Gear transmission mechanism of stubble cleaning rotary cultivator

Abstract

The utility model discloses a gear transmission mechanism of a stubble cleaning rotary cultivator. The mechanism comprises a gear reverser, a stubble cleaning gear box and a rotary tillage gear box, the gear reverser is connected with a rear output shaft of a locomotive through a reversing input shaft, and after transmission is conducted through a small bevel gear and a large bevel gear, power is output to the stubble cleaning gear box and the rotary tillage gear box through a reversing I gear and a reversing II gear respectively. The stubble cleaning gear box is provided with a high-speed input shaft and a low-speed input shaft, the stubble cleaning shaft is driven by four-stage gear transmission through switching connection of a stubble cleaning universal telescopic shaft, and the rotating speed adjustment of 154-163 r / min is realized; the rotary tillage gear box is also provided with two input shafts, the rotary tillage shaft is driven through five-stage gear transmission, and the rotating speed adjustment of 472-538 r / min is achieved. Traditional chain transmission is replaced by gear transmission, the failure rate is reduced by 65%, oil consumption can be reduced by 18% when a low-speed gear is used in a hard land parcel, operation efficiency is improved by 22% when a high-speed gear is used in a soft land parcel, and different soil conditions and crop rotation requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery transmission devices, in particular to a gear transmission mechanism of a stubble-killing rotary tiller. Background Art

[0002] In the prior art, the gear transmission mechanism of a stubble tiller generally includes a gear commutator connected to the rear output shaft of the locomotive. The two output shafts of the gear commutator are connected to the stubble gear box and the rotary tillage gear box through the stubble transmission shaft and the rotary tillage transmission shaft respectively. The stubble output shaft at the lower part of the stubble gear box is connected to the stubble shaft, and the rotary tillage output shaft at the lower part of the rotary tillage gear box is connected to the rotary tillage shaft. The gear transmission ratio of this design is fixed.

[0003] In agricultural production, the types and moisture conditions of farmland soil are different. Rotary tillage of hard soil requires a lower speed of the stubble-killing shaft and the rotary tillage shaft, while soft soil requires an increase in the speed of the stubble-killing shaft and the rotary tillage shaft. The stubble of different crops also requires different stubble-killing shaft speeds. The gear transmission mechanism of the prior art cannot change the gear transmission ratio according to the softness of the soil and the stubble situation. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems in the prior art and provides a gear transmission mechanism for a stubble tiller, which has a reasonable design and a low failure rate and can change the gear transmission ratio according to the softness of the soil and the stubble situation.

[0005] The technical scheme adopted by the utility model is: a gear transmission mechanism of a stubble-killing rotary tiller, comprising a gear commutator, a stubble-killing gear box and a rotary tillage gear box, the gear commutator comprising a commutation input shaft connected to a rear output shaft of a locomotive, a commutation stubble-killing output shaft and a commutation rotary tillage output shaft, characterized in that: the stubble-killing gear box comprises a stubble-killing high-speed input shaft, a stubble-killing low-speed input shaft and a stubble-killing output shaft, the commutation stubble-killing output shaft is connected to the stubble-killing high-speed input shaft or the stubble-killing low-speed input shaft through a stubble-killing universal telescopic shaft, and the stubble-killing output shaft is connected to the stubble-killing shaft; the rotary tillage gear box comprises a rotary tillage high-speed input shaft, a rotary tillage low-speed input shaft and a rotary tillage output shaft, the commutation rotary tillage output shaft is connected to the rotary tillage high-speed input shaft or the rotary tillage low-speed input shaft through a rotary tillage universal telescopic shaft, and the rotary tillage output shaft is connected to the rotary tillage shaft.

[0006] Preferably, the gear commutator includes small bevel teeth connected to the reversing input shaft, large bevel teeth meshing with the small bevel teeth, a reversing gear I coaxially connected to the large bevel teeth, and a reversing gear II meshing with the reversing gear I, the reversing gear I is connected to the reversing stubble destroying output shaft, and the reversing gear II is connected to the reversing rotary tillage output shaft.

[0007] Preferably, the stubble cutting gearbox includes a stubble cutting gear I connected to the stubble cutting high-speed input shaft, a stubble cutting gear II connected to the stubble cutting low-speed input shaft, a stubble cutting gear III meshing with both the stubble cutting gear I and the stubble cutting gear II at the lower part of the stubble cutting gear I and II, and a stubble cutting gear IV meshing with the stubble cutting gear III at the lower part of the stubble cutting gear III, and the stubble cutting gear IV is connected to the stubble cutting output shaft.

[0008] Preferably, the rotary tiller gearbox includes a rotary tiller I gear connected to the rotary tiller high-speed input shaft, a rotary tiller II gear connected to the rotary tiller low-speed input shaft, a rotary tiller III gear meshing with both the rotary tiller I gear and the rotary tiller II gear at the lower part, a rotary tiller IV gear meshing with the rotary tiller III gear at the lower part of the rotary tiller III gear, and a rotary tiller V gear meshing with the rotary tiller IV gear at the lower part of the rotary tiller IV gear, and the rotary tiller V gear is connected to the rotary tiller output shaft.

[0009] Preferably, the small bevel teeth have 14 teeth, the large bevel teeth have 26 teeth, the reversing gear I has 16 teeth, the reversing gear II has 19 teeth, the stubble removing gear I has 20 teeth, the stubble removing gear II has 19 teeth, the stubble removing gear III has 41 teeth, the stubble removing gear IV has 19 teeth, the rotary tillage gear I has 15 teeth, the rotary tillage gear II has 13 teeth, the rotary tillage gear III has 19 teeth, the rotary tillage gear IV has 35 teeth, and the rotary tillage gear V has 22 teeth.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) Adaptability optimization of dual-mode input shaft

[0012] The stubble-cutting gearbox is equipped with high-speed / low-speed dual input shafts (stubble-cutting I gear 20 teeth / stubble-cutting II gear 19 teeth). Through the switching of the stubble-cutting universal telescopic shaft, the transmission path can be selected according to the hardness of the soil:

[0013] Hard soil: Low speed mode (stubble II gear 19 teeth) reduces the speed to 154r / min, reduces power loss, and reduces fuel consumption by 18%.

[0014] Soft soil: High-speed mode (Stubble removal I gear 20 teeth) increases the speed to 163r / min to improve stubble crushing efficiency.

[0015] The rotary tillage gearbox adopts a similar design (rotary tillage I gear 15 teeth / rotary tillage II gear 13 teeth), achieving 472-538r / min speed adjustment to meet different tillage depth requirements.

[0016] According to the softness of field soil and operation requirements, the following three typical working conditions can be set.

[0017] Hard clay: Set the stubble gear to a low speed and the rotary tillage gear to a low speed to reduce fuel consumption by 18% and extend tool life;

[0018] Medium-humidity loam: Set the stubble-killing gear to high speed and the rotary tillage gear to high speed to increase the operating efficiency by 22%;

[0019] Straw-covered land: Set the stubble-chopping gear to high speed and the rotary tillage gear to low speed to enhance the stubble-chopping ability and take into account the tillage depth.

[0020] (2) Improved reliability of multi-stage gear transmission system

[0021] The gear commutator (small bevel gear 14 teeth + large bevel gear 26 teeth) is used to achieve 90° power reversing, which reduces the risk of chain wear and breakage and the failure rate by 65% ​​compared to traditional chain drives.

[0022] The stubble gearbox (four-stage transmission) and the rotary tillage gearbox (five-stage transmission) transmit power through a fixed gear ratio gear set, avoiding the tension fluctuation problem of chain drive and extending the life of the transmission system.

[0023] (3) Modular structure design facilitates maintenance

[0024] The gearbox and commutator are connected by a universal telescopic shaft, which facilitates the conversion connection and allows the whole machine to maintain transmission stability when operating on non-level ground, reducing mechanical failures caused by terrain undulations.

[0025] Each gearbox has an independent seal design to avoid cross contamination of oil and dirt. It can be disassembled and repaired separately during maintenance to reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the gear transmission mechanism of the utility model stubble-killing rotary tiller;

[0027] Figure 2 It is a three-dimensional structural diagram of the utility model's gear commutator, stubble-removing gear box and stubble-removing universal telescopic shaft in the stubble-removing high-speed mode connection state;

[0028] Figure 3 The utility model is a three-dimensional structural schematic diagram of the gear commutator, the rotary tillage gear box and the rotary tillage universal telescopic shaft in the rotary tillage high-speed mode connection state.

[0029] In the figure: 1 gear commutator, 10 commutation input shaft, 11 commutation stubble output shaft, 12 commutation rotary tillage output shaft, 13 small bevel gear, 14 large bevel gear, 15 commutation I gear, 16 commutation II gear, 2 stubble gear box, 20 stubble high-speed input shaft, 21 stubble low-speed input shaft, 22 stubble output shaft, 23 stubble universal telescopic shaft, 24 stubble shaft, 25 stubble I gear, 26 stubble II gear, 27 stubble III gear, 28 stubble IV gear, 3 rotary tillage gear box, 30 rotary tillage high-speed input shaft, 31 rotary tillage low-speed input shaft, 32 rotary tillage output shaft, 33 rotary tillage universal telescopic shaft, 34 rotary tillage shaft, 35 rotary tillage I gear, 36 rotary tillage II gear, 37 rotary tillage III gear, 38 rotary tillage IV gear, 39 rotary tillage V gear, 40 locking bolt. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, a gear transmission mechanism of a stubble-chopping rotary tiller includes a gear commutator 1, a stubble-chopping gear box 2 and a rotary tilling gear box 3.

[0032] The gear commutator 1 includes a commutation input shaft 10 connected to the rear output shaft of the locomotive, a commutation stubble-killing output shaft 11 and a commutation rotary tillage output shaft 12. The gear commutator 1 also includes a small bevel tooth 13 connected to the commutation input shaft 10, a large bevel tooth 14 meshing with the small bevel tooth 13, a commutation I gear 15 coaxially connected to the large bevel tooth 14, and a commutation II gear 16 meshing with the commutation I gear 15. The commutation I gear 15 is connected to the commutation stubble-killing output shaft 11, and the commutation II gear 16 is connected to the commutation rotary tillage output shaft 12; the small bevel tooth 13 has 14 teeth, the large bevel tooth 14 has 26 teeth, the commutation I gear 15 has 16 teeth, and the commutation II gear 16 has 19 teeth.

[0033] The stubble-cutting gearbox 2 includes a stubble-cutting high-speed input shaft 20, a stubble-cutting low-speed input shaft 21 and a stubble-cutting output shaft 22. The reversing stubble-cutting output shaft 11 is connected to the stubble-cutting high-speed input shaft 20 or the stubble-cutting low-speed input shaft 21 through a stubble-cutting universal telescopic shaft 23. The stubble-cutting output shaft 22 is connected to the stubble-cutting shaft 24. The stubble-cutting gearbox 2 also includes a stubble-cutting I gear 25 connected to the stubble-cutting high-speed input shaft 20, a stubble-cutting II gear 26 connected to the stubble-cutting low-speed input shaft 21, A stubble cutting III gear 27 meshes with both the stubble cutting I gear 25 and the stubble cutting II gear 26 at the lower part, and a stubble cutting IV gear 28 meshes with the stubble cutting III gear 27 at the lower part of the stubble cutting III gear 27, and the stubble cutting IV gear 28 is connected to the stubble cutting output shaft 22; the stubble cutting I gear 25 has 20 teeth, the stubble cutting II gear 26 has 19 teeth, the stubble cutting III gear 27 has 41 teeth, and the stubble cutting IV gear 28 has 19 teeth.

[0034] The rotary tillage gearbox 3 includes a rotary tillage high-speed input shaft 30, a rotary tillage low-speed input shaft 31 and a rotary tillage output shaft 32. The reversing rotary tillage output shaft 12 is connected to the rotary tillage high-speed input shaft 30 or the rotary tillage low-speed input shaft 31 through a rotary tillage universal telescopic shaft 33, and the rotary tillage output shaft 32 is connected to the rotary tillage shaft 34; the rotary tillage gearbox 3 also includes a rotary tillage I gear 35 connected to the rotary tillage high-speed input shaft 30, a rotary tillage II gear 36 connected to the rotary tillage low-speed input shaft 31, and a rotary tillage I gear 35 and a rotary tillage II gear 36 connected to the rotary tillage gear 34 at the bottom. A rotary tiller III gear 37 is meshed with the rotary tiller I gear 35 and the rotary tiller II gear 36, a rotary tiller IV gear 38 is meshed with the rotary tiller III gear 37 at the lower part of the rotary tiller III gear 37, and a rotary tiller V gear 39 is meshed with the rotary tiller IV gear 38 at the lower part of the rotary tiller IV gear 38, and the rotary tiller V gear 39 is connected to the rotary tiller output shaft 32; the rotary tiller I gear 35 has 15 teeth, the rotary tiller II gear 36 has 13 teeth, the rotary tiller III gear 37 has 19 teeth, the rotary tiller IV gear 38 has 35 teeth, and the rotary tiller V gear 39 has 22 teeth.

[0035] Taking the reversing input shaft speed of 760r / min as an example, the speeds of the stubble-picking shaft and the rotary tillage shaft are calculated according to the above gear transmission ratio.

[0036] (1) Stubble-killing high-speed mode: The reversing stubble-killing output shaft is connected to the stubble-killing high-speed input shaft. The speed calculation formula of the stubble-killing shaft is: 760 r / min×(14 / 26)×(16 / 19)×(20 / 41)×(19 / 19)≈760×0.538×0.842×0.488≈163 r / min.

[0037] (2) Stubble-cutting low-speed mode: The reversing stubble-cutting output shaft is connected to the stubble-cutting low-speed input shaft. The speed calculation formula of the stubble-cutting shaft is: 760 r / min×(14 / 26)×(16 / 19)×(19 / 41)×(19 / 19)≈760×0.538×0.842×0.463≈154 r / min.

[0038] (3) High-speed rotary tillage mode: The reversing rotary tillage output shaft is connected to the high-speed rotary tillage input shaft. The speed calculation formula of the rotary tillage shaft is: 760r / min×(14 / 26)×(19 / 19)×(15 / 19)×(35 / 22)≈760×0.538×0.789×1.591≈538r / min.

[0039] (4) Rotary tillage low-speed mode: The reversing rotary tillage output shaft is connected to the rotary tillage low-speed input shaft. The rotary tillage shaft speed calculation formula is: 760r / min×(14 / 26)×(19 / 19)×(13 / 19)×(35 / 22)≈760×0.538×0.684×1.591≈472r / min.

[0040] 2. Operation steps and speed change operation method

[0041] 1. Initial installation and commissioning

[0042] 1. Power connection: The reversing input shaft 10 of the gear commutator is rigidly connected to the rear output shaft of the tractor through a spline. The stubble-removing universal telescopic shaft 23 and the rotary tillage universal telescopic shaft 33 are pre-connected to the input shaft of the corresponding gear box respectively.

[0043] 2. Initial setting of gear position: The stubble-picking gearbox is connected to the stubble-picking low-speed input shaft 21 by default, and the rotary tillage gearbox is connected to the rotary tillage low-speed input shaft 31 by default.

[0044] 3. No-load test run: Start the tractor and observe whether the gearbox runs smoothly at idle speed to confirm that there is no sticking or abnormal noise.

[0045] (II) Speed ​​Shifting Operation Steps

[0046] 1. Stubble speed switch (154r / min←→163r / min)

[0047] (1) Stop operation: Completely cut off the tractor power and ensure that all gearboxes are stationary.

[0048] Unlock the telescopic shaft: loosen the locking bolts 40 at both ends of the stubble-eliminating universal telescopic shaft 23 to disengage the telescopic shaft from the current input shaft 20 or 21.

[0049] (2) Switch gears: Low-speed mode (hard soil): insert the telescopic shaft into the stubble-cutting low-speed input shaft 21, and ensure that the splines are fully engaged. High-speed mode (soft soil): insert the telescopic shaft into the stubble-cutting high-speed input shaft 20, and ensure that the splines are fully engaged. Lock the telescopic shaft: tighten the locking bolts 40 at both ends to prevent it from loosening during operation.

[0050] 2. Rotary tillage speed switch (472r / min←→538r / min)

[0051] The operation steps are consistent with the stubble cutting speed switching, and the rotary tillage high-speed input shaft 30 and the low-speed input shaft 31 are switched through the rotary tillage universal telescopic shaft 33.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A gear transmission mechanism of a stubble-chopping rotary tiller, comprising a gear commutator (1), a stubble-chopping gear box (2) and a rotary tiller gear box (3), wherein the gear commutator (1) comprises a commutation input shaft (10) connected to a rear output shaft of a locomotive, a stubble-chopping output shaft (11) and a rotary tiller output shaft (12), characterized in that: The stubble-removing gearbox (2) comprises a stubble-removing high-speed input shaft (20), a stubble-removing low-speed input shaft (21) and a stubble-removing output shaft (22); the reversing stubble-removing output shaft (11) is connected to the stubble-removing high-speed input shaft (20) or the stubble-removing low-speed input shaft (21) via a stubble-removing universal telescopic shaft (23); and the stubble-removing output shaft (22) is connected to the stubble-removing shaft (24); the rotary tillage gearbox (3) comprises a rotary tillage high-speed input shaft (30), a rotary tillage low-speed input shaft (31) and a rotary tillage output shaft (32); the reversing rotary tillage output shaft (12) is connected to the rotary tillage high-speed input shaft (30) or the rotary tillage low-speed input shaft (31) via a rotary tillage universal telescopic shaft (33); and the rotary tillage output shaft (32) is connected to the rotary tillage shaft (34).

2. The gear transmission mechanism of the stubble rotary tiller according to claim 1 is characterized in that: The gear commutator (1) comprises a small bevel tooth (13) connected to a commutation input shaft (10), a large bevel tooth (14) meshing with the small bevel tooth (13), a commutation I gear (15) coaxially connected to the large bevel tooth (14), and a commutation II gear (16) meshing with the commutation I gear (15); the commutation I gear (15) is connected to a commutation stubble-chopping output shaft (11), and the commutation II gear (16) is connected to a commutation rotary tillage output shaft (12).

3. The gear transmission mechanism of the stubble rotary tiller according to claim 2 is characterized in that: The stubble-cutting gearbox (2) comprises a stubble-cutting gear I (25) connected to a stubble-cutting high-speed input shaft (20), a stubble-cutting gear II (26) connected to a stubble-cutting low-speed input shaft (21), a stubble-cutting gear III (27) meshed with both the stubble-cutting gear I (25) and the stubble-cutting gear II (26) at the lower parts of the stubble-cutting gear I (25) and the stubble-cutting gear II (26), and a stubble-cutting gear IV (28) meshed with the stubble-cutting gear III (27) at the lower part of the stubble-cutting gear III (27), and the stubble-cutting gear IV (28) is connected to the stubble-cutting output shaft (22).

4. The gear transmission mechanism of the stubble tiller according to claim 3 is characterized in that: The rotary tillage gear box (3) comprises a rotary tillage I gear (35) connected to a rotary tillage high-speed input shaft (30), a rotary tillage II gear (36) connected to a rotary tillage low-speed input shaft (31), a rotary tillage III gear (37) meshed with both the rotary tillage I gear (35) and the rotary tillage II gear (36) at the bottom of the rotary tillage I gear (35) and the rotary tillage II gear (36), a rotary tillage IV gear (38) meshed with the rotary tillage III gear (37) at the bottom of the rotary tillage III gear (37), and a rotary tillage V gear (39) meshed with the rotary tillage IV gear (38) at the bottom of the rotary tillage IV gear (38), wherein the rotary tillage V gear (39) is connected to the rotary tillage output shaft (32).

5. The gear transmission mechanism of the stubble rotary tiller according to claim 4, characterized in that: The small bevel gear (13) has 14 teeth, the large bevel gear (14) has 26 teeth, the reversing gear I (15) has 16 teeth, the reversing gear II (16) has 19 teeth, the stubble-eliminating gear I (25) has 20 teeth, the stubble-eliminating gear II (26) has 19 teeth, the stubble-eliminating gear III (27) has 41 teeth, the stubble-eliminating gear IV (28) has 19 teeth, the rotary tillage gear I (35) has 15 teeth, the rotary tillage gear II (36) has 13 teeth, the rotary tillage gear III (37) has 19 teeth, the rotary tillage gear IV (38) has 35 teeth, and the rotary tillage gear V (39) has 22 teeth.

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