Timing drive system for inhibiting multi-drum threshing vibration and grain combine harvester

Abstract

The invention provides a timing drive system for inhibiting multi-drum threshing vibration and a grain combine harvester. The timing drive system comprises at least two coaxially mounted threshing drums, an engine and a timing drive mechanism, rotating shafts of the threshing drums are connected with the engine, and power of the engine is transferred to the rotating shafts of the threshing drums through the timing drive mechanism, so that all the threshing drums synchronously rotate. Rotating angles cannot produce a deviation. The timing drive mechanism comprises a cogged V-belt and a timing gear, and eccentric force on the threshing drums can be mutually offset owing to the transfer function of the cogged V-belt. When factors such as material weight or rotating speed change and cause fluctuation of the eccentric force on the threshing drums, residual eccentric force can be offset by pulling force provided by the cogged V-belt, and eccentric vibration is prevented. The problem of unbalanced vibration caused by material impact in the threshing process of an existing threshing drum is solved, and the stability and the threshing performance of the threshing drums are ensured.

Description

technical field

[0001] The invention belongs to the technical field of grain combine harvester transmission, and in particular relates to a multi-stage timing transmission system and a grain combine harvester for suppressing multi-drum threshing vibration. Background technique

[0002] During the working process of the grain combine harvester threshing drum, the material will rotate with it at a high speed after entering the threshing drum. Since the quality of the material is not balanced relative to the rotation center of the threshing drum, an eccentric force will be generated during the high-speed rotation , Destroying the dynamic balance of the threshing drum, causing the unbalanced vibration of the threshing drum, which is easy to cause the threshing drum to malfunction. Suppressing the unbalanced vibration of the threshing drum is crucial to ensure the threshing performance of the threshing drum, and eliminating the eccentric force generated by the high-speed rotation...

Examples

Embodiment 1

[0073] A timing transmission system for suppressing multi-cylinder threshing vibration, comprising at least two coaxially installed threshing cylinders, a motor 4 and a timing transmission mechanism 5; the timing transmission mechanism 5 connects the rotating shafts of each threshing cylinder to the engine 4 , the power of the engine 4 is transmitted to the rotating shafts of each threshing cylinder through the timing transmission mechanism 5, so that all the threshing cylinders rotate synchronously.

[0074] The timing transmission mechanism 5 includes several toothed V-belts and timing gears; the toothed V-belts connect the rotating shafts of each threshing cylinder with the engine 4 through the timing gears.

[0075] The speed relationship of the threshing drum should satisfy n 1 =n 2 =n 3  ….=n i ; The mass relation of the material in the threshing drum is m 1 >m 2 >m 3 …>m i ; In order to guarantee that the centrifugal force relation that material produces in each ...

Embodiment 2

[0089] Such as figure 1 As shown, the difference between the present embodiment 2 and the embodiment 1 mainly lies in that the quantity of the threshing drums of the timing transmission system for suppressing the multi-drum threshing vibration described in the present embodiment 2 is 3, including the threshing drum I1, the threshing drum II2 and the threshing drum II2. Threshing drum III3. The threshing drum I1 is located on the left side of the threshing drum II2; the threshing drum III3 is located on the right side of the threshing drum II2; the engine 4 is located at the left bottom of the threshing drum I1; Cylinder III3 is connected with engine 4 to ensure that each threshing cylinder rotates synchronously without deviation in rotation angle. The timing transmission system cancels the eccentric vibrations on threshing cylinder I1, threshing cylinder II2 and threshing cylinder III3.

[0090] Such as figure 2As shown, the timing drive system 5 includes a toothed V-belt I...

Embodiment 3

[0127] A combine harvester includes the timing transmission system for suppressing multi-drum threshing vibration described in Embodiment 1 or Embodiment 2, so it has the beneficial effects described in Embodiments 1 and 2, and will not be repeated here.

technical field

[0001] The invention belongs to the technical field of grain combine harvester transmission, and in particular relates to a multi-stage timing transmission system and a grain combine harvester for suppressing multi-drum threshing vibration. Background technique

[0002] During the working process of the grain combine harvester threshing drum, the material will rotate with it at a high speed after entering the threshing drum. Since the quality of the material is not balanced relative to the rotation center of the threshing drum, an eccentric force will be generated during the high-speed rotation , Destroying the dynamic balance of the threshing drum, causing the unbalanced vibration of the threshing drum, which is easy to cause the threshing drum to malfunction. Suppressing the unbalanced vibration of the threshing drum is crucial to ensure the threshing performance of the threshing drum, and eliminating the eccentric force generated by the high-speed rotation...

Examples

Embodiment 1

[0073] A timing transmission system for suppressing multi-cylinder threshing vibration, comprising at least two coaxially installed threshing cylinders, a motor 4 and a timing transmission mechanism 5; the timing transmission mechanism 5 connects the rotating shafts of each threshing cylinder to the engine 4 , the power of the engine 4 is transmitted to the rotating shafts of each threshing cylinder through the timing transmission mechanism 5, so that all the threshing cylinders rotate synchronously.

[0074] The timing transmission mechanism 5 includes several toothed V-belts and timing gears; the toothed V-belts connect the rotating shafts of each threshing cylinder with the engine 4 through the timing gears.

[0075] The speed relationship of the threshing drum should satisfy n 1 =n 2 =n 3  ….=n i ; The mass relation of the material in the threshing drum is m 1 >m 2 >m 3 …>m i ; In order to guarantee that the centrifugal force relation that material produces in each ...

Embodiment 2

[0089] Such as figure 1 As shown, the difference between the present embodiment 2 and the embodiment 1 mainly lies in that the quantity of the threshing drums of the timing transmission system for suppressing the multi-drum threshing vibration described in the present embodiment 2 is 3, including the threshing drum I1, the threshing drum II2 and the threshing drum II2. Threshing drum III3. The threshing drum I1 is located on the left side of the threshing drum II2; the threshing drum III3 is located on the right side of the threshing drum II2; the engine 4 is located at the left bottom of the threshing drum I1; Cylinder III3 is connected with engine 4 to ensure that each threshing cylinder rotates synchronously without deviation in rotation angle. The timing transmission system cancels the eccentric vibrations on threshing cylinder I1, threshing cylinder II2 and threshing cylinder III3.

[0090] Such as figure 2As shown, the timing drive system 5 includes a toothed V-belt I...

Embodiment 3

[0127] A combine harvester includes the timing transmission system for suppressing multi-drum threshing vibration described in Embodiment 1 or Embodiment 2, so it has the beneficial effects described in Embodiments 1 and 2, and will not be repeated here.

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