Stepless speed change device for threshing cylinder of full-feeding combine harvester

Abstract

The utility model relates to the technical field of harvesters, in particular to a stepless speed change device for a threshing cylinder of a whole-feed combine harvester. A whole-feeding combine harvester threshing cylinder stepless speed change device comprises a harvester body and a threshing cylinder, a reversing transmission box is arranged in the harvester body, and a stepless speed change wheel is movably arranged in the reversing transmission box. The stepless speed change wheel is arranged between an engine output shaft of the harvester body and a roller shaft of a threshing cylinder, and a telescopic assembly is connected between the stepless speed change wheel and the reversing transmission box. The stepless speed change wheel can be pushed to move through the telescopic assembly, so that the contact radius of the second transmission belt, the third transmission belt and the stepless speed change wheel is increased or decreased, acceleration or deceleration of the threshing roller is achieved, stepless adjustment of rotation of the threshing roller is achieved, the threshing requirements of different crops are conveniently met, and the threshing efficiency of the threshing roller is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of harvesters, in particular to a stepless speed change device for a threshing drum of a full-feeding combine harvester. Background Art

[0002] The speed of the current combine harvester drum is generally adjusted in steps, mostly with 4-8 speed adjustment levels. During normal harvesting of a full-feed combine harvester, grains flow into the threshing body through the bridge and are threshed by the threshing drum. The threshing effect mainly depends on the threshing speed of the threshing drum. The higher the speed of the threshing drum, the better the threshing effect, but the grain breakage rate will also increase accordingly; the lower the speed of the threshing drum, the lower the grain breakage rate, but the threshing effect will become worse. Therefore, it is necessary to determine the optimal threshing speed of the threshing drum so that the harvester has the best harvesting effect. However, due to differences in harvesting environment and grain varieties, the optimal threshing speed of the threshing drum is not consistent. The stepless speed change of the drum of existing products is achieved by gear operation. When harvesting different crops, it is impossible to achieve an ideal harvesting effect.

[0003] Therefore, the present application provides a stepless speed change device for a threshing drum of a full-feed combine harvester, which facilitates stepless adjustment of the rotation speed of the threshing drum and improves the threshing effect. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a stepless speed change device for a threshing drum of a full-feed combine harvester.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a stepless speed change device for a threshing drum of a full-feed combine harvester, comprising a harvester body and a threshing drum, a reversing transmission box is arranged inside the harvester body, a stepless speed change wheel is movably arranged inside the reversing transmission box, the stepless speed change wheel is arranged between the engine output shaft of the harvester body and the roller shaft of the threshing drum, and a telescopic component is connected between the stepless speed change wheel and the reversing transmission box.

[0006] As an optimization, an intermediate shaft is provided inside the harvester body, a first transmission belt is connected between the intermediate shaft and the engine output shaft, a second transmission belt is connected between the intermediate shaft and the continuously variable speed wheel, and a third transmission belt is connected between the continuously variable speed wheel and the roller shaft of the threshing drum.

[0007] As an optimization, the continuously variable speed wheel includes a connecting shaft and a transmission sleeve, the connecting shaft is connected to the telescopic assembly, and a transmission bearing is connected between the transmission sleeve and the connecting shaft;

[0008] A fixing part and two adjusting parts are provided on the outside of the transmission sleeve. The adjusting part is detachably connected to the transmission sleeve. A first connecting groove and a second connecting groove are formed between the two adjusting parts and the fixing part. The first connecting groove is used to accommodate a second transmission belt, and the second connecting groove is used to accommodate a third transmission belt.

[0009] As an optimization, a connecting arm is rotatably connected inside the harvester body, and a guide groove is provided along the length direction at the outer end of the connecting arm, and the connecting shaft is slidably connected to the inside of the guide groove.

[0010] As an optimization, the telescopic assembly includes a telescopic cylinder, a fixed end of the telescopic cylinder is rotatably connected to the inner wall of the reversing transmission box, and an extended end of the telescopic cylinder is connected to the axial direction of the continuously variable speed wheel.

[0011] As an optimization, the thickness of the fixing part gradually decreases from the axial direction of the transmission sleeve to the outside, the end of the fixing part adjacent to the transmission sleeve is connected to a limiting ring, the side of the adjusting part opposite to the fixing part is inclined in a direction away from the fixing part, the end of the adjusting part adjacent to the transmission sleeve is recessed to form a groove, and the outer end of the limiting ring extends into the groove.

[0012] As an optimization, the widths of the first connecting groove and the second connecting groove gradually increase from the axis of the continuously variable speed wheel toward the outside.

[0013] The present invention provides a stepless speed change device for a threshing drum of a full-feed combine harvester, which has the following advantages:

[0014] The present application arranges a continuously variable speed wheel between the threshing drum and the harvester body. The continuously variable speed wheel can be pushed to move by the telescopic component, so that the contact radius of the second transmission belt, the third transmission belt and the continuously variable speed wheel is increased or decreased, thereby realizing acceleration or deceleration of the threshing drum and realizing stepless adjustment of the rotation of the threshing drum, which is convenient to adapt to the threshing needs of different crops and improve the threshing efficiency of the threshing drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a structural schematic diagram of the utility model.

[0016] Attached Figure 2 It is a schematic diagram of the transmission structure of the continuously variable speed wheel of the utility model.

[0017] Attached Figure 3 It is a schematic diagram of the cutaway structure of the continuously variable speed wheel of the utility model.

[0018] Among them, 1. threshing drum, 2. reversing transmission box, 3. continuously variable speed wheel, 4. engine output shaft, 5. intermediate shaft, 6. first transmission belt, 7. second transmission belt, 8. third transmission belt, 9. connecting shaft, 10. transmission sleeve, 11. transmission bearing, 12. fixing part, 13. adjusting part, 14. connecting arm, 15. guide groove, 16. telescopic cylinder, 17. limiting ring, 18. first connecting groove, 19. second connecting groove. DETAILED DESCRIPTION

[0019] like Figure 1-3 As shown, a continuously variable speed change device of a threshing drum 1 of a full-feed combine harvester comprises a harvester body and a threshing drum 1, a reversing transmission box 2 is provided inside the harvester body, a continuously variable speed change wheel 3 is movably provided inside the reversing transmission box 2, the continuously variable speed change wheel 3 is arranged between the engine output shaft 4 of the harvester body and the roller shaft of the threshing drum 1, and a telescopic component is connected between the continuously variable speed change wheel 3 and the reversing transmission box 2.

[0020] As shown in the figure, an intermediate shaft 5 is provided inside the harvester body, a first transmission belt 6 is connected between the intermediate shaft 5 and the engine output shaft 4, a second transmission belt 7 is connected between the intermediate shaft 5 and the continuously variable speed wheel 3, and a third transmission belt 8 is connected between the continuously variable speed wheel 3 and the roller shaft of the threshing drum 1.

[0021] The continuously variable speed wheel 3 is located between the intermediate shaft 5 and the threshing drum 1 , and the telescopic assembly can push the continuously variable speed wheel 3 to move toward the intermediate shaft 5 or the threshing drum 1 .

[0022] like Figure 1-3 As shown, the continuously variable speed wheel 3 includes a connecting shaft 9 and a transmission sleeve 10, the connecting shaft 9 is connected to the telescopic assembly, and a transmission bearing 11 is connected between the transmission sleeve 10 and the connecting shaft 9;

[0023] A fixing portion 12 and two adjusting portions 13 are provided on the outside of the transmission sleeve 10. The adjusting portion 13 is detachably connected to the transmission sleeve 10. A first connecting groove 18 and a second connecting groove 19 are formed between the two adjusting portions 13 and the fixing portion 12. The first connecting groove 18 is used to accommodate the second transmission belt 7, and the second connecting groove 19 is used to accommodate the third transmission belt 8.

[0024] The depth of the first connecting groove 18 and the second connecting groove 19 is greater than the thickness of the first transmission belt 6 and the second transmission belt 7 .

[0025] like Figure 1 As shown, a connecting arm 14 is rotatably connected inside the harvester body, and a guide groove 15 is provided at the outer end of the connecting arm 14 along the length direction, and the connecting shaft 9 is slidably connected inside the guide groove 15 .

[0026] The telescopic assembly includes a telescopic cylinder 16 , a fixed end of the telescopic cylinder 16 is rotatably connected to the inner wall of the reversing transmission box 2 , and an extended end of the telescopic cylinder 16 is connected to the axial direction of the continuously variable speed wheel 3 .

[0027] When the telescopic cylinder 16 pushes or pulls the continuously variable transmission wheel 3 , the connecting shaft 9 can slide inside the guide groove 15 .

[0028] like Figure 3 As shown, the thickness of the fixing portion 12 gradually decreases from the axial direction of the transmission sleeve 10 to the outside, and the end of the fixing portion 12 adjacent to the transmission sleeve 10 is connected to the limiting ring 17. The side of the adjusting portion 13 opposite to the fixing portion 12 is inclined in the direction away from the fixing portion 12. The end of the adjusting portion 13 adjacent to the transmission sleeve 10 is recessed to form a groove, and the outer end of the limiting ring 17 extends into the groove.

[0029] The widths of the first connecting groove 18 and the second connecting groove 19 gradually increase from the axis of the continuously variable speed wheel 3 toward the outside.

[0030] When the device is used, the power is output by the engine of the harvester body, and the power is transmitted to the intermediate shaft 5 through the first transmission belt 6;

[0031] The intermediate shaft 5 is transmitted to the continuously variable transmission wheel 3 through the second transmission belt 7, and the continuously variable transmission wheel 3 is then output to the threshing drum 1 through the third transmission belt 8;

[0032] When the threshing drum 1 needs to be accelerated, the telescopic cylinder 16 is shortened to pull the continuously variable transmission wheel 3 toward the threshing drum 1, so that the second transmission belt 7 moves toward the first connecting groove 18, the contact radius between the second transmission belt 7 and the continuously variable transmission is reduced, and the contact radius between the third transmission belt 8 and the continuously variable transmission is increased, so as to accelerate the threshing drum 1;

[0033] When it is necessary to slow down the threshing drum 1, the telescopic cylinder 16 extends, pushing the continuously variable speed wheel 3 to move away from the threshing drum 1, so that the second transmission belt 7 moves outward along the first connecting groove 18, the contact radius between the second transmission belt 7 and the continuously variable speed wheel 3 increases, and the contact radius between the third transmission belt 8 and the continuously variable speed wheel 3 decreases, thereby achieving deceleration of the threshing drum 1.

[0034] The present application achieves stepless regulation of the rotation speed of the threshing drum 1 by changing the contact diameter between the second transmission belt 7 and the continuously variable speed wheel 3 to change the transmission efficiency.

[0035] The above-mentioned specific implementation is only a specific case of the present utility model. The patent protection scope of the present utility model includes but is not limited to the product form and style of the above-mentioned specific implementation. Any stepless speed change device of the threshing drum of a full-feed combine harvester that complies with the claims of the present utility model and any appropriate changes or modifications made thereto by ordinary technicians in the corresponding technical field shall fall within the patent protection scope of the present utility model.

Claims

1. A threshing drum stepless speed change device for a full-feed combine harvester, comprising a harvester body and a threshing drum (1), characterized in that: A reversing transmission box (2) is provided inside the harvester body, a continuously variable transmission wheel (3) is movably provided inside the reversing transmission box (2), the continuously variable transmission wheel (3) is arranged between the engine output shaft (4) of the harvester body and the roller shaft of the threshing drum (1), and a telescopic component is connected between the continuously variable transmission wheel (3) and the reversing transmission box (2).

2. A continuously variable speed device for a threshing drum of a full-feed combine harvester according to claim 1, characterized in that: An intermediate shaft (5) is provided inside the harvester body, a first transmission belt (6) is connected between the intermediate shaft (5) and the engine output shaft (4), a second transmission belt (7) is connected between the intermediate shaft (5) and the continuously variable speed wheel (3), and a third transmission belt (8) is connected between the continuously variable speed wheel (3) and the roller shaft of the threshing drum (1).

3. A continuously variable speed device for a threshing drum of a full-feed combine harvester according to claim 2, characterized in that: The continuously variable speed wheel (3) comprises a connecting shaft (9) and a transmission sleeve (10), wherein the connecting shaft (9) is connected to the telescopic assembly, and a transmission bearing (11) is connected between the transmission sleeve (10) and the connecting shaft (9); The transmission sleeve (10) is provided with a fixing portion (12) and two adjusting portions (13) on the outside. The adjusting portion (13) is detachably connected to the transmission sleeve (10). A first connecting groove (18) and a second connecting groove (19) are formed between the two adjusting portions (13) and the fixing portion (12). The first connecting groove (18) is used to accommodate a second transmission belt (7), and the second connecting groove (19) is used to accommodate a third transmission belt (8).

4. A continuously variable speed device for a threshing drum of a full-feed combine harvester according to claim 3, characterized in that: A connecting arm (14) is rotatably connected inside the harvester body, and a guide groove (15) is provided at the outer end of the connecting arm (14) along the length direction, and the connecting shaft (9) is slidably connected inside the guide groove (15).

5. The stepless speed change device for the threshing drum of a full-feed combine harvester according to claim 1, characterized in that: The telescopic assembly comprises a telescopic cylinder (16), the fixed end of the telescopic cylinder (16) is rotatably connected to the inner wall of the reversing transmission box (2), and the extended end of the telescopic cylinder (16) is connected to the axial direction of the continuously variable speed wheel (3).

6. The stepless speed change device for the threshing drum of a full-feed combine harvester according to claim 3, characterized in that: The thickness of the fixing portion (12) gradually decreases outward from the axial direction of the transmission shaft sleeve (10); one end of the fixing portion (12) adjacent to the transmission shaft sleeve (10) is connected to a limiting ring (17); a side of the adjusting portion (13) opposite to the fixing portion (12) is inclined in a direction away from the fixing portion (12); one end of the adjusting portion (13) adjacent to the transmission shaft sleeve (10) is recessed to form a slot, and the outer end of the limiting ring (17) extends into the slot.

7. The stepless speed change device for the threshing drum of a full-feed combine harvester according to claim 3, characterized in that: The width of the first connecting groove (18) and the width of the second connecting groove (19) gradually increase from the axis of the continuously variable speed wheel (3) toward the outside.

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