JP2817158B2 - Vertical mover for the second cutting blade of the combine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a vertical moving device for a second cutting blade of a combine.

(Prior Art) Conventionally, Japanese Utility Model Laid-Open Publication No. 63-4621 discloses a cutting device which is provided with a corresponding device at the lower part of a traveling frame and a threshing device at the front and a vertically movable cutting unit. There is described a combine having a single cutting blade and a second cutting blade, wherein the first cutting blade is configured to move up and down together with the cutting unit, and is configured to be moved up and down by the second cutting blade vertical movement cylinder.

(Problems to be Solved by the Invention) Since the above-mentioned known one does not consider the relationship between the vertical movement speed of the second cutting blade and the vertical movement speed of the cutting unit, when the cutting unit moves upward, If the lowering movement of the second cutting blade is slow,
When the cutting height of the second cutting blade is higher than expected and uneven cutting is performed, and when the cutting unit moves down, the upward movement of the second cutting blade is slow,
The second cutting blade is an accident that plunges into the field.

Therefore, the present invention has solved the above-mentioned problem by always making the vertical movement speed of the second cutting blade faster than the vertical movement speed of the mowing part.

(Means for Solving the Problems) Accordingly, the present invention provides a traveling device
A threshing device 3 is provided at an upper part of the cutting unit 4. The cutting unit 4 is provided with a first and second cutting blades 6 and 13 which can move up and down in front of the threshing device. And a vertical moving speed F1 of the second cutting blade 13 and a vertical moving speed of the cutting unit 4 in a combine having a configuration in which the second mowing blade 13 is configured to move up and down together with the second mowing blade 13. The relationship of F2 is
It is a vertical moving device of the second cutting blade of the combine where F1> F2.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. 1 is a traveling frame, 2 is a traveling device provided at a lower portion of the traveling frame 1, 3 is a threshing device provided at an upper portion of the traveling frame 1, and 4 is a traveling device. A cutting section provided in front of the frame 1;
A scraping reel 5 is provided at a front side of the cutting blade, and a first cutting blade 6 is provided at a lower cutting frame 7.

Reference numeral 8 denotes an elevator extending from the cutting unit 4 to the threshing room of the threshing device 3, reference numeral 9 denotes a weeding body, and reference numeral 10 denotes an auxiliary scraping device provided behind the weeding body 9.

The reaper 4 is configured to move up and down with respect to the machine body about the upper rotation shaft 11 of the elevator 8 together with the elevator 8. Numeral 12 is a vertical moving cylinder of the mowing part.

Thus, a second cutting blade 13 described in detail below is provided between the rear surface of the cutting unit frame 7 and the front end of the traveling device 2.

A support frame 14 in the left-right direction is provided on the rear surface of the mowing unit frame 7. The support frame 14 is provided for the elevator 8
Of the left end bent part 15 is fixed to the left vertical rod 16 on the rear surface, and the right end bent part 17 is fixed.
Is fixed to the vertical rod 18.

A side position vertical axis tube 19 is fixed to the left end bent portion 15, and a center of gravity position vertical axis tube 20 is fixed to the right end bent portion 17. A vertical position side support rod 21 in the vertical direction is fitted to the side position vertical axis tube 19 so as to be vertically slidable. A center-of-gravity position vertical support rod 22 is fitted to the center-of-gravity position longitudinal axis tube 20 so as to be vertically slidable.

The lower end of the side position vertical support rod 21 is on the left side of the second cutting blade frame 23 of the second cutting blade 13, and the lower end of the center of gravity vertical support rod 22 is the left and right center of gravity of the second cutting blade frame 23. Install each position.

The lower end of the mounting arm 24 that stands upward is fixed to the upper surface of the support frame 14 on the right end bent portion 17 side, and the upper end of the mounting arm 24 is bent toward the center of gravity vertical support rod 22 and the position of the center of gravity is The upper end of the second vertical blade cylinder 25 is attached to the upper end of the mounting arm 24 so as to face the rear position of the vertical support rod 22. The lower end of the rod of the second cutting blade vertical movement cylinder 25 is attached to the lower end of the vertical support rod 22 at the center of gravity.

On the right side of the rear surface of the cutting section frame 7, the second cutting blade 13 is provided.
Is provided. Reference numeral 26 denotes a drive shaft, and a belt 30 is wound around a drive pulley 27 of the drive shaft 26 and a passive pulley 29 attached to a gear box 28. The upper end of a vertically movable telescopic transmission shaft 31 is attached to the gear box 28. The transmission shaft 31 is configured such that the upper end of a lower shaft 33 is vertically movably inserted into an upper shaft cylinder 32, and the upper shaft cylinder 32 and the lower shaft 33 transmit rotation by spline coupling. Lower shaft 33
Is indirectly fixed to the left end of the second cutting blade frame 23, and the transmission shaft 31 has the same function as the side position vertical support rod 21 and the side position vertical support frame 22.

At the lower end of the lower shaft 33, a crank 34 is attached, and at one end of a bell crank 35, an arm 36 is attached to the crank 34,
The other arm 37 of the bell crank 35 is attached to the sliding blade of the second cutting blade 13.

The left and right sensors 40 and 41 for controlling the height of the second cutting blade 13 are provided on the second cutting blade frame 23.

The left sensor 40 and the right sensor 41 have their bases fixed to shaft cylinders 43, 43 fitted and fixed to both ends of the horizontal shaft. The horizontal shaft 42 is rotatably mounted on a mounting member 44 at the lower end of the vertical support frame 22 at the center of gravity. Reference numeral 38 denotes a stay having a base fixed to the second cutting blade frame 23, and supports one end of the horizontal shaft 42.

The base of an arm 45 is fixed to the horizontal shaft 42 of the portion attached to the attachment member 44, and the lower end of a vertical rod 46 is axially mounted on the arm 45 by a pin 47.

The center-of-gravity position vertical support rod 22 is formed by a hollow pipe, and the rod 46 is inserted into the center-of-gravity position vertical support rod 22 so as to be vertically movable. The upper end of the rod 46 projects upward from the upper end of the vertical support rod 22 at the center of gravity, and a cam portion 50 having upper and lower cam surfaces 48, 49 is formed on the projected portion. At the upper end of the barycentric position vertical support rod 22, switches 51 and 52 are provided which come into contact with either the cam surface 48 or the cam surface 49 by the vertical movement of the rod 46. When the switch 51 is turned on, the second cutting blade vertical moving cylinder 25 is reduced, and when the switch 52 is turned on, the second cutting blade vertical moving cylinder 25 is expanded.

The sensor 40, 41, when its tip is slightly in contact with the top of the field, the cam surface 48 of the cam portion 50 of the rod 46,
Both of the switches 49 are in a neutral state where they are not in contact with the switches 51 and 52. Then, the tips of the left and right sensors 40 and 41 come into contact with the upper surface of the field to rotate the horizontal shaft 42, the horizontal shaft 42 rotates the arm 45, the arm 45 moves the rod 46 upward, and the cam portion 50 of the rod 46 When the cam surface 48 contacts the switch 51, the left and right sensors 40 and 41 are turned on, and the second cutting blade vertical movement cylinder 25 is operated to move the second cutting blade 13 upward.

Conversely, when the left and right sensors 40 and 41 move away from the ground and rotate by their own weight (may be biased by a spring) to move the rod 46 down and the cam surface 49 contacts the switch 52, the left and right sensors 40 and 41 Is turned on, the second cutting blade vertical movement cylinder 25 is extended, and the second cutting blade 13 is moved downward.

Thus, the relationship between the vertical movement speed F1 of the second cutting blade 13 and the vertical movement speed F2 of the cutting unit 4 is F1> F2, and the cutting unit 4
The vertical speed F1 of the second cutting blade 13 can be forced to be faster than the vertical speed F2.

That is, at the time of normal cutting work, the first cutting blade 6 cuts only the tip of the grain culm, and the second cutting blade 13 removes the grain culm left behind in the field by the first cutting blade 6 to a fixed height of the root side. Reap more. Therefore, when the cutting unit 4 moves upward, the second cutting blade 13 must be moved downward, and when the cutting unit 4 moves downward, the second cutting blade 13 must be moved upward. In this case, when the mowing part 4 moves upward,
If the downward movement of the second cutting blade 13 is slow, the cutting height of the second cutting blade 13 is higher than expected, and uneven cutting is performed, and when the cutting unit 4 moves downward, the upward movement of the second cutting blade 13 decreases. If it is too late, the second cutting blade 13 will crash into the field.

Therefore, the present invention is to reduce the height of the second cutting blade 13 by lowering the second cutting blade 13 faster than the cutting unit 4 moves upward, In addition, the upward movement of the second cutting blade 13 is accelerated, and the second cutting blade 13 is prevented from plunging into the field.

(Operation) Next, the operation will be described.

The present invention is configured as described above. When the machine body moves forward, weeding is performed by the weeding body 9, the scraping reel 5 is rotated to scrape the grain culm, and the grain is slid by the sliding blade of the cutting blade 6. Only the ears of the culm are harvested, and the cereal culm stalked into the auger by the raking reel 5 is joined to the base of the elevator 8 by the auger, conveyed by the elevator 8 and sent to the threshing device 3 for threshing. Therefore, only the tip of the grain culm is supplied to the threshing device 3, and the load on the threshing device 3 is reduced.

When the fuselage is further advanced, the second cutting blade 13 is provided on the cutting section frame 7 behind the first cutting blade 6, and the second cutting blade 13 is left behind in the field by the first cutting blade 6. The culm is harvested from the root side.

Thus, the second cutting blade 13 expands and contracts the second cutting blade vertical movement cylinder 25 to cut the remaining grain culm at a certain height, and moves the center of gravity position vertical support rod 22 to the center of gravity position longitudinal cylinder 20. On the other hand, the side position vertical support rod 21 is slid up and down with respect to the side position vertical axis cylinder 19, and the lower shaft 33 is moved up and down with respect to the upper axis cylinder 32, so that the second blade 13
Adjust the height position of.

In this case, the second cutting blade frame 23 has the second cutting blade 13
Left and right sensors 40 and 41 are provided for detecting the height position of the rod 46. When the left and right sensors 40 and 41 are slightly in contact with the field scene, the right and left sensors 40 and 41 are switched to the cam surfaces 48 and 49 of the cam portion 50 of the rod 46.
When the mowing unit 4 is moved downward in a neutral state where 51 and 52 are not in contact with each other, the tips of the left and right sensors 40 and 41 come into contact with the upper surface of the field to rotate the horizontal shaft 42, and the horizontal shaft 42 rotates the arm 45. When the arm 45 moves the rod 46 upward and the cam surface 48 of the cam portion 50 of the rod 46 contacts the switch 51, the left and right sensor
Since 40 and 41 are turned on, the second cutting blade vertical movement cylinder 25 is operated to move the second cutting blade 13 upward.

Conversely, the tips of the left and right sensors 40 and 41 separate from the ground and rotate by their own weight to move the rod 46 downward, and the cam surface 49 of the cam portion 50 comes into contact with the switch 52 and turns on. The moving cylinder 25 is extended to move the second cutting blade 13 downward.

In this case, the cutting operation involves cutting only the tip of the grain culm with the first cutting blade 6 and cutting the grain culm left behind in the field with the first cutting blade 6 with the second cutting blade 13 from the root side of the fixed height. When the cutting unit 4 moves upward, the second cutting blade 13 must be moved downward. When the cutting unit 4 moves downward, the second cutting blade 13 must be moved upward. If the lowering movement of the second cutting blade 13 is slow when moving upward, the cutting height of the second cutting blade 13 is higher than expected, and uneven cutting is performed. If the upward movement of the cutting blade 13 is slow, the moving escape cutting blade 13 will rush into the field.

In the present invention, the relationship between the vertical movement speed F1 of the second cutting blade 13 and the vertical movement speed F2 of the cutting unit 4 is F1> F2, and the vertical movement speed of the second cutting blade 13 is higher than the vertical movement speed F2 of the cutting unit 4. Since the speed F1 is controlled so as to be faster, when the cutting unit 4 moves upward, the downward movement of the second cutting blade 13 is faster than the upward movement of the cutting unit 4, so that the second cutting operation is performed. The blade 13 retains its cutting height, and when the cutting unit 4 moves down, the upward movement of the second cutting blade 13 becomes faster than the downward movement of the cutting unit 4, so that the second cutting blade 13 plunges into the field. To prevent

Thus, the left and right sensors 40, 41 are provided with shaft cylinders 43, 43,
The rod 46 is moved up and down via the horizontal shaft 42 and the arm 45,
As a result, the switches 51 and 52 are operated, and the rod 46
Is vertically movably inserted into the vertical support rod 22 at the center of gravity formed by a hollow pipe, so that winding of grass and adhesion of mud to the rod 46 can be prevented, and the rod 46 can be operated accurately. In addition, winding of grass and adhesion of mud to the rod 46 can be prevented, so that poor cutting of the second cutting blade 31 is also prevented.

Also, a switch 51 operated by the left and right sensors 40 and 41,
52 is a center of gravity support rod 22 separated by the left and right sensors 40 and 41.
Since it is provided at the upper end portion, malfunction and failure due to adhesion of mud or the like can be prevented.

(Effects) Conventionally, Japanese Utility Model Application Laid-Open No. 63-4621 discloses a traveling device provided at a lower portion of a traveling frame, a threshing device at an upper portion, and a cutting unit which can move vertically in a forward direction. There is described a combine having a single cutting blade and a second cutting blade, wherein the first cutting blade moves up and down together with the cutting unit, and the second cutting blade moves up and down by a vertical moving cylinder. .

However, the above-mentioned known device does not consider the relationship between the vertical movement speed of the second cutting blade and the vertical movement speed of the cutting unit. Therefore, when the cutting unit moves up, the second cutting blade moves down. Is slow, the cutting height of the second cutting blade is higher than expected, and uneven cutting is performed, and when the cutting unit moves down, if the second cutting blade moves up slowly, the second cutting blade plunges into the field. It will be an accident.

However, according to the present invention, the traveling device 2 is provided below the traveling frame 1 and the above-described threshing device 3 is provided with a cutting unit 4 which can move vertically up and down. The cutting unit 4 has a first cutting blade 6 and a second cutting blade 13. The first cutting blade 6 is configured to move up and down together with the cutting unit 4, and the second cutting blade 13 is configured to move up and down by a vertical moving cylinder 25.
The relationship between the vertical movement speed F1 and the vertical movement speed F2 of the cutting unit 4 is based on the vertical movement device of the second cutting blade of the combine, where F1> F2. Two mowing blades 13
Moves downward, but since the downward movement of the second cutting blade 13 is faster than the upward movement of the cutting unit 4, the second cutting blade 13 can maintain a predetermined cutting height.
When the mowing part 4 moves down, the second mowing blade 13 moves up,
Since the upward movement of the second cutting blade 13 is faster than the downward movement of the cutting unit 4, the second cutting blade 13 is prevented from plunging into the field.

[Brief description of the drawings]

Fig. 1 is a side view of the mowing part, Fig. 2 is a rear view of the same, Fig. 3 is a side view of a main part, Fig. 4 is a rear view of the sensor, Fig. 5 is a side view of the same, and Fig. 6 is an enlarged view. , FIG. 7 is a rear view of the switch, and FIG.
FIG. DESCRIPTION OF SYMBOLS 1... Running frame, 2... Running device, 3... Threshing device, 4... Cutting section, 5... Scraping reel, 6... First cutting blade, 7. …… elevator, 9 ……
Weeding body, 10 …… Auxiliary scraping device, 11 …… Upper rotating shaft, 12…
... Mowing part vertical moving cylinder, 13 ... Second cutting blade, 14 ... Support frame, 15 ... Left end bent part, 16 ... Vertical rod, 17 ... Right end bent part, 18 ... Vertical rod, 19 ... Side position vertical axis tube, 20 ... Center of gravity position vertical axis tube, 21 ... Side position vertical support rod, 22 ... Center of gravity vertical support rod, 23 ... Second cutting blade frame, 24 ... Mounting arm,
25 …… second vertical blade moving blade, 26 …… drive shaft, 27 ……
Drive pulley, 28 gear box, 29 passive pulley, 30 belt, 31 transmission shaft, 32 upper barrel, 33
…… Lower shaft, 34 …… Crank, 35 …… Bell crank, 3
6, 37 ... arm, 38 ... stay, 40, 41 ... second cutting blade height sensor, 42 ... horizontal axis, 43 ... shaft cylinder, 44 ... mounting member, 45 ... arm, 46 ... … Rod, 47 …… Pin, 48, 49
… Cam surface, 50… Cam part, 51, 52… Switch.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-60516 (JP, A) JP-A 63-10836 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01D 34/02-34/40

Claims (1)

(57) [Claims] 1. A cutting device 4 is provided at a lower portion of a traveling frame 1, a traveling device 2 is provided at an upper portion, and a threshing device 3 is provided at a front side of the cutting device 4. The cutting device 4 has a first cutting blade 6 and a second cutting blade. 13 and
The first cutting blade 6 is configured to move up and down together with the cutting unit 4, and the second cutting blade 13 is configured to move up and down by a vertical moving cylinder 25. And the vertical movement speed F2 of the mowing unit 4 is F1
The vertical moving device of the second cutting blade of the combine which is F2.