CN220168541U - Planet row type reduction gearbox structure, reduction gearbox and vehicle - Google Patents

Abstract

The utility model relates to a vehicle technical field especially relates to a planet row formula reducing gear box structure, reducing gear box and vehicle, this planet row formula reducing gear box structure includes first planet row, second planet row, first semi-axis, second semi-axis and motor, first planet row and second planet row set up respectively in motor shaft ascending both sides, first planet row includes first sun gear, first planet wheel, first planet carrier and first ring gear, the second planet row includes second sun gear, the second planet wheel, second planet carrier and second ring gear, first planet carrier and second sun gear transmission are connected, first sun gear is connected in the motor, first ring gear is connected in first semi-axis, second ring gear is connected in the second semi-axis. Compared with the prior art, the differential structure can be canceled, the weight reduction purpose is realized, the structure is compact, and the large speed ratio can be realized.

Description

Planet row type reduction gearbox structure, reduction gearbox and vehicle

Technical Field

The disclosure relates to the technical field of vehicles, and in particular relates to a planetary gear type reduction gearbox structure, a reduction gearbox and a vehicle.

Background

The pure electric automobile is a novel clean energy automobile, and is advocated with great promotion of energy conservation and emission reduction, so that the pure electric automobile has become a great development trend.

The reduction gearbox in the prior art consists of two rows of NGW planetary rows and a differential mechanism, wherein the differential mechanism is arranged inside a motor rotor, power is transmitted to a first input shaft and a second input shaft on the left side and the right side by the motor rotor through the differential mechanism, the first input shaft is connected with a sun gear of the first NGW planetary row, the second input shaft is connected with a sun gear of the second NGW planetary row, and two planetary carriers of the first NGW planetary row and the second NGW planetary row are respectively used as outputs to be connected with a vehicle. Although the differential is disposed within the motor rotor, the axial dimension is shortened, the provision of the differential increases the weight and the speed ratio is small.

Disclosure of Invention

In order to solve the technical problem, the present disclosure provides a planetary gear type reduction gearbox structure, a reduction gearbox and a vehicle.

In a first aspect, the present disclosure provides a planetary gear type reduction gearbox structure, including first planet row, second planet row, first semi-axis, second semi-axis and motor, first planet row and second planet row set up respectively in motor shaft ascending both sides, first planet row includes first sun gear, first planet wheel, first planet carrier and first ring gear, second planet row includes second sun gear, second planet wheel, second planet carrier and second ring gear, first planet carrier with second sun gear transmission connects, first sun gear can connect in the motor, first ring gear connect in first semi-axis, second ring gear connect in the second semi-axis.

Optionally, the motor includes a rotor drivingly connected to the first sun gear.

Optionally, the planetary gear type reduction gearbox structure further comprises a connecting piece, wherein the connecting piece is connected between the first planet carrier and the second sun gear and penetrates through an inner hole of a rotor of the motor.

Optionally, the second planet carrier of the second planet row is fixed relative to the stationary part of the reduction gearbox.

Optionally, the motor further comprises a stator, the stator forms a stationary part of the reduction gearbox, and the second planet carrier is connected to the stator.

Optionally, the first planet row and the second planet row are coaxial.

Optionally, the first sun gear is meshed with the first planet gear, the first planet gear is meshed with the first gear ring, and the first planet gear is mounted on the first planet carrier.

Optionally, the second sun gear is meshed with the second planet gear, the second planet gear is meshed with the second gear ring, and the second planet gear is mounted on the second planet carrier.

In a second aspect, the present disclosure provides a reduction gearbox comprising the planetary gear type reduction gearbox structure disclosed in the first aspect.

In a third aspect, the present disclosure provides a vehicle comprising the reduction gearbox disclosed in the second aspect above.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

through setting up first planet row and second planet row respectively in motor shaft ascending both sides, first sun gear is as the input, and first semi-axis and second semi-axis are connected respectively as the output to first ring gear and second ring gear, can adjust the rotational speed of first ring gear and second ring gear through first planet carrier, realize differential function, compare prior art, can cancel differential structure, realize the purpose of subtracting heavy, compact structure moreover can realize big speed ratio.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a planetary gear type reduction gearbox according to an embodiment of the present disclosure.

Wherein, 1, a first planet row; 11. a first sun gear; 12. a first planet; 13. a first planet carrier; 14. a first ring gear;

2. a second planet row; 21. a second sun gear; 22. a second planet wheel; 23. a second carrier; 24. a second ring gear;

3. a first half shaft;

4. a second half shaft;

5. a motor; 51. a rotor; 52. and a stator.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

As shown in fig. 1, the embodiment of the present disclosure provides a planetary gear type reduction gearbox structure, which includes a first planetary gear 1, a second planetary gear 2, a first half shaft 3, a second half shaft 4, and a motor 5, where the first planetary gear 1 and the second planetary gear 2 are disposed on two sides of the motor 5 in an axial direction, respectively, the first planetary gear 1 includes a first sun gear 11, a first planet gear 12, a first planet carrier 13, and a first ring gear 14, the second planetary gear 2 includes a second sun gear 21, a second planet gear 22, a second planet carrier 23, and a second ring gear 24, the first sun gear 11 can be connected to the motor 5, the first planet carrier 13 and the second sun gear 21 are in driving connection, the first ring gear 14 is connected to the first half shaft 3, and the second ring gear 24 is connected to the second half shaft 4.

It can be understood that by arranging the first planetary gear set 1 and the second planetary gear set 2 on two sides of the motor 5 in the axial direction respectively, the first sun gear 11 is connected to the motor 5, the first sun gear 11 is used as an input, the first planet carrier 13 is in transmission connection with the second sun gear 21, the first gear ring 14 and the second gear ring 24 are used as outputs to be respectively connected with the first half shaft 3 and the second half shaft 4, the rotation speeds of the first gear ring 14 and the second gear ring 24 can be adjusted through the first planet carrier 13, the differential function is realized, compared with the prior art, the large speed ratio is realized, the differential structure is also cancelled, and the weight reduction purpose is realized.

Specifically, the motor 5 serves as a power source of a reduction gearbox for inputting power, and the power of the motor 5 is sequentially transmitted to the first planetary gear set 1 and the second planetary gear set 2. The power of the motor 5 is transmitted to the first planetary gear set 1 through the first sun gear 11. The first planet carrier 13 is in driving connection with the second sun gear 21, so that the power of the motor 5 is transmitted through the first planet carrier 13 to the second sun gear 21 and thus to the second planet carrier 2. The half shafts are used for transmitting power between the reduction gearbox and the driving wheels, the first half shaft 3 is used for transmitting power of the motor 5 to the left wheel of the vehicle, the second half shaft 4 is used for transmitting power of the motor 5 to the right wheel of the vehicle, namely, the first half shaft 3 and the second half shaft 4 are power output shafts of a planetary gear type reduction gearbox structure. The first half shaft 3 is connected with the first gear ring 14 of the first planetary gear set 1, the second half shaft 4 is connected with the second gear ring 24 of the second planetary gear set 2, the power of the motor 5 is transmitted to the first half shaft 3 through the first planetary gear set 1, and the power is transmitted to the second half shaft 4 through the first planetary gear set 1 and the second planetary gear set 2, so that the driving of the wheels of the vehicle is realized.

Further, referring to fig. 1, the motor 5 includes a rotor 51, and the rotor 51 is drivingly connected to the first sun gear 11. That is, the power of the motor 5 is transmitted to the first sun gear 11 through the rotor 51.

Further, the planetary gear type reduction gearbox structure further comprises a connecting piece, wherein the connecting piece is connected between the first planet carrier 13 and the second sun gear 21 and penetrates through an inner hole of the rotor 51 of the motor 5. The use of the internal bore of the rotor 51 to arrange the connection advantageously reduces the axial dimension of the planetary reduction gearbox construction.

Further, the first planetary row 1 and the second planetary row 2 are coaxial. The components of the first planetary row 1 are distributed along the radial direction of the first planetary row 1, the components of the second planetary row 2 are distributed along the radial direction of the second planetary row 2, and the first planetary row 1 and the second planetary row 2 are axially arranged. Wherein the radial direction of the first planet row 1 is perpendicular to the axial direction thereof, and the radial direction of the second planet row 2 is perpendicular to the axial direction thereof. The arrangement makes the structure of the planetary gear type reduction gearbox more compact, and is beneficial to arrangement of the reduction gearbox.

Further, the first half shaft 3 and the second half shaft 4 are coaxial, and the first half shaft 3 is coaxial with the first row of satellites 1. Specifically, the axial direction of the first planetary gear row 1 and the second planetary gear row 2 is the axial direction of the first half shaft 3 and the second half shaft 4.

Referring to fig. 1, the first planetary gear set 1 includes a first sun gear 11, a first planet gear 12, a first carrier 13, and a first ring gear 14, the first sun gear 11 is engaged with the first planet gear 12, the first planet gear 12 is engaged with the first ring gear 14, and the first planet gear 12 is mounted to the first carrier 13. Specifically, the first sun gear 11 is located at the center of the first planet row 1, the first planet gears 12 are meshed with the first sun gear 11, the first planet gears 12 are mounted on the first planet carrier 13, and the first planet carrier 13 provides support for the first planet gears 12. Meanwhile, the first planet gears 12 are meshed with the inner ring of the first gear ring 14, namely, the first planet gears 12, the first sun gear 11 and the first gear ring 14 are always in a meshed state, so that transmission among the three is realized.

Referring again to fig. 1, the second planetary gear row 2 includes a second sun gear 21, second planet gears 22, a second carrier 23, and a second ring gear 24, the second sun gear 21 meshes with the second planet gears 22, the second planet gears 22 mesh with the second ring gear 24, and the second planet gears 22 are mounted to the second carrier 23. Specifically, the second sun gear 21 is located at the center of the second planetary gear row 2, and the second planetary gears 22 mesh with the second sun gear 21. The second planet gears 22 are mounted on a second planet carrier 23, the second planet carrier 23 being positioned to provide support for the second planet gears 22. Meanwhile, the second planet wheel 22 is meshed with the inner ring of the second gear ring 24, namely, the second planet wheel 22, the adjacent second sun wheel 21 and the second gear ring 24 are always in a meshed state, so that transmission among the three is realized.

Further, the first planet row 1 further includes a first planet axle fixed to the first planet carrier 13, and the first planet 12 is mounted to the first planet carrier 13 through the first planet axle. The second planetary gear set 2 further comprises a second planetary gear shaft fixed to the second planet carrier 23, through which second planetary gear shaft the second planetary gear 22 is mounted to the second planet carrier 23.

Further, the second carrier 23 of the second planetary gear set 2 is fixed relative to the stationary part of the reduction gearbox. The second planet carrier 23 is relatively fixed with the stationary part of the reduction gearbox, so that the movement of the second planet carrier 23 is limited, the second planet carrier 23 becomes a stationary part, and the structural strength and stability of the planetary gear type reduction gearbox structure are improved.

Specifically, the motor 5 includes a stator 52, and the stator 52 of the motor 5 constitutes a stationary portion of the reduction gearbox. That is, the second carrier 23 is connected to the stator 52 of the motor 5; alternatively, the housing of the reduction gearbox may constitute a stationary part, and the second carrier 23 is connected to the housing of the reduction gearbox.

The principle of the planetary gear type reduction gearbox structure for realizing the differential function will be described in detail.

The rotation speed of the first ring gear 14 is determined by the rotation speed of the first sun gear 11, the rotation speed of the first carrier 13, and the number of teeth of the first sun gear 11 and the number of teeth of the first ring gear 14.

The rotation speed of the second ring gear 24 is determined by the rotation speed of the second sun gear 21 (the rotation speed of the second sun gear 21 is the same as that of the first carrier 13 because the second sun gear 21 is drivingly connected to the first carrier 13), and the number of teeth of the second sun gear 21 and the number of teeth of the second ring gear 24.

Since the rotation speed of the first sun gear 11, the number of teeth of the first ring gear 14, the number of teeth of the second sun gear 21, and the number of teeth of the second ring gear 24 remain unchanged, the rotation speed of the first ring gear 14 and the rotation speed of the second ring gear 24 are determined by the rotation speed of the first carrier 13, and when the rotation speeds of the first ring gear 14 and the second ring gear 24 need to be the same, the rotation speed of the first carrier 13 can be obtained. When the rotational speeds of the first ring gear 14 and the second ring gear 24 need to have a rotational speed difference, the rotational speed of the first carrier 13 can be found. In general terms. The rotational speed demand of the first ring gear 14 and the second ring gear 24 is achieved by the rotational speed adjustment of the first carrier 13.

For example, the first ring gear 14 corresponds to the left wheel of the vehicle via the first axle 3 and the second ring gear 24 corresponds to the right wheel of the vehicle via the second axle 4. When the vehicle is running straight, the left and right wheels need the same rotation speed, and at this time, the rotation speeds of the first ring gear 14 and the second ring gear 24 are the same through the rotation speed adjustment of the first carrier 13, so that the rotation speeds of the first half shaft 3 and the second half shaft 4 are the same. When the vehicle turns right, the rotation speed of the left wheel is higher than that of the right wheel, and the rotation speed of the first planet carrier 13 is adjusted so as to transmit a larger rotation speed to the first gear ring 14 and a smaller rotation speed to the second gear ring 24, thereby enabling the first half shaft 3 to output a higher rotation speed and enabling the second half shaft 4 to output a lower rotation speed. When the vehicle turns left, the rotation speed of the right wheel is higher than that of the left wheel, and the rotation speed of the first planet carrier 13 is adjusted so as to transmit a larger rotation speed to the second gear ring 24 and a smaller rotation speed to the first gear ring 14, so that the second half shaft 4 outputs a higher rotation speed and the first half shaft 3 outputs a bottoming rotation speed.

So, realize speed change and differential function through first planet row 1 and second planet row 2, compact structure can reduce weight to increase torque density (torque density=bear moment of torsion/weight, weight reduces then the torque density increases), realize the speed ratio scope more widely (be greater than or equal to 10) moreover, thereby make the rotational speed scope of motor bigger, can satisfy different design demands, enlarge application scope.

The embodiment of the disclosure further provides a reduction gearbox, which includes the planetary gear type reduction gearbox structure, and because the reduction gearbox adopts all the technical schemes of the above embodiment, the reduction gearbox at least has all the beneficial effects brought by the technical schemes of the above embodiment, and the description is omitted here.

The embodiment of the disclosure further provides a vehicle, which includes the reduction gearbox, and because the vehicle adopts all the technical solutions of the above embodiments, the vehicle has at least all the beneficial effects brought by the technical solutions of the above embodiments, and is not described herein again.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a planet row formula reducing gear box structure, its characterized in that, including first planet row, second planet row, first semi-axis, second semi-axis and motor, first planet row and second planet row set up respectively in the ascending both sides of motor shaft, first planet row includes first sun gear, first planet wheel, first planet carrier and first ring gear, the second planet row includes second sun gear, second planet wheel, second planet carrier and second ring gear, first planet carrier with second sun gear transmission connects, first sun gear connect in the motor, first ring gear connect in first semi-axis, second ring gear connect in the second semi-axis.

2. The planetary gear set type reduction gearbox structure according to claim 1, wherein the motor comprises a rotor drivingly connected to the first sun gear.

3. The planetary gear set reduction box structure according to claim 2, further comprising a connecting member connected between the first planet carrier and the second sun gear and penetrating an inner hole of a rotor of the motor.

4. The planetary gear type reduction gearbox structure according to claim 1, wherein the second planet carrier of the second planetary gear is relatively fixed to the stationary portion of the reduction gearbox.

5. The planetary gear set type reduction gearbox structure according to claim 4, wherein the motor further comprises a stator constituting a stationary part of the reduction gearbox, and the second planet carrier is connected to the stator.

6. The planetary gear set type reduction gearbox structure according to claim 1, wherein the first planetary gear set and the second planetary gear set are coaxial.

7. The planetary gear set type reduction gearbox structure according to claim 1, wherein the first sun gear is meshed with the first planet gears, the first planet gears are meshed with the first ring gear, and the first planet gears are mounted on the first planet carrier.

8. The planetary gear set type reduction gearbox structure according to claim 1, wherein the second sun gear is meshed with the second planet gears, the second planet gears are meshed with the second ring gear, and the second planet gears are mounted on the second planet carrier.

9. A reduction gearbox comprising a planetary gear set reduction gearbox arrangement as claimed in any one of claims 1 to 8.

10. A vehicle comprising the reduction gearbox of claim 9.