Closed harvester header gearbox assembly

Abstract

The utility model provides a closed harvester header gearbox assembly, and belongs to the technical field of agricultural machinery. The upper shell and the lower shell are combined to form a shell cavity, a spline shaft is arranged in the shell cavity, the input end of the spline shaft is sleeved with a flange shaft, a first shifting fork gear arranged on the flange shaft in a sleeving mode and meshed with the side wall of the flange shaft is arranged in the shell cavity, a shifting fork shaft is arranged in the shell cavity, and a shifting fork moving left and right along with the shifting fork shaft is fixed to the shifting fork shaft. A meshing sleeve meshed with the spline shaft is arranged on a shifting fork opening of the shifting fork, a first combination gear matched with the meshing sleeve is arranged on the first shifting fork gear, an intermediate shaft is arranged in the shell cavity, a first driven gear and a second driven gear are fixed to the intermediate shaft, and a second shifting fork gear is movably connected to the spline shaft in a sleeved mode. Second combination teeth are arranged on the second shifting fork gear, and outer teeth of the second shifting fork gear are meshed with outer teeth of the second driven gear. The gear shifting device has the advantages of convenience in gear shifting, simple structure, stability in use, improvement of production efficiency and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery, in particular to a closed harvester header gearbox assembly. Background Art

[0002] my country is a large agricultural country. In recent years, the combine harvester industry has been greatly developed. The production volume of various types of combine harvesters has repeatedly set new records, becoming the most dynamic and vigorous field in the agricultural machinery industry. It has been listed as a priority machinery industry encouraged by the state. At present, the gearbox shifting efficiency of the header part of wheat and eight-row corn combine harvesters is low, the structure is relatively complex, and the cost is expensive. Summary of the invention

[0003] The purpose of the utility model is to solve the above problems and provide a closed harvester header gearbox assembly, which is convenient for shifting, improves harvesting efficiency and has high reliability.

[0004] The purpose of the utility model is achieved in this way:

[0005] A closed harvester header gearbox assembly comprises an upper shell and a lower shell which are combined to form a shell cavity, a spline shaft penetrating the upper shell and the lower shell is arranged in the shell cavity, a flange shaft is sleeved on the input end of the spline shaft, a first shift fork gear sleeved on the flange shaft and meshed with the side wall of the flange shaft is arranged in the shell cavity, a shift fork shaft is arranged in the shell cavity, a shift fork which moves left and right with the shift fork shaft is fixed on the shift fork shaft, a meshing sleeve which meshes with the side wall of the spline shaft is adapted on the shift fork mouth, a first coupling tooth adapted to the meshing sleeve is arranged on the first shift fork gear, and when the shift fork moves to the right, the first shift fork gear is provided with a first coupling tooth adapted to the meshing sleeve. When the shift fork is moved, the meshing sleeve meshes with the side wall of the spline shaft and the first combining tooth at the same time; an intermediate shaft parallel to the spline shaft is arranged in the housing cavity; a first driven gear and a second driven gear meshing with the outer teeth of the first shift fork gear are axially fixed to the intermediate shaft; a second shift fork gear located on the left side of the shift fork is movably sleeved on the spline shaft, and the second shift fork gear is provided with a second combining tooth matched with the meshing sleeve; the outer teeth of the second shift fork gear mesh with the outer teeth of the second driven gear; when the shift fork moves to the left, the meshing sleeve meshes with the side wall of the spline shaft and the second combining tooth at the same time.

[0006] The utility model is further configured that a first oil seal is sleeved on a connection point where the spline shaft extends out of the lower shell, a second oil seal is arranged between the spline shaft and the flange shaft, and a third oil seal is arranged on a connection point where the flange shaft and the upper shell are connected.

[0007] The utility model is further configured such that a needle bearing is provided between the second shift fork gear and the spline shaft.

[0008] The utility model is further configured that a fourth oil seal is provided on the connection portion where the shift fork shaft extends out of the lower housing.

[0009] The utility model is further configured that a plurality of supporting bearings whose outer walls abut against the inner wall of the upper shell are sleeved on the side wall of the flange shaft.

[0010] The utility model is further configured that a mounting hole for mounting the intermediate shaft is opened on the upper shell, an end cover is sealed on the mounting hole, and a sealing ring is arranged between the end cover and the mounting hole.

[0011] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0012] The gearbox assembly provided by the utility model realizes output of three gears by moving the shift fork shaft to the left, to the right, or unchanged. It has low cost and good overall sealing performance, and greatly improves production and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0014] Figure 2 It is a partial structural schematic diagram of the utility model;

[0015] Reference numerals:

[0016] 1-upper shell; 10-shell cavity; 11-mounting hole; 12-end cover; 2-lower shell;

[0017] 3-spline shaft; 30-needle bearing; 4-flange shaft; 40-support bearing;

[0018] 5-shift fork shaft; 50-first shift fork gear; 500-first coupling tooth; 51-shift fork; 52-engaging sleeve; 53-second shift fork gear; 530-second coupling tooth;

[0019] 6-intermediate shaft; 60-first driven gear; 61-second driven gear;

[0020] 70 - first oil seal; 71 - second oil seal; 72 - third oil seal; 74 - fourth oil seal. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings. Figure 1 — Figure 2 :

[0022] A closed harvester header gearbox assembly, including an upper shell 1 and a lower shell 2 combined to form a shell cavity 10, a spline shaft 3 penetrating the upper shell 1 and the lower shell 2 is provided in the shell cavity 10, a flange shaft 4 is sleeved on the input end of the spline shaft 3, a first shift fork gear 50 sleeved on the flange shaft 4 and meshing with the side wall of the flange shaft 4 is provided in the shell cavity 10, a shift fork shaft 5 is provided in the shell cavity 10, a shift fork 51 that moves left and right with the shift fork shaft 5 is fixed on the shift fork shaft 5, a meshing sleeve 52 that meshes with the side wall of the spline shaft 3 is adapted on the shift fork opening of the shift fork 51, a first combining tooth 500 adapted to the meshing sleeve 52 is provided on the first shift fork gear 50, and when the shift fork 51 moves to the right, the meshing sleeve 52 simultaneously meshes with the spline shaft 3. The shell cavity 10 is provided with an intermediate shaft 6 parallel to the spline shaft 3, and the intermediate shaft 6 is axially fixed with a first driven gear 60 meshing with the outer teeth of the first shift fork gear 50, and the intermediate shaft 6 is axially fixed with a second driven gear 61 located on one side of the first driven gear 60. The spline shaft 3 is movably sleeved with a second shift fork gear 53 located on the left side of the shift fork, and the second shift fork gear 53 is provided with a second combining tooth 530 adapted to the meshing sleeve 52, and the outer teeth of the second shift fork gear 53 are meshed with the outer teeth of the second driven gear 61. When the shift fork 51 moves to the left, the meshing sleeve 52 meshes with the side wall of the spline shaft 3 and the second combining tooth 530 at the same time.

[0023] During the implementation process, the upper shell or the lower shell is equipped with special oil filling and draining holes and ventilation holes for lubrication of gears and shafts.

[0024] Specifically, three different output modes are realized by the three states of the fork shaft;

[0025] When the fork shaft 5 is in the middle position, the engagement sleeve 52 only engages with the side wall of the spline shaft 3, that is, the power input is directly output through the spline shaft 3, and the speed ratio is 1:1.

[0026] When the fork shaft moves to the right, the fork 51 drives the engagement sleeve 52 to move to the right, and the engagement sleeve 52 engages the side wall of the spline shaft 3 and the first coupling tooth 500. At this time, the power is input from the flange shaft 4, and the flange shaft 4 drives the first fork gear 50 and the first coupling tooth 500 to rotate in turn, and drives the output of the spline shaft 3 through the engagement sleeve 52, and the speed ratio is 1:1. It is worth mentioning that this speed ratio is different from the above speed ratio because the rotation speed of the input spline shaft 3 is different from the rotation speed of the flange shaft 4.

[0027] When the fork shaft moves to the left, the fork 51 drives the engagement sleeve 52 to move to the left, and the engagement sleeve 52 engages the side wall of the spline shaft 3 and the second coupling tooth 530. At this time, the power is input from the flange shaft 4, and the flange shaft 4 drives the first fork gear 50, the first driven gear 60, the intermediate shaft 6, the second driven gear 61, the second fork gear 53 and the second coupling tooth 530 in sequence. Because the second coupling tooth 530 and the side wall of the spline shaft 3 are all engaged through the engagement sleeve 52, the output of the spline shaft 3 is driven, and the speed ratio is about 1:1.106.

[0028] In the second case mentioned above, that is, when the shift fork moves to the right, since the second shift fork gear 53 is movably mounted on the spline shaft 3, the rotation of the flange shaft 4 drives the first shift fork gear, the first driven gear, the intermediate shaft, the second driven gear and the second shift fork gear to rotate without causing the spline shaft to rotate.

[0029] Preferably, a first oil seal 70 is sleeved at the connection where the spline shaft 3 extends out of the lower shell 2 , a second oil seal 71 is provided between the spline shaft 3 and the flange shaft 4 , and a third oil seal 72 is provided at the connection between the flange shaft 4 and the upper shell 1 .

[0030] In the above structure, since the above position is a movable position, an oil seal is provided to ensure the sealing effect of the oil.

[0031] Preferably, a needle bearing 30 is provided between the second shift fork gear 53 and the spline shaft 3 to movably connect the second shift fork gear 53 and the spline shaft 3 .

[0032] Preferably, a fourth oil seal 74 is provided at the connection point where the fork shaft 5 extends out of the lower housing 2 to prevent oil leakage from occurring at the fork shaft 5 .

[0033] Preferably, the side wall of the flange shaft 4 is sleeved with a plurality of support bearings 40 whose outer wall abuts against the inner wall of the upper shell 1, so that the flange shaft is more stable when rotating and is not prone to axial shaking.

[0034] Preferably, the upper housing 1 is provided with a mounting hole 11 for mounting the intermediate shaft 6, the mounting hole 11 is sealed with an end cover 12, and a sealing ring is provided between the end cover 12 and the mounting hole 11, so as to facilitate installation, maintenance, oiling and other operations.

[0035] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A closed harvester header gearbox assembly, characterized in that: The invention comprises an upper shell (1) and a lower shell (2) which are combined to form a shell cavity (10); a spline shaft (3) penetrating the upper shell (1) and the lower shell (2) is provided in the shell cavity (10); a flange shaft (4) is sleeved on the input end of the spline shaft (3); a first shift fork gear (50) sleeved on the flange shaft (4) and meshing with the side wall of the flange shaft (4) is provided in the shell cavity (10); a shift fork shaft (5) is provided in the shell cavity (10); a shift fork (51) which moves left and right with the shift fork shaft (5) is fixed on the shift fork shaft (5); a meshing sleeve (52) which meshes with the side wall of the spline shaft (3) is adapted on the shift fork opening of the shift fork (51); a first coupling tooth (500) adapted to the meshing sleeve (52) is provided on the first shift fork gear (50); when the shift fork (51) moves to the right, the meshing sleeve (52) simultaneously meshes with the spline shaft (3) ) side wall and the first combining tooth (500), an intermediate shaft (6) parallel to the spline shaft (3) is arranged in the shell cavity (10), a first driven gear (60) meshing with the outer teeth of the first shift fork gear (50) is axially fixed to the intermediate shaft (6), a second driven gear (61) located on one side of the first driven gear (60) is axially fixed to the intermediate shaft (6), a second shift fork gear (53) located on the left side of the shift fork is movably sleeved on the spline shaft (3), and the second shift fork gear (53) is provided with a second combining tooth (530) adapted to the meshing sleeve (52), the outer teeth of the second shift fork gear (53) mesh with the outer teeth of the second driven gear (61), and when the shift fork (51) moves to the left, the meshing sleeve (52) simultaneously meshes with the side wall of the spline shaft (3) and the second combining tooth (530).

2. The enclosed harvester header gearbox assembly according to claim 1, characterized in that: A first oil seal (70) is sleeved on the connection point where the spline shaft (3) protrudes from the lower shell (2), a second oil seal (71) is arranged between the spline shaft (3) and the flange shaft (4), and a third oil seal (72) is arranged on the connection point between the flange shaft (4) and the upper shell (1).

3. The closed harvester header gearbox assembly according to claim 1, characterized in that: A needle roller bearing (30) is provided between the second shift fork gear (53) and the spline shaft (3).

4. The enclosed harvester header gearbox assembly according to claim 1, characterized in that: A fourth oil seal (74) is provided at the connection point where the shift fork shaft (5) protrudes from the lower housing (2).

5. The enclosed harvester header gearbox assembly according to claim 1, characterized in that: A plurality of supporting bearings (40) are sleeved on the side wall of the flange shaft (4) and the outer wall of the bearings abuts against the inner wall of the upper shell (1).

6. The enclosed harvester header gearbox assembly according to claim 1, characterized in that: The upper housing (1) is provided with a mounting hole (11) for mounting the intermediate shaft (6); an end cover (12) is sealed on the mounting hole (11); and a sealing ring is provided between the end cover (12) and the mounting hole (11).

Images