Reduction gear case, reduction gear and vehicle

Abstract

The application relates to a reducer box, a reducer and a vehicle, and relates to the technical field of vehicles. The reducer box comprises a first shell, a second shell and a first sealing piece, the first shell comprises a first body part and a first extension part connected with the first body part; the second shell comprises a second body part and a second extension part connected with the second body part, the first body part and the second body part define a containing cavity for containing a reduction gear, the first extension part is provided with a first oil hole, the second extension part is provided with a second oil hole, the first oil hole and the second oil hole are communicated to form a high-pressure oil hole; the first sealing piece is arranged between the first body part and the second body part and surrounds the containing cavity, and the first extension part and the second extension part are arranged outside the first sealing piece. The reducer box provided by the application solves the problem of poor sealing performance of the reducer box.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a reducer housing, a reducer, and a vehicle. Background Technology

[0002] A vehicle's powertrain typically includes a speed reducer, which enables speed conversion within the powertrain system, such as converting the engine's high-speed, low-torque power into low-speed, high-torque power. This power is then transmitted to the wheels to propel the vehicle. The speed reducer usually includes a reducer housing, which is the outer shell of the reducer and houses internal components such as gears, bearings, and lubricants.

[0003] In the prior art, a reducer housing is provided. The reducer housing structure includes a front housing, a rear housing, and a connecting column. The front housing and the rear housing are sealed together, forming a cavity structure to accommodate the reducer. The connecting column is disposed within the cavity structure and is detachably or partially detachably connected between the front housing and the rear housing. The connection method between the connecting column and the front housing and the rear housing is bolted or integrally cast. Both ends of the connecting column are connected and fixed to the front housing and the rear housing respectively by one or more bolts. The connecting column is integrally cast to either the front housing or the rear housing, and fixed to the other by one or more bolts.

[0004] The sealing performance between the front and rear housings of the gearbox in the existing technology is poor, which easily leads to oil leakage. Utility Model Content

[0005] One objective of this application is to provide a light-emitting component to solve the problem of how to improve the sealing performance of a gearbox housing. A second objective of this application is to provide a gearbox. A third objective of this application is to provide a vehicle.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, embodiments of this application provide a reducer housing, the reducer housing including a first housing, a second housing, and a first seal. The first housing includes a first body portion and a first extension portion connected to the first body portion; the second housing includes a second body portion and a second extension portion connected to the second body portion, the first body portion and the second body portion defining a receiving cavity for accommodating a reduction gear, the first extension portion having a first oil hole, the second extension portion having a second oil hole, the first oil hole and the second oil hole communicating to form a high-pressure oil hole; the first seal is disposed between the first body portion and the second body portion and surrounds the receiving cavity, the first extension portion and the second extension portion being disposed outside the first seal.

[0007] According to the above-mentioned technical means, a receiving cavity for accommodating the reduction gear is defined by the first body part and the second body part. The lubricating oil in the receiving cavity, due to the oil pressure generated by the high-speed rotation of the gear inside the receiving cavity, continuously acts on the inner edge of the seal. The first seal is located between the first body part and the second body part and surrounds the receiving cavity. That is, the sealing position of the first seal is the edge of the first body part and the second body part away from the first extension and the second extension, as well as the connection position between the first extension and the first body part and the connection position between the second extension and the second body part. In this way, the first seal forms a closed annular sealing surface around the edge of the receiving cavity, covering the gap between the first body part and the second body part, and the first seal is pressed tightly by the first body part and the second body part to prevent the lubricating oil inside the receiving cavity from leaking from the joint of the first body part and the second body part, thereby improving the sealing performance of the reducer housing.

[0008] In some embodiments, at least one of the first body portion and the second body portion is provided with a first sealing groove, and at least a portion of the first seal is disposed within the first sealing groove.

[0009] According to the above technical means, by providing a first sealing groove in at least one of the first body part and the second body part, and the first sealing element is disposed in the first sealing groove, the first sealing groove can help the sealing element to be positioned and stressed stably, avoid the deformation of the first body part and the second body part from affecting the fit of the sealing element, and further improve the sealing reliability of the accommodating cavity.

[0010] In some embodiments, a second seal is further included, which is disposed between the first extension and the second extension and extends along the outer edges of the first extension and the second extension. The second seal is connected to the first seal to form an annular sealing structure surrounding the high-pressure oil hole.

[0011] According to the above-mentioned technical means, the second seal extends along the outer edges of the first and second extensions, and the second seal connects with the first seal to form an annular sealing structure. This annular sealing structure surrounds the high-pressure oil hole, enclosing the gap at the joint of the first and second extensions within the annular sealing structure, thus reducing the risk of leakage from the high-pressure oil hole. The annular sealing structure also prevents external contaminants from entering the high-pressure oil hole, avoiding impurities from mixing into the high-pressure oil and causing gear lubrication failure.

[0012] In some embodiments, at least one of the first extension and the second extension is provided with a second sealing groove, and at least a portion of the second seal is disposed within the second sealing groove.

[0013] According to the above technical means, by providing a second sealing groove in at least one of the first extension and the second extension, the sealing element is disposed in the second sealing groove. The second sealing groove can help the sealing element to be positioned and stressed stably, avoid the deformation of the first extension and the second extension from affecting the fit of the sealing element, and further improve the sealing reliability of the high pressure oil hole.

[0014] In some embodiments, a third seal is further included, which is disposed between the first extension and the second extension and is located inside the second seal, and is arranged around the high-pressure oil hole.

[0015] According to the above technical means, the third seal is arranged around the high-pressure oil hole. The third seal is a sealing structure at the joint gap of the high-pressure oil hole. The third seal can block the source of leakage. As soon as the oil seeps out, it is intercepted and cannot spread to the outside. This fundamentally avoids the oil from contacting other gaps inside the first extension and the second extension.

[0016] In some embodiments, the first body portion is provided with a first mounting hole, the second body portion is provided with a second mounting hole, and the reducer housing further includes fasteners that pass through the first mounting hole and the second mounting hole.

[0017] According to the aforementioned technical means, when the reducer is working, the gears inside the accommodating cavity generate radial force, and the lubricating oil inside the accommodating cavity generates axial pressure, causing deformation of the first and second body parts. This deformation can lead to the seal separating from the sealing groove and the annular sealing structure becoming twisted, resulting in oil leakage. After the fasteners are inserted into the aligned first and second mounting holes, the force of the fasteners achieves a tight fit between the first and second body parts, ensuring that the first seal and the first sealing groove are in an effective sealing state, reducing the risk of oil leakage.

[0018] In some embodiments, there are multiple first mounting holes arranged circumferentially along the receiving cavity, and a first extension is located between two adjacent first mounting holes; there are multiple second mounting holes arranged circumferentially along the receiving cavity, and a second extension is located between two adjacent second mounting holes.

[0019] According to the above-mentioned technical means, the first mounting hole and the second mounting hole are evenly distributed along the accommodating cavity, forming a ring-shaped fastening layout. When the first body part and the second body part are subjected to the radial force of the gear, the tensile force of the fastener can limit the expansion of the first body part and the second body part. The first seal will not detach from the sealing groove due to the deformation of the first body part and the second body part, ensuring the integrity of the sealing boundary of the accommodating cavity and further improving the sealing performance between the first body part and the second body part.

[0020] In some embodiments, the first seal is a sealing ring or sealant.

[0021] According to the above-mentioned technical means, the sealing ring forms a uniform contact pressure between the sealing surfaces of the first body and the second body through its own elastic deformation or mechanical structure compression, which can effectively prevent the leakage of lubricating oil.

[0022] After curing, the sealant not only prevents the leakage of lubricating oil in the cavity, but also bonds the first and second body parts together, improving structural strength and reducing the risk of sealing failure of the first and second body parts due to vibration and impact.

[0023] Secondly, embodiments of this application also provide a speed reducer, including the speed reducer housing described above.

[0024] Since the reducer provided in this application includes the reducer housing in the first aspect, it can solve the same technical problems as the reducer housing described above and achieve the same technical effects, so it will not be described again here.

[0025] Thirdly, embodiments of this application also provide a vehicle including the aforementioned reducer.

[0026] Since the vehicle provided in this application includes the reducer in the second aspect, it can solve the same technical problems as the reducer described above and achieve the same technical effects, so it will not be described again here. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0028] Figure 1 This is a schematic diagram of the structure of the reducer housing provided in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the structure of the first extension in the reducer housing provided in the embodiment; Figure 3 for Figure 1 A schematic diagram of the structure of the second extension in the reducer housing provided in the embodiment.

[0029] Figure label: 100 - Gearbox housing; 110 - First housing; 111 - First body portion; 112 - First extension portion; 1121 - First oil hole; 120 - Second housing; 121 - Second body portion; 122 - Second extension portion; 1221 - Second oil hole; 130 - Receiving cavity; 140 - High-pressure oil hole; 150 - First sealing groove; 160 - Second sealing groove; 170 - Third sealing groove; 181 - First mounting hole; 182 - Second mounting hole. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0034] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0035] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0036] Please see Figures 1-3 This application provides a vehicle. The vehicle can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, a gasoline vehicle, etc.

[0037] In some embodiments, the vehicle includes a power system, which includes a drive component and a reducer. The drive component can be a drive motor, a generator, etc. The drive component is connected to the reducer, which is used to reduce the speed and amplify the torque, etc., to meet the requirements of low-speed acceleration and high-speed range of the vehicle.

[0038] In some examples, the reducer can be a single-stage reducer, a multi-stage reducer, etc., and this application does not specifically limit it. This application is illustrated by way of an example of a reducer used in a vehicle.

[0039] In some embodiments, the reducer further includes a reducer housing 100, which is the outer shell of the reducer. The reducer housing 100 is used to house and fix the internal components of the reducer, such as gears and bearings. For example, the reducer housing 100 may contain a driving gear and a driven gear that mesh, with the driving gear having a smaller diameter than the driven gear and a smaller number of teeth than the driven gear. This meshing of the driving gear and driven gear achieves the purpose of speed reduction.

[0040] In some embodiments, the reducer housing 100 includes a first housing 110, a second housing 120, and a first seal. The first housing 110 includes a first body portion 111 and a first extension portion 112 connected to the first body portion 111. The second housing 120 includes a second body portion 121 and a second extension portion 122 connected to the second body portion 121. The first body portion 111 and the second body portion 121 define a receiving cavity 130 for receiving a reduction gear. For example, the reduction gear can be the driving gear and driven gear described above.

[0041] The first extension 112 is provided with a first oil hole 1121, and the second extension 122 is provided with a second oil hole 1221. The first oil hole 1121 and the second oil hole 1221 are connected to form a high-pressure oil hole 140. The high-pressure oil hole 140 can inject lubricating oil through an oil pump to the parts that need lubrication, such as bearings or gears, to achieve more effective lubrication, reduce friction and wear, and extend the service life of the reducer.

[0042] The first sealing element is disposed between the first body portion 111 and the second body portion 121 and surrounds the receiving cavity 130, and the first extension portion 112 and the second extension portion 122 are disposed on the outside of the first sealing element.

[0043] In other words, the first seal is located at the edges of the first body portion 111 and the second body portion 121 away from the first extension portion 112 and the second extension portion 122, as well as at the connection points of the first extension portion 112 and the first body portion 111, and the second extension portion 122 and the second body portion 121. In this way, the first seal forms a closed annular sealing surface around the edge of the accommodating cavity 130, covering the gap between the first body portion 111 and the second body portion 121, and pressing the first seal tightly through the first body portion 111 and the second body portion 121 to prevent the lubricating oil inside the accommodating cavity 130 from leaking from the joint between the first body portion 111 and the second body portion 121, thereby improving the sealing performance of the reducer housing 100.

[0044] Specifically, the first body portion 111 and the second body portion 121 define a receiving cavity 130 for accommodating the reduction gear. The lubricating oil in the receiving cavity 130 continuously acts on the inner edge of the seal due to the oil pressure generated by the high-speed rotation of the gear inside the receiving cavity 130. The first seal is disposed between the first body portion 111 and the second body portion 121 and surrounds the receiving cavity 130.

[0045] On the one hand, the first seal forms a closed annular sealing surface around the edge of the accommodating cavity 130, covering the gap between the first body part 111 and the second body part 121, preventing the lubricating oil inside the accommodating cavity 130 from leaking from the joint between the first body part 111 and the second body part 121.

[0046] On the other hand, the first seal can also prevent dust, water, impurities and other contaminants from the outside of the reducer housing 100 from entering the accommodating cavity 130, and prevent the components inside the accommodating cavity 130 from being worn or failing due to contamination.

[0047] In some embodiments, at least one of the first body portion 111 and the second body portion 121 is provided with a first sealing groove 150, and at least a portion of the first sealing element is disposed within the first sealing groove 150. The first sealing groove 150 can help the sealing element to be positioned and stressed stably, avoid deformation of the first body portion 111 and the second body portion 121 from affecting the fit of the sealing element, and further improve the sealing reliability of the receiving cavity 130.

[0048] This application is illustrated by way of example, with a first sealing groove 150 provided on the first body part 111.

[0049] In some examples, the first sealing groove 150 is a rectangular groove, meaning that the cross-section of the first sealing groove 150 is rectangular, and the cross-section is perpendicular to the length direction of the first sealing groove 150. Rectangular grooves are simple to manufacture and can provide stable circumferential support for the first seal, preventing irregular deformation of the first seal due to compression.

[0050] In other examples, the first sealing groove 150 is a trapezoidal groove, meaning that the cross-section of the first sealing groove 150 is trapezoidal. The width of the trapezoidal groove is slightly narrower on the side near the receiving cavity 130 and slightly wider on the outer side. When the internal pressure of the receiving cavity 130 increases, the first seal will be pushed towards the inner side of the trapezoidal groove. The tighter the first seal fits against the wall of the trapezoidal groove, the lower the risk of lubricating oil leakage.

[0051] In some examples, the surface roughness of the groove wall of the first sealing groove 150 can be increased by sandblasting or knurling processes to improve the sealing stability between the first seal and the first sealing groove 150.

[0052] In some other examples, the shape of the first sealing groove 150 may also be a U-shaped groove, etc.

[0053] In some embodiments, the reducer housing 100 further includes a second seal, which is disposed between the first extension 112 and the second extension 122 and extends along the outer edges of the first extension 112 and the second extension 122. The second seal is connected to the first seal to form an annular sealing structure surrounding the high-pressure oil hole 140. That is, the portion of the first seal located between the first body portion 111 and the first extension 112 forms an annular sealing structure with the second seal.

[0054] In this way, on the one hand, the second seal extends along the outer edge of the first extension 112 and the second extension 122, and the second seal is connected with the first seal to form an annular sealing structure. The annular sealing structure surrounds the high-pressure oil hole 140 and wraps the gap between the splicing surfaces of the first extension 112 and the second extension 122 inside the annular sealing structure, reducing the risk of leakage from the high-pressure oil hole 140.

[0055] On the other hand, the annular sealing structure also blocks external contaminants from entering the high-pressure oil hole 140, preventing impurities from mixing into the high-pressure oil and causing gear lubrication failure.

[0056] In some examples, the first seal and the second seal can be an integral structure or a separate structure; this application does not specifically limit this.

[0057] In some embodiments, at least one of the first extension 112 and the second extension 122 is provided with a second sealing groove 160, and at least a portion of the second seal is disposed within the second sealing groove 160. The second sealing groove 160 helps to position and stabilize the seal, preventing deformation of the first extension 112 and the second extension 122 from affecting the seal's fit, and further improving the sealing reliability of the high-pressure oil hole 140.

[0058] In some examples, the connection between the second seal and the second sealing groove 160 can be the same as the connection between the first seal and the first sealing groove 150 in any of the above embodiments, and will not be described in detail here. In other examples, the connection between the second seal and the second sealing groove 160 can also be different from the connection between the first seal and the first sealing groove 150, and this application does not specifically limit this.

[0059] In some embodiments, the reducer housing 100 further includes a third seal, which is disposed between the first extension 112 and the second extension 122 and is located inside the second seal. The third seal surrounds the high-pressure oil hole 140.

[0060] Specifically, a third seal is disposed around the high-pressure oil hole 140. This third seal is a sealing structure located at the joint gap of the high-pressure oil hole 140. The third seal can block the source of leakage; any oil that seeps out is intercepted and cannot spread outwards, fundamentally preventing the oil from contacting other gaps inside the first extension 112 and the second extension 122. Furthermore, the third seal and the annular sealing structure can form a double seal, further preventing oil leakage from the high-pressure oil hole 140.

[0061] In some embodiments, at least one of the first extension 112 and the second extension 122 is provided with a third sealing groove 170, and at least a portion of the third seal is disposed within the third sealing groove 170.

[0062] In some examples, the connection between the third seal and the third sealing groove 170 can be the same as the connection between the first seal and the first sealing groove 150 in any of the above embodiments, and will not be described in detail here. In other examples, the connection between the third seal and the third sealing groove 170 can also be different from the connection between the first seal and the first sealing groove 150, and this application does not specifically limit this.

[0063] In some embodiments, the first body portion 111 is provided with a first mounting hole 181, the second body portion 121 is provided with a second mounting hole 182, and the reducer housing 100 further includes fasteners that pass through the first mounting hole 181 and the second mounting hole 182.

[0064] Specifically, when the reducer is working, the gears inside the receiving cavity 130 generate radial force, and the lubricating oil inside the receiving cavity 130 generates axial pressure, causing the first body part 111 and the second body part 121 to deform. This deformation can lead to the seal separating from the sealing groove and the annular sealing structure becoming twisted, resulting in oil leakage. After the fasteners are inserted into the aligned first mounting holes 181 and second mounting holes 182, the force of the fasteners achieves a tight fit between the first body part 111 and the second body part 121, and presses the first seal, so that the first seal and the first sealing groove 150 are in an effective sealing state, reducing the risk of oil leakage.

[0065] In some examples, the first mounting hole 181 and the second mounting hole 182 can be threaded holes, and the fasteners are screws, bolts, etc. The fasteners pass through the threaded holes to achieve sealing and fixing of the first body part 111 and the second body part 121.

[0066] In some examples, the first mounting hole 181 and the second mounting hole 182 can be tapered holes, and the fasteners can be tapered bolts, which improves the positioning accuracy of the first body part 111 and the second body part 121 during installation.

[0067] In other examples, the first mounting hole 181 and the second mounting hole 182 can also be a slotted hole, an irregular hole, etc., as long as they can be connected to the first mounting hole 181 and the second mounting hole 182 by fasteners, so as to fix the first body part 111 and the second body part 121.

[0068] In some embodiments, there are multiple first mounting holes 181, and the multiple first mounting holes 181 are arranged circumferentially along the receiving cavity 130, wherein the circumferential direction of the receiving cavity 130 refers to the direction around which the first seal is surrounded, that is, the direction in which the first seal extends.

[0069] The first extension 112 is located between two adjacent first mounting holes 181; there are multiple second mounting holes 182 arranged along the circumference of the receiving cavity 130, and the second extension 122 is located between two adjacent second mounting holes 182.

[0070] Specifically, the first mounting hole 181 and the second mounting hole 182 are evenly distributed along the accommodating cavity 130, forming a ring-shaped fastening arrangement. When the first body portion 111 and the second body portion 121 are subjected to the radial force of the gear, the tension of the fastener can limit the expansion of the first body portion 111 and the second body portion 121. The first seal will not detach from the sealing groove due to the deformation of the first body portion 111 and the second body portion 121, ensuring the integrity of the sealing boundary of the accommodating cavity 130 and further improving the sealing performance between the first body portion 111 and the second body portion 121.

[0071] In some examples, a small spacing range is provided between two adjacent first mounting holes 181, which can be 50mm-80mm. For example, it can be 50mm, 60mm, 70mm, 80mm, etc. This can increase the mounting strength of the first body part 111 and the second body part 121 and prevent the first body part 111 and the second body part 121 from deforming and shifting.

[0072] In some examples, a larger spacing range is provided between two adjacent first mounting holes 181, which can be 100mm-150mm. For example, it can be 100mm, 110mm, 130mm, 150mm, etc. Setting a larger spacing range between two adjacent first mounting holes 181 can reduce the weakening of the openings in the reducer housing 100.

[0073] In some embodiments, the first seal is a sealing ring. The sealing ring forms a uniform contact pressure between the sealing surfaces of the first body portion 111 and the second body portion 121 through its own elastic deformation or mechanical compression, which can effectively prevent the leakage of lubricating oil.

[0074] In some examples, the sealing ring can be made of nitrile rubber, which has excellent oil resistance, good elasticity, and low cost.

[0075] In other examples, the sealing ring can be made of fluororubber, which has strong temperature resistance, excellent chemical corrosion resistance, and good aging resistance.

[0076] In other examples, the sealing ring can also be made of hydrogenated nitrile rubber, silicone rubber, polytetrafluoroethylene, etc.

[0077] In some embodiments, the first sealant is a sealant. After curing, the sealant can not only prevent the leakage of lubricating oil in the accommodating cavity 130, but also bond the first body part 111 and the second body part 121 into a whole, improve the structural strength, and reduce the risk of sealing failure of the first body part 111 and the second body part 121 due to vibration and impact.

[0078] In some examples, the sealant material can be a silicone sealant, which has an extremely wide temperature range and can withstand the drastic temperature changes during the start-up and shutdown of the gearbox.

[0079] In other examples, the sealant material can be a polyurethane sealant, which has high mechanical strength and forms a tough elastomer after curing. It has excellent tear resistance and can withstand the periodic stress caused by the vibration of the reducer.

[0080] In other examples, the sealant material can also be anaerobic sealant, nitrile rubber sealant, etc.

[0081] In some examples, the structure and material of the second and third sealing rings can be the same as those of the first sealing ring in any of the above embodiments, and will not be described in detail here. In other examples, the structure and material of the second and third sealing rings can also be different from those of the first sealing ring described above, and this application does not specifically limit them.

[0082] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0083] The application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the application to the described embodiments. Furthermore, those skilled in the art will understand that the application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. A reducer housing, characterized in that, include: The first housing (110) includes a first body portion (111) and a first extension portion (112) connected to the first body portion (111). The second housing (120) includes a second body portion (121) and a second extension portion (122) connected to the second body portion (121). The first body portion (111) and the second body portion (121) define a receiving cavity (130) for receiving a reduction gear. The first extension portion (112) is provided with a first oil hole (1121), and the second extension portion (122) is provided with a second oil hole (1221). The first oil hole (1121) and the second oil hole (1221) communicate to form a high-pressure oil hole (140). A first seal is disposed between the first body portion (111) and the second body portion (121) and surrounds the receiving cavity (130), and the first extension portion (112) and the second extension portion (122) are disposed on the outside of the first seal.

2. The reducer housing according to claim 1, characterized in that, At least one of the first body part (111) and the second body part (121) is provided with a first sealing groove (150), and at least a portion of the seal is provided in the first sealing groove (150).

3. The reducer housing according to claim 1, characterized in that, It also includes a second seal, which is disposed between the first extension (112) and the second extension (122) and extends along the outer edges of the first extension (112) and the second extension (122). The second seal is connected to the first seal to form an annular sealing structure surrounding the high-pressure oil hole (140).

4. The reducer housing according to claim 3, characterized in that, At least one of the first extension (112) and the second extension (122) is provided with a second sealing groove (160), and at least a portion of the second seal is disposed in the second sealing groove (160).

5. The reducer housing according to claim 3, characterized in that, It also includes a third seal, which is disposed between the first extension (112) and the second extension (122) and located inside the second seal, and the third seal is disposed around the high-pressure oil hole (140).

6. The reducer housing according to claim 1, characterized in that, The first body part (111) is provided with a first mounting hole (181), the second body part (121) is provided with a second mounting hole (182), and the reducer housing (100) also includes fasteners, which pass through the first mounting hole (181) and the second mounting hole (182).

7. The reducer housing according to claim 6, characterized in that, The number of the first mounting holes (181) is multiple, and the multiple first mounting holes (181) are arranged circumferentially along the receiving cavity (130), and the first extension (112) is located between two adjacent first mounting holes (181); The number of the second mounting holes (182) is multiple, and the multiple second mounting holes (182) are arranged circumferentially along the accommodating cavity (130), and the second extension (122) is located between two adjacent second mounting holes (182).

8. The reducer housing according to claim 1, characterized in that, The first sealing element is a sealing ring or sealant.

9. A speed reducer, characterized in that, The gearbox housing (100) includes any one of claims 1-8.

10. A vehicle, characterized in that, Includes the speed reducer as described in claim 9.

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