CN112664624A - Gearbox of 40F +40R power gear-shifting tractor - Google Patents
Gearbox of 40F +40R power gear-shifting tractor Download PDFInfo
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- CN112664624A CN112664624A CN202011418280.XA CN202011418280A CN112664624A CN 112664624 A CN112664624 A CN 112664624A CN 202011418280 A CN202011418280 A CN 202011418280A CN 112664624 A CN112664624 A CN 112664624A
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Abstract
A40F +40R power shifting tractor gearbox comprises a power shifting transmission device, a crawling gear transmission device, a power reversing transmission device and a section shifting transmission device; a first shaft and a second shaft are arranged in the power gear shifting transmission device, one end of the first shaft is connected with a tractor engine, the other end of the first shaft is connected with a tractor PTO, and clutches and matched gears for realizing different gears are arranged on the first shaft and the second shaft; the power reversing transmission device is internally provided with a three shaft and a six shaft, and the three shaft is provided with a forward clutch and a reverse clutch; a two-stage external meshing mechanism is arranged in the crawling gear transmission device, the input end of the crawling gear transmission device is connected with the three shafts, the output end of the crawling gear transmission device is connected with the input end of the section gear shifting transmission device, and the output end of the section gear shifting transmission device is connected with the rear axle; the first shaft and the fourth shaft are distributed in a longitudinal central plane of the tractor, the second shaft and the third shaft are respectively positioned on two sides of the longitudinal central plane of the tractor, and the fifth shaft and the third shaft are arranged on the same straight line. The invention has the characteristics of simple structure, complete functions and high transmission efficiency.
Description
Technical Field
The invention belongs to the field of tractors, and particularly relates to a gearbox of a 40F +40R power gear shifting tractor.
Background
At present, mechanical gear shifting modes such as an engaging sleeve and a synchronizer are mostly adopted in a gearbox of a domestic high-power wheeled tractor, a main clutch needs to be separated firstly when the tractor shifts gears, the power of an engine is cut off, then the required gears are shifted, the gear shifting is slow, and the operation efficiency is influenced.
The power gear shifting technology is characterized in that a hydraulic control system and a wet clutch are used for controlling a gearbox to shift gears, so that gear shifting and reversing operations of the gearbox under the condition of uninterrupted power are realized. Compared with the traditional mechanical gear shifting, the power gear shifting technology can realize uninterrupted power in the gear shifting process, simplify the operation process, greatly reduce the operation difficulty and labor intensity, improve the operation quality and further realize the improvement of the operation efficiency.
The tractor power technology of shifting mainly aims at full power structure of shifting, and this structure requires highly to the machining precision, and the manufacturing degree of difficulty is great, hardly satisfies domestic manufacturing enterprise's demand at present stage, consequently is necessary to develop an adaptation china market, and the structure is simple relatively, reliable durable big horsepower power tractor gearbox of shifting.
Disclosure of Invention
The invention aims to provide a 40F +40R power gear shifting tractor gearbox which is simple in structure, complete in function, high in transmission efficiency and low in manufacturing cost and can realize the functions of power gear shifting, power reversing and crawling gear.
In order to achieve the purpose, the invention adopts the technical scheme that: A40F +40R power shifting tractor gearbox comprises a power shifting transmission device, a crawling gear transmission device, a power reversing transmission device and a section shifting transmission device; the power gear shifting transmission device is internally provided with a first shaft and a second shaft which are parallel, one end of the first shaft is connected with a tractor engine, the other end of the first shaft is connected with a tractor PTO, a V-gear driving gear, a II-gear clutch, a II-gear driving gear, a I-gear clutch, a IV-gear driving gear and a III-gear driving gear are sequentially arranged on the first shaft from front to back, a V-gear driven gear, a V-gear clutch, a II-gear driven gear, a I-gear driven gear, a IV-gear clutch, a IV-gear driven gear, a III-gear driven gear and a III-gear clutch are sequentially arranged on the second shaft from front to back, and gears on; the power reversing transmission device is internally provided with a three shaft and a six shaft which are parallel, wherein the three shaft is sequentially provided with a forward gear, a forward clutch, a reverse clutch and a reverse gear driven gear from front to back, the forward gear is constantly meshed with the first gear driven gear, the six shaft is provided with a reverse gear primary idler wheel and a reverse gear secondary idler wheel from front to back, the reverse gear primary idler wheel is constantly meshed with the second gear driven gear, and the reverse gear secondary idler wheel is constantly meshed with the reverse gear driven gear; the crawling gear transmission device is internally provided with a two-stage external meshing mechanism which comprises a crawling gear one-stage driving gear, a crawling gear duplex gear, a crawling gear idler shaft, a crawling gear two-stage driven gear, a crawling gear output shaft and a crawling gear shifting mechanism, wherein the crawling gear idler shaft and the crawling gear output shaft are arranged in parallel, the crawling gear duplex gear is installed on the crawling gear idler shaft, the crawling gear one-stage driving gear is fixedly installed at the output end of the six shafts, the crawling gear shifting mechanism and the crawling gear two-stage driven gear are installed on the crawling gear output shaft, and the crawling gear one-stage driving gear and the crawling gear two-stage driven gear are respectively meshed with two gears in the crawling gear duplex gear; the section gear shifting transmission device is internally provided with a four shaft and a five shaft, the output end of the four shaft is connected with a rear axle, the input end of the five shaft is connected with the output end of a crawling gear output shaft, a V gear driven gear, an M gear driven gear, an L gear driven gear, an LL-L gear synchronizer and an LL gear driven gear are arranged on the four shaft from front to back, a V gear driving gear, an M-V gear synchronizer, an M gear driving gear, an L gear driving gear and an LL gear driving gear are arranged on the five shaft from front to back, and corresponding gears on the four shaft and the five shaft are meshed; the first shaft and the fourth shaft are distributed in a longitudinal central plane of the tractor, the second shaft and the third shaft are respectively positioned on two sides of the longitudinal central plane of the tractor, and the fifth shaft and the third shaft are arranged on the same straight line.
In the power gear-shifting transmission device, a V-gear driving gear, an IV-gear driving gear and a III-gear driving gear are fixedly connected on a shaft, and a II-gear driving gear and a I-gear driving gear are sleeved on the shaft; the second-gear driven gear and the first-gear driven gear are fixedly connected to the second shaft, and the V-gear driven gear, the IV-gear driven gear and the III-gear driven gear are sleeved on the second shaft.
A shell of the clutch with the second gear and a shell of the clutch with the first gear are fixedly connected on a shaft, a shell of the clutch with the V gear and a shell of the clutch with the fourth gear are fixedly connected on a shaft, a driven gear with the second gear is adjacent to the shell of the clutch with the V gear, and the driven gear with the first gear is adjacent to the shell of the clutch with the fourth gear.
In the power reversing transmission device, a forward gear and a reverse gear driven gear are sleeved on three shafts, a shell of a forward clutch is welded on the forward gear, and a shell of a reverse clutch is welded on the reverse gear driven gear; the reverse gear first-stage idler wheel and the reverse gear second-stage idler wheel are fixedly connected to the six shaft.
The crawling gear output shaft is fixedly connected with the input end of the five shaft through a connecting sleeve.
The climbing gear duplex gear is fixedly connected to a climbing gear idler shaft, the climbing gear duplex gear comprises a climbing gear one-level driven gear and a climbing gear two-level driving gear, the climbing gear two-level driven gear is sleeved on a climbing gear output shaft, and the climbing gear shifting mechanism is connected to the climbing gear output shaft through splines.
In the section gear shifting transmission device, an LL gear driving gear, an L gear driving gear and an M-V gear synchronizer are fixedly connected on a five shaft, the M gear driving gear and the V gear driving gear are sleeved on the five shaft, an LL gear driven gear and an L gear driven gear are sleeved on the four shaft, and the LL-L gear synchronizer, the M gear driven gear and the V gear driven gear are fixedly connected on the four shaft.
The six shafts and the seven shafts are arranged at the same side of the three shafts.
The first-gear clutch, the second-gear clutch, the third-gear clutch, the fourth-gear clutch, the V-gear clutch, the forward clutch and the reverse clutch are all normally-separated electro-hydraulic control wet-type multi-plate clutches.
The invention has the beneficial effects that: in the gearbox, the shafting main body adopts a three-shaft layout, and the first shaft, the second shaft and the three shafts are arranged in a space triangle, so that the space layout structure is compact, the gearbox is simple and convenient, the space is effectively saved, the volume of the gearbox is reduced, and meanwhile, the arrangement of peripheral pipeline parts of the gearbox is facilitated.
In the power gear shifting transmission device, five clutches can form five power gears, each clutch controls one gear, the structure is simple, the control is convenient, each power gear only has one pair of gear pairs to participate in the work, the transmission efficiency is high, and the logic control is simple.
In the power reversing transmission device, a forward clutch and a reverse clutch are arranged, so that on one hand, the combination and separation time can be controlled according to a control command to realize power reversing; on the other hand, when the gear shifting operation is carried out in the section, both the forward clutch and the reverse clutch can be used as main clutches, namely when the gear shifting operation is carried out between the sections, the forward clutch or the reverse clutch is firstly disconnected, the power of an engine is cut off at the position, then the gear shifting operation of the synchronizer is carried out, so that the rotational inertia of the front power gear shifting transmission device cannot be completely added to the synchronizer, the load of the synchronizer is reduced in an intangible manner, and the service life of the synchronizer is prolonged.
In the power reversing transmission device, a first-gear driven gear and a forward-gear driven gear form a forward-gear normally-meshed gear pair, and a second-gear driven gear and a reverse-gear first-stage idle gear form a reverse-gear normally-meshed gear pair. I keep off driven gear and II keep off driven gear and act as driven gear in power transmission of shifting gears, in power reversing transmission, act as the switching-over driving gear, can save two gears on spatial structure like this, have effectively reduced spatial structure, can reduce the size of back box casing simultaneously.
In a range shift transmission, four range gears can be formed. The 40F +40R power gear-shifting tractor gearbox adopts the arrangement mode, has clear transmission line, simple structure and compact arrangement, can obtain more gear numbers, and can transmit power to a rear axle and a PTO (power take-off). Through power shift transmission device, crawl gear transmission device, power reversing transmission device and section shift transmission device, the whole gearbox can realize 40 forward gears and 40 reverse gears. The forward gear and the reverse gear have wide speed coverage, and the reverse gear can be used for shielding partial working gears according to the working requirement of the whole machine. The transmission device meets the requirements of various domestic and foreign tractors on speed under working conditions, and can change gears and driving directions under the condition of not cutting off the power transmission of the tractors due to the adoption of power shifting and power reversing technologies. The gear shifting mode adopts button operation, is easy and quick, greatly improves the operation efficiency of the tractor and reduces the labor intensity of a driver.
Drawings
FIG. 1 is a schematic diagram of a gearbox structure of a 40F +40R power shifting tractor.
FIG. 2 is a shafting space layout diagram of the gearbox of the 40F +40R power shift tractor.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the invention is not limited thereto.
Referring to the attached drawings, the gearbox of the 40F +40R power shifting tractor mainly comprises a power shifting transmission device 1, a crawling gear transmission device 2, a power reversing transmission device 3 and a section shifting transmission device 4. Wherein the input end of the power gear shifting transmission device 1 is connected with a tractor engine, and the output end of the power gear shifting transmission device 1 is connected with a tractor PTO; the output end of the section gear shifting transmission device 4 is connected with a rear axle of the tractor. A first shaft S1 and a second shaft S2 are installed in the power shifting transmission device 1, a seventh shaft S7 and a crawling gear output shaft 23 are installed in the crawling gear transmission device 2, a third shaft S3 and a sixth shaft S6 are installed in the power reversing transmission device 3, and a fourth shaft S4 and a fifth shaft S5 are installed in the section shifting transmission device 4. The first shaft S1, the second shaft S2, the third shaft S3, the fourth shaft S4, the fifth shaft S5, the sixth shaft S6, the seventh shaft S7 and the crawling gear output shaft 23 are arranged in parallel space, wherein the first shaft S1 and the fourth shaft S4 are distributed in a longitudinal central plane of the tractor, the second shaft S2 and the third shaft S3 are respectively positioned on two sides of the longitudinal central plane of the tractor, the fifth shaft S5 and the third shaft S3 are arranged on the same straight line, when the tractor is seen from the rear part to the front, as shown in FIG. 2, the second shaft S2 and the third shaft S3 are respectively positioned on the left side and the right side of the longitudinal central plane of the tractor, and the sixth shaft S6 and the seventh shaft S7.
In the power shift transmission device 1, one end of a shaft S1 is connected with a tractor engine, the other end of the shaft S1 is connected with a tractor PTO, and a V-gear driving gear 5, a II-gear clutch 200, a II-gear driving gear 6, a I-gear driving gear 7, a I-gear clutch 100, a IV-gear driving gear 8 and a III-gear driving gear 9 are sequentially arranged on a shaft S1 from front to back; the V-gear driving gear 5, the IV-gear driving gear 8 and the III-gear driving gear 9 are fixedly connected to a shaft S1, and the II-gear driving gear 6 and the I-gear driving gear 7 are sleeved on a shaft S1; the housing of the second clutch 200 is fixed to a shaft S1, and the housing of the first clutch 100 is fixed to a shaft S1. V keeps off driving gear 5 and II fender clutch 200 'S casing and set up rigid coupling on an axle S1 after the body structure, IV keeps off driving gear 8 and I fender clutch 100' S casing and set up rigid coupling on an axle S1 after the body structure, II keep off driving gear 6 and I fender driving gear 7 adjacent, and I keep off driving gear 7 and I keep off clutch 100 'S spline hub and set up the body structure after the suit on an axle S1, and same II keep off driving gear 6 also can set up the body structure with II fender clutch 200' S spline hub and back the suit on an axle S1.
The second shaft S2 is provided with a v-speed driven gear 10, a v-speed clutch 500, a ii-speed driven gear 11, an i-speed driven gear 12, an iv-speed clutch 400, an iv-speed driven gear 13, a iii-speed driven gear 14, and a iii-speed clutch 300 in this order from front to rear. The second-gear driven gear 11 and the first-gear driven gear 12 are fixedly connected to a second shaft S2, and the V-gear driven gear 10, the IV-gear driven gear 13 and the III-gear driven gear 14 are sleeved on the second shaft S2. The housing of the v-gear clutch 500, the housing of the iv-gear clutch 400, and the iii-gear clutch 300 are each grounded to the countershaft S2. The II-gear driven gear 11 and the I-gear driven gear 12 are arranged between the V-gear clutch 500 and the IV-gear clutch 400, the shells of the II-gear driven gear 11 and the V-gear clutch 500 are adjacent, the shells of the I-gear driven gear 12 and the IV-gear clutch 400 are adjacent, and the II-gear driven gear 11 and the I-gear driven gear 12 can be further arranged into a duplicate gear.
Further, the housing of the second-gear driven gear 11 and the housing of the v-gear clutch 500 may be integrally configured and then fixed to the second shaft S2, the housing of the first-gear driven gear 12 and the housing of the iv-gear clutch 400 may be integrally configured and then fixed to the second shaft S2, the spline hubs of the v-gear driven gear 10 and the v-gear clutch 500 may be integrally configured and then sleeved on the second shaft S2, the spline hubs of the iv-gear driven gear 13 and the iv-gear clutch 400 may be integrally configured and then sleeved on the second shaft S2, and the spline hubs of the iii-gear driven gear 14 and the iii-gear clutch 300 may be integrally configured and then sleeved on the second shaft S2. The driving gear and the driven gear on the first shaft S1 and the second shaft S2 are correspondingly meshed.
In the power reversing transmission device 3, a forward gear 16, a forward clutch F, a reverse clutch R and a reverse gear driven gear 17 are sequentially arranged on a three shaft S3 from front to back, wherein the forward gear 16 and the reverse gear driven gear 17 are sleeved on the three shaft S3, a housing of the forward clutch F is welded on the forward gear 16, a housing of the reverse clutch R is welded on the reverse gear driven gear 17, and the forward gear 16 and the i-gear driven gear 12 are normally meshed; the reverse first-stage idler gear 15 and the reverse second-stage idler gear 18 are fixedly connected to the six shaft S6 from front to back, the reverse first-stage idler gear 15 is in constant mesh with the second-stage driven gear 11, and the reverse second-stage idler gear 18 is in constant mesh with the reverse driven gear 17.
The crawling gear transmission device 2 is provided with a two-stage external meshing mechanism which comprises a crawling gear one-stage driving gear 20, a crawling gear dual gear 19, a crawling gear idler shaft S7, a crawling gear two-stage driven gear 22, a crawling gear output shaft 23 and a crawling gear shifting mechanism 21, wherein the crawling gear idler shaft S7 and the crawling gear output shaft 23 are arranged in parallel, the crawling gear dual gear 19 is installed on the crawling gear idler shaft S7, and the crawling gear one-stage driving gear 20 is fixedly installed at the output end of the six shafts S6 and serves as the input end of a crawling gear; the crawling gear shifting mechanism 21 is connected to a crawling gear output shaft 23 through a spline, a crawling gear secondary driven gear 22 is sleeved on the crawling gear output shaft 23, and a crawling gear primary driving gear 20 and the crawling gear secondary driven gear 22 are respectively meshed with a crawling gear primary driven gear 19a and a crawling gear secondary driving gear 19b in the crawling gear dual gear 19; the tail end of the crawling gear output shaft 23 is provided with the connecting sleeve 24, and the connecting sleeve 24 serves as an output end of the crawling gear and can form two gears, wherein one gear is a direct gear, the other gear is a crawling gear, the structure is simple, the layout is compact, the connecting sleeve is located inside the box body, and the connecting sleeve can be selected and installed as an independent module. In a standard configuration, the creeper gear transmission may not be provided.
In the range shifting transmission device 4, an output end of a four shaft S4 is connected with a rear axle, an input end of a five shaft S5 is connected with a connecting sleeve 24 on a crawling gear output shaft 23, a V gear driven gear 30, an M gear driven gear 31, an L gear driven gear 32, an LL-L gear synchronizer 33 and an LL gear driven gear 34 are arranged on the four shaft S4 from front to back, a V gear driving gear 25, an M-V gear synchronizer 26, an M gear driving gear 27, an L gear driving gear 28 and an LL gear driving gear 29 are arranged on the five shaft S5 from front to back, and corresponding gears on the four shaft S4 and the five shaft S5 are meshed. The V-gear driven gear 30, the M-gear driven gear 31 and the LL-L gear synchronizer 33 are fixedly connected to a four shaft S4, and the LL-gear driven gear 34 and the L-gear driven gear 32 are sleeved on the four shaft S4. The LL gear driving gear 29, the L gear driving gear 28 and the M-V gear synchronizer 26 are fixedly connected to a five shaft S5, and the M gear driving gear 27 and the V gear driving gear 25 are sleeved on a five shaft S5.
In the above structure, the "sleeved" and "sleeved" refer to rotatable connection, so as to distinguish from "fixed connection".
In the invention, the first-gear clutch 100, the second-gear clutch 200, the third-gear clutch 300, the fourth-gear clutch 400, the v-gear clutch 500, the forward clutch F and the reverse clutch R are normally-separated electro-hydraulic control wet-type multi-plate clutches, and all the clutches can be combined according to instructions.
The first-gear clutch 100 can be fixedly connected with the first-gear driving gear 7 according to a control command, and at the moment, a shaft S1, the first-gear driving gear 7, the first-gear clutch 100, the IV-gear driving gear 8 and other parts do not rotate relatively.
The second-gear clutch 200 may be fixedly connected to the second-gear driving gear 6 according to a control command, and at this time, the shaft S1, the v-gear driving gear 5, the second-gear clutch 200, the second-gear driving gear 6, and the like do not rotate relatively.
The third-gear clutch 300 can be fixedly connected with the third-gear driven gear 14 according to a control command, and the parts such as the second shaft S2, the third-gear driven gear 14, the third-gear clutch 300 and the like do not rotate relatively.
The iv-speed clutch 400 can be fixedly connected with the iv-speed driven gear 13 according to a control command, and at this time, the parts such as the second shaft S2, the i-speed driven gear 12, the iv-speed clutch 400, the iv-speed driven gear 13 and the like do not rotate relatively.
The v-gear clutch 500 may be fixedly connected to the v-gear driven gear 10 according to a control command, and at this time, the parts such as the second shaft S2, the v-gear driven gear 10, the v-gear clutch 500, the second-gear driven gear 11, and the like do not rotate relatively.
In the power shift transmission device 1, the first-gear clutch 100, the second-gear clutch 200, the third-gear clutch 300, the fourth-gear clutch 400 and the v-gear clutch 500 can form five power gears which are respectively a first gear, a second gear, a third gear, a fourth gear and a v gear, and each clutch controls one gear independently. The power transmission route of each gear will be explained below.
I, blocking: the first-gear clutch 100 on the first shaft S1 is engaged, the second-gear clutch 200 on the first shaft S1, the third-gear clutch 300, the fourth-gear clutch 400, and the v-gear clutch 500 on the second shaft S2 are disengaged, and engine power is transmitted along the first shaft S1 → the first-gear drive gear 7 → the first-gear clutch 100 → the first-gear driven gear 12 → the second shaft S2.
II, gear shifting: the second clutch 200 on the first shaft S1 is engaged, the first clutch 100 is disengaged, the third clutch 300, the fourth clutch 400, and the v clutch 500 on the second shaft S2 are disengaged, and the engine power is transmitted along the first shaft S1 → the second drive gear 6 → the second clutch 200 → the second driven gear 11 → the second shaft S2.
And III, blocking: the third clutch 300 on the second shaft S2 is engaged, the first clutch 100 and the second clutch 200 on the first shaft S1 are disengaged, the iv clutch 400 and the v clutch 500 on the second shaft S2 are disengaged, and the engine power is transmitted along the first shaft S1 → the third drive gear 9 → the third clutch 300 → the third drive gear 14 → the second shaft S2.
And IV, gear shifting: the iv clutch 400 on the second shaft S2 is engaged, the first clutch 100 and the second clutch 200 on the first shaft S1 are disengaged, the third clutch 300 and the v clutch 500 on the second shaft S2 are disengaged, and the engine power is transmitted along the first shaft S1 → the iv drive gear 8 → the iv driven gear 13 → the iv clutch 400 → the second shaft S2.
V, gear shifting: the v-range clutch 500 on the second shaft S2 is engaged, the first-gear clutch 100 and the second-gear clutch 200 on the first shaft S1 are disengaged, the third-gear clutch 300 and the fourth-gear clutch 400 on the second shaft S2 are disengaged, and the engine power is transmitted along the first shaft S1 → the v-range drive gear 5 → the v-range driven gear 10 → the v-range clutch 500 → the second shaft S2.
Forward gear: the forward clutch F is engaged and the reverse clutch R is disengaged, and the power gears hitching power in gear i or gear ii or gear iii or gear iv or gear v, and power to the rear axle is transmitted through the driven gear 12 in gear i on the second shaft S2, along the driven gear 12 in gear i → the gear 16 in gear forward → the forward clutch F → the third shaft S3.
Reverse gear: the forward clutch F is disengaged and the reverse clutch R is engaged, the power gears engage power in gear i or gear ii or gear iii or gear iv or gear v, and power to the rear axle is transmitted through the gear ii driven gear 11 on the second shaft S2, along the gear ii driven gear 11 → the reverse first-stage idler 15 → the six shaft S6 → the reverse second-stage idler 18 → the reverse driven gear 17 → the reverse clutch R → the third shaft S3.
Crawling and blocking: the crawling gear shifting mechanism 21 slides towards the direction of the rear axle, and a crawling gear is hung. Power is transmitted through the three shafts S3 → the first-stage driving gear 20 of creep gear → the double gear 19 of creep gear → the second-stage driven gear 22 of creep gear → the output shaft 23 of creep gear.
Directly blocking: corresponding to the creep gear, the creep gear shift mechanism 21 slides in the direction of the engine, the creep gear one-stage driving gear 20 is rigidly connected to the creep gear shift mechanism 21, and power is transmitted through the three shafts S3 → the creep gear one-stage driving gear 20 → the creep gear shift mechanism 21 → the creep gear output shaft 23.
The crawler gear transmission device 2 can be used as an optional mechanism, when the gearbox is not selected to install the crawler gear, the power can be input into the range shifting device 4 through the connection sleeve 24 and the three shafts S3, but the gear which can be realized at the moment is 20F +20R, so that the selection is needed according to actual conditions.
Power is output through the crawling gear transmission device 2 and is input into the section gear shifting device 4 through the connecting sleeve 24, four section gears can be formed according to the positions of the LL-L gear synchronizer 33 and the M-V gear synchronizer 26, namely the LL gear, the L gear, the M gear and the V gear, and the rotating speed is sequentially increased.
LL keeps off: the LL-L stage synchronizer 33 slides rightward and engages with the coupling teeth on the LL stage driven gear 34, and power is transmitted from the five shaft S5 → the LL stage driving gear 29 → the LL stage driven gear 34 → the LL-L stage synchronizer 33 → the four shaft S4.
L gear: the LL-L synchronizer 34 slides leftward and engages with the coupling teeth on the L driven gear 32, and power is transmitted from the five shaft S5 → the L driving gear 28 → the L driven gear 32 → the LL-L synchronizer 33 → the four shaft S4.
M is gear: the synchronizer 26 for the M-V gear slides to the right and is engaged with the connecting teeth on the driving gear 27 for the M gear, and the power is transmitted by the five shafts S5 → the synchronizer 26 for the M-V gear → the driving gear 27 for the M gear → the driven gear 31 for the M gear → the four shafts S4.
V, gear shifting: the synchronizer 26 for the M-V gear slides leftwards and is meshed with connecting teeth on the driving gear 25 for the V gear, and power is transmitted by the five shafts S5 → the synchronizer 26 for the M-V gear → the driving gear 25 for the V gear → the driven gear 30 for the V gear → the four shafts S4.
After power is transmitted to the four-shaft S4, the power finally reaches the rear axle.
When the crawler belt transmission device 2 is located at a direct gear, 20 gears are provided for a forward gear, and 20 gears are theoretically provided for a reverse gear, and when the crawler belt transmission device 2 is located at a crawler belt gear, 20 gears are provided for a forward gear, and 20 gears are theoretically provided for a reverse gear, so that 40 forward gears and 40 reverse gears can be theoretically formed. However, the reverse gear speed cannot be too high in consideration of safety factors, so that an electric control program can be adopted to shield partial gears.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the specific embodiments of the present invention can be modified or substituted with equivalents with reference to the above embodiments, and any modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims to be appended.
Claims (9)
1. The utility model provides a 40F +40R power shift tractor gearbox which characterized in that: the power reversing transmission device comprises a power gear shifting transmission device, a crawling gear transmission device, a power reversing transmission device and a section gear shifting transmission device; the power gear shifting transmission device is internally provided with a first shaft and a second shaft which are parallel, one end of the first shaft is connected with a tractor engine, the other end of the first shaft is connected with a tractor PTO, a V-gear driving gear, a II-gear clutch, a II-gear driving gear, a I-gear clutch, a IV-gear driving gear and a III-gear driving gear are sequentially arranged on the first shaft from front to back, a V-gear driven gear, a V-gear clutch, a II-gear driven gear, a I-gear driven gear, a IV-gear clutch, a IV-gear driven gear, a III-gear driven gear and a III-gear clutch are sequentially arranged on the second shaft from front to back, and gears on; the power reversing transmission device is internally provided with a three shaft and a six shaft which are parallel, wherein the three shaft is sequentially provided with a forward gear, a forward clutch, a reverse clutch and a reverse gear driven gear from front to back, the forward gear is constantly meshed with the first gear driven gear, the six shaft is provided with a reverse gear primary idler wheel and a reverse gear secondary idler wheel from front to back, the reverse gear primary idler wheel is constantly meshed with the second gear driven gear, and the reverse gear secondary idler wheel is constantly meshed with the reverse gear driven gear; the crawling gear transmission device is internally provided with a two-stage external meshing mechanism which comprises a crawling gear one-stage driving gear, a crawling gear duplex gear, a crawling gear idler shaft, a crawling gear two-stage driven gear, a crawling gear output shaft and a crawling gear shifting mechanism, wherein the crawling gear idler shaft and the crawling gear output shaft are arranged in parallel, the crawling gear duplex gear is installed on the crawling gear idler shaft, the crawling gear one-stage driving gear is fixedly installed at the output end of the six shafts, the crawling gear shifting mechanism and the crawling gear two-stage driven gear are installed on the crawling gear output shaft, and the crawling gear one-stage driving gear and the crawling gear two-stage driven gear are respectively meshed with two gears in the crawling gear duplex gear; the section gear shifting transmission device is internally provided with a four shaft and a five shaft, the output end of the four shaft is connected with a rear axle, the input end of the five shaft is connected with the output end of a crawling gear output shaft, a V gear driven gear, an M gear driven gear, an L gear driven gear, an LL-L gear synchronizer and an LL gear driven gear are arranged on the four shaft from front to back, a V gear driving gear, an M-V gear synchronizer, an M gear driving gear, an L gear driving gear and an LL gear driving gear are arranged on the five shaft from front to back, and corresponding gears on the four shaft and the five shaft are meshed; the first shaft and the fourth shaft are distributed in a longitudinal central plane of the tractor, the second shaft and the third shaft are respectively positioned on two sides of the longitudinal central plane of the tractor, and the fifth shaft and the third shaft are arranged on the same straight line.
2. The 40F +40R powershift tractor transmission of claim 1, wherein: in the power gear-shifting transmission device, a V-gear driving gear, an IV-gear driving gear and a III-gear driving gear are fixedly connected on a shaft, and a II-gear driving gear and a I-gear driving gear are sleeved on the shaft; the second-gear driven gear and the first-gear driven gear are fixedly connected to the second shaft, and the V-gear driven gear, the IV-gear driven gear and the III-gear driven gear are sleeved on the second shaft.
3. The 40F +40R powershift tractor transmission of claim 2, wherein: a shell of the clutch with the second gear and a shell of the clutch with the first gear are fixedly connected on a shaft, a shell of the clutch with the V gear and a shell of the clutch with the fourth gear are fixedly connected on a shaft, a driven gear with the second gear is adjacent to the shell of the clutch with the V gear, and the driven gear with the first gear is adjacent to the shell of the clutch with the fourth gear.
4. The 40F +40R powershift tractor transmission of claim 1, wherein: in the power reversing transmission device, a forward gear and a reverse gear driven gear are sleeved on three shafts, a shell of a forward clutch is welded on the forward gear, and a shell of a reverse clutch is welded on the reverse gear driven gear; the reverse gear first-stage idler wheel and the reverse gear second-stage idler wheel are fixedly connected to the six shaft.
5. The 40F +40R powershift tractor transmission of claim 1, wherein: the crawling gear output shaft is fixedly connected with the input end of the five shaft through a connecting sleeve.
6. The 40F +40R powershift tractor transmission of claim 1, wherein: the climbing gear duplex gear is fixedly connected to a climbing gear idler shaft, the climbing gear duplex gear comprises a climbing gear one-level driven gear and a climbing gear two-level driving gear, the climbing gear two-level driven gear is sleeved on a climbing gear output shaft, and the climbing gear shifting mechanism is connected to the climbing gear output shaft through splines.
7. The 40F +40R powershift tractor transmission of claim 1, wherein: in the section gear shifting transmission device, an LL gear driving gear, an L gear driving gear and an M-V gear synchronizer are fixedly connected on a five shaft, the M gear driving gear and the V gear driving gear are sleeved on the five shaft, an LL gear driven gear and an L gear driven gear are sleeved on the four shaft, and the LL-L gear synchronizer, the M gear driven gear and the V gear driven gear are fixedly connected on the four shaft.
8. The 40F +40R powershift tractor transmission of claim 1, wherein: the six shafts and the seven shafts are arranged at the same side of the three shafts.
9. The 40F +40R powershift tractor transmission of claim 1, wherein: the first-gear clutch, the second-gear clutch, the third-gear clutch, the fourth-gear clutch, the V-gear clutch, the forward clutch and the reverse clutch are all normally-separated electro-hydraulic control wet-type multi-plate clutches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011418280.XA CN112664624A (en) | 2020-12-07 | 2020-12-07 | Gearbox of 40F +40R power gear-shifting tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011418280.XA CN112664624A (en) | 2020-12-07 | 2020-12-07 | Gearbox of 40F +40R power gear-shifting tractor |
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| Publication Number | Publication Date |
|---|---|
| CN112664624A true CN112664624A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011418280.XA Pending CN112664624A (en) | 2020-12-07 | 2020-12-07 | Gearbox of 40F +40R power gear-shifting tractor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087324A (en) * | 2021-11-29 | 2022-02-25 | 广东皓耘科技有限公司 | Power shift gearbox and tractor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486313A (en) * | 2009-02-19 | 2009-07-22 | 中国一拖集团有限公司 | Load shift of tractor and load reversing transmission gear |
| CN104723867A (en) * | 2015-03-20 | 2015-06-24 | 第一拖拉机股份有限公司 | 48F+41R load gear shifting tractor gearbox with crawling gear |
| CN204553716U (en) * | 2015-02-13 | 2015-08-12 | 河南省力神机械有限公司 | Tractor portion power gear shifting transmission device |
-
2020
- 2020-12-07 CN CN202011418280.XA patent/CN112664624A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486313A (en) * | 2009-02-19 | 2009-07-22 | 中国一拖集团有限公司 | Load shift of tractor and load reversing transmission gear |
| CN204553716U (en) * | 2015-02-13 | 2015-08-12 | 河南省力神机械有限公司 | Tractor portion power gear shifting transmission device |
| CN104723867A (en) * | 2015-03-20 | 2015-06-24 | 第一拖拉机股份有限公司 | 48F+41R load gear shifting tractor gearbox with crawling gear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087324A (en) * | 2021-11-29 | 2022-02-25 | 广东皓耘科技有限公司 | Power shift gearbox and tractor |
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