Multi-gear tractor gearbox

Abstract

The utility model discloses a multi-gear tractor gearbox which comprises the following components: a power reversing system which is used for providing power output for switching forward and backward directions; the main speed change system is in power connection with the power reversing system and provides power output of six gears; the auxiliary speed change system is in power connection with the main speed change system and provides power output of four gears; the gear switching system is in power connection with the auxiliary speed change system and is used for performing power switching between a high gear and a low gear for the power provided by the auxiliary speed change system; power input into the gearbox sequentially passes through the power reversing system, the main speed change system, the auxiliary speed change system and the gear switching system and then is transmitted to a rear axle of the vehicle. In this way, output of 48 gears of 6 * 4 * 2 = 48 can be formed through permutation and combination of the components, and the gearbox adopts different output modes when coping with different working conditions. In addition, according to the scheme, the synchronizer and the clutch are combined, and control can be simpler.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor gearbox field especially relates to a multi -gear tractor gearbox. BACKGROUND

[0002] Tractor needs to face many different working conditions in actual work, including walking, ploughing and ridging operation mode;And the working environment of tractor is also changing at any time when working, including paddy field, dry field and mud day operation environment;And tractor will appear the situation of getting stuck when working due to the length of time. SUMMARY

[0003] In order to solve the problem of less working gear of tractor gearbox in prior art, the utility model discloses a multi -gear tractor gearbox, which can form 6x4x2=48 gear output, so that the tractor can cope with various working conditions.

[0004] In order to realize the above purpose, the utility model adopts the following technical scheme: a multi -gear tractor gearbox, comprising the following parts: power reversing system, for providing the power output of switching forward and backward direction;Main transmission system, which is connected with the power reversing system and provides six gear power output;Auxiliary transmission system, which is connected with the main transmission system and provides four gear power output;Gear shifting system, which is connected with the auxiliary transmission system and provides high gear and low gear power switching for the power provided by the auxiliary transmission system;The power of input gearbox is transmitted to the rear axle of the vehicle in turn after passing through the power reversing system, the main transmission system, the auxiliary transmission system and the gear shifting system.

[0005] As a preferred, the power reversing system includes a front box, and an input shaft, a first gear, a second gear, a third gear, a reverse gear and a bidirectional clutch installed in the front box, the power of the input shaft can be connected with the first gear or the reverse gear through the bidirectional clutch, the first gear and the second gear are engaged transmission, the second gear and the third gear are engaged transmission, the third gear and the forward gear are fixedly connected, and the reverse gear and the forward gear are engaged transmission.

[0006] As preferred, the main transmission system comprises a main transmission box, and a first transmission shaft and a second transmission shaft are rotatably installed on the main transmission box; a first synchronizer, a fourth gear, a sixth gear, a second synchronizer, an eighth gear, an eleventh gear and a main transmission output gear are installed on the first transmission shaft, the fourth gear, the sixth gear, the sixth gear and the eighth gear are all loose-jointed on the first transmission shaft, the eleventh gear and the main transmission output gear are both fixed on the first transmission shaft, the forward gear and the fourth gear can be in transmission connection with the first transmission shaft through the first synchronizer, the sixth gear and the sixth gear can be in transmission connection with the first transmission shaft through the second synchronizer; a fifth gear, a seventh gear, a ninth gear, a tenth gear, a third synchronizer and a twelfth gear are installed on the second transmission shaft, the fifth gear, the seventh gear and the ninth gear are all fixedly connected with the second transmission shaft, the tenth gear and the second gear can be in transmission connection with the second transmission shaft through the third synchronizer, the second transmission shaft is connected with the reverse gear; the fourth gear and the fifth gear are in meshing transmission, the sixth gear and the seventh gear are in meshing transmission, the eighth gear and the ninth gear are in meshing transmission, the tenth gear and the eleventh gear are in meshing transmission, and the twelfth gear and the main transmission output gear are in meshing transmission.

[0007] As preferred, the auxiliary transmission system comprises an auxiliary transmission box, and a third transmission shaft and a fourth transmission shaft are installed on the auxiliary transmission box; one end of the first transmission shaft is input into the auxiliary transmission box, and a thirteenth gear is further fixed on the first transmission shaft, and the thirteenth gear is located in the auxiliary transmission box; a fourth synchronizer, a fifteenth gear, an eighteenth gear, a fifth synchronizer, a nineteenth gear and an auxiliary transmission output gear are installed on the third transmission shaft, the fifteenth gear, the eighteenth gear and the nineteenth gear are all loose-jointed on the third transmission shaft, the auxiliary transmission output gear is fixed on the third transmission shaft, the thirteenth gear and the fifteenth gear can be connected with the third transmission shaft through the fourth synchronizer, and the eighteenth gear and the nineteenth gear can be connected with the third transmission shaft through the fifth synchronizer; a fourteenth gear, a sixteenth gear, a seventeenth gear and a twentieth gear are fixed on the fourth transmission shaft; the thirteenth gear and the fourteenth gear are in meshing transmission, the fifteenth gear and the sixteenth gear are in meshing transmission, the seventeenth gear and the eighteenth gear are in meshing transmission, and the twentieth gear and the nineteenth gear are in meshing transmission.

[0008] As preferred, the gear shifting system comprises a high-low gear box, and a fifth transmission shaft and a sixth transmission shaft are installed in the high-low gear box; a twenty-second gear and a high-low gear output gear are installed on the fifth transmission shaft, the twenty-second gear is loose-jointed on the fifth transmission shaft, the high-low gear output gear is fixed on the fifth transmission shaft, the auxiliary transmission output gear and the twenty-second gear are in transmission connection with the fifth transmission shaft through a sixth synchronizer; a twenty-first gear and a twenty-third gear are fixed on the sixth transmission shaft; the twenty-first gear is in meshing transmission with the auxiliary transmission box output gear, and the twenty-third gear is in meshing transmission with the twenty-second gear.

[0009] As preferred, the gearbox further comprises a rear axle output system, the power output by the gear shifting system can be transmitted to the wheel hub through the rear axle output system.

[0010] As preferred, the gearbox further comprises a front axle output system, the power output by the gear shifting system can be output through the front axle output system.

[0011] As preferred, the gearbox further comprises a PTO output system, the power input by the power switching system can directly drive the PTO output system to output PTO.

[0012] As preferred, the gearbox further comprises a hydraulic pump driving system for providing power to the hydraulic pump, the power input by the power switching system can directly drive the hydraulic pump driving system to deliver power to the hydraulic pump.

[0013] The beneficial effects of the technical scheme of the utility model are as follows: the gearbox structure can form 6*4*2=48 gear positions through the gear arrangement and combination of the power switching system A, the main gear shifting system B, the auxiliary gear shifting system C and the gear shifting system D, the gearbox adopts different output modes when coping with different working conditions; and the above scheme adopts the combination of the synchronizer and the clutch, so that the operation is more simple. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Transmission principle of multi-gear tractor gearbox Figure 1 ;

[0015] Figure 2 Transmission principle of multi-gear tractor gearbox Figure 1 .

[0016] Reference numerals: 1, first gear; 2, second gear; 3, third gear; 4, reverse gear; 5, forward gear; 6, bidirectional clutch; 7, first synchronizer; 8, fourth gear; 9, fifth gear; 10, sixth gear; 11, seventh gear; 12, second synchronizer; 13, eighth gear; 14, ninth gear; 15, tenth gear; 16, eleventh gear; 17, third synchronizer; 18, twelfth gear; 19, main transmission output gear; 20, thirteenth gear; 21, fourteenth gear; 22, fourth synchronizer; 23, fifteenth gear; 24, sixteenth gear; 25, seventeenth gear; 26, eighteenth gear; 27, fifth synchronizer; 28, nineteenth gear; 29, twentieth gear; 30, twenty-first gear; 31, auxiliary transmission output gear; 32, twenty-second gear; 33, twenty-third gear; 34, twenty-fourth gear; 35, twenty-fifth gear; 36, twenty-sixth gear; 37, twenty-seventh gear; 38, twenty-seventh gear; 39, twenty-ninth gear; 40, high-low output gear; 41, differential mechanism; 42, differential lock; 43, brake; 44, thirtieth gear; 45, thirty-first gear; 46, thirty-second gear; 47, rear axle output shaft; 48, wheel hub; 49, PTO clutch; 50, thirty-third gear; 51, thirty-fourth gear; 52, seventh synchronizer; 53, thirty-fifth gear; 54, thirty-sixth gear; 56, input shaft; 57, sixth synchronizer; 58, hydraulic pump drive shaft; 59, front axle clutch;

[0017] A, power shift system; B, main transmission system; C, auxiliary transmission system; D, gear shifting system; E, front axle output system; F, hydraulic pump drive system; G, rear axle output system; H, PTO output system. DETAILED DESCRIPTION

[0018] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0019] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0020] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0021] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature. Embodiment

[0023] As Figure 1 and Figure 2The multi-gear tractor gearbox comprises the following components: a power reversing system A for providing power output switching between forward and reverse directions; a main gear shifting system B, which is in power connection with the power reversing system A and provides power output of six gears; a sub gear shifting system C, which is in power connection with the main gear shifting system B and provides power output of four gears; and a gear shifting system D, which is in power connection with the sub gear shifting system C and provides power switching between high gears and low gears for the power provided by the sub gear shifting system C.

[0024] The power input into the gearbox is sequentially transmitted to the rear axle of the vehicle through the power reversing system A, the main gear shifting system B, the sub gear shifting system C and the gear shifting system D.

[0025] In this way, the gearbox structure can form 6x4x2=48 gear outputs through the gear arrangement combination of the power reversing system A, the main gear shifting system B, the sub gear shifting system C and the gear shifting system D, and the above-mentioned scheme adopts the combination of synchronizers and clutches to make the operation simpler.

[0026] In this embodiment, the power reversing system A comprises a front box, and an input shaft 56, a first gear 1, a second gear 2, a third gear 3, a reverse gear 4 and a bidirectional clutch 6 installed in the front box. The power of the input shaft 56 can be transmitted to the first gear 1 or the reverse gear 4 through the bidirectional clutch 6, the first gear 1 is in meshing transmission with the second gear 2, the second gear 2 is in meshing transmission with the third gear 3, the third gear 3 is fixedly connected with a forward gear 5, and the reverse gear 4 is in meshing transmission with the forward gear 5.

[0027] The power of the power reversing system A is sequentially transmitted to the output through the input shaft 56, the bidirectional clutch 6, the reverse gear 4 and the forward gear 5 when the right side of the bidirectional clutch 6 is engaged.

[0028] The power of the power reversing system A is sequentially transmitted to the output through the input shaft 56, the bidirectional clutch 6, the first gear 1, the second gear 2, the third gear 3 and the reverse gear 4 when the left side of the bidirectional clutch 6 is engaged.

[0029] In this embodiment, as shown in FIG. 1, the main gear shifting system B comprises a main gear shifting box 7, a first gear 8, a second gear 9, a third gear 10, a fourth gear 11, a fifth gear 12, a sixth gear 13, a first clutch 14 and a second clutch 15. Figure 2As shown, the main transmission system B includes a main gearbox, and a rotating installation on the first transmission shaft and the second transmission shaft; the first transmission shaft is provided with a first synchronizer 7, a fourth gear 8, a sixth gear 10, a second synchronizer 12, an eighth gear 13, an eleventh gear 16 and a main transmission output gear 19, the fourth gear 8, the sixth gear 10, the sixth gear 10 and the eighth gear 13 are all sleeved on the first transmission shaft, the eleventh gear 16 and the main transmission output gear 19 are both fixed on the first transmission shaft, the forward gear 5 and the fourth gear 8 can be in transmission connection with the first transmission shaft through the first synchronizer 7, the sixth gear 10 and the sixth gear 10 can be in transmission connection with the first transmission shaft through the second synchronizer 12; the second transmission shaft is provided with a fifth gear 9, a seventh gear 11, a ninth gear 14, a tenth gear 15, a third synchronizer 17 and a twelfth gear 18, the fifth gear 9, the seventh gear 11 and the ninth gear 14 are all fixedly connected with the second transmission shaft, the tenth gear 15 and the second gear 2 can be in transmission connection with the second transmission shaft through the third synchronizer 17, and the second transmission shaft is connected with the reverse gear 4; the fourth gear 8 and the fifth gear 9 are in meshing transmission, the sixth gear 10 and the seventh gear 11 are in meshing transmission, the eighth gear 13 and the ninth gear 14 are in meshing, the tenth gear 15 and the eleventh gear 16 are in meshing, and the twelfth gear 18 and the main transmission output gear 19 are in meshing.

[0030] When the first synchronizer 7 is combined on the left side, the power passes through the forward gear 5, the first transmission shaft and the main transmission output gear 19 in sequence and is then output.

[0031] When the first synchronizer 7 is combined on the right side, the power passes through the reverse gear 4, the second transmission shaft, the fifth gear 9, the fourth gear 8, the first synchronizer 7, the first transmission shaft and the main transmission output gear 19 in sequence and is then output.

[0032] When the second synchronizer 12 is combined on the left side, the power passes through the reverse gear 4, the second transmission shaft, the seventh gear 11, the sixth gear 10, the second synchronizer 12, the first transmission shaft and the main transmission output gear 19 in sequence and is then output.

[0033] When the second synchronizer 12 is combined on the right side, the power passes through the reverse gear 4, the second transmission shaft, the ninth gear 14, the eighth gear 13, the second synchronizer 12, the first transmission shaft and the main transmission output gear 19 in sequence and is then output.

[0034] When the third synchronizer 17 is combined on the left side, the power passes through the reverse gear 4, the second transmission shaft, the second synchronizer 12, the tenth gear 15, the eleventh gear 16, the first transmission shaft and the main transmission output gear 19 in sequence and is then output.

[0035] When the third synchronizer 17 is combined on the right side, the power passes through the reverse gear 4, the second transmission shaft, the second synchronizer 12, the twelfth gear 18 and the main transmission output gear 19 in sequence and is then output.

[0036] In the embodiment, the auxiliary transmission system C comprises an auxiliary gearbox, and a third transmission shaft and a fourth transmission shaft are installed on the auxiliary gearbox; one end of the first transmission shaft is input into the auxiliary gearbox, and a thirteenth gear 20 is further fixed on the first transmission shaft, and the thirteenth gear 20 is located in the auxiliary gearbox; the third transmission shaft is installed with a fourth synchronizer 22, a fifteenth gear 23, an eighteenth gear 26, a fifth synchronizer 27, a nineteenth gear 28 and an auxiliary output gear 31, the fifteenth gear 23, the eighteenth gear 26 and the nineteenth gear 28 are all loose-jointed on the third transmission shaft, the auxiliary output gear 31 is fixed on the third transmission shaft, the thirteenth gear 20 and the fifteenth gear 23 can be connected with the third transmission shaft through the fourth synchronizer 22, and the eighteenth gear 26 and the nineteenth gear 28 can be connected with the third transmission shaft through the fifth synchronizer 27; the fourth transmission shaft is fixed with a fourteenth gear 21, a sixteenth gear 24, a seventeenth gear 25 and a twentieth gear 29; the thirteenth gear 20 and the fourteenth gear 21 are engaged, the fifteenth gear 23 and the sixteenth gear 24 are engaged, the seventeenth gear 25 and the eighteenth gear 26 are engaged, and the twentieth gear 29 and the nineteenth gear 28 are engaged.

[0037] When the fourth synchronizer 22 is combined on the left side, the power is sequentially output after passing through the main gearbox output gear, the thirteenth gear 20, the fourth synchronizer 22, the third transmission shaft and the auxiliary output gear 31.

[0038] When the fourth synchronizer 22 is combined on the right side, the power is sequentially output after passing through the main gearbox output gear, the thirteenth gear 20, the fourteenth gear 21, the fourth transmission shaft, the sixteenth gear 24, the fifteenth gear 23, the fourth synchronizer 22, the third transmission shaft and the auxiliary output gear 31.

[0039] When the fifth synchronizer 27 is combined on the left side, the power is sequentially output after passing through the main gearbox output gear, the thirteenth gear 20, the fourteenth gear 21, the fourth transmission shaft, the seventeenth gear 25, the eighteenth gear 26, the fifth synchronizer 27, the third transmission shaft and the auxiliary output gear 31.

[0040] When the fifth synchronizer 27 is combined on the right side, the power is sequentially output after passing through the main gearbox output gear, the thirteenth gear 20, the fourteenth gear 21, the fourth transmission shaft, the twentieth gear 29, the nineteenth gear 28, the fifth synchronizer 27, the third transmission shaft and the auxiliary output gear 31.

[0041] In the embodiment, the gear shifting system D includes a high-low gear box, and a fifth transmission shaft and a sixth transmission shaft installed in the high-low gear box; the fifth transmission shaft is provided with a twenty-second gear 32 and a high-low gear output gear 40, the twenty-second gear 32 is sleeved on the fifth transmission shaft, and the high-low gear output gear 40 is fixed on the fifth transmission shaft, the auxiliary transmission output gear 31 and the twenty-second gear 32 are in transmission connection with the fifth transmission shaft through the sixth synchronizer 57; the sixth transmission shaft is fixed with a twenty-first gear 30 and a twenty-third gear 33; the twenty-first gear 30 is in mesh with the auxiliary transmission box output gear, and the twenty-third gear 33 is in mesh with the twenty-second gear 32.

[0042] When the sixth synchronizer 57 is combined on the left side, the power is output after sequentially passing through the auxiliary transmission box output gear, the sixth synchronizer 57, the fifth transmission shaft and the high-low gear output gear 40.

[0043] When the sixth synchronizer 57 is combined on the right side, the power is output after sequentially passing through the auxiliary transmission box output gear, the thirteenth gear 20, the twenty-first gear 30, the sixth transmission shaft, the twenty-second gear 32, the sixth synchronizer 57, the fifth transmission shaft and the high-low gear output gear 40.

[0044] In the embodiment, the transmission box further includes a rear axle output system G, and the power output by the gear shifting system D is transmitted to the wheel hub through the rear axle output system G; the rear axle output system G includes a rear axle box, a differential mechanism 41 and wheel hubs 48; one end of the fifth transmission shaft extends into the rear axle box, the high-low gear output gear 40 is in transmission connection with the differential mechanism 41 installed in the rear axle box, and the differential mechanism 41 is in transmission connection with the wheel hubs 48 arranged on both sides of the rear axle box. The differential mechanism 41 is provided with a differential lock 42. The differential mechanism 41 can refer to the prior technical documents with publication numbers of CN220910376U, CN109185420A and CN109210175A.

[0045] In the embodiment, the two output half shafts of the differential mechanism 41 are connected with two planetary mechanisms respectively, and the planetary mechanisms are connected with the wheel hub 48. The planetary mechanism comprises a thirtieth gear 44, a thirty-first gear 45, a thirty-second gear 46 and a rear axle output shaft 47 which are installed on the rear axle housing, the thirtieth gear 44 is connected with the half shaft of the differential mechanism 41, the thirty-first gear 45 is engaged with the thirtieth gear 44, the thirty-first gear 45 is drivingly connected with the thirty-second gear 46, the thirty-second gear 46 is drivingly connected with the rear axle output shaft 47, and the rear axle output shaft 47 is connected with the wheel hub 48. The power passing through the differential mechanism is sequentially output from the wheel hub 48 through the thirtieth gear 44, the thirty-first gear 45, the thirty-second gear 46 and the rear axle output shaft 47. Further, the half shaft of the differential mechanism 41 and the rear axle housing are provided with a brake, and the brake 43 can brake the half shaft of the differential mechanism 41. The specific structure of the brake can refer to the prior art documents with publication numbers CN206398059U, CN202011323U and CN201456935U. In this way, the vehicle can be braked by the brake on the rear axle housing, and the rear axle output shafts on both sides can be locked under certain conditions by the differential lock.

[0046] In the embodiment, the transmission further comprises a front axle output system E, and the power output by the gear shifting system D can be output through the front axle output system E. The front axle output system E comprises a front housing and a twenty-seventh gear 37, a twenty-eighth gear 38, a twenty-ninth gear 39, a front axle clutch 59 and a front axle output shaft which are installed on the front housing. The twenty-seventh gear 37 is fixed on the fifth transmission shaft, the twenty-seventh gear 37 is engaged with the twenty-eighth gear 38, the twenty-eighth gear 38 is engaged with the twenty-ninth gear 39, and the twenty-ninth gear 39 is connected with the front axle output shaft through the front axle clutch 59.

[0047] The power of the front clutch combines the power of the fifth transmission shaft and is sequentially output from the front axle output shaft through the twenty-seventh gear 37, the twenty-eighth gear 38, the twenty-ninth gear 39 and the front axle clutch 59. In this way, the front axle clutch 59 can control the transmission to switch between four-wheel drive output and two-wheel drive output.

[0048] In the embodiment, the gearbox further comprises a PTO output system H, the PTO output system H comprises a PTO box, and a PTO clutch 49, a thirty-third gear 50, a thirty-fourth gear 51, a seventh synchronizer 52, a thirty-fifth gear 53, a thirty-sixth gear 54, a seventh transmission shaft and a PTO output shaft 55 in the PTO box; the input shaft 56 and the seventh transmission shaft are connected through the PTO clutch 49, the thirty-third gear 50 and the thirty-fourth gear 51 are fixed on the seventh transmission shaft, the thirty-fifth gear 53 and the thirty-sixth gear 54 are sleeved on the PTO output shaft 55, and the thirty-fifth gear 53 and the thirty-sixth gear 54 can be in transmission connection with the PTO output shaft 55 through the seventh synchronizer 52. In this way, the power disconnection and combination of the PTO output shaft 55 can be realized through the clutch on the PTO box, and the power two-gear output of the PTO output shaft 55 can be realized through the synchronizer.

[0049] In the embodiment, the gearbox further comprises a hydraulic pump driving system F for providing power to the hydraulic pump, the hydraulic pump driving system F comprises a hydraulic pump driving box, and a twenty-fourth gear 34, a twenty-fifth gear 35, a twenty-sixth gear 36 and a hydraulic pump driving shaft 58 arranged in the hydraulic pump driving box, the twenty-fourth gear 34 is installed on the input shaft 56, the twenty-fourth gear 34 and the twenty-fifth gear 35 are in meshing, the twenty-fifth gear 35 and the twenty-sixth gear 36 are in meshing, the twenty-sixth gear 36 is installed on the hydraulic pump driving shaft 58, and the hydraulic pump driving shaft 58 is connected with the hydraulic pump. In this way, it can be ensured that the hydraulic pump can always maintain power input during the operation of the gearbox, thereby ensuring the stable operation of the gearbox.

[0050] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments in the range of the utility model without departing from the principles and purposes of the utility model.

Claims

1. A multi-gear tractor gearbox characterised in that: The application relates to a power transmission system of a vehicle, which comprises the following components: a power reversing system (A) for providing power output switching between forward and reverse directions; a main transmission system (B) which is in power connection with the power reversing system (A) and provides power output of six gears; a sub-transmission system (C) which is in power connection with the main transmission system (B) and provides power output of four gears; and a gear shifting system (D) which is in power connection with the sub-transmission system (C) and provides power switching between high gears and low gears for the power provided by the sub-transmission system (C). The power input into the transmission is transmitted to the rear axle of the vehicle through the power reversing system (A), the main transmission system (B), the sub-transmission system (C) and the gear shifting system (D) in sequence.

2. A multi-gear tractor gearbox according to claim 1, characterized in that: The power reversing system (A) comprises a front box, an input shaft (56), a first gear (1), a second gear (2), a third gear (3), a reverse gear (4) and a bidirectional clutch (6) which are installed in the front box, the power of the input shaft (56) can be transmitted to the first gear (1) or the reverse gear (4) through the bidirectional clutch (6), the first gear (1) is in transmission connection with the second gear (2), the second gear (2) is in transmission connection with the third gear (3), the third gear (3) is fixedly connected with a forward gear (5), and the reverse gear (4) is in transmission connection with the forward gear (5).

3. A multi-gear tractor gearbox according to claim 2, characterised in that: The main transmission system (B) comprises a main transmission box and a first transmission shaft and a second transmission shaft which are rotatably installed, the first transmission shaft is provided with a first synchronizer (7), a fourth gear (8), a sixth gear (10), a second synchronizer (12), an eighth gear (13), an eleventh gear (16) and a main transmission output gear (19), the fourth gear (8), the sixth gear (10), the sixth gear (10) and the eighth gear (13) are all sleeved on the first transmission shaft, the eleventh gear (16) and the main transmission output gear (19) are fixed on the first transmission shaft, the forward gear (5) and the fourth gear (8) can be in transmission connection with the first transmission shaft through the first synchronizer (7), the sixth gear (10) and the sixth gear (10) can be in transmission connection with the first transmission shaft through the second synchronizer (12), the second transmission shaft is provided with a fifth gear (9), a seventh gear (11), a ninth gear (14), a tenth gear (15), a third synchronizer (17) and a twelfth gear (18), the fifth gear (9), the seventh gear (11) and the ninth gear (14) are all fixedly connected with the second transmission shaft, the tenth gear (15) and the second gear (2) can be in transmission connection with the second transmission shaft through the third synchronizer (17), the second transmission shaft is connected with the reverse gear (4), the fourth gear (8) and the fifth gear (9) are in transmission connection, the sixth gear (10) and the seventh gear (11) are in transmission connection, the eighth gear (13) and the ninth gear (14) are in transmission connection, the tenth gear (15) and the eleventh gear (16) are in transmission connection, and the twelfth gear (18) and the main transmission output gear (19) are in transmission connection.

4. A multi-gear tractor gearbox according to claim 2, characterised in that: The auxiliary transmission system (C) comprises an auxiliary gearbox, and a third transmission shaft and a fourth transmission shaft are installed on the auxiliary gearbox; one end of the first transmission shaft is input into the auxiliary gearbox, and a thirteenth gear (20) is further fixed on the first transmission shaft, and the thirteenth gear (20) is located in the auxiliary gearbox; the third transmission shaft is provided with a fourth synchronizer (22), a fifteenth gear (23), an eighteenth gear (26), a fifth synchronizer (27), a nineteenth gear (28) and an auxiliary transmission output gear (31), the fifteenth gear (23), the eighteenth gear (26) and the nineteenth gear (28) are all sleeved on the third transmission shaft, the auxiliary transmission output gear (31) is fixed on the third transmission shaft, the thirteenth gear (20) and the fifteenth gear (23) can be connected with the third transmission shaft through the fourth synchronizer (22), the eighteenth gear (26) and the nineteenth gear (28) can be connected with the third transmission shaft through the fifth synchronizer (27); the fourth transmission shaft is fixed with a fourteenth gear (21), a sixteenth gear (24), a seventeenth gear (25) and a twentieth gear (29); the thirteenth gear (20) and the fourteenth gear (21) are in meshing, the fifteenth gear (23) and the sixteenth gear (24) are in meshing, the seventeenth gear (25) and the eighteenth gear (26) are in meshing, and the twentieth gear (29) and the nineteenth gear (28) are in meshing.

5. A multi-gear tractor gearbox according to claim 3, characterised in that: The gear shifting system (D) comprises a high-low gear box, and a fifth transmission shaft and a sixth transmission shaft are installed in the high-low gear box; the fifth transmission shaft is provided with a twenty-second gear (32) and a high-low gear output gear (40), the twenty-second gear (32) is sleeved on the fifth transmission shaft, the high-low gear output gear (40) is fixed on the fifth transmission shaft, the auxiliary transmission output gear (31) and the twenty-second gear (32) are in driving connection with the fifth transmission shaft through a sixth synchronizer (57); the sixth transmission shaft is fixed with a twenty-first gear (30) and a twenty-third gear (33); the twenty-first gear (30) is in meshing with the auxiliary gearbox output gear, and the twenty-third gear (33) is in meshing with the twenty-second gear (32).

6. A multi-gear tractor gearbox according to claim 1, characterized in that: The gearbox further comprises a rear axle output system (G), and the power output by the gear shifting system (D) is transmitted to the hub through the rear axle output system (G).

7. A multi-gear tractor gearbox according to claim 1, characterized in that: The gearbox further comprises a front axle output system (E), and the power output by the gear shifting system (D) can be output through the front axle output system (E).

8. A multi-gear tractor gearbox according to claim 1, characterized in that: The gearbox further comprises a PTO output system (H), and the power input by the power switching system (A) directly drives the PTO output system (H) to perform PTO output.

9. A multi-gear tractor gearbox according to claim 1, characterized in that: The gearbox further comprises a hydraulic pump driving system (F) for providing power to a hydraulic pump, and the power input by the power switching system (A) directly drives the hydraulic pump driving system (F) to deliver power to the hydraulic pump.

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