A full power shift transmission structure

Abstract

The present invention provides a full-power shift transmission structure, which can achieve full-power shifting and power reversing. The overall layout is simple, the structure is compact, the operation is convenient, and the transmission efficiency is high. It can greatly improve the operation efficiency of the whole vehicle and reduce the labor intensity of the driver. It includes a dual-clutch transmission device, a dual-intermediate shaft transmission device, and a dual-planetary row transmission device; the dual-clutch transmission device includes a clutch shaft, two clutches, and two intermediate shaft drive gears. The two clutches share an outer hub, and the clutch shaft is fixedly connected to its shared outer hub; the dual-intermediate shaft transmission device includes a secondary shaft, two intermediate shafts, and multiple transmission gears. The multiple transmission gears are respectively connected to the secondary shaft and the two intermediate shafts to meet the different shifting and reversing operations of the tractor; the dual-planetary row transmission device includes an output shaft, two brakes, a planet carrier, a ring gear, and multiple planet gears. The two brakes are divided into a low-speed brake and a high-speed brake.

Description

Technical Field

[0001] The present invention relates to the technical field of transmissions, and particularly to a full-power shift transmission structure. Background Art

[0002] Power shift is to manipulate the engagement and disengagement of clutches or brakes through an electro-hydraulic control system to achieve shifting or reversing without power interruption. Power shift is divided into sectional power shift and full-power shift. Sectional power shift is to connect a manual shift transmission and a power shift transmission in series to achieve power shift for some gears, while full-power shift can achieve power shift for all gears.

[0003] The domestic engineering vehicle drive train mainly adopts mechanical shift forms such as dog clutch shift and synchronizer shift. For dog clutch shift, the driver operates the shift lever to drive the shift fork of the transmission to move the dog clutch into engagement with the gear. The operation during shifting is relatively cumbersome, requiring a series of operations such as stepping on the clutch, shifting gears, stepping on the clutch again, and engaging gears. The driving operation performance is not improved, and there is power interruption during the shifting process. Synchronizer shift is a device that synchronizes the rotational speeds of the gears to be engaged through a synchronizer and then engages them. When shifting with a synchronizer, the gear can be directly engaged after stepping on the clutch to disengage the gear. To a certain extent, the shifting operation is simplified, but there is still power interruption during the shifting process. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a full-power shift transmission structure, which can achieve full-power shift and power reversing, has a simple overall layout, is compact in structure, convenient to operate, has high transmission efficiency, can greatly improve the operation efficiency of the whole vehicle, and reduce the labor intensity of the driver.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A full-power shift transmission structure includes a dual-clutch transmission device, a dual-intermediate shaft transmission device, and a dual-planetary row transmission device;

[0007] The dual-clutch transmission device includes a clutch shaft, two clutches, and two intermediate shaft drive gears. Among them, the two clutches share an outer hub, the clutch shaft is fixedly connected to the shared outer hub of the two clutches, the two intermediate shaft drive gears are respectively sleeved on the clutch shaft, and the two intermediate shaft drive gears are respectively fixedly connected to the inner hubs of the two clutches;

[0008] The dual-intermediate shaft transmission device includes a second shaft, two intermediate shafts, and multiple transmission gears. Among them, the multiple transmission gears are respectively connected to the second shaft and the two intermediate shafts to meet the different shifting and reversing operations of the tractor;

[0009] The double planetary gear train transmission device includes an output shaft, two brakes, a planet carrier, a ring gear, and multiple planet gears. Among them, the multiple planet gears are sleeved on the planet carrier, the outer hubs of the two brakes are respectively fixedly connected to the housing of the transmission. The two brakes are divided into a low gear brake and a high gear brake. The ring gear is fixedly connected to the inner hub of the low gear brake, the planet carrier is fixedly connected to the inner hub of the high gear brake, and an output shaft sun gear is fixedly connected to the output shaft.

[0010] Preferably, the multiple transmission gears include 16 forward gears and 4 reverse gears. Among them, the 16 forward gears are divided into 8 low gear forward gears and 8 high gear forward gears, and the 4 reverse gears are divided into 2 low gear reverse gears and 2 high gear reverse gears. When the transmission is in the main gear of the low gear, the low gear brake is combined with the corresponding clutch and transmission gear. When the transmission is in the main gear of the high gear, the high gear brake is combined with the corresponding clutch and transmission gear.

[0011] Preferably, the clutch adopts two sets of dry single-plate electromagnetic clutches, dry multi-plate electromagnetic clutches or wet multi-plate electromagnetic clutches coaxially installed.

[0012] Preferably, speed sensors for detecting the rotational speeds of each shaft are respectively arranged on the clutch shaft, the second shaft, the two intermediate shafts and the output shaft.

[0013] Preferably, the two intermediate shafts are divided into a first intermediate shaft and a second intermediate shaft. Among them, a first intermediate shaft drive gear, a first intermediate shaft third / fourth gear synchronizer, a first intermediate shaft first / second gear synchronizer and a first intermediate shaft reverse gear synchronizer are fixedly connected to the first intermediate shaft. A first intermediate shaft fourth gear, a first intermediate shaft third gear, a first intermediate shaft second gear, a first intermediate shaft first gear and a first intermediate shaft reverse gear are sleeved on the first intermediate shaft; A second intermediate shaft drive gear, a second intermediate shaft third / fourth gear synchronizer, a second intermediate shaft first / second gear synchronizer and a second intermediate shaft reverse gear synchronizer are fixedly connected to the second intermediate shaft. A second intermediate shaft fourth gear, a second intermediate shaft third gear, a second intermediate shaft second gear, a second intermediate shaft first gear and a second intermediate shaft reverse gear are sleeved on the second intermediate shaft.

[0014] Preferably, a second shaft fourth gear, a second shaft third gear, a second shaft second gear, a second shaft first gear, a second shaft reverse gear and a second shaft sun gear are fixedly connected to the second shaft.

[0015] Preferably, a first intermediate shaft reverse idler gear is arranged between the second shaft reverse gear and the first intermediate shaft reverse gear, and a second intermediate shaft reverse idler gear is arranged between the second shaft reverse gear and the second intermediate shaft reverse gear.

[0016] Preferably, the planet gears include a first planet gear and a second planet gear evenly distributed circumferentially along the planet carrier, and the first planet gear is fixedly connected to the second planet gear.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a full power shift transmission structure, which uses a transmission structure composed of a dual clutch transmission device, a dual intermediate shaft transmission device and a dual planetary row transmission device to work together to transmit power. Among them, through the installation of five groups of corresponding constantly meshing shift gears and six synchronizers, it can not only better solve the problem of power interruption, but also be applicable to various complex load operations and working conditions with a large number of gear requirements. It can achieve full power shifting and power reversing within the range of 16 forward gears and 4 reverse gears. The overall layout is simple, the structure is compact, the operation is simple, and the transmission efficiency is high, which can greatly improve the vehicle operation efficiency and reduce the driver's labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the power transmission route of the transmission of the present invention.

[0020] In the figure, 1 - first intermediate shaft drive gear, 2 - first intermediate shaft transmission gear, 3 - second intermediate shaft drive gear, 4 - second intermediate shaft transmission gear, 5 - second shaft fourth gear, 6 - second shaft third gear, 7 - second shaft second gear, 8 - second shaft first gear, 9 - second shaft reverse gear, 10 - first intermediate shaft fourth gear, 11 - first intermediate shaft third gear, 12 - first intermediate shaft second gear, 13 - first intermediate shaft first gear, 14 - first intermediate shaft reverse gear, 15 - first intermediate shaft reverse idler gear, 16 - second intermediate shaft fourth gear, 17 - second intermediate shaft third gear, 18 - second intermediate shaft second gear, 19 - second intermediate shaft first gear, 20 - second intermediate shaft reverse gear, 21 - second intermediate shaft reverse idler gear, 22 - second shaft sun gear, 23 - first planet gear, 24 - ring gear, 25 - second planet gear, 26 - planet carrier, 27 - output shaft sun gear, E - engine, F - output connector, C1 - first clutch, C2 - second clutch, B1 - low gear brake, B2 - high gear brake, T1 - first intermediate shaft third and fourth gear synchronizer, T2 - first intermediate shaft first and second gear synchronizer, T3 - first intermediate shaft reverse gear synchronizer, T4 - second intermediate shaft third and fourth gear synchronizer, T5 - second intermediate shaft first and second gear synchronizer, T6 - second intermediate shaft reverse gear synchronizer, S1 - clutch shaft, S2 - first intermediate shaft, S3 - second intermediate shaft, S4 - second shaft, S5 - output shaft, N1 - first speed sensor, N2 - second speed sensor, N3 - third speed sensor, N4 - fourth speed sensor, N5 - fifth speed sensor. DETAILED DESCRIPTION OF THE INVENTION

[0021] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings:

[0024] As Figure 1 shown, a full-power shift transmission structure of the present invention includes a dual-clutch transmission device, a dual-intermediate-shaft transmission device, and a dual-planetary-gear train transmission device;

[0025] In the dual-clutch transmission device: the dual clutch is composed of a first clutch C1 and a second clutch C2. The dual clutch shares an outer hub. The clutch shaft S1 is fixedly connected to the shared outer hub of the dual clutch. The first intermediate shaft drive gear 1 and the second intermediate shaft drive gear 3 are sleeved on the clutch shaft S1. The first intermediate shaft drive gear 1 is fixedly connected to the inner hub of the first clutch C1, and the second intermediate shaft drive gear 3 is fixedly connected to the inner hub of the second clutch C2.

[0026] In the dual-intermediate-shaft transmission device: the first intermediate shaft transmission gear 2, the first intermediate shaft third / fourth gear synchronizer T1, the first intermediate shaft first / second gear synchronizer T2, and the first intermediate shaft reverse gear synchronizer T3 are fixedly connected to the first intermediate shaft S2. The first intermediate shaft fourth gear 10, the first intermediate shaft third gear 11, the first intermediate shaft second gear 12, the first intermediate shaft first gear 13, and the first intermediate shaft reverse gear 14 are sleeved on the first intermediate shaft S2.

[0027] Among them, the first intermediate shaft fourth gear 10 and the first intermediate shaft third gear 11 work together with the first intermediate shaft third / fourth speed synchronizer T1. The first intermediate shaft second gear 12 and the first intermediate shaft first gear 13 work together with the first intermediate shaft first / second speed synchronizer T2. The first intermediate shaft reverse gear 14 works together with the first intermediate shaft reverse synchronizer T3.

[0028] The second intermediate shaft drive gear 4, the second intermediate shaft third / fourth speed synchronizer T4, the second intermediate shaft first / second speed synchronizer T5, and the second intermediate shaft reverse synchronizer T6 are fixedly connected to the second intermediate shaft S3. The second intermediate shaft fourth gear 16, the second intermediate shaft third gear 17, the second intermediate shaft second gear 18, the second intermediate shaft first gear 19, and the second intermediate shaft reverse gear 20 are sleeved on the second intermediate shaft S3.

[0029] Among them, the second intermediate shaft fourth gear 16 and the second intermediate shaft third gear 17 work together with the second intermediate shaft third / fourth speed synchronizer T4. The second intermediate shaft second gear 18 and the second intermediate shaft first gear 19 work together with the second intermediate shaft first / second speed synchronizer T5. The second intermediate shaft reverse gear 20 works together with the second intermediate shaft reverse synchronizer T6.

[0030] Among them, the second shaft fourth gear 5, the second shaft third gear 6, the second shaft second gear 7, the second shaft first gear 8, the second shaft reverse gear 9, and the second shaft sun gear 22 are fixedly connected to the second shaft S4. A first intermediate shaft reverse idler gear 15 is arranged between the second shaft reverse gear 9 and the first intermediate shaft reverse gear 14, and a second intermediate shaft reverse idler gear 21 is arranged between the second shaft reverse gear 9 and the second intermediate shaft reverse gear 20. The first intermediate shaft reverse idler gear 15 and the second intermediate shaft reverse idler gear 21 do not affect the transmission ratio, but only change the transmission direction, making the shift and reverse conversion smoother.

[0031] In the double planetary row transmission device: The first planet gear 23 is fixedly connected to the second planet gear 25 and is circumferentially evenly distributed. The first planet gear 23 and the second planet gear 25 are sleeved on the planet carrier 26, and the first planet gear 23 is fixedly connected to the second planet gear 25. The outer hubs of the low gear brake B1 and the high gear brake B2 are respectively fixedly connected to the transmission housing. The ring gear 24 is fixedly connected to the inner hub of the low gear brake B1, and the planet carrier 26 is fixedly connected to the inner hub of the high gear brake B2. The output shaft sun gear 27 is fixedly connected to the output shaft S5.

[0032] In the full power shift transmission structure of the present invention, the clutch shaft S1 is fixedly connected to the engine E, and the output shaft S5 is fixedly connected to the output connector F.

[0033] Preferably, the clutch adopts two sets of dry single-plate electromagnetic clutches, dry multi-plate electromagnetic clutches, or wet multi-plate electromagnetic clutches installed coaxially.

[0034] Further, speed sensors for detecting the rotational speeds of respective shafts are disposed on the clutch shaft, the second shaft, the two intermediate shafts, and the output shaft, specifically including: a first speed sensor N1, a second speed sensor N2, a third speed sensor N3, a fourth speed sensor N4, and a fifth speed sensor N5. Among them, the first speed sensor N1 is used to measure the rotational speeds of the engine E, the clutch shaft S1, and the common outer hub of the dual clutches C1 / C2; the second speed sensor N2 is used to measure the rotational speeds of the first intermediate shaft S2, its fixedly connected synchronizers T1 / T2 / T3, and the first intermediate shaft drive gear 2; the third speed sensor N3 is used to measure the rotational speeds of the second intermediate shaft S3, its fixedly connected synchronizers T4 / T5 / T6, and the second intermediate shaft drive gear 4; the fourth speed sensor N4 is used to measure the rotational speeds of the second shaft S4, its fixedly connected gears 5 / 6 / 7 / 8 / 9 / 22; and the fifth speed sensor N5 is used to measure the rotational speeds of the output shaft S5, its fixedly connected gear 27, and the output connecting member F.

[0035] The present invention provides a full-power shift transmission structure, which uses a transmission structure composed of a dual-clutch transmission device, a dual-intermediate-shaft transmission device, and a dual-planetary-gearset transmission device to work together to transmit power. Among them, through the installation of five groups of corresponding constantly meshing shift gears and six synchronizers, it can not only better solve the problem of power interruption, but also be applicable to various complex load operations and working conditions with a large number of gear requirements. It can achieve full-power shifting and power reversing within the range of 16 forward gears and 4 reverse gears. The overall layout is simple, the structure is compact, the operation is convenient, and the transmission efficiency is high, which can greatly improve the vehicle operation efficiency and reduce the labor intensity of the driver.

[0036] The working principle of the shifting and reversing of the tractor full-power shift transmission structure of the present invention will be described below in conjunction with the gear logic shown in Tables 1 and 2:

[0037] Before the vehicle starts, all clutches and brakes of the transmission are disengaged, and all synchronizers are in the neutral position. According to the actual working conditions, first select the main gear. When shifting to a low gear, the low-gear brake B1 is engaged; when shifting to a high gear, the high-gear brake B2 is engaged. When moving forward, the first intermediate shaft first / second gear synchronizer T2 and the first intermediate shaft first-gear 13 are first engaged, and then the first clutch C1 is engaged, and the vehicle moves forward; when moving backward, the second intermediate shaft reverse-gear synchronizer T6 and the second intermediate shaft reverse-gear 20 are first engaged, and then the second clutch C2 is engaged, and the vehicle moves backward.

[0038] When the transmission shifts up within the main gear position (B1 or B2), taking the shift from F1 to F2 in the low gear as an example, the state of F1 is maintained, that is, the low gear brake B1 and the first clutch C1 are engaged, and the first intermediate shaft first-second gear synchronizer T2 is engaged with the first intermediate shaft first gear 13; first, the second intermediate shaft first-second gear synchronizer T5 is engaged with the second intermediate shaft first gear 19, and then the first clutch C1 is disengaged and the second clutch C2 is engaged simultaneously. After the double-clutch shift is completed, the first intermediate shaft first-second gear synchronizer T2 is disengaged from the first intermediate shaft first gear 13, and the entire upshift process is completed. The downshift process within the main gear position is similar.

[0039] When the transmission reaches the highest gear in the low gear and needs to shift from low gear to high gear, that is, when shifting from F8 to F9, the state of F8 is maintained, that is, the low gear brake B1 and the second clutch C2 are engaged, and the second intermediate shaft third-fourth gear synchronizer T4 is engaged with the second intermediate shaft fourth gear 16; first, the first intermediate shaft first-second gear synchronizer T2 is engaged with the first intermediate shaft first gear 13, and then the low gear brake B1, the second clutch C2 are disengaged and the high gear brake B2, the first clutch C1 are engaged simultaneously. After the brake and clutch shift is completed, the second intermediate shaft third-fourth gear synchronizer T4 is disengaged from the second intermediate shaft fourth gear 16, and the entire low gear to high gear shift process is completed. The high gear to low gear shift process is similar.

[0040] When reversing, the upshift and downshift processes within the main gear position and the high-low gear shift process are similar to those when moving forward.

[0041] When the whole vehicle needs to perform power reversing during operation, taking the shift from F1 to R1 as an example, the state of F1 is maintained, that is, the low gear brake B1 and the first clutch C1 are engaged, and the first intermediate shaft first-second gear synchronizer T2 is engaged with the first intermediate shaft first gear 13; first, the second intermediate shaft reverse gear synchronizer T6 is engaged with the second intermediate shaft reverse gear 20, and then the first clutch C1 is disengaged and the second clutch C2 is engaged simultaneously. After the double-clutch shift is completed, the first intermediate shaft first-second gear synchronizer T2 is disengaged from the first intermediate shaft first gear 13, and the entire power reversing process is completed.

[0042] Table 1 Forward gear position logic

[0043]

[0044]

[0045] Table 2 Reverse gear position logic

[0046]

[0047] In Tables 1 and 2, F represents the forward gear and R represents the reverse gear.

[0048] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A full power shift transmission structure, characterized in that, it includes a dual clutch transmission device, a dual intermediate shaft transmission device and a dual planetary row transmission device; The dual clutch transmission device includes a clutch shaft, two clutches and two intermediate shaft drive gears. Among them, the two clutches share an outer hub, the clutch shaft is fixedly connected to the shared outer hub of the two clutches, the two intermediate shaft drive gears are respectively sleeved on the clutch shaft, and the two intermediate shaft drive gears are respectively fixedly connected to the inner hubs of the two clutches; The dual intermediate shaft transmission device includes a secondary shaft, two intermediate shafts and multiple transmission gears, and among them, the multiple transmission gears are respectively connected to the secondary shaft and the two intermediate shafts to meet different shifting and reversing operations of the tractor; A secondary shaft fourth gear (5), a secondary shaft third gear (6), a secondary shaft second gear (7), a secondary shaft first gear (8), a secondary shaft reverse gear (9) and a secondary shaft sun gear (22) are fixedly connected to the secondary shaft; The dual planetary row transmission device includes an output shaft, two brakes, a planet carrier (26), a ring gear (24) and multiple planet gears. Among them, the multiple planet gears are sleeved on the planet carrier (26), the outer hubs of the two brakes are respectively fixedly connected to the housing of the transmission, the two brakes are divided into a low gear brake and a high gear brake, the ring gear (24) is fixedly connected to the inner hub of the low gear brake, the planet carrier (26) is fixedly connected to the inner hub of the high gear brake, and an output shaft sun gear (27) is fixedly connected to the output shaft; The two intermediate shafts are divided into a first intermediate shaft and a second intermediate shaft. Among them, a first intermediate shaft drive gear (2), a first intermediate shaft third and fourth gear synchronizer (T1), a first intermediate shaft first and second gear synchronizer (T2) and a first intermediate shaft reverse gear synchronizer (T3) are fixedly connected to the first intermediate shaft. A first intermediate shaft fourth gear (10), a first intermediate shaft third gear (11), a first intermediate shaft second gear (12), a first intermediate shaft first gear (13) and a first intermediate shaft reverse gear (14) are sleeved on the first intermediate shaft; A second intermediate shaft drive gear (4), a second intermediate shaft third and fourth gear synchronizer (T4), a second intermediate shaft first and second gear synchronizer (T5) and a second intermediate shaft reverse gear synchronizer (T6) are fixedly connected to the second intermediate shaft. A second intermediate shaft fourth gear (16), a second intermediate shaft third gear (17), a second intermediate shaft second gear (18), a second intermediate shaft first gear (19) and a second intermediate shaft reverse gear (20) are sleeved on the second intermediate shaft; A first intermediate shaft reverse idler gear (15) is arranged between the secondary shaft reverse gear (9) and the first intermediate shaft reverse gear (14), and a second intermediate shaft reverse idler gear (21) is arranged between the secondary shaft reverse gear (9) and the second intermediate shaft reverse gear (20).

2. The full power shift transmission structure according to claim 1, characterized in that, The multiple transmission gears include 16 forward gears and 4 reverse gears. Among them, the 16 forward gears are divided into 8 low-speed forward gears and 8 high-speed forward gears, and the 4 reverse gears are divided into 2 low-speed reverse gears and 2 high-speed reverse gears. When the transmission is in the main gear of the low gear, the low gear brake is combined with the corresponding clutch and transmission gear. When the transmission is in the main gear of the high gear, the high gear brake is combined with the corresponding clutch and transmission gear.

3. A full power shift transmission structure according to claim 1, characterized in that, The clutch adopts two groups of dry single-plate electromagnetic clutches, dry multi-plate electromagnetic clutches or wet multi-plate electromagnetic clutches installed coaxially.

4. A full power shift transmission structure according to claim 1, characterized in that, Speed sensors for detecting the rotational speeds of respective shafts are respectively arranged on the clutch shaft, the second shaft, the two intermediate shafts and the output shaft.

5. A full power shift transmission structure according to claim 1, characterized in that, The planet gears include a first planet gear (23) and a second planet gear (25) evenly distributed circumferentially along the planet carrier (26), and the first planet gear is fixedly connected to the second planet gear.

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