Crankcase, engine and vehicle

Abstract

The crankcase comprises a cylinder body and a bearing seat, an oil seal hole is formed in the end face of one end, in the first direction, of the cylinder body, and the cylinder body further comprises a rear end mounting seat; the bearing seat is embedded into the rear-end mounting seat, a mounting hole penetrating in the first direction is formed in the bearing seat, at least part of the rear-end mounting seat is embedded into the mounting hole and provided with an oil discharge hole, the oil seal hole is communicated with the oil discharge hole, and the oil discharge hole penetrates through the rear-end mounting seat in the first direction. A bearing seat is provided with a bearing hole and a mounting hole which are through in the first direction, a rear-end mounting seat is embedded into the mounting hole, the rear-end mounting seat is further provided with an oil discharge hole, and the oil discharge hole is formed in the rear-end mounting seat embedded into the mounting hole. The engine oil stored between the bearing seat and the oil seal hole can flow back into the crankcase through the oil discharge hole formed in the rear end installation seat, the oil discharge hole is only formed in the rear end installation seat, machining is convenient, and cutting is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a crankcase, an engine and a vehicle. Background Art

[0002] The crankshaft is the main rotating part of the engine. After the connecting rod is installed, it can bear the up and down movement of the connecting rod and convert it into rotational motion. In the actual operation of the engine, due to the increase in the clearance between the crankshaft's main journal and the bearing shell after wear, the coaxiality deviation becomes larger, and the crankshaft moves axially, causing too much oil to be stored between the bearing seat and the oil seal hole. The continuous accumulation of oil will cause oil leakage in the engine, and it is necessary to open an oil discharge hole to discharge the oil into the crankcase.

[0003] The existing oil discharge hole needs to be cut on the bearing seat and the cylinder body when it is opened, which is troublesome to process. Utility Model Content

[0004] The utility model aims to provide a crankcase, an engine and a vehicle, which can solve the problem of troublesome processing of oil discharge holes.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In the first aspect, the utility model provides a crankcase, including a cylinder body and a bearing seat, wherein an oil seal hole is provided on an end face of one end of the cylinder body in a first direction, and the cylinder body also includes a rear end mounting seat; the bearing seat is embedded in the rear end mounting seat, and the bearing seat is provided with a mounting hole that passes through along the first direction, at least a portion of the rear end mounting seat is embedded in the mounting hole and is provided with an oil unloading hole, the oil seal hole is connected to the oil unloading hole, and the oil unloading hole passes through the rear end mounting seat along the first direction.

[0007] In one embodiment, the bearing seat includes a base and a bearing shell, the bearing shell is connected to the base, the mounting hole is opened in the base, and the rear end mounting seat covers at least a portion of the surface of the base in the first direction.

[0008] In one embodiment, the cylinder body also includes a shell, the rear end mounting seat includes a first main body portion, a connecting portion, and a second main body portion arranged in sequence in a second direction, the second direction intersects with the first direction, the bearing seat is arranged between the first main body portion and the second main body portion, the connecting portion covers the base in the first direction and is embedded in the mounting hole, and the oil unloading hole passes through the connecting portion at the mounting hole.

[0009] In one embodiment, the thickness of the base in the first direction is smaller than the thickness of the bearing bushing, and the connecting portion is flush with the surface of the bearing bushing in the first direction.

[0010] In one embodiment, the bearing shell is formed with a bearing hole, the bearing hole is suitable for installing a crankshaft, the outer diameter of the crankshaft neck of the crankshaft is D1, the inner diameter of the bearing hole is D2, and the radius of the oil unloading hole is R1, satisfying: R1*R1*π≥(D2*D2-D1*D1)*π / 4.

[0011] In one embodiment, the crankcase further includes an oil pan, which is connected to the cylinder block in a third direction. In the third direction, the point on the inner wall of the oil seal hole closest to the oil pan is a positioning point, and the distance from the center of the oil discharge hole to the positioning surface is a first distance H. The positioning surface is perpendicular to the third direction, and the positioning point is located on the positioning surface. The first distance H satisfies: H≤R2-R2*cosα,

[0012] Wherein, R2 is the radius of the oil seal hole, and α is the angle between the line connecting the center of the oil unloading hole and the center of the oil seal hole and the line connecting the center of the oil seal hole and the positioning point.

[0013] In one implementation, the first distance H satisfies: 0<H≤15mm.

[0014] In one embodiment, there are multiple mounting holes, and the multiple mounting holes are arranged at intervals.

[0015] In a second aspect, the utility model further provides an engine, comprising an oil seal and a crankcase as described in any one of the various embodiments of the first aspect, wherein the oil seal is installed in an oil seal hole of the crankcase.

[0016] In a third aspect, the utility model further provides a vehicle, comprising a vehicle body and the engine as described in the second aspect, wherein the engine is connected to the vehicle body.

[0017] By setting a rear end mounting seat of the bearing seat embedded in the cylinder body, the bearing seat is provided with a bearing hole and a mounting hole penetrating along the first direction X, the rear end mounting seat is embedded in the mounting hole, and the rear end mounting seat is also provided with an oil discharge hole, which is provided in the rear end mounting seat embedded in the mounting hole, so that the engine oil stored between the bearing seat and the oil seal hole can flow back into the crankcase through the oil discharge hole provided in the rear end mounting seat, and the oil discharge hole is only provided in the rear end mounting seat, which is convenient for processing and easy to cut. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of a crankcase of an embodiment;

[0020] Figure 2 is a perspective view of a crankcase of an embodiment;

[0021] Figure 3 is a cross-sectional view of a cylinder body and a bearing seat of an embodiment;

[0022] Figure 4 yes Figure 1 Sectional view at AA in the middle;

[0023] Figure 5 The diagram is a schematic diagram of the location of the oil unloading hole in an embodiment.

[0024] Description of reference numerals:

[0025] 100-crankcase;

[0026] 10-cylinder body, 11-oil seal hole, 111-positioning surface, 12-rear end mounting seat, 121-oil discharge hole, 122-first main body, 123-connecting part, 124-second main body, 13-housing, 14-front end mounting seat, 15-middle mounting seat;

[0027] 20-bearing seat, 21-bearing hole, 22-mounting hole, 23-base, 24-bearing shoe;

[0028] 30-Oil sump;

[0029] 200-Oil seal;

[0030] 300-crankshaft;

[0031] H is the first distance, R2 is the radius of the oil seal hole, and α is the angle between the line connecting the center of the oil unloading hole and the center of the oil seal hole and the line connecting the center of the oil seal hole and the positioning point. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0035] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0036] An embodiment of the utility model provides a vehicle, comprising a vehicle body and an engine in the embodiment of the utility model, wherein the engine is connected to the vehicle body.

[0037] Optionally, the vehicle may be an electric vehicle, a gasoline vehicle, or a gasoline-electric hybrid vehicle, and the vehicle may be a sedan, an off-road vehicle, etc. The vehicle may be divided into mini vehicles, light vehicles, mid-size vehicles, and high-end vehicles, etc. according to the displacement of the engine, and there is no specific limitation.

[0038] Optionally, the vehicle body is made of a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, carbon fiber, etc. Metal materials include aluminum, aluminum alloys, magnesium alloys, iron and iron alloys, etc. The vehicle body is a split structure, with multiple parts connected and fixed by welding, bonding, clamping, screwing, etc.

[0039] Optionally, the engine and the vehicle body may be connected by welding, bonding, clamping, screwing, etc., without specific limitation.

[0040] The embodiment of the utility model can solve the oil leakage problem of the vehicle engine by adopting the engine in the embodiment of the utility model.

[0041] Please refer to Figure 1 The embodiment of the utility model further provides an engine, comprising an oil seal 200 and a crankcase 100 in the embodiment of the utility model, wherein the oil seal 200 is installed in the oil seal hole 11 of the crankcase 100 .

[0042] Optionally, the engine can be a four-cylinder engine, a six-cylinder engine, an eight-cylinder engine, a ten-cylinder engine, a twelve-cylinder engine, etc., without limitation.

[0043] Optionally, the oil seal 200 is a rotating shaft lip oil seal 200 commonly used in the art, and the material may be nitrile rubber, silicone rubber, etc., without specific limitation.

[0044] The engine in the embodiment of the utility model adopts the crankcase 100 in the embodiment of the utility model, and the oil seal 200 is connected to the oil seal hole 11, which can prevent oil from overflowing from the crankshaft joint of the crankcase 100 and keep the lubricating oil in the crankcase 100 from leaking.

[0045] The crankcase 100 in the embodiment of the utility model is described in detail below.

[0046] Define the direction first. Please refer to Figure 1 , the first direction is X, the second direction is Y, and the third direction is Z.

[0047] Please refer to Figure 1 The embodiment of the utility model provides a crankcase 100, comprising a cylinder block 10 and a bearing seat 20. The cylinder block 10 has an oil seal hole 11 formed on an end surface at one end in a first direction X, and the cylinder block 10 includes a rear end mounting seat 12.

[0048] Optionally, the cylinder body 10 includes an upper cylinder body and a lower cylinder body. The cylinder body 10 may be an integrated structure, that is, the upper cylinder body and the lower cylinder body are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc., without limitation. The cylinder body 10 may also be a split structure, and the upper cylinder body and the lower cylinder body may be connected and fixed by welding, bonding, clamping, screwing, etc.

[0049] Optionally, the upper cylinder body and the lower cylinder body are spliced ​​in a third direction Z to form the cylinder body 10 .

[0050] Optional, such as Figure 2 As shown, the cylinder body 10 includes a rear end mounting seat 12 , and the oil seal hole 11 is communicated with the rear end mounting seat 12 .

[0051] Optional, such as Figure 2 As shown, the cylinder body 10 further includes a front end mounting seat 14 , and the front end mounting seat 14 and the rear end mounting seat 12 are spaced apart in the first direction X.

[0052] Optionally, the cylinder body 10 further includes an intermediate mounting seat 15 , which is disposed between the front mounting seat 14 and the rear mounting seat 12 in the first direction X. There may be one or more intermediate mounting seats 15 , and there is no specific limitation thereto.

[0053] Optionally, the oil seal hole 11 is used to install the oil seal 200 , and the shape of the oil seal hole 11 corresponds to the oil seal 200 .

[0054] The bearing seat 20 is embedded in the rear end mounting seat 12. The bearing seat 20 is provided with a bearing hole 21 and a mounting hole 22 that penetrate along the first direction. At least part of the rear end mounting seat 12 is embedded in the mounting hole 22 and is provided with an oil unloading hole 121. The oil seal hole 11 is connected to the oil unloading hole 121. The oil unloading hole 121 penetrates the rear end mounting seat 12 along the first direction X.

[0055] Optionally, the engine further includes a crankshaft 300, and the bearing hole 21 is used to support the crankshaft.

[0056] Optionally, the bearing seat 20 and the rear end mounting seat 12 can be connected and fixed by welding, bonding, clamping, screwing, etc., without specific limitation.

[0057] Optionally, the bearing seat 20 is made of cast iron, specifically ductile iron, vermicular graphite cast iron, etc., and the rear end mounting seat 12 is made of aluminum alloy, without specific limitation.

[0058] Optionally, the end of the bearing seat 20 away from the bottom is a stepped cross-section. This cross-section design can reduce the weight as much as possible and increase the depth of integration with the aluminum alloy while ensuring a certain strength of the bearing seat 20.

[0059] Optionally, after the bearing seat 20 is embedded in the rear end mounting seat 12, when the next process is executed, the mounting hole 22 is filled with molten aluminum. After the molten aluminum is cooled, an aluminum alloy matrix is ​​formed on the inner wall surface of the mounting hole 22. The aluminum alloy matrix becomes a part of the rear end mounting seat 12, thereby ensuring the bonding strength between the bearing seat 20 and the rear end mounting seat 12.

[0060] Optionally, the shape of the oil unloading hole 121 can be square, circular, polygonal, etc., without specific limitation.

[0061] Optionally, the oil unloading hole 121 is opened in the rear end mounting seat 12 in the mounting hole 22, and the inner wall of the mounting hole 22 is located on the outer circumference of the oil unloading hole 121, ensuring that the oil unloading hole 121 is only opened on the aluminum alloy substrate forming the rear end mounting seat 12 in the mounting hole 22.

[0062] Since the rear end mounting seat 12 is made of aluminum alloy, which is easier to cut than cast iron, tool wear can be reduced when machining the oil unloading hole 121, thereby reducing costs.

[0063] Optionally, there are multiple mounting holes 22, and the multiple mounting holes 22 are arranged at intervals.

[0064] Optionally, there are two mounting holes 22 , which are arranged on both sides of the bearing hole 21 in the second direction Y.

[0065] Optionally, the number of the mounting holes 22 may be 2, 3, 4, etc., without specific limitation.

[0066] By providing a plurality of mounting holes 22, the plurality of mounting holes 22 are arranged at intervals, which can increase the bonding strength and reduce the weight. At the same time, the oil discharge hole 121 is opened in the base of the rear end mounting seat 12 in the mounting hole 22. Since the material of the rear end mounting seat 12 is aluminum alloy, which is easier to cut than cast iron, the tool loss can be reduced when machining the oil discharge hole 121, thereby reducing the cost.

[0067] The crankshaft 300 is the main rotating part of the engine. After the connecting rod is installed, it can bear the up and down movement of the connecting rod and convert it into rotational motion. The crankshaft 300 is made of carbon structural steel or ductile iron, and the crankshaft 300 has a main journal and a connecting rod journal. The lubrication of the crankshaft 300 is mainly completed by the circulation system in the engine, and engine oil and grease are usually used as lubricants. The engine oil circulates in the engine cylinder 10, which can effectively reduce the friction of the components of the engine crankshaft 300 under high-speed movement and reduce the wear of the components.

[0068] In actual operation of the engine, due to the increase in the clearance between the main journal of the crankshaft 300 and the bearing seat 20 after wear, the coaxiality deviation becomes larger, which increases the axial clearance of the crankshaft 300 and causes the axial movement of the crankshaft 300, which will cause excessive oil to be stored between the bearing seat 20 and the mounting hole 22 of the oil seal 200. The continuous accumulation of oil will cause oil leakage in the engine.

[0069] The crankcase 100 in the embodiment of the utility model is provided with a bearing seat 20 embedded in the rear end mounting seat 12 of the cylinder body 10, the bearing seat 20 is provided with a bearing hole 21 and a mounting hole 22 penetrating along the first direction X, the rear end mounting seat 12 is embedded in the mounting hole 22, and the rear end mounting seat 12 is also provided with an oil discharge hole 121, the oil discharge hole 121 is provided in the rear end mounting seat 12 embedded in the mounting hole 22, so that the oil between the bearing seat 20 and the oil seal hole 11 can flow back into the crankcase 100 through the oil discharge hole 121 provided in the rear end mounting seat 12, and the oil discharge hole 121 is only provided in the rear end mounting seat 12, which is convenient for processing and easy to cut.

[0070] Optional, such as Figure 1 and Figure 4 As shown, the crankcase 100 also includes an oil pan 30. The oil between the bearing seat 20 and the oil seal hole 11 passes through the oil unloading hole 121 and the oil channel in the cylinder body 10, and finally enters the oil pan 30 to complete the oil unloading of the oil seal 200, avoiding the oil leakage problem caused by long-term immersion of the oil seal 200.

[0071] Optionally, the oil pan 30 and the cylinder body 10 may be an integral structure or a split structure, and the oil pan 30 and the cylinder body 10 may be connected and fixed by welding, bonding, clamping, screwing, etc., without specific limitation.

[0072] Optionally, the oil pan 30 is used to seal the crankcase 100 as the outer shell of the oil storage tank, which can prevent impurities from entering, collect and store the lubricating oil flowing back from the friction surfaces of the diesel engine, dissipate part of the heat, and prevent the lubricating oil from oxidizing.

[0073] Optional, such as Figure 3 As shown, the bearing seat 20 includes a base 23 and a bearing shell 24, the bearing shell 24 is connected to the base 23, the mounting hole 22 is opened in the base 23, and the rear end mounting seat 12 covers at least a portion of the surface of the base 23 in the first direction X.

[0074] Optionally, the bearing seat 20 may be an integrated structure, that is, the base 23 and the bearing bush 24 are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc., without limitation. The bearing seat 20 may also be a split structure, and the base 23 and the bearing bush 24 may be connected and fixed by welding, bonding, clamping, screwing, etc.

[0075] Optionally, the bearing bush 24 encloses the bearing hole 21. The bearing bush 24 is semicircular, and the crankcase 100 further includes a bearing cover, which is spliced ​​with the bearing seat in the third direction Z. The bearing cover is also provided with a bearing bush 24, and the arc surfaces of the two bearing bushes 24 are arranged opposite to each other and together enclose the bearing hole 21, in which the main journal of the crankshaft 300 is accommodated.

[0076] Optionally, the rear end mounting seat 12 can completely cover the surface of the base 23 in the first direction X, or can cover a portion of the surface of the base 23; the rear end mounting seat 12 can cover the surface of the base 23 facing the oil seal hole 11, or can cover two surfaces of the base 23 opposite to each other in the first direction X, without specific limitation.

[0077] When the engine is working, the bearing bush 24 is connected with the main journal of the crankshaft 300 and is easy to wear, so cast iron and other wear-resistant and strong materials are required. The rear end mounting seat 12 is made of aluminum alloy, which can reduce the overall weight of the crankcase 100 and facilitate processing.

[0078] By setting the bearing seat 20 including the base 23 and the bearing shell 24, the bearing shell 24 is connected to the base 23, and the bearing shell 24 encloses the bearing hole 21, the mounting hole 22 is opened in the base 23, and the rear end mounting seat 12 covers at least part of the surface of the base 23 in the first direction X, the overall weight of the crankcase 100 can be reduced while taking into account the strength and wear resistance of the bearing shell 24.

[0079] Optional, such as Figure 2 and Figure 3 As shown, the cylinder body 10 further includes a housing 13 , and the rear end mounting seat 12 includes a first main body portion 122 , a connecting portion 123 , and a second main body portion 124 arranged in sequence in a second direction Y, and the second direction Y intersects with the first direction X.

[0080] Optionally, the second direction Y intersects with the first direction X.

[0081] Optionally, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0082] Optionally, the rear end mounting seat 12 may be an integrated structure, that is, the first main body 122, the connecting portion 123 and the second main body 124 are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc., without limitation. The bearing seat 20 may also be a split structure, and the first main body 122, the connecting portion 123 and the second main body 124 may be connected and fixed by welding, bonding, clamping, screwing, etc.

[0083] Optionally, there is a gap between the first main body 122 and the second main body 124, the bearing seat 20 is arranged between the first main body 122 and the second main body 124, the connecting part 123 covers the base 23 in the first direction X and is embedded in the mounting hole 22, and the oil unloading hole 121 passes through the connecting part 123 at the mounting hole 22.

[0084] Optionally, the bearing seat 20 is arranged in the gap between the first main body 122 and the second main body 124, the base 23 is connected to the first main body 122 and the second main body 124, and the bearing shell 24 is connected to the first main body 122 at one end in the second direction Y and connected to the second main body 124 at the other end.

[0085] Optionally, the connecting portion 123 is formed on the outer surface of the base 23 after cooling through a casting process when the bearing seat 20 is manufactured and the next process is performed. At this time, the base 23 is provided with a mounting hole 22, and the aluminum liquid will flow into the mounting hole 22 and fill the mounting hole 22 to form a part of the connecting portion 123, which is connected with the inner wall of the mounting hole 22, and the oil unloading hole 121 is opened in the part of the connecting portion 123 that fills the mounting hole 22.

[0086] By setting the cylinder body 10 also including a shell 13, the rear end mounting seat 12 includes a first main body portion 122, a connecting portion 123 and a second main body portion 124 arranged in sequence in the second direction Y, and a gap is provided between the first main body portion 122 and the second main body portion 124. The bearing seat 20 is arranged between the first main body portion 122 and the second main body portion 124. The connecting portion 123 covers the base 23 in the first direction and is embedded in the mounting hole 22, thereby improving the bonding strength between the bearing seat 20 and the cylinder body 10.

[0087] Optionally, the thickness of the base 23 in the first direction X is smaller than the thickness of the bearing bush 24 , and the connecting portion 123 is flush with the surface of the bearing bush 24 in the first direction X.

[0088] The thickness of the bearing bush 24 is relatively large, which can increase the contact area between the bearing bush 24 and the main journal of the crankshaft 300, making the connection more stable. The connecting portion 123 is flush with the surface of the bearing bush 24 in the first direction X, that is, the sum of the thickness of the connecting portion 123 and the base 23 in the first direction X is equal to the thickness of the bearing bush 24 in the first direction X, which can enhance the structural strength and enhance the bonding strength between the bearing seat 20 and the cylinder block 10.

[0089] Optionally, the bearing hole 21 is suitable for mounting the crankshaft 300 .

[0090] Optionally, the crankshaft 300 includes components such as a main journal, a connecting rod journal, a crank, a balancing block, etc., and the components can be connected and fixed by welding, bonding, clamping, screwing, etc., without specific limitation.

[0091] Optionally, the main journal is received in the bearing hole, and the outer wall surface of the main journal contacts the bearing bush.

[0092] Optionally, the outer diameter of the main journal of the crankshaft 300 is D1, the inner diameter of the bearing hole 21 is D2, and the radius of the oil discharge hole 121 is R1, satisfying: R1*R1*π≥(D2*D2-D1*D1)*π / 4.

[0093] Optionally, there is a gap between the outer surface of the crankshaft 300 neck and the inner surface of the bearing hole 21 of the crankshaft 300, and the oil will flow out from the gap to between the bearing seat 20 and the oil seal 200. The area of ​​the gap is the difference between the area of ​​the bearing hole 21 and the cross-sectional area of ​​the crankshaft 300 neck in the first direction X, that is, the oil outlet area S1 is (D2*D2-D1*D1)*π / 4. In order to ensure that the oil will not accumulate between the bearing seat 20 and the oil seal 200, the oil return area S2 of the oil discharge hole 121 should be larger than the oil outlet area S1, and the oil should be discharged in time to avoid oil leakage caused by soaking the oil seal 200 for a long time.

[0094] By setting the outer diameter of the crankshaft neck of the crankshaft 300 to D1, the inner diameter of the bearing hole 21 to D2, and the radius of the oil unloading hole 121 to R1, the following condition is satisfied: R1*R1*π≥(D2*D2-D1*D1)*π / 4, so that the oil return area R1*R1*π is greater than or equal to the oil outlet area (D2*D2-D1*D1)*π / 4, thereby avoiding the oil accumulation between the bearing seat 20 and the oil seal 200 and the oil leakage problem caused by long-term immersion of the oil seal 200.

[0095] Optional, such as Figure 5 As shown, the direction from the cylinder body 10 to the oil pan 30 is the third direction Z, the point on the inner wall of the oil seal hole 11 closest to the oil pan 30 is the positioning point, the positioning surface 111 is perpendicular to the third direction Z and the positioning point is located on the positioning surface 111, and the center of the oil unloading hole has a first distance H to the positioning surface 111, satisfying: H≤R2-R2*cosα.

[0096] Wherein, R2 is the radius of the oil seal hole 11, and α is the angle between the line connecting the center of the oil unloading hole 121 and the center of the oil seal hole 11 and the line connecting the center of the oil seal hole 11 and the positioning point.

[0097] Optionally, the radius R2 of the oil seal hole 11 is determined according to the size of the oil seal 200 used in the actual product or the size of the oil seal hole 11 opened in the cylinder body 10, and is not specifically limited.

[0098] In order to prevent the oil from accumulating between the bearing seat 20 and the oil seal 200, the oil discharge hole 121 should be opened as close as possible to the bottom of the oil seal hole 11 to discharge the oil in time and avoid the oil leakage caused by the oil soaking the oil seal 200 for a long time. Figure 5 The shaded part in the figure can be used without any specific limitation.

[0099] By setting it in the orthographic projection of the first direction X, the center of the oil unloading hole 121 has a first distance H to the center of the oil seal hole 11, satisfying: H≤R2-R2*cosα, and determining the opening position of the oil unloading hole 121 according to the radius of the oil seal hole 11, ensuring that the oil unloading hole 121 is opened at a position close to the bottom of the oil seal 200, so that the oil accumulated between the bearing seat 20 and the oil seal 200 can be unloaded in time, avoiding oil leakage caused by long-term immersion of the oil seal 200 in the oil.

[0100] Optionally, the first distance H satisfies: 0<H≤15mm.

[0101] Optionally, the value range of the first distance H satisfies: 0<H≤10mm.

[0102] Optionally, the value of the first distance H may be 6 mm, 8 mm, 10 mm, etc., without specific limitation.

[0103] By setting the first distance H to satisfy: 0<H≤15mm, the oil unloading hole 121 is opened close to the bottom of the oil seal 200, so that the oil accumulated between the bearing seat 20 and the oil seal 200 can be unloaded in time, avoiding oil leakage caused by long-term immersion of the oil seal 200.

[0104] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0105] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A crankcase, characterized in that: include: A cylinder body, wherein an end surface of one end of the cylinder body in the first direction is provided with an oil seal hole, and the cylinder body further comprises a rear end mounting seat; A bearing seat is embedded in the rear end mounting seat, the bearing seat is provided with a mounting hole extending through the first direction, at least a portion of the rear end mounting seat is embedded in the mounting hole and is provided with an oil unloading hole, the oil seal hole is connected to the oil unloading hole, and the oil unloading hole extends through the rear end mounting seat along the first direction.

2. The crankcase according to claim 1, characterized in that The bearing seat includes a base and a bearing shoe, the bearing shoe is connected to the base, the mounting hole is opened in the base, and the rear end mounting seat covers at least a portion of the surface of the base in the first direction.

3. The crankcase according to claim 2, characterized in that: The cylinder body also includes a shell, and the rear end mounting seat includes a first main body portion, a connecting portion, and a second main body portion arranged in sequence in a second direction, the second direction intersects with the first direction, the bearing seat is arranged between the first main body portion and the second main body portion, the connecting portion covers the base in the first direction and is embedded in the mounting hole, and the oil unloading hole passes through the connecting portion at the mounting hole.

4. The crankcase according to claim 3, characterized in that: The thickness of the base in the first direction is smaller than the thickness of the bearing bush, and the connecting portion is flush with the surface of the bearing bush in the first direction.

5. The crankcase according to claim 2, characterized in that: The bearing shell is formed with a bearing hole, and the bearing hole is suitable for installing a crankshaft. The outer diameter of the crankshaft neck of the crankshaft is D1, the inner diameter of the bearing hole is D2, and the radius of the oil unloading hole is R1, satisfying: R1*R1*π≥(D2*D2-D1*D1)*π / 4.

6. The crankcase according to claim 1, characterized in that The crankcase further includes an oil pan, which is connected to the cylinder block in a third direction. In the third direction, the point on the inner wall of the oil seal hole closest to the oil pan is a positioning point. The distance from the center of the oil discharge hole to the positioning surface is a first distance H. The positioning surface is perpendicular to the third direction, and the positioning point is located on the positioning surface. The first distance H satisfies: H≤R2-R2*cosα, Wherein, R2 is the radius of the oil seal hole, and α is the angle between the line connecting the center of the oil unloading hole and the center of the oil seal hole and the line connecting the center of the oil seal hole and the positioning point.

7. The crankcase according to claim 6, characterized in that The first distance H satisfies: 0<H≤15mm.

8. The crankcase according to claim 1, characterized in that There are multiple mounting holes, and the multiple mounting holes are arranged at intervals.

9. An engine, characterized in that: The invention comprises an oil seal and a crankcase according to any one of claims 1 to 8, wherein the oil seal is installed in an oil seal hole of the crankcase.

10. A vehicle, characterized in that: It comprises a vehicle body and the engine as claimed in claim 9, wherein the engine is connected to the vehicle body.

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