Differential structure and vehicle

Abstract

The embodiment of the utility model relates to the technical field of differential mechanisms, and discloses a differential mechanism structure and a vehicle, and the differential mechanism structure comprises a differential mechanism shell, a half axle gear and an oil seal part. One end of the half axle gear is located in the differential shell, and the other end extends out of the differential shell. A second mounting hole extending in the axial direction is formed in the half axle gear, and the half axle extends into the second mounting hole and is matched with the second mounting hole, so that the half axle gear is connected with the half axle. And the oil seal piece sleeves one end, extending out of the differential shell, of the half axle gear. The oil seal piece extends out of the differential shell and sleeves the periphery of the half axle gear, so that the half axle can be prevented from being in contact with the oil seal piece in the process that the half axle extends into the second mounting hole and is connected with the half axle gear, and the situation that the half axle scratches the oil seal piece can be effectively reduced or avoided; and the sealing performance of the oil seal is prevented from being influenced by scratching of the oil seal, so that the reliability and the stability of the oil seal are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of differentials, in particular to a differential structure and a vehicle. Background Art

[0002] With the continuous development of social economy, cars, as the most commonly used means of transportation for people, are becoming more and more common in people's lives. Among them, new energy vehicles use motors as their power source, which have low operating costs, no exhaust emissions, and are environmentally friendly. As people's environmental awareness continues to increase, new energy vehicles are becoming more and more popular.

[0003] New energy vehicles usually include a differential, which is used to connect to the half-axle of the vehicle to transmit power to the half-axle, so that the vehicle can run. Among them, the differential usually includes a differential housing, a half-axle gear and an oil seal. Among them, a mounting hole is opened on the housing, and the oil seal is located on the outside of the housing and surrounded by the outer periphery of the mounting hole. The half-axle gear is located in the housing, and the half-axle passes through the oil seal and the mounting hole in turn and extends into the housing to connect with the half-axle gear.

[0004] However, in the above mechanism, when the half shaft passes through the oil seal and the mounting hole and cooperates with the half shaft gear, the half shaft is likely to scratch the oil seal, thereby affecting the sealing performance of the oil seal. Utility Model Content

[0005] In view of this, the utility model provides a differential structure and a vehicle, which can effectively reduce or avoid the half-shaft from scratching the oil seal, prevent the oil seal from being scratched and affecting the sealing performance of the oil seal, thereby effectively improving the reliability and stability of the oil seal.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] In a first aspect, the present application provides a differential structure for connecting to a half-axle of a vehicle, comprising a differential housing, a half-axle gear and an oil seal;

[0008] A first mounting hole is provided on the differential housing, one end of the side gear is located in the differential housing, and the other end of the side gear passes through the first mounting hole and extends out of the differential housing;

[0009] The side shaft gear is provided with a second mounting hole extending in the axial direction, wherein the second mounting hole is used for the side shaft to extend into and to match with the side shaft, so that the side shaft gear is connected to the side shaft;

[0010] The oil seal is sleeved on one end of the half-shaft gear extending out of the differential housing.

[0011] The embodiment of the present application extends the oil seal outside the differential housing and sleeves the oil seal on the outer periphery of the half-shaft gear. In this way, when the half-shaft extends into the second mounting hole and is connected to the half-shaft gear, contact between the half-shaft and the oil seal can be avoided, which can effectively reduce or avoid scratches on the oil seal by the half-shaft, prevent the oil seal from being scratched and affecting the sealing performance of the oil seal, thereby effectively improving the reliability and stability of the oil seal.

[0012] In a possible implementation, the side gear includes a gear portion and a connecting shaft connected to each other;

[0013] The connecting shaft has a first end and a second end opposite to each other, the gear portion is located at the first end of the connecting shaft, and the second end passes through the first mounting hole and extends out of the differential housing;

[0014] The oil seal is sleeved on the second end of the connecting shaft, and the second mounting hole penetrates from the first end of the connecting shaft to the second end.

[0015] In a possible implementation, a sealing end cover is further included, wherein the sealing end cover is located at the first end of the connecting shaft, and the sealing end cover is plugged into the second mounting hole.

[0016] In a possible implementation, a sealing ring is further included, and a groove is formed on the inner wall of the second mounting hole;

[0017] The sealing ring is located in the groove, and the sealing ring is used for providing sealing between the half-shaft gear and the half-shaft.

[0018] In a possible implementation, the length of the side gear extending out of the differential housing is 15 mm to 25 mm.

[0019] In a possible implementation, a spring member is further included, and a first slot is formed on the inner wall of the second mounting hole, and the first slot is aligned with the second slot on the half shaft;

[0020] The outer ring of the clamping spring is clamped in the first clamping groove, and the inner ring of the clamping spring is clamped in the second clamping groove on the half shaft.

[0021] In a possible implementation, the number of the half-shaft gears is two, and the two half-shaft gears are respectively used to be connected to the two half-shafts in the vehicle.

[0022] In one possible implementation, the inner wall of the second mounting hole also has internal spline teeth, and the internal spline teeth are used to cooperate with the spline teeth on the outer periphery of the half shaft, so that the half shaft and the half shaft gear are connected through the cooperation between the spline teeth and the internal spline teeth.

[0023] In a possible implementation, a first limit platform is further provided in the second mounting hole, and the first limit platform is used to cooperate with the second limit platform on the half shaft;

[0024] The first limiting platform is in contact with the second limiting platform.

[0025] A second aspect of the present application provides a vehicle, comprising a half shaft and any of the above-mentioned differential structures;

[0026] The half shaft is connected to the half shaft gear in the differential structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 A schematic structural diagram of a differential structure without an oil seal provided in an embodiment of the present application;

[0029] Figure 2 A schematic structural diagram of a differential structure with an oil seal installed provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a half-shaft and a differential provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of a half-shaft gear provided in an embodiment of the present application;

[0032] Figure 5 A cross-sectional view of a differential structure with an oil seal installed provided in an embodiment of the present application;

[0033] Figure 6 A cross-sectional view of a differential structure without an oil seal installed provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 100- Differential structure;

[0036] 110-differential housing; 111-first mounting hole; 112-oil return groove;

[0037] 120, 120a, 120b- side shaft gears; 121- second mounting hole; 122- gear portion;

[0038] 123-connecting shaft; 1231-first end; 1232-second end; 124-groove;

[0039] 125-first slot; 126-internal spline teeth; 127-first limit platform;

[0040] 130- oil seal; 131- gap;

[0041] 140-sealing end cover;

[0042] 150-seal ring;

[0043] 160-circlip member;

[0044] 200-half shaft. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0046] The embodiment of the present application provides a differential structure and a vehicle including the differential structure, wherein the vehicle may be a car, a bus, or a truck. For example, the vehicle may be any one of an electric vehicle / electric vehicle (EV), a pure electric vehicle / battery electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle, and a fuel vehicle.

[0047] As described in the above background technology, the differential generally includes a differential housing, axle gears and an oil seal. A mounting hole is provided on the housing, and the oil seal is located outside the housing and surrounds the outer periphery of the mounting hole. The axle gears are located inside the housing, and the axle shafts pass through the oil seal and the mounting hole in sequence and extend into the housing to be connected to the axle gears through spline teeth.

[0048] However, in the above mechanism, when the half shaft passes through the oil seal and the mounting hole and cooperates with the half shaft gear, the spline teeth are likely to scratch the oil seal, thereby affecting the sealing performance of the oil seal.

[0049] Based on the above problems, an embodiment of the present application provides a differential structure, in which the oil seal is extended from the outside of the differential housing and the oil seal is sleeved on the outer periphery of the half-shaft gear. In this way, when the half-shaft extends into the second mounting hole and is connected with the half-shaft gear, the half-shaft and the oil seal can be prevented from contacting each other, which can effectively reduce or prevent the half-shaft from scratching the oil seal and prevent the oil seal from being scratched and affecting the sealing performance of the oil seal, thereby effectively improving the reliability and stability of the oil seal.

[0050] A differential structure provided in an embodiment of the present application is described in detail below in conjunction with the accompanying drawings.

[0051] Figure 1 A schematic diagram of a differential structure without an oil seal provided in an embodiment of the present application. Figure 2 A schematic structural diagram of a differential structure with an oil seal installed provided in an embodiment of the present application, Figure 3 A schematic diagram of the structure of the cooperation between a half-shaft and a differential provided in an embodiment of the present application.

[0052] The present application embodiment provides a differential structure 100, which can be connected to a half shaft 200 of a vehicle. Figure 1 and Figure 2 As shown, the differential structure 100 may include a differential housing 110, a side gear 120 and an oil seal 130. The differential housing 110 may include a first mounting hole 111, one end of the side gear 120 may be located in the differential housing 110, and the other end may pass through the first mounting hole 111 of the differential housing 110 and extend out of the differential housing 110.

[0053] For example, the side gear 120 and the first mounting hole 111 may cooperate with each other, so that the side gear 120 may be connected to the differential housing 110 through the first mounting hole 111 .

[0054] A second mounting hole 121 extending in the axial direction may be provided on the side gear 120. Figure 3 As shown, the second mounting hole 121 can be used for the half shaft 200 to extend into and cooperate with the half shaft 200, so that the half shaft gear 120 can be connected to the half shaft 200 through the second mounting hole 121. Among them, the oil seal 130 can be sleeved on one end of the half shaft gear 120 extending out of the differential housing 110.

[0055] By extending the oil seal 130 out of the differential case 110 and sleeved on the outer periphery of the half-shaft gear 120, the half-shaft 200 can avoid contact with the oil seal 130 during the process of extending the half-shaft 200 into the second mounting hole 121 and connecting with the half-shaft gear 120, which can effectively reduce or avoid scratches on the oil seal 130 by the half-shaft 200, prevent the oil seal 130 from being scratched and affect the sealing performance of the oil seal 130, thereby effectively improving the reliability and stability of the oil seal 130.

[0056] Figure 4 A schematic diagram of the structure of a half-axle gear provided in an embodiment of the present application.

[0057] See also Figure 4 As shown, the side gear 120 may include a connected gear portion 122 and a connecting shaft 123, the connecting shaft 123 may have a first end 1231 and a second end 1232 opposite to each other, the gear portion 122 may be located at the first end 1231 of the connecting shaft 123, and the second end 1232 may pass through the first mounting hole 111 and extend out of the differential. The oil seal 130 may be sleeved on the second end 1232 of the connecting shaft 123, and the second mounting hole 121 may pass through from the first end 1231 of the connecting shaft 123 to the second end 1232.

[0058] The half shaft 200 can be extended into the second mounting hole 121 through the second end 1232 of the connecting shaft 123 to achieve connection with the half shaft gear 120. The second end 1232 of the connecting shaft 123 can provide a mounting platform for the oil seal 130, so that the oil seal 130 can be fixed on the differential, which helps to improve the stability and reliability of the installation of the oil seal 130. Moreover, the second end 1232 can also isolate the half shaft 200 from the oil seal 130 to reduce or avoid scratching the oil seal 130 by the half shaft 200 during the installation process, thereby effectively improving the sealing stability of the oil seal 130.

[0059] Continue to see Figure 4 As shown, the differential structure 100 may further include a sealing end cover 140, which may be located at the first end 1231 of the connecting shaft 123, and the sealing end cover 140 may be plugged in the second mounting hole 121. The sealing end cover 140 may seal the second mounting hole 121 to prevent the lubricating oil in the differential housing 110 from flowing out of the differential housing 110 through the second mounting hole 121, and prevent the lubricating oil from leaking out and affecting the overall lubrication performance of the differential, thereby effectively improving the reliability and stability of the differential lubrication.

[0060] Continue to see Figure 3As shown, the differential structure 100 may further include a sealing ring 150. A groove 124 may be provided on the inner wall of the second mounting hole 121. The sealing ring 150 may be located in the groove 124. The sealing ring 150 may be used to provide a seal between the side gear 120 and the side shaft 200. In this way, the sealing performance between the side gear 120 and the side shaft 200 may be further improved, and the lubricating oil inside the differential may be effectively prevented from flowing out from the gap between the side gear 120 and the side shaft 200, thereby effectively improving the overall lubrication performance of the differential structure 100.

[0061] Continue to see Figure 3 As shown, the differential structure 100 may further include a spring clip 160, a first slot 125 may be provided on the inner wall of the second mounting hole 121, the first slot 125 may be aligned with the second slot on the outer periphery of the half shaft 200, the outer ring of the spring clip 160 may be clamped in the first slot 125, and the outer ring of the spring clip 160 may be clamped in the second slot. The spring clip 160 may limit the axial position of the half shaft 200 in the half shaft gear 120, and may prevent the half shaft 200 from moving in the axial direction of the half shaft gear 120, which helps to improve the reliability and stability of the connection between the half shaft 200 and the half shaft gear 120, and improve the overall structural stability of the differential structure 100.

[0062] Continue to see Figure 3 As shown, a first stop 127 may be provided in the second mounting hole 121, and the first stop 127 may cooperate with the second stop on the outer periphery of the half shaft 200, and the first stop 127 and the second stop may abut against each other. The cooperation between the first stop 127 and the second stop can provide positioning for the installation of the half shaft 200, can reduce or avoid the axial deviation of the half shaft 200 in the half shaft gear 120, and help improve the assembly accuracy between the half shaft 200 and the half shaft gear 120.

[0063] Figure 5 A cross-sectional view of a differential structure with an oil seal installed provided in an embodiment of the present application.

[0064] Among them, see Figure 5As shown, the number of the half-axle gears 120 can be two, for example, the two half-axle gears 120 can be respectively a half-axle gear 120a and a half-axle gear 120b, and the two half-axle gears 120 can be respectively used to connect with two half-axles 200 in the vehicle. The two half-axle gears 120 can rotate independently, so that the two half-axles 200 rotate independently of each other. In this way, when the vehicle is turning, the two half-axles 200 can rotate at different speeds. For example, the half-axle 200 located in the outer circle can rotate at a higher speed, and the half-axle 200 located in the inner circle can rotate at a lower speed, which can effectively prevent the vehicle from rolling over, etc., and can make the vehicle run more smoothly when turning, thereby effectively improving the safety of the vehicle when turning.

[0065] Continue to see Figure 5 As shown, the inner wall of the second mounting hole 121 may also have internal spline teeth 126, and the internal spline teeth 126 may be used to cooperate with the spline teeth on the outer periphery of the half shaft 200, so that the half shaft 200 and the half shaft gear 120 can be connected through the cooperation between the spline teeth and the internal spline teeth 126. The spline connection has a large bearing capacity and good guiding performance, which can improve the coaxiality of the connection between the half shaft gear 120 and the half shaft 200 and improve the torque transmission efficiency between the half shaft gear 120 and the half shaft 200.

[0066] Moreover, the spline groove can also improve the uniformity of torque transmission between the half-shaft gear 120 and the half-shaft 200, and can effectively reduce or avoid slippage between the half-shaft 200 and the half-shaft gear 120, thereby effectively improving the stability of power transmission between the half-shaft gear 120 and the half-shaft 200.

[0067] In the embodiments of this application, see Figure 5 As shown, an oil return groove 112 may be provided on the inner wall of the first mounting hole 111 of the differential housing 110, and the cavity of the differential housing 110 may be connected to the cavity of the reducer through the oil return groove 112. For example, the oil return groove 112 may be spiral, and one end of the oil return groove 112 may be connected to the cavity of the differential housing 110, and the other end may be connected to the cavity of the reducer. In this way, the lubricating oil in the differential structure 100 may flow into the cavity of the reducer through the oil return groove 112, which may improve the uniformity of the lubricating oil setting between the differential structure 100 and the reducer, and improve the overall lubrication effect of the reducer and the differential structure 100.

[0068] For example, see Figure 5 As shown, there may be a gap 131 between the oil seal 130 and the differential housing 110 , so that the oil seal 130 can avoid blocking the oil return groove 112 , so that the lubricating oil flowing out of the oil return groove 112 can flow into the cavity of the reducer through the gap 131 .

[0069] Figure 6 A cross-sectional view of a differential structure without an oil seal installed provided in an embodiment of the present application.

[0070] See also Figure 6 As shown, the length of the side gear 120 extending out of the differential case 110 may be L1, and the value of L1 may be 15 mm to 25 mm. This can facilitate the installation of the oil seal 130, reduce or prevent the oil seal 130 from falling off the side gear 120, and help improve the reliability and stability of the oil seal 130 on the side gear 120.

[0071] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more groups.

[0072] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0073] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0074] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0075] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0076] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A differential structure, used to be connected to a half shaft of a vehicle, characterized in that: Includes differential housing, axle gears and oil seals; A first mounting hole is provided on the differential housing, one end of the side gear is located in the differential housing, and the other end of the side gear passes through the first mounting hole and extends out of the differential housing; The side shaft gear is provided with a second mounting hole extending in the axial direction, wherein the second mounting hole is used for the side shaft to extend into and to match with the side shaft, so that the side shaft gear is connected to the side shaft; The oil seal is sleeved on one end of the half-shaft gear extending out of the differential housing.

2. The differential structure according to claim 1, characterized in that: The side gear comprises a gear portion and a connecting shaft connected to each other; The connecting shaft has a first end and a second end opposite to each other, the gear portion is located at the first end of the connecting shaft, and the second end passes through the first mounting hole and extends out of the differential housing; The oil seal is sleeved on the second end of the connecting shaft, and the second mounting hole penetrates from the first end of the connecting shaft to the second end.

3. The differential structure according to claim 2, characterized in that: It also includes a sealing end cover, which is located at the first end of the connecting shaft and is plugged into the second mounting hole.

4. The differential structure according to any one of claims 1 to 3, characterized in that: It also includes a sealing ring, and the inner wall of the second mounting hole is provided with a groove; The sealing ring is located in the groove, and the sealing ring is used for providing sealing between the half-shaft gear and the half-shaft.

5. The differential structure according to any one of claims 1 to 3, characterized in that: The length of the side gear extending out of the differential housing is 15 mm to 25 mm.

6. The differential structure according to any one of claims 1 to 3, characterized in that: It also includes a spring clip, and a first slot is formed on the inner wall of the second mounting hole, and the first slot is aligned with the second slot on the half shaft; The outer ring of the clamping spring is clamped in the first clamping groove, and the inner ring of the clamping spring is clamped in the second clamping groove on the half shaft.

7. The differential structure according to any one of claims 1 to 3, characterized in that: The number of the side shaft gears is two, and the two side shaft gears are respectively used to be connected to the two side shafts in the vehicle.

8. The differential structure according to any one of claims 1 to 3, characterized in that: The inner wall of the second mounting hole also has internal spline teeth; The internal spline teeth are used to cooperate with the spline teeth on the outer periphery of the half shaft, so that the half shaft and the half shaft gear are connected through the cooperation between the spline teeth and the internal spline teeth.

9. The differential structure according to any one of claims 1 to 3, characterized in that: The second mounting hole is also provided with a first limit platform, and the first limit platform is used to cooperate with the second limit platform on the half shaft; The first limiting platform is in contact with the second limiting platform.

10. A vehicle, characterized in that: A differential structure comprising a half shaft and any one of claims 1 to 9; The half shaft is connected to the half shaft gear in the differential structure.

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