An independently arranged auxiliary speed transmission system

Abstract

The present invention discloses an independently arranged auxiliary speed change transmission system, which is arranged separately in a housing connected to an engine, and includes a power input shaft, a power output shaft, a driven gear shaft matching the power input shaft and the power output shaft, and a primary gear pair connecting the power input shaft and the driven gear shaft, and a secondary gear pair connecting the driven gear shaft and the power output shaft, wherein the primary gear pair and the secondary gear pair are connected by a wet clutch or a synchronizer or a meshing sleeve, and the shifting function is realized in three different shifting modes. The present invention can be arranged independently, and can realize different functions and adapt to different operation requirements by flexibly changing a variety of structural modes, and has a wide range of applications and meets market demand. At the same time, the bearing load condition is relatively clear, and the reliability of the bearing after selection is relatively high. The lubrication system matched with it can also be independently designed on the basis of an independent structural arrangement, and is less affected by the main speed change transmission and the auxiliary speed change transmission, and the use performance is more reliable.

Description

Technical Field

[0001] The invention relates to a component of a tractor transmission system, in particular to an independently arranged auxiliary speed change transmission system. Background Art

[0002] The continuous improvement of agricultural production efficiency requires more gears to meet the needs of agricultural development.

[0003] The tractor chassis transmission system is divided into the main transmission system and the PTO transmission system. The main transmission system includes the main speed transmission system and the auxiliary speed transmission system. At present, most tractor chassis are mechanical transmission assemblies, with a main speed transmission and an auxiliary speed transmission system. In addition to the auxiliary speed transmission body, the market demands a variety of auxiliary speed transmissions: shuttle reversing, or power reversing; crawling gear, or Hi-Lo gear 2-speed power shift; or more. Usually the main speed is 4 gears including 1 forward gear, and the auxiliary speed is 3 or 4 gears. The auxiliary speed transmission is arranged at the rear end of the main speed transmission. The total number of gears in the transmission system is F12xR4, or F8xR4.

[0004] At present, the gear structure forms on the market are mostly inside the auxiliary transmission system behind the main transmission, or in the front section of the main transmission, effectively combined with the main transmission to form a non-independent additional auxiliary transmission system. The functions are relatively simple, unable to adapt to different operating requirements, with a small scope of application, and increasingly difficult to meet market demand. Summary of the invention

[0005] In order to solve the defects and shortcomings in the above-mentioned prior art, the present invention provides a kind of independently arranged auxiliary transmission system, which can realize different functions and adapt to different operation requirements by flexibly changing a variety of structural modes, has a wide range of applications, and meets market demand. At the same time, the bearing load-bearing conditions are relatively clear, and the reliability of the selected bearings is relatively high. The lubrication system of the power reversing or power shifting matched therewith can be independently designed on the basis of the independent structural arrangement, and is not affected by the main speed transmission and the auxiliary speed transmission, so that the use performance is more reliable.

[0006] The technical solution of the present invention is: an independently arranged auxiliary speed transmission system, which is separately arranged in a housing connected to an engine, and includes a power input shaft, a power output shaft, a driven gear shaft matching the power input shaft and the power output shaft, and a primary gear pair connecting the power input shaft and the driven gear shaft, and a secondary gear pair connecting the driven gear shaft and the power output shaft. The primary gear pair and the secondary gear pair are connected by a wet clutch or a synchronizer or a meshing sleeve, and the shifting function is realized in three different shifting modes.

[0007] The present invention can be arranged independently, and can realize different functions and adapt to different operation requirements by flexibly changing a variety of structural modes. It has a wide range of applications and meets market demand. At the same time, the bearing load-bearing conditions are relatively clear, and the reliability of the selected bearings is relatively high. It can also enable the lubrication system of the power reversing or power shifting matched therewith to be independently designed on the basis of an independent structural arrangement, without being affected by the main speed transmission and the auxiliary speed transmission, and the performance of use is more reliable.

[0008] Preferably, the power input shaft is supported in the housing by two input shaft bearings, and the two input shaft bearings are both at the input end of the power input shaft, the two ends of the driven gear shaft are respectively supported by two gear shaft bearings, and the power output shaft is supported by two output shaft bearings, and the two output shaft bearings are both arranged at the output end of the power output shaft and connected to the input shaft of the main speed transmission system.

[0009] Preferably, the two input shaft bearings are respectively the first input shaft bearing on the inner side and the second input shaft bearing on the outer side, the two output shaft bearings are respectively the first output shaft bearing on the inner side and the second output shaft bearing on the outer side, the two gear shaft bearings are respectively the first gear shaft bearing at one end and the second gear shaft bearing at the other end, the position of the first input shaft bearing corresponds to the position of the first gear shaft bearing, and the position of the first output shaft bearing corresponds to the position of the second gear shaft bearing.

[0010] Preferably, the power input shaft and the power output shaft are coaxially arranged, and the driven gear shaft is arranged in parallel and below the power input shaft and the power output shaft.

[0011] Preferably, the primary gear pair and the secondary gear pair are connected by two wet clutches, and the two wet clutches are both located on the power input shaft.

[0012] Preferably, the primary gear pair and the secondary gear pair are connected by two wet clutches, wherein one wet clutch is located on the power input shaft and the other wet clutch is located on the driven gear shaft.

[0013] Preferably, the sub-speed transmission system also includes a three-stage gear pair, the first-stage gear pair connecting one end of the power input shaft and one end of the driven gear shaft, the second-stage gear pair connecting the middle of the driven gear shaft and one end of the power output shaft, and the third-stage gear pair connecting the other end of the driven gear shaft and the other end of the power output shaft.

[0014] Preferably, the first-stage gear pair and the second-stage gear pair are connected by a wet clutch, which is located on the power input shaft, and the second-stage gear pair and the third-stage gear pair are connected by two wet clutches, which are located on the driven gear shaft.

[0015] Preferably, the primary gear pair and the secondary gear pair are connected by a synchronizer or a meshing sleeve, and the synchronizer or the meshing sleeve is located on the power input shaft.

[0016] Preferably, the primary gear pair and the secondary gear pair are connected by two synchronizers or meshing sleeves, one of which is located on the power input shaft, and the other is located on the driven gear shaft.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. A structural form can be arranged independently. On the basis of the gear positions of the original transmission system, the present structural form can be connected in series to increase the number of gear positions by 2 times or more. For example, the original number of gear positions F12xR4 can realize the F16xR16 shuttle shift arrangement or power reversing arrangement; it can also realize F24xR8, mechanical shift with crawler gear function or Hi-Lo gear 2-stage power shift, or realize F32 xR16 mechanical shift with crawler gear function or Hi-Lo-R gear 3-stage power shift;

[0019] 2. Flexible change of various structural modes to achieve different functions, adapt to different operating requirements and meet market demands; the optional functions mainly include: shuttle gear synchronizer or meshing sleeve, power reversing, crawler gear synchronizer or meshing sleeve, Hi-Lo gear 2-stage power shift, Hi-Lo-R gear 3-stage power shift;

[0020] 3. Each shaft is supported by two separate bearings. The shaft runs smoothly after being stressed, and the bearing load condition is relatively clear. The selected bearings have high reliability, which can increase the bearing life by more than 30% compared with the current cantilever single bearing arrangement mode.

[0021] 4. It can also make the lubrication system of power reversing or power shifting matched with it be independently designed based on independent structural layout, which is less affected by the lubrication system of main speed transmission and auxiliary speed transmission, reduces the design risk, and makes the performance and reliability more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0026] Figure 5This is a schematic diagram of the structure of Embodiment 5 of the present invention;

[0027] In the figure, 1. power input shaft, 2. power output shaft, 3. driven gear shaft, 4. primary gear pair, 5. secondary gear pair, 6. first input shaft bearing, 7. second input shaft bearing, 8. first output shaft bearing, 9. second output shaft bearing, 10. first gear shaft bearing, 11. second gear shaft bearing, 12. tertiary gear pair, 13. housing, 14. input shaft of main speed transmission system, 15. wet clutch, 16. synchronizer or meshing sleeve. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings and embodiments, but they are not intended to limit the protection scope of the present invention.

[0029] Example 1

[0030] like Figure 1 As shown, an independently arranged auxiliary speed change transmission system is separately arranged in a housing 13 connected to the engine, and includes a power input shaft 1, a power output shaft 2, a driven gear shaft 3 matching the power input shaft 1 and the power output shaft 2, a primary gear pair 4 connecting the power input shaft 1 and the driven gear shaft 3, and a secondary gear pair 5 connecting the driven gear shaft 3 and the power output shaft 2.

[0031] The power input shaft 1 is supported in the housing 13 by two input shaft bearings, and the two input shaft bearings are both at the input end of the power input shaft 1. The two ends of the driven gear shaft 3 are supported by two gear shaft bearings respectively. The power output shaft 2 is supported by two output shaft bearings, and the two output shaft bearings are both arranged at the output end of the power output shaft 2 and connected to the input shaft 14 of the main transmission system. The two input shaft bearings are respectively the first input shaft bearing 6 on the inner side and the second input shaft bearing 7 on the outer side, the two output shaft bearings are respectively the first output shaft bearing 8 on the inner side and the second output shaft bearing 9 on the outer side, and the two gear shaft bearings are respectively the first gear shaft bearing 10 on one end and the second gear shaft bearing 11 on the other end, the position of the first input shaft bearing 6 corresponds to the position of the first gear shaft bearing 10, and the position of the first output shaft bearing 8 corresponds to the position of the second gear shaft bearing 11. The power input shaft 1 and the power output shaft 2 are coaxially arranged, and the driven gear shaft 3 is arranged in parallel below the power input shaft 1 and the power output shaft 2.

[0032] The primary gear pair 4 and the secondary gear pair 5 are connected by two wet clutches 15 , and both wet clutches 15 are located on the power input shaft 1 .

[0033] This embodiment implements a power shift or powershift mode.

[0034] Example 2

[0035] like Figure 2 As shown, the first gear pair 4 and the second gear pair 5 are connected by two wet clutches 15 , one of which is located on the power input shaft 1 , and the other is located on the driven gear shaft 3 .

[0036] This embodiment realizes a Hi-Lo 2-speed power shift mode.

[0037] Example 3

[0038] The secondary speed change transmission system also includes a three-stage gear pair 12, the first-stage gear pair 4 connects one end of the power input shaft 1 and one end of the driven gear shaft 3, the second-stage gear pair 5 connects the middle of the driven gear shaft 3 and one end of the power output shaft 2, and the third-stage gear pair 12 connects the other end of the driven gear shaft 3 and the other end of the power output shaft 2. The first-stage gear pair 4 and the second-stage gear pair 5 are connected by a wet clutch 15, and the wet clutch is located on the power input shaft 1, and the second-stage gear pair 5 and the third-stage gear pair 12 are connected by two wet clutches 15, and the two wet clutches are located on the driven gear shaft 3.

[0039] This embodiment realizes Hi-Lo-R 3-speed power shift, that is, Hi-Lo power shift + reverse power shift mode.

[0040] Example 4

[0041] The first gear pair 4 and the second gear pair 5 are connected by a synchronizer or a meshing sleeve 16 , and the synchronizer or the meshing sleeve is located on the power input shaft 1 .

[0042] This embodiment realizes the reversing or shifting mode of the mechanical synchronizer or the clutch sleeve.

[0043] Example 5

[0044] The primary gear pair 4 and the secondary gear pair 5 are connected by two synchronizers or meshing sleeves 16 , one of which is located on the power input shaft 1 , and the other is located on the driven gear shaft 3 .

[0045] This embodiment implements a mechanical crawler gear mode.

[0046] The present invention is applicable to tractor chassis whose main speed transmission system is a mechanical plane composition type, a mechanical space composition type, and a partial power shift. At the front end, that is, between the engine and the main speed transmission system, the structure of the present invention can be independently arranged and connected in series with the main speed transmission system to jointly form a chassis transmission system with more powerful functions; the shifting function of the shuttle gear of the mechanical mechanical engagement sleeve or synchronizer can be realized, and the structural mode of the power reversal of the wet clutch can also be compatible. This structural mode can be transformed into a crawling gear structural form of a mechanical engagement sleeve or synchronizer, and can also be compatible with the Hi-Lo gear or Hi-Lo-R gear of the wet clutch. The number of tractor gears is increased by 2 times or more on the original basis.

Claims

1. An independently arranged auxiliary speed change transmission system, characterized in that: The auxiliary speed change transmission system is arranged separately in a housing (13) connected to the engine, and comprises a power input shaft (1), a power output shaft (2), a driven gear shaft (3) matching the power input shaft (1) and the power output shaft (2), a primary gear pair (4) connecting the power input shaft (1) and the driven gear shaft (3), and a secondary gear pair (5) connecting the driven gear shaft (3) and the power output shaft (2); the primary gear pair (4) and the secondary gear pair (5) are connected by a wet clutch or a synchronizer or a meshing sleeve, and the gear shifting function is realized in three different gear shifting modes; the power input shaft (1) is supported in the housing (13) by two input shaft bearings, and the two input shaft bearings are both at the input end of the power input shaft (1); the two ends of the driven gear shaft (3) are respectively supported by two gear shaft bearings; the power output shaft (2) is supported by two output shaft bearings. The invention relates to a transmission system comprising a transmission element and a transmission element for transmitting the power of the transmission element to the driven gear. The transmission element comprises a first gear shaft bearing (10) and a second gear shaft bearing (11). The first gear shaft bearing (10) and the second gear shaft bearing (11) are supported by the transmission element, and the two output shaft bearings are arranged at the output end of the power output shaft (2) and connected to the input shaft (14) of the main transmission system; the two input shaft bearings are respectively an inner first input shaft bearing (6) and an outer second input shaft bearing (7); the two output shaft bearings are respectively an inner first output shaft bearing (8) and an outer second output shaft bearing (9); the two gear shaft bearings are respectively a first gear shaft bearing (10) at one end and a second gear shaft bearing (11) at the other end; the position of the first input shaft bearing (6) corresponds to the position of the first gear shaft bearing (10); the position of the first output shaft bearing (8) corresponds to the position of the second gear shaft bearing (11); the power input shaft (1) and the power output shaft (2) are coaxially arranged, and the driven gear shaft (3) is arranged in parallel and below the power input shaft (1) and the power output shaft (2).

2. The independently arranged auxiliary speed change transmission system according to claim 1, characterized in that: The first-stage gear pair (4) and the second-stage gear pair (5) are connected by two wet clutches, and the two wet clutches are both located on the power input shaft (1).

3. The independently arranged auxiliary speed change transmission system according to claim 1, characterized in that: The first-stage gear pair (4) and the second-stage gear pair (5) are connected by two wet clutches, one of which is located on the power input shaft (1) and the other is located on the driven gear shaft (3).

4. The independently arranged auxiliary speed change transmission system according to claim 1, characterized in that: The auxiliary speed change transmission system further comprises a three-stage gear pair (12), wherein the first-stage gear pair (4) connects one end of the power input shaft (1) and one end of the driven gear shaft (3), the second-stage gear pair (5) connects the middle of the driven gear shaft (3) and one end of the power output shaft (2), and the third-stage gear pair (12) connects the other end of the driven gear shaft (3) and the other end of the power output shaft (2).

5. The independently arranged auxiliary speed change transmission system according to claim 4, characterized in that: The first-stage gear pair (4) and the second-stage gear pair (5) are connected by a wet clutch, and the wet clutch is located on the power input shaft (1); the second-stage gear pair (5) and the third-stage gear pair (12) are connected by two wet clutches, and the two wet clutches are located on the driven gear shaft (3).

6. The independently arranged auxiliary speed change transmission system according to claim 1, characterized in that: The first-stage gear pair (4) and the second-stage gear pair (5) are connected by a synchronizer or a meshing sleeve, and the synchronizer or the meshing sleeve is located on the power input shaft (1).

7. The independently arranged auxiliary speed change transmission system according to claim 1, characterized in that: The first-stage gear pair (4) and the second-stage gear pair (5) are connected by two synchronizers or meshing sleeves, one of which is located on the power input shaft (1) and the other is located on the driven gear shaft (3).

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