Differential assembly for vehicle and vehicle

Abstract

The utility model relates to the technical field of differential mechanisms, and discloses a differential mechanism assembly for a vehicle and the vehicle. The differential mechanism assembly comprises a differential mechanism shell, a connecting shaft, a planetary gear and a half axle gear; the connecting shaft is arranged in the differential mechanism shell and fixedly connected with the differential mechanism shell. The number of the planetary gears is two, and the two planetary gears are arranged at the two axial ends of the connecting shaft in a sleeving mode correspondingly. The number of the half axle gears is two, and each half axle gear is meshed with the two planetary gears. A gasket is arranged between each planetary gear and the differential mechanism shell, the connecting shaft is sleeved with the gaskets, the gaskets are provided with opening parts, and the opening parts penetrate through the gaskets in the thickness direction of the gaskets. The sliding friction state of the differential assembly can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a differential assembly for a vehicle and the vehicle. Background Art

[0002] During operation, the planetary gear shims in a differential experience sliding friction with both the planetary gears and the differential housing, resulting in high frictional resistance and a high risk of overheating and unusual friction noise. Related technologies have primarily addressed this issue through the following solutions: adding a ribbed structure to the shim surface to increase the gap between the shims when they are in contact; surface treatment of the shims; and the addition of friction modifiers to the lubricant. While these technologies have achieved varying degrees of improvement in sliding friction under differential conditions, none of them completely resolves the issue of unusual differential noise. Utility Model Content

[0003] The present application provides a differential assembly for a vehicle and the vehicle, which reduces abnormal friction noise.

[0004] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, an embodiment of the present application provides a differential assembly for a vehicle, comprising a differential housing, a connecting shaft, planetary gears and half-shaft gears; the connecting shaft is disposed in the differential housing and fixedly connected to the differential housing; there are two planetary gears, which are respectively sleeved on the axial ends of the connecting shaft; there are two half-shaft gears, each of which is respectively engaged with the two planetary gears; wherein a gasket is provided between each planetary gear and the differential housing, the gasket is sleeved on the connecting shaft, and the gasket has an opening portion, and the opening portion passes through the gasket along the thickness direction of the gasket.

[0006] A differential assembly for a vehicle proposed in an embodiment of the present application has a gasket with an opening. The opening can increase the deformation ability of the gasket when the gasket is squeezed or rubbed, thereby reducing stress concentration. When the planetary gears rotate in the differential housing, the gasket is more likely to deform under the positive pressure of the planetary gears, thereby fitting with the differential housing, thereby increasing the sliding contact area, and reducing the probability of differential abnormal noise caused by sliding friction.

[0007] It can be understood that the opening can also serve to store lubricating oil. When the planetary gear rotates in the differential housing, the lubricating oil can enter the contact surface between the gasket and the planetary gear, and / or the gasket and the differential housing to provide lubrication, thereby reducing the occurrence of insufficient lubrication and dry friction and reducing abnormal differential noise.

[0008] Optionally, along the radial direction of the gasket, the gasket has an inner circumferential surface and an outer circumferential surface that are arranged opposite to each other, and the inner circumferential surface is surrounded by a through hole for the connecting shaft to pass through;

[0009] The opening penetrates the outer peripheral surface along the radial direction of the gasket, and the opening is spaced apart from the inner peripheral surface.

[0010] In the above scheme, along the radial direction of the gasket, the opening portion penetrates the outer peripheral surface, so that the lubricating oil can flow between the opening portion and the outer peripheral surface, providing a circulation channel for the lubricating oil to flow more easily, so that the lubricating oil can more easily flow into the gasket and the connecting shaft, and / or the gasket and the differential housing, which helps to form a more uniform oil film and improve the lubrication effect.

[0011] In addition, the opening can make it easier for the gasket to deform and fit with the differential housing when under pressure, thereby increasing the fitting area between the gasket and the differential housing, and then increasing the sliding contact area, thereby reducing the risk of differential abnormal noise caused by sliding friction and improving the reliability of the differential.

[0012] Optionally, there are multiple openings, and the multiple openings are arranged at intervals along the circumference of the gasket.

[0013] In the above scheme, multiple openings arranged at intervals can respectively reduce the stress concentration at different positions of the gasket, so that different positions of the gasket can be deformed to fit the differential housing, further increasing the sliding friction contact area of the gasket, thereby improving the sliding friction state of the planetary gear and reducing wear.

[0014] Optionally, the opening portion has a first side surface, a second side surface and a connecting surface. Along the circumference of the gasket, the first side surface and the second side surface are arranged opposite to each other, and the connecting surface connects the first side surface and the second side surface.

[0015] In the above scheme, the opening portion can disperse stress and help the gasket deform and fit the differential housing. At this time, the first side surface and the second side surface respectively have corresponding offsets relative to the connecting surface. The gap between the first side surface and the second side surface can facilitate the gasket to deform when subjected to extrusion or friction, thereby allowing the gasket to better fit the differential housing and the planetary gear.

[0016] Optionally, the first side surface is arranged in parallel with the second side surface, and the distance between the first side surface and the second side surface is a, which satisfies: 0.5 mm ≤ a ≤ 2 mm.

[0017] In the above scheme, since the distance between the first side surface and the second side surface meets the above range, on the one hand, it can ensure that the gasket and the differential housing have sufficient contact area, reduce stress concentration, and thus reduce the probability of abnormal sliding friction noise. On the other hand, it can ensure that the passage of the lubricating oil through the gasket is unobstructed, thereby improving the flow efficiency and speed of the lubricating oil, and helping to evenly distribute the lubricating oil on the gasket, thereby forming a stable lubricating film, reducing friction and wear, and ultimately improving the reliability of the differential.

[0018] Optionally, the first side surface is arranged in parallel with the second side surface, the distance between the first side surface and the second side surface is a, the number of the plurality of openings is N, the inner diameter of the via hole is D, and the following condition is satisfied: a*N≤D.

[0019] In the above solution, since the product of the number of openings and the distance between the first side surface and the second side surface is not greater than the inner diameter of the through hole, it can ensure that the gasket and the differential housing have sufficient contact area, reduce stress concentration, and thus reduce the probability of abnormal noise caused by sliding friction.

[0020] Optionally, the first side surface is arranged in parallel with the second side surface, and the distance between the first side surface and the second side surface is a; the connecting surface is constructed as a first arc surface, and the radius of the first arc surface is e1, satisfying that e1 / a=1 / 2.

[0021] In the above scheme, since e1 / a satisfies the above range, on the one hand, the connection between the connecting surface and the first side surface and the connection between the connecting surface and the second side surface can be made smoother, stress concentration can be reduced, stress can be transferred and dispersed more evenly, and the probability of fatigue damage due to long-term stress can be reduced. On the other hand, it can ensure that the gasket can be deformed more easily, so that the gasket and the differential case have sufficient contact area, reducing stress concentration, and thus reducing the probability of abnormal noise caused by sliding friction.

[0022] Optionally, the first side surface is arranged parallel to the second side surface, and the distance between the first side surface and the second side surface is a; the connecting surface includes a first segment, a second segment and a third segment connected in sequence, the first segment is connected to the first side surface and is constructed as a second arc surface, the third segment is connected to the second side surface and is constructed as a third arc surface, the second segment is constructed as a plane, the radius of the second arc surface and the radius of the third arc surface are both e2, satisfying: 1 / 3≤e2 / a<1 / 2.

[0023] In the above scheme, since e2 / a satisfies the above range, on the one hand, the connection between the first section and the first side surface can be smooth, and the connection between the third section and the second side surface can be smooth, thereby reducing stress concentration, being able to transfer and disperse stress more evenly, and reducing the probability of fatigue damage due to long-term stress; on the other hand, the size of the connecting surface in the radial direction of the gasket can be reduced, thereby ensuring that the size of the opening in the radial direction of the gasket is within a reasonable range, ensuring that the gasket still has sufficient structural strength.

[0024] Optionally, along the radial direction of the gasket, the maximum size of the opening is b, and the distance between the inner circumference and the outer circumference is c, satisfying: 0.7≤b / c≤0.9.

[0025] In the above scheme, since b / c meets the above range, on the one hand, it can ensure that the gasket has sufficient strength, and on the other hand, it can make the opening have a sufficient depth to reduce stress concentration, thereby reducing the probability of abnormal sliding friction noise. At the same time, it ensures smooth circulation of lubricating oil, ensuring the flow efficiency and speed of lubricating oil, and helps to evenly distribute the lubricating oil on the gasket, thereby forming a stable lubricating film, reducing friction and wear, and ultimately improving the reliability of the differential.

[0026] Optionally, along the radial direction of the gasket, the minimum distance between the opening and the inner circumferential surface is d, satisfying: d≥2mm.

[0027] In the above scheme, the minimum distance between the opening and the inner circumferential surface meets the above range. On the one hand, it can ensure that the gasket has sufficient strength. On the other hand, it can make the opening have a sufficient depth to reduce stress concentration, thereby reducing the probability of abnormal noise caused by sliding friction. At the same time, it ensures the smooth circulation of lubricating oil, the flow efficiency and speed of lubricating oil, and helps to evenly distribute the lubricating oil on the gasket, thereby forming a stable lubricating film, reducing friction and wear, and ultimately improving the reliability of the differential.

[0028] In a second aspect, embodiments of the present application provide a vehicle comprising the differential assembly described in any one of the embodiments. The vehicle provided in the embodiments of the present application alleviates the problem of abnormal noise in the differential assembly, at least to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of a differential assembly in some embodiments of the present application;

[0031] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at point B in the middle;

[0032] Figure 3 This is a schematic structural diagram of a gasket in some embodiments of the present application;

[0033] Figure 4 This is a schematic structural diagram of a gasket in some embodiments of the present application;

[0034] Figure 5 Schematic diagram of the structure of gaskets in other embodiments of the present application;

[0035] Figure 6 for Figure 5 A partially enlarged schematic diagram of the opening.

[0036] [Description of Reference Numerals]

[0037] 1: Differential housing;

[0038] 2: connecting shaft;

[0039] 3: Planetary gear;

[0040] 4: Axle gear;

[0041] 5: gasket; 50: opening; 501: first side surface; 502: second side surface; 503: connecting surface; 5031: first section; 5032: second section; 5033: third section;

[0042] 51: inner circumference; 52: outer circumference; 53: via. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0045] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0047] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0048] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0049] The automobile differential is a mechanism that enables the left and right drive wheels to rotate at different speeds. It is mainly composed of left and right half-shaft gears, two planetary gears and a gear rack. Its function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, that is, to ensure that the drive wheels on both sides perform pure rolling motion.

[0050] Conventional differential planetary gear spacers are spherical arc-shaped, with a central opening to mate with the planetary gears. The spacers are installed between the planetary gears and the differential housing, positioned by the planetary shaft passing through the planetary gears, planetary gear spacers, and differential housing. During operation, the differential planetary gears rotate relative to the planetary shaft and differential housing, and the spacers reduce sliding friction between the planetary gears and the differential housing.

[0051] When the differential planetary gear gasket is working, it has sliding friction with the planetary gear and the differential housing, and the friction resistance is large, which easily causes severe heating and abnormal friction noise. The main improvement solutions in the existing technology are: adding a drum-shaped structure to the gasket surface to increase the gap when the gasket is fitted to facilitate the formation of an oil film; the gasket adopts surface treatment (such as phosphating, nickel plating, adding wear-resistant coating, etc.) to reduce the sliding friction coefficient and increase the wear resistance of the gasket; adding friction modifiers to the lubricating oil to improve the microscopic sliding friction state.

[0052] However, although the existing technologies have different degrees of improvement on sliding friction under differential conditions, they cannot completely solve the problem of abnormal differential noise. Due to differences in part processing size, surface roughness, drum size, lubricating oil amount, etc., occasional abnormal differential noise occurs.

[0053] In view of this, in order to reduce the abnormal noise of differential, the embodiment of the present application provides a differential assembly for a vehicle, please refer to Figure 1 and Figure 2 , including a differential case 1, a connecting shaft 2, a planetary gear 3 and a side gear 4.

[0054] The connecting shaft 2 is arranged in the differential housing 1 and is fixedly connected to the differential housing 1. It can be understood that at this time the housing 1 and the connecting shaft 2 move together. When the housing 1 rotates under the drive of the driving member, the connecting shaft 2 also rotates with the rotation of the housing 1.

[0055] Furthermore, the fixed connection between connecting shaft 2 and differential housing 1 reduces energy loss due to friction and wear, ensuring the stability and reliability of connecting shaft 2 when transmitting power, helping to improve the transmission efficiency of the differential and ensuring smoother power transmission. The fixed connection between connecting shaft 2 and differential housing 1 also reduces the risk of failure due to loose or damaged connections, helping to improve the overall safety and reliability of the reducer.

[0056] There are two planetary gears 3, which are respectively mounted on the axial ends of the connecting shaft 2. It can be understood that each planetary gear 3 is rotatable relative to the connecting shaft 2. The two planetary gears 3 can respectively play the role of transmitting power, thereby realizing power diversion, helping to reduce energy loss in the transmission process, improving transmission efficiency and making power transmission more uniform and efficient.

[0057] The two planetary gears 3 are located at the axial ends of the connecting shaft 2, which can balance the load and reduce the force on a single gear, thereby improving the overall stability of the differential, helping to reduce vibration and noise, and improving the smoothness of the vehicle's driving.

[0058] There are two half-shaft gears 4, and each half-shaft gear 4 is engaged with two planetary gears 3 respectively. It can be understood that each planetary gear 3 can transmit power to the two half-shaft gears 4 at the same time, so that the power can be reasonably distributed to the two half-shaft gears 4, thereby improving the power diversion efficiency and thus improving the transmission efficiency.

[0059] In addition, due to power diversion, the stress between the planetary gear 3 and the side gear 4 is reduced, which reduces the stress concentration between the planetary gear 3 and the side gear 4, helps to improve the load-bearing capacity of the planetary gear 3 and the side gear 4 and extend their service life.

[0060] Among them, a gasket 5 is provided between each planetary gear 3 and the differential housing 1. It can be understood that the gasket 5 can reduce the friction between the planetary gear 3 and the differential housing 1. The gasket 5 is sleeved on the connecting shaft 2, which can avoid direct contact between the planetary gear 3 and the differential housing 1, thereby reducing the friction and wear between the planetary gear 3 and the differential housing 1, and further reducing the heat and noise generated by friction.

[0061] In addition, the gasket 5 has certain elasticity and damping properties, which can absorb vibration and impact generated during the transmission process, help protect the connecting shaft 2 and the differential housing 1 from damage, and thus improve the stability and durability of the differential.

[0062] The gasket 5 has an opening portion 50, and the opening portion 50 passes through the gasket 5 along the thickness direction of the gasket 5. It can be understood that the opening portion 50 can increase the deformation ability of the gasket 5 when the gasket 5 is squeezed or rubbed, thereby reducing stress concentration. When the planetary gear 3 rotates in the differential case 1, the gasket 5 is more likely to deform under the positive pressure of the planetary gear 3, thereby fitting with the differential case 1, thereby increasing the sliding contact area, thereby reducing the probability of differential abnormal noise caused by sliding friction.

[0063] It is understandable that the opening 50 can also serve to store lubricating oil. When the planetary gear 3 rotates in the differential housing 1, the lubricating oil can enter the contact surface between the gasket 5 and the planetary gear 3, and / or the gasket 5 and the differential housing 1 to provide lubrication, thereby reducing the occurrence of insufficient lubrication and dry friction.

[0064] In addition, the gasket 5 can also help dissipate heat, reduce the heat generated by friction, and maintain stable operation of the differential.

[0065] In other embodiments, along the radial direction of the gasket 5, the gasket 5 has an inner circumferential surface 51 and an outer circumferential surface 52 that are relatively arranged, and the inner circumferential surface 51 surrounds a through hole 53 for the connecting shaft 2 to pass through. It can be understood that the gasket 5 is sleeved on the connecting shaft 2 through the through hole 53.

[0066] Along the radial direction of the gasket 5, the opening portion 50 passes through the outer peripheral surface 52, so that the lubricating oil can flow between the opening portion 50 and the outer peripheral surface 52, providing a smoother flow channel for the lubricating oil, so that the lubricating oil can more easily flow into the gasket 5 and the connecting shaft 2, and / or the gasket 5 and the differential case 1, which helps to form a more uniform oil film and improve the lubrication effect.

[0067] In addition, the opening portion 50 that passes through the outer peripheral surface 52 can also make the gasket 5 more easily deform and fit with the differential housing 1 when subjected to pressure, thereby increasing the fitting area between the gasket 5 and the differential housing 1, and then increasing the sliding contact area, thereby reducing the risk of differential abnormal noise caused by sliding friction and improving the reliability of the differential.

[0068] In addition, the opening 50 that passes through the outer peripheral surface 52 can also promote heat dissipation. Since friction and wear will generate a certain amount of heat, the opening 50 helps to discharge the heat faster, thereby ensuring the stable operation of the differential.

[0069] The opening 50 is spaced apart from the inner circumferential surface 51 , that is, the opening 50 is not in communication with the inner circumferential surface 51 , which helps to improve the stability and durability of the gasket 5 .

[0070] In other embodiments, please refer to Figure 3-Figure 5 There are multiple openings 50. It can be understood that the multiple openings 50 can jointly reduce the stress concentration of the gasket 5, thereby further helping the gasket 5 to fit with the differential housing 1, increasing the sliding friction contact area, and further reducing the risk of differential abnormal noise caused by sliding friction.

[0071] Along the circumference of the gasket 5, multiple openings 50 are arranged at intervals. It can be understood that the multiple openings 50 arranged at intervals can respectively reduce the stress concentration at different positions of the gasket 5, so that different positions of the gasket 5 can be deformed so that they can fit into the differential case 1, further increasing the sliding friction contact area of the gasket 5, thereby improving the sliding friction state of the planetary gear 3 and reducing wear.

[0072] The opening portion 50 has a first side surface 501, a second side surface 502 and a connecting surface 503. Along the circumference of the gasket 5, the first side surface 501 and the second side surface 502 are relatively arranged. It can be understood that the first side surface 501 and the second side surface 502 can disperse stress along the circumference of the gasket 5, and the first side surface 501 and the second side surface 502 are relatively arranged, thereby forming a structure suitable for deformation of the gasket 5 along the circumference, which can facilitate radial deformation and fitting.

[0073] In addition, the first side surface 501 and the second side surface 502 are arranged relative to each other to form a fluid channel that is easy to flow, which helps to reduce the resistance of the lubricating oil when passing through the gasket 5, improves the flow efficiency and speed of the lubricating oil, and reduces the chance of uneven distribution of the lubricating oil on the gasket 5, thereby ensuring the generation of a stable and uniform oil film.

[0074] The connecting surface 503 connects the first side surface 501 and the second side surface 502. It can be understood that the opening portion 50 can disperse stress and help the gasket 5 to deform and fit the differential case 1. At this time, the first side surface 501 and the second side surface 502 are respectively offset relative to the connecting surface 503. The gap between the first side surface 501 and the second side surface 502 can facilitate the gasket 5 to deform when subjected to compression or friction, thereby allowing the gasket 5 to better fit the differential case 1 and the planetary gear 3.

[0075] In other embodiments, please refer to Figure 3-Figure 6 The first side surface 501 and the second side surface 502 are arranged in parallel, so that the opening portion 50 is more symmetrical in structure, forming a more stable structural frame, which helps to reduce stress unevenness and improve overall reliability.

[0076] In addition, the parallel arrangement of the first side surface 501 and the second side surface 502 can form a fluid channel that facilitates circulation, helping to ensure that the fluid is more evenly distributed on the gasket 5, helping to reduce the resistance of the fluid when passing through the gasket 5, and improving the flow efficiency and speed of the fluid, thereby forming a stable lubricating film, reducing friction and wear, and improving the reliability of the differential.

[0077] The distance between the first side surface 501 and the second side surface 502 is a, which satisfies: 0.5 mm ≤ a ≤ 2 mm.

[0078] It can be understood that since the distance between the first side surface 501 and the second side surface 502 meets the above range, on the one hand, it can ensure that the gasket 5 has sufficient contact area with the differential case 1, reduce stress concentration, and thus reduce the probability of abnormal noise caused by sliding friction. On the other hand, it can ensure that the passage of the lubricating oil through the gasket 5 is unobstructed, thereby improving the flow efficiency and speed of the lubricating oil, and helping to evenly distribute the lubricating oil on the gasket 5, thereby forming a stable lubricating film, reducing friction and wear, and ultimately improving the reliability of the differential.

[0079] In addition, the distance a satisfies the above range, which can ensure that the gasket 5 has sufficient structural rigidity, help reduce uneven stress distribution, and improve the overall stability of the gasket 5.

[0080] Optionally, the distance between the first side surface 501 and the second side surface 502 may be 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm, 1.5 mm, 1.7 mm, 1.9 mm, or 2 mm.

[0081] In other embodiments, please refer to Figure 4The first side surface 501 and the second side surface 502 are arranged in parallel, the distance between the first side surface 501 and the second side surface 502 is a, the number of the plurality of opening portions 50 is N, the inner diameter of the via hole 53 is D, and a*N≤D is satisfied.

[0082] It can be understood that since the product of the number of openings 50 and the distance between the first side surface 501 and the second side surface 502 is not greater than the inner diameter of the through hole 53, it can ensure that the gasket 5 and the differential case 1 have sufficient contact area, reduce stress concentration, and thus reduce the probability of abnormal noise caused by sliding friction.

[0083] In addition, it can ensure that the passage of lubricating oil through the gasket 5 is unobstructed, improve the flow efficiency and speed of the lubricating oil, and help to evenly distribute the lubricating oil on the gasket 5, thereby forming a stable lubricating film, reducing friction and wear, and ultimately improving the reliability of the differential.

[0084] In other embodiments, please refer to Figure 4 The first side surface 501 and the second side surface 502 are arranged in parallel, the distance between the first side surface 501 and the second side surface 502 is a, the connecting surface 503 is constructed as a first arc surface, the radius of the first arc surface is e1, and it satisfies that e1 / a=1 / 2.

[0085] That is to say, the connecting surface 503 is a complete semicircular arc surface, and the connecting surface 503 can be tangent to the first side surface 501 and the second side surface 502 respectively, ensuring a smooth transition between the connecting surface 503 and the first side surface 501, and a smooth transition between the connecting surface 503 and the second side surface, alleviating the stress concentration problem between the connecting surface 503 and the first side surface 501 and between the connecting surface and the second side surface 502, and reducing the probability of fatigue damage due to long-term stress.

[0086] At the same time, the connecting surface 503 smoothly transitions with the first side surface 501 and the second side surface 502 respectively, and can also facilitate the deformation of the gasket 5, ensuring that the gasket 5 has sufficient contact area with the differential housing 1, thereby reducing the probability of abnormal noise caused by sliding friction.

[0087] In some embodiments of the present application, Figure 5-Figure 6 As shown, the first side surface 501 and the second side surface 502 are arranged in parallel, and the distance between the first side surface 501 and the second side surface 502 is a; the connecting surface 503 includes a first section 5031, a second section 5032 and a third section 5033 connected in sequence, the first section 5031 is connected to the first side surface 501 and is constructed as a second arc surface, the third section 5033 is connected to the second side surface 502 and is constructed as a third arc surface, and the second section 5032 is constructed as a plane; the radius of the second arc surface and the radius of the third arc surface are both e2, satisfying: 1 / 3≤e2 / a<1 / 2.

[0088] The first section 5031 can be tangent to the first side surface 501, and the third section 5033 can be tangent to the second side surface 502. At the same time, the first section 5031 and the third section 5033 can also be tangent to the second section 5032 respectively. As a result, the first section 5031 and the first side surface 501 have a smooth transition, the third section 5033 and the second side surface 502 have a smooth transition, and the first section 5031, the second section 5032 and the third section 5033 also have a smooth transition among each other.

[0089] Since e2 / a satisfies the above range, on the one hand, the stress concentration problem between the first section 5031 and the first side surface 501 and between the third section 5033 and the second side surface 502 can be alleviated, and the stress can be transferred and dispersed more evenly, thereby reducing the probability of fatigue damage caused by long-term stress; on the other hand, the radial size of the connecting surface 503 of the gasket 5 can be reduced, thereby ensuring that the radial size of the opening portion 50 of the gasket 5 is within a reasonable range, ensuring that the gasket 5 has sufficient structural strength.

[0090] Optionally, e2 / a can be 1 / 3, 17 / 48, 3 / 8, 19 / 48, 5 / 12, 21 / 48, 11 / 24, 23 / 48.

[0091] In other embodiments, please refer to Figure 4 Along the radial direction of the gasket 5, the maximum size of the opening 50 is b, and the distance between the inner circumference 51 and the outer circumference 52 is c, satisfying: 0.7≤b / c≤0.9.

[0092] It can be understood that since b / c satisfies the above range, on the one hand, it can ensure that the gasket 5 has sufficient strength, and on the other hand, it can make the opening 50 have a sufficient depth to reduce stress concentration, thereby reducing the probability of abnormal sliding friction noise, while ensuring smooth circulation of lubricating oil, ensuring the flow efficiency and speed of lubricating oil, and helping to evenly distribute the lubricating oil on the gasket 5, thereby forming a stable lubricating film, reducing friction and wear, and ultimately improving the reliability of the differential.

[0093] Alternatively, b / c may be 0.7, 0.71, 0.73, 0.75, 0.77, 0.79, 0.81, 0.837, 0.85, 0.87, 0.89, or 0.9.

[0094] In other embodiments, please refer to Figure 4 , along the radial direction of the gasket 5 , the minimum distance between the opening 50 and the inner circumferential surface 51 is d, satisfying: d ≥ 2 mm.

[0095] It can be understood that the minimum distance between the opening 50 and the inner circumferential surface 51 satisfies the above range. On the one hand, it can ensure that the gasket 5 has sufficient strength. On the other hand, it can make the opening 50 have a sufficient depth to reduce stress concentration, thereby reducing the probability of abnormal noise caused by sliding friction. At the same time, it ensures smooth circulation of lubricating oil, ensures the flow efficiency and speed of lubricating oil, and helps to evenly distribute the lubricating oil on the gasket 5, thereby forming a stable lubricating film, reducing friction and wear, and ultimately improving the reliability of the differential.

[0096] Optionally, d can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0097] In other embodiments, the vehicle of the present invention includes the differential assembly described in any one of the embodiments. Since the vehicle of the present application includes the differential assembly of the above embodiments, the vehicle's differential noise is reduced.

[0098] An embodiment of the present application provides a differential assembly for a vehicle, comprising a differential housing 1, a connecting shaft 2, planetary gears 3 and half-shaft gears 4; the connecting shaft 2 is arranged in the differential housing 1 and fixedly connected to the differential housing 1; there are two planetary gears 3, and the two planetary gears 3 are respectively sleeved on the axial ends of the connecting shaft 2; there are two half-shaft gears 4, and each half-shaft gear 4 is respectively engaged with two planetary gears 3; wherein, a gasket 5 is provided between each planetary gear 3 and the differential housing 1, the gasket 5 is sleeved on the connecting shaft 2, the gasket 5 has an opening portion 50, and there are multiple opening portions 50, and the multiple opening portions 50 are arranged at intervals along the circumference of the gasket 5, and the opening portion 50 passes through the gasket 5 along the thickness direction of the gasket 5.

[0099] Along the radial direction of the gasket 5, the gasket 5 has an inner circumferential surface 51 and an outer circumferential surface 52 that are oppositely disposed. The inner circumferential surface 51 defines a through-hole 53 for the connecting shaft 2 to pass through. From the inner circumferential surface 51 to the outer circumferential surface 52, an opening 50 extends through the outer circumferential surface 52 and is spaced apart from the inner circumferential surface 51. The opening 50 has a first side surface 501, a second side surface 502, and a connecting surface 503. Along the circumference of the gasket 5, the first side surface 501 and the second side surface 502 are oppositely disposed. The connecting surface 503 connects the first side surface 501 and the second side surface 502.

[0100] The first side surface 501 and the second side surface 502 are both connected to the outer peripheral surface 52 , the connecting surface 503 is spaced apart from the outer peripheral surface 52 , and the connecting surface 503 is spaced apart from the inner peripheral surface 51 .

[0101] The first side surface 501 and the second side surface 502 are arranged in parallel, and the distance between the first side surface 501 and the second side surface 502 is a, satisfying: 0.5mm≤a≤2mm; the number of the multiple opening portions 50 is N, and the inner diameter of the through hole 53 is D, satisfying: a*N≤D; along the radial direction of the gasket 5, the maximum size of the opening portion 50 is b, and the distance between the inner circumference 51 and the outer circumference 52 is c, satisfying: 0.7≤b / c≤0.9; along the radial direction of the gasket 5, the minimum distance between the opening portion 50 and the inner circumference 51 is d, satisfying: d≥2mm.

[0102] The washer 5 and planetary gear 3 are mounted on the connecting shaft 2 and together in the planetary shaft hole of the differential case 1. The washer 5 is located between the planetary gear 3 and the spherical structure of the differential case 1. When the electric drive assembly is operating in the differential state, the left and right side gears 4 rotate at different speeds, causing the planetary gear 3 to rotate around its axis. This creates sliding friction between the planetary gear 3, the washer 5, and the differential case 1. When the side gears 4 mesh with the planetary gear 3 to transmit torque, the axial force generated by the bevel gears is the positive pressure of the sliding friction of the planetary gear 3.

[0103] By way of example, a vehicle includes a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. New energy vehicles include, but are not limited to, pure electric vehicles, hybrid vehicles, or extended-range vehicles. Batteries are located at the vehicle's base, front, or rear. The batteries power the vehicle. They serve as the vehicle's operating power source, providing power to the vehicle's circuit systems, including those required for starting, navigation, and operation.

[0104] The vehicle also includes a controller and a motor. The controller is used to control the battery to power the motor, including meeting the vehicle's working power requirements during starting, navigation and driving.

[0105] In some embodiments of the present application, the battery can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0106] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0107] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0108] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

[0109] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A differential assembly for a vehicle, characterized in that: include: differential housing; a connecting shaft, disposed in the differential housing and fixedly connected to the differential housing; Planetary gears, there are two planetary gears, and the two planetary gears are respectively sleeved on the axial ends of the connecting shaft; Side gears, there are two side gears, each of which is meshed with two of the planetary gears; A gasket is provided between each of the planetary gears and the differential housing. The gasket is sleeved on the connecting shaft. The gasket has an opening portion. The opening portion passes through the gasket along the thickness direction of the gasket.

2. The differential assembly according to claim 1, characterized in that Along the radial direction of the gasket, the gasket has an inner circumferential surface and an outer circumferential surface that are opposite to each other, and the inner circumferential surface is surrounded by a through hole for the connecting shaft to pass through; The opening penetrates the outer peripheral surface along a radial direction of the gasket, and the opening is spaced apart from the inner peripheral surface.

3. The differential assembly according to claim 2, characterized in that There are a plurality of openings, and the plurality of openings are arranged at intervals along the circumference of the gasket.

4. The differential assembly according to claim 3, characterized in that The opening portion has a first side surface, a second side surface and a connecting surface. Along the circumference of the gasket, the first side surface and the second side surface are arranged opposite to each other, and the connecting surface connects the first side surface and the second side surface.

5. The differential assembly according to claim 4, characterized in that: The first side surface is arranged in parallel with the second side surface, and a distance a between the first side surface and the second side surface satisfies the following: 0.5 mm ≤ a ≤ 2 mm.

6. The differential assembly according to claim 4, characterized in that The first side surface is arranged in parallel with the second side surface, a distance between the first side surface and the second side surface is a, the number of the plurality of openings is N, an inner diameter of the via hole is D, and the relationship a*N≤D is satisfied.

7. The differential assembly according to claim 4, wherein: The first side surface is arranged parallel to the second side surface, and a distance between the first side surface and the second side surface is a; The connecting surface is configured as a first arc surface, the radius of the first arc surface is e1, and the relationship e1 / a=1 / 2 is satisfied.

8. The differential assembly according to claim 4, wherein: The first side surface is arranged parallel to the second side surface, and a distance between the first side surface and the second side surface is a; The connecting surface includes a first segment, a second segment and a third segment connected in sequence, the first segment is connected to the first side surface and is constructed as a second arc surface, the third segment is connected to the second side surface and is constructed as a third arc surface, the second segment is constructed as a plane, the radius of the second arc surface and the radius of the third arc surface are both e2, satisfying: 1 / 3≤e2 / a<1 / 2.

9. The differential assembly according to claim 2, wherein: Along the radial direction of the gasket, the maximum size of the opening is b, and the distance between the inner circumferential surface and the outer circumferential surface is c, satisfying: 0.7≤b / c≤0.

9.

10. The differential assembly according to claim 2, wherein: Along the radial direction of the gasket, the minimum distance between the opening and the inner circumferential surface is d, which satisfies: d≥2mm.

11. A vehicle, characterized in that: The differential assembly comprises the differential assembly according to any one of claims 1 to 10.

Images