Coupling shaft for corn harvester for adjusting power output mode

Abstract

The present invention relates to a connecting shaft for a corn harvester capable of adjusting the power output mode. The connecting shafts are arranged in pairs, and a plurality of blades are provided on the circular axial surface of the connecting shafts, with the blades arranged in a circular array around the axis of the connecting shaft. A hydraulic booster device is coaxially provided on the connecting shaft, and the hydraulic booster device is sleeved on the blades. A liquid inlet pipe and a liquid outlet pipe are respectively connected to opposite sides of the axis of the rotating chamber. The liquid inlet pipe and the liquid outlet pipe are connected to the hydraulic pipeline of the hydraulic station. The power output of the corn harvester of the present invention can be arbitrarily distributed and adjusted, and the output mode of the corn harvester can be arbitrarily changed, thereby improving the corn harvester's ability to escape from difficulties.

Description

Technical Field

[0001] The invention belongs to the field of agricultural machinery transmission shafts, and in particular relates to a connecting shaft for a corn harvester for adjusting a power output mode. Background Art

[0002] The chassis drive axles of existing corn harvesters are mostly two-wheel drive or four-wheel drive. Since corn harvesters are heavy and often work in fields with muddy and loose soil, the tires of corn harvesters are easily sunk into the soil during operation.

[0003] At the same time, since the power output of the existing corn harvester cannot be arbitrarily adjusted and the output wheel cannot be changed, the corn harvester has a very poor ability to escape from trouble and often needs a trailer to be towed out. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing technology and provide a connecting shaft for a corn harvester with an adjustable power output mode. The power output of the corn harvester of the present invention can be arbitrarily distributed and adjusted, and the output mode of the corn harvester can be arbitrarily changed, thereby improving the corn harvester's ability to escape from difficulties.

[0005] The technical solution adopted by the present invention to solve the problems existing in the prior art is:

[0006] A connecting shaft for a corn harvester for adjusting a power output mode comprises a coaxially arranged half shaft and an intermediate shaft.

[0007] The half-shaft includes a front half-shaft and a half-shaft end gear sleeve, the blades are fixed on the circular axis surface of the front half-shaft, the hydraulic power assist device is sleeved on the front half-shaft, and teeth are provided on the outer circular axis surface of the half-shaft end gear sleeve. The half-shaft end gear sleeve is fixedly connected to the front half-shaft through a connecting device.

[0008] A gear is coaxially fixed to one end of the intermediate shaft facing the half shaft, and the number of teeth of the gear is the same as the number of teeth of the gear sleeve at the half shaft end.

[0009] The gear and the half-shaft end gear sleeve are both provided with a meshing device, the axial length of the meshing device is smaller than the axial length of the gear, and the meshing device slides along its axial direction.

[0010] The outer sleeve of the meshing device is provided with a swivel, the swivel is fixedly connected to the end of the telescopic rod of the hydraulic cylinder, the hydraulic cylinder is fixedly connected to the bridge housing, and the hydraulic cylinder is connected to the hydraulic station through a pipeline.

[0011] The end of the front half shaft facing the half shaft end gear sleeve is provided with a first connecting flange.

[0012] The end surface of the half-shaft end gear sleeve facing the front half-shaft is concave with an annular slot.

[0013] The connecting device includes a second connecting flange and an insert ring that are coaxially fixedly connected. The insert ring is inserted into the slot, and the second connecting flange is coaxially abutted against the first connecting flange.

[0014] The insert ring and the half-shaft end gear sleeve as well as the second connecting flange and the first connecting flange are fixedly connected by bolts.

[0015] The meshing device comprises an inner gear sleeve, a ball and a retaining ring, and teeth are arranged on the inner circular shaft surface of the inner gear sleeve.

[0016] The inner gear sleeve is meshed with the half-shaft end gear sleeve and the gear.

[0017] A first groove is concave on the end surface of the inner gear sleeve facing the half-shaft end gear sleeve, and a retaining ring is coaxially provided on the side of the inner gear sleeve facing the half-shaft end gear sleeve, and a second groove is concave on the end surface of the retaining ring facing the inner gear sleeve. The retaining ring is fixedly connected to the inner gear sleeve by bolts.

[0018] The first groove corresponds to the second groove one by one, and the first groove and the second groove are combined to form a cavity with a cross-sectional arc greater than °. The ball is rotatably arranged inside the cavity, and the volume of the ball leaking to the outside of the cavity is less than half of the total volume of the ball. The ball is rotatably arranged between two adjacent teeth of the half-shaft end gear sleeve.

[0019] Preferably, a plurality of blades are provided on the circular axial surface of the front half shaft, and the blades are distributed in a circular array around the axis of the front half shaft.

[0020] A hydraulic booster is coaxially provided on the front half-shaft, and the hydraulic booster is fixedly connected to the bridge housing. The hydraulic booster includes an upper end shell and a lower end shell. Both the upper end shell and the lower end shell are semicircular. The upper end shell and the lower end shell are arranged relative to each other with the connecting shaft sleeve in the middle.

[0021] A rotating chamber is provided in the middle of the hydraulic booster device, and the blades are arranged inside the rotating chamber, and the ends and side walls of the blades abut against the inner wall of the rotating chamber.

[0022] The end surfaces on both sides of the rotating cavity are provided with first clamping grooves, the interior of the first clamping grooves is provided with oil sealing rings, and the oil sealing rings are sleeved on the connecting shaft.

[0023] The two opposite sides of the rotating chamber axis are connected with a liquid inlet pipe and a liquid outlet pipe respectively, and the liquid inlet pipe and the liquid outlet pipe are connected with the hydraulic pipeline of the hydraulic station.

[0024] Preferably, a leakage cavity is provided on both sides of the rotating cavity, and a first groove is provided on the inner side of the partition between the leakage cavity and the rotating cavity and on the end surface of the leakage cavity facing away from the rotating cavity. An oil seal ring is provided inside the first groove, and the oil seal ring is sleeved on the connecting shaft.

[0025] A leakage tube is connected to the lower part of the leakage cavity. Both leakage tubes are connected to a detection box. A conductivity probe is provided inside the detection box. The conductivity probe is electrically connected to the control device of the hydraulic station.

[0026] Preferably, two limiting rings are provided inside the hydraulic cylinder, a piston is fixed to the end of the telescopic rod inside the hydraulic cylinder, and the piston is slidably arranged between the two limiting rings.

[0027] The two cavities of the hydraulic cylinder located at the end of the limit ring away from the piston are respectively connected to the front hydraulic pipe and the rear hydraulic pipe, and the front hydraulic pipe and the rear hydraulic pipe are respectively connected to the pipeline of the hydraulic station.

[0028] Preferably, a support shaft is coaxially fixed to one end of the gear sleeve facing the half-shaft end, the support shaft is inserted into the interior of the half-shaft end gear sleeve, and a second annular groove is recessed at the end of the circumferential surface of the support shaft, a combined retaining ring is clamped inside the second groove, and the half-shaft end gear sleeve is clamped between the combined retaining ring and the gear.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) Output power can be provided to each tire individually, or to a combination of several tires at the same time, thereby improving the corn harvester's ability to escape and pass.

[0031] (2) The hydraulic resistance device can increase the power compensation for the designated tire, further improving the ability to escape and pass. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings and examples.

[0033] Figure 1 This is an outline diagram of a connecting shaft for a corn harvester with a power output adjustment method according to the present invention.

[0034] Figure 2 This is an exploded view of the connecting shaft for a corn harvester with adjustable power output mode according to the present invention.

[0035] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0036] Figure 4 for Figure 2 The first cross-sectional view of

[0037] Figure 5 for Figure 2 The second cross-sectional view of

[0038] Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0039] Figure 7 for Figure 5 A partial enlarged view of point C in the middle.

[0040] Figure 8 This is a schematic diagram of the connection between the half-shaft gear end and the intermediate shaft of the connecting shaft for a corn harvester with adjustable power output mode according to the present invention.

[0041] Figure 9 This is a structural diagram of the meshing device in the connecting shaft of a corn harvester for adjusting the power output mode of the present invention.

[0042] Figure 10 for Figure 9 A cross-sectional view of

[0043] Figure 11 This is a cross-sectional view of a half-shaft of a connecting shaft for a corn harvester that adjusts the power output mode of the present invention.

[0044] Figure 12 This is a structural diagram of the multi-drive system assembly of the present invention.

[0045] Figure 13 This is the outline diagram of the drive axle in the multi-drive system of the present invention.

[0046] Figure 14 This is the first cross-sectional view through the drive axle in the multi-drive system of the present invention.

[0047] Figure 15 This is a second cross-sectional view of the multi-drive system of the present invention, which passes through the drive axle.

[0048] Figure 16 This is the internal structure diagram of the travel gearbox assembly in the multi-drive system of the present invention.

[0049] In the figure: 01-through drive axle, 02-travel gearbox assembly, 03-hydraulic motor, 04-rear drive axle assembly, 05-front drive axle assembly, 06-universal joint drive shaft assembly;

[0050] 1-main drive shaft, 101-travel gearbox connecting plate, 102-front drive axle connecting plate, 2-drive driving gear, 3-drive passive gear, 4-intermediate bevel gear shaft, 5-differential, 501-differential large bevel gear;

[0051] 6-half shaft, 601-front half shaft, 6011-first connecting flange, 6012-blade, 602-hydraulic booster, 6021 upper end shell, 6022-lower end shell, 6023-rotating chamber, 6024-leakage chamber, 6025-liquid inlet pipe, 6026-liquid discharge pipe, 6027-detection box, 60271-leakage pipe, 60272-conductivity probe, 6028-first slot, 603-oil seal ring, 604-half shaft end gear sleeve , 6041-slot, 605-connecting device, 6051-second connecting flange, 6052-insert ring, 606-engaging device, 6061-inner gear sleeve, 6062-first groove, 6063-ball, 6064-retaining ring, 60641-second groove, 607-swivel, 608-hydraulic cylinder, 6081-front hydraulic pipe, 6082-rear hydraulic pipe, 6083-telescopic rod, 6084-piston, 6085-limiting ring;

[0052] 7-intermediate shaft, 701-gear, 702-support shaft, 7021-second groove, 703-combined snap ring, 8-brake assembly, 9-axle housing;

[0053] 10-gearbox housing, 11-input shaft, 12-spline sleeve, 13-high-speed driving gear, 14-low-speed driving gear, 15-intermediate shaft, 16-high-speed passive gear, 17-low-speed passive gear, 18-output shaft, 1801-front output flange, 1802-rear output flange, 19-output gear, 20-high and low-speed fork shaft, 21-high and low-speed shift fork, 22-high and low-speed gear hub sleeve, 23-self-locking steel ball, 24-self-locking spring, 25-hand brake assembly, 26-tapered roller bearing. DETAILED DESCRIPTION

[0054] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0055] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are merely used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed or operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0056] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0057] The connecting shaft for a corn harvester with adjustable power output mode of the present invention will be further described in detail below with reference to the accompanying drawings, but this is not intended to limit the present invention.

[0058] In Example 1, the corn harvester's travel power adopts pure hydraulic power:

[0059] The corn harvester's multi-drive system includes a hydraulic station, an even number of connecting shafts, a brake assembly 8, and an axle housing 9. The number of connecting shafts is four or more. The connecting shafts are rotatably mounted within the axle housing 9, which is fixedly connected to the vehicle frame. One end of the connecting shaft extends outside the axle housing 9 and connects to the brake assembly 8. The connection between the connecting shafts and the brake assembly 8 is conventional, and the connecting shafts drive the tires in rotation.

[0060] The connecting shafts are arranged in pairs, and a plurality of blades 6012 are provided on the circular surface of the connecting shaft. The blades 6012 are distributed in a circular array around the axis of the connecting shaft. The blades 6012 are arc-shaped blades, so that the driving force is stronger during the hydraulic oil pushing process.

[0061] A hydraulic booster 602 is coaxially mounted on the connecting shaft and fixedly connected to the axle housing 9. The hydraulic booster 602 comprises an upper housing 6021 and a lower housing 6022. Both upper and lower housings are semicircular and arranged opposite each other, with the connecting shaft sleeve positioned between them. A sealing gasket or sealant is applied to the contact surfaces of the upper and lower housings 6021 and 6022, and the two are securely connected by bolts.

[0062] A rotating chamber 6023 is provided in the middle of the hydraulic booster 602 , and the blade 6012 is provided inside the rotating chamber 6023 . The end and side wall of the blade 6012 abut against the inner wall of the rotating chamber 6023 .

[0063] A first groove 6028 is provided on the end faces on both sides of the axial direction of the rotating chamber 6023, and an oil seal ring 603 is provided inside the first groove 6028. The oil seal ring 603 is sleeved on the connecting shaft. The oil seal ring 603 is located between the upper end shell 6021, the lower end shell 6022 and the connecting shaft, so that the hydraulic oil inside the rotating chamber 6023 will not leak.

[0064] A liquid inlet pipe 6025 and a liquid outlet pipe 6026 are connected to opposite sides of the rotating chamber 6023. These two pipes are connected to the hydraulic piping of the hydraulic station. The inlet pipe 6025 is connected to the upper shell 6021, while the outlet pipe 6026 is connected to the lower shell 6022. To reduce the pressure on the oil, the opening area of the outlet pipe 6026 is larger than that of the inlet pipe 6025.

[0065] A leakage chamber 6024 is provided on both sides of the rotating chamber 6023. A first groove 6028 is provided on the inner side of the partition between the leakage chamber 6024 and the rotating chamber 6023 and on the end surface of the leakage chamber 6024 facing away from the rotating chamber 6023. An oil seal ring 603 is provided inside the first groove 6028, and the oil seal ring 6023 is sleeved on the connecting shaft.

[0066] Each leakage chamber 6024 is connected to a leakage tube 60271 extending from its exterior and below. Both leakage tubes 60271 are connected to a detection box 6027. Inside the detection box 6027 is a conductivity probe 60272, electrically connected to the hydraulic station's control unit. The detection box 6027 is funnel-shaped or trapezoidal, with a larger top and smaller bottom. The detection end of the conductivity probe 60272 is located at the lowest point of the detection box 6027. This facilitates the collection of leaked hydraulic oil. The conductivity probe 60272 can detect the presence of hydraulic oil inside the detection box 6027 to determine the sealing condition of the oil seal ring 603.

[0067] The hydraulic station utilizes existing technology, with the same number of hydraulic pumps as the number of hydraulic boosters 602, and a one-to-one correspondence. Hydraulic oil alone propels the blades 6012 to rotate, which in turn drives the wheels, providing power for the corn harvester. Driving force for the corn harvester can be distributed by turning on the corresponding hydraulic pumps.

[0068] Example 2: The corn harvester's traveling power is provided by an oil engine, and a hydraulic power assist device provides auxiliary power for traveling:

[0069] The multi-drive system of the corn harvester includes a travel gearbox assembly 02, several through-drive axles 01, a rear drive axle assembly 04, and a front drive axle assembly 05.

[0070] The output shaft 18 of the travel gearbox assembly 02 is provided with a front output flange 1801 and a rear output flange 1802 at both axial ends thereof.

[0071] The rear output flange 1802 is connected to the power input shaft of the rear drive axle assembly 04, and the front output flange 1801 is connected to the through drive axle 01.

[0072] The two ends of the main transmission shaft 1 passing through the drive axle 01 are respectively provided with a traveling gearbox connecting plate 101 and a front drive axle connecting plate 102. The traveling gearbox connecting plate 101 is connected to the front output flange 1801, and the front drive axle connecting plate 102 is connected to the power input shaft of the front drive axle assembly 05.

[0073] The input shaft 11 of the travel gearbox assembly 02 is connected to the power output shaft of the hydraulic motor 03.

[0074] A spline sleeve 12 is provided between the input shaft 11 of the travel gearbox assembly 02 and the power output shaft of the hydraulic motor 03. The spline sleeve 12, the input shaft 11 and the power output shaft of the hydraulic motor 03 are coaxially arranged and connected by the spline sleeve 12, which has a simple structure and is easy to assemble.

[0075] The rear output flange 1802 and the power input shaft of the rear drive axle assembly 04, the travel gearbox connecting plate 101 and the front output flange 1801, and the front drive axle connecting plate 102 and the power input shaft of the front drive axle assembly 05 are all connected through the universal joint shaft assembly 06.

[0076] The through-drive axle 01 includes a bridge housing 9, a differential 5, a connecting shaft and a brake assembly 8. The connecting shaft is connected to both sides of the differential 5 respectively. The differential 5 and the connecting shaft are both arranged inside the bridge housing 9. A brake assembly 8 is provided at each end of the connecting shaft.

[0077] A main transmission shaft 1 is passed through the interior of the bridge housing 9 , and the axis of the main transmission shaft 1 is arranged perpendicular to the axis of the connecting shaft.

[0078] A traveling gearbox connecting plate 101 and a front drive axle connecting plate 102 are respectively provided at both ends of the main transmission shaft 1. The traveling gearbox connecting plate 101 is connected to the front output flange 1801 of the traveling gearbox assembly 02, and the front drive axle connecting plate 102 is connected to the power input shaft of the front drive axle assembly 05.

[0079] The power of the travel gearbox assembly 02 is transmitted to the front drive axle assembly 05 through the travel gearbox connecting plate 101, the main transmission shaft 1 and the front drive axle connecting plate 102, thereby realizing the through-drive effect of the through-drive axle.

[0080] The travel gearbox connecting plate 101 and the front drive axle connecting plate 102 are both arranged outside the axle housing 9. The travel gearbox connecting plate 101 and the front drive axle connecting plate 102 are connected to the main transmission shaft 1 by bolts or keys. A rotating bearing is provided at the contact point between the end of the main transmission shaft 1 and the axle housing 9.

[0081] A driving gear 2 is provided on the main transmission shaft 1 . The driving gear 2 is coaxially arranged with the main transmission shaft 1 . The driving gear 2 is meshedly connected with a driven gear 3 .

[0082] The driving gear 2 is sleeved on the main transmission shaft 1, and the driving gear 2 is fixedly connected to the main transmission shaft 1 through a key; or the driving gear 2 and the main transmission shaft 1 are coaxially formed as one piece.

[0083] The driven gear 3 is connected to the intermediate bevel gear shaft 4, driving the intermediate bevel gear shaft 4 to rotate. The driven gear 3 and the intermediate bevel gear shaft 4 are arranged coaxially. The driven gear 3 and the intermediate bevel gear shaft 4 are integrally formed; or the driven gear 3 is connected to the intermediate bevel gear shaft 4 by plugging.

[0084] The intermediate bevel gear shaft 4 is meshedly connected to the large bevel gear 501 of the differential 5 .

[0085] The power transmission of the main drive shaft 1 includes two paths. One is: the power is transmitted to the differential 5 through the driving driving gear 2, the driving driven gear 3 and the intermediate bevel gear shaft 4, and the differential 5 then transmits the power to the connecting shaft; the other is: the main drive shaft 1 directly transmits the power to the front drive axle connecting plate 102, and then transmits it to the front drive axle assembly 05.

[0086] The traveling gearbox assembly 02 includes a gearbox housing 10, inside of which are provided an input shaft 11, an intermediate shaft 15, an output shaft 18 and a high and low gear fork shaft 20. The axes of the input shaft 11, the intermediate shaft 15, the output shaft 18 and the high and low gear fork shaft 20 are arranged parallel to each other.

[0087] The input shaft 11 is connected to the power output shaft of the hydraulic motor 03 through the spline sleeve 12, so that the travel gearbox assembly 02 becomes a high- and low-speed travel gearbox for a single-motor "HST" hydraulic device, realizing a hydraulic-mechanical combined travel drive and one-lever shifting, which improves travel efficiency, has reliable performance, low fuel consumption, and high cost performance.

[0088] A high-speed driving gear 13 and a low-speed driving gear 14 are coaxially provided on the input shaft 11, and a high-speed passive gear 16 and a low-speed passive gear 17 are coaxially provided on the intermediate shaft 15. The high-speed driving gear 13 is cooperatively connected with the high-speed passive gear 16, and the low-speed driving gear 14 is cooperatively connected with the low-speed passive gear 17.

[0089] This arrangement has only two speed gears, high and low, which can effectively reduce processing costs while effectively improving operation and transmission efficiency.

[0090] An output gear 19 is coaxially provided on the output shaft 18 , and the output gear 19 is connected to the high-speed driven gear 16 or the low-speed driven gear 17 , and the output gear 19 and the high-speed driven gear 16 or the low-speed driven gear 17 are in a constant meshing state.

[0091] Both ends of the output shaft 18 are passed through the outside of the transmission housing 10 , and a front output flange 1801 and a rear output flange 1802 are fixed to both ends of the output shaft 18 respectively.

[0092] A high and low gear shift fork 21 is slidably provided on the high and low gear fork shaft 20 . The high and low gear shift fork 21 is connected to a high and low gear hub 22 . The high and low gear hub 22 is connected to the input shaft 11 .

[0093] The high-speed driving gear 13, the low-speed driving gear 14, the high-speed passive gear 16, the low-speed passive gear 17 and the output gear 19 are all involute cylindrical helical gears, which have low transmission noise and large load-bearing capacity.

[0094] The high- and low-speed shift fork 21 has a spring chamber within it, housing a self-locking spring 24 and a self-locking steel ball 23. The self-locking steel ball 23 is positioned between the self-locking spring 24 and the input shaft 11. An annular groove is provided on the circular surface of the input shaft 11. Driven by the self-locking spring 24, the self-locking steel ball 23 is partially positioned within the groove on the input shaft 11. The self-locking spring 24 and the self-locking steel ball 23 form a self-locking mechanism. This mechanism allows the high- and low-speed shift fork 21 to shift gears without sliding the high- and low-speed fork shaft 20, thus optimizing the housing structure.

[0095] The intersections of the input shaft 11, the intermediate shaft 15, the output shaft 18 and the gearbox housing 10 are sleeved with tapered roller bearings 26. The tapered roller bearings 26 can better bear axial and radial forces and have more reliable performance.

[0096] The output shaft 18 located outside the transmission housing 10 is connected to the hand brake assembly 25. In this embodiment, the hand brake assembly 25 is arranged on one side of the front output flange 1801. The hand brake assembly 25 adopts a hub brake assembly for automobiles, which has a simple structure, is an existing technology, is easy to purchase, and has a good hand brake effect.

[0097] The connecting shaft includes a half shaft 6 and an intermediate shaft 7 which are coaxially arranged.

[0098] The half-shaft 6 includes a front half-shaft 601 and a half-shaft end gear sleeve 604, the blade 6012 is fixed on the circular axis surface of the front half-shaft 601, the hydraulic power assist device 602 is sleeved on the front half-shaft 601, and the outer circular axis surface of the half-shaft end gear sleeve 604 is provided with teeth, and the half-shaft end gear sleeve 604 is fixedly connected to the front half-shaft 601 through a connecting device 605.

[0099] A gear 701 is coaxially fixed to one end of the intermediate shaft 7 facing the half shaft 6 , and the number of teeth of the gear 701 is the same as the number of teeth of the gear sleeve 604 at the half shaft end.

[0100] Gear 701 and the axle-end gear sleeve 604 are both mounted with a meshing device 606. The axial length of meshing device 606 is shorter than that of gear 701, and meshing device 606 slides along its axial direction. When meshing device 606 is completely slid onto gear 701, gear 701 cannot drive axle-end gear sleeve 604 to rotate. When meshing device 606 is partially slid onto axle-end gear sleeve 604, gear 701 drives axle-end gear sleeve 604 to rotate.

[0101] The meshing device 606 includes an inner gear sleeve 6061 , a ball 6063 and a retaining ring 6064 . The inner circular axis surface of the inner gear sleeve 6061 is provided with teeth.

[0102] The inner gear sleeve 6061 is meshedly connected with the half-shaft end gear sleeve 604 and the gear 701 .

[0103] A first groove 6062 is concave on the end surface of the inner gear sleeve 6061 facing the half-shaft end gear sleeve 604, and a retaining ring 6064 is coaxially provided on the side of the inner gear sleeve 6061 facing the half-shaft end gear sleeve 604. A second groove 60641 is concave on the end surface of the retaining ring 6064 facing the inner gear sleeve 6061, and the retaining ring 6064 is fixed to the inner gear sleeve 6061 by bolts.

[0104] The first groove 6062 corresponds to the second groove 60641 one by one. The first groove 6062 and the second groove 60641 are combined to form a cavity with a cross-sectional arc greater than 180°. The ball 6063 is rotatably set inside the cavity. The volume of the ball 6063 leaking to the outside of the cavity is less than half of the total volume of the ball 6063. The ball 6063 is rotatably set between two adjacent teeth of the half-shaft end gear sleeve 604.

[0105] The retaining ring 6064 is fixedly connected to the inner gear sleeve 6061 by bolts, which makes it easy to remove the retaining ring 6064 and install and replace the internal ball bearing 6063.

[0106] When the meshing device 606 moves toward the half-shaft end gear sleeve 604, the ball 6063 contacts the teeth on the half-shaft end gear sleeve 604 before the ball 6063 can rotate. Therefore, the meshing device 606 and the half-shaft end gear sleeve 604 will not collide head-on. The impact force between the two is resolved by the rotating ball 6063, so that the ball 6063 moves to between two adjacent teeth of the half-shaft end gear sleeve 604, completing the alignment of the teeth between the half-shaft end gear sleeve 604 and the inner gear sleeve 6061. The inner teeth of the inner gear sleeve 6061 will be directly inserted into the outer tooth gap of the half-shaft end gear sleeve 604, and the two will not collide.

[0107] The outer circumferential surface of the inner gear housing 6061 of the meshing device 606 is provided with a groove, within which a swivel 607 is mounted, which is rotatably connected to the meshing device 606. The swivel 607 is fixedly connected to the end of the telescopic rod 6083 of the hydraulic cylinder 608, which is fixedly connected to the axle housing 9. The hydraulic cylinder 608 is connected to the hydraulic station via a pipeline.

[0108] Two limiting rings 6085 are provided inside the hydraulic cylinder 608 , and a piston 6084 is fixed to the end of the telescopic rod 6083 inside the hydraulic cylinder 608 , and the piston 6084 is slidably disposed between the two limiting rings 6085 .

[0109] The two cavities of the hydraulic cylinder 608 located at the end of the limit ring 6085 away from the piston 6084 are respectively connected to the front hydraulic pipe 6081 and the rear hydraulic pipe 6082, and the front hydraulic pipe 6081 and the rear hydraulic pipe 6082 are respectively connected to the pipelines of the hydraulic station.

[0110] A first connecting flange 6011 is provided at one end of the front half shaft 601 facing the half shaft end gear sleeve 604 , and an annular slot 6041 is recessed in the end surface of the half shaft end gear sleeve 604 facing the front half shaft 601 .

[0111] The connecting device 605 includes a second connecting flange 6051 and an insert ring 6052 that are coaxially fixedly connected. The insert ring 6052 is inserted into the slot 6041. The second connecting flange 6051 is coaxially abutted against the first connecting flange 6011.

[0112] The insert ring 6052 and the half-shaft end gear sleeve 604 as well as the second connecting flange 6051 and the first connecting flange 6011 are fixedly connected by bolts.

[0113] The gear 701 is coaxially fixed with a support shaft 702 at one end facing the half-shaft end gear sleeve 604. The support shaft 702 is inserted into the interior of the half-shaft end gear sleeve 604. The end of the circumferential surface of the support shaft 702 is concave with an annular second groove 7021. A combined retaining ring 703 is clamped inside the second groove 7021. The half-shaft end gear sleeve 604 is clamped between the combined retaining ring 703 and the gear 701. This prevents the half-shaft end gear sleeve 604 from axial movement during the movement of the meshing device 606.

[0114] In this embodiment, the corn harvester's engine is used as the power source. A hydraulic station controls the movement of individual hydraulic cylinders 608, thereby opening and closing the corresponding half-shafts 6 and intermediate shafts 7, thereby adjusting the engine's power distribution. When a half-shaft 6 is separated from the intermediate shaft 7, power is no longer distributed to that half-shaft 6, enabling the corn harvester to switch drive modes, such as front-wheel drive, rear-wheel drive, simultaneous drive, or power distribution to selected wheels only.

[0115] At the same time, the hydraulic station can also drive the hydraulic power assist device 602 on the corresponding half-shaft 6 through the hydraulic oil to increase the driving force on the corresponding half-shaft 6.

[0116] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A connecting shaft for a corn harvester with adjustable power output, characterized by: It includes coaxially arranged half shafts (6) and an intermediate shaft (7), The half shaft (6) includes a front half shaft (601) and a half shaft end gear sleeve (604), a blade (6012) is fixed on the circular axis surface of the front half shaft (601), a hydraulic booster device (602) is sleeved on the front half shaft (601), and teeth are provided on the outer circular axis surface of the half shaft end gear sleeve (604), and the half shaft end gear sleeve (604) is fixedly connected to the front half shaft (601) through a connecting device (605). A gear (701) is coaxially fixed to one end of the intermediate shaft (7) facing the half shaft (6). The number of teeth of the gear (701) is the same as the number of teeth of the gear sleeve (604) at the half shaft end. The gear (701) and the half-shaft end gear sleeve (604) are both provided with a meshing device (606). The axial length of the meshing device (606) is less than the axial length of the gear (701). The meshing device (606) slides along its axial direction. The outer sleeve of the meshing device (606) is provided with a swivel (607), the swivel (607) is fixedly connected to the end of the telescopic rod (6083) of the hydraulic cylinder (608), the hydraulic cylinder (608) is fixedly connected to the bridge housing (9), and the hydraulic cylinder (608) is connected to the hydraulic station through a pipeline. The front half shaft (601) is provided with a first connecting flange (6011) at one end thereof facing the half shaft end gear sleeve (604). The end surface of the half-shaft end gear sleeve (604) facing the front half-shaft (601) is concave with an annular slot (6041). The connecting device (605) comprises a second connecting flange (6051) and an insert ring (6052) that are coaxially fixedly connected. The insert ring (6052) is inserted into the slot (6041). The second connecting flange (6051) is coaxially abutted against the first connecting flange (6011). The insert ring (6052) and the half-shaft end gear sleeve (604) as well as the second connecting flange (6051) and the first connecting flange (6011) are fixedly connected by bolts. The meshing device (606) includes an inner gear sleeve (6061), a ball (6063) and a retaining ring (6064). The inner circular shaft surface of the inner gear sleeve (6061) is provided with teeth. The inner gear sleeve (6061) is meshed with the half-shaft end gear sleeve (604) and the gear (701). A first groove (6062) is concave on the end surface of the inner gear sleeve (6061) facing the half-shaft end gear sleeve (604), a retaining ring (6064) is coaxially provided on the side of the inner gear sleeve (6061) facing the half-shaft end gear sleeve (604), and a second groove (60641) is concave on the end surface of the retaining ring (6064) facing the inner gear sleeve (6061). The retaining ring (6064) and the inner gear sleeve (6061) are fixedly connected by bolts. The first groove (6062) corresponds to the second groove (60641) one by one. The first groove (6062) and the second groove (60641) are combined to form a cavity with a cross-sectional arc greater than 180 degrees. The ball (6063) is rotatably arranged inside the cavity. The volume of the ball (6063) leaking to the outside of the cavity is less than half of the total volume of the ball (6063). The ball (6063) is rotatably arranged between two adjacent teeth of the half-shaft end gear sleeve (604).

2. The connecting shaft for a corn harvester with adjustable power output according to claim 1, characterized in that: A plurality of blades (6012) are provided on the circular axis surface of the front half shaft (601). A hydraulic booster (602) is coaxially provided on the front half shaft (601), and the hydraulic booster (602) is fixedly connected to the bridge housing (9). The hydraulic booster (602) includes an upper end housing (6021) and a lower end housing (6022), and the upper end housing (6021) and the lower end housing (6022) are both semicircular. The upper end housing (6021) and the lower end housing (6022) are arranged relative to each other, and the connecting shaft sleeve is arranged in the middle. A rotating chamber (6023) is provided in the middle of the hydraulic booster device (602), and a blade (6012) is provided inside the rotating chamber (6023). The end and side wall of the blade (6012) abut against the inner wall of the rotating chamber (6023). The end surfaces on both axial sides of the rotating cavity (6023) are provided with first clamping grooves (6028), and an oil seal ring (603) is provided inside the first clamping groove (6028). The oil seal ring (603) is sleeved on the connecting shaft. A liquid inlet pipe (6025) and a liquid discharge pipe (6026) are respectively connected to opposite sides of the axis of the rotating chamber (6023), and the liquid inlet pipe (6025) and the liquid discharge pipe (6026) are connected to the hydraulic pipeline of the hydraulic station.

3. The connecting shaft for a corn harvester with adjustable power output according to claim 2, characterized in that: The blades (6012) are distributed in a circular array around the axis of the front half shaft (601).

4. The connecting shaft for a corn harvester with adjustable power output according to claim 3, characterized in that: A liquid leakage cavity (6024) is provided on each side of the rotating cavity (6023). A first clamping groove (6028) is provided on the inner side of the partition between the liquid leakage cavity (6024) and the rotating cavity (6023) and on the end surface of the liquid leakage cavity (6024) facing away from the rotating cavity (6023). An oil seal ring (603) is provided inside the first clamping groove (6028). The oil seal ring (603) is sleeved on the connecting shaft.

5. The connecting shaft for a corn harvester with adjustable power output according to claim 4, characterized in that: A leakage tube (60271) is connected through the bottom of the leakage chamber (6024). Both leakage tubes (60271) are connected through a detection box (6027). A conductivity probe (60272) is provided inside the detection box (6027). The conductivity probe (60272) is electrically connected to the control device of the hydraulic station.

6. The connecting shaft for a corn harvester with adjustable power output according to claim 5, characterized in that: The hydraulic cylinder (608) is provided with two limiting rings (6085) inside. A piston (6084) is fixed at the end of the telescopic rod (6083) inside the hydraulic cylinder (608). The piston (6084) is slidably arranged between the two limiting rings (6085). The two cavities of the hydraulic cylinder (608) located at the end of the limiting ring (6085) away from the piston (6084) are connected to the front hydraulic pipe (6081) and the rear hydraulic pipe (6082) respectively. The front hydraulic pipe (6081) and the rear hydraulic pipe (6082) are connected to the pipelines of the hydraulic station respectively.

7. The connecting shaft for a corn harvester with adjustable power output according to claim 6, characterized in that: A support shaft (702) is coaxially fixed to one end of the gear (701) facing the half-shaft end gear sleeve (604), and the support shaft (702) is inserted into the interior of the half-shaft end gear sleeve (604). An annular second retaining groove (7021) is concave at the end of the circumferential surface of the support shaft (702), and a combined retaining ring (703) is clamped inside the second retaining groove (7021). The half-shaft end gear sleeve (604) is clamped between the combined retaining ring (703) and the gear (701).

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