Mistaken-mounting prevention structure for main bearing cover and engine

Abstract

The utility model provides a main bearing cover mistakenly-mounting-preventing structure and an engine. The main bearing cover mistakenly-mounting-preventing structure comprises a first mounting hole and a second mounting hole. The first mounting hole is used for mounting the positioning pin sleeve and comprises a first sub-hole and a second sub-hole which are communicated with each other, and the first sub-hole and the second sub-hole are correspondingly formed in the main bearing cover and the main bearing seat of the machine body respectively; the second mounting hole comprises a first segmented hole and a second segmented hole, the first segmented hole is formed in the main bearing cover and communicated with the first sub-hole, and the second segmented hole is formed in the main bearing seat and communicated with the second sub-hole; wherein the axes of the first segmented hole and the first sub-hole are arranged differently, and the axes of the second segmented hole and the second sub-hole are arranged differently; when the main bearing cover and the main bearing seat are assembled in the first direction, the axis of the first segmented hole is the same as that of the second segmented hole, and therefore the problem that in the prior art, the structure is complex due to the fact that marks are machined and installed on the main bearing cover to prevent wrong installation is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to main bearing cap mistake proofing technical field, specifically, a kind of main bearing cap mistake proofing structure and engine. BACKGROUND

[0002] Main bearing is important component of engine, its structure is complex, assembly requirement is high, so in assembly process, positioning is carried out multiple times, to realize correct assembly.Engine cylinder body is equipped with body main bearing seat, body main bearing seat is equipped with main bearing bolt hole and positioning pin sleeve installation hole.When the main bearing cover of engine is installed on body main bearing seat, positioning pin sleeve installation hole is equipped on main bearing cover, positioning pin is equipped on body main bearing seat, positioning pin is positioned in positioning pin sleeve installation hole, to realize the positioning of main bearing cover and body main bearing seat, main bearing bolt is also cooperated with body main bearing bolt hole on body main bearing seat through main bearing bolt hole, to realize the connection between main bearing cover and body main bearing seat.

[0003] However, positioning pin sleeve installation hole and main bearing bolt are coaxial in prior art, so main bearing cover can be installed in positive direction or reverse direction, main bearing cover is combined machining, and there is positive direction or reverse direction installation demand, so prior art usually processes installation mark on main bearing cover to prevent mistake, structure is relatively complex, increase manufacturing cost and assembly difficulty, and positioning precision is required high during assembly, assembly efficiency is low and prone to error. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a kind of main bearing cover mistake proofing structure and engine, to solve the complex structure problem of preventing mistake in prior art by processing installation mark on main bearing cover.

[0005] In order to realize the above-mentioned purpose, according to one aspect of the utility model, a kind of main bearing cover mistake proofing structure is provided, including: first installation hole, for installing positioning pin sleeve, first installation hole includes first sub-hole and second sub-hole, which are communicated with each other, first sub-hole and second sub-hole are respectively arranged on main bearing cover and the main bearing seat of body;Second installation hole includes first segmented hole and second segmented hole, first segmented hole is arranged on main bearing cover and communicated with first sub-hole, second segmented hole is arranged on main bearing seat and communicated with second sub-hole;Wherein, the axis of first segmented hole and first sub-hole is different, the axis of second segmented hole and second sub-hole is different;When main bearing cover is assembled with main bearing seat along first direction, the axis of first segmented hole and second segmented hole is same.

[0006] Further, the hole diameter R1 of first sub-hole and second sub-hole is same and satisfies: 13mm≤R1≤27mm.

[0007] Further, the hole diameter R2 of second segmented hole satisfies: 7mm≤R2≤19mm.

[0008] Further, the first segmented hole has a hole diameter R3 satisfying 8mm≤R3≤20mm.

[0009] Further, the minimum distance H1 between the first segmented hole and the outer hole wall of the first sub-hole satisfies H1≥h.

[0010] Further, the minimum distance H2 between the second segmented hole and the outer hole wall of the second sub-hole satisfies H2≥h.

[0011] Further, the first segmented hole is a through hole; and / or, the second segmented hole is a threaded hole.

[0012] Further, the main bearing cover mistake-proof assembly structure further comprises a connecting bolt, which is sequentially arranged in the first segmented hole, the positioning pin sleeve and the second segmented hole when the main bearing cover is assembled with the main bearing seat along the first direction.

[0013] Further, the positioning pin sleeve is connected with the first sub-hole and the second sub-hole in an interference fit respectively.

[0014] According to another aspect of the present application, an engine is provided, comprising the above-mentioned main bearing cover mistake-proof assembly structure.

[0015] The technical scheme of the present application provides a main bearing cover mistake-proof assembly structure, which comprises a first installation hole and a second installation hole; the first installation hole is used for installing a positioning pin sleeve, and the first installation hole comprises a first sub-hole and a second sub-hole which are in communication with each other, and the first sub-hole and the second sub-hole are respectively arranged on a main bearing cover and a main bearing seat of a machine body; the second installation hole comprises a first segmented hole and a second segmented hole, the first segmented hole is arranged on the main bearing cover and is in communication with the first sub-hole, and the second segmented hole is arranged on the main bearing seat and is in communication with the second sub-hole; wherein, the first segmented hole is arranged differently from the axis of the first sub-hole, and the second segmented hole is arranged differently from the axis of the second sub-hole; when the main bearing cover is assembled with the main bearing seat along a first direction, the axes of the first segmented hole and the second segmented hole are the same.

[0016] In this way, since the first segmented hole is arranged differently from the axis of the first sub-hole, and the second segmented hole is arranged differently from the axis of the second sub-hole, only when the main bearing cover is correctly assembled with the main bearing seat along a specific first direction, the axes of the first segmented hole and the second segmented hole can be aligned. This ensures the correct pairing between the main bearing cover and the main bearing seat, effectively preventing misassembly. Compared with the traditional method of machining and installing a mark on the main bearing cover, the use of this mistake-proof assembly structure reduces the need for additional marks, simplifies the manufacturing process, thereby reducing production costs and assembly difficulty, and further solves the problem of complex structure in the prior art for preventing misassembly by machining and installing a mark on the main bearing cover. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application. In the drawings:

[0018] Figure 1 A structure schematic diagram provided by an embodiment of the main bearing cover mistake-proof mounting structure according to the present application is shown;

[0019] Figure 2 A side sectional view when the main bearing cover is mounted wrongly provided by an embodiment of the main bearing cover mistake-proof mounting structure according to the present application is shown.

[0020] Figure 3 A bottom surface view of the main bearing cover provided by an embodiment of the engine according to the present application is shown;

[0021] Figure 4 A bottom surface view of the main bearing seat provided by an embodiment of the engine according to the present application is shown;

[0022] Figure 5 A side sectional view when the main bearing cover is mounted wrongly provided by an embodiment of the main bearing cover mistake-proof mounting structure according to the present application is shown.

[0023] Among the above drawings, the following reference signs are included:

[0024] 1, main bearing cover; 2, main bearing seat; 10, first mounting hole; 11, positioning pin sleeve; 12, first sub-hole; 13, second sub-hole; 20, second mounting hole; 21, first segmented hole; 22, second segmented hole; 30, connecting bolt. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] In order to solve the problem of complex structure in the prior art by machining a mounting mark on the main bearing cover to prevent wrong mounting, the present application provides a main bearing cover mistake-proof mounting structure and an engine.

[0027] Please refer to Figures 1 to 5The utility model provides a kind of main bearing cover 1 mistake-proof structure, including first mounting hole 10 and second mounting hole 20;First mounting hole 10 is used to install positioning pin sleeve 11, first mounting hole 10 includes first sub-hole 12 and second sub-hole 13 that are interconnected, first sub-hole 12 and second sub-hole 13 are correspondingly arranged on main bearing cover 1 and the main bearing seat 2 of body respectively;Second mounting hole 20 includes first segmented hole 21 and second segmented hole 22, first segmented hole 21 is arranged on main bearing cover 1 and is communicated with first sub-hole 12, and second segmented hole 22 is arranged on main bearing seat 2 and is communicated with second sub-hole 13;Wherein, the axis of first segmented hole 21 and first sub-hole 12 is different, and the axis of second segmented hole 22 and second sub-hole 13 is different;When main bearing cover 1 is assembled along first direction with main bearing seat 2, the axis of first segmented hole 21 and second segmented hole 22 is same.

[0028] In the aspect of the technical scheme of the utility model, since the axis of first segmented hole 21 and first sub-hole 12 is different, and the axis of second segmented hole 22 and second sub-hole 13 is different, only when main bearing cover 1 is correctly assembled along the specific first direction with main bearing seat 2, the axis of first segmented hole 21 and second segmented hole 22 can be aligned, to ensure the correct pairing between main bearing cover 1 and main bearing seat 2, effectively prevent misassembly.

[0029] In the present application, the first direction is the direction of correct connection of main bearing cover 1 and main bearing seat 2.

[0030] In the embodiment, the hole diameter R1 of first sub-hole 12 and second sub-hole 13 is same and satisfies: 13mm≤R1≤27mm.Through the above setting, first sub-hole 12 and second sub-hole 13 with same hole diameter and hole diameter R1 satisfying the above value range can make first mounting hole 10 adapt to positioning pin sleeve 11 of different size, to affect the fastening degree and positioning accuracy of positioning pin sleeve 11, to meet the assembly requirement of most engine main bearing cover 1, so that the mistake-proof structure can be widely applied to different models or sizes of engine, improve the versatility and flexibility of design.

[0031] It should be noted that, in the present application, the hole diameter of first mounting hole 10 for installing positioning pin sleeve 11 is larger than the conventional positioning pin sleeve 11 mounting hole, so that the contact area of main bearing cover 1 and main bearing seat 2 is reduced, and the surface pressure is increased, which is beneficial to prevent the sliding of main bearing cover 1.

[0032] In the embodiment, the hole diameter R2 of the second segmented hole 22 satisfies: 7mm≤R2≤19mm. By setting the range of the hole diameter R2, it helps to ensure that the connecting bolt 30 can be accurately and correctly threaded in the second segmented hole 22 after passing through the first segmented hole 21, and cooperates with the positioning pin sleeve 11 to make the main bearing cover 1 correctly and stably connected with the main bearing seat 2, and avoids the positioning deviation caused by size mismatch during assembly. Moreover, the hole diameter in the range can match the commonly used connecting bolt 30 specifications, avoiding the need to customize the bolt due to special hole diameter size, thereby reducing material cost and assembly complexity.

[0033] In the embodiment, the hole diameter R3 of the first segmented hole satisfies: 8mm≤R3≤20mm. By setting the appropriate hole diameter range, the connecting bolt 30 can pass through the first segmented hole 21 and the second segmented hole 22 for cooperation and connection without interference, reducing assembly difficulty, while providing sufficient space to ensure alignment and positioning during assembly, reducing structural problems caused by assembly errors. Moreover, it can adapt to different model sizes of connecting bolts 30, ensuring the stability of the connection, and not causing the connection strength to decrease due to the hole diameter being too large.

[0034] Specifically, the minimum distance H1 between the first segmented hole 21 and the outer hole wall of the first sub-hole 12 and the wall thickness h of the positioning pin sleeve 11 satisfies: H1≥h. By setting the above, the positioning pin sleeve 11 will not interfere with the hole wall of the first segmented hole 21 during installation, allowing the connecting bolt 30 to move smoothly in the first segmented hole 21 and the positioning pin sleeve 11, thereby simplifying the assembly process. At the same time, it can also ensure that the material around the positioning pin sleeve 11 has sufficient thickness, which helps to improve the structural strength and wear resistance of the connection between the main bearing cover 1 and the positioning pin sleeve 11, prolonging the service life of the component. Moreover, the positioning pin sleeve 11 can be more stable in the first sub-hole 12, avoiding the positioning pin sleeve 11 from shaking or shifting in the hole due to the wall thickness being too thin, ensuring accurate positioning between the main bearing cover 1 and the main bearing seat 2.

[0035] Preferably, the minimum distance H1 between the first segmented hole 21 and the outer hole wall of the first sub-hole 12 is the same as the wall thickness h of the positioning pin sleeve 11. In this way, the inner wall of the positioning pin sleeve 11 and the hole wall of the first sub-hole 12 are in the same plane, so that the connecting bolt 30 can pass through the first segmented hole 21 and the positioning pin sleeve 11 more stably, which helps to ensure the correct alignment of the main bearing cover 1 and the main bearing seat 2, reduces the alignment error during assembly, and makes the overall structure more compact. The precise fit between the hole and the sleeve helps to reduce the overall space occupied. At the same time, the positioning pin sleeve 11 is more stable in the first sub-hole 12 and the first segmented hole 21, reducing the impact on the stability of the connection between the main bearing cover 1 and the main bearing seat 2 due to the shaking of the positioning pin sleeve 11, and improving the reliability of the engine operation.

[0036] Specifically, the minimum distance H2 between the second segmented hole 22 and the outer hole wall of the second sub-hole 13 is greater than or equal to the wall thickness h of the positioning pin sleeve 11, that is, H2≥h. Through the above arrangement, it is ensured that the positioning pin sleeve 11 will not interfere with the hole wall of the second segmented hole 22 during assembly in the second sub-hole 13, ensuring smooth assembly and avoiding assembly difficulties or damage due to structural interference. It also helps to accurately control the position of the positioning pin sleeve 11 during assembly, thereby improving the assembly accuracy between the main bearing cover 1 and the main bearing seat 2, and ensuring the stability and efficiency of the engine operation.

[0037] Preferably, the minimum distance H2 between the second segmented hole 22 and the outer hole wall of the second sub-hole 13 is the same as the wall thickness h of the positioning pin sleeve 11. In this way, the inner wall of the positioning pin sleeve 11 and the hole wall of the second sub-hole 13 are in the same plane, so that the connecting bolt 30 can pass through the positioning pin sleeve 11 and the second segmented hole 22 more stably, which ensures that the alignment between the main bearing cover 1 and the main bearing seat 2 is more accurate, reduces the risk of misassembly due to improper clearance. And it ensures the connection strength between the positioning pin sleeve 11 and the hole wall of the second sub-hole 13, while also helping to maintain the stability of the positioning pin sleeve 11 in the second sub-hole 13, reducing the connection slack caused by shaking, and improving the reliability and safety of the engine operation.

[0038] It should be noted that in this application, the hole diameter R1 of the first sub-hole 12 and the second sub-hole 13 and the hole diameter R2 of the first segmented hole 21 and the second segmented hole 22 are selected according to the corresponding specifications and models of the connecting bolt, which can be referred to as follows:

[0039]

[0040] It should be noted that the model of the connecting bolt is not limited to the above.

[0041] In the present application, the first segmented hole 21 is a through hole. Through the above arrangement, the connecting bolt 30 or other connecting member can directly pass through during assembly without the need for additional hole alignment or adjustment, simplifying the assembly process, reducing the assembly difficulty, and improving the assembly efficiency. Moreover, this design reduces the positioning error during assembly, because the connecting bolt 30 can smoothly align with the positioning pin sleeve 11 and the second segmented hole 22 when passing through the through hole, which helps to improve the assembly accuracy between the main bearing cover 1 and the main bearing seat 2.

[0042] In order to facilitate the connecting bolt 30 to pass through the first segmented hole 21 and the second segmented hole 22 respectively, the second segmented hole 22 is a threaded hole. In this way, through the threaded hole and the threaded connection with the connecting bolt 30, higher connection stability can be provided to ensure the stable connection between the main bearing cover 1 and the main bearing seat 2, reducing the possibility of loosening or connection failure due to vibration or high temperature during engine operation.

[0043] Further, the main bearing cover 1 mistake-proof assembly structure further comprises a connecting bolt 30, so that when the main bearing cover 1 is assembled with the main bearing seat 2 along the first direction, the connecting bolt 30 is sequentially arranged in the first segmented hole 21, the positioning pin sleeve 11 and the second segmented hole 22. Through the above arrangement, when the main bearing cover 1 is assembled with the main bearing seat 2 along the correct first direction, the axes of the first segmented hole 21 and the second segmented hole 22 are the same at this time, and by screwing the connecting bolt 30 into the first segmented hole 21 and the second segmented hole 22 which are threaded holes, a stable connection between the main bearing cover 1 and the main bearing seat 2 is achieved, providing assembly accuracy and efficiency.

[0044] Optionally, the positioning pin sleeve 11 is connected with the first sub-hole 12 and the second sub-hole 13 in an interference fit. Through the above arrangement, the structural stability between the positioning pin sleeve 11 and the first sub-hole 12 and the second sub-hole 13 is significantly improved, preventing displacement of the components due to vibration or torque during engine operation.

[0045] On the other hand, the technical scheme of the present application provides an engine comprising the above-mentioned main bearing cover 1 mistake-proof assembly structure. In this way, the introduction of the main bearing cover 1 mistake-proof assembly structure significantly reduces the error rate during assembly, enabling assembly workers to quickly and accurately complete the assembly between the main bearing cover 1 and the main bearing seat 2, thereby improving the overall assembly efficiency. At the same time, by reducing assembly errors, unnecessary damage to the main bearing cover 1 and related components is avoided, thereby prolonging the service life of the engine and improving its durability. Moreover, the mistake-proof assembly structure ensures the correct assembly of the main bearing cover 1, avoiding component wear, excessive heating or functional failure due to assembly errors, and improving the stability and reliability of engine operation.

[0046] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0047] The main bearing cover 1 mistake-proof assembly structure comprises a first mounting hole 10 and a second mounting hole 20; the first mounting hole 10 is used for mounting a positioning pin sleeve 11, and the first mounting hole 10 comprises a first sub-hole 12 and a second sub-hole 13 that are in communication with each other, and the first sub-hole 12 and the second sub-hole 13 are respectively arranged on the main bearing cover 1 and the main bearing seat 2 of the machine body; the second mounting hole 20 comprises a first segmented hole 21 and a second segmented hole 22, the first segmented hole 21 is arranged on the main bearing cover 1 and is in communication with the first sub-hole 12, and the second segmented hole 22 is arranged on the main bearing seat 2 and is in communication with the second sub-hole 13; wherein the first segmented hole 21 is arranged differently from the axis of the first sub-hole 12, and the second segmented hole 22 is arranged differently from the axis of the second sub-hole 13; when the main bearing cover 1 is assembled with the main bearing seat 2 along a first direction, the axes of the first segmented hole 21 and the second segmented hole 22 are the same. In this way, since the axis of the first segmented hole 21 is different from the axis of the first sub-hole 12, and the axis of the second segmented hole 22 is different from the axis of the second sub-hole 13, only when the main bearing cover 1 is correctly assembled with the main bearing seat 2 along a specific first direction, the axes of the first segmented hole 21 and the second segmented hole 22 can be aligned. This ensures the correct pairing between the main bearing cover 1 and the main bearing seat 2, effectively preventing misassembly. Compared with the traditional method of machining and installing a mark on the main bearing cover 1, the use of this mistake-proof assembly structure reduces the need for additional marks, simplifies the manufacturing process, thereby reducing production costs and assembly difficulty, and further solves the problem of complex structure in the prior art for preventing misassembly by machining and installing a mark on the main bearing cover 1.

[0048] It is to be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0049] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically indicated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion. The techniques, methods, and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the authorized description under appropriate circumstances. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so further discussion is not needed in subsequent drawings once an item is defined in one drawing.

[0050] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0051] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used here to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.

[0052] The above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A main bearing cover anti-misinstallation structure, characterized in that, include: The first mounting hole (10) is used to install the positioning pin sleeve (11). The first mounting hole (10) includes a first sub-hole (12) and a second sub-hole (13) that are interconnected. The first sub-hole (12) and the second sub-hole (13) are respectively provided on the main bearing cover (1) and the main bearing seat (2) of the machine body. The second mounting hole (20) includes a first segmented hole (21) and a second segmented hole (22). The first segmented hole (21) is disposed on the main bearing cover (1) and communicates with the first sub-hole (12). The second segmented hole (22) is disposed on the main bearing seat (2) and communicates with the second sub-hole (13). The first segmented hole (21) and the first sub-hole (12) are set with different axes, and the second segmented hole (22) and the second sub-hole (13) are set with different axes; when the main bearing cover (1) is assembled with the main bearing seat (2) along the first direction, the first segmented hole (21) and the second segmented hole (22) are set with the same axis.

2. The main bearing cover anti-misinstallation structure according to claim 1, characterized in that, The first sub-hole (12) and the second sub-hole (13) have the same diameter R1 and satisfy: 13mm≤R1≤27mm.

3. The main bearing cover anti-misinstallation structure according to claim 1, characterized in that, The diameter R2 of the second segmented hole (22) satisfies: 7mm≤R2≤19mm.

4. The main bearing cover anti-misinstallation structure according to claim 1, characterized in that, The diameter R3 of the first segmented hole (21) satisfies: 8mm≤R3≤20mm.

5. The main bearing cover anti-misinstallation structure according to claim 1, characterized in that, The minimum distance H1 between the outer wall of the first segmented hole (21) and the first sub-hole (12) satisfies the following condition: H1≥h.

6. The main bearing cover anti-misinstallation structure according to claim 1, characterized in that, The minimum distance H2 between the outer wall of the second segmented hole (22) and the second sub-hole (13) satisfies the following condition: H2≥h.

7. The main bearing cover anti-misinstallation structure according to claim 1, characterized in that, The first segmented hole (21) is a through hole; and / or, the second segmented hole (22) is a threaded hole.

8. The main bearing cover anti-misinstallation structure according to claim 7, characterized in that, The main bearing cover anti-misalignment structure also includes connecting bolts (30), so that when the main bearing cover (1) is assembled with the main bearing seat (2) along the first direction, the connecting bolts (30) are sequentially inserted into the first segment hole (21), the positioning pin sleeve (11) and the second segment hole (22).

9. The main bearing cover anti-misinstallation structure according to claim 1, characterized in that, The positioning pin sleeve (11) is interference-fitted with the first sub-hole (12) and the second sub-hole (13) respectively.

10. An engine, characterized in that, The main bearing cover anti-misinstallation structure includes any one of claims 1 to 9.

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