Balance shaft upper shell, balance shaft upper shell assembly, balance shaft upper shell assembly, engine, power assembly and vehicle

Abstract

The invention discloses a balance shaft upper shell, a shell and an assembly, an engine, a power assembly and a vehicle, and the balance shaft upper shell comprises an upper shell, a lower shell, a first connecting part and a second connecting part, and the upper shell is provided with a first mounting part used for being connected with a balance shaft lower shell; and the annular reinforcing rib is arranged on the surface, opposite to the balance shaft, of the upper shell, the annular reinforcing rib is connected end to end to form a closed ring shape, and the annular reinforcing rib is arranged around the first mounting part. According to the balance shaft upper shell, the structural strength is higher, abnormal deformation of the first mounting part can be avoided, and the connection strength between the balance shaft upper shell and the balance shaft lower shell can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a balancing shaft upper housing, a housing and an assembly, an engine, a power assembly and a vehicle. Background Art

[0002] The balancing shaft upper housing in the related art is usually provided with a first mounting portion, and the first mounting portion is used to connect with the balancing shaft lower housing. For example, the mounting bolt passes through the first mounting portion and the balancing shaft lower housing to fix the balancing shaft upper housing and the balancing shaft lower housing. However, due to the unreasonable structural setting of the balancing shaft upper housing in the related art, the overall structural strength of the balancing shaft upper housing is low, which can easily cause the balancing shaft upper housing to be deformed by force near the first mounting portion, thereby causing the balancing shaft upper housing to deform. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a balancing shaft upper housing, which has a higher structural strength, can avoid abnormal deformation of the first mounting portion, and is conducive to improving the connection strength between the balancing shaft upper housing and the balancing shaft lower housing.

[0004] The present invention also provides a balancing shaft housing having the balancing shaft upper housing.

[0005] The present invention also provides a balancing shaft assembly having the balancing shaft housing.

[0006] The present invention also provides an engine having the balance shaft assembly.

[0007] The present invention also provides a power assembly having the engine.

[0008] The present invention also provides a vehicle having the above engine or power assembly.

[0009] In order to achieve the above-mentioned purpose, according to a first aspect of the embodiment of the present invention, an upper shell of a balancing shaft is proposed, comprising: an upper shell, the upper shell being provided with a first mounting portion for connecting to a lower shell of the balancing shaft; an annular reinforcing rib, the annular reinforcing rib being provided on a surface of the upper shell facing away from the balancing shaft, the annular reinforcing rib being connected end to end to form a closed ring, and the annular reinforcing rib being provided around the first mounting portion.

[0010] The balancing shaft upper housing according to the embodiment of the present invention has higher structural strength, can avoid abnormal deformation of the first mounting portion, and is beneficial to improving the connection strength between the balancing shaft upper housing and the balancing shaft lower housing.

[0011] According to some embodiments of the present invention, the upper shell is also provided with a second mounting portion for connecting to the lower shell of the balancing shaft, and the second mounting portion is multiple; wherein the first mounting portion is arranged in the middle of the surface of the upper shell facing away from the balancing shaft, and multiple second mounting portions are arranged around the annular reinforcement rib.

[0012] According to some embodiments of the present invention, the upper shell is further provided with a third mounting portion for connecting to a cylinder block of an engine, and there are multiple third mounting portions, and the multiple third mounting portions are arranged around the annular reinforcing rib.

[0013] According to some embodiments of the present invention, there are multiple third mounting parts, and the multiple third mounting parts are distributed in an array.

[0014] According to some embodiments of the present invention, the upper shell has an upper shell gear mounting cavity, and the upper shell gear mounting cavity is used to install the gear; part of the third mounting portion is arranged adjacent to the upper shell gear mounting cavity, and the third mounting portion arranged adjacent to the upper shell gear mounting cavity is constructed as a bolt hole, and the bolt hole is constructed with a waist-shaped hole section, and the waist-shaped hole section is used to position and cooperate with the locating pin of the cylinder body.

[0015] According to some embodiments of the present invention, the balancing shaft upper housing further comprises: a connecting rib, and the annular reinforcing rib and at least one of the plurality of third mounting portions are connected via the connecting rib.

[0016] According to some embodiments of the present invention, the height of the connecting rib gradually increases in a direction away from the annular reinforcing rib.

[0017] According to some embodiments of the present invention, the upper shell has a first direction and a second direction that are orthogonal to each other, and the first direction and the second direction are both orthogonal to the up and down directions. The upper shell of the balance shaft also includes: a first reinforcing rib group, and the third mounting parts adjacent to each other along the second direction are connected by the first reinforcing rib group.

[0018] According to some embodiments of the present invention, the first reinforcing rib group includes a plurality of first reinforcing ribs, and a cavity is formed between the plurality of first reinforcing ribs; wherein the upper shell is also provided with a second mounting portion for connecting to the lower shell of the balancing shaft, and there are a plurality of second mounting portions, the first mounting portion is arranged in the middle of the surface of the upper shell facing away from the balancing shaft, a plurality of second mounting portions are arranged around the annular reinforcing rib, and at least part of the second mounting portions is arranged in the cavity.

[0019] According to some embodiments of the present invention, the distance between the two opposite side walls of the cavity in the first direction gradually increases along the direction from one of the third mounting portions to another of the third mounting portions; or, the distance between the two opposite side walls of the cavity in the first direction first gradually increases and then gradually decreases along the direction from one of the third mounting portions to another of the third mounting portions.

[0020] According to some embodiments of the present invention, the thickness of the first reinforcing rib is 5 mm to 7.3 mm; and / or the height of the first reinforcing rib is 22 mm to 42 mm.

[0021] According to some embodiments of the present invention, the upper shell has a first direction and a second direction that are orthogonal to each other, and the first direction and the second direction are both orthogonal to the up and down directions. The upper shell of the balancing shaft also includes: a second reinforcing rib group, and the third mounting parts adjacent to each other in the first direction are connected by the second reinforcing rib group.

[0022] According to some embodiments of the present invention, the second reinforcing rib group includes a plurality of second reinforcing ribs, and the plurality of second reinforcing ribs are arranged at intervals along the second direction; wherein the upper shell is also provided with a second mounting portion for connecting to the lower shell of the balancing shaft, and there are a plurality of second mounting portions, the first mounting portion is arranged in the middle of the surface of the upper shell facing away from the balancing shaft, a plurality of second mounting portions are arranged around the annular reinforcing rib, and at least part of the second mounting portion is arranged between the plurality of second reinforcing ribs.

[0023] According to some embodiments of the present invention, the thickness of the second reinforcing rib is 5 mm to 5.6 mm; and / or the height of the second reinforcing rib is 5 mm to 7 mm.

[0024] According to some embodiments of the present invention, the second reinforcing rib group further includes: a plurality of third reinforcing ribs, the plurality of third reinforcing ribs are arranged at intervals along the first direction, and at least two adjacent second reinforcing ribs are connected by the plurality of third reinforcing ribs.

[0025] According to some embodiments of the present invention, a plurality of upper shell envelope cavities arranged at intervals are formed on the surface of the upper shell facing the balancing shaft, the upper shell envelope cavities are used to accommodate the balancing shaft, and the first mounting portion is located between two adjacent upper shell envelope cavities; wherein a portion of the annular reinforcement rib and the upper shell envelope cavity are arranged opposite to each other on both sides of the upper shell.

[0026] According to some embodiments of the present invention, the upper shell has an orthogonal first direction and a second direction, the first direction and the second direction are both orthogonal to the up and down directions, and the annular reinforcement ribs include: a first short side reinforcement rib; a second short side reinforcement rib, the second short side reinforcement rib and the first short side reinforcement rib are spaced apart in the first direction; a long side reinforcement rib, the long side reinforcement rib is respectively connected to the first short side reinforcement rib and the second short side reinforcement rib, the length of the first short side reinforcement rib and the length of the second short side reinforcement rib are both smaller than the length of the long side reinforcement rib; an inclined reinforcement rib, the inclined reinforcement rib is respectively connected to the first short side reinforcement rib and the second short side reinforcement rib, and the inclined reinforcement rib and the long side reinforcement rib are spaced apart along the second direction.

[0027] According to some embodiments of the present invention, the first short side reinforcement rib and the second short side reinforcement rib extend along the second direction; and the long side reinforcement rib extends along the first direction.

[0028] According to some embodiments of the present invention, the inclined reinforcing ribs gradually move away from the long side reinforcing ribs from both ends toward the middle.

[0029] According to some embodiments of the present invention, the upper shell is further provided with an oil return port, the oil return port is located between the first mounting portion and the inclined reinforcing rib, and the oil return port is arranged adjacent to the middle portion of the inclined reinforcing rib.

[0030] According to some embodiments of the present invention, the first mounting portion is configured as a boss having a threaded hole, and the boss at least protrudes from one side surface of the upper shell.

[0031] According to some embodiments of the present invention, the upper shell is constructed with an upper shell bearing mounting seat, and an oil port is provided on one side of the upper shell bearing mounting seat, and the oil port runs through the upper shell.

[0032] According to some embodiments of the present invention, the thickness of the annular reinforcing rib is 5 mm to 7.3 mm; and / or the height of the annular reinforcing rib is 5 mm to 26.3 mm.

[0033] According to a second aspect of the present invention, a balancing shaft housing is proposed, and the balancing shaft housing includes: a balancing shaft upper housing according to the first aspect of the present invention, the balancing shaft upper housing is used to be connected to a cylinder block of an engine; and a balancing shaft lower housing, the balancing shaft lower housing is installed on a side of the balancing shaft upper housing that is away from the cylinder block of the engine, and the balancing shaft upper housing and the balancing shaft lower housing jointly define a balancing shaft installation cavity.

[0034] The balancing shaft housing according to the second aspect of the present invention utilizes the balancing shaft upper housing according to the first aspect of the present invention, so that the structural strength of the balancing shaft upper housing is higher, and abnormal deformation of the first mounting portion can be avoided, which is beneficial to improving the connection strength between the balancing shaft upper housing and the balancing shaft lower housing, thereby improving the overall structural strength of the balancing shaft housing.

[0035] According to some embodiments of the present invention, the lower housing of the balance shaft includes: a lower shell, which is installed on the side of the upper shell facing away from the cylinder body of the engine; a third reinforcing rib group, which is arranged on the surface of the lower shell facing away from the upper shell; wherein the third reinforcing rib group includes a plurality of parallel fourth reinforcing ribs and a plurality of parallel fifth reinforcing ribs, each of the fourth reinforcing ribs is cross-connected with a plurality of the fifth reinforcing ribs, and each of the fifth reinforcing ribs is cross-connected with a plurality of the fourth reinforcing ribs.

[0036] According to some embodiments of the present invention, the lower shell is provided with a lower shell mounting portion, and the lower shell mounting portion is used to be connected only to the upper shell of the balancing shaft, and the lower shell of the balancing shaft also includes: a lower shell bearing mounting seat, the lower shell bearing mounting seat is arranged on the surface of the lower shell facing the upper shell, and the lower shell bearing mounting seat is spaced apart from the lower shell mounting portion; a sixth reinforcing rib, and the lower shell bearing mounting seat and the lower shell mounting portion are connected by the sixth reinforcing rib.

[0037] According to some embodiments of the present invention, the lower shell is configured with a locking pin mounting hole, the locking pin mounting hole passes through the lower shell, and the locking pin mounting hole is used for inserting a locking pin of the balance shaft.

[0038] According to some embodiments of the present invention, the upper shell is provided with a plurality of first positioning pin holes, and the lower shell is provided with a plurality of second positioning pin holes, and the plurality of first positioning pin holes and the plurality of second positioning pin holes correspond one to one and are positioned and matched by positioning pins.

[0039] According to some embodiments of the present invention, the upper housing of the balancing shaft and the lower housing of the balancing shaft jointly define a gear installation cavity, and the gear installation cavity is connected to the balancing shaft installation cavity. The lower housing of the balancing shaft also includes: a plurality of seventh reinforcing ribs, and the seventh reinforcing ribs are arranged on the surface of the lower shell facing away from the upper housing of the balancing shaft, and the plurality of seventh reinforcing ribs and the gear installation cavity are arranged opposite to each other on both sides of the lower shell.

[0040] According to some embodiments of the present invention, the upper housing of the balancing shaft and the lower housing of the balancing shaft jointly define a first bearing mounting hole, the first bearing mounting hole connects the balancing shaft mounting cavity and the gear mounting cavity, the hole wall of the first bearing mounting hole is provided with a thrust step, and the thrust step is used to cooperate with the axial limit of the bearing.

[0041] According to some embodiments of the present invention, the upper housing of the balancing shaft and the lower housing of the balancing shaft jointly define a second bearing mounting hole, the second bearing mounting hole is arranged on a side of the balancing shaft mounting cavity away from the gear mounting cavity and is connected to the balancing shaft mounting cavity, the hole wall of the second bearing mounting hole is provided with a limiting groove, the limiting groove is provided with a retaining ring, and the retaining ring is used to cooperate with the axial stop of the balancing shaft.

[0042] According to a third aspect of the present invention, a balancing shaft assembly is provided, the balancing shaft assembly comprising: a balancing shaft housing according to the second aspect of the present invention; and a balancing shaft, the balancing shaft being arranged in a balancing shaft mounting cavity.

[0043] According to the balancing shaft assembly of the third aspect of the present invention, by utilizing the balancing shaft housing described in the second aspect of the present invention, the structural strength of the balancing shaft upper housing is higher, abnormal deformation of the first mounting portion can be avoided, and the connection strength between the balancing shaft upper housing and the balancing shaft lower housing is improved.

[0044] According to a fourth aspect of the present invention, an engine is provided. The engine comprises a balance shaft assembly according to the third aspect of the present invention.

[0045] According to the engine of the fourth aspect embodiment of the present invention, by utilizing the balance shaft assembly described in the third aspect embodiment of the present invention, the structural strength of the balance shaft upper housing is higher, which can avoid abnormal deformation of the first mounting portion, and is beneficial to improving the connection strength between the balance shaft upper housing and the balance shaft lower housing, and the overall connection strength of the engine can be higher.

[0046] According to a fifth aspect of the present invention, a power assembly is provided, the power assembly comprising the engine according to the fourth aspect of the present invention.

[0047] The powertrain according to the fifth aspect of the present invention can avoid abnormal deformation of the first mounting portion by utilizing the engine according to the fourth aspect of the present invention, which is beneficial to improving the connection strength between the balance shaft upper housing and the balance shaft lower housing.

[0048] According to a sixth aspect of the present invention, a vehicle is provided, the vehicle comprising the engine according to the fourth aspect of the present invention or the powertrain according to the fifth aspect of the present invention.

[0049] The vehicle according to the sixth aspect of the present invention can avoid abnormal deformation of the first mounting portion by utilizing the engine according to the fourth aspect of the present invention or the powertrain according to the fifth aspect of the present invention, which is beneficial to improving the connection strength between the balance shaft upper housing and the balance shaft lower housing.

[0050] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0052] Figure 1 is a schematic structural diagram of a balance shaft housing according to an embodiment of the present invention;

[0053] Figure 2 is a schematic structural diagram of a balance shaft housing from another perspective according to an embodiment of the present invention;

[0054] Figure 3 is an exploded view of a balance shaft housing according to an embodiment of the present invention;

[0055] Figure 4 is a schematic structural diagram of an upper housing of a balancing shaft according to an embodiment of the present invention;

[0056] Figure 5 is a schematic structural diagram of another perspective of the upper housing of the balance shaft according to an embodiment of the present invention;

[0057] Figure 6 is a schematic structural diagram of a balance shaft lower housing according to an embodiment of the present invention;

[0058] Figure 7 2 is a schematic structural diagram of a balance shaft lower housing from another perspective according to an embodiment of the present invention.

[0059] Reference numerals:

[0060] 1. Balance shaft upper housing; 2. Balance shaft lower housing; 3. Balance shaft housing;

[0061] 100, upper shell; 112, first mounting portion; 113, second mounting portion; 114, third mounting portion; 120, upper shell gear mounting cavity; 130, upper shell envelope cavity; 140, upper shell bearing mounting seat; 150, oil port; 160, first positioning pin hole; 170, oil return port;

[0062] 200, annular reinforcement rib; 210, first short side reinforcement rib; 220, second short side reinforcement rib; 230, long side reinforcement rib; 240, inclined reinforcement rib;

[0063] 300, connecting ribs;

[0064] 400, first reinforcing rib group; 410, first reinforcing rib;

[0065] 500, second reinforcing rib group; 510, second reinforcing rib; 520, third reinforcing rib;

[0066] 600, lower shell; 610, lower shell mounting portion; 620, locking pin mounting hole; 630, second positioning pin hole; 640, lower shell bearing mounting seat; 650, sixth reinforcing rib; 660, seventh reinforcing rib;

[0067] 700, third reinforcing rib group; 710, fourth reinforcing rib; 720, fifth reinforcing rib;

[0068] 800, first bearing mounting hole; 810, thrust step; 900, second bearing mounting hole; 910, limit groove; 920, retaining ring; 930, closing bolt. DETAILED DESCRIPTION

[0069] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0071] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0072] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0073] The following describes a balance shaft upper housing 1 according to an embodiment of the present invention with reference to the accompanying drawings.

[0074] The balancing shaft upper housing 1 according to the embodiment of the present invention includes an upper shell 100 and an annular reinforcing rib 200 .

[0075] like Figure 1-Figure 7As shown, the upper shell 100 is provided with a first mounting portion 112 for connecting to the lower shell 2 of the balancing shaft, and the annular reinforcement rib 200 is provided on the surface of the upper shell 100 facing away from the balancing shaft. The annular reinforcement rib 200 is connected end to end to form a closed ring, and the annular reinforcement rib 200 is arranged around the first mounting portion 112.

[0076] The annular reinforcement rib 200 refers to a reinforcement rib connected end to end to form a closed ring. The shape of the annular reinforcement rib 200 is not limited. For example, the annular reinforcement rib 200 can be connected end to end to form a rectangle, circle, ellipse or other polygonal shapes such as a pentagon.

[0077] According to the embodiment of the present invention, the upper housing 1 of the balancing shaft is provided with a first mounting portion 112 on the upper shell 100, and the first mounting portion 112 is used to connect with the lower housing 2 of the balancing shaft. For example, the first mounting portion 112 can be constructed as a bolt hole, and the first mounting portion 112 can be connected to the lower housing 2 of the balancing shaft by the combination bolts 930 to achieve the connection and fixation of the upper housing 1 of the balancing shaft and the lower housing 2 of the balancing shaft.

[0078] In addition, the annular reinforcing rib 200 is arranged on the surface of the upper shell 100 facing away from the balancing shaft, so that the annular reinforcing rib 200 can greatly improve the structural strength of the upper shell 100, and the overall structural strength of the balancing shaft upper shell 1 is relatively high, which can effectively prevent the balancing shaft upper shell 1 from deforming, and at the same time, the annular reinforcing rib 200 will not interfere with the balancing shaft, that is, it will not affect the assembly between the balancing shaft upper shell 1 and the balancing shaft. Moreover, by connecting the annular reinforcing rib 200 end to end to form a closed ring, the closed ring annular reinforcing rib 200 has a higher structural strength, that is, the annular reinforcing rib 200 itself is less likely to deform, further improving the reinforcing effect of the annular reinforcing rib 200 on the structural strength of the upper shell 100, so that the structural strength of the balancing shaft upper shell 1 is higher.

[0079] In addition, the annular reinforcing ribs 200 are arranged around the first mounting portion 112, so that the annular reinforcing ribs 200 can strengthen the structure of the portion of the upper shell 100 close to the first mounting portion 112, and the reinforcement of the structural strength is more targeted, that is, the annular reinforcing ribs 200 are used to strengthen the structure of the portion of the upper shell 100 that is subjected to greater force, so that the annular reinforcing ribs 200 can fully play their role and effectively improve the structural strength of the balancing shaft upper shell 1. At the same time, it can avoid adding too many reinforcing ribs, which is beneficial to keeping the weight of the balancing shaft upper shell 1 relatively light.

[0080] As a result, the upper shell 100 is less likely to deform at a position close to the first mounting portion 112, thereby improving the structural strength of the first mounting portion 112 and making the first mounting portion 112 have a stronger force-bearing capacity. When the first mounting portion 112 and the balancing shaft lower housing 2 are connected by the coupling bolts 930, the coupling bolts 930 can be further tightened, thereby greatly improving the connection strength between the balancing shaft upper housing 1 and the balancing shaft lower housing 2 without causing deformation of the first mounting portion 112. The connection between the balancing shaft upper housing 1 and the balancing shaft lower housing 2 is more stable and reliable.

[0081] In this way, the structural strength of the balancing shaft upper housing 1 according to the embodiment of the present invention is higher, which can avoid abnormal deformation of the first mounting portion 112 and is beneficial to improving the connection strength between the balancing shaft upper housing 1 and the balancing shaft lower housing 2.

[0082] In some specific embodiments of the present invention, Figure 1 , Figure 4 and Figure 5 As shown, the upper shell 100 is provided with a second mounting portion 113 for connecting with the balance shaft lower shell 2, and the second mounting portion 113 is multiple.

[0083] Among them, the first mounting portion 112 is arranged in the middle of the surface of the upper shell 100 facing away from the balancing shaft, and multiple second mounting portions 113 are arranged around the annular reinforcement rib 200, so that the first mounting portion 112 can be close to the middle of the upper shell 100, and the multiple second mounting portions 113 can be close to the edge of the upper shell 100 and arranged along the circumference of the upper shell 100, that is, the first mounting portion 112 and the multiple second mounting portions 113 can connect different parts of the upper shell 100 with the balancing shaft lower shell 2, and the connection between the balancing shaft upper shell 1 and the balancing shaft lower shell 2 is more stable and reliable, and the distance between each second mounting portion 113 and the annular reinforcement rib 200 can be closer, and then the annular reinforcement rib 200 can also be used to improve the structural strength of the second mounting portion 113, so that the overall structural strength of the upper shell 100 is better.

[0084] In addition, it is understandable that the structural strength of the upper shell 100 near the middle is relatively low. By setting the first mounting portion 112 in the middle of the surface of the upper shell 100 that is away from the balance shaft, the annular reinforcement rib 200 can also surround the middle of the upper shell 100. The annular reinforcement rib 200 can then be used to strengthen the structure of the middle position of the upper shell 100, thereby more effectively improving the structural strength of the weaker position of the upper shell 100 and better strengthening the overall structural strength of the upper shell 100.

[0085] In some specific embodiments of the present invention, Figure 1 , Figure 4 and Figure 5As shown, the upper shell 100 is further provided with a third mounting portion 114 for connecting to the cylinder block of the engine. There are multiple third mounting portions 114 , and the multiple third mounting portions 114 are arranged around the annular reinforcing rib 200 .

[0086] With such an arrangement, when the balancing shaft housing 3 is connected and fixed to the cylinder block of the engine, it is only necessary to connect to the cylinder block of the engine through the third mounting portion 114. At this time, the balancing shaft upper housing 1 is connected to the balancing shaft lower housing 2 through the first mounting portion 112 and the second mounting portion 113 to achieve connection and fixation with the balancing shaft lower housing 2. Then, the balancing shaft housing 3 and the cylinder block can be connected to the third mounting portion 114 on the balancing shaft upper housing 1 and connected to the cylinder block of the engine to achieve connection and fixation.

[0087] In this way, the bolts only need to pass through the third mounting portion 114 to connect to the cylinder block of the engine without passing through the balancing shaft lower housing 2, that is, the bolts will only clamp the balancing shaft upper housing 1, thereby avoiding excessive clamping force between the balancing shaft upper housing 1 and the balancing shaft lower housing 2, that is, avoiding the problem of structural deformation of the balancing shaft housing 3 caused by excessive clamping force between the balancing shaft upper housing 1 and the balancing shaft lower housing 2, so that a lubricating oil film with uniform thickness can be formed between the balancing shaft upper housing 1 and the balancing shaft lower housing 2, thereby avoiding abnormal wear between the balancing shaft upper housing 1 and the balancing shaft lower housing 2.

[0088] Moreover, multiple third mounting portions 114 surround the annular reinforcing rib 200, that is, the distance between each third mounting portion 114 and the annular reinforcing rib 200 can be relatively close, and the annular reinforcing rib 200 can also be used to improve the structural strength of the third mounting portion 114, thereby improving the overall structural strength of the upper shell 100.

[0089] In some specific embodiments of the present invention, Figure 1 , Figure 4 and Figure 5 As shown, there are multiple third mounting portions 114 , and the multiple third mounting portions 114 are distributed in an array.

[0090] For example, some of the third mounting portions 114 are arranged at intervals along the first direction, and some of the third mounting portions are arranged at intervals along the second direction, wherein, as shown in the figure, the direction indicated by arrow A in the figure is the first direction, and the direction indicated by arrow B is the second direction. In this way, the balance shaft upper housing 1 can connect different parts of the upper housing 100 and the cylinder block of the engine together through multiple third mounting portions 114. For example, multiple third mounting portions 114 can be respectively adjacent to the corners or the middle of the side of the upper housing 100, thereby improving the connection stability between the balance shaft upper housing 1 and the cylinder block of the engine, with higher connection strength, and more reliable connection between the balance shaft assembly and the cylinder block of the engine.

[0091] Furthermore, by distributing the plurality of third mounting portions 114 in an array, when the balancing shaft upper housing 1 is connected to the balancing shaft lower housing 2 using the plurality of third mounting portions 114, the balancing shaft upper housing 1 will not rotate relative to the engine cylinder block, which is beneficial to improving the connection stability between the balancing shaft upper housing 1 and the engine cylinder block, and the connection between the balancing shaft housing 3 and the engine cylinder block is more stable and reliable.

[0092] In addition, it should be noted that the array distribution of multiple third mounting portions 114 can also be an oblique array distribution, for example, some of the third mounting portions 114 are arranged along the first direction, while another part of the third mounting portions 114 can be arranged along a direction inclined relative to the second direction; or, some of the third mounting portions 114 are arranged along a direction inclined relative to the first direction, while another part of the third mounting portions 114 are arranged along the second direction; or, some of the third mounting portions 114 can be arranged along a direction inclined relative to the first direction, and another part of the third mounting portions 114 are arranged along the second direction.

[0093] In addition, the third mounting portion 114 and the second mounting portion 113 can be spaced apart. For example, the third mounting portion 114 can be closer to the edge of the upper shell 100. In this way, after the second mounting portion 113 is connected to the balancing shaft lower shell 2, the balancing shaft lower shell 2 will not interfere with the third mounting portion 114 in the up and down directions. In this way, the bolts can only pass through the third mounting portion 114 and connect to the cylinder body. There will be no positional interference between the bolts and the balancing shaft lower shell 2, and assembly is more convenient.

[0094] In some specific embodiments of the present invention, Figure 5 As shown, the upper shell 100 has an upper shell gear installation cavity 120, and the upper shell gear installation cavity 120 is used to install the gear. Among them, the gear part in the gear installation cavity can be exposed from the upper shell 100 and extend into the crankcase and drive connected with the crankshaft ring gear, and the gear is drive connected with the balance shaft, so that the crankshaft ring gear can drive the balance shaft to rotate. When the engine is working, the balance shaft can be rotated to generate reverse vibration force to balance the engine and reduce engine vibration.

[0095] In addition, part of the third mounting portion 114 is disposed adjacent to the upper housing gear mounting cavity 120, and the third mounting portion 114 disposed adjacent to the upper housing gear mounting cavity 120 is configured as a bolt hole, and the bolt hole is configured with a waist-shaped hole section, and the waist-shaped hole section is used for positioning and matching with a positioning pin of the cylinder body. The positioning pin is fixedly connected to the cylinder body, and a threaded hole is provided on the positioning pin, and the waist-shaped hole section can extend along the first direction.

[0096] It can be understood that when the gear and the crankshaft gear ring are meshed, it is necessary to adjust the meshing clearance between the crankshaft gear ring and the gear along the first direction. By constructing the third mounting portion 114 adjacent to the upper housing gear mounting cavity 120 as a bolt hole, and the bolt hole is constructed with a waist-shaped hole section extending along the first direction, the locating pin on the cylinder block can be extended into the waist-shaped hole section, and the relative position of the balance shaft housing 3 and the cylinder block along the first direction can be adjusted by moving the locating pin along the waist-shaped hole section, and then the meshing clearance between the crankshaft gear ring and the gear can be adjusted. After the adjustment is completed, the bolt passes through the bolt hole and is screwed to the threaded hole on the locating pin, so that the assembly of the balance shaft assembly and the engine cylinder block can be realized, and the assembly efficiency is higher. Furthermore, the upper gear mounting cavity 120 is used to mount a gear, and the gear meshes with the gear plate on the crankshaft. The third mounting portion 114 adjacent to the upper housing gear mounting cavity 120 is constructed as a bolt hole, which can improve the positioning accuracy of the gear in the upper gear mounting cavity 120, thereby calibrating the relative position between the gear in the upper gear mounting cavity 120 and the gear plate on the crankshaft to ensure the meshing accuracy.

[0097] In some specific embodiments of the present invention, Figure 1 and Figure 4 As shown, the balancing shaft upper housing 1 further includes connecting ribs 300 .

[0098] The annular reinforcing rib 200 and at least one of the plurality of third mounting portions 114 are connected via a connecting rib 300 .

[0099] For example, each third mounting portion 114 can be connected to the annular reinforcement rib 200 via a connecting rib 300, so that each third mounting portion 114 can be connected to the annular reinforcement rib 200 as a whole, which can not only utilize the connecting rib 300 to improve the structural strength of the balancing shaft upper shell 1, but also improve the structural strength of the annular reinforcement rib 200 and the third mounting portion 114.

[0100] In addition, the third mounting portion 114 is connected via the connecting rib 300 and the annular reinforcing rib 200. The third mounting portion 114, the connecting rib 300 and the annular reinforcing rib 200 can support each other. The overall structural strength of the third mounting portion 114, the connecting rib 300 and the annular reinforcing rib 200 is higher, which further improves the structural strength of the balancing shaft upper shell 1, and the balancing shaft upper shell 1 is less likely to deform.

[0101] Furthermore, if Figure 1 and Figure 4 As shown, the height of the connecting rib 300 gradually increases in a direction away from the annular reinforcing rib 200 .

[0102] It should be noted that in order to ensure the connection stability between the balancing shaft upper shell 1 and the engine cylinder block, the dimension of the third mounting portion 114 along the up and down direction needs to be set larger, that is, the height of the third mounting portion 114 is higher, and the height of the third mounting portion 114 is higher than the height of the annular reinforcement rib 200. By gradually increasing the height of the connecting rib 300 in the direction away from the annular reinforcement rib 200, the height of a section of the connecting rib 300 close to the third mounting portion 114 can be higher, thereby increasing the connection area between the connecting rib 300 and the third mounting portion 114, and the connection strength between the connecting rib 300 and the third mounting portion 114 is higher.

[0103] Moreover, with such an arrangement, the connecting rib 300 can form a rib structure similar to a triangle, which is beneficial to improving the structural strength of the connecting rib 300 itself.

[0104] In some specific embodiments of the present invention, Figure 1 and Figure 4 As shown, the upper shell 100 has a first direction and a second direction that are orthogonal to each other, and the first direction and the second direction are both orthogonal to the up and down directions. The balancing shaft upper shell 1 also includes a first reinforcing rib group 400 .

[0105] The third mounting portions 114 adjacently arranged along the second direction are connected via the first reinforcing rib group 400 , so that the structural strength of the third mounting portions 114 adjacently arranged along the second direction can be improved via the first reinforcing rib group 400 , thereby improving the overall structural strength of the balancing shaft upper housing 1 .

[0106] Furthermore, the first reinforcing rib group 400 includes a plurality of first reinforcing ribs 410, a cavity is formed between the plurality of first reinforcing ribs 410, and at least a portion of the second mounting portion 113 is disposed in the cavity. In this way, the first reinforcing rib group 400 can improve the structural strength of the upper shell 100 at the portion of the second mounting portion 113, thereby improving the structural strength of the second mounting portion 113, preventing the second mounting portion 113 from deforming, and making the connection strength between the second mounting portion 113 and the balance shaft lower housing 2 higher.

[0107] In addition, the distance between the two side walls of the cavity opposite to each other in the first direction gradually increases from one third mounting portion 114 to another third mounting portion 114, or the distance between the two side walls of the cavity opposite to each other in the first direction first gradually increases and then gradually decreases from one third mounting portion 114 to another third mounting portion 114.

[0108] The distance between two opposite side walls of the cavity in the first direction refers to the distance between two side walls of the cavity spaced apart in the first direction.

[0109] That is to say, the cavities between the multiple first reinforcing ribs 410 can form a triangular structure, that is, the multiple first reinforcing ribs 410 are constructed into a triangular structure, and the first reinforcing rib group 400 itself has a higher structural strength. After the adjacent third mounting parts 114 are connected by the first reinforcing rib group 400, the connection strength of the adjacent third mounting parts 114 can be greatly improved, thereby improving the connection strength of the balancing shaft upper shell 1.

[0110] In some specific embodiments of the present invention, the thickness of the first reinforcing rib 410 is 5 mm to 7.3 mm. In this way, on the one hand, the thickness of the first reinforcing rib 410 can be avoided from being too thin, so as to ensure that the structural strength of the first reinforcing rib 410 can be high. On the other hand, the thickness of the first reinforcing rib 410 can be avoided from being too thick, and the first reinforcing rib 410 will not occupy too much space, which is convenient for layout.

[0111] In some specific embodiments of the present invention, the height of the first reinforcing rib 410 is 22 mm to 42 mm. It can be understood that if the height of the first reinforcing rib 410 is too low or too high, it will affect the structural strength of the first reinforcing rib 410. This arrangement can keep the height of the first reinforcing rib 410 within a suitable range, and the structural strength of the first reinforcing rib 410 can be higher. At the same time, it can avoid the height of the first reinforcing rib 410 being too high, which will lead to an excessively large volume of the balancing shaft upper shell 1, and facilitate layout.

[0112] In some specific embodiments of the present invention, Figure 1 and Figure 4 As shown, the balancing shaft upper housing 1 further includes a second reinforcing rib group 500 .

[0113] The third mounting portions 114 adjacent to each other in the first direction are connected by the second reinforcing rib group 500. In this way, the second reinforcing rib group 500 can connect the third mounting portions 114 adjacent to each other in the first direction together, so that the structural integrity of the balancing shaft upper shell 1 is higher, and the third mounting portions 114 are not easily deformed, thereby further improving the overall structural strength of the balancing shaft upper shell 1.

[0114] In addition, the second reinforcing rib group 500 includes a plurality of second reinforcing ribs 510, and the plurality of second reinforcing ribs 510 are arranged at intervals along the second direction, and at least a portion of the second mounting portion 113 is arranged between the plurality of second reinforcing ribs 510. In this way, the second reinforcing rib group 500 can improve the structural strength of the upper shell 100 at the portion of the second mounting portion 113, thereby improving the structural strength of the second mounting portion 113 and avoiding deformation of the second mounting portion 113, so that the connection strength between the second mounting portion 113 and the lower housing 2 of the balance shaft can be higher.

[0115] Therefore, the third mounting parts 114 adjacent to each other along the second direction are connected by the first reinforcing rib group 400, and the third mounting parts 114 adjacent to each other along the first direction are connected by the second reinforcing rib group 500, that is, the adjacent third mounting parts 114 can be connected by multiple reinforcing ribs to form an overall force-bearing frame of the outer ring of the balancing shaft upper shell 1, which is beneficial to improving the overall structural strength of the balancing shaft upper shell 1.

[0116] In some specific embodiments of the present invention, the thickness of the second reinforcing rib 510 is 5 mm to 5.6 mm. In this way, on the one hand, the thickness of the second reinforcing rib 510 can be avoided from being too thin, so as to ensure that the structural strength of the second reinforcing rib 510 can be high. On the other hand, the thickness of the second reinforcing rib 510 can be avoided from being too thick, and the second reinforcing rib 510 will not occupy too much space, which is convenient for layout.

[0117] In some specific embodiments of the present invention, the height of the second reinforcing rib 510 is 5 mm to 7 mm. It is understandable that if the height of the second reinforcing rib 510 is too low or too high, the structural strength of the second reinforcing rib 510 will be affected. This arrangement can keep the height of the second reinforcing rib 510 within a suitable range, and the structural strength of the second reinforcing rib 510 can be relatively high. At the same time, it can avoid the second reinforcing rib 510 being too high, which will lead to an excessively large volume of the housing 1 on the balance shaft, and facilitates layout.

[0118] In some specific embodiments of the present invention, Figure 1 and Figure 4 As shown, the second reinforcing rib group 500 further includes a plurality of third reinforcing ribs 520 , which are arranged at intervals along the first direction, and at least two adjacent second reinforcing ribs 510 are connected by the plurality of third reinforcing ribs 520 .

[0119] It can be understood that the extension dimension of the second reinforcing rib 510 along the first direction is relatively large. By providing a plurality of third reinforcing ribs 520, the plurality of third reinforcing ribs 520 can connect multiple parts of two adjacent second reinforcing ribs 510 together, thereby further improving the structural strength of the second reinforcing rib 510. The overall structural strength of the second reinforcing rib group 500 is higher, thereby further improving the structural strength of the balancing shaft upper shell 1.

[0120] In some specific embodiments of the present invention, Figure 4 and Figure 5As shown, a plurality of upper shell envelope cavities 130 are formed on the surface of the upper shell 100 facing the balance shaft, and the upper shell envelope cavities 130 are used to accommodate the balance shaft, and the first mounting portion 112 is located between two adjacent upper shell envelope cavities 130; wherein, a portion of the annular reinforcement rib 200 and the upper shell envelope cavities 130 are arranged opposite to each other on both sides of the upper shell 100. Specifically, the upper shell envelope cavities 130 are located on the side of the upper shell 100 facing the balance shaft, and the annular reinforcement rib 200 is located on the side of the upper shell 100 facing away from the balance shaft, and a portion of the annular reinforcement rib 200 and the upper shell envelope cavities 130 are arranged opposite to each other.

[0121] It can be understood that the upper shell envelope cavity 130 needs to be arched in the direction away from the balancing shaft to form a space for accommodating the balancing shaft. By situating the first mounting portion 112 between two adjacent upper shell envelope cavities 130, the distance between the first mounting portion 112 and the balancing shaft lower shell 2 can be closer, so that the first mounting portion 112 and the balancing shaft lower shell 2 can be stopped, and then it is convenient to tighten the first mounting portion 112 and the balancing shaft lower shell 2 together through the closing bolt 930 to achieve the connection and fixation between the balancing shaft upper shell 1 and the balancing shaft lower shell 2. Moreover, after the first mounting portion 112 and the balancing shaft lower shell 2 are stopped, they are tightened through the closing bolt 930, so that the balancing shaft lower shell 2 and the first mounting portion 112 are not easy to deform, and the connection is more stable.

[0122] In addition, by arranging a portion of the annular reinforcement rib 200 and the upper shell envelope cavity 130 relatively on both sides of the upper shell 100, the annular reinforcement rib 200 can be used to strengthen the structure of the upper shell 100 close to the upper shell envelope cavity 130, so as to improve the structural strength of the upper shell 100 at the upper shell envelope cavity 130, and the structural strength of the balancing shaft upper shell 1 can be higher.

[0123] In some specific embodiments of the present invention, Figure 1 and Figure 4 As shown, the upper shell 100 has a first direction and a second direction that are orthogonal to each other, and the first direction and the second direction are both orthogonal to the up and down directions. The annular reinforcement rib 200 includes a first short side reinforcement rib 210 , a second short side reinforcement rib 220 , a long side reinforcement rib 230 and an inclined reinforcement rib 240 .

[0124] The second short side reinforcement rib 220 and the first short side reinforcement rib 210 are spaced apart in the first direction, the long side reinforcement rib 230 are respectively connected to the first short side reinforcement rib 210 and the second short side reinforcement rib 220, the length of the first short side reinforcement rib 210 and the length of the second short side reinforcement rib 220 are both smaller than the length of the long side reinforcement rib 230, the inclined reinforcement rib 240 is respectively connected to the first short side reinforcement rib 210 and the second short side reinforcement rib 220, and the inclined reinforcement rib 240 and the long side reinforcement rib 230 are spaced apart along the second direction.

[0125] That is to say, the first short side reinforcement rib 210, the second short side reinforcement rib 220, the long side reinforcement rib 230 and the inclined reinforcement rib 240 can form a pentagonal structure. Different reinforcement ribs in the annular reinforcement rib 200 can support adjacent reinforcement ribs in different directions. The overall stability of the annular reinforcement rib 200 is higher, which can improve the overall structural strength of the annular reinforcement rib 200, which is beneficial to improve the overall structural strength and rigidity of the upper shell 100, so that the vibration resistance of the balance shaft upper shell 1 is better.

[0126] Furthermore, if Figure 1 and Figure 4 As shown, the first short side reinforcing rib 210 and the second short side reinforcing rib 220 extend along the second direction; the long side reinforcing rib 230 extends along the first direction. In this way, the first short side reinforcing rib 210 and the second short side reinforcing rib 220 can be perpendicular to the long side reinforcing rib 230 respectively, and the first short side reinforcing rib 210 and the second short side reinforcing rib 220 can extend in the same direction, so that the annular reinforcing rib 200 is connected end to end.

[0127] Moreover, it can be understood that the adjacent upper shell envelope cavities 130 are arranged along the first direction. In order to utilize the annular reinforcement ribs 200 to improve the structural strength of multiple upper shell envelope cavities 130, the two ends of the long side reinforcement ribs 230 need to extend to the two adjacent upper shell envelope cavities 130 respectively. Therefore, by extending the long side reinforcement ribs 230 along the first direction, it is convenient to connect the long side reinforcement ribs 230 to the two adjacent upper shell envelope cavities 130 respectively, so as to effectively improve the structural strength of the upper shell 100 at the upper shell envelope cavity 130.

[0128] In some specific embodiments of the present invention, Figure 1 and Figure 4 As shown, the inclined reinforcement ribs 240 gradually move away from the long side reinforcement ribs 230 from both ends to the middle. In this way, the annular reinforcement ribs 200 can form a pentagonal structure, which is conducive to improving the structural strength of the annular reinforcement ribs 200, and the annular reinforcement ribs 200 have a better reinforcing effect on the structural strength of the upper shell 100. Moreover, the middle part of the inclined reinforcement ribs 240 can extend in a direction away from the first mounting portion 112, thereby increasing the space surrounded by the annular reinforcement ribs 200, making it easier for the annular reinforcement ribs 200 to surround the first mounting portion 112, and at the same time, avoiding position interference between the inclined reinforcement ribs 240 and the first mounting portion 112, which is convenient for layout.

[0129] In some specific embodiments of the present invention, Figure 4 As shown, the upper shell 100 is further provided with an oil return port 170 , which is located between the first mounting portion 112 and the inclined reinforcing rib 240 , and the oil return port 170 is disposed adjacent to the middle portion of the inclined reinforcing rib 240 .

[0130] By providing the oil return port 170 , the return oil in the crankcase can be used to fully lubricate the balance shaft installed thereon, thereby avoiding abnormal wear of the balance shaft caused by lack of oil.

[0131] In addition, it can be understood that the inclined reinforcement rib 240 gradually moves away from the long side reinforcement rib 230 from both ends to the middle, that is, the distance between the middle part of the inclined reinforcement rib 240 and the long side reinforcement rib 230 is larger, that is, the distance between the middle part of the inclined reinforcement rib 240 and the first mounting portion 112 is larger. By arranging the oil return port 170 adjacent to the middle part of the inclined reinforcement rib 240, the inclined reinforcement rib 240 can avoid the oil return port 170, avoiding the position interference between the inclined reinforcement rib 240 and the oil return port 170, and facilitating the layout.

[0132] In some specific embodiments of the present invention, Figure 4 and Figure 5 As shown, the first mounting portion 112 is configured as a boss having a threaded hole, and the boss at least protrudes from one side surface of the upper shell 100 .

[0133] For example, the first mounting portion 112 may protrude from the side of the upper shell 100 facing the balance shaft; or, the first mounting portion 112 may protrude from the side of the upper shell 100 facing away from the balance shaft; or still further, the first mounting portion 112 may protrude from the side of the upper shell 100 facing the balance shaft and from the side of the upper shell 100 facing away from the balance shaft.

[0134] In this way, one end of the first mounting portion 112 can protrude from the side of the upper shell 100 that is away from the balancing shaft, and the end can be connected to the side of the upper shell 100 that is away from the balancing shaft through a reinforcing rib to improve the structural strength of the first mounting portion 112, and the other end of the first mounting portion 112 protrudes from the side of the upper shell 100 that is toward the balancing shaft, so that the first mounting portion 112 can be stopped against the balancing shaft lower shell 2 to fix the distance between the first mounting portion 112 and the balancing shaft lower shell 2, and when the first mounting portion 112 and the balancing shaft lower shell 2 are tightened by the closing bolt 930, the balancing shaft shell 3 is not easy to deform, and the connection is more reliable.

[0135] Moreover, such a configuration can increase the size of the first mounting portion 112, that is, the size of the first mounting portion 112 along the thickness direction of the balancing shaft upper shell 1 can be larger, thereby increasing the height of the boss, so as to facilitate the construction of a deeper threaded hole, which is beneficial to improving the connection strength between the assembly bolt 930 and the first mounting portion 112, thereby improving the connection strength between the balancing shaft upper shell 1 and the balancing shaft lower shell 2.

[0136] In some specific embodiments of the present invention, Figure 4 and Figure 5As shown, the upper shell 100 is configured with an upper shell bearing mounting seat 140 , and an oil through port 150 is provided on one side of the upper shell bearing mounting seat 140 , and the oil through port 150 passes through the upper shell 100 .

[0137] It should be noted that there can be multiple upper shell bearing mounting seats 140, and an oil port 150 can be set on the side of each upper shell bearing mounting seat 140 facing the upper shell envelope cavity 130, so that the return oil in the crankcase can be used to fully lubricate the bearings installed on the upper shell bearing mounting seats 140, thereby avoiding abnormal wear caused by lack of oil in the bearings.

[0138] In addition, the oil port 150 can also discharge oil to the outside to discharge excess oil in the upper shell envelope cavity 130 to avoid excessive oil stirring that causes excessive rotational resistance of the balance shaft, thereby reducing engine power loss.

[0139] In some specific embodiments of the present invention, the thickness of the annular reinforcement 200 is 5 mm to 7.3 mm. In this way, on the one hand, the thickness of the annular reinforcement 200 can be avoided from being too thin, so as to ensure that the structural strength of the annular reinforcement 200 can be high. On the other hand, the thickness of the annular reinforcement 200 can be avoided from being too thick, so as to avoid the annular reinforcement 200 occupying too large a space, thereby facilitating the layout.

[0140] In some specific embodiments of the present invention, the height of the annular reinforcement rib 200 is 5 mm to 26.3 mm. It can be understood that if the height of the annular reinforcement rib 200 is too low or too high, it will affect the structural strength of the annular reinforcement rib 200. Such a setting can keep the height of the annular reinforcement rib 200 within a suitable range, and the structural strength of the annular reinforcement rib 200 can be higher. At the same time, it can avoid the height of the annular reinforcement rib 200 being too high, which will lead to an excessively large volume of the balancing shaft upper shell 1, and facilitate layout.

[0141] According to the balancing shaft housing 3 of the embodiment of the present invention, by utilizing the balancing shaft upper housing 1 according to the above-mentioned embodiment of the present invention, the structural strength of the balancing shaft upper housing 1 is higher, which can avoid abnormal deformation of the first mounting portion 112, and is beneficial to improving the connection strength between the balancing shaft upper housing 1 and the balancing shaft lower housing 2, thereby improving the overall structural strength of the balancing shaft housing 3.

[0142] In some specific embodiments of the present invention, Figure 6 and Figure 7 As shown, the balance shaft lower housing 2 includes a lower shell 600 and a third reinforcing rib group 700 .

[0143] The lower shell 600 is mounted on the side of the upper shell 100 facing away from the cylinder block of the engine, and the third reinforcing rib group 700 is arranged on the surface of the lower shell 600 facing away from the upper shell 100. The third reinforcing rib group 700 includes a plurality of fourth reinforcing ribs 710 arranged in parallel and a plurality of fifth reinforcing ribs 720 arranged in parallel, each of the fourth reinforcing ribs 710 is cross-connected with a plurality of fifth reinforcing ribs 720, and each of the fifth reinforcing ribs 720 is cross-connected with a plurality of fourth reinforcing ribs 710.

[0144] For example, the fourth reinforcing rib 710 may extend along the first direction, and a plurality of fourth reinforcing ribs 710 may be arranged at intervals along the second direction, and the fifth reinforcing rib 720 may extend along the second direction, and a plurality of first reinforcing ribs 410 may be arranged at intervals along the first direction. The fourth reinforcing rib 710 and the fifth reinforcing rib 720 may cross each other, so that the fourth reinforcing rib 710 and the fifth reinforcing rib 720 may support each other, further improving the structural strength of the balance shaft lower housing 2, and the plurality of fourth reinforcing ribs 710 and the plurality of fifth reinforcing ribs 720 may cover the lower housing 600, so as to have a better reinforcing effect on the structural strength of the balance shaft lower housing 2.

[0145] In some specific embodiments of the present invention, Figure 6 and Figure 7 As shown, the lower shell 600 is provided with a lower shell mounting portion 610, and the lower shell mounting portion 610 is used to be connected only to the balancing shaft upper shell 1, and the balancing shaft lower shell 2 also includes a lower shell bearing mounting seat 640 and a sixth reinforcing rib 650. The lower shell bearing mounting seat 640 is arranged on the surface of the lower shell 600 facing the upper shell 100, and the lower shell bearing mounting seat 640 is spaced apart from the lower shell mounting portion 610, and the lower shell bearing mounting seat 640 and the lower shell mounting portion 610 are connected through the sixth reinforcing rib 650.

[0146] The upper shell bearing mounting seat 140 and the lower shell bearing mounting seat 640 may jointly define a bearing mounting hole.

[0147] By utilizing the sixth reinforcing rib 650 to connect the lower shell bearing mounting seat 640 and the lower shell mounting portion 610, the lower shell bearing mounting seat 640, the lower shell mounting portion 610 and the sixth reinforcing rib 650 can be connected as one, thereby further improving the structural strength of the lower shell bearing mounting seat 640 and the lower shell mounting portion 610, and the structural strength of the balance shaft lower shell 2 is higher.

[0148] In addition, the lower shell mounting portion 610 can be arranged between adjacent fourth reinforcing ribs 710, and the lower shell mounting portion 610 can be arranged between adjacent fifth reinforcing ribs 720, that is, the lower shell mounting portion 610 is located between the cross-arranged fourth reinforcing ribs 710 and the fifth reinforcing ribs 720, so that the structure of the lower shell mounting portion 610 can be strengthened by using the third reinforcing rib group 700 to make the connection strength between the balance shaft lower shell 2 and the balance shaft upper shell 1 higher.

[0149] In some specific embodiments of the present invention, Figure 6 and Figure 7 As shown, the lower shell 600 is configured with a locking pin installation hole 620 , which passes through the lower shell 600 , and is used for inserting a locking pin of the balance shaft.

[0150] It should be noted that when assembling the balance shaft assembly and the cylinder block of the engine, since the gear in the balance shaft assembly needs to be meshed with the crankshaft gear ring, the gear in the balance shaft assembly needs to be fixed and not rotated first to facilitate assembly. By setting the locking pin installation hole 620, the locking pin can be inserted into the locking pin installation hole 620, and then the locking pin is used to lock the balance shaft, so that the balance shaft remains stationary, and the gear in the balance shaft assembly can also remain stationary, so that the gear in the balance shaft assembly and the crankshaft gear ring can be meshed, and the assembly is more convenient. After the assembly is completed, the locking pin is pulled out, and the gear and the balance shaft can be driven to rotate through the crankshaft gear ring.

[0151] Therefore, when assembling the balance shaft assembly, there is no need to use additional tooling to position the balance shaft phase, and the locking pin can be pulled out after the assembly is completed. The positioning method is simpler and the assembly efficiency is high.

[0152] In some specific embodiments of the present invention, Figure 7 As shown, the upper shell 100 is provided with a plurality of first positioning pin holes 160 , and the lower shell 600 is provided with a plurality of second positioning pin holes 630 . The plurality of first positioning pin holes 160 and the plurality of second positioning pin holes 630 correspond to each other one by one and are positioned and matched by positioning pins.

[0153] With such an arrangement, when assembling the balancing shaft upper shell 1 and the balancing shaft lower shell 2, the first locating pin hole 160 and the second locating pin hole 630 can be first positioned by the locating pins to position the balancing shaft upper shell 1 and the balancing shaft lower shell 2, and then the balancing shaft upper shell 1 and the balancing shaft lower shell 2 are connected and fixed by the closing bolts 930, which is helpful to simplify the assembly steps of the balancing shaft upper shell 1 and the balancing shaft lower shell 2 and improve the assembly efficiency.

[0154] In some specific embodiments of the present invention, Figure 6 As shown, the balancing shaft upper shell 1 and the balancing shaft lower shell 2 jointly define a gear installation cavity, and the gear installation cavity is connected to the balancing shaft installation cavity. Thus, the balancing shaft can be installed in the balancing shaft installation cavity, the gear can be installed in the gear installation cavity, and one end of the balancing shaft can extend into the gear installation cavity to connect the gear and the balancing shaft for transmission.

[0155] In addition, the balance shaft lower housing 2 further includes a plurality of seventh reinforcing ribs 660, which are disposed on the surface of the lower housing 600 facing away from the balance shaft upper housing 1, and the plurality of seventh reinforcing ribs 660 and the gear installation cavity are disposed oppositely on both sides of the lower housing 600. Specifically, the gear installation cavity is located on the side of the lower housing 600 facing the balance shaft, the plurality of seventh reinforcing ribs 660 are located on the side of the lower housing 600 facing away from the balance shaft, and the plurality of seventh reinforcing ribs 660 and the gear installation cavity are disposed oppositely.

[0156] In this way, the seventh reinforcing rib 660 can be used to strengthen the structure of the lower shell 600 close to the gear mounting cavity, further improving the structural strength of the balancing shaft lower shell 2 at the gear mounting cavity, and more reinforcing ribs are arranged on the balancing shaft lower shell 2, further improving the structural strength of the balancing shaft lower shell 2, and the balancing shaft lower shell 2 has better rigidity and better vibration resistance.

[0157] In some specific embodiments of the present invention, Figure 7 As shown, the balancing shaft upper shell 1 and the balancing shaft lower shell 2 jointly define a first bearing mounting hole 800, and the first bearing mounting hole 800 connects the balancing shaft mounting cavity and the gear mounting cavity. The hole wall of the first bearing mounting hole 800 is provided with a thrust step 810, and the thrust step 810 is used to cooperate with the axial limit of the bearing.

[0158] That is to say, the first bearing mounting hole 800 is arranged at the end of the balance shaft mounting cavity facing the gear mounting cavity, and the bearing at one end of the balance shaft is installed in the first bearing mounting hole 800. The thrust step 810 of the first bearing mounting hole 800 can stop the bearing, and then limit the end of the balance shaft facing the gear mounting cavity.

[0159] In some specific embodiments of the present invention, Figure 1 and Figure 7 As shown, the balancing shaft upper shell 1 and the balancing shaft lower shell 2 jointly define a second bearing mounting hole 900. The second bearing mounting hole 900 is arranged on a side of the balancing shaft mounting cavity away from the gear mounting cavity and is connected to the balancing shaft mounting cavity. A limiting groove 910 is provided on the hole wall of the second bearing mounting hole 900. The limiting groove 910 is provided with a retaining ring 920. The retaining ring 920 is used to cooperate with the axial stop of the balancing shaft.

[0160] By setting a limit groove 910 on the hole wall of the second bearing mounting hole 900 and installing a retaining ring 920 into the limit groove 910, the bearing at the end of the balance shaft away from the gear mounting cavity can be stopped, thereby stopping the end of the balance shaft away from the gear mounting cavity. In addition, compared with setting a thrust step 810, the structure of setting the limit groove 910 and the retaining ring 920 has lower processing requirements, is easy to process, and is convenient and quick to assemble.

[0161] The following describes a balancing shaft assembly according to an embodiment of the present invention with reference to the accompanying drawings. The balancing shaft assembly includes a balancing shaft housing 3 and a balancing shaft according to the above embodiment of the present invention. The balancing shaft is arranged in a balancing shaft installation cavity. An eccentric block is provided on the balancing shaft. When the balancing shaft rotates, the reverse vibration force generated by the eccentric block can be used to balance the engine to reduce engine vibration.

[0162] According to the balancing shaft assembly of the embodiment of the present invention, by utilizing the balancing shaft housing 3 according to the above-mentioned embodiment of the present invention, the structural strength of the balancing shaft upper housing 1 is higher, which can avoid abnormal deformation of the first mounting portion 112, and is beneficial to improving the connection strength between the balancing shaft upper housing 1 and the balancing shaft lower housing 2.

[0163] The following describes an engine according to an embodiment of the present invention with reference to the accompanying drawings, wherein the engine includes a balancing shaft assembly according to the above embodiment of the present invention, wherein the balancing shaft assembly can be connected to the cylinder block of the engine by bolts.

[0164] It should be noted that when the engine is working, the piston inside the engine makes repeated high-speed linear motion in the cylinder, generating a large inertial force on the piston, piston pin and connecting rod. When the inertial force cannot be balanced, the engine will cause vibration. The balance shaft can be connected to the crankshaft through gears, and can then rotate synchronously with the crankshaft. The reverse vibration force generated by the eccentric block on the balance shaft can be used to achieve a good balancing effect for the engine and reduce engine vibration.

[0165] According to the engine of the embodiment of the present invention, by utilizing the balance shaft assembly according to the above-mentioned embodiment of the present invention, the structural strength of the balance shaft upper shell 1 is higher, which can avoid abnormal deformation of the first mounting portion 112, and is beneficial to improving the connection strength between the balance shaft upper shell 1 and the balance shaft lower shell 2, and the overall connection strength of the engine can be higher.

[0166] A powertrain according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The powertrain includes the engine according to the above embodiment of the present invention.

[0167] According to the powertrain of the embodiment of the present invention, by utilizing the engine described in the above embodiment of the present invention, it is possible to avoid abnormal deformation of the first mounting portion of the balance shaft upper housing 1, which is beneficial to improving the connection strength between the balance shaft upper housing 1 and the balance shaft lower housing 2.

[0168] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes an engine according to the above embodiment of the present invention or a powertrain according to the above embodiment of the present invention.

[0169] According to the vehicle of the embodiment of the present invention, by utilizing the engine according to the above embodiment of the present invention or the powertrain according to the above embodiment of the present invention, it is possible to avoid abnormal deformation of the first mounting portion 112, which is beneficial to improving the connection strength between the balance shaft upper housing 1 and the balance shaft lower housing 2.

[0170] The housing 1, housing 3 and assembly of the balancing shaft according to the embodiment of the present invention as well as other structures and operations of the engine, powertrain and vehicle are well known to those skilled in the art and will not be described in detail here.

[0171] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0172] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A balance shaft upper housing, characterized in that: include: An upper shell, wherein the upper shell is provided with a first mounting portion for connecting with a lower housing of a balancing shaft; An annular reinforcing rib is provided on a surface of the upper shell that faces away from the balancing shaft, the annular reinforcing rib is connected end to end to form a closed ring, and the annular reinforcing rib is provided around the first mounting portion.

2. The balance shaft upper housing according to claim 1, characterized in that: The upper shell is also provided with a second mounting portion for connecting with the lower shell of the balance shaft, and the second mounting portion is multiple; Wherein, the first mounting portion is arranged at the middle portion of the surface of the upper shell facing away from the balancing shaft, and a plurality of the second mounting portions are arranged around the annular reinforcing rib.

3. The balance shaft upper housing according to claim 1, characterized in that: The upper shell is also provided with a third mounting portion for connecting with the cylinder body of the engine, and there are a plurality of the third mounting portions, and the plurality of the third mounting portions are arranged around the annular reinforcing rib.

4. The balance shaft upper housing according to claim 3, characterized in that: There are multiple third mounting parts, and the multiple third mounting parts are distributed in an array.

5. The balance shaft upper housing according to claim 3, characterized in that: The upper shell has an upper shell gear installation cavity, and the upper shell gear installation cavity is used to install the gear; Part of the third mounting portion is arranged adjacent to the upper housing gear mounting cavity, and the third mounting portion arranged adjacent to the upper housing gear mounting cavity is configured as a bolt hole, wherein the bolt hole is configured with a waist-shaped hole section, and the waist-shaped hole section is used for positioning and cooperating with the locating pin of the cylinder body.

6. The balance shaft upper housing according to claim 3, characterized in that: Also includes: A connecting rib, wherein the annular reinforcing rib and at least one of the plurality of third mounting portions are connected via the connecting rib.

7. The balance shaft upper housing according to claim 6, characterized in that: The height of the connecting rib gradually increases in a direction away from the annular reinforcing rib.

8. The balance shaft upper housing according to claim 3, characterized in that: The upper shell has a first direction and a second direction that are orthogonal to each other, and the first direction and the second direction are both orthogonal to the up-down direction. The upper shell of the balancing shaft further includes: A first reinforcing rib group, wherein the third mounting portions adjacently arranged along the second direction are connected by the first reinforcing rib group.

9. The balance shaft upper housing according to claim 8, characterized in that: The first reinforcing rib group includes a plurality of first reinforcing ribs, and a cavity is formed between the plurality of first reinforcing ribs; In which, the upper shell is also provided with a second mounting portion for connecting to the lower shell of the balancing shaft, and there are multiple second mounting portions. The first mounting portion is arranged in the middle of the surface of the upper shell facing away from the balancing shaft, and multiple second mounting portions are arranged around the annular reinforcement rib, and at least part of the second mounting portions are arranged in the cavity.

10. The balance shaft upper housing according to claim 9, characterized in that: The distance between two side walls of the cavity opposite to each other in the first direction gradually increases from one third mounting portion to another third mounting portion; or The distance between two side walls of the cavity that are opposite to each other in the first direction first gradually increases and then gradually decreases along the direction from one third mounting portion to the other third mounting portion.

11. The balance shaft upper housing according to claim 9, characterized in that: The thickness of the first reinforcing rib is 5 mm to 7.3 mm; and / or The height of the first reinforcing rib is 22 mm to 42 mm.

12. The balance shaft upper housing according to claim 3, characterized in that: The upper shell has a first direction and a second direction that are orthogonal to each other, the first direction and the second direction are both orthogonal to the up and down direction, and the balance shaft upper shell further includes: A second reinforcing rib group, wherein the third mounting portions adjacent to each other in the first direction are connected by the second reinforcing rib group.

13. The balance shaft upper housing according to claim 12, characterized in that: The second reinforcing rib group includes a plurality of second reinforcing ribs, and the plurality of second reinforcing ribs are arranged at intervals along the second direction; In which, the upper shell is also provided with a second mounting portion for connecting to the lower shell of the balancing shaft, and there are multiple second mounting portions. The first mounting portion is arranged in the middle of the surface of the upper shell facing away from the balancing shaft, and multiple second mounting portions are arranged around the annular reinforcement rib, and at least part of the second mounting portions are arranged between the multiple second reinforcement ribs.

14. The balance shaft upper housing according to claim 13, characterized in that: The thickness of the second reinforcing rib is 5 mm to 5.6 mm; and / or The height of the second reinforcing rib is 5 mm to 7 mm.

15. The balance shaft upper housing according to claim 13, characterized in that: The second reinforcement rib group also includes: A plurality of third reinforcing ribs are arranged at intervals along the first direction, and at least two adjacent second reinforcing ribs are connected by the plurality of third reinforcing ribs.

16. The balance shaft upper housing according to claim 1, characterized in that: A plurality of upper shell envelope cavities are formed on the surface of the upper shell facing the balancing shaft and arranged at intervals, the upper shell envelope cavities are used to accommodate the balancing shaft, and the first mounting portion is located between two adjacent upper shell envelope cavities; Wherein, a part of the annular reinforcement rib and the upper shell envelope cavity are arranged opposite to each other on two sides of the upper shell.

17. The balance shaft upper housing according to claim 1, characterized in that: The upper shell has a first direction and a second direction that are orthogonal to each other, the first direction and the second direction are both orthogonal to the up and down directions, and the annular reinforcement rib comprises: First short side reinforcement; a second short side reinforcing rib, wherein the second short side reinforcing rib and the first short side reinforcing rib are spaced apart from each other in the first direction; Long side reinforcing ribs, wherein the long side reinforcing ribs are respectively connected to the first short side reinforcing ribs and the second short side reinforcing ribs, and the lengths of the first short side reinforcing ribs and the second short side reinforcing ribs are both shorter than the length of the long side reinforcing ribs; Inclined reinforcing ribs, wherein the inclined reinforcing ribs are respectively connected to the first short side reinforcing ribs and the second short side reinforcing ribs, and the inclined reinforcing ribs and the long side reinforcing ribs are spaced apart along the second direction.

18. The balance shaft upper housing according to claim 17, characterized in that: The first short side reinforcing rib and the second short side reinforcing rib extend along the second direction; The long side reinforcement ribs extend along the first direction.

19. The balance shaft upper housing according to claim 17, characterized in that: The inclined reinforcing ribs gradually move away from the long side reinforcing ribs from both ends to the middle.

20. The balance shaft upper housing according to claim 19, characterized in that: The upper shell is also provided with an oil return port, which is located between the first mounting portion and the inclined reinforcing rib, and the oil return port is arranged adjacent to the middle portion of the inclined reinforcing rib.

21. The balance shaft upper housing according to claim 1, characterized in that: The first mounting portion is configured as a boss having a threaded hole, and the boss at least protrudes from one side surface of the upper shell.

22. The balance shaft upper housing according to claim 1, characterized in that: The upper shell is structured with an upper shell bearing mounting seat, and an oil through port is arranged on one side of the upper shell bearing mounting seat, and the oil through port passes through the upper shell.

23. The balance shaft upper housing according to claim 1, characterized in that: The thickness of the annular reinforcement rib is 5 mm to 7.3 mm; and / or The height of the annular reinforcement rib is 5 mm to 26.3 mm.

24. A balance shaft housing, characterized in that: include: The balance shaft upper housing according to any one of claims 1 to 23, wherein the balance shaft upper housing is used to be connected to a cylinder block of an engine; The balancing shaft lower housing is installed on a side of the balancing shaft upper housing that faces away from the cylinder body of the engine. The balancing shaft upper housing and the balancing shaft lower housing jointly define a balancing shaft installation cavity.

25. The balance shaft housing according to claim 24, characterized in that The balance shaft lower housing comprises: A lower shell, the lower shell being mounted on a side of the upper shell facing away from the cylinder body of the engine; a third reinforcing rib group, the third reinforcing rib group being arranged on a surface of the lower shell facing away from the upper shell; Among them, the third reinforcing rib group includes a plurality of fourth reinforcing ribs arranged in parallel and a plurality of fifth reinforcing ribs arranged in parallel, each of the fourth reinforcing ribs is cross-connected with a plurality of the fifth reinforcing ribs, and each of the fifth reinforcing ribs is cross-connected with a plurality of the fourth reinforcing ribs.

26. The balance shaft housing according to claim 25, characterized in that The lower shell is provided with a lower shell mounting portion, and the lower shell mounting portion is used to be connected only to the upper shell of the balancing shaft, and the lower shell of the balancing shaft further includes: A lower shell bearing mounting seat, the lower shell bearing mounting seat is arranged on the surface of the lower shell facing the upper shell, and the lower shell bearing mounting seat is spaced apart from the lower shell mounting portion; A sixth reinforcing rib, the lower shell bearing mounting seat and the lower shell mounting portion are connected by the sixth reinforcing rib.

27. The balance shaft housing according to claim 25, characterized in that The lower shell is configured with a locking pin mounting hole, which passes through the lower shell and is used for inserting a locking pin of a balancing shaft.

28. The balance shaft housing according to claim 25, characterized in that The upper shell is provided with a plurality of first positioning pin holes, and the lower shell is provided with a plurality of second positioning pin holes. The plurality of first positioning pin holes and the plurality of second positioning pin holes correspond to each other one by one and are positioned and matched by positioning pins.

29. The balance shaft housing according to claim 25, characterized in that The balancing shaft upper housing and the balancing shaft lower housing jointly define a gear installation cavity, the gear installation cavity is communicated with the balancing shaft installation cavity, and the balancing shaft lower housing further includes: A plurality of seventh reinforcing ribs are provided on a surface of the lower shell facing away from the upper shell of the balancing shaft, and the plurality of seventh reinforcing ribs and the gear mounting cavity are arranged opposite to each other on two sides of the lower shell.

30. The balance shaft housing according to claim 29, characterized in that The upper housing of the balancing shaft and the lower housing of the balancing shaft jointly define a first bearing mounting hole, which is connected to the balancing shaft mounting cavity and the gear mounting cavity. The hole wall of the first bearing mounting hole is provided with a thrust step, which is used to cooperate with the axial limit of the bearing.

31. The balance shaft housing according to claim 30, characterized in that The upper housing of the balancing shaft and the lower housing of the balancing shaft jointly define a second bearing mounting hole, the second bearing mounting hole is arranged on a side of the balancing shaft mounting cavity away from the gear mounting cavity and is connected to the balancing shaft mounting cavity, the hole wall of the second bearing mounting hole is provided with a limiting groove, the limiting groove is provided with a retaining ring, and the retaining ring is used to cooperate with the axial stop of the balancing shaft.

32. A balance shaft assembly, characterized in that: include: A balance shaft housing according to any one of claims 24 to 31; A balancing shaft is arranged in the balancing shaft installation cavity.

33. An engine, characterized in that: Comprising a balance shaft assembly according to claim 32.

34. A powertrain, characterized in that: Comprising an engine according to claim 33.

35. A vehicle, characterized in that: Comprising an engine according to claim 33 or a powertrain according to claim 34.

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