An eight-speed transmission with power output

Abstract

The invention discloses an eight-speed transmission with power output, which comprises an input shaft, an output shaft, a first intermediate shaft, a second intermediate shaft, a transmission shaft, a first clutch, a second clutch, a third clutch, a fourth clutch, a fifth clutch, a sixth clutch, a housing and a power motor; the center lines of the input shaft, the transmission shaft and the output shaft are arranged in a colinear manner and are arranged on the housing in sequence; the first clutch and the second clutch are arranged between the first intermediate shaft and the input shaft, the third clutch and the fourth clutch are arranged between the first intermediate shaft and the transmission shaft, the fifth clutch is arranged between the second intermediate shaft and the transmission shaft, and the sixth clutch is arranged between the second intermediate shaft and the output shaft; the first intermediate shaft or the second intermediate shaft is transmission-connected with the rotating end of the power motor, and the power motor is used to transmit power to the intermediate shaft. This makes the structure of the hybrid vehicle more compact and occupies less space.

Description

Technical Field

[0001] The invention relates to the field of transmissions, and in particular to an eight-speed transmission with power output. Background Art

[0002] The transmission can change the different torques of the front and rear inputs through different gear changes and different power drives. By switching different clutches of the transmission, the switching of different gears of the transmission can be achieved. At the same time, the hybrid vehicle system can achieve hybrid drive of the transmission by adding a power motor to the engine. Hybrid vehicles have the characteristics of energy saving and low emissions. Existing hybrid systems are generally used in small cars. The existing hybrid systems of large vehicles are already bloated. If a power motor is added, a transmission is generally connected to both ends of the power motor, which makes the transmission large and occupies a large space. Summary of the invention

[0003] Therefore, it is necessary to provide an eight-speed transmission with power output to solve the problem of large transmission volume occupied by hybrid vehicles.

[0004] To achieve the above object, the inventor provides an eight-speed transmission with power output, the eight-speed transmission comprising an input shaft, an output shaft, a first intermediate shaft, a second intermediate shaft, a transmission shaft, a first clutch, a second clutch, a third clutch, a fourth clutch, a fifth clutch, a sixth clutch, a housing and a power motor;

[0005] The input shaft, the transmission shaft and the output shaft are arranged in sequence, the center lines of the input shaft, the transmission shaft and the output shaft are arranged on the same line, and the input end of the input shaft and the output end of the output shaft respectively penetrate the two opposite side walls of the housing and are arranged on the housing;

[0006] The input shaft transmits power to the first intermediate shaft through the first clutch or the second clutch, the first intermediate shaft transmits power to the transmission shaft through the third clutch or the fourth clutch, and then the transmission shaft transmits power to the output shaft through the fifth clutch, or the transmission shaft transmits power to the output shaft through the second intermediate shaft via the sixth clutch, and the center lines of the first intermediate shaft and the second intermediate shaft are parallel to the center line of the input shaft and are arranged in the housing;

[0007] One end of the first intermediate shaft or the second intermediate shaft is drivingly connected to the rotating end of the power motor, and the power motor is arranged outside the housing, and the power motor is used to transmit power to the first intermediate shaft or the second intermediate shaft.

[0008] Further, the first clutch and the second clutch form a first switchable double clutch, the third clutch and the fourth clutch form a second switchable double clutch, the fifth clutch and the sixth clutch form a third switchable double clutch, and the first switchable double clutch, the second switchable double clutch and the third switchable double clutch are the same switchable double clutch;

[0009] The switchable dual clutch comprises a first clutch block, a second clutch block and a piston unit; the first clutch block is located on one side of the piston unit, the second clutch block is located on the other side of the piston unit, and the piston unit is used to clutch the first clutch block and the second clutch block;

[0010] A first gear pair is provided between the input shaft and the first intermediate shaft, one gear of the first gear pair is movably sleeved on the input shaft, and another gear of the first gear pair is provided on the first intermediate shaft; a second gear pair is provided between the input shaft and the first intermediate shaft, one gear of the second gear pair is movably sleeved on the input shaft, and another gear of the second gear pair is provided on the first intermediate shaft; a third gear pair is provided between the transmission shaft and the first intermediate shaft, one gear of the third gear pair is movably sleeved on the transmission shaft, and another gear of the third gear pair is provided on the first intermediate shaft; a fourth gear pair is provided between the transmission shaft and the first intermediate shaft, one gear of the fourth gear pair is movably sleeved on the transmission shaft, and another gear of the fourth gear pair is provided on the first intermediate shaft; a fifth gear pair is provided between the transmission shaft and the second intermediate shaft, one gear of the fifth gear pair is provided on the transmission shaft, and another gear of the fifth gear pair is provided on the second intermediate shaft; a sixth gear pair is provided between the output shaft and the second intermediate shaft, one gear of the sixth gear pair is movably sleeved on the output shaft, and another gear of the sixth gear pair is provided on the second intermediate shaft;

[0011] The first clutch block of the first switching double clutch is used for clutching the input shaft with a gear of the first gear pair, and the second clutch block of the first switching double clutch is used for clutching the input shaft with a gear of the second gear pair, and the first clutch block of the first switching double clutch and the second clutch block of the first switching double clutch are mutually exclusive clutches;

[0012] The first clutch block of the second switching double clutch is used for clutching the transmission shaft with a gear of the third gear pair, and the second clutch block of the second switching double clutch is used for clutching the transmission shaft with a gear of the fourth gear pair. The first clutch block of the second switching double clutch and the second clutch block of the second switching double clutch are mutually exclusive clutches.

[0013] The first clutch block of the third switching double clutch is used for clutching the transmission shaft with a gear of the fifth gear pair, and the second clutch block of the third switching double clutch is used for clutching the output shaft with a gear of the sixth gear pair. The first clutch block of the third switching double clutch and the second clutch block of the third switching double clutch are mutually exclusive clutches.

[0014] Further, the piston unit comprises a double-headed piston body and a cavity;

[0015] The cross section of the double-headed piston body is an I-shape, one end of the double-headed piston body is arranged in the cavity, and the other end of the double-headed piston body is located outside the cavity, and the two ends of the cavity are respectively connected to a hydraulic unit.

[0016] Furthermore, the first clutch block includes a first friction plate group, and the second clutch block includes a second friction plate group. The first friction plate group is located on one side of the other end of the double-headed piston body, and the second friction plate group is located on the other side of the other end of the double-headed piston body. The double-headed piston body is used to drive one of the first friction plate group or the second friction plate group to engage and the other to separate.

[0017] Further, the second gear pair and the third gear pair form the same gear pair.

[0018] Furthermore, a keyway is provided on the axial surface of the intermediate shaft of the power motor, and the output end of the power motor is fixedly connected in the keyway.

[0019] Furthermore, there are multiple first intermediate shafts or second intermediate shafts, and the multiple first intermediate shafts or second intermediate shafts are arranged in a circular array around the center line of the input shaft or output shaft. The multiple first intermediate shafts or second intermediate shafts have the same structure, and the multiple first intermediate shafts or second intermediate shafts are respectively connected to a power motor.

[0020] Furthermore, the power motor is a DC power motor.

[0021] Different from the prior art, the power motor installed on the intermediate shaft of the above technical solution drives the transmission together with the existing power at the input end of the input shaft. When necessary, the power motor can also provide power to the transmission alone to drive the transmission operation. When working together, the power motor will share the load of the output shaft and realize the output of hybrid power with the power of the input shaft. Since the power motor is set on the intermediate shaft on the side of the transmission instead of on the output shaft, the structure is more compact and the space occupied is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a simplified structural diagram of the eight-speed transmission of this embodiment;

[0023] Figure 2 A schematic structural diagram of an eight-speed transmission according to other embodiments;

[0024] Figure 3 is another structural schematic diagram of the eight-speed transmission of this embodiment;

[0025] Figure 4 It is a schematic structural diagram of the switchable dual clutch described in a specific implementation method.

[0026] Description of reference numerals:

[0027] 1. Eight-speed transmission;

[0028] 11. Input shaft;

[0029] 12. Output shaft;

[0030] 13. First intermediate shaft;

[0031] 14. Second intermediate shaft;

[0032] 15. Transmission shaft;

[0033] 16. Shell;

[0034] 17. The first gear pair;

[0035] 18. Second gear pair;

[0036] 181. Common gear pair;

[0037] 19. The third gear pair;

[0038] 20. Fourth gear pair;

[0039] 21. Fifth gear pair;

[0040] 22. Sixth gear pair;

[0041] 2. Power motor;

[0042] 3. Switchable clutch;

[0043] 31. First clutch block;

[0044] 311, first friction plate group;

[0045] 32. Second clutch block;

[0046] 321, second friction plate group;

[0047] 33. Double-headed piston body;

[0048] 34. Cavity;

[0049] 35. Hydraulic unit;

[0050] 36. A first switching clutch;

[0051] 37. Second switchable clutch;

[0052] 38. Third switching clutch;

[0053] k1, first clutch;

[0054] k2, second clutch;

[0055] k3, third clutch;

[0056] k4, fourth clutch;

[0057] k5, fifth clutch;

[0058] k6, sixth clutch. DETAILED DESCRIPTION

[0059] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0060] See also Figures 1 to 4 The present embodiment provides an eight-speed transmission with power output, the eight-speed transmission comprising an input shaft 11, an output shaft 12, a first intermediate shaft 13, a second intermediate shaft 14, a transmission shaft 15, a first clutch k1, a second clutch k2, a third clutch k3, a fourth clutch k4, a fifth clutch k5, a sixth clutch k6, a housing 16 and a power motor 2; the input shaft 11, the transmission shaft 15 and the center line of the output shaft 11 are arranged in a colinear manner and in sequence, and the input end of the input shaft 11 and the output end of the output shaft 12 respectively penetrate the housing 16 opposite to each other. The two side walls are arranged on the housing 16; the input shaft 11 transmits power to the first intermediate shaft 13 through the first clutch k1 or the second clutch k2, the first intermediate shaft 13 transmits power to the transmission shaft 15 through the third clutch k3 or the fourth clutch k4, and then the transmission shaft 15 transmits power to the output shaft through the fifth clutch k5, or the transmission shaft 15 transmits power to the output shaft through the second intermediate shaft via the sixth clutch, and the center lines of the first intermediate shaft 13 and the second intermediate shaft 14 are arranged in the housing 16 in parallel with the center line of the input shaft 11. It should be noted here that the intermediate shaft in this article includes the first intermediate shaft 13 and the second intermediate shaft 14; one end of the first intermediate shaft 13 or the second intermediate shaft 14 is transmission-connected with the rotating end of the power motor 2, and the power motor 2 is arranged outside the housing 16, and the power motor 2 is used to transmit power to the intermediate shaft connected to the power motor. The power motor 2 can be a DC power motor, an AC power motor, a permanent magnet synchronous motor, etc.

[0061] The power motor and the power mechanism connected to the input end are combined into a driving force, which can be used as a power vehicle system of a hybrid vehicle. The power motor can provide power to the output shaft together with the power mechanism connected to the input shaft; the power motor can also transmit power to the output shaft through the intermediate shaft (the first intermediate shaft or the second intermediate shaft) alone; relying on the power motor as another power source to provide additional power required for acceleration or climbing can greatly improve the overall efficiency without sacrificing performance. The power motor and the power mechanism can complement each other. The power motor can be used to drive the vehicle at low speed. The power motor will also share the load of the output shaft and realize hybrid power output with the power of the input shaft. At the same time, the overall structure of the vehicle is made compact, emissions are reduced, energy is saved, and the overall efficiency of the vehicle is improved.

[0062] In some embodiments, in order to provide a power source for the eight-speed transmission 1 , a power mechanism may be connected to the input end of the input shaft 11 , and the power mechanism is used to drive the input shaft 11 to rotate.

[0063] In this embodiment, the connection between the power motor and the first intermediate shaft or the second intermediate shaft is a direct connection. Specifically, a keyway is provided on the axial surface between the first intermediate shaft or the second intermediate shaft, and the output end of the power motor can be inserted and fixed in the keyway by means of interference fit. Alternatively, the direct connection can be other embodiments, such as the output end of the power motor and one end of the first intermediate shaft or the second intermediate shaft are connected through a coupling.

[0064] In some embodiments, the connection between the power motor and the first intermediate shaft or the second intermediate shaft may be a gear connection. Specifically, the output shaft of the power motor may be sleeved with a gear, and the first intermediate shaft or the second intermediate shaft may also be sleeved with a gear, and the gear on the power motor and the gear on the first intermediate shaft or the second intermediate shaft may be meshed with each other, so that the power motor drives the output shaft to rotate.

[0065] Generally, in order to realize the operation of the clutch, the clutch is arranged on the power input end, one end of the clutch is connected to the power input end, and the other end is connected to the power output end. In this embodiment, the power input end may be an input shaft, and the power output end is a gear rotatably mounted on the input shaft; or the power output end is an output shaft, and the power input end is a gear rotatably mounted on the output shaft.

[0066] In some embodiments, the first clutch k1, the second clutch k2, the third clutch k3, the fourth clutch k4, the fifth clutch k5 and the sixth clutch k6 are existing clutch structures, such as friction clutches and hydraulic clutches. In the case of friction clutches, a friction clutch is provided beside a gear of each gear pair. One end of the friction clutch is fixed on the input shaft (or output shaft), and the other end of the friction clutch is connected to the gear of the gear pair. When the friction clutch is in the engaged state, the input shaft (or output shaft) and the gear are driven, and when the friction clutch is in the disengaged state, the input shaft (or output shaft) and the gear are not driven.

[0067] See also Figure 4 , the existing clutch has two clutches in the closed state at the same time, which will cause the situation of stuck teeth. In order to optimize the structure of the transmission, solve the problem of stuck teeth in the clutch switching of the traditional transmission, and make the overall structure simpler. Therefore, in this embodiment, the first clutch k1 and the second clutch k2 form a first switching double clutch 36, the third clutch k3 and the fourth clutch k4 form a second switching double clutch 37, and the fifth clutch k5 and the sixth clutch k6 form a third switching double clutch 38. The first switching double clutch 36, the second switching double clutch 37 and the third switching clutch 38 are the same switching double clutch 3. The switching double clutch 3 includes a first clutch block 31, a second clutch block 32 and a piston unit. The first clutch block 31 is located on one side of the piston unit, and the second clutch block 32 is located on the other side of the piston unit. The piston unit is used to make the first clutch block 31 and the second clutch block 32 clutch. The piston unit of the switchable dual clutch 3 can only push the first clutch block 31 or the second clutch block 32 to the closed state, thereby avoiding the situation where both are in the closed state at the same time.

[0068] See also Figure 2In other embodiments, a first gear pair 17 is provided between the input shaft and the first intermediate shaft, one gear of the first gear pair 17 is movably mounted on the input shaft, and another gear of the first gear pair 17 is provided on the first intermediate shaft; a second gear pair 18 is provided between the input shaft and the first intermediate shaft, one gear of the second gear pair is movably mounted on the input shaft, and another gear of the second gear pair is provided on the first intermediate shaft; a third gear pair is provided between the transmission shaft and the first intermediate shaft, one gear of the third gear pair is movably mounted on the transmission shaft, and another gear of the third gear pair is provided on the first intermediate shaft; a fourth gear pair is provided between the transmission shaft and the first intermediate shaft, one gear of the fourth gear pair is movably mounted on the transmission shaft, and another gear of the fourth gear pair is provided On the first intermediate shaft; a fifth gear pair is arranged between the transmission shaft and the second intermediate shaft, one gear of the fifth gear pair is movably sleeved on the transmission shaft, and the other gear of the fifth gear pair is arranged on the second intermediate shaft; a sixth gear pair is arranged between the output shaft and the second intermediate shaft, one gear of the sixth gear pair is movably sleeved on the output shaft, and the other gear of the sixth gear pair is arranged on the second intermediate shaft; the input shaft and the first intermediate shaft are transmission-connected through the first gear pair and the second gear pair, the transmission shaft and the first intermediate shaft are transmission-connected through the third gear pair and the fourth gear pair, the transmission shaft and the second intermediate shaft are transmission-connected through the fifth gear pair, and the output shaft and the second intermediate shaft are transmission-connected through the sixth gear pair. That is, the relationship between the gear pairs of the switchable dual clutch is as follows: the first clutch block of the first switchable dual clutch (realizing the function of the first clutch K1) is used for clutching the input shaft with a gear of the first gear pair, the second clutch block of the first switchable dual clutch (realizing the function of the second clutch K2) is used for clutching the input shaft with a gear of the second gear pair, and the first clutch block of the first switchable dual clutch and the second clutch block of the first switchable dual clutch are mutually exclusive clutches; the first clutch block of the second switchable dual clutch (realizing the function of the third clutch K3) is used for clutching the transmission shaft with a gear of the third gear pair, and the second switchable dual clutch The second clutch block (realizing the function of the fourth clutch K4) is used for clutching the transmission shaft and a gear of the fourth gear pair, and the first clutch block of the second switching double clutch and the second clutch block of the second switching double clutch are mutually exclusive clutches; the first clutch block of the third switching double clutch (realizing the function of the fifth clutch K5) is used for clutching the transmission shaft and a gear of the fifth gear pair, and the second clutch block of the third switching double clutch (realizing the function of the sixth clutch K6) is used for clutching the output shaft and a gear of the sixth gear pair, and the first clutch block of the third switching double clutch and the second clutch block of the third switching double clutch are mutually exclusive clutches.Through the above-mentioned gear pair and switchable dual clutch, it is possible to realize whether the power of the input shaft is transmitted to the intermediate shaft, and by the different gear ratios of the gear pair set on the input shaft, the input shaft power can be transmitted to the intermediate shaft with different torques. At the same time, it is possible to realize whether the power of the intermediate shaft is transmitted to the transmission shaft and the output shaft, and by the different gear ratios of the gear pair set on the transmission shaft and the output shaft, the transmission shaft power can be transmitted to the output shaft with different torques. By controlling the change of torque during the power transmission process, the gear position change of the eight-speed gearbox is realized.

[0069] The piston unit can be pushed left and right respectively to make the clutch blocks on both sides engage and disengage. In this embodiment, a piston unit includes a double-headed piston body 33 and a cavity 34. The cross section of the double-headed piston body 33 is an I-shaped, one end of the double-headed piston body 33 is arranged in the cavity 34, and the other end of the double-headed piston body 33 is located outside the cavity 34. The double-headed piston body 33 will only push one clutch block to form a closed state with the gear pair, so that the switchable dual clutch 3 will only be in a closed state with one gear pair, and in a closed state with the other gear pair, so that the clutch blocks on both sides will not be engaged at the same time, making the transmission shift more accurate and flexible. At the same time, by setting the other end of the double-headed piston body outside the cavity 34 and using it to push the clutch blocks on both sides to engage and disengage, the lateral width of the double-headed piston body 33 is also reduced, thereby making the structure compact.

[0070] See also Figure 3In order to reduce the excessive number of gears and optimize the structure, in this embodiment, the second gear pair 18 and the third gear pair 19 are formed into the same gear pair, that is, a shared gear pair. Here, the gear pair formed by the second gear pair 18 and the third gear pair 19 is named a shared gear pair 181. One gear of the shared gear pair 181 can be slidably set on the input shaft 11 or on the transmission shaft 15, and the other gear is set on the first intermediate shaft. Here, taking the shared gear pair set on the transmission shaft as an example, the relationship between the gear pairs of the switchable dual clutch is that the second clutch block of the first switchable dual clutch is used for clutching the transmission shaft with a gear of the shared gear pair, and the first clutch block of the second switchable dual clutch is used for clutching the transmission shaft with a gear of the shared gear pair. The remaining first gear pair, fourth gear pair, fifth gear pair and sixth gear pair remain unchanged, and the functions of the clutch blocks of the remaining switchable dual clutches are as follows: the first clutch block of the first switchable dual clutch is used for clutching the input shaft with a gear of the first gear pair, the second clutch block of the second switchable dual clutch is used for clutching the transmission shaft with a gear of the fourth gear pair, the first clutch block of the third switchable dual clutch is used for clutching the transmission shaft with a gear of the fifth gear pair, and the second clutch block of the third switchable dual clutch is used for clutching the output shaft with a gear of the sixth gear pair.

[0071] In order to realize the clutch structure inside the clutch, the clutch mode of friction plate can be adopted, the first clutch block 31 includes a first friction plate group 311, the second clutch block 32 includes a second friction plate group 321, the first friction plate group 311 is located on one side of the other end of the double-headed piston body 33, and the second friction plate group 311 is located on the other side of the other end of the double-headed piston body 33, and the double-headed piston body 33 is used to drive one of the first friction plate group 311 or the second friction plate group 321 to engage and the other to separate. That is, the friction plate of the first clutch block 31 or the friction plate of the second clutch block 32 can be pushed by the double-headed piston body 33 to realize the clutch of the first clutch block 31 or the second clutch block 32.

[0072] In this embodiment, the double-headed piston body is used to push the first friction plate group and the second friction plate group. In order to provide power to the double-headed piston body, the two ends of the cavity of the switchable dual clutch are respectively connected to a hydraulic unit 35 for driving the movement of the double-headed piston body. The hydraulic unit 35 includes a hydraulic pump and a hydraulic pipeline. One end of the hydraulic pipeline is connected to the hydraulic pump, and the other end of the hydraulic pipeline is connected to the cavity. The hydraulic pipeline includes a first hydraulic pipeline and a second hydraulic pipeline. The first hydraulic pipeline is connected to the cavity on the left side of the double-headed piston body, and the second hydraulic pipeline is connected to the cavity on the right side of the double-headed piston body. Hydraulic oil is injected into the hydraulic pipeline, and it works in a state of being filled with hydraulic oil, and hydraulic oil can be transported to the cavity respectively. Therefore, only by pressurizing the hydraulic oil in the hydraulic pipeline on one side, the oil pressure in the cavity will be unbalanced, and then the double-headed piston body will be driven to move in the cavity, so as to achieve the purpose of controlling the double-headed piston body to move in the cavity through the oil pressure of the hydraulic oil.

[0073] In this embodiment, the first gear pair, the common gear pair and the first switching dual clutch are taken as examples. By applying pressure to the hydraulic oil in the second hydraulic pipeline, the pressure of the hydraulic oil in the second hydraulic pipeline is greater than that of the first hydraulic pipeline, and the double-headed piston body is pushed to move to one side of the first hydraulic pipeline, so that the first clutch block of the first switching dual clutch and a gear of the first gear pair are in a closed state, and at this time, the second clutch block of the first switching dual clutch and a gear of the common gear pair are in a closed state. Similarly, the pressure of the hydraulic oil in the first hydraulic pipeline is greater than that of the second hydraulic pipeline, and the double-headed piston body is pushed to move to one side of the second hydraulic pipeline, so that the second clutch block of the first switching dual clutch and a gear of the common gear pair are in a closed state, and at this time, the first clutch block of the first switching dual clutch and the first gear pair are in a closed state. Further, the pressure in the hydraulic pipelines on both sides is equalized, so that the double-headed piston body is located in the middle position of the cavity, so that the second clutch block of the first switching dual clutch and the common gear pair are in a closed state, and the first clutch block of the first switching dual clutch and the first gear pair are in a closed state, that is, the neutral state is achieved.

[0074] by Figure 3Taking the present embodiment as an example, it should be explained here that the eight-speed clutch realizes the separate circuit of the power motor in the hybrid power as follows: the power mechanism connected to the input shaft does not work and does not transmit power to the input shaft, and the power motor alone provides power to the first intermediate shaft or the second intermediate shaft. When the power motor is connected to the first intermediate shaft, the first intermediate shaft transmits power to the transmission shaft through the common gear pair or the fourth gear pair, and the transmission shaft then transmits power to the output shaft. When the power motor is connected to the second intermediate shaft, the power is directly transmitted from the second intermediate shaft to the output shaft. In this way, the hybrid power realizes the separate operation of the power motor.

[0075] In this embodiment, there are two first intermediate shafts and two second intermediate shafts, and the first intermediate shafts and the second intermediate shafts are arranged in a circular array around the center line of the input shaft or the output shaft, and the power motor can be arranged at any end of the intermediate shaft. According to actual needs, the power motor can be arranged on the same side as the input shaft or the same side as the output shaft. In some embodiments, the number of the first intermediate shafts and the second intermediate shafts is multiple, which can be two, three or four or more. The multiple first intermediate shafts and the second intermediate shafts are arranged in a circular array on the center axis of the input shaft or the output shaft. For example, the two first intermediate shafts and the second intermediate shafts can be arranged at the upper and lower positions of the input shaft and the output shaft respectively. The structures of the multiple groups of first intermediate shafts and second intermediate shafts are the same, such as gears with the same number of teeth and the same tooth width. In this way, the loads of the input shaft and the output shaft can be distributed through the multiple first intermediate shafts and the second intermediate shafts to enhance the bending strength of the input shaft, the intermediate shaft and the output shaft, thereby improving the bearing capacity of the input shaft and the output shaft, and achieving the purpose of increasing the load. At the same time, through multiple power motors, under the condition of the same output power, the single length of multiple power motors can be greatly reduced relative to that of one power motor, so that the length of the hybrid power system can be greatly reduced, making the structure compact. Especially in the field of mining vehicles and other fields that require high-power motors, the use of multiple small power motors can use the power motors of existing passenger cars, which can greatly reduce the cost. The power motor drives the operation of the transmission together with the power mechanism or alone. When driven together, the power motor will serve as an auxiliary power to cooperate with the power system to drive; in some cases, the power motor can also drive the transmission alone.

[0076] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. An eight-speed transmission with power output, characterized in that: The eight-speed transmission includes an input shaft, an output shaft, a first intermediate shaft, a second intermediate shaft, a transmission shaft, a first clutch, a second clutch, a third clutch, a fourth clutch, a fifth clutch, a sixth clutch, a housing and a power motor; The input shaft, the transmission shaft and the output shaft are arranged in sequence, the center lines of the input shaft, the transmission shaft and the output shaft are arranged on the same line, and the input end of the input shaft and the output end of the output shaft respectively penetrate the two opposite side walls of the housing and are arranged on the housing; The input shaft transmits power to the first intermediate shaft through the first clutch or the second clutch, the first intermediate shaft transmits power to the transmission shaft through the third clutch or the fourth clutch, and then the transmission shaft transmits power to the output shaft through the fifth clutch, or the transmission shaft transmits power to the output shaft through the second intermediate shaft via the sixth clutch, and the center lines of the first intermediate shaft and the second intermediate shaft are parallel to the center line of the input shaft and are arranged in the housing; One end of the first intermediate shaft or the second intermediate shaft is drivingly connected to the rotating end of the power motor, and the power motor is arranged outside the housing, and the power motor is used to transmit power to the first intermediate shaft or the second intermediate shaft; The first clutch and the second clutch form a first switchable double clutch, the third clutch and the fourth clutch form a second switchable double clutch, the fifth clutch and the sixth clutch form a third switchable double clutch, and the first switchable double clutch, the second switchable double clutch and the third switchable double clutch are the same switchable double clutch; The switchable dual clutch comprises a first clutch block, a second clutch block and a piston unit; the first clutch block is located on one side of the piston unit, the second clutch block is located on the other side of the piston unit, and the piston unit is used to clutch the first clutch block and the second clutch block; A first gear pair is provided between the input shaft and the first intermediate shaft, one gear of the first gear pair is movably sleeved on the input shaft, and another gear of the first gear pair is provided on the first intermediate shaft; a second gear pair is provided between the input shaft and the first intermediate shaft, one gear of the second gear pair is movably sleeved on the input shaft, and another gear of the second gear pair is provided on the first intermediate shaft; a third gear pair is provided between the transmission shaft and the first intermediate shaft, one gear of the third gear pair is movably sleeved on the transmission shaft, and another gear of the third gear pair is provided on the first intermediate shaft; a fourth gear pair is provided between the transmission shaft and the first intermediate shaft, one gear of the fourth gear pair is movably sleeved on the transmission shaft, and another gear of the fourth gear pair is provided on the first intermediate shaft; a fifth gear pair is provided between the transmission shaft and the second intermediate shaft, one gear of the fifth gear pair is provided on the transmission shaft, and another gear of the fifth gear pair is provided on the second intermediate shaft; a sixth gear pair is provided between the output shaft and the second intermediate shaft, one gear of the sixth gear pair is movably sleeved on the output shaft, and another gear of the sixth gear pair is provided on the second intermediate shaft; The first clutch block of the first switching double clutch is used for clutching the input shaft with a gear of the first gear pair, and the second clutch block of the first switching double clutch is used for clutching the input shaft with a gear of the second gear pair, and the first clutch block of the first switching double clutch and the second clutch block of the first switching double clutch are mutually exclusive clutches; The first clutch block of the second switching double clutch is used for clutching the transmission shaft with a gear of the third gear pair, and the second clutch block of the second switching double clutch is used for clutching the transmission shaft with a gear of the fourth gear pair. The first clutch block of the second switching double clutch and the second clutch block of the second switching double clutch are mutually exclusive clutches. The first clutch block of the third switching double clutch is used for clutching the transmission shaft with a gear of the fifth gear pair, and the second clutch block of the third switching double clutch is used for clutching the output shaft with a gear of the sixth gear pair. The first clutch block of the third switching double clutch and the second clutch block of the third switching double clutch are mutually exclusive clutches. The power motor is a DC power motor.

2. An eight-speed transmission with power output according to claim 1, characterized in that: The piston unit comprises a double-headed piston body and a cavity; The cross section of the double-headed piston body is an I-shape, one end of the double-headed piston body is arranged in the cavity, and the other end of the double-headed piston body is located outside the cavity, and the two ends of the cavity are respectively connected to a hydraulic unit.

3. An eight-speed transmission with power output according to claim 2, characterized in that: The first clutch block includes a first friction plate group, and the second clutch block includes a second friction plate group. The first friction plate group is located on one side of the other end of the double-headed piston body, and the second friction plate group is located on the other side of the other end of the double-headed piston body. The double-headed piston body is used to drive one of the first friction plate group or the second friction plate group to engage and the other to separate.

4. An eight-speed transmission with power output according to claim 2 or 3, characterized in that: The second gear pair and the third gear pair form the same gear pair.

5. The eight-speed transmission with power output according to claim 1, characterized in that: A keyway is arranged on the axial surface of the intermediate shaft of the power motor, and the output end of the power motor is fixedly connected in the keyway.

6. An eight-speed transmission with power output according to claim 1, characterized in that: There are multiple first intermediate shafts or second intermediate shafts, and the multiple first intermediate shafts or second intermediate shafts are arranged in a circular array around the center line of the input shaft or the output shaft. The multiple first intermediate shafts or second intermediate shafts have the same structure, and the multiple first intermediate shafts or second intermediate shafts are respectively connected to a power motor.

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