Three-gear hydraulic real-time four-wheel-drive agricultural machinery gearbox

Abstract

The utility model relates to the technical field of gearboxes, in particular to a three-gear hydraulic real-time four-wheel-drive agricultural machinery gearbox. Comprising a gearbox shell, a third-gear hydraulic transmission mechanism and a brake hub transmission mechanism, the third-gear hydraulic transmission mechanism and the brake hub transmission mechanism are arranged in the gearbox shell, the third-gear hydraulic transmission mechanism comprises a first shaft, a second shaft and a third shaft which are arranged from top to bottom, an inner flange plate is arranged on one side of the third shaft, and the inner flange plate transmits power to a front drive axle; a brake hub transmission mechanism is arranged on one side of the third shaft and comprises an outer flange plate and a brake assembly, and the outer flange plate transmits power to the rear drive axle and conducts braking through the brake assembly. By improving the three-gear hydraulic transmission mechanism and the brake hub transmission mechanism, four-wheel drive of the front drive axle and the rear drive axle is achieved at the same time, and the four-wheel drive transmission mechanism is suitable for being used in gearboxes of agricultural vehicles on the bumpy, pothole, soft and difficult-to-walk occasions such as mountainous regions.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, concretely relates to a three gear hydraulic real -time four -wheel drive agricultural machinery gearbox. BACKGROUND

[0002] In the field of agricultural machinery, especially in the complex terrain operation environment such as mountainous area, hilly land, the driving performance and adaptability of agricultural vehicle face higher requirements. The traditional gearbox is difficult to maintain efficient and stable driving on the uneven, pitted and soft ground, especially when independent driving is needed to adapt to the different size tires of ordinary gearbox, for example, Chinese patent CN210290617U discloses a four-wheel drive gearbox, realizes the transmission of engine power to front and rear drive axle, achieves four-wheel drive effect, but still has the above problems. Therefore, it is very important to develop a four-wheel drive gearbox that can adjust the driving state in real time and adapt to complex terrain. The gearbox needs to optimize the front and rear wheel driving force distribution to ensure efficient and stable driving performance in various terrains. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a three gear hydraulic real-time four-wheel drive agricultural machinery gearbox.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A three gear hydraulic real-time four-wheel drive agricultural machinery gearbox, comprising a gearbox shell, and a three gear hydraulic transmission mechanism and a brake hub transmission mechanism arranged in the gearbox shell, wherein the three gear hydraulic transmission mechanism comprises a first shaft, a second shaft and a third shaft arranged from top to bottom, a driving gear on the first shaft is engaged with a driven gear of the second shaft through a shift mechanism, and the second shaft output is engaged with the third shaft gear; One side of the third shaft is provided with an inner flange plate, the inner flange plate transmits power to the front drive axle; One side of the third shaft is provided with a brake hub transmission mechanism, the brake hub transmission mechanism comprises an outer flange plate and a brake assembly, the outer flange plate transmits power to the rear drive axle and brakes through the brake assembly.

[0006] The technical scheme improves the three-gear hydraulic transmission mechanism and the brake hub transmission mechanism, realizes four-wheel drive of the front drive axle and the rear drive axle at the same time, and is suitable for the use of the gearbox of the agricultural vehicle in the rugged and uneven, pitted and soft ground that is not easy to walk. Specifically, the overall compactness of the gearbox housing, the three-gear hydraulic transmission mechanism and the brake hub transmission mechanism in the housing are responsible for power transmission and brake control respectively, the driving gear on the first shaft is engaged with the driven gear of the second shaft through the gear shifting mechanism, different transmission ratios are formed, three-gear shifting is realized, the output gear of the second shaft is engaged with the gear of the third shaft, power is transmitted to the third shaft, and then transmitted to the front drive axle through the inner flange plate to realize the front drive of the tire; the outer flange plate on the other side of the third shaft transmits power to the rear drive axle and controls the brake through the brake assembly to realize the rear drive and brake of the tire; the three-gear hydraulic transmission mechanism realizes power control through the hydraulic motor, and the gear shifting mechanism realizes the engagement and separation of the gears through the fork shaft and the shift fork to change the transmission ratio, so that the four-wheel drive is controlled in real time according to the road conditions, and the adaptability of the agricultural vehicle is improved.

[0007] In addition, the three-gear hydraulic real-time four-wheel drive agricultural vehicle gearbox according to the above-mentioned technical scheme of the utility model can further have the following additional technical features:

[0008] According to one embodiment of the utility model, the first shaft is sequentially provided with a one-gear driving gear, a two-gear driving gear and a three-gear driving gear from right to left; the second shaft is sequentially provided with a one-gear tooth hub, a one-gear driven gear, a two-axis output gear, a two-gear driven gear, a two-three-gear tooth hub and a three-gear driven gear from right to left; and the third shaft is provided with a third shaft gear.

[0009] The one-gear driving gear is engaged with the one-gear driven gear, and the one-gear driving gear drives the one-gear driven gear to rotate.

[0010] The two-gear driven gear is engaged with the two-gear driven gear, and the two-gear driving gear drives the two-gear driven gear to rotate.

[0011] The three-gear driving gear is engaged with the three-gear driven gear, and the three-gear driving gear drives the three-gear driven gear to rotate.

[0012] The two-axis output gear is engaged with the third shaft gear, and the two-axis output gear drives the third shaft gear to rotate to transmit power to the third shaft.

[0013] The technical scheme sets the one-gear to three-gear driving gear on the first shaft, configures the corresponding gear driven gear and tooth hub on the second shaft, and engages the second shaft gear to realize the power transmission path: the first shaft driving gear drives the second shaft driven gear to complete gear shifting, and then the power is output to the third shaft through the engagement of the second shaft output gear and the third shaft gear to realize multi-gear mechanical transmission.

[0014] According to one embodiment of the utility model, the gear shifting mechanism comprises a first gear shift lever shaft on the right side, and a first gear shift fork below the first gear shift lever shaft, wherein the first gear shift fork is connected with a first gear hub, and when the first gear hub is engaged with a first driven gear, power is transmitted to a second shaft;

[0015] The gear shifting mechanism further comprises a second and third gear shift lever shaft on the left side, and a second and third gear shift fork below the second and third gear shift lever shaft, wherein the second and third gear shift fork is connected with a second and third gear hub, and when the right side of the second and third gear hub is engaged with the second driven gear, power is transmitted to the second shaft; and when the left side of the second and third gear hub is engaged with a third driven gear, power is transmitted to the second shaft.

[0016] The technical solution of the utility model realizes multi-gear shifting control of power by setting the first gear shift fork and the second and third gear shift fork on the first gear shift lever shaft and the second and third gear shift lever shaft respectively, and linking them with corresponding gear hubs, and selecting different gears by horizontal movement of the gear hubs.

[0017] According to one embodiment of the utility model, the first gear shift lever shaft and the second and third gear shift lever shaft are both installed in the transmission case through bearings, and the first gear shift fork and the second and third gear shift fork are provided with positioning grooves, which cooperate with the positioning devices in the transmission case.

[0018] The technical solution of the utility model realizes axial movement limiting of the shift lever shaft and position fixing of the shift fork by installing the first gear shift lever shaft and the second and third gear shift lever shaft in the transmission case through bearings, and setting the positioning grooves / holes on the shift fork to cooperate with the positioning devices in the case, controls the stability of gear engagement in the gear shifting process, and improves the accuracy of gear positioning.

[0019] According to one embodiment of the utility model, the brake assembly comprises a brake disc, a brake caliper and a hydraulic control component, the brake disc is connected to the outer flange, the hydraulic control component applies pressure to the brake caliper, the brake caliper clamps the brake disc, and the brake of the rear drive axle is realized.

[0020] The technical solution of the utility model realizes the speed reduction or parking control of the rear drive axle by fixing the brake disc on the outer flange, and applying clamping force to the brake disc by the brake caliper driven by the hydraulic control component to form a friction braking torque.

[0021] According to one embodiment of the utility model, the transmission case is further provided with a gear shifting support and a shift lever shaft end cover; the gear shifting support is fixed on the transmission case near the left side of the first shaft, and is used for supporting the rotation of the shift lever shaft; and the shift lever shaft end cover is located at the end of the first gear shift lever shaft, and is used for preventing leakage of lubricating oil.

[0022] The technical solution of the utility model realizes the dual functions of rotation support of the shift lever shaft and leakage prevention of lubricating oil by setting the gear shifting support and the shift lever shaft end cover on the outside of the transmission case, improves the stability of gear shifting operation of the transmission case and the reliability of the internal lubricating environment.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The technical scheme improves the three-gear hydraulic transmission mechanism and the brake hub transmission mechanism, realizes four-wheel drive of the front drive axle and the rear drive axle at the same time, and is suitable for the use of the transmission of the agricultural vehicle in the rugged and uneven, pitted and soft and not easy to walk occasions. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 It is one of the sectional views of the utility model.

[0026] Fig. 2 It is the second sectional view of the utility model.

[0027] Fig. 3 It is the side view of the utility model.

[0028] In the figure: 1, transmission housing; 2, a shaft; 21, one gear passive gear; 22, one gear tooth hub; 3, two shafts; 31, two shaft output gears; 32, two gear passive gears; 33, two three gear tooth hubs; 4, three shafts; 41, three active gears; 42, three passive gears; 43, three shaft gears; 44, inner flange plate; 45, outer flange plate; 5, shift mechanism; 51, one fork shaft; 52, one shift fork; 53, two three fork shafts; 54, two three shift forks; 6, brake hub transmission mechanism; 7, shift support; 8, fork shaft end cover. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0030] Embodiment 1

[0031] As Figs. 1 to 3As shown in the embodiment, the three-gear hydraulic real-time four-wheel drive agricultural machine gearbox is provided, which comprises a gearbox shell, a three-gear hydraulic transmission mechanism and a brake hub transmission mechanism 6 arranged in the gearbox shell, wherein the three-gear hydraulic transmission mechanism comprises an axle 2, a second axle 3 and a third axle 4 arranged from top to bottom, a driving gear on the axle 2 is engaged with a driven gear of the second axle 3 through a shift mechanism 5, and a second axle output gear 31 is engaged with a third axle gear 43; an inner flange plate 44 is arranged on one side of the third axle 4, and the inner flange plate 44 transmits power to a front drive axle; the brake hub transmission mechanism 6 is arranged on the other side of the third axle 4, and the brake hub transmission mechanism 6 comprises an outer flange plate 45 and a brake assembly, and the outer flange plate 45 transmits power to a rear drive axle and brakes through the brake assembly.

[0032] As shown in the embodiment, Figs. 1 to 3 The three-gear hydraulic real-time four-wheel drive agricultural machine gearbox is improved by the three-gear hydraulic transmission mechanism and the brake hub transmission mechanism 6, so that the front drive axle and the rear drive axle can be simultaneously driven for four-wheel drive, and the gearbox is suitable for agricultural vehicles in rugged and uneven, pitted and soft and not easy to walk conditions. Specifically, the overall gearbox shell is compact, the three-gear hydraulic transmission mechanism and the brake hub transmission mechanism 6 in the gearbox shell are respectively responsible for power transmission and brake control, the driving gear on the axle 2 is engaged with the driven gear of the second axle 3 through the shift mechanism 5 to form different transmission ratios, three-gear shifting is realized, the second axle output gear 31 is engaged with the third axle gear 43 to transmit power to the third axle 4, and then the power is transmitted to the front drive axle through the inner flange plate 44 to realize the front drive of the tire; the outer flange plate 45 on the other side of the third axle 4 transmits power to the rear drive axle and brakes through the brake assembly to realize the rear drive and brake of the tire; the three-gear hydraulic transmission mechanism realizes power control through a hydraulic motor, the shift mechanism 5 realizes the engagement and separation of the gears through a fork shaft and a shift fork to change the transmission ratio, and the four-wheel drive is controlled in real time according to the road conditions to improve the adaptability of the agricultural vehicle.

[0033] In addition, the three-gear hydraulic real-time four-wheel drive agricultural machine gearbox according to the above-mentioned embodiment of the present application can have the following additional technical features:

[0034] According to an embodiment of the present application, the axle 2 is sequentially provided with a first-gear driving gear, a second-gear driving gear and a third-gear driving gear 41 from right to left; the second axle 3 is sequentially provided with a first-gear tooth hub 22, a first-gear driven gear 21, a second axle output gear 31, a second-gear driven gear 32, a second and third-gear tooth hub 33 and a third-gear driven gear 42 from right to left; and the third axle 4 is provided with a third axle gear 43.

[0035] The first-gear driving gear is engaged with the first-gear driven gear 21, and the first-gear driving gear drives the first-gear driven gear 21 to rotate;

[0036] The second-gear driven gear 32 is engaged with the second-gear driven gear 32, and the second-gear driving gear drives the second-gear driven gear 32 to rotate.

[0037] The three-gear driving gear 41 is engaged with the three-gear driven gear 42, and the three-gear driving gear 41 drives the three-gear driven gear 42 to rotate.

[0038] The two-axle output gear 31 is engaged with the three-axle gear 43, and the two-axle output gear 31 drives the three-axle gear 43 to rotate, thereby transmitting power to the three-axle 4.

[0039] The technical scheme is characterized in that the one-axle 2 is provided with the one-gear to three-gear driving gear 41, the two-axle 3 is provided with the corresponding gear driven gear and gear hub, and is engaged with the three-axle gear 43, thereby realizing the power transmission path: the one-axle 2 driving gear drives the two-axle 3 driven gear to complete gear shifting, and then the power is output to the three-axle 4 through the engagement of the two-axle output gear 31 and the three-axle gear 43, thereby realizing multi-gear mechanical transmission.

[0040] According to one embodiment of the utility model, the gear shifting mechanism 5 includes a one-gear yoke shaft 51 on the right side, and a one-gear shift fork 52 below the one-gear yoke shaft 51, wherein the one-gear shift fork 52 is connected with the one-gear gear hub 22, and when the one-gear gear hub 22 is engaged with the one-gear driven gear 21, power is transmitted to the two-axle 3.

[0041] The gear shifting mechanism 5 further includes a two-three-gear yoke shaft 53 on the left side, and a two-three-gear shift fork 54 below the two-three-gear yoke shaft 53, wherein the two-three-gear shift fork 54 is connected with the two-three-gear gear hub 33, and when the two-three-gear gear hub 33 is engaged with the two-gear driven gear 32 on the right side, power is transmitted to the two-axle 3; and when the two-three-gear gear hub 33 is engaged with the three-gear driven gear 42 on the left side, power is transmitted to the two-axle 3.

[0042] The technical scheme is characterized in that the one-gear shift fork 52 and the two-three-gear shift fork 54 are respectively arranged on the one-gear yoke shaft 51 and the two-three-gear yoke shaft 53, and are linked with the corresponding gear hub, thereby realizing multi-gear shifting control of power by using the gear hub to select different gears through horizontal movement.

[0043] According to one embodiment of the utility model, the one-gear yoke shaft 51 and the two-three-gear yoke shaft 53 are both installed in the transmission case through bearings, and the one-gear shift fork 52 and the two-three-gear shift fork 54 are provided with positioning grooves, which are matched with the positioning devices in the transmission case.

[0044] The technical scheme is characterized in that the one-gear yoke shaft 51 and the two-three-gear yoke shaft 53 are installed in the transmission case through bearings, and the one-gear shift fork 52 and the two-three-gear shift fork 54 are provided with positioning grooves / holes, which are matched with the positioning devices in the transmission case, thereby realizing axial movement limiting of the yoke shaft and position fixing of the shift fork, controlling the stability of gear engagement during gear shifting, and improving the accuracy of gear positioning.

[0045] According to one embodiment of the utility model, the brake assembly comprises a brake disc, a brake caliper and a hydraulic control assembly, the brake disc is connected to the outer flange disc 45, the hydraulic control assembly applies pressure to the brake caliper, the brake caliper clamps the brake disc, and the brake of the rear drive axle is realized.

[0046] The technical scheme fixes the brake disc to the outer flange disc 45, drives the brake caliper to apply clamping force to the brake disc by the hydraulic control assembly, forms a friction braking torque, and realizes the speed reduction or parking control of the rear drive axle.

[0047] According to one embodiment of the utility model, the gearbox housing is additionally provided with a gear shifting support 7 and a fork shaft end cover 8; the gear shifting support 7 is fixed to the gearbox housing near the left side of the shaft 2, and is used for supporting the rotation of the fork shaft; the fork shaft end cover 8 is located at the end of the first fork shaft 51, and is used for preventing the leakage of lubricating oil.

[0048] The technical scheme sets the gear shifting support 7 and the fork shaft end cover 8 on the outside of the gearbox housing, realizes the double functions of fork shaft rotation support and lubricating oil leakage prevention, and improves the gear shifting operation stability of the gearbox and the reliability of the internal lubricating environment.

[0049] The use process of the above embodiment is as follows: as shown in the figure, Figs. 1 to 3 After the power input shaft 2 of the hydraulic motor, the gear shifting mechanism 5 controls the transverse movement of the fork shaft, when the shift fork drives the gear hub to mesh with the specific gear, such as the left shift of the first gear hub 22 to engage the first driven gear 21, the first driven gear 21 is engaged with the first driven gear 21, the power is transmitted to the second shaft 3 through the first shaft 2, the second shaft output gear 31 is engaged with the third shaft gear 43, the power is transmitted to the third shaft 4 through the second shaft 3, and the front axle is driven by the inner flange disc 44, the outer flange disc 45 on the other side of the third shaft 4 transmits the power to the rear axle tire, forming a four-wheel drive mode; when braking, the hydraulic control assembly pushes the brake caliper to clamp the brake disc on the outer flange disc 45, realizing the braking of the rear axle; in addition, the three-gear transmission selects different gear sets through the fork shaft linkage shift fork: the first fork shaft 51 controls the movement of the first gear hub 22, the second and third fork shaft 53 linkage second and third gear hub 33 left and right sliding, respectively engaging the second driven gear 32 or the third driven gear 42. The utility model realizes real-time four-wheel drive driving by real-time switching of driving force distribution and braking force through hydraulic and mechanical cooperative control.

Claims

1. A three-gear hydraulic real-time four-wheel drive farm machinery gearbox, characterized in that, The gearbox shell (1) is provided with a three-gear hydraulic transmission mechanism and a brake hub transmission mechanism (6) in the gearbox shell (1), wherein the three-gear hydraulic transmission mechanism comprises an axle (2), a second axle (3) and a third axle (4) arranged from top to bottom, the driving gear on the first axle (2) is engaged with the passive gear of the second axle (3) through the shift mechanism (5), and the second axle output gear (31) is engaged with the third axle gear (43); the inner flange plate (44) is arranged on one side of the third axle (4), and the inner flange plate (44) transmits power to the front drive axle; the brake hub transmission mechanism (6) is arranged on one side of the third axle (4), and the brake hub transmission mechanism (6) comprises an outer flange plate (45) and a brake assembly, and the outer flange plate (45) transmits power to the rear drive axle and brakes through the brake assembly.

2. The three-gear hydraulic real-time four-wheel drive farm machinery gearbox according to claim 1, characterized in that, The first axle (2) is sequentially provided with a one-gear driving gear, a two-gear driving gear and a three-gear driving gear (41) from right to left; the second axle (3) is sequentially provided with a one-gear tooth hub (22), a one-gear passive gear (21), a second axle output gear (31), a two-gear passive gear (32), a two-three-gear tooth hub (33) and a three-gear passive gear (42) from right to left; the third axle (4) is provided with a third axle gear (43); The one-gear driving gear is engaged with the one-gear passive gear (21), and the one-gear driving gear drives the one-gear passive gear (21) to rotate; The two-gear passive gear (32) is engaged with the two-gear passive gear (32), and the two-gear driving gear drives the two-gear passive gear (32) to rotate; The three-gear driving gear (41) is engaged with the three-gear passive gear (42), and the three-gear driving gear (41) drives the three-gear passive gear (42) to rotate; The second axle output gear (31) is engaged with the third axle gear (43), and the second axle output gear (31) drives the third axle gear (43) to rotate and transmits power to the third axle (4).

3. The three-gear hydraulic real-time four-wheel drive farm machinery gearbox according to claim 2, characterized in that, The shift mechanism (5) comprises a one-gear fork shaft (51) on the right side and a one-gear shift fork (52) below the one-gear fork shaft (51), wherein the one-gear shift fork (52) is connected with the one-gear tooth hub (22), and when the one-gear tooth hub (22) is engaged with the one-gear passive gear (21), power is transmitted to the second axle (3); The shift mechanism (5) further comprises a two-three-gear fork shaft (53) on the left side and a two-three-gear shift fork (54) below the two-three-gear fork shaft (53), wherein the two-three-gear shift fork (54) is connected with the two-three-gear tooth hub (33), and when the two-three-gear tooth hub (33) is engaged with the two-gear passive gear (32) on the right side, power is transmitted to the second axle (3); when the two-three-gear tooth hub (33) is engaged with the three-gear passive gear (42) on the left side, power is transmitted to the second axle (3).

4. The three-gear hydraulic real-time four-wheel drive farm machinery gearbox according to claim 3, characterized in that, The one-gear fork shaft (51) and the two-three-gear fork shaft (53) are both installed in the gearbox shell (1) through bearings, and the one-gear shift fork (52) and the two-three-gear shift fork (54) are provided with positioning grooves matched with the positioning devices in the gearbox shell (1).

5. The three-gear hydraulic real-time four-wheel drive farm machinery gearbox according to claim 1, characterized in that, The brake assembly comprises a brake disc, a brake caliper and a hydraulic control assembly, the brake disc is connected to the outer flange (45), the hydraulic control assembly applies pressure to the brake caliper, the brake caliper clamps the brake disc, and the brake of the rear drive axle is realized.

6. The three-gear hydraulic real-time four-wheel drive farm machinery gearbox according to claim 1, characterized in that, The gearbox shell (1) is externally provided with a gear shifting support (7) and a fork shaft end cover (8); the gear shifting support (7) is fixed on the gearbox shell (1) near the left side of a shaft (2) and is used for supporting the rotation of a fork shaft; the fork shaft end cover (8) is located at the end of a gear shifting fork shaft (51) and is used for preventing lubricating oil from leaking.

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