CN106949201A - Nine speed automatic transmissions - Google Patents

Abstract

The invention provides a kind of nine speed automatic transmission, including input link, output link, case of transmission, first planetary gearsets, second planetary gearsets, third planet gear train, first clutch, second clutch, 3rd clutch, 4th clutch, 5th clutch, first brake and second brake, the first clutch, second clutch, 3rd clutch, 4th clutch, 5th clutch, first brake and second brake are selectively engaged or separated, to produce nine forward gear transmissions when back gear ratio between the input link and output link.Nine speed automatic transmissions of the present invention, relative to the existing 4DOF 9AT automatic transmission being made up of 4 planetary gearsets, planetary gearsets quantity and number of degrees of freedom, all reduce 1, simplify the transmission system of nine speed automatic transmissions, control of product difficulty and compact designed are advantageously reduced, cost of goods manufactured is finally reduced.

Description

Nine-speed automatic transmission

technical field

The invention belongs to the technical field of automobile transmission, in particular to a nine-speed automatic transmission.

Background technique

In the prior art, an automatic transmission (Automatic Transmission, AT) for a car usually includes an input member, an output member, a planetary gear set, a clutch/brake, and a transmission member connecting the input member, the output member, the planetary gear set and the clutch/brake . The input member is usually connected to a starting element with integrated lock-up clutch, torsional damper, such as a torque converter. It can be seen from the mechanical principle that the condition for a mechanism to have definite motion is that the number of power sources of the mechanism is equal to the number of degrees of freedom of the mechanism's rotational speed. Since AT achieves different gears through the combined engagement of different clutches/brakes, that is, the degrees of freedom of the components are constrained by the brakes/clutches, so as to achieve the purpose of reducing the degree of freedom of the system, and finally ensure that the mechanism has a definite movement. For a single power source planetary transmission with N system degrees of freedom, the condition for definite motion is to limit (N-1) rotational speed degrees of freedom through operating elements such as brakes/clutches.

The volume, weight, efficiency and carrying capacity of an automatic transmission are directly related to the planetary gear mechanism. The number of planetary gear sets, the number of clutches/brakes and the connection of transmission components determine the complexity of the structural arrangement of the transmission scheme to a certain extent. The increase in the number of degrees of freedom and the increase in the number of operating elements for shifting between adjacent gears will increase the difficulty of HCU/TCU control. The power transmission route of each gear depends on the transmission scheme, and the occurrence of internal power circulation and affecting the transmission efficiency of each gear should be avoided.

With the increasingly stringent requirements of automobile emission regulations and fuel economy requirements, the demand for transmission gears has increased. For planetary automatic transmissions, there are two ways to increase gears: one is to increase the number of planetary rows (planetary gear sets); the other is to increase the number of degrees of freedom (which easily leads to an increase in operating elements). For this reason, seeking a planetary automatic transmission mechanism with an optimal combination of planetary row and number of operating elements, compact structure and high transmission efficiency has become the key to product development of major vehicle manufacturers or R&D institutions.

At present, there are mainly two types of transverse 9AT (9-speed automatic transmission) products equipped with passenger cars, namely ZF 9HP (ZF 9-speed automatic transmission) and GM 9AT (General 9-speed automatic transmission). The technical characteristics of the transmission scheme analyse as below:

The ZF 9HP product is a transverse automatic transmission that can realize 9 forward gears and 1 reverse gear. Its transmission system consists of 4 planetary gear sets, 4 clutches (including two Dog Clutches) and 2 brakes. The realization of each gear position requires the engagement of three manipulating elements, ie it is a four degrees of freedom system. This product is mainly used in Land Rover Range Rover Evoque, JEEP Cherokee and Honda Crown Road and other models. In order to meet the axial space requirements of the transverse transmission, the product adopts the radial stacking arrangement of the last two planetary rows and adopts the jaw clutch instead of part of the multi-plate wet clutch, but this brings about an increase in manufacturing cost and smoothness. decrease in sexual value.

The GM 9AT product is a transverse automatic transmission that can realize 9 forward gears and 1 reverse gear. Its transmission system consists of 4 planetary gear sets, 3 clutches and 4 brakes. The realization of each gear position requires the engagement of three manipulating elements, ie it is a four degrees of freedom system. This product has not yet been mass-produced and installed, and it is planned to be equipped with models such as Malibu and Cruze diesel versions. In order to meet the axial space requirements of the transverse transmission, a triple clutch (Triple Clutch) nested design and a controllable one-way clutch structure are adopted, and the axial space such as the hydraulic torque converter is optimized.

It can be seen that the existing horizontal 9AT technical solutions all use four planetary gear sets. For the compact and demanding axial space of the horizontal transmission system, in order to compress the axial space, the torque converter, engine and control elements need to be etc. to optimize the structure, which increases the design and manufacturing costs. And the transmission system composed of 4 planetary gear sets is relatively complicated.

Contents of the invention

The technical problem to be solved by the present invention is to provide a nine-speed automatic transmission for the defect that the transmission system composed of four planetary gear sets is relatively complicated in the existing nine-speed automatic transmission.

The technical solution adopted by the present invention to solve the problems of the technologies described above is as follows:

A nine-speed automatic transmission is provided, including:

input component;

output component;

transmission case;

The first planetary gear set, the second planetary gear set and the third planetary gear set; the first planetary gear set includes a first sun gear, a first planetary gear, a first ring gear and a first planet carrier; the first The sun gear is externally meshed with the first planetary gear, and the first planetary gear is internally meshed with the first ring gear. The first planetary wheel is rotatably supported on the first planet carrier; the second planetary gear set Including the second sun gear, the second planetary gear, the second ring gear and the second planet carrier; the second sun gear is externally meshed with the second planetary gear, and the second planetary gear is internally meshed with the second ring gear , the second planetary gear is rotatably supported on the second planetary carrier; the third planetary gear set includes a third sun gear, a third planetary gear, a third ring gear and a third planetary carrier; the third The sun gear is externally meshed with the third planetary gear, and the third planetary gear is internally meshed with the third ring gear. The third planetary wheel is rotatably supported on the third planetary carrier; the first planetary carrier and The second ring gear is fixedly connected, the second planet carrier is fixedly connected to the third ring gear, the first ring gear is fixedly connected to the output member, the second sun gear is fixedly connected to the input member, and the third sun gear is fixedly connected to the input member. The wheel is fixedly connected with the transmission housing;

a first clutch, a second clutch, a third clutch, a fourth clutch, a fifth clutch, a first brake, and a second brake, the third planet carrier is connected to the output member through the first clutch, and the first clutch is connected to the output member. The three planet carriers are connected to the input member through the second clutch, the first sun gear is connected to the input member through the fifth clutch and the third clutch in turn, and the first planet carrier is connected to the input member through the fifth clutch and the third clutch in turn. The fourth clutch and the third clutch are connected to the input member, the first sun gear is connected to the transmission case through the first brake, and the first planet carrier is connected to the transmission case through the second brake. shell connection;

The first clutch, second clutch, third clutch, fourth clutch, fifth clutch, first brake, and second brake are selectively engaged or disengaged to generate nine A forward gear ratio and a reverse gear ratio.

Optionally, by engaging the first clutch and second brake, disengaging the second clutch, third clutch, fourth clutch, fifth clutch and first brake, between the input member and the output member Generates 1st gear ratio;

By engaging the first clutch and first brake, disengaging the second clutch, third clutch, fourth clutch, fifth clutch and second brake to produce a 2nd gear transmission between the input member and the output member Compare;

By engaging the first clutch, fourth clutch and fifth clutch and disengaging the second clutch, third clutch, first brake and second brake to produce a 3rd gear transmission between the input member and the output member Compare;

4th gear is produced between the input member and the output member by engaging the first clutch, third clutch and fifth clutch and disengaging the second clutch, fourth clutch, first brake and second brake Compare;

By engaging the first clutch, third clutch and fourth clutch and disengaging the second clutch, fifth clutch, first brake and second brake to produce a 5th gear transmission between the input member and the output member Compare;

By engaging the first clutch and the second clutch, disengaging the third clutch, the fourth clutch, the fifth clutch, the first brake and the second brake to produce a 6th gear transmission between the input member and the output member Compare;

By engaging the second clutch, fourth clutch and fifth clutch, disengaging the first clutch, third clutch, first brake and second brake to produce a 7th gear transmission between the input member and the output member Compare;

By engaging the second clutch, third clutch and fifth clutch and disengaging the first clutch, fourth clutch, first brake and second brake to produce an 8-speed transmission between the input member and the output member Compare;

By engaging the second clutch and first brake, disengaging the first clutch, third clutch, fourth clutch, fifth clutch and second brake to produce a 9-speed transmission between the input member and the output member Compare.

Optionally, by engaging the third clutch, fifth clutch and second brake, disengaging the first clutch, second clutch, fourth clutch and first brake, between the input member and the output member Creates a reverse gear ratio.

Optionally, the first clutch, the second clutch, the third clutch, the fourth clutch and the fifth clutch are multi-plate wet clutches or jaw clutches.

Optionally, the first brake and the second brake are drum brakes or multi-plate wet brakes.

In addition, the present invention also provides another nine-speed automatic transmission, including:

input component;

output component;

transmission case;

The first planetary gear set, the second planetary gear set and the third planetary gear set; the first planetary gear set includes a first sun gear, a first planetary gear, a first ring gear and a first planet carrier; the first The sun gear is externally meshed with the first planetary gear, and the first planetary gear is internally meshed with the first ring gear. The first planetary wheel is rotatably supported on the first planet carrier; the second planetary gear set Including the second sun gear, the second planetary gear, the second ring gear and the second planet carrier; the second sun gear is externally meshed with the second planetary gear, and the second planetary gear is internally meshed with the second ring gear , the second planetary gear is rotatably supported on the second planetary carrier; the third planetary gear set includes a third sun gear, a third planetary gear, a third ring gear and a third planetary carrier; the third The sun gear is externally meshed with the third planetary gear, and the third planetary gear is internally meshed with the third ring gear. The third planetary wheel is rotatably supported on the third planetary carrier; the first planetary carrier and The second ring gear is fixedly connected, the second planet carrier is fixedly connected to the third ring gear, the first ring gear is fixedly connected to the output member, the second sun gear is fixedly connected to the input member, and the third sun gear is fixedly connected to the input member. The wheel is fixedly connected with the transmission housing;

a first clutch, a second clutch, a third clutch, a fourth clutch, a fifth clutch, a first brake, and a second brake, the third planet carrier is connected to the output member through the first clutch, and the first clutch is connected to the output member. The three planet carrier is connected to the input member through the second clutch, the first sun gear is connected to the input member through the fifth clutch, and the first planet carrier is connected to the input member through the fourth clutch. The input member is connected, the third clutch is connected between the first planet carrier and the first sun gear, the first sun gear is connected with the transmission housing through the first brake, and the first planet The frame is connected to the transmission housing through the second brake;

The first clutch, second clutch, third clutch, fourth clutch, fifth clutch, first brake, and second brake are selectively engaged or disengaged to generate nine A forward gear ratio and a reverse gear ratio.

Optionally, by engaging the first clutch and second brake, disengaging the second clutch, third clutch, fourth clutch, fifth clutch and first brake, between the input member and the output member Generates 1st gear ratio;

By engaging the first clutch and first brake, disengaging the second clutch, third clutch, fourth clutch, fifth clutch and second brake to produce a 2nd gear transmission between the input member and the output member Compare;

By engaging the first and third clutches and disengaging the second, fourth, fifth, first and second brakes to produce a 3rd gear transmission between the input member and the output member Compare;

By engaging the first and fifth clutches and disengaging the second, third, fourth, first and second brakes to produce a 4th gear transmission between the input member and the output member Compare;

5th gear is produced between the input member and the output member by engaging the first and fourth clutches and disengaging the second, third, fifth, first and second brakes Compare;

By engaging the first clutch and the second clutch, disengaging the third clutch, the fourth clutch, the fifth clutch, the first brake and the second brake to produce a 6th gear transmission between the input member and the output member Compare;

By engaging the second clutch and the third clutch, disengaging the first clutch, the fourth clutch, the fifth clutch, the first brake and the second brake to produce a 7-speed transmission between the input member and the output member Compare;

By engaging the second clutch and the fifth clutch, disengaging the first clutch, the third clutch, the fourth clutch, the first brake and the second brake to produce an 8-speed transmission between the input member and the output member Compare;

By engaging the second clutch and first brake, disengaging the first clutch, third clutch, fourth clutch, fifth clutch and second brake to produce a 9-speed transmission between the input member and the output member Compare.

Optionally, by engaging the fifth clutch and second brake, disengaging the first clutch, second clutch, third clutch, fourth clutch and first brake, between the input member and the output member Creates a reverse gear ratio.

Optionally, the first clutch, the second clutch, the third clutch, the fourth clutch and the fifth clutch are multi-plate wet clutches or jaw clutches.

Optionally, the first brake and the second brake are drum brakes or multi-plate wet brakes.

The nine-speed automatic transmission of the present invention is provided with 3 planetary gear sets and 7 operating elements (5 clutches and 2 brakes). By selectively engaging or disengaging these 7 operating elements, the input member and the output member can Nine forward gear ratios and one reverse gear ratio are produced between them, thereby realizing nine forward gears and one reverse gear of the nine-speed transmission. In this way, the design requirements of nine forward gears and one reverse gear are realized through 3 planetary gear sets and 7 operating elements. Compared with the existing 4-degree-of-freedom 9AT automatic transmission composed of 4 planetary gear sets, the planetary gear set The number and the number of degrees of freedom are reduced by one, which simplifies the transmission system of the nine-speed automatic transmission, which is conducive to reducing the difficulty of product control and compact design, and ultimately reduces product manufacturing costs.

Description of drawings

Fig. 1 is the structural diagram of the nine-speed automatic transmission that the first embodiment of the present invention provides;

Fig. 2 is a schematic diagram of power transmission in the first gear of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 3 is a schematic diagram of the second gear power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 4 is a schematic diagram of power transmission in third gear of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 5 is a schematic diagram of the 4-speed power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 6 is a schematic diagram of the 5-speed power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 7 is a schematic diagram of the 6-speed power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 8 is a schematic diagram of the 7-speed power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 9 is a schematic diagram of eight-speed power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 10 is a schematic diagram of the nine-speed power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 11 is a schematic diagram of reverse gear power transmission of the nine-speed automatic transmission provided by the first embodiment of the present invention;

Fig. 12 is a schematic structural diagram of a nine-speed automatic transmission provided by the second embodiment of the present invention.

The reference signs in the instructions are as follows:

11. Input components; 12. Output components;

21. Transmission housing;

30. The first planetary gear set; 31. The first sun gear; 32. The first planetary gear; 33. The first ring gear; 34. The first planet carrier;

40. The second planetary gear set; 41. The second sun gear; 42. The second planetary gear; 43. The second ring gear; 44. The second planet carrier;

50. The third planetary gear set; 51. The third sun gear; 52. The third planetary gear; 53. The third ring gear; 54. The third planet carrier;

61, the first clutch; 62, the second clutch; 63, the third clutch; 64, the fourth clutch; 65, the fifth clutch;

71. The first brake; 72. The second brake.

detailed description

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, the nine-speed automatic transmission provided by the first embodiment of the present invention includes an input member 11, an output member 12, a transmission housing 21, a first planetary gear set 30, a second planetary gear set 40, a third planetary gear set The gear set 50 , the first clutch 61 , the second clutch 62 , the third clutch 63 , the fourth clutch 64 , the fifth clutch 65 , the first brake 71 and the second brake 72 .

In this embodiment, each planetary gear set is a single star row with internal and external meshing. Specifically:

The first planetary gear set 30 includes a first sun gear 31 , a first planetary gear 32 , a first ring gear 33 , and a first planet carrier 34 . The first sun gear 31 is externally engaged with the first planetary gear 32 for transmission, and the first planetary gear 32 is internally engaged for transmission with the first ring gear 33. The first planetary gear 32 is rotatably supported on the set by rolling or sliding bearings. on the first planetary carrier 34.

The second planetary gear set 40 includes a second sun gear 41 , a second planetary gear 42 , a second ring gear 43 and a second planet carrier 44 . The second sun gear 41 is externally engaged with the second planetary gear 42 for transmission, and the second planetary gear 42 is internally engaged for transmission with the second ring gear 43. The second planetary gear 42 is rotatably supported on the set by rolling or sliding bearings. on the second planetary carrier 44.

The third planetary gear set 50 includes a third sun gear 51 , a third planetary gear 52 , a third ring gear 53 and a third planet carrier 54 . The third sun gear 51 is externally engaged with the third planetary gear 52 for transmission, and the third planetary gear 52 is internally engaged for transmission with the third ring gear 53. The third planetary gear 52 is rotatably supported on the set by rolling or sliding bearings. on the third planetary carrier 54.

As shown in FIG. 1 , the first planet carrier 34 is fixedly connected to the second ring gear 43 , the second planet carrier 44 is fixedly connected to the third ring gear 53 , and the first ring gear 33 is fixed to the output member 12 The second sun gear 41 is fixedly connected to the input member 11 , and the third sun gear 51 is fixedly connected to the transmission case 21 .

As shown in FIG. 1 , the third planet carrier 54 is connected to the output member 12 through the first clutch 61 , and the third planet carrier 54 is connected to the input member 11 through the second clutch 62 , The first sun gear 31 is sequentially connected to the input member 11 through the fifth clutch 65 and the third clutch 63 , and the first planet carrier 34 is connected to the input member 11 through the fourth clutch 64 and the third clutch 63 in sequence. The input member 11 is connected, the first sun gear 31 is connected to the transmission housing 21 through the first brake 71 , and the first planet carrier 34 is connected to the transmission housing 11 through the second brake 72 connect.

In this embodiment, the first clutch 61, the second clutch 62, the third clutch 63, the fourth clutch 64, the fifth clutch 65, the first brake 71 and the second brake 72 are selectively engaged or disengaged, so as to Nine forward gear ratios and one reverse gear ratio result between the input member 11 and the output member 12 .

In this embodiment, the operation logic of the first clutch 61, the second clutch 62, the third clutch 63, the fourth clutch 64, the fifth clutch 65, the first brake 71 and the second brake 72 is referred to the following Table 1:

Table 1

In Table 1, the mark ● indicates that the operating element is engaged, and the blank space indicates that the operating element is separated. k1 , k2 and k3 are characteristic parameters of the planetary gear set 30 , the second planetary gear set 40 and the third planetary gear set 50 respectively, and the characteristic parameters of the planetary gear are equal to the ratio of the number of teeth of the ring gear to the sun gear. That is, k1 is the ratio of the number of teeth of the first ring gear 33 to the first sun gear 31, k2 is the ratio of the number of teeth of the second ring gear 43 to the second sun gear 41, k3 is the ratio of the number of teeth of the third ring gear 53 to the third sun gear 51 ratio of the number of teeth.

In this embodiment, for example, when k1=2.844, k2=2.844, and k3=3.617, the transmission ratios of gears 1 to 9 are 4.907, 2.803, 2.063, 1.611, 1.276, 1, 0.728, 0.664, and 0.539, respectively. Reverse has a gear ratio of -2.844.

Referring to Figures 1-11, under the manipulation logic in Table 1, the power transmission route of the nine-speed automatic transmission is specifically as follows (the lines on the transmission route are thickened).

(1) 1st gear power transmission route

As shown in Figure 2, only the first clutch 61 and the second brake 72 are engaged, the second planetary gear set 40 and the third planetary gear set 50 participate in the power transmission to realize the first gear, and the transmission ratio is (1+k2+k3+k3* k2)/k3. Its power transmission route is: input member 11-second sun gear 41-second planetary gear 42-second planetary carrier 44-third ring gear 53-third planetary gear 52-third planetary carrier 54-first clutch 61 - output member 12 . The reaction force is transmitted to the transmission housing 21 through the second brake 72 and the third sun gear 51 for constant braking.

(2) 2nd gear power transmission route

As shown in Figure 3, only the first clutch 61 and the second brake 71 are engaged, the first planetary gear set 30, the second planetary gear set 40 and the third planetary gear set 50 participate in power transmission to realize the second gear, and the transmission ratio is (1 +k1+k3+k3*k1+k2+k2*k1+k3*k2)/(k3*(1+k1)). Its power transmission route is divided into two routes, route 1: input member 11-second sun gear 41-second planetary gear 42-second planetary carrier 44-third ring gear 53-third planetary gear 52-third planetary carrier 54-first clutch 61-output member 12; route two: input member 11-second sun gear 41-second planetary gear 42-second ring gear 43-first planet carrier 34-first planetary gear 32-first Ring gear 33 - output member 12 . The reaction force is transmitted to the transmission case 21 through the second brake 71 and the third sun gear 51 for constant braking.

(3) 3rd gear power transmission route

As shown in Figure 4, only the first clutch 61, the fourth clutch 64 and the fifth clutch 65 are engaged, the first planetary gear set 30, the second planetary gear set 40 and the third planetary gear set 50 participate in power transmission to realize the third gear, The transmission ratio is (1+k3+k2)/k3. The effect of simultaneous engagement of the fourth clutch 64 and the fifth clutch 65 is to make the first planetary gear set 30 collide. Its power transmission route is divided into two routes, route 1: input member 11-second sun gear 41-second planetary gear 42-second planetary carrier 44-third ring gear 53-third planetary gear 52-third planetary carrier 54-first clutch 61-output member 12; route two: input member 11-second sun gear 41-second planetary gear 42-second ring gear 43-first planet carrier 34-first planetary gear 32-first Ring gear 33 - output member 12 . The reaction force is transmitted to the transmission housing 21 through the constant braking of the third sun gear 51 .

(4) 4th gear power transmission route

As shown in FIG. 5 , only the first clutch 61 , the third clutch 63 and the fifth clutch 65 are engaged, and the first planetary gear set 30 , the second planetary gear set 40 and the third planetary gear set 50 participate in power transmission to realize the fourth gear, The transmission ratio is (1+k1+k3+k3*k1+k2+k2*k1+k3*k2)/(k3*(1+k1+k2)). Its power transmission route is divided into three routes, route 1: input member 11-second sun gear 41-second planetary gear 42-second planetary carrier 44-third ring gear 53-third planetary gear 52-third planetary carrier 54-first clutch 61-output member 12; route two: input member 11-second sun gear 41-second planetary gear 42-second ring gear 43-first planet carrier 34-first planetary gear 32-first Ring gear 33—output member 12; route three: input member 11—third clutch 63—fifth clutch 65—first sun gear 31—first planetary gear 32—first ring gear 33—output member 12. The reaction force is transmitted to the transmission housing 21 through the constant braking of the third sun gear 51 .

(5) 5th gear power transmission route

As shown in Figure 6, only the first clutch 61, the third clutch 63 and the fourth clutch 64 are engaged, the second planetary gear set 40 and the third planetary gear set 50 participate in power transmission to realize the fifth gear, and the transmission ratio is (1+k3 )/k3. When the third clutch 63 and the fourth clutch 64 are simultaneously engaged, the second planetary gear set 40 rotates as a whole. Its power transmission route: input member 11-second sun gear 41-second planetary gear 42-second planetary carrier 44-third ring gear 53-third planetary gear 52-third planetary carrier 54-first clutch 61- Output member 12. The reaction force is transmitted to the transmission housing 21 through the constant braking of the third sun gear 51 .

(6) 6-speed power transmission route

As shown in FIG. 7 , only the first clutch 61 and the second clutch 62 are engaged to directly realize the 6th gear, and its power transmission route is: input member 11 - second clutch 62 - first clutch 61 - output member 12 . It can be seen that the 6th gear is a direct gear, the rotational speed of the input member 11 and the output member 12 are the same, and the transmission ratio is 1.

(7) 7th gear power transmission route

As shown in FIG. 8, only the second clutch 62, the fourth clutch 64 and the fifth clutch 65 are engaged, and the first planetary gear set 30, the second planetary gear set 40 and the third planetary gear set 50 participate in power transmission to realize the 7th gear, The transmission ratio is k3*k2/(1+k2+k3*k2). The effect of simultaneous engagement of the fourth clutch 64 and the fifth clutch 65 is to make the first planetary gear set 30 collide. Its power transmission route is divided into two routes, route 1: input member 11-second sun gear 41-second planetary gear 42-second ring gear 43-first planet carrier 34-first planetary gear 32-first ring gear 33-output member 12; route two: input member 11-second clutch 62-third planetary carrier 54-third planetary gear 52-third ring gear 53-second planetary carrier 44-second planetary gear 42-second The ring gear 43 -the first planet carrier 34 -the first planetary gear 32 -the first ring gear 33 -the output member 12 . The reaction force is transmitted to the transmission housing 21 through the constant braking of the third sun gear 51 .

(8) 8-speed power transmission route

As shown in FIG. 9, only the second clutch 62, the third clutch 63 and the fifth clutch 65 are engaged, and the first planetary gear set 30, the second planetary gear set 40 and the third planetary gear set 50 participate in power transmission to realize the 8th gear, The transmission ratio is k1*k3*k2/(1+k2+k1+k2*k1+k1*k3*k2). Its power transmission route is divided into three routes, route 1: input member 11-second sun gear 41-second planetary gear 42-second ring gear 43-first planet carrier 34-first planetary gear 32-first tooth Ring 33-output member 12; route two: input member 11-third clutch 63-fifth clutch 65-first sun gear 31-first planetary gear 32-first ring gear 33-output member 12; route three: input Component 11-second clutch 62-third planet carrier 54-third planetary gear 52-third ring gear 53-second planet carrier 44-second planetary gear 42-second ring gear 43-first planet carrier 34- First planetary gear 32 -first ring gear 33 -output member 12 . The reaction force is transmitted to the transmission housing 21 through the constant braking of the third sun gear 51 .

(9) 9-speed power transmission route

As shown in Figure 10, only the second clutch 62 and the first brake 71 are engaged, the first planetary gear set 30, the second planetary gear set 40 and the third planetary gear set 50 participate in the power transmission to realize the 9th gear, and the transmission ratio is k1* k3*k2/(1+k2+k3*k2+k1+k2*k1+k1*k3*k2). The power transmission route is divided into two routes, route 1: input member 11--second sun gear 41--second planetary gear 42; route 2: input member 11-second clutch 62-third planet carrier 54-third planet Wheel 52 - third ring gear 53 - second planet carrier 44 - second planetary gear 42 . The power is gathered at the second planetary gear 42 , and then passes through the second ring gear 43 - the first planet carrier 34 - the first planetary gear 32 - the first ring gear 33 - the output member 12 . The reaction force is transmitted to the transmission housing 21 through the first brake 71 and the third sun gear 51 for constant braking.

(10) Reverse power transmission route

As shown in FIG. 11 , only the third clutch 63 , the fifth clutch 65 and the second brake 72 are engaged, and the first planetary gear set 30 participates in power transmission to realize the R gear, and the transmission ratio is -k1. Its power transmission route: input member 11-third clutch 63-fifth clutch 65-first sun gear 31-first planetary gear 32-first ring gear 33-output member 12. The reaction force is transmitted to the transmission case 21 through the second brake 72 .

The function of the clutch is to realize the fixed connection and separation between two components through engagement or separation. The common types are multi-plate wet clutch and dog clutch (Dog Clutch). That is, the first clutch 61 , the second clutch 62 , the third clutch 63 , the fourth clutch 64 and the fifth clutch 65 are multi-plate wet clutches or jaw clutches.

The function of the brake is to realize the connection or separation of the components and the transmission housing through engagement or separation, so as to brake or separate the components. The common types are drum brakes and multi-plate wet brakes. That is, the first brake 71 and the second brake 72 are drum brakes or multi-plate wet brakes.

In addition, referring to FIG. 12, the second embodiment of the present invention also provides another nine-speed automatic transmission. In the second implementation, the first clutch 261, the second clutch 262, the third clutch 263, and the fourth clutch 264 are still provided. , the fifth clutch 265 , the first brake 271 and the second brake 272 .

The difference from the first embodiment shown in FIG. 1 is that the positions of the third clutch 263 , the fourth clutch 264 and the fifth clutch 265 in this embodiment are slightly different.

That is, in this embodiment, the first sun gear is connected to the input member through the fifth clutch 265, the first planet carrier is connected to the input member through the fourth clutch 264, and the third The clutch 263 is connected between the first planet carrier and the first sun gear.

In the second embodiment, the operation logics of the first clutch 261, the second clutch 262, the third clutch 263, the fourth clutch 264, the fifth clutch 265, the first brake 271 and the second brake 272 refer to the following table 2:

Table 2

It can be seen that in the second embodiment, the first clutch 261, the second clutch 262, the third clutch 263, the fourth clutch 264, the fifth clutch 265, the first brake 271 and the second brake 272 are engaged or disengaged in each gear. Different, but the transmission ratio of each gear is the same. For example, when k1=2.844, k2=2.844, and k3=3.617, the transmission ratios of gears 1 to 9 are 4.907, 2.803, 2.063, 1.611, 1.276, 1, 0.728, 0.664, and 0.539, respectively. Reverse has a gear ratio of -2.844.

It can be seen that if these operating elements are excluded, the power transmission routes of each gear in the first embodiment and the second embodiment are the same. That is, in the first embodiment and the second embodiment, the first planetary gear set, the second planetary gear set and the third planetary gear set each component (sun gear, planetary gear, ring gear, planet carrier) status is consistent. That is, in the first embodiment and the second embodiment, the input and output of the first planetary gear set, the second planetary gear set and the third planetary gear set are consistent in each gear.

The nine-speed automatic transmission of the above-mentioned embodiment of the present invention is provided with 3 planetary gear sets and 7 operating elements (5 clutches and 2 brakes). By selectively engaging or disengaging these 7 operating elements, the input member can Nine forward gear ratios and one reverse gear ratio are generated between the output member and the output member, thereby realizing nine forward gears and one reverse gear of the nine-speed transmission. In this way, the design requirements of nine forward gears and one reverse gear are realized through 3 planetary gear sets and 7 operating elements. Compared with the existing 4-degree-of-freedom 9AT automatic transmission composed of 4 planetary gear sets, the planetary gear set The number and the number of degrees of freedom are reduced by one, which simplifies the transmission system of the nine-speed automatic transmission, which is conducive to reducing the difficulty of product control and compact design, and ultimately reduces product manufacturing costs.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a kind of nine speed automatic transmission, it is characterised in that including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets and third planet gear train；First planetary gearsets include first Sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and the first planetary gear external toothing are driven, First planetary gear and the first gear ring Inside gear drive, first planetary gear are rotatably supported on first planet carrier； Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second planet carrier；Second sun Wheel is driven with the second planetary gear external toothing, second planetary gear and the second gear ring Inside gear drive, the second planetary gear rotation Turn to be supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the third line star-wheel, the 3rd gear ring And the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, in the third line star-wheel and the 3rd gear ring Engaged transmission, the third line star-wheel is rotatably supported in the third line carrier；First planet carrier and the second gear ring are consolidated Fixed to be connected, second planet carrier is fixedly linked with the 3rd gear ring, and first gear ring is fixedly linked with output link, and described the Two sun gears are fixedly linked with input link, and the 3rd sun gear is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch, the 5th clutch, the first brake and the second system Dynamic device, the third line carrier is connected by the first clutch with the output link, and the third line carrier passes through institute State second clutch to be connected with the input link, first sun gear passes sequentially through the 5th clutch and the 3rd clutch Device is connected with the input link, first planet carrier pass sequentially through the 4th clutch and the 3rd clutch with it is described defeated Enter component connection, first sun gear is connected by first brake with the case of transmission, first planet Frame is connected by the second brake with the case of transmission；

The first clutch, second clutch, the 3rd clutch, the 4th clutch, the 5th clutch, the first brake and Two brakes are selectively engaged or separated, to produce nine forward gear gearratios between the input link and output link And a back gear ratio.

2. nine speed automatic transmission according to claim 1, it is characterised in that by engaging the first clutch and Two brakes, separate the second clutch, the 3rd clutch, the 4th clutch, the 5th clutch and the first brake, with 1 is produced between the input link and output link and keeps off gearratio；

By engaging the first clutch and the first brake, the second clutch, the 3rd clutch, the 4th clutch are separated Device, the 5th clutch and second brake, gearratio is kept off to produce 2 between the input link and output link；

By engaging the first clutch, the 4th clutch and the 5th clutch, the second clutch, the 3rd clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 3 between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 5th clutch, the second clutch, the 4th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 4 between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 4th clutch, the second clutch, the 5th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 5 between the input link and output link；

By engaging the first clutch and second clutch, the 3rd clutch, the 4th clutch, the 5th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 6 between the input link and output link；

By engaging the second clutch, the 4th clutch and the 5th clutch, the first clutch, the 3rd clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 7 between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 5th clutch, the first clutch, the 4th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 8 between the input link and output link；

By engaging the second clutch and the first brake, the first clutch, the 3rd clutch, the 4th clutch are separated Device, the 5th clutch and second brake, gearratio is kept off to produce 9 between the input link and output link.

3. nine speed automatic transmission according to claim 1 or 2, it is characterised in that by engage the 3rd clutch, 5th clutch and second brake, separate the first clutch, second clutch, the 4th clutch and the first brake, To produce back gear ratio between the input link and output link.

4. nine speed automatic transmission according to claim 1, it is characterised in that the first clutch, second clutch, 3rd clutch, the 4th clutch and the 5th clutch are multiple-piece wet clutch or jaw clutch.

5. nine speed automatic transmission according to claim 1, it is characterised in that first brake and second brake For drum brake or multi-disk wet type brake.

6. a kind of nine speed automatic transmission, it is characterised in that including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets and third planet gear train；First planetary gearsets include first Sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and the first planetary gear external toothing are driven, First planetary gear and the first gear ring Inside gear drive, first planetary gear are rotatably supported on first planet carrier； Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second planet carrier；Second sun Wheel is driven with the second planetary gear external toothing, second planetary gear and the second gear ring Inside gear drive, the second planetary gear rotation Turn to be supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the third line star-wheel, the 3rd gear ring And the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, in the third line star-wheel and the 3rd gear ring Engaged transmission, the third line star-wheel is rotatably supported in the third line carrier；First planet carrier and the second gear ring are consolidated Fixed to be connected, second planet carrier is fixedly linked with the 3rd gear ring, and first gear ring is fixedly linked with output link, and described the Two sun gears are fixedly linked with input link, and the 3rd sun gear is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch, the 5th clutch, the first brake and the second system Dynamic device, the third line carrier is connected by the first clutch with the output link, and the third line carrier passes through institute State second clutch to be connected with the input link, first sun gear passes through the 5th clutch and the input link Connection, first planet carrier is connected by the 4th clutch with the input link, and the 3rd clutch is connected to Between first planet carrier and the first sun gear, first sun gear passes through first brake and the transmission case Body is connected, and first planet carrier is connected by the second brake with the case of transmission；

The first clutch, second clutch, the 3rd clutch, the 4th clutch, the 5th clutch, the first brake and Two brakes are selectively engaged or separated, to produce nine forward gear gearratios between the input link and output link And a back gear ratio.

7. nine speed automatic transmission according to claim 6, it is characterised in that by engaging the first clutch and Two brakes, separate the second clutch, the 3rd clutch, the 4th clutch, the 5th clutch and the first brake, with 1 is produced between the input link and output link and keeps off gearratio；

By engaging the first clutch and the first brake, the second clutch, the 3rd clutch, the 4th clutch are separated Device, the 5th clutch and second brake, gearratio is kept off to produce 2 between the input link and output link；

By engaging the first clutch and the 3rd clutch, the second clutch, the 4th clutch, the 5th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 3 between the input link and output link；

By engaging the first clutch and the 5th clutch, the second clutch, the 3rd clutch, the 4th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 4 between the input link and output link；

By engaging the first clutch and the 4th clutch, the second clutch, the 3rd clutch, the 5th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 5 between the input link and output link；

By engaging the first clutch and second clutch, the 3rd clutch, the 4th clutch, the 5th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 6 between the input link and output link；

By engaging the second clutch and the 3rd clutch, the first clutch, the 4th clutch, the 5th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 7 between the input link and output link；

By engaging the second clutch and the 5th clutch, the first clutch, the 3rd clutch, the 4th clutch are separated Device, the first brake and second brake, gearratio is kept off to produce 8 between the input link and output link；

By engaging the second clutch and the first brake, the first clutch, the 3rd clutch, the 4th clutch are separated Device, the 5th clutch and second brake, gearratio is kept off to produce 9 between the input link and output link.

8. nine speed automatic transmissions according to claim 6 or 7, it is characterised in that by engaging the 5th clutch And second brake, the first clutch, second clutch, the 3rd clutch, the 4th clutch and the first brake are separated, To produce back gear ratio between the input link and output link.

9. nine speed automatic transmission according to claim 6, it is characterised in that the first clutch, second clutch, 3rd clutch, the 4th clutch and the 5th clutch are multiple-piece wet clutch or jaw clutch.

10. nine speed automatic transmission according to claim 6, it is characterised in that first brake and the second braking Device is drum brake or multi-disk wet type brake.