CN216975684U

CN216975684U - Power transmission system for vehicle and vehicle with power transmission system

Info

Publication number: CN216975684U
Application number: CN202122979961.XU
Authority: CN
Inventors: 夏磊; 施佳敏; 付才林; 练睿; 叶阳
Original assignee: Huizhou BYD Battery Co Ltd
Current assignee: Huizhou BYD Battery Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-07-15
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses a power transmission system for a vehicle and the vehicle with the same, wherein the power transmission system comprises: the gear shifting device comprises an input shaft, a planetary gear train, a first driving gear, a second driving gear, an output shaft and a gear shifting device, wherein the input shaft is connected with a power source; the planetary gear train comprises a sun gear, a planet carrier and a gear ring which are matched with each other, and the sun gear is connected with the input shaft; the first driving gear and the second driving gear are respectively connected with the planet carrier; the output shaft is sleeved with a first driven gear and a second driven gear in an empty manner, the first driven gear is meshed with the first driving gear, and the second driven gear is meshed with the second driving gear; the gear shifting device is arranged on the output shaft and selectively joints one of the first driven gear and the second driven gear to the output shaft; the gear shifting device and the planetary gear train are arranged opposite to each other in the radial direction. The power transmission system of the utility model uses the planetary gear train to carry out speed regulation, and simultaneously, the gear shifting device is arranged in the radial direction of the planetary gear train, so the power transmission system has compact structure, reasonable layout and convenient installation.

Description

Power transmission system for vehicle and vehicle with power transmission system

Technical Field

The utility model relates to the technical field of automobile transmission, in particular to a power transmission system for a vehicle and the vehicle with the power transmission system.

Background

In the related art, a speed change mechanism of a vehicle is usually arranged in a box body, because the space in the box body is limited, a planetary gear mechanism is usually selected for speed change of the vehicle, the planetary gear mechanism has large transmission ratio, small volume, stable work and large bearing capacity, and is suitable for speed change of the vehicle in the space in the box body. In the prior art, a transmission capable of realizing three-level speed reduction sequentially arranges a first-gear driving gear, a second-gear driving gear and a third-gear driving gear along the axial direction of an input shaft in a direction far away from a planetary gear mechanism, the planetary gear mechanism and a gear shifting device are staggered in the axial direction, the axial length occupies a large space, the structure is not compact, and the space in a box body is seriously wasted.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the utility model is to propose a driveline for a vehicle. The power transmission system of the utility model uses the planetary gear train to carry out speed regulation, and simultaneously, the gear shifting device is arranged in the radial direction of the planetary gear train, so the power transmission system has compact structure, reasonable layout and convenient installation.

The utility model also provides a vehicle with the power transmission system.

The power transmission system according to the present invention includes: the input shaft is connected with the power source; the planetary gear train comprises a sun gear, a planet carrier and a gear ring which are matched with each other, and the sun gear is connected with the input shaft; the first driving gear and the second driving gear are respectively connected with the planet carrier; the output shaft is sleeved with a first driven gear and a second driven gear in an empty manner, the first driven gear is meshed with the first driving gear, and the second driven gear is meshed with the second driving gear; a shift device that is provided on the output shaft and selectively engages one of the first driven gear and the second driven gear with the output shaft; the gear shifting device and the planetary gear train are arranged opposite to each other in the radial direction.

In the power transmission system, the power gear switching is realized by arranging the gear shifting device, and two-stage speed regulation can be realized; the gear shifting device is opposite to the planetary gear train in the radial direction, so that the gear shifting device is overlapped with the planetary gear train in the axial direction, the space occupation of the power transmission system in the axial direction is reduced, and the power transmission system is more compact in structure, simple in layout and convenient and fast to install.

According to some embodiments of the utility model, the sun gear is disposed between the first driving gear and the second driving gear.

According to some embodiments of the utility model, the gear shift device is disposed between the first driven gear and the second driven gear.

According to some embodiments of the utility model, the sun gear is disposed on a side of the first driving gear facing away from the second driving gear.

According to some embodiments of the utility model, the gear shifting device is located on a side of the first driven gear facing away from the second driven gear.

According to some embodiments of the utility model, the gear shift device comprises: the tooth holder is sleeved on the periphery of the output shaft; a sliding sleeve slidably disposed at an outer periphery of the toothholder and selectively slidable to engage the first or second driven gear with the toothholder.

According to some embodiments of the present invention, the planet carrier comprises a first planet carrier and a second planet carrier, the first planet carrier and the second planet carrier are respectively sleeved on the input shaft and located at two sides of the sun gear, and the planet gear is located between the first planet carrier and the second planet carrier and respectively connected with the first planet carrier and the second planet carrier through a planet shaft.

According to some embodiments of the utility model, the power transmission system further comprises: the gear shifting device comprises a shell, wherein a gear ring mounting seat is arranged in the shell, a gear ring is fixed in the gear ring mounting seat, and a avoiding notch right opposite to the gear shifting device is formed in the gear ring mounting seat.

According to some embodiments of the utility model, the power transmission system further comprises: and the input gear of the differential is linked with the output shaft.

A vehicle according to another aspect of the embodiment of the utility model is briefly described below.

According to the power transmission system provided by the embodiment of the utility model, the vehicle is provided with the power transmission system provided by the embodiment of the utility model, so that the vehicle is reasonable in spatial layout, stable in power transmission and light in overall weight, the cruising range is improved, and the cost of the vehicle is reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an overall configuration diagram of a power transmission system according to an embodiment of the utility model.

FIG. 2 is a cross-sectional view of a powertrain system according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a powertrain system according to an embodiment of the present invention.

Reference numerals are as follows:

a power transmission system 1; an input shaft 10;

a sun gear 21; a first carrier 223; a second planet carrier 224; the ring gear 23; a planet wheel 24; a planet shaft 25; a first drive gear 30; a second drive gear 40;

an output shaft 50; the first driven gear 53; a second driven gear 54; a shift device 60; a tooth holder 61; a sliding sleeve 62;

a ring gear mount 70; a differential 80; an input gear 81.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed 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 that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A power transmission system 1 for a vehicle according to an embodiment of the utility model is described below with reference to fig. 1 to 3.

As shown in fig. 1, a power transmission system 1 according to the present invention includes: the transmission comprises an input shaft 10, a planetary gear train, a first driving gear 30, a second driving gear 40, an output shaft 50 and a gear shifting device 60, wherein the input shaft 10 is connected with a power source; the planetary gear train comprises a sun gear 21, a planet carrier and a gear ring 23 which are matched with each other, wherein the sun gear 21 is connected with the input shaft 10; the first driving gear 30 and the second driving gear 40 are respectively connected with the planet carrier; the output shaft 50 is sleeved with a first driven gear 53 and a second driven gear 54 in an empty manner, the first driven gear 53 is meshed with the first driving gear 30, and the second driven gear 54 is meshed with the second driving gear 40; a shifting device 60 that is provided on the output shaft 50 and selectively engages one of the first driven gear 53 and the second driven gear 54 to the output shaft 50; in which the shifting device 60 is arranged diametrically opposite the planetary gear train.

Specifically, the power source is connected with the input shaft 10, the periphery of the input shaft 10 may be provided with threads to serve as a sun gear 21, the planet carrier is respectively connected with a first driving gear 30 and a second driving gear 40, power is input by the sun gear 21 and output by the planet carrier after being decelerated, a first driven gear 53 and a second driven gear 54 and a shifting device 60 are sleeved on the output shaft 50, the shifting device 60 is opposite to the planetary gear system in the radial direction, the first driving gear 30 transmits power to the first driven gear 53, the second driving gear 40 transmits power to the second driven gear 54, and the shifting device 60 selectively connects one of the first driven gear 53 and the second driven gear 54 to the output shaft 50, so that different speed ratios can be selected to complete power transmission from the input shaft 10 to the output shaft 50 and gear shifting speed regulation of the power transmission system 1.

More specifically, the power transmission system 1 has three power transmission states of neutral, first gear, and second gear. In the neutral state, neither the first driven gear 53 nor the second driven gear 54 is engaged with the output shaft 50; in the first gear state, the first driving gear 30 is engaged with the first driven gear 53, and the shifting device 60 is adjusted to make the first driven gear 53 engaged with the output shaft 50, so that the power of the power source is transmitted to the first driving gear 30 via the input shaft 10, then transmitted to the first driven gear 53, and finally output by the output shaft 50; in the second gear state, the second driving gear 40 is engaged with the second driven gear 54, and the shift device 60 is adjusted to engage the second driven gear 54 with the output shaft 50, so that the power of the power source is transmitted to the second driving gear 40 via the input shaft 10, then to the second driven gear 54, and finally outputted by the output shaft 50.

In the power transmission system 1 related to the utility model, the power gear switching is realized by arranging the gear shifting device 60, and two-stage speed regulation can be realized; the gear shifting device 60 is opposite to the planetary gear train in the radial direction, so that the gear shifting device 60 is overlapped with the planetary gear train in the axial direction, the space occupation of the power transmission system 1 in the axial direction is reduced, the structure of the power transmission system 1 is more compact, the layout is simple, and the installation is convenient.

According to some embodiments of the present invention, as shown in fig. 1-3, the sun gear 21 is disposed between the first driving gear 30 and the second driving gear 40, and the sun gear 21 may be coaxially disposed with the first driving gear 30 and the second driving gear 40, respectively. The sun gear 21, the first driving gear 30 and the second driving gear 40 may be located at both sides of the planet carrier, so that the power output of the planet carrier is distributed uniformly, and the layout of the planetary gear mechanism is simplified, and the installation is easy, and the first driving gear 30 and the second driving gear 40 located at both sides of the planetary gear mechanism may be used to protect the planetary gear mechanism, which is convenient for the maintenance of the power transmission system 1.

According to some embodiments of the present invention, as shown in fig. 1-3, a shifting device 60 is disposed between the first driven gear 53 and the second driven gear 54. The gear shifting device 60 is arranged on the output shaft 50, the first driven gear 53 and the second driven gear 54 are sleeved on the output shaft 50, the gear shifting device 60 is arranged between the first driven gear 53 and the second driven gear 54, the gear shifting device 60 can be conveniently connected with one of the first driven gear 53 and the second driven gear 54 in a selected mode, the gear shifting device 60 is respectively located on two axial sides of the gear shifting device 60, the gear shifting device 60 is convenient to control gear shifting of the first driven gear 53 and the second driven gear 54 in the arrangement position, and the gear shifting device is simple in structure, reasonable and compact in layout.

According to some embodiments of the present invention, the sun gear 21 is disposed on a side of the first driving gear 30 away from the second driving gear 40. According to some embodiments of the utility model, the shifting device 60 is located on the side of the first driven gear 53 facing away from the second driven gear 54. The shift device 60 and the planetary gear mechanism are diametrically opposed to each other in the axial space, and therefore, the compact layout of the power transmission system 1 can be realized, while the position of the planetary gear mechanism and the position of the shift device 60 are not limited, and the shift device 60 may be provided outside the two driven gears, and the compact layout of the power transmission system 1 can be realized.

According to some embodiments of the present invention, as shown in fig. 1-3, the shifting device 60 includes a carrier 61 and a sliding sleeve 62. The gear seat 61 is sleeved on the periphery of the output shaft 50; the sliding sleeve 62 is slidably provided on the outer periphery of the holder 61 and selectively slides to engage the first driven gear 53 or the second driven gear 54 with the holder 61. Specifically, the shifting device 60 is sleeved on the output shaft 50 and located between the first driven gear 53 and the second driven gear 54, a sliding sleeve 62 is disposed on an outer periphery of the gear seat 61, and the sliding sleeve 62 can selectively slide to engage the first driven gear 53 or the second driven gear 54 with the gear seat 61, so that power gear switching between the first gear state and the second gear state is completed, and the operation is simple.

According to some embodiments of the present invention, as shown in fig. 1 to fig. 3, the planet carrier includes a first planet carrier 223 and a second planet carrier 224, the first planet carrier 223 and the second planet carrier 224 are respectively sleeved on the input shaft 10 and located at two sides of the sun gear 21, and the planet gears 24 are located between the first planet carrier 223 and the second planet carrier 224 and respectively connected with the first planet carrier 223 and the second planet carrier 224 through a planet shaft 25. Specifically, the first planet carrier 223 is connected to the first driving gear 30, the second planet carrier 224 is connected to the second driving gear 40, the planet gears 24 are disposed between the first planet carrier 223 and the second planet carrier 224, and the planet shaft 25 penetrates through the first planet carrier 223, the planet gears 24 and the second planet carrier 224, so that the planet gears 24 are rotatably disposed on the planet carriers. The planet gears 24 are meshed with the sun gear 21 and rotate around the sun gear 21, and the arrangement of the first planet carrier 223 and the second planet carrier 224 can facilitate assembly of the power transmission system 1.

According to some embodiments of the utility model, the driveline 1 further comprises a housing. A gear ring mounting seat 70 is arranged in the shell, the gear ring 23 is fixed in the gear ring mounting seat 70, and an avoidance notch opposite to the gear shifting device 60 is arranged on the gear ring mounting seat 70. Specifically, as shown in fig. 1 to fig. 3, in order to avoid interference between the ring gear mounting seat 70 and the gear shifting device 60, and at the same time, provide space for other parts such as a shifting fork for driving the gear shifting device 60 to move, and under the condition that the ring gear 23 is ensured to be stable and reliable, the space occupied by the ring gear mounting seat 70 in the radial direction of the power transmission system is reduced, the space in the housing is more compact, and the planet gear 24 can be arranged in the ring gear 23, and the ring gear 23 is fixed on the ring gear mounting seat 70 in the housing, so as to fix the whole planetary gear mechanism.

According to some embodiments of the utility model, as shown in fig. 1-3, the driveline 1 further comprises a differential 80. The input gear 81 of the differential 80 is interlocked with the output shaft 50. The power output via the output shaft 50 may be output to the drive wheels through the differential 80, thereby achieving a power transmission process of the vehicle.

In some embodiments of the present invention, the powertrain 1 includes a housing, a differential 80, an input shaft 10, a planetary gear train, first and second driving gears 30 and 40, an output shaft 50, and a shifting device 60. The planetary gear train includes a sun gear 21, a planetary carrier including a first planetary carrier 223 and a second planetary carrier 224, and a ring gear 23, the output shaft 50 is sleeved with a first driven gear 53 and a second driven gear 54, and the gear shift device 60 includes a gear seat 61 and a sliding sleeve 62.

Wherein the sun gear 21 is arranged in the center of the ring gear 23, the planet gears 24 are arranged between the shaft of the sun gear 21 and the ring gear 23, and the planet gears 24 are rotatably arranged on the planet carrier. The sun gear 21 is sleeved on the input shaft 10, one end of the input shaft 10 is connected with the motor, the other end of the input shaft 10 is supported on the shell through a bearing, the gear ring 23 is fixed in the shell, and the planet shaft 25 penetrates through the planet wheel 24 and can be supported on the planet shaft 25 through the bearing. The first driving gear 30 is engaged with the first driven gear 53, the second driving gear 40 is engaged with the second driven gear 54, the first driving gear 30 is fixed to the first carrier 223 by a connection key, and the second driving gear 40 is fixed to the second carrier 224 by a connection key.

The tooth holder 61 is mounted on the output shaft 50 through a connecting key, the sliding sleeve 62 is slidably disposed on the tooth holder 61, a shaft sleeve is further disposed on the output shaft 50, the first driven gear 53 is rotatably supported on the output shaft 50 through a bearing, and the second driven gear 54 is also rotatably supported on the shaft sleeve through a bearing. The output shaft 50 is rotatably supported on the housing by a bearing. The sliding sleeve 62 slides on the gear seat 61, and the first gear and the second gear can be switched by matching with the first driven gear 53 or the second driven gear 54. An input gear 81 of the differential 80 is linked with the output shaft 50, the input gear 81 of the differential 80 is sleeved on the differential 80, and the differential 80 is installed on the shell.

The power transmission system 1 of the present invention has three power transmission states, and when the sliding sleeve 62 is located at the middle position of the toothholder 61, the power transmission system 1 is in a neutral state; when the sliding sleeve 62 moves towards the first driven gear 53 to connect the sliding sleeve 62 with the first driven gear 53, the first driving gear 30, the sliding sleeve 62, the gear seat 61 and the output shaft 50 are connected at this time, that is, the first driving gear 30 and the output shaft 50 are in a connected state, which is a first gear state; when the sliding sleeve 62 moves toward the second driven gear 54 to connect the sliding sleeve 62 and the second driven gear 54, the second driving gear 40, the sliding sleeve 62, the gear seat 61, and the output shaft 50 are connected at this time, that is, the second driving gear 40 and the output shaft 50 are in a connected state, i.e., in a second gear state. Shifting of the drive train 1 can be achieved by moving the sliding sleeve 62 in the shifting device 60.

The vehicle according to the present invention is briefly described below.

According to the vehicle provided with the power transmission system 1 of the embodiment, the vehicle is reasonable in structural arrangement, first-gear speed regulation and second-gear speed regulation can be achieved, the sun gear 21 is arranged in the gear ring 23, the gear shifting mechanism and the gear ring 23 are arranged side by side, the internal space of the box is effectively saved, and the structure is more compact. The power transmission system 1 is convenient to install, can effectively guarantee the use stability and reliability, and is high in applicability and good in practicability.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

While embodiments of the present invention have been shown and described above, variations, modifications, substitutions, and alterations are possible in the above embodiments.

Claims

1. A driveline (1) for a vehicle, comprising:

an input shaft (10), the input shaft (10) being connected to a power source;

a planetary gear train including a sun gear (21), a carrier, and a ring gear (23) that are engaged with each other, the sun gear (21) being connected to the input shaft (10);

the planetary gear set comprises a first driving gear (30) and a second driving gear (40), wherein the first driving gear (30) and the second driving gear (40) are respectively connected with a planetary carrier;

the output shaft (50) is sleeved with a first driven gear (53) and a second driven gear (54), the first driven gear (53) is meshed with the first driving gear (30), and the second driven gear (54) is meshed with the second driving gear (40);

a shift device (60) that is provided on the output shaft (50) and selectively engages one of the first driven gear (53) and the second driven gear (54) with the output shaft (50); wherein

The gear shifting device (60) and the planetary gear train are arranged in a manner of being opposite to each other in the radial direction.

2. The powertrain system (1) for a vehicle according to claim 1, characterized in that the sun gear (21) is disposed between the first driving gear (30) and the second driving gear (40).

3. The powertrain system (1) for a vehicle according to claim 2, characterized in that the shifting device (60) is disposed between the first driven gear (53) and the second driven gear (54).

4. The drivetrain (1) for a vehicle according to claim 1, characterized in that the sun gear (21) is arranged on the side of the first drive gear (30) facing away from the second drive gear (40).

5. The driveline (1) for a vehicle according to claim 4, characterized in that the gear shift device (60) is located on a side of the first driven gear (53) facing away from the second driven gear (54).

6. The powertrain system (1) for a vehicle according to claim 3 or 5, characterized in that the shifting device (60) includes:

the tooth holder (61), the periphery of the said output shaft (50) of said tooth holder (61) cover;

a sliding sleeve (62), the sliding sleeve (62) being slidably disposed at an outer periphery of the toothholder (61) and selectively slidable to engage the first driven gear (53) or the second driven gear (54) with the toothholder (61).

7. The drivetrain (1) for a vehicle according to claim 6, characterized in that the planet carriers comprise a first planet carrier (223) and a second planet carrier (224), the first planet carrier (223) and the second planet carrier (224) being respectively sleeved on the input shaft (10) and located on both sides of the sun gear (21), planet wheels (24) being located between the first planet carrier (223) and the second planet carrier (224) and being respectively connected with the first planet carrier (223) and the second planet carrier (224) by a planet shaft (25).

8. The powertrain system (1) for a vehicle according to claim 1, characterized by further comprising:

the gear shifting device comprises a shell, wherein a gear ring mounting seat (70) is arranged in the shell, a gear ring (23) is fixed in the gear ring mounting seat (70), and a avoidance notch right opposite to the gear shifting device (60) is formed in the gear ring (23) mounting seat.

9. The powertrain system (1) for a vehicle according to claim 1, characterized by further comprising: and the input gear (81) of the differential (80) is linked with the output shaft (50).

10. A vehicle, characterized by comprising a driveline (1) according to any one of claims 1-9.