Differential device, axle and vehicle

Abstract

The utility model relates to the technical field of mechanical transmission, and discloses a differential device, an axle and a vehicle, and the differential device comprises a first planet row and a second planet row; the first output end of the first planet row is connected with the second planet row; the second planet row comprises a second sun gear, a plurality of second planet gears, a plurality of third planet gears and a second gear ring; the second sun gear, the plurality of second planet gears, the plurality of third planet gears and the second gear ring are in transmission connection in sequence; the plurality of second planet gears and the plurality of third planet gears are respectively connected with a third output end of the second planet row, and the third output end is connected with the other wheel. Differential speed and speed reduction are conducted through the first planet row and the second planet row, the structure is simple, the technical problems that in the prior art, a differential mechanism is complex, and consequently the differential mechanism is prone to damage and inconvenient to maintain are solved, and the technical effects that the structure is simpler, and the differential mechanism is not prone to damage are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a differential device, a vehicle axle and a vehicle. Background Art

[0002] In the prior art, differentials are mainly used in the field of automotive technology. When a car turns, the rotation speeds of the left and right wheels are different. In order to ensure that the car is not prone to slipping due to the different rotation speeds of the wheels on both sides during the turning process, a differential is used to achieve different rotation speeds for the wheels on both sides of the vehicle.

[0003] The differentials in the existing technology mainly include bevel gear differentials, Torsen differentials, and cylindrical gear differentials. Among them, the bevel gear differential is mainly composed of a pair of planetary bevel gears, a pair of sun bevel gears, a planetary wheel carrier, a differential case, axle gears and other parts. The structures of other differentials are also very complicated, which makes the differentials easy to damage and inconvenient to repair. Utility Model Content

[0004] The purpose of the utility model is to provide a differential device, an axle and a vehicle, which solve the technical problems in the prior art that the differential mechanism is complex, resulting in easy damage to the differential and inconvenient maintenance.

[0005] In order to solve the above technical problems, the present invention provides a differential device, comprising a first planetary gear and a second planetary gear;

[0006] The first planetary gear is connected to the input end, the first output end of the first planetary gear is connected to the second planetary gear, and the second output end of the first planetary gear is connected to the wheel;

[0007] The second planetary gear row includes a second sun gear, second planetary gears, third planetary gears, and a second ring gear. A plurality of the second planetary gears and the third planetary gears are provided, and the plurality of the second planetary gears and the third planetary gears are respectively arranged along the circumference of the second sun gear. The second ring gear is sleeved on the plurality of the third planetary gears. The second sun gear, the plurality of the second planetary gears, the plurality of the third planetary gears, and the second ring gear are sequentially connected in a transmission manner.

[0008] The plurality of second planetary gears and the plurality of third planetary gears are respectively connected to the third output end of the second planetary gear set, and the third output end is connected to another wheel.

[0009] In an optional embodiment, the second planetary gear further comprises a second planet carrier;

[0010] The second planet carrier is arranged on one side of the second planet gear and the third planet gear, and the second planet carrier is rotatably connected to each of the second planet gears and each of the third planet gears, so that multiple second planet gears and multiple third planet gears can drive the second planet carrier to rotate relative to the second sun gear.

[0011] In an optional embodiment, a ring is provided on the second planet carrier;

[0012] There are multiple circular rings, which are arranged at intervals along the circumference of the second planetary carrier. Each of the circular rings is provided with a second planetary gear and a third planetary gear, and the second planetary gear and the third planetary gear are respectively rotatably connected to the circular rings.

[0013] In an optional embodiment, the connections between the second planetary gear and the third planetary gear and the circular ring are far away from each other and are arranged along the diameter direction of the circular ring.

[0014] In an optional embodiment, the second ring gear is fixed.

[0015] In an optional embodiment, the first planetary gear includes a first sun gear, a first planetary gear and a first ring gear, the first sun gear is connected to the input end, a plurality of first planetary gears are provided, and the plurality of first planetary gears are arranged at intervals along the circumference of the first sun gear, the first ring gear is mounted on the plurality of first planetary gears, and the first sun gear, the plurality of first planetary gears and the ring gear are sequentially connected in transmission.

[0016] In an optional embodiment, the plane where the axis of the second planetary gear and the axis of the third planetary gear lie is spaced apart from the axis of the second sun gear.

[0017] The utility model also provides a vehicle axle, comprising a left shaft, a right shaft and the differential device;

[0018] One end of the left shaft is connected to the second output end, and the other end of the left shaft is connected to the wheel;

[0019] One end of the right shaft is connected to the third output end, and the other end of the right shaft is connected to another wheel;

[0020] The axis of the left shaft and the axis of the right shaft are arranged on the same straight line.

[0021] In an optional embodiment, a drive motor is further included. The drive motor is provided with the input end. The drive motor is connected to the first planetary gear, and the drive motor is used to drive the first planetary gear to rotate.

[0022] The utility model also provides a vehicle, comprising the axle.

[0023] The utility model provides a differential device, an axle, and a vehicle, wherein the differential device includes a first planetary gear and a second planetary gear; the first planetary gear is connected to an input end, a first output end of the first planetary gear is connected to the second planetary gear, and the second output end of the first planetary gear is connected to a wheel; the second planetary gear includes a second sun gear, a second planetary gear, a third planetary gear, and a second ring gear; a plurality of second planetary gears and a plurality of third planetary gears are provided, and the plurality of second planetary gears and the plurality of third planetary gears are respectively arranged along the circumference of the second sun gear; the second ring gear is mounted on the plurality of third planetary gears, and the second sun gear, the plurality of second planetary gears, the plurality of third planetary gears, and the second ring gear are sequentially connected in a transmission manner; the plurality of second planetary gears and the plurality of third planetary gears are respectively connected to the third output end of the second planetary gear, and the third output end is connected to another wheel. Differential speed and reduction are achieved by using the first and second planetary gears, resulting in a simple structure, solving the technical problem of complex differential mechanisms in the prior art, which leads to easy damage and inconvenient maintenance of the differential, thereby achieving the technical effect of a simpler structure and less damage to the differential. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the differential device mentioned in the embodiment of the present utility model;

[0025] Figure 2 This is a front view of the second planetary gear mentioned in an embodiment of the present utility model;

[0026] Figure 3 This is a schematic structural diagram of the second planetary gear mentioned in an embodiment of the present utility model.

[0027] In the figure, 1-second sun gear; 2-second planetary gear; 3-third planetary gear; 4-second ring gear; 5-second planet carrier; 6-annular ring; 7-first sun gear; 8-first planetary gear; 9-first ring gear; 10-left shaft; 11-right shaft; 12-exhaust zone motor. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] In related technologies, differentials mainly include bevel gear differentials, Torsen differentials, and cylindrical gear differentials. Among them, the bevel gear differential is mainly composed of a pair of planetary bevel gears, a pair of sun bevel gears, a planetary wheel carrier, a differential case, axle gears and other parts. The structures of other differentials are also very complicated, which makes the differentials easy to damage and inconvenient to repair.

[0031] In view of this, if Figure 1-Figure 3 As shown, some embodiments of the present invention provide a differential device, including a first planetary gear row and a second planetary gear row; the first planetary gear row is connected to the input end, the first output end of the first planetary gear row is connected to the second planetary gear row, and the second output end of the first planetary gear row is connected to the wheel; the second planetary gear row includes a second sun gear 1, a second planetary gear 2, a third planetary gear 3 and a second ring gear 4, and a plurality of second planetary gears 2 and a plurality of third planetary gears 3 are provided, and the plurality of second planetary gears 2 and the plurality of third planetary gears 3 are respectively arranged along the circumference of the second sun gear 1, and the second ring gear 4 is sleeved on the plurality of third planetary gears 3, and the second sun gear 1, the plurality of second planetary gears 2, the plurality of third planetary gears 3 and the second ring gear 4 are sequentially connected in transmission; the plurality of second planetary gears 2 and the plurality of third planetary gears 3 are respectively connected to the third output end of the second planetary gear row, and the third output end is connected to another wheel.

[0032] In the above embodiment, the first planetary gear and the second planetary gear can be arranged side by side, and the axes of the first planetary gear and the second planetary gear can be arranged on the same straight line. The input end can be connected to the first planetary gear so that the input end can drive the first planetary gear to rotate, and the first output end of the first planetary gear is connected to the second sun gear 1 of the second planetary gear. The second sun gear 1 is respectively engaged with multiple second planetary gears 2. The multiple second planetary gears 2 are evenly arranged along the circumference of the second sun gear 1, and a third planetary gear 3 is provided on the side of each second planetary gear 2 away from the second sun gear 1, that is, the number of second planetary gears 2 and third planetary gears 3 is the same, and the third planetary gears 3 are arranged at intervals from the second sun gear 1, and a second ring gear 4 is provided on the outer sleeve of the multiple third planetary gears 3. The second sun gear 1 drives the second planetary gears 2 and the third planetary gears 3 to rotate relative to the second ring gear 4, and the second planetary gears 2 and the third planetary gears 3 drive the vehicle gears to rotate.

[0033] Some embodiments of the present invention provide a differential device comprising a first planetary gear set and a second planetary gear set; the first planetary gear set is connected to an input end, a first output end of the first planetary gear set is connected to the second planetary gear set, and a second output end of the first planetary gear set is connected to a wheel; the second planetary gear set comprises a second sun gear 1, a second planetary gear 2, a third planetary gear 3, and a second ring gear 4; a plurality of second planetary gears 2 and a plurality of third planetary gears 3 are provided, and the plurality of second planetary gears 2 and third planetary gears 3 are respectively arranged along the circumference of the second sun gear 1; the second ring gear 4 is sleeved on the plurality of third planetary gears 3; the second sun gear 1, the plurality of second planetary gears 2, the plurality of third planetary gears 3, and the second ring gear 4 are sequentially connected in a transmission manner; the plurality of second planetary gears 2 and the plurality of third planetary gears 3 are respectively connected to the third output end of the second planetary gear set, and the third output end is connected to another wheel. Differential and reduction are achieved by the first and second planetary gear sets, resulting in a simple structure, solving the technical problem of complex differential mechanisms in the prior art, which leads to easy damage and inconvenient maintenance of the differential, thereby achieving the technical effect of a simpler structure and less damage to the differential.

[0034] In an optional embodiment, the second planetary gear row also includes a second planetary carrier 5; the second planetary carrier 5 is arranged on one side of the second planetary gear 2 and the third planetary gear 3, and the second planetary carrier 5 is respectively rotatably connected to each second planetary gear 2 and each third planetary gear 3, so that multiple second planetary gears 2 and multiple third planetary gears 3 can drive the second planetary carrier 5 to rotate relative to the second sun gear 1.

[0035] In the above embodiment, the second planetary carrier 5 can be made of metal, the second planetary gears 2 and the third planetary gears 3 have the same width, the second planetary carrier 5 can be arranged on one side of the second planetary gears 2 and the third planetary gears 3, the second planetary carrier 5 can be parallel to the end faces of the second planetary gears 2 and the third planetary gears 3, and the second planetary carrier 5 can be rotatably connected to each second planetary gear 2 and the third planetary gear 3, that is, each second planetary gear 2 and each third planetary gear 3 can have a rotating shaft rotatably connected to the second planetary carrier 5, so that each second planetary gear 2 and each third planetary gear 3 are engaged with each other, the distance between each second planetary gear 2 and each third planetary gear 3 is constant, and each second planetary gear 2 and each third planetary gear 3 remain engaged.

[0036] In an optional embodiment, a circular ring 6 is provided on the second planetary carrier 5; there are multiple circular rings 6, and the multiple circular rings 6 are arranged at intervals along the circumference of the second planetary carrier 5, and each circular ring 6 is provided with a second planetary gear 2 and a third planetary gear 3, and the second planetary gear 2 and the third planetary gear 3 are respectively rotatably connected to the circular ring 6.

[0037] In the above embodiment, the number of rings 6 is consistent with the number of second planetary gears 2, and multiple rings 6 can be evenly arranged along the circumference of the second planetary carrier 5, and the second planetary carrier 5 can also be annular. The diameter of the rings 6 is smaller than the diameter of the second planetary carrier 5, and each ring 6 can be rotatably connected to the rotating shaft of the second planetary gear 2 and the rotating shaft of the third planetary gear 3, so that the axis of each second planetary gear 2 is set inside the second planetary carrier 5, and the axis of each third planetary gear 3 is set outside the second planetary carrier 5, so that the third planetary gear 3 can be spaced apart from the second sun gear 1, and the two sides of the third planetary gear 3 are respectively and only connected to the second planetary gear 2 and the second ring gear 4, and the diameter of the second planetary gear 2 is close to the diameter of the third planetary gear 3, so that the diameter of the single new gear can be prevented from being too large through the second planetary gear 2 and the third planetary gear 3, which makes the sun gear and the ring gear easy to be damaged.

[0038] In an optional embodiment, the connections between the second planetary gear 2 and the third planetary gear 3 and the circular ring 6 are far away from each other and are arranged along the diameter direction of the circular ring 6 .

[0039] In the above embodiment, the axis of the second planetary gear 2 and the axis of the third planetary gear 3 respectively coincide with the circular ring 6, the axes of the second planetary gear 2 and the third planetary gear 3 are both arranged on a diameter of the circular ring 6, and the axes of the second planetary gear 2 and the third planetary gear 3 are away from each other, so that the second planetary gear 2 and the third planetary gear 3 are respectively stably connected to the circular ring 6.

[0040] In an optional embodiment, the second ring gear 4 is fixed.

[0041] In the above embodiment, the second ring gear 4 is fixed to the differential housing, and the second ring gear 4 can engage with the third planetary gear 3 respectively. Therefore, when the second sun gear 1 drives the second planetary gear 2 and the third planetary gear 3 to rotate, the second planetary gear 2 and the third planetary gear 3 can rotate relative to the second ring gear 4. When the second planetary gear 2 and the third planetary gear 3 rotate, they can also drive the second planet carrier 5 to rotate, and then the second planet carrier 5 can drive the wheels on the other side to rotate.

[0042] In an optional embodiment, the first planetary gear row includes a first sun gear 7, a first planetary gear 8 and a first ring gear 9. The first sun gear 7 is connected to the input end. A plurality of first planetary gears 8 are provided. The plurality of first planetary gears 8 are arranged at intervals along the circumference of the first sun gear 7. The first ring gear 9 is sleeved on the plurality of first planetary gears 8. The first sun gear 7, the plurality of first planetary gears 8 and the ring gear are sequentially connected in transmission.

[0043] In the above embodiment, four first planetary gears 8 can be arranged around the first sun gear 7, and the four first planetary gears 8 can be evenly arranged along the circumference of the first sun gear 7. The first sun gear 7 can be engaged with the four first planetary gears 8, and a first ring gear 9 can be sleeved outside the four first planetary gears 8. The first planetary gears 8 can be engaged with the first ring gear 9, and a first output end is provided on the first ring gear 9. The first ring gear 9 can be connected to the second sun gear 1 by means of a connecting shaft or a sleeve, and a second output end can be provided on the first planetary gear 8. Multiple first planetary gears 8 can be connected to the wheels so that the first planetary gears 8 can rotate with the wheels.

[0044] Furthermore, a first planet carrier can be provided on one side of the first planetary gear 8, and the first planet carrier can be rotatably connected to each first planetary gear 8 respectively, so that multiple first planetary gears 8 can drive the first planet carrier to rotate, and the first planet carrier can drive the wheel to rotate.

[0045] In an optional embodiment, the plane where the axis of the second planetary gear 2 and the axis of the third planetary gear 3 lie is spaced apart from the axis of the second sun gear 1 .

[0046] In the above embodiment, the axes of the second planetary gears 2 and the third planetary gears 3 are arranged parallel to each other and on the same plane. The plane in which the axes of the second planetary gears 2 and the third planetary gears 3 lie is parallel to the axis of the second sun gear 1 and spaced apart from each other. This ensures that the diameters of the second planetary gears 2 and the third planetary gears 3 are maintained while allowing the second sun gear 1 to transmit power to the second ring gear 4 through the second planetary gears 2 and the third planetary gears 3.

[0047] Some embodiments of the present invention also provide a vehicle axle, including a left shaft 10, a right shaft 11 and a differential device; one end of the left shaft 10 is connected to the second output end, and the other end of the left shaft 10 is connected to the wheel; one end of the right shaft 11 is connected to the third output end, and the other end of the right shaft 11 is connected to another wheel; the axis of the left shaft 10 and the axis of the right shaft 11 are arranged on the same straight line.

[0048] In the above embodiment, the axes of the left shaft 10 and the right shaft 11 are set on the same straight line, and the left shaft 10 and the right shaft 11 can both be made of metal. One end of the left shaft 10 can be connected to the first planetary carrier, and the other end is connected to the wheel on the left, while one end of the right shaft 11 can be connected to the second planetary carrier 5, and the other end of the right shaft 11 can be connected to the wheel on the right. The axle can include a front axle and a rear axle, the left shaft 10 and the right shaft 11 can be rotatably connected in the axle respectively, the left shaft 10 and the right shaft 11 can be extended along the length direction of the axle, and the differential can be fixed in the middle position of the axle.

[0049] In an optional embodiment, a drive motor 13 is further included. The drive motor 13 is provided with an input terminal. The drive motor 13 is connected to the first planetary gear. The drive motor 13 is used to drive the first planetary gear to rotate.

[0050] In the above embodiment, the drive motor 13 can be fixed on the axle, the drive motor 13 can be set on one side of the differential, the output end of the drive motor 13 can be connected to the first sun gear 7, and the drive motor 13 can drive the first sun gear 7 to rotate.

[0051] Some embodiments of the present invention further provide a vehicle including an axle.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A differential device, characterized in that: including a first planetary row and a second planetary row; The first planetary gear is connected to the input end, the first output end of the first planetary gear is connected to the second planetary gear, and the second output end of the first planetary gear is connected to the wheel; The second planetary gear row includes a second sun gear, a second planetary gear, a third planetary gear and a second ring gear. There are multiple second planetary gears and multiple third planetary gears, and the multiple second planetary gears and multiple third planetary gears are respectively arranged along the circumference of the second sun gear. The second ring gear is sleeved on the multiple third planetary gears. The second sun gear, multiple second planetary gears, multiple third planetary gears and the second ring gear are sequentially connected in transmission connection; the multiple second planetary gears and multiple third planetary gears are respectively connected to the third output end of the second planetary gear row, and the third output end is connected to another wheel.

2. The differential device according to claim 1, characterized in that: The second planetary gear further comprises a second planet carrier; The second planet carrier is arranged on one side of the second planet gear and the third planet gear, and the second planet carrier is rotatably connected to each of the second planet gears and each of the third planet gears, so that multiple second planet gears and multiple third planet gears can drive the second planet carrier to rotate relative to the second sun gear.

3. The differential device according to claim 2, characterized in that: The second planet carrier is provided with a ring; There are multiple circular rings, which are arranged at intervals along the circumference of the second planetary carrier. Each of the circular rings is provided with a second planetary gear and a third planetary gear, and the second planetary gear and the third planetary gear are respectively rotatably connected to the circular rings.

4. The differential device according to claim 3, characterized in that: The connections between the second planetary gear and the third planetary gear and the circular ring are far away from each other and are arranged along the diameter direction of the circular ring.

5. The differential device according to claim 1, wherein: The second ring gear is fixed.

6. The differential device according to claim 1, wherein: The first planetary gear row includes a first sun gear, first planetary gears and a first ring gear. The first sun gear is connected to the input end. A plurality of first planetary gears are provided. The plurality of first planetary gears are arranged at intervals along the circumference of the first sun gear. The first ring gear is sleeved on the plurality of first planetary gears. The first sun gear, the plurality of first planetary gears and the ring gear are sequentially connected in transmission.

7. The differential device according to claim 1, wherein: The plane where the axis of the second planetary gear and the axis of the third planetary gear lie is spaced apart from the axis of the second sun gear.

8. A vehicle axle, characterized in that: comprising a left shaft, a right shaft and a differential device as claimed in any one of claims 1 to 7; One end of the left shaft is connected to the second output end, and the other end of the left shaft is connected to the wheel; One end of the right shaft is connected to the third output end, and the other end of the right shaft is connected to another wheel; The axis of the left shaft and the axis of the right shaft are arranged on the same straight line.

9. The axle according to claim 8, characterized in that It also includes a drive motor, which is provided with the input end. The drive motor is connected to the first planetary gear, and the drive motor is used to drive the first planetary gear to rotate.

10. A vehicle, characterized in that: Comprising the axle as claimed in claim 8.

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