CN220600360U

CN220600360U - Transmission, power system and working machine

Info

Publication number: CN220600360U
Application number: CN202322304487.XU
Authority: CN
Inventors: 赵海滨; 王昌儒; 吴启帆
Original assignee: Suote Transmission Equipment Co Ltd
Current assignee: Suote Transmission Equipment Co Ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-03-15
Anticipated expiration: 2033-08-25

Abstract

The utility model relates to the field of working machines, and provides a transmission, a power system and a working machine. The transmission includes: a housing; the intermediate shaft is rotatably arranged on the shell and is used for being connected with the motor; the planetary gear is arranged between the sun gear and the gear ring, is rotationally connected with the planetary carrier, is selectively connected with or separated from the intermediate shaft through the clutch, and is used for being connected with the travelling mechanism. The transmission has only three states of brake on and clutch off, brake off and clutch on and brake and clutch off, and has fewer gear numbers, so that the defects caused by excessive gear numbers of the transmission in the prior art can be reduced or improved, and the transmission has simple and compact structure and smaller weight and size.

Description

Transmission, power system and working machine

Technical Field

The utility model relates to the technical field of working machines, in particular to a transmission, a power system and a working machine.

Background

General working machines such as loaders and excavators are used in a wide variety of fields, such as farm field renovation, engineering construction, factories and mines, and ports. At present, the mainstream working machines in China still adopt the traditional internal combustion engine as power, and the transmission mode is hydraulic mechanical transmission and hydraulic transmission, and the disadvantage of the traditional internal combustion engine is poor fuel economy and high pollution emission.

The working machine using electric energy as energy source and using the motor as power has the advantages of strong load adaptability, convenient operation, energy saving, environmental protection and the like. A transmission is a mechanism for changing the rotational speed and torque from an electric machine, which is capable of fixing or shifting the transmission ratio of an output shaft and an input shaft, and is one of the core transmission members of an electric work machine.

The inventors have found that for relatively high speed motors, fewer gear steps are required for the transmission, whereas prior art electric work machines typically resort to the original full parallel shaft type transmission of the work machine. The original speed changer is mainly used for adapting the fuel oil engine, has more gears and complex structure, and causes higher failure rate and poorer stability of the speed changer. In addition, the gear is too many, and the frequency of shifting increases, leads to the motor idle time to increase, easily causes the energy consumption extravagant. Accordingly, there is a need to provide a transmission having a small number of gear steps and a simple and compact structure.

Disclosure of Invention

The utility model provides a transmission, a power system and a working machine, which are used for solving or improving the defect of more gear numbers of the transmission in the prior art and realizing the effect of reducing the gear numbers of the transmission.

The present utility model provides a transmission comprising:

a housing;

the intermediate shaft is rotatably arranged on the shell and is used for being connected with the motor;

the planetary gear is arranged between the sun gear and the gear ring, and is rotationally connected with the planetary carrier, the planetary carrier is selectively connected with or separated from the intermediate shaft through the clutch, and the planetary carrier is used for being connected with a running mechanism.

According to the transmission provided by the utility model, the transmission further comprises an input shaft and a first gear set, the input shaft is rotatably arranged on the shell, the input shaft is connected with the intermediate shaft through the first gear set, the input shaft is used for being connected with the motor, and the first gear set is used for transmitting the rotation speed of the input shaft to the intermediate shaft after the rotation speed of the input shaft is reduced.

According to the transmission provided by the utility model, the transmission further comprises an output shaft and a second gear set, the output shaft is rotatably arranged on the shell, the output shaft is connected with the planet carrier through the second gear set, the output shaft is used for being connected with the travelling mechanism, and the second gear set is used for transmitting the rotation speed of the planet carrier to the output shaft after being reduced.

According to the transmission provided by the utility model, the gear ring is connected with the brake through a spline, and the brake is connected with the shell through the spline;

and/or the intermediate shaft is connected with the clutch through a spline, and the clutch is connected with the planet carrier through a spline.

According to the transmission provided by the utility model, the brake is a normally open brake, and the clutch is a normally open clutch.

According to the transmission provided by the utility model, the sun gear is connected with the intermediate shaft through a spline.

According to the transmission provided by the utility model, the transmission further comprises a first output flange and a second output flange, and the first output flange and the second output flange are arranged on the output shaft.

The utility model also provides a power system which comprises a motor and the speed changer, wherein the motor shaft of the motor is connected with the speed changer.

According to the power system provided by the utility model, the number of the motors is at least two, and the motor shafts of at least two motors are sequentially connected in series and connected with the transmission.

The present utility model also provides a work machine comprising a transmission as described above or a power system as described above.

The transmission provided by the utility model can realize gear switching by switching states of the brake and the clutch.

In first gear, the brake connects the gear ring and the housing, i.e. the gear ring is fixed relative to the housing, and the clutch disengages the planet carrier from the intermediate shaft. The power provided by the motor is output to the downstream travelling mechanism through the intermediate shaft, the sun gear, the planet gears and the planet carrier in sequence. In first gear, the speed is reduced through the planetary mechanism, and the speed changer has a larger reduction ratio.

In the reverse gear, the brake is connected with the gear ring and the shell, namely the gear ring is relatively fixed with the shell, the clutch enables the planet carrier to be separated from the intermediate shaft, the motor rotates reversely, and power provided by the motor is sequentially output to the downstream travelling mechanism through the intermediate shaft, the sun gear, the planet gears and the planet carrier. Thus, reverse gear can be realized through motor reverse rotation, and an independent reverse gear unit is not required to be arranged, so that the structure of the transmission is simpler.

In the second gear, the brake enables the gear ring to be separated from the shell, and the clutch is connected with the planet carrier and the intermediate shaft, namely the planet carrier and the intermediate shaft are relatively fixed. The power provided by the motor is output to the downstream travelling mechanism through the intermediate shaft and the planet carrier in sequence. In second gear, the speed changer is not decelerated by the planetary mechanism, so the speed reduction ratio relative to the last state is smaller, the rotating speed of the output of the speed changer is relatively high, and the working machine can quickly travel.

In neutral, the transmission is in a neutral state under the condition that the brake disengages the ring gear from the housing and the clutch disengages the carrier from the intermediate shaft, and the power of the motor is not output to the running mechanism downstream through the transmission.

The transmission provided by the utility model can realize gear shifting by switching the states of the brake and the clutch, and has three states of brake on and clutch off, brake off and clutch on and brake and clutch off, so that the gear number of the transmission is small, the defects caused by excessive gear number of the transmission in the prior art can be reduced or improved, the structure of the transmission is simple and compact, and the weight and the size are smaller.

The power system and the working machine provided by the utility model comprise the transmission in the utility model, so that all the advantages of the transmission are simultaneously included.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a power system provided in some embodiments of the utility model.

Reference numerals:

1. a housing; 2. an input shaft; 3. a first drive gear; 4. an intermediate shaft; 5. a first driven gear; 6. a sun gear; 7. a planet wheel; 8. a planet carrier; 9. a gear ring; 10. a brake; 11. a clutch; 12. a second drive gear; 13. an output shaft; 14. a second driven gear; 15. a first output flange; 16. a second output flange; 17. and a motor.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The transmission provided in the embodiment of the utility model is described below with reference to fig. 1.

Specifically, the transmission includes a housing 1, an intermediate shaft 4, a sun gear 6, planetary gears 7, a carrier 8, a ring gear 9, a brake 10, and a clutch 11.

Wherein, the shell 1 can be made of aluminum alloy materials, thereby reducing the weight of the transmission and improving the structural strength of the transmission.

The intermediate shaft 4 is rotatably mounted to the housing 1. Specifically, the intermediate shaft 4 is rotatably mounted inside the housing 1. The intermediate shaft 4 is intended to be connected to the electric motor 17, in particular the intermediate shaft 4 may be connected directly to the electric motor 17, or the intermediate shaft 4 may be connected indirectly to the electric motor 17. The indirect connection of the intermediate shaft 4 to the electric motor 17 is described in detail below.

The sun gear 6 is mounted to the intermediate shaft 4, in particular, the sun gear 6 is fixed relative to the intermediate shaft 4 so that both can rotate synchronously. The ring gear 9 is arranged on the outside of the sun gear 6, and a distance for installing the planet gears 7 is arranged between the ring gear 9 and the sun gear 6. The ring gear 9 is selectively connected to or disconnected from the housing 1 by a brake 10, specifically, when the brake 10 connects the ring gear 9 and the housing 1, the ring gear 9 is fixed relative to the housing 1, and when the brake 10 disconnects the ring gear 9 from the housing 1, the ring gear 9 can rotate relative to the housing 1.

The planetary gear 7 is provided between the sun gear 6 and the ring gear 9, and both sides of the planetary gear 7 are engaged with the sun gear 6 and the ring gear 9, respectively. The planet wheel 7 is rotatably connected to the planet carrier 8, i.e. the planet wheel 7 is rotatably mounted to the planet carrier 8. Alternatively, the number of planet wheels 7 is three or five. The planet carrier 8 is selectively connected to or disconnected from the intermediate shaft 4 by a clutch 11, specifically, when the clutch 11 connects the planet carrier 8 to the intermediate shaft 4, the planet carrier 8 is fixed relative to the intermediate shaft 4, and when the clutch 11 disconnects the planet carrier 8 from the intermediate shaft 4, the planet carrier 8 can rotate relative to the intermediate shaft 4. The planet carrier 8 is intended to be connected to the running gear, alternatively the planet carrier 8 is connected directly to the running gear, or the planet carrier 8 may be connected indirectly to the running gear. The form of indirect connection of the planet carrier 8 to the running gear is described in more detail below.

The transmission provided in the embodiment of the utility model can realize shift switching by switching the states of both the brake 10 and the clutch 11.

In first gear, the brake 10 connects the ring gear 9 and the housing 1, i.e. the ring gear 9 is fixed relative to the housing 1, and the clutch 11 disengages the planet carrier 8 from the intermediate shaft 4. The power provided by the motor 17 is sequentially output to a downstream travelling mechanism through the intermediate shaft 4, the sun gear 6, the planet gears 7 and the planet carrier 8. In first gear, the speed is reduced through the planetary mechanism, and the speed changer has a larger reduction ratio.

In reverse gear, the brake 10 connects the ring gear 9 and the housing 1, that is, the ring gear 9 is relatively fixed to the housing 1, the clutch 11 disengages the carrier 8 from the intermediate shaft 4, the motor 17 reverses, and the power provided by the motor 17 is sequentially output to the downstream travelling mechanism through the intermediate shaft 4, the sun gear 6, the planet gears 7 and the carrier 8. Thus, reverse gear can be realized through reversing of the motor 17, and an independent reverse gear unit is not required, so that the structure of the transmission is simpler.

In second gear, the brake 10 disengages the ring gear 9 from the housing 1, and the clutch 11 connects the carrier 8 with the intermediate shaft 4, i.e. the carrier 8 is fixed relative to the intermediate shaft 4. The power provided by the motor 17 is output to a downstream travelling mechanism through the intermediate shaft 4 and the planet carrier 8 in sequence. In second gear, the speed changer is not decelerated by the planetary mechanism, so the speed reduction ratio relative to the last state is smaller, the rotating speed of the output of the speed changer is relatively high, and the working machine can quickly travel.

In neutral, the brake 10 disengages the ring gear 9 from the housing 1, and the clutch 11 disengages the carrier 8 from the intermediate shaft 4, the transmission is in a neutral state, and the power of the motor 17 is not output to the running mechanism downstream through the transmission.

With the arrangement, the transmission provided by the utility model can realize gear shifting by switching the states of the brake 10 and the clutch 11, and the transmission has only three states of brake 10 being connected and clutch 11 being disconnected, brake 10 being disconnected and clutch 11 being connected and brake 10 and clutch 11 being disconnected, so that the gear number of the transmission is small, the defect caused by excessive gear number of the transmission in the prior art can be reduced or improved, and the transmission is simple and compact in structure and smaller in weight and size.

In some embodiments provided by the present utility model, the transmission further comprises an input shaft 2 and a first gear set. Wherein the input shaft 2 is rotatably mounted to the housing 1, the input shaft 2 being connected to the intermediate shaft 4 by a first gear set. The input shaft 2 is intended to be connected to an electric motor 17 and the first gear set is intended to reduce the rotational speed of the input shaft 2 and to transmit it to the intermediate shaft 4. I.e. the intermediate shaft 4 is indirectly connected to the electric motor 17 via the first gear set and the input shaft 2, in particular the motor shaft of the electric motor 17 is connected to the input shaft 2, the electric motor 17 providing power to the intermediate shaft 4 via the input shaft 2, the first gear set.

In this embodiment, by providing the first gear set for reducing speed between the input shaft 2 and the intermediate shaft 4, the reduction ratio of the transmission can be further increased without increasing the gear, so that the power system formed by the transmission and the high-speed motor with smaller size provided in the embodiment of the utility model can achieve the power effect of the power system formed by the large-size motor and the gearbox with smaller reduction ratio, and the comprehensive cost of the power system is lower.

Optionally, the first gear set comprises a first driving gear 3 and a first driven gear 5. The first driving gear 3 is disposed on the input shaft 2, the first driven gear 5 is disposed on the intermediate shaft 4, and the number of teeth of the first driven gear 5 is greater than the number of teeth of the first driving gear 3. So set up, first gear train is one-level gear reduction mechanism, and its structure is comparatively simple. Of course, the first gear set may also be a two-stage gear reduction mechanism or a multi-stage gear reduction mechanism.

Alternatively, the first driving gear 3 may be keyed to the input shaft 2, or the first driving gear 3 may be provided as an integral structure with the input shaft 2, i.e. the first driving gear 3 and the input shaft 2 form a gear shaft. For example, the first drive gear 3 and the input shaft 2 are of a cast integral structure, a forged integral structure, or a welded integral structure.

In some embodiments provided by the present utility model, the transmission further comprises an output shaft 13 and a second gear set. Wherein the output shaft 13 is rotatably mounted to the housing 1, the output shaft 13 being connected to the planet carrier 8 via a second gear set. The output shaft 13 is for connection to a running gear and the second gear set is for reducing the rotational speed of the planet carrier 8 and transmitting it to the output shaft 13. I.e. the planet carrier 8 is indirectly connected to the running gear via the second gear set and the output shaft 13, in particular the power of the planet carrier 8 is in turn transmitted via the second gear set and the output shaft 13 to the running gear downstream.

In this embodiment, by arranging the second gear set for speed reduction between the planet carrier 8 and the intermediate shaft 4, the reduction ratio of the transmission can be further increased without increasing the gear, so that the power system formed by the transmission and the high-speed motor with smaller size provided by the embodiment of the utility model can achieve the power effect of the power system formed by the large-size motor and the gearbox with small reduction ratio, and the comprehensive cost of the power system is lower.

Optionally, the second gear set includes a second driving gear 12 and a second driven gear 14. The second driving gear 12 is disposed on the planet carrier 8, the second driven gear 14 is disposed on the output shaft 13, and the number of teeth of the second driven gear 14 is greater than that of the second driving gear 12. So set up, the second gear train is one-level gear reduction mechanism, and its structure is comparatively simple. Of course, the second gear set may also be a two-stage gear reduction mechanism or a multi-stage gear reduction mechanism.

In some embodiments provided by the present utility model, the ring gear 9 is connected to the brake 10 by a spline, and the brake 10 is connected to the housing 1 by a spline. Specifically, a rotating portion of the brake 10, for example, a friction plate is connected to the ring gear 9 by a spline, and a braking portion of the brake 10 is connected to the housing 1 by a spline. By this arrangement, the brake 10 and the ring gear 9 and the brake 10 and the housing 1 have high connection strength, and can bear large loads.

In some embodiments provided by the present utility model, intermediate shaft 4 is splined to clutch 11, and clutch 11 is splined to carrier 8. Specifically, one side of the clutch 11 is connected to the intermediate shaft 4 by a spline, and the other side of the clutch 11 is connected to the carrier 8 by a spline. The clutch 11 and the intermediate shaft 4 and the clutch 11 and the planet carrier 8 have high connection strength, and can bear large load.

In some embodiments provided by the present utility model, brake 10 is a normally open brake and clutch 11 is a normally open clutch. So arranged, the transmission is in a neutral state when no power is input to both the brake 10 and the clutch 11.

In some embodiments provided by the present utility model, the sun gear 6 is connected to the intermediate shaft 4 by splines. So arranged, the strength of the connection between the sun gear 6 and the intermediate shaft 4 is higher.

In some embodiments provided by the present utility model, the transmission further comprises a first output flange 15 and a second output flange 16. The first output flange 15 and the second output flange 16 are both arranged on the output shaft 13, and the first output flange 15 and the second output flange 16 are respectively connected with a front axle assembly and a rear axle assembly of the working machine.

In some embodiments provided by the utility model, the input shaft 2 and the output shaft 13 are sequentially arranged along the height direction of the transmission, and the input shaft 2 is arranged above the output shaft 13, so that the installation position of the motor 17 is higher, and the working machine has higher wading depth.

Of course, the technical means in the above embodiments can also be combined with each other, for example, a transmission provided in the embodiment of the present utility model includes a housing 1, an intermediate shaft 4, a sun gear 6, a planet wheel 7, a planet carrier 8, a ring gear 9, a brake 10, a clutch 11, an input shaft 2, a first gear set, an output shaft 13, and a second gear set.

The intermediate shaft 4 is rotatably mounted to the housing 1. The input shaft 2 is rotatably mounted to the housing 1, and the input shaft 2 is connected to the intermediate shaft 4 via a first gear set. The input shaft 2 is intended to be connected to an electric motor 17 and the first gear set is intended to reduce the rotational speed of the input shaft 2 and to transmit it to the intermediate shaft 4. Specifically, a motor shaft of the motor 17 is connected to the input shaft 2, and the motor 17 provides power to be transmitted to the intermediate shaft 4 via the input shaft 2 and the first gear set. The first gear set includes a first driving gear 3 and a first driven gear 5 meshed with the first driving gear 3. The first driving gear 3 is disposed on the input shaft 2, the first driven gear 5 is disposed on the intermediate shaft 4, and the number of teeth of the first driven gear 5 is greater than the number of teeth of the first driving gear 3.

The sun gear 6 is mounted to the intermediate shaft 4. The ring gear 9 is arranged on the outside of the sun gear 6, and a distance for installing the planet gears 7 is arranged between the ring gear 9 and the sun gear 6. The ring gear 9 is selectively connected to or disconnected from the housing 1 by a brake 10. The planetary gear 7 is provided between the sun gear 6 and the ring gear 9, and both sides of the planetary gear 7 are engaged with the sun gear 6 and the ring gear 9, respectively. The planet wheel 7 is rotatably connected to the planet carrier 8, i.e. the planet wheel 7 is rotatably mounted to the planet carrier 8. The carrier 8 is selectively connected to and disconnected from the intermediate shaft 4 by a clutch 11.

An output shaft 13 is rotatably mounted to the housing 1, the output shaft 13 being connected to the planet carrier 8 by a second gear set. The output shaft 13 is for connection to a running gear and the second gear set is for reducing the rotational speed of the planet carrier 8 and transmitting it to the output shaft 13. Specifically, the power of the carrier 8 is transmitted to the downstream running gear via the second gear set and the output shaft 13 in order. The second gear set includes a second driving gear 12 and a second driven gear 14 meshed with the second driving gear 12. Wherein, the second driving gear 12 is arranged on the planet carrier 8 through a threaded fastener, the second driven gear 14 is arranged on the output shaft 13, and the number of teeth of the second driven gear 14 is greater than that of the second driving gear 12.

In the embodiment of the utility model, shift switching can be achieved by switching the states of both the brake 10 and the clutch 11.

In first gear, the brake 10 connects the ring gear 9 and the housing 1, i.e. the ring gear 9 is fixed relative to the housing 1, and the clutch 11 disengages the planet carrier 8 from the intermediate shaft 4. The power of the input shaft 2 is output outwards through the first driving gear 3, the first driven gear 5, the intermediate shaft 4, the sun gear 6, the planet gears 7, the planet carrier 8, the second driving gear 12, the second driven gear 14 and the output shaft 13. The transmission achieves three-stage deceleration through deceleration between the first driving gear 3 and the first driven gear 5, deceleration between the sun gear 6 and the planet carrier 8, and deceleration between the second driving gear 12 and the second driven gear 14, so that a large reduction ratio is provided between the output shaft 13 and the input shaft 2. Therefore, the power system formed by the speed changer and the high-speed motor with smaller size provided by the embodiment of the utility model can achieve the power effect of the power system formed by the large-size motor and the gearbox with small reduction ratio, so that the comprehensive cost of the power system is lower.

When the reverse gear is carried out, the reverse gear of the transmission can be realized through the reverse rotation of the motor 17 under the condition that the transmission is in the state, so that the reverse gear can be realized through the reverse rotation of the motor 17, and an independent reverse gear unit is not required to be arranged, so that the structure of the transmission is simpler.

In second gear, the brake 10 disengages the ring gear 9 from the housing 1, and the clutch 11 connects the carrier 8 with the intermediate shaft 4, i.e. the carrier 8 is fixed relative to the intermediate shaft 4. The power of the input shaft 2 is output outwards through the first driving gear 3, the first driven gear 5, the intermediate shaft 4, the planet carrier 8, the second driving gear 12, the second driven gear 14 and the output shaft 13. At this time, the transmission achieves a two-stage deceleration through deceleration between the first driving gear 3 and the first driven gear 5 and deceleration between the second driving gear 12 and the second driven gear 14, and the reduction ratio between the output shaft 13 and the input shaft 2 is smaller than that in the previous state, so the rotation speed of the output shaft 13 is relatively high, so that the working machine can travel quickly.

In neutral, the brake 10 disengages the ring gear 9 from the housing 1, and the clutch 11 disengages the carrier 8 from the intermediate shaft 4, the transmission is in a neutral state, and the power of the input shaft 2 is not transmitted to the output shaft 13.

By means of the arrangement, the transmission provided by the embodiment of the utility model realizes a larger reduction ratio by utilizing the principle of planetary reduction, and compared with a full parallel shaft type transmission, the transmission provided by the embodiment of the utility model has fewer gears, is convenient to operate, is more compact in structure and smaller in weight and external dimension under the working condition of equal output torque, so that complete vehicle matching is facilitated, more space arrangement batteries are reserved, and the cruising capacity of the working machinery is improved.

The embodiment of the utility model also comprises a power system.

Specifically, the powertrain includes the electric machine 17 and the transmission described above. The motor 17 is connected to a transmission.

The powertrain includes a transmission, and all of the above advantages of the transmission are included, and are not described in detail herein.

In some embodiments provided by the present utility model, the number of motors 17 is at least two, the motor shafts of at least two motors 17 are sequentially connected in series and connected with the transmission, specifically, the motor shafts of at least two motors 17 are sequentially connected in series and connected with the input shaft 2. So set up, on the one hand, two at least motors 17 can provide power jointly to output great moment of torsion, and then guarantee the power demand of load end, on the one hand two at least motors 17 can share the load, thereby avoid the overload of single motor 17, and then lengthen the life-span of every motor 17, on the other hand through setting up two at least motors 17, when a motor 17 breaks down, other motors 17 still can provide power, improve the reliability and the stability of driving system operation.

The embodiment of the utility model also provides a working machine.

The work machine includes a transmission as described above or a powertrain as described above.

When necessary, the work machine includes a transmission or a power system, and also includes corresponding advantages, which are not described herein.

Work machines described herein include, but are not limited to, loaders and excavators.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A transmission, comprising:

a housing (1);

an intermediate shaft (4) rotatably mounted to the housing (1) and adapted to be connected to a motor (17);

sun gear (6), planet wheel (7), planet carrier (8), ring gear (9), stopper (10) and clutch (11), sun gear (6) install in jackshaft (4), ring gear (9) cover is established sun gear (6) outside, and through stopper (10) with casing (1) alternative connection or break away from, planet wheel (7) are established sun gear (6) with between ring gear (9) and with planet carrier (8) rotate and are connected, planet carrier (8) pass through clutch (11) with jackshaft (4) alternative connection or break away from, planet carrier (8) are used for being connected with running gear.

2. Transmission according to claim 1, characterized in that the transmission further comprises an input shaft (2) and a first gear set, the input shaft (2) being rotatably mounted to the housing (1), the input shaft (2) being connected with the intermediate shaft (4) via the first gear set, the input shaft (2) being intended to be connected with the electric motor (17), the first gear set being intended to reduce the rotational speed of the input shaft (2) and to transmit it to the intermediate shaft (4).

3. A transmission according to claim 1 or 2, characterized in that the transmission further comprises an output shaft (13) and a second gear set, the output shaft (13) being rotatably mounted to the housing (1), the output shaft (13) being connected to the planet carrier (8) via the second gear set, the output shaft (13) being intended to be connected to the travelling mechanism, the second gear set being intended to reduce the rotational speed of the planet carrier (8) and to transmit it to the output shaft (13).

4. Transmission according to claim 1 or 2, characterized in that the ring gear (9) is connected to the brake (10) by means of a spline, the brake (10) being connected to the housing (1) by means of the spline;

and/or, the intermediate shaft (4) is connected with the clutch (11) through a spline, and the clutch (11) is connected with the planet carrier (8) through a spline.

5. Transmission according to claim 1 or 2, wherein the brake (10) is a normally open brake and the clutch (11) is a normally open clutch.

6. Transmission according to claim 1 or 2, characterized in that the sun gear (6) is connected to the intermediate shaft (4) by means of splines.

7. A transmission according to claim 3, further comprising a first output flange (15) and a second output flange (16), the first output flange (15) and the second output flange (16) being both provided on the output shaft (13).

8. A power system, characterized by comprising an electric machine (17) and a transmission according to any of claims 1-7, said electric machine (17) being connected to said transmission.

9. A power system according to claim 8, characterized in that the number of said motors (17) is at least two, the motor shafts of at least two of said motors (17) being in turn connected in series and in connection with said transmission.

10. A work machine comprising a transmission according to any one of claims 1-7 or a power system according to any one of claims 8-9.