A compact hybrid vehicle system

Abstract

The present invention provides a compact hybrid vehicle system including: a power motor, an input shaft, an output shaft, an intermediate shaft, a clutch, and a housing. The center line of the input shaft is arranged in a colinear manner with the center line of the output shaft, and the input end of the input shaft and the output end of the output shaft are respectively arranged on the housing through the two opposite side walls of the housing, the input end of the input shaft and the input end of the intermediate shaft are transmission-connected to the clutch arranged on the input shaft or the output shaft, the two clutches are located between two adjacent gear pairs on the input shaft or the output shaft, and the clutch is used to control the gear pairs on both sides of the clutch to perform mutually exclusive clutch operations. One end of the intermediate shaft is transmission-connected to the rotating end of the power motor, and the power motor is fixed outside the housing to drive the intermediate shaft to rotate. Since the power motor is arranged on the intermediate shaft on the side of the transmission instead of on the output shaft, the distance between the output shaft and the multi-speed transmission can be reduced, making the structure more compact and reducing the occupied space.

Description

Technical Field

[0001] The present invention relates to the field of hybrid power systems, and in particular to a hybrid power vehicle system with a compact structure. 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 a hybrid vehicle system with a compact structure to solve the problem of large volume occupied by the hybrid vehicle system.

[0004] To achieve the above-mentioned object, the inventor provides a compact hybrid vehicle system, characterized in that it includes a two-speed transmission, a power motor, a multi-speed transmission and a power unit;

[0005] The two-speed transmission comprises: an input shaft, an output shaft, an intermediate shaft, a first clutch, a second clutch, and a housing;

[0006] The center line of the input shaft is colinear with the center line of the output shaft, 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 power unit is connected with the input shaft to transmit power to the input shaft, the input shaft transmits power to the intermediate shaft through the first clutch and then transmits power to the output shaft through the intermediate shaft, or the input shaft transmits power to the output shaft through the second clutch, and the center line of the intermediate shaft is parallel to the center line of the input shaft and is arranged in the housing;

[0007] One end of the intermediate shaft is transmission-connected to the rotating end of the power motor, and the power motor is arranged outside the housing to drive the intermediate shaft to rotate, the input end of the multi-speed transmission is transmission-connected to the output end of the output shaft, and the output end of the multi-speed transmission is used to output power to the wheels.

[0008] Furthermore, there are multiple intermediate shafts, and the intermediate shafts are arranged in a circular array around the center lines of the input shaft and the output shaft. The multiple intermediate shafts have the same structure, and each intermediate shaft is connected to a power motor.

[0009] Furthermore, the first clutch and the second clutch are combined into a switchable double clutch structure, and the switchable double clutch includes a first clutch block, a second clutch block and a piston unit;

[0010] The first clutch block is located on one side of the piston unit, and the second clutch block is located on the other side of the piston unit. The piston unit is used to allow the first clutch block, the second clutch block and the piston unit to be clutched;

[0011] A first gear pair is arranged between the input shaft and the 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 arranged on the intermediate shaft. A second gear pair is arranged between the output shaft and the intermediate shaft, one gear of the second gear pair is arranged on the intermediate shaft, and another gear of the second gear pair is arranged on the output shaft. The first clutch block is used for clutching the input shaft with a gear of the first gear pair, and the second clutch block is used for clutching the output shaft with the input shaft. The first clutch block and the second clutch block are mutually exclusive clutches.

[0012] Further, the piston unit comprises a double-headed piston body and a cavity;

[0013] 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 the first hydraulic unit and the second hydraulic unit.

[0014] 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 first clutch block and the second clutch block are used to be respectively arranged on the gear pairs on both sides, and 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.

[0015] Furthermore, the multi-speed transmission is a four-speed transmission.

[0016] Furthermore, the power unit is an engine or a motor.

[0017] Different from the prior art, the above technical solution drives the transmission together with the power unit located at the input end of the input shaft through the power motor installed on the intermediate shaft. When necessary, the power motor can also provide power to the transmission alone to drive the transmission to work. When working together, the power motor will share the load of the output shaft and realize the output of hybrid power with the power unit. Since the power motor is arranged on the intermediate shaft on the side of the transmission instead of on the output shaft, the distance between the output shaft and the multi-speed transmission can be reduced, making the structure more compact and reducing the occupied space. Then, by arranging a multi-speed transmission behind the second-speed transmission, different torque changes of the power from the hybrid power to the wheels can be realized, and the output of multi-speed power can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a simplified structural diagram of a two-speed transmission;

[0019] Figure 2 It is a simplified structural diagram of a two-speed transmission and a four-speed transmission;

[0020] Figure 3 It is a structural diagram of a switching dual clutch in a specific implementation mode;

[0021] Figure 4 It is a schematic diagram of the structure of a power motor and a second-speed transmission in a specific implementation mode;

[0022] Figure 5 It is a structural diagram of a two-speed transmission and a four-speed transmission described in a specific implementation manner.

[0023] Description of reference numerals:

[0024] 1. Two-speed transmission;

[0025] 101, input shaft; 102, output shaft; 103, intermediate shaft; 104, housing; 105, first clutch; 106, second clutch;

[0026] 2. Power motor;

[0027] 3. Switchable dual clutch;

[0028] 301, first clutch block; 302, second clutch block; 303, double-headed piston body; 304, first gear pair; 305, second gear pair; 306, first hydraulic unit; 307, second hydraulic unit;

[0029] 3011, first friction plate group; 3021, second friction plate group;

[0030] 4. Multi-speed transmission;

[0031] 40. 4th gear input shaft; 41. 4th gear output shaft; 42. 4th gear intermediate shaft; 43. 4th gear first clutch; 44. 4th gear second clutch; 45. 4th gear third clutch; 46. 4th gear fourth clutch; 47. 4th gear housing;

[0032] 5. Power unit. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figures 1 to 5 In this embodiment, a compact hybrid vehicle system is provided, comprising: a two-speed transmission 1, a power motor 2, a multi-speed transmission 4 and a power unit 5. The two-speed transmission 1 comprises: an input shaft 101, an output shaft 102, an intermediate shaft 103, a first clutch 105, a second clutch 106 and a housing 104. The center line of the input shaft 101 is arranged in a colinear manner with the center line of the output shaft 102, and the input end of the input shaft 101 and the output end of the output shaft 102 are respectively arranged on the housing 104 through the two opposite side walls of the housing 104, and are respectively used to input and output power. The power unit 5 is connected to the input shaft 101 to transmit power to the input shaft 101, and the input shaft 101 transmits power to the intermediate shaft 103 through the first clutch 105 and then transmits power from the intermediate shaft 103 to the output shaft 102, or the input shaft 101 transmits power to the output shaft 102 through the second clutch 106, and the center line of the intermediate shaft 103 is arranged in the housing 104 in parallel with the center line of the input shaft 101. One end of the intermediate shaft 103 is transmission-connected to the rotating end of the power motor 2, and the power motor 2 is disposed outside the housing 104 to drive the intermediate shaft 103 to rotate. It should be noted that the connection between the rotating end of the power motor 2 and the intermediate shaft 103 can be connected via a transmission connector or directly connected, and can drive the transmission together with the power unit 5 or alone. When driven together, the power motor 2 will serve as an auxiliary power to cooperate with the power system drive; in some cases, the power motor 2 can also drive the transmission alone, and the power unit 5 can be an engine or a motor. For details, please refer to Figure 1 , Figure 4, the power transmission path of the above scheme has the following five modes: First: the power unit 5 and the power motor 2 work at the same time, the power of the input shaft 101 is transmitted to the intermediate shaft 103 through the first clutch 105, and then transmitted to the output shaft 102, and the power motor 2 also transmits power to the intermediate shaft 103 and then transmits it to the output shaft 102, that is, the two-speed transmission 1 has two power sources at the same time. Second: the power unit works, the power motor does not work, the first clutch 105 transmits the power of the input shaft 101 to the output shaft 102 through the intermediate shaft 103, and the power motor 2 does not provide power at this time. Third: the power unit and the power motor work at the same time, the power of the input shaft 101 is transmitted to the output shaft 102 through the second clutch 106, the power motor 2 also transmits power to the intermediate shaft 103, and then transmits it to the output shaft 102 from the intermediate shaft 103, that is, the two-speed transmission 1 has two power sources at the same time. Fourth: the power unit is working, the power motor is not working, and the power of the input shaft 101 is transmitted to the output shaft 102 through the second clutch 106, and the power motor 2 does not provide power at this time. Fifth: the second-speed transmission 1 is in neutral, that is, the double-headed piston body 303 is not engaged with the first clutch block 301 and the second clutch block 302. The power unit is not working, and the power motor 2 provides power alone, and transmits the power directly to the output shaft 102. Generally, the clutch is set 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 can be the input shaft 101, and the power output end is a gear rotatably mounted on the input shaft 101; or the power output end is the output shaft 102, and the power input end is a gear rotatably mounted on the output shaft 102. The first clutch 105 and the second clutch 106 can be friction clutches, etc. In this embodiment, a multi-speed transmission 4 is further provided after the two-speed transmission 1, and the input end of the multi-speed transmission 4 is transmission-connected with the output end of the output shaft 102, and the output end of the multi-speed transmission 4 is used to output power to objects such as wheels. Specifically, the multi-speed transmission can provide a transmission with more gears by superimposing with the original two-speed transmission 1. Compared with the existing integrated transmission, the two transmissions can be set according to actual needs, and the structure is relatively simple, which greatly reduces the production cost. In some embodiments, the first clutch 105 and the second clutch 106 can be existing clutch structures, such as friction clutches and hydraulic clutches, and the clutches only play the role of transmitting power. In the case of a friction clutch, a friction clutch is provided next to a gear of each gear pair.One end of the friction clutch is fixed on the input shaft 101 (or output shaft 102), and the other end of the friction clutch is connected to the gear of the gear pair. When the friction clutch is in the closed state, the input shaft 101 (or output shaft 102) and the gear are transmitted, and when the friction clutch is in the disengaged state, the input shaft 101 (or output shaft 102) and the gear are not transmitted. It should be noted that in this embodiment, the motor installed on the intermediate shaft 103 will drive the transmission together with the existing power unit 5 located at the input end of the input shaft 101. When necessary, the power motor 2 can also provide power to the transmission alone to drive the transmission operation. When working together, the power motor 2 will share the load of the original power unit 5 to achieve the output of hybrid power. Since the power motor 2 is arranged on the intermediate shaft 103 on the side of the transmission, but not on the output shaft 102, the distance between the output shaft 102 and the multi-speed transmission 4 can be reduced, making the structure more compact, reducing the occupied space, and achieving the purpose of increasing the load.

[0035] See also Figures 4 to 5 In this embodiment, there are multiple intermediate shafts 103, and the intermediate shafts 103 are arranged in a circular array around the center lines of the input shaft 101 and the output shaft 102. The multiple intermediate shafts 103 have the same structure, and each intermediate shaft 103 is connected to a power motor 2. The intermediate shafts 103 can be two, three or four, etc. The multiple intermediate shafts 103 are arranged in a circular array on the central axis of the input shaft 101 or the output shaft 102, such as: two intermediate shafts 103 can be arranged at the upper and lower positions of the input shaft 101 and the output shaft 102, respectively, and four intermediate shafts 103 can be arranged at the upper, lower, left and right positions of the input shaft 101 and the output shaft 102, respectively. The multiple intermediate shafts 103 have the same structure and are provided with gears with the same number of teeth and the same tooth width. In this way, through multiple intermediate shafts 103, the load of the input shaft 101 and the output shaft 102 can be distributed, and the bending strength of the input shaft 101 and the output shaft 102 is enhanced, thereby improving the bearing capacity of the input shaft 101 and the output shaft 102, and achieving the purpose of increasing the load. At the same time, through multiple power motors 2, under the condition of the same output power, the single length of multiple power motors 2 can be greatly reduced relative to one power motor 2, 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 2 can use the power motors 2 of existing passenger cars, which can greatly reduce the cost.

[0036] In the existing clutch, if two clutches are in the engaged state at the same time, the situation of stuck teeth will occur. In order to optimize the structure of the transmission, solve the problem of stuck teeth when the clutch is switched in the traditional transmission, and make the overall structure simpler, in this embodiment, the first clutch 105 and the second clutch 106 are combined into the structure of a switchable double clutch 3, and the switchable double clutch 3 includes a first clutch block 301, a second clutch block 302 and a piston unit. The first clutch block 301 is located on one side of the piston unit, and the second clutch block 302 is located on the other side of the piston unit. The piston unit is used to make the first clutch block 301 and the second clutch block 302 engage and disengage with the piston unit; the piston unit of the switchable double clutch 3 can only push the first clutch block 301 or the second clutch block 302 to the engaged state alone, avoiding the situation of being in the engaged state at the same time. A first gear pair 304 is provided between the input shaft 101 and the intermediate shaft 103, one gear of the first gear pair 304 is movably sleeved on the input shaft 101, and another gear of the first gear pair 304 is provided on the intermediate shaft 103. A second gear pair 305 is provided between the output shaft 102 and the intermediate shaft 103, one gear of the second gear pair 305 is provided on the intermediate shaft 103, and another gear of the second gear pair 305 is provided on the output shaft 102. The first clutch block 301 is used for clutching the input shaft 101 with a gear of the first gear pair 304, and the second clutch block 302 is used for clutching the output shaft 102 with the input shaft 101. The first clutch block 301 and the second clutch block 302 are mutually exclusive clutches.

[0037] See also Figure 3In the embodiment, the switchable dual clutch 3 is arranged on the input shaft 101 or the output shaft 102, and is in driving connection with the intermediate shaft 103 or the output shaft 102. Taking the input shaft as an example: a first gear pair 304 is arranged between the input shaft and the intermediate shaft 103, one gear of the first gear pair 304 is movably sleeved on the input shaft 101, and the other gear of the first gear pair 304 is arranged on the intermediate shaft 103, and a second gear pair 305 is arranged between the output shaft 102 and the intermediate shaft 103, one gear of the second gear pair 305 is movably sleeved on the output shaft 102, and the other gear of the second gear pair 305 is arranged on the intermediate shaft 103. The input shaft 101 and the intermediate shaft 103 are in driving connection through the first gear pair 304, and the output shaft 102 and the intermediate shaft 103 are in driving connection through the second gear pair 305. The first clutch block 301 (realizing the function of the first clutch 105) of the switching dual clutch 3 is used for clutching the input shaft 101 with a gear of the first gear pair 304, and the second clutch block 302 (realizing the function of the second clutch 106) of the switching dual clutch 3 is used for clutching the input shaft 101 with a gear of the second gear pair 305. The first clutch block 301 and the second clutch block 302 of the switching dual clutch 3 are mutually exclusive clutches. Through the above-mentioned gear pair and the switching dual clutch 3, the power of the input shaft 101 can be transmitted to the intermediate shaft 103 or the output shaft 102. Through the different gear ratios of the gear pair set on the input shaft 101, the power of the input shaft 101 can be transmitted to the intermediate shaft 103 with different torques, and then the power is output to the output shaft 102 through the intermediate shaft 103; or the power of the input shaft 101 can be directly transmitted to the output shaft 102. By controlling the change of the torque in the power transmission process, the gear position change of the second gear transmission can be achieved.

[0038] In the embodiment, the piston unit can be pushed left and right respectively to make the clutch blocks on both sides engage and disengage. In this embodiment, the piston unit includes a double-headed piston body 303 and a cavity; the cross section of the double-headed piston body 303 is an I-shaped, one end of the double-headed piston body 303 is arranged in the cavity, and the other end of the double-headed piston body 303 is located outside the cavity, and the two ends of the cavity are respectively connected to the first hydraulic unit 306 and the second hydraulic unit 307. The double-headed piston body 303 will only push one clutch block to form a closed state with the gear pair, so that one of the switching dual clutches 3 will only be in a closed state with one gear pair, and be 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 303 outside the cavity and used to push the clutch blocks on both sides to engage and disengage, the lateral width of the double-headed piston body 303 is also reduced, thereby making the structure compact.

[0039] In the embodiment, in order to realize the clutch structure inside the clutch, the clutch mode of the friction plate can be adopted, the first clutch block 301 includes a first friction plate group 3011, the second clutch block 302 includes a second friction plate group 3021, the first friction plate group 3011 is located on one side of the other end of the double-headed piston body 303, and the second friction plate group 3021 is located on the other side of the other end of the double-headed piston body 303, the first clutch block 301 and the second clutch block 302 are used to be respectively arranged on the gear pairs on both sides, and the double-headed piston body 303 is used to drive one of the first friction plate group 3011 or the second friction plate group 3021 to engage and the other to separate. That is, the first clutch block 301 or the second clutch block 302 can be clutched by pushing the friction plate of the first clutch block 301 or the friction plate of the second clutch block 302 through the double-headed piston body 303.

[0040] In this embodiment, the double-headed piston body 303 is used to push the first friction plate group 3011 and the second friction plate group 3021. In order to provide power to the double-headed piston body 303, the two ends of the cavity of the switchable dual clutch 3 are respectively connected to the first hydraulic unit 306 and the second hydraulic unit 307 to drive the movement of the double-headed piston body 303. The first hydraulic unit 306 and the second hydraulic unit 307 are connected to the two ends of the cavity. Therefore, only by pressurizing the hydraulic oil in one side, the oil pressure in the cavity will be unbalanced, and then the double-headed piston body 303 will be driven to move to the other side in the cavity, so as to achieve the purpose of controlling the double-headed piston body 303 to move in the cavity through the oil pressure of the hydraulic oil.

[0041] In the embodiment, the multi-speed transmission 4 can be an existing transmission, and in some embodiments, it can be a four-speed transmission. The four-speed transmission includes: a four-speed input shaft 40, a four-speed output shaft 41, a four-speed intermediate shaft 42, a four-speed first clutch 43, a four-speed second clutch 44, a four-speed third clutch 45, a four-speed fourth clutch 46, and a four-speed housing 47; the center line of the four-speed input shaft is arranged in a colinear manner with the center line of the four-speed output shaft, the input end of the four-speed input shaft and the output end of the four-speed output shaft respectively penetrate the opposite two side walls of the four-speed housing and are arranged on the housing, the four-speed input shaft transmits power to the four-speed intermediate shaft through the four-speed first clutch or the four-speed second clutch, and then the four-speed intermediate shaft transmits power to the four-speed output shaft through the four-speed third clutch or the four-speed fourth clutch; the center line of the four-speed intermediate shaft is parallel to the center line of the four-speed input shaft and is arranged in the four-speed housing; the four-speed input shaft is in driving connection with the output shaft of the two-speed transmission. Through the four-speed transmission of the present invention, it can be combined with the two-speed transmission to form an eight-speed transmission to meet the needs of more gears.

[0042] 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. A compact hybrid vehicle system, characterized in that: It includes a two-speed transmission, a power motor, a multi-speed transmission and a power unit; The two-speed transmission comprises: an input shaft, an output shaft, an intermediate shaft, a first clutch, a second clutch, and a housing; The center line of the input shaft is colinear with the center line of the output shaft, 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 power unit is connected with the input shaft to transmit power to the input shaft, the input shaft transmits power to the intermediate shaft through the first clutch and then transmits power to the output shaft through the intermediate shaft, or the input shaft transmits power to the output shaft through the second clutch, and the center line of the intermediate shaft is parallel to the center line of the input shaft and is arranged in the housing; One end of the intermediate shaft is transmission-connected to the rotating end of the power motor, and the power motor is arranged outside the housing to drive the intermediate shaft to rotate, the input end of the multi-speed transmission is transmission-connected to the output end of the output shaft, and the output end of the multi-speed transmission is used to output power to the wheels; There are multiple intermediate shafts, and the intermediate shafts are arranged in a circular array around the center lines of the input shaft and the output shaft. The multiple intermediate shafts have the same structure, and each intermediate shaft is connected to a power motor; The first clutch and the second clutch are combined into a switchable double clutch structure, and the switchable double clutch includes 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, and the second clutch block is located on the other side of the piston unit. The piston unit is used to allow the first clutch block, the second clutch block and the piston unit to be clutched; A first gear pair is arranged between the input shaft and the 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 arranged on the intermediate shaft; a second gear pair is arranged between the output shaft and the intermediate shaft, one gear of the second gear pair is arranged on the intermediate shaft, and another gear of the second gear pair is arranged on the output shaft; the first clutch block is used for clutching the input shaft with one gear of the first gear pair, and the second clutch block is used for clutching the output shaft with the input shaft; the first clutch block and the second clutch block are mutually exclusive clutches; The piston unit comprises a double-headed piston body and a cavity; The cross section of the double-headed piston body is an I-shaped one, one end of the double-headed piston body is arranged in the cavity, 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 the first hydraulic unit and the second hydraulic unit; 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 first clutch block and the second clutch block are used to be respectively arranged on the gear pairs on both sides, and 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.

2. A compact hybrid vehicle system according to claim 1, characterized in that: The multi-speed transmission is a four-speed transmission.

3. A compact hybrid vehicle system according to claim 1, characterized in that: The power unit is an engine or a motor.

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