阅读说明：本技术 一种带脱困挡变速系统 (Gear shifting system with escaping gear ) 是由 郝庆军 冯涛 王琳 陆中华 朱学军 于 2021-09-13 设计创作，主要内容包括：本发明提供一种带脱困挡变速系统,通过引入第三离合器,增加一个脱困挡,一旦在遭遇路面凹坑塌陷等意外状况时,可以通过脱困挡提供的扭矩满足脱困状况的需要,保证行车稳定；采用双电机在变速系统两侧对称布置的方案,使得变速系统整体质量布置均衡,接合各轴上动力部件的均衡布置,降低在车辆行驶中的振动及噪音,保证行车安全,延长使用寿命。(The invention provides a speed change system with a escaping gear, wherein a third clutch is introduced to increase an escaping gear, so that once the system encounters unexpected conditions such as road surface pit collapse, the torque provided by the escaping gear can meet the requirements of the escaping condition, and the driving stability is ensured; the scheme that the double motors are symmetrically arranged on the two sides of the speed change system is adopted, so that the overall mass arrangement of the speed change system is balanced, the balanced arrangement of power parts on each shaft is combined, the vibration and noise in the running process of the vehicle are reduced, the running safety is ensured, and the service life is prolonged.)

1. The utility model provides a speed change system is kept off in area stranded which characterized in that: the method comprises the following steps:

a first electric machine (EM 1), the output shaft (1) of the first electric machine (EM 1) being selectively connectable to the transmission system output shaft (3) through a first electric machine input gear pair, or being selectively connectable to the transmission system output shaft (3) through a first transmission gear pair (EGR 1), or being selectively connectable to the transmission system output shaft (3) through a first transmission gear pair (EGR 1) and a second transmission gear pair (EGR 2);

a second electric machine (EM 2), an output shaft (2) of the second electric machine (EM 2) is selectively connected with the output shaft (3) of the speed change system through a second electric machine input gear pair; or the first transmission gear pair (EGR 1) and the second transmission gear pair (EGR 2) can be selectively connected with the output shaft (3) of the speed change system;

a first clutch B (18) disposed on the output shaft (1) of the first electric machine (EM 1) and selectively engaging or disengaging the output shaft (1) of the first electric machine (EM 1) with a gear of the first electric machine input gear pair or selectively engaging or disengaging the output shaft (1) of the first electric machine (EM 1) with a gear of the first transmission gear pair (EGR 1);

a second clutch A (17) disposed on the output shaft (2) of the second electric machine (EM 2) and selectively engaging or disengaging the output shaft (2) of the second electric machine (EM 2) with or from a gear of the second electric machine input gear pair;

a third clutch C (19), said third clutch C (19) being disposed on the transmission output shaft (3) and selectively engaging or disengaging the transmission output shaft (3) with or from the second transfer gear pair (EGR 2).

2. A transmission system with a gear for escaping from stranded according to claim 1, wherein: the first transmission gear pair (EGR 1) comprises a first motor transmission gear (10) which is sleeved on an output shaft (1) of the first motor (EM 1) in an empty mode, a second motor transmission gear (11) which is fixed on an output shaft (2) of the second motor (EM 2) and an output transmission gear (12) which is sleeved on an output shaft (3) of the speed changing system in an empty mode, and the output transmission gear (12) is meshed with the first motor transmission gear (10) and the second motor transmission gear (11).

3. A transmission system with a gear for escaping from stranded according to claim 2, wherein: the second transmission gear pair (EGR 2) is a planetary gear transmission mechanism which comprises a sun gear (13) which is sleeved on the output shaft (3) of the speed change system and is fixedly connected with the output transmission gear (12), a planetary gear (14) which is externally meshed with the sun gear (13), a planetary carrier (15) which can be selectively connected with the output shaft (3) of the speed change system, and a gear ring (16) which is fixed with the outside.

4. A transmission system with escape gear according to any one of claims 1 to 3, characterized in that: the first motor input gear pair comprises a second gear pair (GR 2) located on the left side of the first clutch B (18), the second gear pair (GR 2) comprises a second driving gear (6) and a second driven gear (7), the second driving gear (6) is sleeved on the output shaft (1) of the first motor (EM 1) in an empty mode, the second driven gear (7) is fixed on the output shaft (3) of the speed changing system, and the second driving gear (6) is correspondingly meshed with the second driven gear (7).

5. A transmission system with escape gear according to any one of claims 1 to 3, characterized in that: the second motor input gear pair comprises a first gear pair (GR 1) located to the left of the second clutch A (17) and a third gear pair (GR 3) located to the right of the second clutch A (17);

the first gear pair (GR 1) comprises a first driving gear (4) which is sleeved on the output shaft (2) of the second motor (EM 2) in an empty mode and a first driven gear (5) which is fixed on the output shaft (3) of the speed changing system, and the first driving gear (4) is correspondingly meshed with the first driven gear (5);

the third gear pair (GR 3) comprises a third driving gear (8) which is sleeved on the output shaft (2) of the second motor (EM 2) in an empty mode and a third driven gear (9) which is fixed on the output shaft (3) of the speed changing system, and the third driving gear (8) is meshed with the third driven gear (9) correspondingly.

6. A transmission system with a gear for escaping from stranded according to claim 1, wherein: the first electric machine (EM 1) and the second electric machine (EM 2) are symmetrically arranged on two sides of the speed change system output shaft (3).

7. The belt trapped-escape-gear speed change system according to claim 5, wherein: -said second gear pair (GR 2) being located between said first gear pair (GR 1) and said third gear pair (GR 3) in the direction of extension of said transmission output shaft (3); the first clutch B (18) is located between the second clutch A (17) and the third clutch C (19).

8. A transmission system with escape gear according to any one of claims 1 to 3, characterized in that: the second transmission gear pair (EGR 2) is located further away from the first and second electric machines (EM 1, EM 2) than the first transmission gear pair (EGR 1) in the extension direction of the transmission system output shaft (3).

9. A transmission system with escape gear according to any one of claims 1 to 3, characterized in that: the electric transmission system further comprises a third motor (EM 3), and an output shaft of the third motor (EM 3) is fixedly connected with the output shaft (3) of the speed changing system and is coaxially arranged with the output shaft (3) of the speed changing system.

10. A transmission system with escape gear according to any one of claims 1 to 3, characterized in that: the working positions of the clutches under each gear of the speed change system are as follows:

1) in neutral gear, the first clutch B is centered, the second clutch A is centered, and the third clutch C is not engaged;

2) when the gear is out of the way, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is centered, and the third clutch C is engaged;

3) when the gear 1 is shifted, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is engaged with the gear of the second motor input gear pair on one side, and the third clutch C is not engaged;

3) when the gear 2 is shifted, the first clutch B is engaged with the gear of the first motor input gear pair on one side, the second clutch A is engaged with the gear of the second motor input gear pair on one side, and the third clutch C is not engaged;

4) when the gear 3 is shifted, the first clutch B is engaged with the gear of the first motor input gear pair on one side, the second clutch A is engaged with the gear of the second motor input gear pair on the other side, and the third clutch C is not engaged;

5) in the 4-gear stage, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is engaged with the gear of the second motor input gear pair on the other side, and the third clutch C is not engaged.

Technical Field

The invention relates to the field of new energy transmissions, in particular to a transmission system with a escaping gear.

Background

In the prior art, different speed ratio adjustment is usually realized through setting a plurality of gears, and once the multi-motor transmission encounters unexpected conditions such as road surface pit collapse, the torque provided by the conventional speed ratio cannot meet the requirements of the escaping condition; on the other hand, the existing double motors or more motors are often arranged on the same side of the speed change system, the occupied space is small, the structure is compact, meanwhile, the overall mass of the speed change system is unbalanced, vibration and noise are increased during the running of the vehicle, and the driving safety and the service life are influenced.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a speed change system with a gear-out-of-position function.

The technical scheme provided by the invention is as follows: a belt bailed shift system comprising:

a first electric machine (EM 1), the output shaft (1) of the first electric machine (EM 1) being selectively connectable to the transmission system output shaft (3) through a first electric machine input gear pair, or being selectively connectable to the transmission system output shaft (3) through a first transmission gear pair (EGR 1), or being selectively connectable to the transmission system output shaft (3) through a first transmission gear pair (EGR 1) and a second transmission gear pair (EGR 2);

a second electric machine (EM 2), an output shaft (2) of the second electric machine (EM 2) is selectively connected with the output shaft (3) of the speed change system through a second electric machine input gear pair; or the first transmission gear pair (EGR 1) and the second transmission gear pair (EGR 2) can be selectively connected with the output shaft (3) of the speed change system;

a first clutch B (18) disposed on the output shaft (1) of the first electric machine (EM 1) and selectively engaging or disengaging the output shaft (1) of the first electric machine (EM 1) with a gear of the first electric machine input gear pair or selectively engaging or disengaging the output shaft (1) of the first electric machine (EM 1) with a gear of the first transmission gear pair (EGR 1);

a second clutch A (17) disposed on the output shaft (2) of the second electric machine (EM 2) and selectively engaging or disengaging the output shaft (2) of the second electric machine (EM 2) with or from a gear of the second electric machine input gear pair;

a third clutch C (19), said third clutch C (19) being disposed on the transmission output shaft (3) and selectively engaging or disengaging the transmission output shaft (3) with or from the second transfer gear pair (EGR 2).

Further, the first transmission gear pair (EGR 1) comprises a first motor transmission gear (10) which is sleeved on the output shaft (1) of the first motor (EM 1) in an empty mode, a second motor transmission gear (11) which is fixed on the output shaft (2) of the second motor (EM 2) in an empty mode, and an output transmission gear (12) which is sleeved on the output shaft (3) of the speed changing system in an empty mode, and the output transmission gear (12) is meshed with the first motor transmission gear (10) and the second motor transmission gear (11).

Furthermore, the second transmission gear pair (EGR 2) is a planetary gear transmission mechanism, which includes a sun gear (13) that is hollow on the transmission system output shaft (3) and is fixedly connected with the output transmission gear (12), a planetary gear (14) that is externally engaged with the sun gear (13), a planetary carrier (15) that is selectively connected with the transmission system output shaft (3), and a ring gear (16) that is externally fixed.

Furthermore, the first motor input gear pair comprises a second gear pair (GR 2) positioned on the left side of the first clutch B (18), the second gear pair (GR 2) comprises a second driving gear (6) which is freely sleeved on the output shaft (1) of the first motor (EM 1) and a second driven gear (7) which is fixed on the output shaft (3) of the speed change system, and the second driving gear (6) is correspondingly meshed with the second driven gear (7).

Further, the second motor input gear pair includes a first gear pair (GR 1) located on the left side of the second clutch a (17) and a third gear pair (GR 3) located on the right side of the second clutch a (17);

the first gear pair (GR 1) comprises a first driving gear (4) which is sleeved on the output shaft (2) of the second motor (EM 2) in an empty mode and a first driven gear (5) which is fixed on the output shaft (3) of the speed changing system, and the first driving gear (4) is correspondingly meshed with the first driven gear (5);

the third gear pair (GR 3) comprises a third driving gear (8) which is sleeved on the output shaft (2) of the second motor (EM 2) in an empty mode and a third driven gear (9) which is fixed on the output shaft (3) of the speed changing system, and the third driving gear (8) is meshed with the third driven gear (9) correspondingly.

Further, the first electric machine (EM 1) and the second electric machine (EM 2) are symmetrically arranged on both sides of the transmission system output shaft (3).

Further, in the extension direction of the transmission system output shaft (3), the second gear pair (GR 2) is located between the first gear pair (GR 1) and the third gear pair (GR 3); the first clutch B (18) is located between the second clutch A (17) and the third clutch C (19).

Further, in the extension direction of the transmission system output shaft (3), the second transmission gear pair (EGR 2) is located further away from the first and second electric machines (EM 1, EM 2) than the first transmission gear pair (EGR 1).

Further, the electric transmission further comprises a third motor (EM 3), and an output shaft of the third motor (EM 3) is fixedly connected with the output shaft (3) of the speed change system and is arranged coaxially with the output shaft (3) of the speed change system.

Further, the working positions of the clutches under each gear of the speed changing system are as follows:

1) in neutral gear, the first clutch B is centered, the second clutch A is centered, and the third clutch C is not engaged;

2) when the gear is out of the way, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is centered, and the third clutch C is engaged;

3) when the gear 1 is shifted, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is engaged with the gear of the second motor input gear pair on one side, and the third clutch C is not engaged;

3) when the gear 2 is shifted, the first clutch B is engaged with the gear of the first motor input gear pair on one side, the second clutch A is engaged with the gear of the second motor input gear pair on one side, and the third clutch C is not engaged;

4) when the gear 3 is shifted, the first clutch B is engaged with the gear of the first motor input gear pair on one side, the second clutch A is engaged with the gear of the second motor input gear pair on the other side, and the third clutch C is not engaged;

5) in the 4-gear stage, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is engaged with the gear of the second motor input gear pair on the other side, and the third clutch C is not engaged.

Compared with the prior art, the invention has the following beneficial effects:

1) the invention provides a speed change system with a escaping gear, wherein a third clutch C is introduced to increase an escaping gear, so that once an accident condition such as collapse of a road surface pit is met, the requirement of the escaping condition can be met through the torque provided by the escaping gear, and the driving stability is ensured.

2) The invention provides a transmission system with a gear for escaping from trouble, which adopts a scheme that double motors are symmetrically arranged in the transmission system, so that the overall quality of the transmission system is balanced, and the transmission system is combined with the balanced arrangement of power parts on each shaft, thereby reducing the vibration and noise during the running of a vehicle, ensuring the running safety and prolonging the service life.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

[ EXAMPLE 1 ]

Fig. 1 shows a transmission system with a gear for escaping from a stranded state according to embodiment 1 of the present invention, which includes:

and the output shaft 1 of the first electric motor EM1, the output shaft of the first electric motor EM1 can be selectively connected with the transmission system output shaft 3 through a first electric motor input gear pair on one side, or can be selectively connected with the transmission system output shaft 3 through a first transmission gear pair EGR1 on the other side, or can be selectively connected with the transmission system output shaft 3 through a first transmission gear pair EGR1 and a second transmission gear pair EGR2 on the other side. Specifically, as a further preferable solution of the present embodiment, the first motor input gear pair includes a second gear pair GR2 located on the left side of the first clutch B18, the second gear pair GR2 includes a second driving gear 6 that is idly sleeved on the output shaft 1 of the first motor EM1 and a second driven gear 7 that is fixed to the transmission system output shaft 3, and the second driving gear 6 is correspondingly engaged with the second driven gear 7. The second gear pair GR2 is used to transmit the output power of the first electric machine EM1 to the transmission system output shaft 3. Specifically, as a further preferable solution of the present embodiment, the first gear pair EGR1 includes a first motor transmission gear 10 that is idly sleeved on the output shaft 1 of the first motor EM1, a second motor transmission gear 11 that is fixed on the output shaft 2 of the second motor EM2, and an output transmission gear 12 that is idly sleeved on the output shaft 3 of the speed change system, and the output transmission gear 12 is engaged with the first motor transmission gear 10 and the second motor transmission gear 11; the first transfer gear pair EGR1 is used to transfer the output power of the first electric machine EM1 to the transmission system output shaft 3.

The technical scheme provided by the embodiment further comprises a second electric motor EM2, wherein an output shaft 2 of the second electric motor EM2 is selectively connected with a transmission system output shaft 3 through second electric motor input gear pairs on two sides; or the other side first transmission gear pair EGR1 and the second transmission gear pair EGR2 can be selectively connected with the output shaft 3 of the speed change system.

Specifically, as a further preferable aspect of the present embodiment, the second motor input gear pair includes a first gear pair GR1 located on the left side of the second clutch a17 and a third gear pair GR3 located on the right side of the second clutch a 17; the first gear pair GR1 comprises a first driving gear 4 which is sleeved on the output shaft 2 of the second motor EM2 in an empty mode and a first driven gear 5 which is fixed on the output shaft 3 of the speed changing system, and the first driving gear 4 is correspondingly meshed with the first driven gear 5; the third gear pair GR3 comprises a third driving gear 8 that is freely sleeved on the output shaft 2 of the second electric motor EM2 and a third driven gear 9 that is fixed on the output shaft 3 of the speed change system, and the third driving gear 8 is correspondingly engaged with the third driven gear 9; the first gear pair GR1 and the third gear pair GR3 are used for transmitting the output power of the second motor EM2 to the output shaft 3 of the speed change system; specifically, as a further preferable solution of this embodiment, the second transmission gear pair EGR2 is a planetary gear transmission mechanism, and the planetary gear transmission mechanism includes a sun gear 13 that is idly sleeved on the output shaft 3 of the transmission system and is fixedly connected with the output transmission gear 12, a planetary gear 14 that is externally engaged with the sun gear 13, a planet carrier 15 that is selectively connected with the output shaft 3 of the transmission system, and a ring gear 16 that is externally fixed; the planetary gear transmission mechanism is used for escaping from the trapped gear, and the output power of the first electric machine EM1 and the output power of the second electric machine EM2 are jointly transmitted to the output shaft 3 of the speed changing system through the engagement of the planet carrier 15 and the third clutch C19 to form a large speed ratio for escaping from the trapped vehicle.

A first clutch B18, the first clutch B18 is disposed on the output shaft 1 of the first electric machine EM1 and can selectively engage or disengage the output shaft 1 of the first electric machine EM1 with or from the gear of the first electric machine input gear pair on one side, or can selectively engage or disengage the output shaft 1 of the first electric machine EM1 with or from the gear of the first transfer gear pair EGR1 on the other side.

And a second clutch a17, which is a second clutch a17, is disposed on the output shaft 2 of the second electric machine EM2 and selectively engages or disengages the output shaft 2 of the second electric machine EM2 with or from the gears of the second electric machine input gear pairs on both sides.

A third clutch C19, said third clutch C19 being provided at the transmission output shaft 3 and selectively engaging or disengaging the transmission output shaft 3 with the one-side second transmission gear pair EGR 2.

Specifically, as a further preferable scheme of this embodiment, the first electric machine EM1 and the second electric machine EM2 are symmetrically arranged, so that the overall mass arrangement of the transmission system is balanced, the balanced arrangement of power components on each shaft is combined, the vibration and noise during the vehicle running are reduced, the driving safety is ensured, and the service life is prolonged.

Specifically, as a further preferable aspect of the present embodiment, in the extending direction of the transmission system output shaft 3, the second gear pair GR2 is located between the first gear pair GR1 and the third gear pair GR 3; the first clutch B18 is located between the second clutch A17 and the third clutch C19, so that the uniform distribution of each power component on each shaft is further ensured, the structure is compact, the internal space is simplified, and the whole quality balance is ensured.

Specifically, as a further preferable solution of this embodiment, in the extending direction of the transmission system output shaft 3, the second transmission gear pair EGR2 is located farther from the first electric machine EM1 and the second electric machine EM2 than the first transmission gear pair EGR1, so as to further ensure the uniform distribution of the power components on the shafts, ensure a compact structure and a simplified internal space, ensure the balance of the overall quality, and facilitate the shifting action of the third clutch C19.

[ EXAMPLE 2 ]

Fig. 2 shows a second embodiment of the transmission system with a gear-shifting out of position according to the present invention, which is different from the first embodiment only in that the transmission system further includes a third electric machine EM3, and an output shaft of the third electric machine EM3 is fixedly connected to the transmission system output shaft 3 and is coaxially disposed with the transmission system output shaft 3, so that the power output of the third electric machine is increased during the gear-shifting out of position, and during the normal driving, thereby increasing the power, ensuring that the power is not interrupted during the gear-shifting out of position and during the gear-shifting, and the power transmission is stable.

Specifically, as a further preferable scheme of the present embodiment, the operating positions of the clutches in each gear of the transmission system in the 1 st and 2 nd embodiments are (as shown in the following table 1):

1) in neutral gear, the first clutch B is centered, the second clutch A is centered, and the third clutch C is not engaged;

2) in the trapped gear (namely, LOW gear in table 1), the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch a is centered, and the third clutch C is engaged; at the moment, the second transmission gear pair is jointed with the output shaft, and the first motor and the second motor jointly output power to be output from the output shaft;

3) when the gear 1 is shifted, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is engaged with the gear of the second motor input gear pair on one side, and the third clutch C is not engaged; at the moment, the second transmission gear pair is not jointed with the output shaft, and the output power of the first motor passes through the first transmission gear pair and then is output together with the second motor through the first gear pair from the output shaft;

3) when the gear 2 is shifted, the first clutch B is engaged with the gear of the first motor input gear pair on one side, the second clutch A is engaged with the gear of the second motor input gear pair on one side, and the third clutch C is not engaged; at the moment, the second transmission gear pair is not jointed with the output shaft, the output power of the first motor is output from the output shaft through the second gear pair, and the output power of the second motor is output from the output shaft through the first gear pair;

4) when the gear 3 is shifted, the first clutch B is engaged with the gear of the first motor input gear pair on one side, the second clutch A is engaged with the gear of the second motor input gear pair on the other side, and the third clutch C is not engaged; at the moment, the second transmission gear pair is not jointed with the output shaft, the output power of the first motor is output from the output shaft through the second gear pair, and the output power of the second motor is output from the output shaft through the third gear pair;

5) in the 4-gear state, the first clutch B is engaged with the gear of the first transmission gear pair on the other side, the second clutch A is engaged with the gear of the second motor input gear pair on the other side, and the third clutch C is not engaged; at the moment, the second transmission gear pair is not jointed with the output shaft, and the output power of the first motor passes through the first transmission gear pair and then is output together with the second motor through the third gear pair from the output shaft.

TABLE 1 EXAMPLES OF OPERATING POSITIONS OF CLUTCH IN VARIABLE-SPEED SYSTEM IN VARIABLE-SPEED GEAR

Note: ● indicates the current position of each clutch; l represents left engagement; r represents a right bond; indicating engagement and N indicates a centered position (i.e., not engaged).

The operating positions of the clutches in each gear of the transmission system according to embodiment 2 are the same as those in embodiment 1, except that the third electric machine EM3 always outputs power through the transmission system output shaft 3 in each gear.

And at least one motor is always kept to output power in the gear shifting process, so that the continuous power output in the gear shifting process is uninterrupted.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.