Tandem type hybrid transmission system

Abstract

The utility model provides a tandem type hybrid transmission system. The tandem type hybrid transmission system structurally comprises a power device, the power generation device is connected with the power device, and the power generation device is driven by the power device to generate power; the driving motor is connected with the power generation device; the gearbox part is in transmission connection with the driving motor, and the gearbox part is in transmission connection with a front axle and a rear axle of the tractor; and the pump assembly is assembled on the power take-off port of the power device. The tandem type hybrid transmission system can solve the problems that gears of an existing hinge type tractor are many, the rotating speed of an engine is prone to being affected, and then the operation quality of the tractor is affected.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural machinery, and in particular to a series hybrid transmission system. Background Art

[0002] At present, medium and large horsepower tractors, especially medium and large horsepower articulated tractors, basically use engines and gearboxes to achieve power output. Gearboxes include the currently used power shift box and continuously variable transmission gearbox. Due to the diversity of tractor operating conditions, the operating speeds corresponding to typical conditions are also quite different. Frequent gear shifting is required to change the gear ratio of the gearbox to make the engine at a relatively economical and efficient speed. Therefore, the forward gears of the power shift gearbox usually exceed ten. At the same time, the wet clutch components of the power shift tractor are more demanding on the use conditions, the number of clutch components is large, the shifting strategy is complex, and the design, control and manufacturing of the gearbox are complex. Although the continuously variable transmission gearbox reduces the number of gears for power shifting, the design and control of the high-pressure, high-efficiency pump motor and planetary mechanism coupling are difficult. At present, it is only produced as a prototype and has no mature application.

[0003] In addition, when the working pump is connected to the engine directly or through a gearbox, when the engine changes gear or the power output load changes, the engine speed is affected, which will cause the flow of the working pump to fluctuate and affect the operating quality of the tractor. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a series hybrid transmission system to solve the problem that the existing articulated tractors have many gears and the engine speed is easily affected, thereby affecting the operation quality of the tractor.

[0005] According to the utility model, a series hybrid transmission system is provided, wherein the series hybrid transmission system includes: a power device; a power generation device connected to the power device, the power generation device is driven by the power device to generate electricity; a drive motor connected to the power generation device; a gearbox part, drivingly connected to the drive motor, the gearbox part is drivingly connected to the front axle and the rear axle of the tractor; and a pump assembly, which is assembled on the power take-off port of the power device.

[0006] Preferably, the power generation device and the power generation device control unit, the power distribution unit, the drive motor controller and the drive motor are connected in series in sequence, and the power distribution unit is connected in parallel with the energy storage unit.

[0007] Preferably, the gearbox portion includes a first gearbox structure, which includes a first input shaft, a first output shaft, a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear, a seventh gear, a driving wheel, a first synchronous assembly and a first clutch assembly. The drive motor is coaxially arranged with the first output shaft, the fourth gear is fixedly connected with the first input shaft, the first gear and the second gear are assembled to the first input shaft through bearings, the first clutch assembly is installed on the first input shaft, the third gear is connected with the driven plate group of the first clutch assembly and assembled to the first input shaft through bearings, the friction plate group of the first clutch assembly is fixedly connected with the first input shaft, the fifth gear, the sixth gear and the seventh gear are fixedly connected with the first output shaft, the driving wheel is connected with the drive motor, the driving wheel is meshed with the fourth gear, the third gear is meshed with the seventh gear, the second gear is meshed with the sixth gear, the first gear is meshed with the fifth gear, the first synchronous assembly is installed on the first input shaft, the first synchronous assembly is arranged between the first gear and the second gear, and the two ends of the first output shaft are respectively connected to the front axle and the rear axle in driving connection.

[0008] Preferably, the driving motor and the driving wheel form a hollow structure, and the end of the first output shaft passes through the hollow structure of the driving motor and the driving wheel to be drivingly connected to the front axle.

[0009] Preferably, when the transmission part adopts the first transmission structure, the auxiliary power output shaft of the tractor is transmission-connected to the power device through a second clutch assembly.

[0010] Preferably, the gearbox portion further includes a second gearbox structure, which includes a second input shaft, a second output shaft, a first clutch group, a second clutch group, a sun gear, a planet carrier, an inner ring gear, an eighth gear, a ninth gear, a second synchronizer assembly, a tenth gear and an eleventh gear, the first clutch group is connected to the drive motor and the sun gear, the second clutch group is connected to the inner ring gear, and the inner ring gear is fixed when the second clutch group is combined, the planet carrier is drivingly connected to the sun gear and the inner ring gear, the second input shaft is connected to the planet carrier, the eighth gear and the ninth gear are assembled to the second input shaft through bearings, the second synchronizer assembly is installed on the second input shaft, and the second synchronizer assembly is arranged between the eighth gear and the ninth gear, the tenth gear and the eleventh gear are fixedly connected to the second output shaft, the tenth gear is meshed with the eighth gear, and the eleventh gear is meshed with the ninth gear, and both ends of the second output shaft are drivingly connected to the front axle and the rear axle respectively.

[0011] Preferably, when the gearbox portion adopts the second gearbox structure, the auxiliary power output shaft of the tractor is transmission-connected to the power device via a third clutch assembly.

[0012] Preferably, the power generation device is formed with a hollow structure, and the third clutch assembly is transmission-connected to the power device via a transmission shaft penetrating through the hollow structure of the power generation device.

[0013] Preferably, the gearbox portion further includes a third gearbox structure, which includes a third input shaft, a third output shaft, a twelfth gear, a thirteenth gear, a fourteenth gear, a fifteenth gear, a sixteenth gear, a seventeenth gear, a fourth clutch assembly and a third synchronous assembly, the drive motor is connected to the third input shaft, the fourth clutch assembly is mounted on the third input shaft, the twelfth gear is connected to the driven plate group of the fourth clutch assembly and is assembled to the third input shaft through a bearing, the friction plate group of the fourth clutch assembly is fixedly connected to the third input shaft, the thirteenth gear and the fourteenth gear are assembled to the third input shaft through a bearing, the third synchronous assembly is mounted on the third input shaft, the third synchronous assembly is arranged between the thirteenth gear and the fourteenth gear, the fifteenth gear, the sixteenth gear and the seventeenth gear are fixedly connected to the third output shaft, the fifteenth gear is meshed with the twelfth gear, the sixteenth gear is meshed with the thirteenth gear, the seventeenth gear is meshed with the fourteenth gear, and both ends of the third output shaft are drivingly connected to the front axle and the rear axle respectively.

[0014] Preferably, when the gearbox portion adopts the third gearbox structure, the auxiliary power output shaft of the tractor is transmission-connected with the third input shaft via a fifth clutch assembly.

[0015] The series hybrid transmission system of the embodiment of the utility model has a generator connected to a power device, and the generator is driven to generate electricity by the power device. The drive motor is connected to the generator, so that the drive motor and the power device are connected in series. The gearbox is connected to the drive motor in a transmission manner to achieve decoupling of the power device speed and the gearbox speed, so that the power device can work in an economic fuel consumption range. In addition, since the speed range of the drive motor is large, it can be achieved that the gearbox does not shift under a typical operating condition, so that the gear position of the gearbox can be reduced. The gearbox is connected to the front and rear axles of the tractor in a transmission manner, and the power of the drive motor is output to the front and rear axles. The pump assembly is assembled on the power take-off port of the power device. In this way, when the load changes, the power of the drive motor changes to meet the operating requirements, and the speed of the power device is basically unaffected, so that the flow rate of the pump assembly changes less, avoiding affecting the operating quality of the tractor. In this way, it can effectively solve the problem that the existing articulated tractors have many gears and the engine speed is easily affected, thereby affecting the operating quality of the tractor.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of a first gearbox structure applied to the gearbox portion of a series hybrid transmission system according to the utility model.

[0019] Figure 2 It is a schematic diagram of a second gearbox structure applied to the gearbox portion of the series hybrid transmission system according to the present utility model.

[0020] Figure 3 It is a schematic diagram of a third gearbox structure applied to the gearbox portion of the series hybrid transmission system according to the utility model.

[0021] Figure 4 It is a schematic diagram of a fourth gearbox structure applied to the gearbox portion of the series hybrid transmission system according to the present utility model.

[0022] Figure 5 It is a schematic diagram of a fifth gearbox structure applied to the gearbox portion of the series hybrid transmission system according to the present utility model.

[0023] Figure numerals: 1-first gear; 2-second gear; 3-third gear; 4-fourth gear; 5-fifth gear; 6-sixth gear; 7-seventh gear; 8-eighth gear; 9-ninth gear; 10-tenth gear; 11-eleventh gear; 12-twelfth gear; 13-thirteenth gear; 14-fourteenth gear; 15-fifteenth gear; 16-sixteenth gear; 17-seventeenth gear; 18-driving wheel; 19-sun gear; 20-planet carrier; 21-inner ring gear; 100-power device; 201-generator; 300-drive motor; 301-first motor; 302-second motor; 303-third motor; 304-fourth motor; 401-gearbox Part; 501-pump assembly; 601-auxiliary power output shaft; 101-first input shaft; 102-first output shaft; 103-second input shaft; 104-second output shaft; 105-third input shaft; 106-third output shaft; 107-first synchronous assembly; 108-second synchronous assembly; 109-third synchronous assembly; 111-first clutch assembly; 112-second clutch assembly; 113-third clutch assembly; 114-fourth clutch assembly; 115-fifth clutch assembly; 116-first clutch component group; 117-second clutch component group; 120-power generation device control unit; 121-power distribution unit; 122-energy storage unit; 123-drive motor controller. DETAILED DESCRIPTION

[0024] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0025] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0026] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0027] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0028] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0029] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0030] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0031] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0032] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0033] like Figures 1 to 5 As shown, according to the present invention, a series hybrid transmission system is provided, which includes a power device 100 , a power generation device 201 , a drive motor 300 , a gearbox part 401 and a pump assembly 501 .

[0034] In the following description, reference will be made to Figures 1 to 5 The specific structures of the above components of the series hybrid transmission system and the connection relationship of the above components are specifically described.

[0035] like Figures 1 to 3As shown, in an embodiment, the power generation device 201 (which can be a generator) can be connected to the power device 100 (which can be an engine), and the power generation device 201 can be driven by the power device 100 to generate electricity. The drive motor 300 can be connected to the power generation device 201, so that the drive motor 300 is connected in series with the power device 100. The gearbox part 401 can be connected to the drive motor 300 in a transmission manner, thereby realizing the decoupling of the speed of the power device 100 from the speed of the gearbox part 401, so that the power device 100 can work in an economic fuel consumption range. In addition, since the speed range of the drive motor 300 is large, it can be realized that the gearbox part 401 does not shift under a typical operating condition, thereby reducing the number of gears required for the gearbox part 401, reducing costs and manufacturing difficulties. The gearbox part 401 can be connected to the front axle and rear axle of the tractor in a transmission manner to output the power of the drive motor 300 to the front axle and rear axle. The pump assembly 501 and other pumps required for the hydraulic system can be installed on the power take-off port of the power unit 100. With such an arrangement, when the load changes, the power change of the drive motor 300 can meet the operating requirements, and the rotation speed of the power unit 100 is basically unaffected, so that the flow rate of the pump assembly 501 (which can be a working pump and other pumps required for the hydraulic system) changes less, thereby avoiding affecting the operating quality of the tractor.

[0036] Preferably, in the embodiment, the gearbox part 401 may include a variety of box types, that is, the transmission structure inside the gearbox part 401 may be of various types. Figure 1 As shown, the gearbox part 401 may include a first gearbox structure. The first gearbox structure may include a first input shaft 101, a first output shaft 102, a first gear 1, a second gear 2, a third gear 3, a fourth gear 4, a fifth gear 5, a sixth gear 6, a seventh gear 7, a driving wheel 18, a first synchronization component 107, and a first clutch component 111.

[0037] Specifically, in the embodiment, the fourth gear 4 can be fixedly connected to the first input shaft 101. The first gear 1 and the second gear 2 can be assembled to the first input shaft 101 through a bearing. The first clutch assembly 111 is installed on the first input shaft 101, and the third gear 3 is connected to the driven plate group of the first clutch assembly 111 and assembled to the first input shaft 101 through a bearing. The friction plate group of the first clutch assembly 111 is fixedly connected to the first input shaft 101. The fifth gear 5, the sixth gear 6 and the seventh gear 7 are fixedly connected to the first output shaft 102. The driving wheel 18 is key-connected with the driving motor 300. The driving wheel 18 is meshed with the fourth gear 4, the third gear 3 is meshed with the seventh gear 7, the second gear 2 is meshed with the sixth gear 6, and the first gear 1 is meshed with the fifth gear 5. The driving motor 300 can be coaxially arranged with the first output shaft 102. Preferably, the driving motor 300 and the driving wheel 18 can have a hollow structure (can be provided with a through hole). The first synchronization assembly 107 can be installed on the first input shaft 101. The first synchronization component 107 can be arranged between the first gear 1 and the second gear 2, and is used to drive the first gear 1 or the second gear 2 to the first input shaft 101. The two ends of the first output shaft 102 can be respectively connected to the front axle and the rear axle of the tractor. Specifically, the two ends of the first output shaft 102 can be connected to the transmission shaft, and the front end of the first output shaft 102 (which can be Figure 1 The transmission shaft of the first output shaft 102 (the left end in the middle) can pass through the hollow structure of the driving motor 300 and the driving wheel 18, and be connected to the front axle of the tractor. Figure 1 The transmission shaft of the transmission unit 300 (left end) can be connected to the rear axle of the tractor. With this arrangement, the drive motor 300 and the gearbox unit 401 can be arranged at the lower part of the power device 100 and the power generation device 201. With this arrangement, on the one hand, the layout structure of the entire machine in the length direction is more compact, which can effectively reduce the length of the entire machine; on the other hand, the drive motor 300 and the gearbox unit 401 can be directly repaired from the bottom by removing the bottom protective plate of the tractor during maintenance, thereby reducing the difficulty of maintenance. In addition, the first input shaft 101 and the first output shaft 102 in the gearbox unit 401 are arranged in parallel, so that the overall structure of the gearbox unit 401 is relatively simple and easy to process.

[0038] In addition, if Figure 1As shown, in the embodiment, when the gearbox part 401 applies the first gearbox structure, the auxiliary power output shaft 601 (PTO shaft) of the tractor can be connected to the power device 100 through the second clutch assembly 112. Specifically, the power generation device 201 can be provided with a hollow position, and the transmission shaft can pass through the hollow position of the power generation device 201 and connect to the power device 100. The transmission shaft is connected to the friction plate group of the second clutch assembly 112. The auxiliary power output shaft 601 is connected to the driven plate group of the second clutch assembly 112 through gears. In this way, the auxiliary power output shaft 601 is directly driven by the power device 100. The power generation device 201 can be connected in series with the power generation device control unit 120 (GCU), the power distribution unit 121 (PDU), the drive motor controller 123 (MCU) and the drive motor 300, and the energy storage unit 122 can be connected in parallel with the power distribution unit 121.

[0039] Preferably, Figure 2 As shown, the gearbox portion 401 may further include a second gearbox structure. The second gearbox structure may include a second input shaft 103, a second output shaft 104, a first clutch component group 116 (i.e., a clutch group), a second clutch component group 117 (i.e., a clutch group), a sun gear 19, a planet carrier 20, an inner ring gear 21, an eighth gear 8, a ninth gear 9, a second synchronizer assembly 108, a tenth gear 10, and an eleventh gear 11.

[0040] Specifically, the first clutch component group 116 can be connected to the drive motor 300 and the sun gear 19 through a shaft. The second clutch component group 117 can be rigidly connected to the inner gear ring 21, and the inner gear ring 21 is fixed when the second clutch component group 117 is combined. The planet carrier 20 is connected to the sun gear 19 and the inner gear ring 21 through planetary gear transmission. The second input shaft 103 can be connected to the planet carrier 20. The eighth gear 8 and the ninth gear 9 can be assembled on the second input shaft 103 through bearings. The second synchronous assembly 108 can be installed on the second input shaft 103. The second synchronous assembly 108 is arranged between the eighth gear 8 and the ninth gear 9, and is used to drive the eighth gear 8 or the ninth gear 9 to the second input shaft 103. The tenth gear 10 and the eleventh gear 11 can be fixedly connected to the second output shaft 104. The tenth gear 10 is meshed with the eighth gear 8, and the eleventh gear 11 is meshed with the ninth gear 9. The two ends of the second output shaft 104 can be respectively connected to the front axle and the rear axle of the tractor.

[0041] In addition, if Figure 2As shown, in the embodiment, when the gearbox part 401 applies the second gearbox structure, the auxiliary power output shaft 601 (PTO shaft) of the tractor can be connected to the power device 100 through the third clutch assembly 113. Specifically, the power generation device 201 can be provided with a hollow position, and the transmission shaft can pass through the hollow position of the power generation device 201 and connect to the power device 100. The transmission shaft is connected to the friction plate group of the third clutch assembly 113. The auxiliary power output shaft 601 is connected to the driven plate group of the third clutch assembly 113 through gears. In this way, the auxiliary power output shaft 601 is directly driven by the power device 100. The power generation device 201 can be connected in series with the power generation device control unit 120 (GCU), the power distribution unit 121 (PDU), the drive motor controller 123 (MCU) and the drive motor 300, and the energy storage unit 122 can be connected in parallel with the power distribution unit 121.

[0042] Preferably, Figure 3 As shown, the gearbox portion 401 may further include a third gearbox structure. The third gearbox structure may include a third input shaft 105, a third output shaft 106, a twelfth gear 12, a thirteenth gear 13, a fourteenth gear 14, a fifteenth gear 15, a sixteenth gear 16, a seventeenth gear 17, a fourth clutch assembly 114, and a third synchronization assembly 109.

[0043] Specifically, the driving motor 300 is connected to the third input shaft 105. The fourth clutch assembly 114 can be installed on the third input shaft 105. The twelfth gear 12 can be connected to the driven plate group of the fourth clutch assembly 114 and assembled to the third input shaft 105 through a bearing. The friction plate group of the fourth clutch assembly 114 can be fixedly connected to the third input shaft 105. The thirteenth gear 13 and the fourteenth gear 14 can be assembled to the third input shaft 105 through a bearing. The third synchronization assembly 109 can be installed on the third input shaft 105. The third synchronization assembly 109 can be arranged between the thirteenth gear 13 and the fourteenth gear 14, and is used to drive the thirteenth gear 13 or the fourteenth gear 14 to the third input shaft 105. The fifteenth gear 15, the sixteenth gear 16 and the seventeenth gear 17 can be fixedly connected to the third output shaft 106. The fifteenth gear 15 is meshed with the twelfth gear 12, the sixteenth gear 16 is meshed with the thirteenth gear 13, and the seventeenth gear 17 is meshed with the fourteenth gear 14. Both ends of the third output shaft 106 can be drivingly connected to the front axle and the rear axle of the tractor respectively.

[0044] In addition, if Figure 3As shown, in the embodiment, when the gearbox part 401 adopts the third gearbox structure, the auxiliary power output shaft 601 of the tractor is connected to the third input shaft 105 through the fifth clutch assembly 115. Specifically, the third input shaft 105 can be connected to the friction plate group of the fifth clutch assembly 115 through a transmission shaft. The auxiliary power output shaft 601 is connected to the driven plate group of the fifth clutch assembly 115 through a gear. In this way, the auxiliary power output shaft 601 is driven by the drive motor 300. The power generation device 201 can be connected in series with the power generation device control unit 120 (GCU), the power distribution unit 121 (PDU), the drive motor controller 123 (MCU) and the drive motor 300, and the energy storage unit 122 can be connected in parallel with the power distribution unit 121.

[0045] Preferably, but not limited to this, each synchronization component in the above embodiments can also be replaced by two clutch components, or the clutch component can be replaced by a synchronization component with a gear set on one side.

[0046] In addition, preferably, Figure 4 As shown, in an embodiment, the gearbox part 401 may further include a fourth gearbox structure. The transmission structure in the fourth gearbox structure is substantially the same as the transmission structure in the third gearbox structure, with only a difference in the selection of the synchronization component and the clutch component, which will not be repeated here. In the case where the gearbox part 401 applies the fourth gearbox structure, the first motor 301 and the second motor 302 may be respectively installed at both ends of the input shaft of the gearbox part 401, and the first motor 301 and the second motor 302 are respectively connected to the drive motor controller 123 by wires, that is, dual motor input is realized. For high-power tractors, a single high-power motor can be replaced by two low-power motors, thereby reducing manufacturing difficulty and cost. The pump assembly 501 and the pump used in other hydraulic systems can be connected to the second motor 302.

[0047] More preferably, Figure 5As shown, in an embodiment, the gearbox part 401 may also include a fifth gearbox structure. The transmission structure in the fifth gearbox structure is roughly similar to the transmission structure in the third gearbox structure, and will not be repeated here. In the case where the gearbox part 401 applies the fifth gearbox structure, a first-level gear transmission structure may be added to the front end of the input shaft of the gearbox part 401. The gearbox part 401 can still be a dual-motor input, and the drive motor controller 123 may be connected to the third motor 303 and the fourth motor 304 respectively. The third motor 303 and the fourth motor 304 may be connected to two driving wheels respectively, and both driving wheels are meshed with driven gears, and the driven gears are connected to the input shaft of the gearbox part 401. The third motor 303 and the fourth motor 304 may be high-speed drive motors, and the two realize speed reduction and torque increase through gear transmission, and then input power to the input shaft of the gearbox part 401, ensuring that the torque and power of the input shaft of the gearbox part 401 remain unchanged 1 At the same time, the size and cost of the motor are further reduced.

[0048] Further, in the embodiment, when the gearbox portion 401 adopts the first gearbox structure, as Figure 1 As shown, the selected gears of the tractor include a first neutral gear, a first forward first gear, a first forward second gear, a first forward third gear and a first reverse gear.

[0049] Specifically, when the first neutral gear is selected, the driving motor 300 may stop working, and the whole machine controls the first clutch assembly 111 to be disengaged, and the first synchronization assembly 107 is in the middle position.

[0050] When the first forward gear is selected, the whole machine controls the first clutch assembly 111 to engage and the first synchronization assembly 107 to be in the middle position. The driving motor 300 transmits the power to the driving wheel 18 and the fourth gear 4 in sequence, and then drives the first input shaft 101. The third gear 3 is connected to the first input shaft 101 through the first clutch assembly 111. The power is transmitted from the fourth gear 4 to the third gear 3, and then to the seventh gear 7, driving the first output shaft 102 to rotate, and transmitting the power to the front axle and the rear axle to realize driving.

[0051] When the first forward second gear is selected, the whole machine controls the first clutch assembly 111 to be disengaged and the first synchronization assembly 107 to be combined with the second gear 2. The driving motor 300 transmits the power to the driving wheel 18 and the fourth gear 4 in sequence, and then drives the first input shaft 101. The second gear 2 is connected to the first input shaft 101 through the first synchronization assembly 107. The power is transmitted from the fourth gear 4 to the second gear 2, and then to the sixth gear 6, driving the first output shaft 102 to rotate, and transmitting the power to the front axle and the rear axle to realize driving.

[0052] When the first forward third gear is selected, the whole machine controls the first clutch assembly 111 to be disengaged and the first synchronization assembly 107 to be combined with the first gear 1. The driving motor 300 transmits the power to the driving wheel 18 and the fourth gear 4 in sequence, and then drives the first input shaft 101. The first gear 1 is connected to the first input shaft 101 through the first synchronization assembly 107. The power is transmitted from the fourth gear 4 to the first gear 1, and then to the fifth gear 5, driving the first output shaft 102 to rotate, and transmitting the power to the front axle and the rear axle to realize driving.

[0053] When the first reverse gear is selected, the drive motor 300 rotates in the reverse direction, and each gear is the same as the above-mentioned forward gear, which will not be described in detail here.

[0054] In the embodiment, when the gearbox portion 401 adopts the second gearbox structure, as shown in FIG. Figure 2 As shown, the selected gears of the tractor include a second forward first gear, a second forward second gear, a second forward third gear and a second forward fourth gear.

[0055] When the second forward first gear is selected, the whole machine controls the first clutch component group 116 to engage, the second clutch component group 117 to disengage, and the second synchronous assembly 108 to engage with the eighth gear 8. The power of the drive motor 300 is transmitted to the sun gear 19. Since the first clutch component group 116 is engaged, the inner ring gear 21 is rigidly connected to the sun gear 19, and the planetary mechanism is connected to form a whole. The power of the drive motor 300 is directly transmitted to the planet carrier 20, and the planet carrier 20 has the same speed as the drive motor 300. Then the power is transmitted to the second input shaft 103. The eighth gear 8 is connected to the second input shaft 103 through the second synchronous assembly 108, so that the power is transmitted to the eighth gear 8, the tenth gear 10 and the second output shaft 104 in sequence, and then the power is transmitted to the front axle and the rear axle to realize driving.

[0056] When the second forward second gear is selected, the whole machine controls the first clutch component group 116 to engage, the second clutch component group 117 to disengage, and the second synchronizer assembly 108 to engage with the ninth gear 9. The power of the drive motor 300 is transmitted to the sun gear 19. Since the first clutch component group 116 is engaged, the inner gear ring 21 is rigidly connected to the sun gear 19, and the planetary mechanism is connected to form a whole. The power of the drive motor 300 is directly transmitted to the planet carrier 20, and the planet carrier 20 has the same speed as the drive motor 300. Then the power is transmitted to the second input shaft 103. The ninth gear 9 is connected to the second input shaft 103 through the second synchronizer assembly 108, so that the power is transmitted to the ninth gear 9, the eleventh gear 11 and the second output shaft 104 in sequence, and then the power is transmitted to the front axle and the rear axle to realize driving.

[0057] When the second forward third gear is selected, the whole machine controls the first clutch group 116 to be disengaged, the second clutch group 117 to be engaged, and the second synchronous assembly 108 to be engaged with the eighth gear 8. The power of the drive motor 300 is transmitted to the sun gear 19. Since the inner ring gear 21 is fixed when the second clutch group 117 is engaged. The planetary mechanism is a structure with the sun gear 19 input and the planet carrier 20 output. The power is transmitted to the second input shaft 103. The eighth gear 8 is connected to the second input shaft 103 through the second synchronous assembly 108, so that the power is transmitted to the eighth gear 8, the tenth gear 10 and the second output shaft 104 in sequence, and then the power is transmitted to the front axle and the rear axle to realize driving.

[0058] When the second forward fourth gear is selected, the whole machine controls the first clutch group 116 to be disengaged, the second clutch group 117 to be engaged, and the second synchronous assembly 108 to be engaged with the ninth gear 9. The power of the drive motor 300 is transmitted to the sun gear 19. Since the inner ring gear 21 is fixed when the second clutch group 117 is engaged. The planetary mechanism is a structure with the sun gear 19 input and the planet carrier 20 output. The power is transmitted to the second input shaft 103. The ninth gear 9 is connected to the second input shaft 103 through the second synchronous assembly 108, so that the power is transmitted to the ninth gear 9, the eleventh gear 11 and the second output shaft 104 in sequence, and then the power is transmitted to the front axle and the rear axle to realize driving.

[0059] In the embodiment, when the gearbox portion 401 adopts the third gearbox structure, as shown in FIG. Figure 3 As shown, the selectable gears of the tractor include a third neutral gear, a third forward first gear, a third forward second gear, a third forward third gear and a third reverse gear;

[0060] Specifically, when the third neutral gear is selected, the driving motor 300 may stop working, and the whole machine controls the fourth clutch assembly 114 to be disengaged, and the third synchronization assembly 109 is in the middle position.

[0061] When the third forward first gear is selected, the whole machine controls the fourth clutch assembly 114 to engage and the third synchronization assembly 109 to be in the middle position. The driving motor 300 drives the third input shaft 105 to rotate. The twelfth gear 12 is connected to the third input shaft 105 through the fourth clutch assembly 114, so that the power is transmitted to the twelfth gear 12 and the fifteenth gear 15 in sequence, and finally drives the third output shaft 106 to rotate, and then transmits the power to the front axle and the rear axle to realize driving.

[0062] When the third forward second gear is selected, the whole machine controls the fourth clutch assembly 114 to be disengaged, and the third synchronization assembly 109 is engaged with the thirteenth gear 13. The driving motor 300 drives the third input shaft 105 to rotate. The thirteenth gear 13 is connected to the third input shaft 105 through the third synchronization assembly 109, so that the power is transmitted to the thirteenth gear 13 and the sixteenth gear 16 in sequence, and finally drives the third output shaft 106 to rotate, and then transmits the power to the front axle and the rear axle to realize driving.

[0063] When the third forward gear is selected, the whole machine controls the fourth clutch assembly 114 to be disengaged and the third synchronization assembly 109 to be engaged with the fourteenth gear 14. The driving motor 300 drives the third input shaft 105 to rotate. The fourteenth gear 14 is connected to the third input shaft 105 through the third synchronization assembly 109, so that the power is sequentially transmitted to the fourteenth gear 14 and the seventeenth gear 17, and finally drives the third output shaft 106 to rotate, and then transmits the power to the front axle and the rear axle to realize driving.

[0064] When the third reverse gear is selected, the drive motor 300 rotates in the reverse direction, and each gear is the same as the above-mentioned forward gear, which will not be described in detail here.

[0065] During use, the driving motor 300 of the series hybrid transmission system is connected in series with the power device 100, and the gearbox part 401 is connected to the driving motor 300 in a transmission manner, thereby realizing the decoupling of the speed of the power device 100 from the speed of the gearbox part 401, so that the power device 100 can work in an economic fuel consumption range. In addition, since the speed range of the driving motor 300 is large, it is possible to achieve that the gearbox part 401 does not shift under a typical operating condition, thereby reducing the gears required for the gearbox part 401, reducing costs and manufacturing difficulties. The pump assembly 501 and other pumps required for the hydraulic system are assembled on the power take-off port of the power device 100. In this arrangement, when the load changes, the power change of the driving motor 300 can meet the operating requirements, and the speed of the power device 100 is basically unaffected, so that the flow change of the pump assembly 501 is small, avoiding affecting the operating quality of the tractor.

[0066] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A series hybrid transmission system for a tractor, characterized in that: The hybrid transmission system comprises: Power plant; A power generation device connected to the power device, the power generation device is driven by the power device to generate electricity; A driving motor connected to the power generation device; a gearbox part, drivingly connected to the drive motor, the gearbox part drivingly connected to the front axle and the rear axle of the tractor; and The pump assembly is assembled on the power take-off port of the power device.

2. The series hybrid transmission system according to claim 1, characterized in that: The power generation device and the power generation device control unit, the power distribution unit, the drive motor controller and the drive motor are connected in series in sequence, and the power distribution unit is connected in parallel with the energy storage unit.

3. The series hybrid transmission system according to claim 1, characterized in that: The gearbox portion includes a first gearbox structure, which includes a first input shaft, a first output shaft, a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear, a seventh gear, a driving wheel, a first synchronous assembly and a first clutch assembly. The drive motor is coaxially arranged with the first output shaft, the fourth gear is fixedly connected with the first input shaft, the first gear and the second gear are assembled to the first input shaft through a bearing, the first clutch assembly is installed on the first input shaft, the third gear is connected with the driven plate group of the first clutch assembly and assembled to the first input shaft through a bearing, the friction plate group of the first clutch assembly is fixedly connected with the first input shaft, the fifth gear, the sixth gear and the seventh gear are fixedly connected with the first output shaft, the driving wheel is connected with the drive motor, the driving wheel is meshed with the fourth gear, the third gear is meshed with the seventh gear, the second gear is meshed with the sixth gear, the first gear is meshed with the fifth gear, the first synchronous assembly is installed on the first input shaft, the first synchronous assembly is arranged between the first gear and the second gear, and both ends of the first output shaft are respectively connected to the front axle and the rear axle in driving connection.

4. The series hybrid transmission system according to claim 3, characterized in that: The driving motor and the driving wheel form a hollow structure, and the end of the first output shaft passes through the hollow structure of the driving motor and the driving wheel and is drivingly connected to the front axle.

5. The series hybrid transmission system according to claim 3, characterized in that: In the case where the transmission part adopts the first transmission structure, the auxiliary power output shaft of the tractor is transmission-connected with the power device through the second clutch assembly.

6. The series hybrid transmission system according to claim 1, characterized in that: The gearbox portion also includes a second gearbox structure, which includes a second input shaft, a second output shaft, a first clutch group, a second clutch group, a sun gear, a planet carrier, an inner ring gear, an eighth gear, a ninth gear, a second synchronizer assembly, a tenth gear and an eleventh gear. The first clutch group is connected to the drive motor and the sun gear, the second clutch group is connected to the inner ring gear, and the inner ring gear is fixed when the second clutch group is combined. The planet carrier is drivingly connected to the sun gear and the inner ring gear. The second input shaft is connected to the planet carrier. The eighth gear and the ninth gear are assembled to the second input shaft through bearings. The second synchronizer assembly is installed on the second input shaft. The second synchronizer assembly is arranged between the eighth gear and the ninth gear. The tenth gear and the eleventh gear are fixedly connected to the second output shaft. The tenth gear is meshed with the eighth gear, and the eleventh gear is meshed with the ninth gear. Both ends of the second output shaft are drivingly connected to the front axle and the rear axle respectively.

7. The series hybrid transmission system according to claim 6, characterized in that: In the case where the gearbox portion adopts the second gearbox structure, the auxiliary power output shaft of the tractor is transmission-connected to the power device through the third clutch assembly.

8. The series hybrid transmission system according to claim 7, characterized in that: The power generation device is formed with a hollow structure, and the third clutch assembly is transmission-connected to the power device via a transmission shaft penetrating through the hollow structure of the power generation device.

9. The series hybrid transmission system according to claim 1, characterized in that: The gearbox part also includes a third gearbox structure, which includes a third input shaft, a third output shaft, a twelfth gear, a thirteenth gear, a fourteenth gear, a fifteenth gear, a sixteenth gear, a seventeenth gear, a fourth clutch assembly and a third synchronous assembly. The drive motor is connected to the third input shaft, the fourth clutch assembly is installed on the third input shaft, the twelfth gear is connected to the driven plate group of the fourth clutch assembly and is assembled to the third input shaft through a bearing, the friction plate group of the fourth clutch assembly is fixedly connected to the third input shaft, the thirteenth gear and the fourteenth gear are assembled to the third input shaft through a bearing, the third synchronous assembly is installed on the third input shaft, the third synchronous assembly is arranged between the thirteenth gear and the fourteenth gear, the fifteenth gear, the sixteenth gear and the seventeenth gear are fixedly connected to the third output shaft, the fifteenth gear is meshed with the twelfth gear, the sixteenth gear is meshed with the thirteenth gear, the seventeenth gear is meshed with the fourteenth gear, and both ends of the third output shaft are drivingly connected to the front axle and the rear axle respectively.

10. The series hybrid transmission system according to claim 9, characterized in that: In the case where the gearbox portion adopts the third gearbox structure, the auxiliary power output shaft of the tractor is transmission-connected with the third input shaft via the fifth clutch assembly.

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