Flywheel housing, engine and automobile

Abstract

The utility model relates to the technical field of engine manufacturing, and discloses a flywheel casing, an engine and an automobile, the flywheel casing comprises a flywheel casing main body and a strengthening structure arranged on the flywheel casing main body, the surface of the flywheel casing main body is provided with a cylinder body mounting surface used for connecting an engine cylinder body, an oil pan mounting surface which is vertically jointed with the cylinder body mounting surface and is used for connecting an oil pan, and a starter mounting surface which is positioned at one end of the oil pan mounting surface and is used for connecting a starter, and the reinforcing structure comprises a first reinforcing rib and a second reinforcing rib, the first reinforcing rib is arranged to be adjacent to the cylinder body installation face and the oil pan installation face and located at the end, facing the starter installation face, of the cylinder body installation face. According to the technical scheme, the first reinforcing rib is arranged at the joint of the cylinder body mounting surface, the starter mounting surface and the oil pan mounting surface, so that the fatigue stress value of the joint is greatly reduced, and the risk that the flywheel casing is broken and damaged in the operation process of an engine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engine manufacturing, in particular to a flywheel housing, and also to an engine and a car. Background Art

[0002] The flywheel housing is an important part of the engine, carrying the mass of the gearbox and acting as a fulcrum for power transmission. However, during the use of the flywheel housing, due to the influence of gravity, external force, irregular vibration and other factors, the flywheel housing is inevitably cracked and damaged. In addition, the cracking and damage of the flywheel housing usually occur on its front and rear planes, that is, the contact surface between the flywheel housing and the cylinder block and the gearbox. The cracking and damage of the flywheel housing will affect the parallelism of the relevant parts of the entire power chain, making the flywheel housing bearing hole not concentric with the crankshaft center and the transmission center, causing the engine and the transmission center to be skewed, thereby affecting the power transmission of the engine system. At the same time, it will also increase the wear of the driven part, causing the engine system to produce abnormal transmission noise. In addition, the deformation and misalignment of the front and rear planes of the flywheel housing will also cause unnecessary wear to the parts of the driven part, such as the wear of the clutch plate, the transmission driving wheel shaft and the bearings.

[0003] In the prior art, mesh or annular reinforcing ribs are usually provided on the front and rear planes of the flywheel housing. Although the reinforcing ribs can enhance the overall strength of the front and rear planes of the flywheel housing to a certain extent, the enhancement effect is very limited. Moreover, during the operation of the engine, the joints of the cylinder mounting surface, the starter mounting surface and the oil pan mounting surface of the flywheel housing mainly bear the stress generated by the front and rear acceleration of the gearbox and the starter, so that the fatigue stress value of the joint is the largest, which is often greater than the fatigue limit of the material of the flywheel housing, making the flywheel housing prone to rupture and damage. Utility Model Content

[0004] The utility model aims to overcome the technical problem of excessive fatigue stress of a flywheel housing in the prior art and provides a flywheel housing, an engine and a car.

[0005] A first aspect of the utility model provides a flywheel housing, comprising a flywheel housing main body and a reinforcement structure arranged on the flywheel housing main body, wherein a cylinder mounting surface for connecting to an engine cylinder block, an oil pan mounting surface for connecting to an oil pan and vertically joined to the cylinder mounting surface, and a starter mounting surface for connecting to a starter located at one end of the oil pan mounting surface are formed on the surface of the flywheel housing main body, wherein the reinforcement structure comprises: a first reinforcement rib, the first reinforcement rib is arranged to be adjacent to the cylinder mounting surface and the oil pan mounting surface, and is located at one end of the cylinder mounting surface facing the starter mounting surface.

[0006] In the flywheel housing reinforcement structure provided by the utility model, the first reinforcing rib is arranged to be adjacent to the cylinder mounting surface and the oil pan mounting surface, and is located at one end of the cylinder mounting surface facing the starter mounting surface, that is, the first reinforcing rib is arranged at the junction of the cylinder mounting surface, the starter mounting surface and the oil pan mounting surface, thereby greatly reducing the fatigue stress value of the junction, and making the fatigue stress value of the junction smaller than the fatigue limit of the flywheel housing material, thereby reducing the risk of cracking and damage of the flywheel housing during engine operation.

[0007] Optionally, the joint positions of the cylinder mounting surface and the oil pan mounting surface form a dividing line, and the first reinforcing rib extends in a direction perpendicular to the dividing line.

[0008] Optionally, the first reinforcing rib includes a first sub-reinforcing rib extending toward the cylinder mounting surface and abutting against the side wall of the cylinder mounting surface, and a second sub-reinforcing rib extending away from the cylinder mounting surface and abutting against the fixed fulcrum of the flywheel housing.

[0009] Optionally, an observation window is formed on the flywheel housing below one end of the dividing line close to the starter mounting surface, and one end of the second sub-reinforcement rib abuts against an outer wall of the observation window.

[0010] Optionally, the observation window is a circular hole type.

[0011] Optionally, the thickness of the first reinforcing rib is less than or equal to the smaller one of the thickness of the cylinder mounting surface and the thickness of the starter mounting surface.

[0012] Optionally, the reinforcement structure further includes a second arc-shaped reinforcement rib, and the second reinforcement rib is formed below the oil pan mounting surface.

[0013] Optionally, the reinforcement structure further includes a third inverted “V”-shaped reinforcement rib, and the third reinforcement rib is formed on a side of the cylinder mounting surface and the oil pan mounting surface away from the center of the flywheel housing.

[0014] A second aspect of the utility model provides an engine, the engine comprising the above-mentioned flywheel housing.

[0015] A third aspect of the utility model provides a car, comprising the above-mentioned engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the flywheel housing provided by the utility model;

[0017] Figure 2 It is a brief schematic diagram of the engine provided by the utility model.

[0018] Description of Reference Numerals

[0019] 1-engine block; 2-engine cylinder head; 3-starter; 4-flywheel housing; 41-cylinder block mounting surface; 42-starter mounting surface; 43-oil pan mounting surface; 5-transmission; 6-first reinforcement rib; 7-second reinforcement rib; 8-third reinforcement rib; 9-observation window. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0021] In the present utility model, unless otherwise specified, the directions or positional relationships indicated by terms such as "up, down, left, right, inside, outside, top, bottom" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0022] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. "Include" or "comprising" and other similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of covering other elements.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The flywheel housing disclosed in the present utility model is described below with reference to the accompanying drawings.

[0025] Reference Figure 1 As shown, according to a preferred embodiment of the flywheel housing of the utility model, the flywheel housing includes a flywheel housing body and a reinforcing structure arranged on the flywheel housing body, and a cylinder mounting surface 41 for connecting to the engine cylinder block 1, an oil pan mounting surface 43 for connecting to the oil pan and vertically connected to the cylinder mounting surface 41, and a starter mounting surface 42 for connecting to the starter 3 located at one end of the oil pan mounting surface 43 are formed on the surface of the flywheel housing body, wherein the reinforcing structure includes: a first reinforcing rib 6, the first reinforcing rib 6 is arranged to be adjacent to the cylinder mounting surface 41 and the oil pan mounting surface 43, and is located at one end of the cylinder mounting surface 41 facing the starter mounting surface 42.

[0026] Specifically, combined Figure 1 As shown, the oil pan mounting surface 43 is joined with the lower end of the cylinder mounting surface 41, and the oil pan mounting surface 43 is perpendicular to the cylinder mounting surface 41, and the first reinforcing rib 6 is arranged at the joint and extends to the end of the cylinder mounting surface 41, and the end faces the starter mounting surface 42, that is, Figure 1 As shown, the starter mounting surface 42 is arranged on the right side of the cylinder mounting surface 41, and the first reinforcing rib 6 is arranged at the right end of the lower part of the cylinder mounting surface 41. That is to say, the first reinforcing rib 6 is arranged at the junction of the cylinder mounting surface 41, the starter mounting surface 42 and the oil pan mounting surface 43, thereby greatly reducing the magnitude of the fatigue stress value at the junction, and making the magnitude of the fatigue stress at the junction smaller than the fatigue limit value of the material of the flywheel housing 4, thereby reducing the risk of cracking and damage of the flywheel housing 4 during the operation of the engine.

[0027] Optionally, the first reinforcing rib 6 can extend in any direction, that is, Figure 1 As shown in FIG. 1 , the joint positions of the cylinder body mounting surface 41 and the oil pan mounting surface 43 form a dividing line, and the first reinforcing rib 6 can extend in any direction with respect to the dividing line. Figure 1 As shown, there is a lack of support below the oil pan mounting surface 43, so that during the actual operation of the flywheel housing 4, the oil pan mounting surface 43 is more likely to be cracked and damaged. Therefore, the first reinforcing rib 6 preferably extends in a direction perpendicular to the dividing line to increase the support strength of the oil pan mounting surface 43.

[0028] Optionally, the first reinforcing rib 6 may include a first sub-reinforcing rib or a second sub-reinforcing rib, wherein Figure 1As shown, the first sub-reinforcement rib starts from the end face of the cylinder mounting surface 41 facing the starter mounting surface 42, extends along a direction perpendicular to the aforementioned dividing line and toward the cylinder mounting surface 41, until it abuts against the side wall of the cylinder mounting surface 41, and the second sub-reinforcement rib starts from the end face of the cylinder mounting surface 41 facing the starter mounting surface 42, extends along a direction perpendicular to the aforementioned dividing line and away from the cylinder mounting surface 41, until it abuts against the fixed fulcrum of the flywheel housing 4, wherein the fixed fulcrum of the flywheel housing 4 may be the outer wall of the observation window 9 described below, or, however, the fixed fulcrum is the wall surface of the outer edge of the flywheel housing 4. Although the above-mentioned first reinforcing rib 6 can reduce the stress load at the junction of the cylinder mounting surface 41, the starter mounting surface 42 and the oil pan mounting surface 43 on the flywheel housing 4 to a certain extent, the first reinforcing rib 6 may still fail to meet the design requirements, so that the stress load at the junction cannot be reduced to the fatigue limit of the material. Therefore, preferably, the first reinforcing rib 6 at least includes a first sub-reinforcing rib and a second sub-reinforcing rib.

[0029] It should be noted that, in actual production, in order to facilitate the first sub-reinforcement rib to abut against the side wall of the cylinder mounting surface 41, and the second sub-reinforcement rib to be connected to the fixed fulcrum of the flywheel housing 4, the extension direction of the first sub-reinforcement rib and / or the second sub-reinforcement rib is not strictly perpendicular to the aforementioned dividing line.

[0030] In addition, the finite element analysis method is used in combination with the simulation software workbench to analyze and compare the stress distribution of the flywheel housing 4 in the two cases where the first reinforcing rib 6 is not set and the first reinforcing rib 6 is set. Among them, when the first reinforcing rib 6 is not set, the maximum fatigue stress value of the flywheel housing body is located at the rounded end of the cylinder mounting surface 41 adjacent to the oil pan mounting surface 43 and facing the starter mounting surface 42. The fatigue stress value at this location is 111.53MPa, which is higher than the fatigue limit of the material, making the flywheel housing 4 prone to rupture and damage during use; when the first reinforcing rib 6 is set at the maximum fatigue stress value, the fatigue stress value at this location is 70.40MPa, which is lower than the fatigue limit of the material, reducing the risk of rupture and damage of the flywheel housing 4 during use.

[0031] Optionally, an observation window 9 is formed below one end of the flywheel housing 4 located at the dividing line close to the starter mounting surface 42, and the observation window is used to observe the ignition status of the starter 3, and one end of the second sub-reinforcement rib abuts against the outer wall of the observation window 9. The shape of the observation window 9 is a round hole type or a square type.

[0032] In addition, the thickness of the first reinforcing rib 6 is less than or equal to the smaller of the thickness of the cylinder mounting surface 41 and the thickness of the starter mounting surface 42, so that there is no gap between the cylinder mounting surface 41 and the engine cylinder block 1, and between the starter mounting surface 42 and the starter 3, thereby ensuring the installation effect between the engine cylinder block 1 and the starter 3 and the flywheel housing 4.

[0033] Optionally, refer to Figure 1 As shown, the reinforcement structure further includes an arc-shaped second reinforcement rib 7 , which is formed below the oil pan mounting surface 43 to enhance the strength of the flywheel housing body below the oil pan mounting surface 43 .

[0034] Optionally, refer to Figure 1 As shown, the reinforcement structure also includes an inverted "V"-shaped third reinforcement rib 8, which is formed on the side of the cylinder mounting surface 41 and the oil pan mounting surface 43 away from the center of the flywheel housing 4, that is, the third reinforcement rib 8 is formed on the outer side of the cylinder mounting surface 41 and the oil pan mounting surface 43 away from the center of the flywheel housing 4, so as to improve the strength of the outer area of ​​the flywheel housing body.

[0035] In addition, the utility model also provides an engine, referring to Figure 2 As shown, the engine includes an engine block 1, an engine cylinder head 2, a starter 3, an oil pan, a gearbox 5 and the above-mentioned flywheel housing 4. Among them, the engine block 1 is connected to the cylinder block mounting surface 41 of the flywheel housing body, the engine cylinder head 2 is sealed to the upper part of the engine block 1, the starter 3 is connected to the starter mounting surface 42 of the flywheel housing body, and the oil pan is connected to the oil pan mounting surface 43 of the flywheel housing body. The above-mentioned cylinder block mounting surface 41, starter mounting surface 42 and oil pan mounting surface 43 are formed on one side of the flywheel housing body, and a gearbox mounting surface for mounting the gearbox 5 is formed on the other side of the flywheel housing body. The crankshaft of the engine block 1 passes through the crankshaft hole in the center of the flywheel housing body and is in driving connection with the gearbox 5.

[0036] On this basis, the utility model also provides a car, which includes the above-mentioned engine.

[0037] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A flywheel housing (4), characterized in that: The flywheel housing comprises a main body and a reinforcement structure arranged on the main body, wherein a cylinder mounting surface (41) for connecting to an engine cylinder block (1), an oil pan mounting surface (43) vertically connected to the cylinder mounting surface (41) for connecting to an oil pan, and a starter mounting surface (42) located at one end of the oil pan mounting surface (43) for connecting to a starter (3) are formed on the surface of the main body, and the reinforcement structure comprises: A first reinforcing rib (6), the first reinforcing rib (6) being arranged adjacent to the cylinder mounting surface (41) and the oil pan mounting surface (43), and being located at one end of the cylinder mounting surface (41) facing the starter mounting surface (42).

2. The flywheel housing (4) according to claim 1, characterized in that: The joint positions of the cylinder body mounting surface (41) and the oil pan mounting surface (43) form a dividing line, and the first reinforcing rib (6) extends in a direction perpendicular to the dividing line.

3. The flywheel housing (4) according to claim 2, characterized in that: The first reinforcing rib (6) comprises a first sub-reinforcing rib extending toward the cylinder mounting surface (41) and abutting against a side wall of the cylinder mounting surface (41), and a second sub-reinforcing rib extending toward a direction away from the cylinder mounting surface (41) and abutting against a fixed fulcrum of the flywheel housing (4).

4. The flywheel housing (4) according to claim 3, characterized in that: An observation window (9) is formed on the flywheel housing (4) below one end of the boundary line close to the starter mounting surface (42), and one end of the second sub-reinforcement rib abuts against an outer wall of the observation window (9).

5. The flywheel housing (4) according to claim 4, characterized in that: The observation window (9) is a circular hole type.

6. The flywheel housing (4) according to claim 2, characterized in that: The thickness of the first reinforcing rib (6) is less than or equal to the smaller of the thickness of the cylinder mounting surface (41) and the thickness of the starter mounting surface (42).

7. The flywheel housing (4) according to claim 1, characterized in that: The reinforcement structure further comprises a second arc-shaped reinforcement rib (7), wherein the second reinforcement rib (7) is formed below the oil pan mounting surface (43).

8. The flywheel housing (4) according to claim 1, characterized in that: The reinforcement structure further comprises a third inverted V-shaped reinforcement rib (8), wherein the third reinforcement rib (8) is formed on a side of the cylinder mounting surface (41) and the oil pan mounting surface (43) away from the center of the flywheel housing (4).

9. An engine, characterized in that: The engine comprises a flywheel housing (4) as claimed in any one of claims 1 to 8.

10. An automobile, characterized in that: The automobile comprises the engine of claim 9.

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