Differential structure and vehicle

Abstract

The utility model discloses a differential mechanism structure and a vehicle. According to the differential mechanism structure, an outer transmission gear is connected to a differential shell, a mounting cavity is formed in the inner side of the differential shell, a friction plate is arranged in the center area of the mounting cavity, transmission assemblies are arranged at the positions, located at the two ends of the friction plate, of the mounting cavity, and the transmission assemblies are connected with cup connecting assemblies and comprise large transmission gears and a plurality of small transmission gears; the friction plate is coaxial with the transmission large tooth through the positioning pin, and the transmission small tooth is in meshing transmission with the transmission large tooth. By combining the mechanical property of the spiral gear and the dynamic adjusting mechanism of the friction plate, a certain axial force can be generated in the torque transmission process, and the axial force is used for adjusting torque distribution, so that the initial distribution of the torque is realized; the differential mechanism further has the mechanical torque distribution characteristic, intelligent torque distribution can be achieved without depending on an electronic control system, the complexity and cost of the system are reduced, and the reliability and durability of the differential mechanism are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a differential structure and vehicle. BACKGROUND

[0002] In the vehicle transmission system, the differential plays a crucial role, it is responsible for when the vehicle turns, allows two sides wheel to rotate at different speeds, thereby ensuring that the vehicle can smoothly along the curve driving. The traditional differential design often relies on complex mechanical structure to realize this function, but in the torque distribution, often there is limitation, especially when facing complex and changeable driving conditions, its adaptability and flexibility are insufficient.

[0003] The early differential design mostly adopts simple planetary gear mechanism, although can effectively realize the speed difference of two sides wheel, but in the torque distribution is more fixed, cannot carry out dynamic adjustment according to road condition or driving demand. This fixed torque distribution mode, when the vehicle is running on uneven road or carries out urgent acceleration, urgent turning etc. operation, can cause one side wheel to excessively skid, and the other side wheel is lost grip because of the insufficient torque, influence vehicle's control stability and driving safety.

[0004] In order to overcome this defect, the industry begins to explore more advanced differential technology, aims at realizing more intelligent, flexible torque distribution. However, many attempts rely on electronic control system to monitor wheel speed, traction and other parameters, and through solenoid valve, motor and other electronic elements real-time adjustment torque distribution, although improve performance to some extent, but also increase the complexity and cost of system, and rely on the reliability of electronic components. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the insufficient of prior art, provide a differential structure and vehicle.

[0006] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0007] Firstly, the utility model embodiment provides a differential structure, comprising: outer transmission tooth and differential shell, the outer transmission tooth is connected to the differential shell, the differential shell inside is equipped with installation cavity, the center area of installation cavity is equipped with friction plate, the installation cavity is located at both ends of the friction plate and is equipped with transmission assembly, the transmission assembly is connected with cup assembly, the transmission assembly includes transmission big tooth and a plurality of transmission small teeth, the friction plate is coaxial with the transmission big tooth through the positioning pin, the transmission small tooth is engaged transmission in the transmission big tooth.

[0008] In an embodiment, the cup assembly comprises a cup member and a ball bearing, the ball bearing is sleeved on the cup member, and the cup member extends into the differential case and is connected to the driving gear.

[0009] In an embodiment, the cup member is connected to the driving gear through a fixing pin.

[0010] In an embodiment, the number of the driving pinions is four, and the driving pinions are evenly distributed in the mounting cavity.

[0011] In an embodiment, the differential case is provided with a clamping protrusion on the outer periphery, and the outer driving gear is provided with an annular groove corresponding to the clamping protrusion.

[0012] In an embodiment, the outer driving gear is fixed to the differential case through a screw.

[0013] In an embodiment, a sealing sheet is further arranged between the screw and the differential case.

[0014] In an embodiment, a leak-proof gasket is further arranged between the driving gear and the cup member, and the leak-proof gasket is sleeved on the cup member.

[0015] In an embodiment, the leak-proof gasket is further provided with a sealing ring on the outer side, and the sealing ring is sleeved on the cup member.

[0016] The differential structure has the beneficial effects compared with the prior art: the mechanical properties of the helical gear and the dynamic adjustment mechanism of the friction plate are combined ingeniously, so that a certain axial force can be generated in the torque transmission process, and the axial force is ingeniously utilized to adjust the torque distribution. When the differential works, the mechanical properties of the helical gear enable the driving assembly to automatically adjust the meshing state according to the load conditions of the two sides of the wheel, thereby realizing the preliminary distribution of the torque. Secondly, the introduction of the friction plate further enhances the dynamic adjustment capability of the torque distribution. The friction plate is coaxial with the driving gear through a positioning pin, so that it can be slightly displaced when subjected to an axial force, and then the torque distribution is fine-tuned through the change of the friction force. This design not only improves the accuracy of the torque distribution, but also enables the differential to respond and adjust the torque distribution more quickly when facing complex and variable driving conditions, thereby ensuring that the vehicle can maintain the best control stability and driving safety under different road conditions. In addition, the differential structure also has the characteristics of mechanical torque distribution, and the intelligent distribution of the torque can be realized without relying on the electronic control system. This feature not only reduces the complexity and cost of the system, but also improves the reliability and durability of the differential, and avoids the performance degradation or failure caused by the failure of electronic components.

[0017] In a second aspect, the utility model discloses a vehicle comprising the differential structure as described above.

[0018] The utility model discloses a vehicle, compared with prior art has the beneficial effects: through setting up differential structure in the vehicle, then through the mechanical characteristic of spiral gear and the dynamic adjustment mechanism of friction disc of ingenious combination, make in the torque transmission process can produce certain axial force, this axial force is ingeniously utilized to adjust torque distribution, when the differential works, the mechanical characteristic of spiral gear makes that transmission assembly can automatically adjust the meshing state according to the load condition of both sides wheel, thereby realizes the preliminary distribution of torque, second, the introduction of friction disc further enhanced the dynamic adjustment ability of torque distribution, and the friction disc is coaxial with transmission gear through the positioning pin, make it when the axial force is acted upon can take place slight displacement, and then realize the fine adjustment of torque distribution through the change of friction, this design not only improves the accuracy of torque distribution, also makes the differential when facing the complex and changeable driving condition, can respond more quickly and adjust torque distribution, ensure that the vehicle can keep the best control stability and driving safety under different road conditions, in addition, the differential structure still has the obvious mechanical torque distribution characteristics, need not rely on electronic control system to realize the intelligent distribution of torque, this characteristic not only reduces the complexity and cost of system, also improves the reliability and durability of differential, avoids the performance decline or failure problem due to electronic component failure.

[0019] The utility model will be further described below in connection with the drawings and specific embodiments. DRAWINGS

[0020] In order to make the technical scheme in the utility model embodiment more clearly, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor intensity.

[0021] Fig. 1 The utility model provides the differential structure's three-dimensional schematic view of providing for the utility model;

[0022] Fig. 2 The utility model provides the differential structure's section view schematic view of providing for the utility model;

[0023] Fig. 3 The utility model provides the differential structure's exploded schematic view of providing for the utility model. DETAILED DESCRIPTION

[0024] In order to make the technical scheme in the utility model embodiment more clearly, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor intensity.

[0025] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0028] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include the first and second features directly contact, or can include the first and second features are not directly contact but through the other features between them contact.

[0030] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0031] Referring to Figs. 1 to 3 The utility model discloses a differential structure, including: outer transmission tooth 10 and differential case 20, outer transmission tooth 10 is connected in differential case 20, the inside of differential case 20 is equipped with installation cavity, the central region of installation cavity is equipped with friction plate 30, the both ends of installation cavity are equipped with transmission assembly 40 in friction plate 30, transmission assembly 40 is connected with cup assembly 50, transmission assembly 40 includes transmission big tooth 41 and a plurality of transmission pinion 42, friction plate 30 is coaxial with transmission big tooth 41 through positioning pin 60, transmission pinion 42 is engaged transmission in transmission big tooth 41.

[0032] Specifically, the outer transmission gear 10 receives external power to drive the differential case 20, and then transmits to the transmission large gear 41 and the transmission small gear 42, and then presses the friction plate 30, and finally transmits to the left and right half shafts. Among them, the transmission large gear 41 and the transmission small gear 42 are both spiral gears. That is, by skillfully combining the mechanical properties of the spiral gears and the dynamic adjustment mechanism of the friction plate 30, a certain axial force can be generated during torque transmission. This axial force is skillfully used to adjust the torque distribution. When the differential works, the mechanical properties of the spiral gears enable the transmission assembly 40 to automatically adjust the meshing state according to the load conditions of the two sides of the wheel, thereby realizing the preliminary distribution of torque. Secondly, the introduction of the friction plate 30 further enhances the dynamic adjustment capability of the torque distribution. The friction plate 30 is coaxial with the transmission large gear 41 through the positioning pin 60, so that it can be slightly displaced when subjected to an axial force, and then the torque distribution is fine-tuned through the change of friction. This design not only improves the accuracy of torque distribution, but also enables the differential to respond more quickly and adjust the torque distribution when faced with complex and variable driving conditions, ensuring that the vehicle can maintain the best handling stability and driving safety under different road conditions. In addition, the differential structure also has the characteristics of mechanical torque distribution, which can realize intelligent distribution of torque without relying on electronic control systems. This feature not only reduces the complexity and cost of the system, but also improves the reliability and durability of the differential, avoiding performance degradation or failure problems caused by electronic component failures.

[0033] In an embodiment, the joint cup assembly 50 includes a joint cup piece 51 and a ball bearing 52, the ball bearing 52 is sleeved on the joint cup piece 51, and the joint cup piece 51 extends into the differential case 20 and is connected to the transmission large gear 41.

[0034] Specifically, the ball bearing 52 not only reduces the friction of the joint cup piece 51 during rotation, but also supports the differential case 20 and the power output input link. It ensures the accuracy of power transmission and reduces power loss caused by friction and wear. In addition, through the support of the ball bearing 52, the differential can maintain stability in the axial and radial directions, preventing vibration and noise caused by deviation, and improving the overall performance and reliability of the differential.

[0035] That is, the introduction of the ball bearing 52 significantly reduces rotational friction, enabling more efficient torque transmission and improving the power transmission efficiency of the differential. In addition, the ball bearing 52 not only supports the link between the differential case 20 and the power output input, but also improves system stability by reducing friction and wear, reducing the risk of failure due to vibration and noise. In addition, the precise rolling and supporting action of the ball bearing 52 ensures the accuracy of power transmission, reduces errors due to deviation, and improves the performance of the differential. In addition, the ball bearing 52 can withstand large radial and axial loads, reducing wear between the cup joint 51 and the differential case 20 and extending the service life of the components. In addition, the secure connection between the cup joint 51 and the drive gear 41 ensures the stability and reliability of torque transmission, avoiding performance degradation or failure due to loose connections.

[0036] In an embodiment, the cup joint 51 is connected to the drive gear 41 by a fixed pin 70.

[0037] Specifically, the fixed pin 70, as a mechanical connection method, can provide high connection strength, ensuring that torque is not lost during transmission due to loose connections. Compared with welding or bolt connection, the connection method of the fixed pin 70 is simpler and faster, without the need for complex welding equipment or bolt tightening tools, reducing installation costs and time. In addition, the fixed pin 70 connection has high reliability and is not easily affected by vibration or impact, ensuring stable operation of the differential under harsh working conditions. In addition, if it is necessary to replace or repair components in the differential, the fixed pin 70 connection is easy to disassemble and reassemble, reducing maintenance difficulty and cost.

[0038] In an embodiment, the number of drive pinions 42 is four, and they are evenly distributed in the mounting cavity.

[0039] Specifically, the four driving pinions 42 and the driving rack 41 combine to form a helical gear set for transmitting input torque to the left and right half shafts, and also generate an axial force through gear meshing angle to drive the friction plate 30 to be pressed. More specifically, the number of driving pinions 42 is set to four, which are evenly distributed in the mounting cavity in the differential housing 20. This distribution ensures that the torque can be evenly distributed to the left and right half shafts, thereby improving the stability and reliability of the differential. The four driving pinions 42 and the driving rack 41 together form a helical gear set. In this gear set, the driving rack 41 acts as the driving gear, while the four driving pinions 42 act as the driven gears. The unique feature of the helical gear set is its tooth shape design, i.e. the tooth surface of the gear is helical. This design allows a certain axial force to be generated during gear meshing. When the driving rack 41 rotates, it will drive the four driving pinions 42 to rotate synchronously through the meshing relationship. Due to the tooth shape design of the helical gear set, this rotation will generate an inward axial force. This axial force is ingeniously utilized to drive the friction plate 30 to be pressed. In the differential housing 20, the friction plate 30 is designed as a movable component, which can generate friction force with the driving assembly 40 (especially the driving rack 41) through the action of the axial force. When the axial force acts, the friction plate 30 will be pressed on the driving rack 41, thereby forming a tight friction pair. This friction pair can further transmit torque and play a role in adjusting torque distribution.

[0040] That is, the even distribution of the four driving pinions 42 ensures that the torque can be evenly distributed to the left and right half shafts, thereby improving the efficiency of torque transmission. In addition, the design of the helical gear set allows a stable axial force to be generated during torque transmission, which is used to drive the friction plate 30 to be pressed, thereby enhancing the overall stability of the differential. In addition, through the friction force adjustment between the friction plate 30 and the driving assembly 40, the differential can automatically adjust the torque distribution according to the load conditions of the left and right wheels, realizing intelligent distribution of torque. In addition, the meshing mode of the helical gear set reduces the impact and wear between gears, prolonging the service life of the differential. At the same time, the pressing action of the friction plate 30 also reduces the heat and wear caused by friction, further improving the durability of the differential.

[0041] Among them, the axial force of the helical gear extrudes the friction plate 30 to generate a friction torque to limit the speed difference, and the pressure of the friction plate 30 is proportional to the input torque, realizing self-adaptive locking.

[0042] Specifically, when there is a speed difference between the two shafts, the friction torque on the friction plate 30 will try to eliminate this difference. The size of the friction torque is proportional to the input torque, so when the input torque increases, the friction torque also increases, thereby more effectively limiting the speed difference. In extreme cases, when the friction torque is large enough, it can achieve the function of adaptive locking, that is, there is almost no relative rotation between the two shafts. This locking function is very useful in situations where precise control of the speed difference is required. That is, by using the axial force of the helical gear to press the friction plate 30 to generate friction torque, the speed difference between the two shafts can be precisely controlled, which is very important for mechanical systems that require precise synchronization or coordinated motion. In addition, in the case of an increase in input torque, the friction torque also increases, thereby achieving the function of adaptive locking, which helps to prevent system overload or damage and improves the stability and safety of the system. In addition, by optimizing the material and design of the friction plate 30, friction loss can be reduced and transmission efficiency can be improved, which is very important for mechanical systems that require efficient transmission. In addition, the use of the axial force of the helical gear to generate friction torque and limit the speed difference can simplify the structural design of the transmission system.

[0043] In an embodiment, the differential housing 20 has a clamping protrusion extending around its outer periphery, and the outer transmission gear 10 is provided with an annular groove corresponding to the clamping protrusion.

[0044] Specifically, the clamping protrusion and the annular groove can provide additional connection strength, ensuring a stable connection between the differential housing 20 and the outer transmission gear 10, which helps to reduce vibration and noise caused by loose connections and improves the overall performance of the differential. In addition, the use of the clamping protrusion and the annular groove makes it easier to disassemble the differential housing 20 and the outer transmission gear 10, which helps to quickly maintain or replace parts when needed and extends the service life of the differential.

[0045] In an embodiment, the outer transmission gear 10 is fixed to the differential housing 20 by screws 80.

[0046] Specifically, the outer transmission gear 10 is fixed to the differential housing 20 by four screws 80, which can provide sufficient connection strength to ensure that the differential does not loosen or fall off during operation. In addition, the four screws 80 are evenly distributed between the outer transmission gear 10 and the differential housing 20, which can provide uniform support force and enhance the overall stability of the differential, which helps to reduce the risk of failure caused by vibration or impact. In addition, the screw 80 has strong adaptability and can adapt to different specifications and sizes of the outer transmission gear 10 and the differential housing 20, which makes the design of the differential more flexible and diverse, and can meet the needs of different vehicle models and working conditions.

[0047] In an embodiment, a sealing sheet 90 is further arranged between the screw 80 and the differential case 20.

[0048] Specifically, by adding the sealing sheet 90 between the screw 80 and the differential case 20, the leakage of oil or other working medium from the screw hole can be effectively prevented, which helps to keep the working medium inside the differential clean and stable, improves the reliability and service life of the differential. In addition, good sealing can reduce the failure rate and maintenance frequency of the differential due to leakage, which helps to reduce maintenance cost and time, improve the economy and availability of the differential.

[0049] In an embodiment, a leak-proof gasket 100 is further arranged between the transmission cog 41 and the cup member 51, and the leak-proof gasket 100 is sleeved on the cup member 51.

[0050] Specifically, by adding the leak-proof gasket 100 and sleeving it on the cup member 51, the leakage of oil or other working medium from the connection between the transmission cog 41 and the cup member 51 can be effectively prevented, which helps to keep the working medium inside the differential clean and stable, improves the reliability and service life of the differential. In addition, selecting appropriate materials for the leak-proof gasket 100 can enhance the resistance of the differential to corrosive media. For example, using rubber or plastic leak-proof gasket 100 can resist the corrosion of oil, prolonging the service life of the differential. In addition, good sealing can reduce the failure rate and maintenance frequency of the differential due to leakage, which helps to reduce maintenance cost and time, improve the economy and availability of the differential.

[0051] In an embodiment, a sealing ring 110 is further arranged on the outer side of the leak-proof gasket 100, and the sealing ring 110 is sleeved on the cup member 51.

[0052] Specifically, by adding the sealing ring 110 on the outer side of the leak-proof gasket 100, the sealing between the transmission cog 41 and the cup member 51 can be further enhanced, and this double sealing structure can effectively prevent the leakage of oil or other working medium from the connection, improving the reliability and service life of the differential. In addition, since the sealing ring 110 and the leak-proof gasket 100 jointly play a sealing role, the risk of leakage can be greatly reduced, which helps to keep the working medium inside the differential clean and stable, and reduces the failure and maintenance cost due to leakage.

[0053] In an embodiment, the differential case 20 is composed of a shell 21 and a cover 22, and the cover 22 is connected to the shell 21 away from the outer transmission cog 10 by the screw 80.

[0054] Specifically, through the close fit of the cover 22 and the shell 21 and the fastening effect of the screw 80, the leakage of oil or other working medium from the open end of the differential housing 20 can be effectively prevented, which helps to keep the working medium inside the differential clean and stable, and improves the reliability and service life of the differential. In addition, the cover 22 is connected to the shell 21 by the screw 80, which can further enhance the overall structural strength of the differential housing 20, which helps to resist various forces and torques generated during the operation of the differential, ensuring the stability and safety of the differential.

[0055] The utility model discloses still a kind of vehicle, including the differential structure as described above.

[0056] Specifically, by setting the differential structure in the vehicle, and then by ingeniously combining the mechanical properties of the helical gear with the dynamic adjustment mechanism of the friction plate 30, a certain axial force can be generated during torque transmission. This axial force is ingeniously used to adjust the torque distribution. When the differential is working, the mechanical properties of the helical gear enable the transmission assembly 40 to automatically adjust the engagement state according to the load conditions of the two sides of the wheel, thereby achieving the preliminary distribution of torque. Secondly, the introduction of the friction plate 30 further enhances the dynamic adjustment capability of torque distribution. The friction plate 30 is coaxial with the transmission gear 41 through the positioning pin 60, so that it can be slightly displaced when subjected to axial force, and then the torque distribution is fine-tuned through the change of friction force. This design not only improves the accuracy of torque distribution, but also enables the differential to respond and adjust the torque distribution more quickly when facing complex and variable driving conditions, ensuring that the vehicle can maintain optimal control stability and driving safety under different road conditions. In addition, the differential structure also has the characteristics of mechanical torque distribution, which can realize intelligent distribution of torque without relying on electronic control systems. This feature not only reduces the complexity and cost of the system, but also improves the reliability and durability of the differential, avoiding performance degradation or failure due to electronic component failure.

[0057] More specifically, the vehicle generally refers to an RC model car, i.e. the differential structure is applied to an RC model car.

[0058] The above embodiments are the preferred implementation scheme of the utility model, in addition to this, the utility model can be realized in other ways, without departing from the technical scheme concept, any obvious substitution is within the protection scope of the utility model.

Claims

1. A differential structure, characterized by, The differential structure comprises an outer transmission gear and a differential case, the outer transmission gear is connected to the differential case, the differential case is internally provided with a mounting cavity, a friction plate is arranged in the central area of the mounting cavity, transmission assemblies are arranged at both ends of the friction plate, the transmission assemblies are connected to joint cup assemblies, the transmission assemblies comprise a transmission large gear and a plurality of transmission small gears, the friction plate is coaxial to the transmission large gear through a positioning pin, and the transmission small gears are in meshing transmission with the transmission large gear. The joint cup assembly comprises a joint cup member and a ball bearing, the ball bearing is sleeved on the joint cup member, and the joint cup member extends into the differential case and is connected to the transmission large gear.

2. The differential structure of claim 1, wherein, The joint cup member is connected to the transmission large gear through a fixing pin.

3. The differential structure of claim 2, wherein, The number of the transmission small gears is four, and the transmission small gears are uniformly distributed in the mounting cavity.

4. The differential structure of claim 1, wherein, The differential case is externally provided with a clamping protrusion, and the outer transmission gear is provided with an annular groove corresponding to the clamping protrusion.

5. The differential structure of claim 1, wherein, The outer transmission gear is fixed to the differential case through a screw.

6. The differential structure of claim 5, wherein, A sealing plate is further arranged between the screw and the differential case.

7. The differential structure of claim 6, wherein, A leak-proof gasket is further arranged between the transmission large gear and the joint cup member, and the leak-proof gasket is sleeved on the joint cup member.

8. The differential structure of claim 2, wherein, An outer side of the leak-proof gasket is further provided with a sealing ring, and the sealing ring is sleeved on the joint cup member.

9. The differential structure of claim 8, wherein, The differential structure comprises the differential structure according to any one of claims 1-9.

10. A vehicle characterized by comprising: ​

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