installation based on the boss, and determines whether the main bearing cover is misinstalled according to the sequence number.

[0022] In some embodiments, the processing mechanism is used to provide a non-centered boss on the top of the main bearing cover, and the detection mechanism determines the orientation of the main bearing cover installation based on the position of the boss near the edge.

[0023] In some embodiments, the detection mechanism is also used to photograph and identify the bosses on the main bearing cover, and to determine the orientation of the main bearing cover installation based on whether the boss boundary line is identified.

[0024] In some embodiments, the processing mechanism is also used to remove the skin of the boss.

[0025] In some embodiments, the processing mechanism is also used to mark numbers or letters on the raised surfaces where the skin has been removed to record the sequence.

[0026] Compared with the prior art, the advantages of the present invention are as follows:

[0027] The present invention provides a method for preventing incorrect installation of main bearing cover plates. Before installation, the correct orientation of the main bearing cover plate is determined by inspecting the marking protrusions added to the plate. The main bearing cover plates are then tightened, and sequence numbers are marked on the protrusions of multiple main bearing cover plates. During crankshaft installation, the sequence numbers are used to determine if the main bearing cover plates are incorrectly installed. Thus, during assembly and installation, visual markings ensure the correct installation sequence and orientation of the main bearing cover plates, and even if installed incorrectly, it can be detected immediately. Attached Figure Description

[0028] Figure 1 This is a flowchart of a method for preventing errors in the installation of a main bearing cover according to an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 Flowchart of step S1;

[0030] Figure 3 This is a schematic diagram of the main bearing cover in an embodiment of the present invention. Detailed Implementation

[0031] The technical solutions (including preferred technical solutions) of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0033] Furthermore, in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] See Figure 1 As shown in the figure, an embodiment of the present invention discloses a method for preventing errors in the installation of a main bearing cover, the method comprising the following steps:

[0035] S1. Before installing the main bearing cover, determine the correct orientation of the main bearing cover by inspecting the marking protrusions added to it.

[0036] The concept of this invention is to provide a boss on the main bearing cover that can be used to identify the front and back. After the boss is identified, the front and back of the main bearing cover can be determined based on its characteristics. For example, the front and back can be identified by observing the position of the boss relative to the end face of the main bearing cover.

[0037] Specifically, see Figure 2 As shown, step S1 includes the following steps:

[0038] S11. A non-central boss is provided on the top of the main bearing cover.

[0039] S12. Determine the correct orientation of the main bearing cover installation based on the position of the boss near the edge.

[0040] The purpose of setting a non-central boss is to make the distances from the boss to the two ends different. See [link / reference needed]. Figure 3 As shown, for example, the boss can be set higher up, and then the main bearing cap can be defined as being upright when the boss is higher up. In this way, by observing the position of the boss, if the boss is higher up, the main bearing cap is upright; if the boss is lower down, it indicates that the main bearing cap is in the wrong direction.

[0041] In addition to using detection equipment such as cameras to observe, the location of protrusions can also be identified by visual inspection. The installer only needs to visually inspect the protrusions and observe their positions, which is very convenient.

[0042] S2. Tighten the main bearing caps and mark the sequence number on the bosses of multiple main bearing caps.

[0043] To prevent incorrect installation sequence during assembly, it is generally required to mark the bearing cover sequence number, such as 1, 2, 3, 4, 5, on the top surface of the main bearing cover. Traditional bearing cover markings are usually made on the blank surface, which can easily result in unclear markings, causing inconvenience during assembly and making engine assembly prone to errors.

[0044] In some preferred embodiments, a step of removing the boss skin is included before marking the sequence number on the boss. After removing the boss skin, the boss surface becomes smoother, improving surface roughness compared to the rough surface. Marking on a smooth boss is clearer, more identifiable, and effectively avoids assembly errors.

[0045] It is understandable that, since it is necessary to indicate the sequence, the protrusions can represent numbers, such as 1, 2, 3, 4, 5, or English letters, such as A, B, C, D, E, and other symbols that can represent the sequence. This embodiment of the invention does not impose any limitations on these methods.

[0046] Furthermore, in some preferred embodiments, after installing the main bearing cap and before tightening the main bearing cap, the following steps are also included:

[0047] The bosses on the main bearing cover are photographed and identified. The correct orientation of the main bearing cover installation is determined by whether the boundary line of the bosses is identified.

[0048] This step is mainly to solve the problem of possible deviation when identifying the position of the boss (towards or downwards). In order to more accurately confirm the front and back of the main bearing cover, since the boss is offset, it can be moved closer to one side. In this way, there is no obvious boundary line between the boss and the side it is moved closer to, so the front and back of the main bearing cover can be determined based on this.

[0049] S3. When installing the crankshaft, determine whether the main bearing cap is installed incorrectly based on the sequence number.

[0050] After the judgments in steps S1 and S2, it can be ensured that the main bearing cover is arranged in the correct direction and that each main bearing cover is marked with an easily identifiable sequence number. Then, the sequence number can be used to determine whether the main bearing cover is misinstalled.

[0051] In summary, the main bearing cover installation error prevention method of this invention involves determining the correct installation orientation of the main bearing cover by inspecting the additional marking protrusions on the cover before installation; tightening the main bearing cover and marking the sequence number on the protrusions of multiple main bearing cover units; and checking for incorrect installation of the main bearing cover based on the sequence number during crankshaft installation. This allows for visual marking during assembly, ensuring the correct installation sequence and orientation of the main bearing cover, and enabling immediate detection even if it is installed incorrectly.

[0052] Meanwhile, this invention also discloses a main bearing cover installation error prevention system, including: a processing mechanism and a detection mechanism.

[0053] The machining mechanism is used to form a protrusion for identification on the main bearing cover and to mark a sequence number on the protrusion of the plurality of main bearing covers.

[0054] The inspection agency determines the orientation of the main bearing cover installation based on the boss, and determines whether the main bearing cover is misinstalled based on the sequence number.

[0055] In some embodiments, the processing mechanism is used to provide a non-centered boss on the top of the main bearing cover, and the detection mechanism determines the orientation of the main bearing cover installation based on the position of the boss near the edge.

[0056] In some embodiments, the detection mechanism is also used to photograph and identify the bosses on the main bearing cover, and to determine the orientation of the main bearing cover installation based on whether the boss boundary line is identified.

[0057] In some embodiments, the processing mechanism is also used to remove the skin of the boss.

[0058] In some embodiments, the processing mechanism is also used to mark numbers or letters on the raised surfaces where the skin has been removed to record the sequence.

[0059] In summary, the main bearing cover installation error prevention system of this invention includes a machining mechanism and a detection mechanism. The machining mechanism forms marking bosses on the main bearing cover for identification and marks sequence numbers on the bosses of multiple main bearing cover units. The detection mechanism determines the correct installation orientation of the main bearing cover based on the bosses and determines whether the main bearing cover is misinstalled based on the sequence number. Therefore, during assembly and installation, the correct installation order and orientation of the main bearing cover are ensured, and even if installed incorrectly, it can be detected immediately.

[0060] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A main bearing shell cover installation mistake proofing method characterized by, The method comprises the following steps: Before installing the main bearing bush cover, judging the installation of the main bearing bush cover by detecting the boss added on the main bearing bush cover for identification; Tightening the main bearing bush cover and marking the sequence number on the bosses of the plurality of main bearing bush covers; When installing the crankshaft, judging whether the main bearing bush cover is misassembled according to the sequence number; The judgment of the installation of the main bearing bush cover by detecting the boss added on the main bearing bush cover for identification comprises: Setting a boss not close to the center on the top of the main bearing bush cover; Judging the installation of the main bearing bush cover according to the position of the boss close to the edge; After installing the main bearing bush cover and before tightening the main bearing bush cover, further comprising: Taking a photo of the boss of the main bearing bush cover for identification, and judging the installation of the main bearing bush cover according to whether the boss boundary line is identified.

2. A main bearing shell installation mistake proofing method as claimed in claim 1, wherein: Before marking the sequence number on the boss, further comprising the step of removing the skin of the boss.

3. A main bearing shell installation mistake proofing method as claimed in claim 2, wherein: Marking numbers or letters on the boss with the skin removed to record the sequence.

4. A main bearing shell cover installation mistake proofing system characterized by, Comprise: A processing mechanism for forming the boss for identification on the main bearing bush cover and marking the sequence number on the bosses of the plurality of main bearing bush covers; A detection mechanism for judging the installation of the main bearing bush cover according to the boss and judging whether the main bearing bush cover is misassembled according to the sequence number; The processing mechanism is used for setting a boss not close to the center on the top of the main bearing bush cover, and the detection mechanism is used for judging the installation of the main bearing bush cover according to the position of the boss close to the edge; The detection mechanism is further used for taking a photo of the boss of the main bearing bush cover for identification, and judging the installation of the main bearing bush cover according to whether the boss boundary line is identified.

5. A main bearing shell installation mistake proofing system as claimed in claim 4, wherein: The processing mechanism is further used for removing the skin of the boss.

6. A main bearing shell installation mistake proofing system as claimed in claim 5, wherein: The processing mechanism is further used for marking numbers or letters on the boss with the skin removed to record the sequence.

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