JP3435086B2 - Mowing part structure of reaper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reaper structure of a reaper such as a combine or a binder.

[0002]

2. Description of the Related Art Conventionally, in a mowing section structure of a mowing machine of this type, a plurality of receiving blades and cutting blades are arranged side by side, as disclosed in, for example, Japanese Unexamined Patent Publication No. 10-164952. At the same time, the cutting blade is reciprocally driven to perform a cutting operation in a state of slidingly contacting the cutting blade, and a crank mechanism for reciprocating the cutting blade is provided. It is well known that a weight is provided so that the blade moves in the opposite direction to the reciprocating movement of the blade.

[0003]

However, in such a conventional reaper section structure of a reaper, it is necessary to suppress vibration in the moving direction of the cutting blade in the left-right direction and noise caused thereby. However, since the weight action also works in the left-right direction and in the direction orthogonal to the axial direction of the crankshaft, for example, if the axial direction of the crankshaft is along the front-rear direction, the weight reciprocates in the vertical direction as well. Therefore, there is no structure for canceling the vertical force acting on the crankshaft itself by the vertical movement of the weight. Therefore, a force in the vertical direction due to the weight may act on the crankshaft to vibrate the crankshaft, which may cause noise.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a reaper structure of a reaper capable of further suppressing the occurrence of vibration accompanying the driving of a cutting blade.

[0005]

[Means for Solving the Problems]

(Structure) The characteristic structure of the reaper section structure of a reaper according to claim 1 of the present invention is that a plurality of receiving blades and a cutting blade are arranged side by side, and the cutting blade is slid on the receiving blade. while being in contact reciprocally driven to the left and right configured to cut operation, said cutting blade is provided a crank mechanism for reciprocating the rotational direction of the crankshaft of the click <br/> No. mechanism rotates in the opposite direction the counter shaft which is interlocked with the crankshaft is provided in a state, before
A crank balance weight is provided on the crank shaft, and a counter balance weight is provided on the counter shaft .
When the cutting blade is located at one end of the left and right stroke,
Balance weight for the crank and balance for the counter
The weight is located at the other end of the left and right strokes.
And the cutting blade is positioned at the center position of the left and right strokes.
When installing the crank balance weight and
The balance weight for the unter is the left and right stroke direction.
180 degrees out of phase with each other in the direction orthogonal to
Set the rotation phase of both balance weights so that they are positioned
There are the following points, and the effects thereof are as follows .

(Operation) According to the configuration of claim 1 of the present invention, a counter shaft that rotates in the opposite direction to the rotation direction of the crank shaft for reciprocating the cutting blade to the left and right is provided. Since a counter balance weight for counteracting the lateral movement of the cutting blade is provided on the counter shaft while interlocking with the crank shaft, the inertial force of the balance weight with respect to the crank shaft in the phase opposite to the rotation direction of the crank shaft. As illustrated in FIG. 8A, the counter balance weights 36 are opposite to each other in the vertical direction with respect to the crank balance weight 24 provided on the crankshaft 18 side. by moving in the direction, along with suppressing the occurrence of vibration in the vertical direction of the crankshaft, as illustrated in FIG. 8 (b), the movement in the lateral direction, bar crank Since the Nsu weight 24 and the counter for roses <br/> Nsu weights 36 are in the same rotation phase, the cutting blade 9
Acting as a counterweight to simply crank
This is double that in the case where only the balance weight 24 for use is provided.

(Effect) Therefore, according to the configuration according to claim 1 of the present invention, vibration is less likely to occur with respect to the crankshaft in the direction orthogonal to the lateral movement of the cutting blade, that is, the vertical direction or the front-back direction. , The balance weight for the crank and the coun
What is the balance weight for
Positioned in 180 degrees different phase in orthogonal directions
Since the rotation phase is set so as to cancel the force from the crank balance weight acting on the crankshaft , it is possible to suppress noise generation due to vibration generation on the crankshaft and its durability. This can be increased by suppressing the occurrence of vibration. Also, with the crank balance weight
The balance weight for the counter is the other end of the left and right strokes.
Since the rotation phase is set so that it is located on the side, the action as a counterweight when moving the cutting blade back and forth laterally increases, so it is possible to reduce the weight of the weight. It is possible to suppress the generation of vibrations on the shaft.

(Structure) The reaper section structure of the reaper according to claim 2 of the present invention is the reaper according to claim 1, wherein the crankshaft and the counter shaft are rotationally driven about an axial center extending in the front-rear direction. It is characterized by being configured in.

(Operation) According to the second aspect of the present invention, since the crankshaft and the counter shaft are configured to be rotationally driven around the axial center extending in the front-rear direction, the balance weight has the crankshaft and the counterweight. It functions as a device that can suppress the generation of vibration in the vertical direction with respect to the counter shaft.

(Effect) Therefore, according to the configuration according to claim 2 of the present invention, the occurrence of vertical vibrations in the crank shaft and the counter shaft that are rotationally driven around the front-rear axis is suppressed, Unreasonable noise generation on the crankshaft and counter shaft can be suppressed, and the durability thereof has been improved.

(Structure) The reaper section structure of a reaper according to claim 3 of the present invention is the reaper according to claim 1 or 2, wherein the crankshaft and the counter shaft are concentric with each other via a bevel gear mechanism. It is arranged as a characteristic feature.

According to the third aspect of the present invention, since the crankshaft and the counter shaft are concentrically arranged via the bevel gear mechanism, the counter shaft interlocking with the crankshaft is provided. The arrangement can be made compact.

(Effect) Therefore, according to the configuration according to claim 3 of the present invention, the arrangement of the crank shaft, the counter shaft, and the like can be made compact, so that there is an advantage that the transmission structure to the crank shaft and the like can be simplified. is there.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a combine as an example of a reaper. The combine has a cutting pretreatment device 3 which is vertically swingable around a horizontal axis P at a front end portion of a machine body frame 2 supported by a pair of left and right crawler traveling devices 1, 1.
While installing, the machine frame 2, the threshing device 4,
The boarding operation unit 5, the Glen tank 6 and the like are installed and configured.

The pre-mowing treatment device 3 is divided by the fixed weeding tool 7 and the fixed weeding tool 7 at the front end of the mowing section frame F supported by the machine body frame 2 so as to be swingable around the horizontal axis P. A raising device 8 for raising grass culms, a cutting device 9 for cutting and cutting the root of the raised culms, and a conveying device 10 for merging the cut culms to convey them to the rear threshing device 4. And so on.

As shown in FIGS. 2 to 4, the mowing device 9
Is a cutter blade 12 fixed to a cutter holder 11 mounted over a support frame F1 extending to the front for mounting the fixed weeding tool 7 in the reaper unit frame F.
The cutting blade 13 is slidable to the left and right, and a knife head 15 fixed to the cutting blade 13 via a mounting stay 14. The knife head 15 is composed of a plate material that is bent in a U shape that is open rearward in a plan view, and has a bearing roller 17 that is rotatably supported by the crank mechanism 16 about the front-rear axis X and has an outer diameter. It is designed to fit inside the knife head 15. Crank mechanism 16
Is constructed by welding a cutting blade crank 19 to the tip of a cutting blade drive shaft 18 as a crankshaft, and a bearing roller 17 is rotatably supported on the cutting blade crank 19.

As shown in FIGS. 2 and 3, the cutting blade 13 and the mounting stay 14 are integrated by a rivet or the like with a slider 20 as a knife bar slidingly contacting the rear end surface of the receiving blade 12. A slicing plate 22 which is tightened and fixed together with a knife clip 21 for holding 13 is slidably brought into contact with a rear end surface of the slider 20 so that the cutting blade 13 is positioned vertically and vertically and slidably moved only left and right. ing.

A concave portion 23 into which the knife head 15 enters the front is formed at the rear edge of the receiving blade 11, and the bearing roller 17, that is, the cutting blade crank 19 is arranged to enter into the concave portion 23. . Further, the axis Q of the cutting blade drive shaft 18 is located substantially at the center of the upper and lower sides of the knife head 15.

The cutting blade crank 19 is formed in a disk shape having a weight portion 24 bulging in the axial direction on the side opposite to the bearing roller 17 mounting portion with respect to the rotary shaft core Q. It also functions as a balancer that reduces vibrations caused by the rotation of 19 and as a flywheel that smoothes load fluctuations caused by rotation.

Next, the transmission structure to the reaping device 9 will be described. As shown in FIG. 3, the transmission shaft 25 from the upper side of the raising device 8 is installed in a forwardly inclined transmission case 26,
A lower portion of the transmission shaft 25 is supported by a lateral transmission case 27 as a bearing. Incidentally, the transmission case 26 supports the scraping rotary member 10a and the like for scraping the cut grain culm backward. A small-diameter bevel gear 28 is integrally provided at the lower end of the transmission shaft 25 which faces the lateral transmission case 27. A second small diameter bevel gear 29 that meshes with the small diameter bevel gear 28 is provided integrally with the cutting blade drive shaft 18. Therefore, the cutting blade drive shaft 1
The power to the drive shaft 8 is linked to the power transmission to the raising device 8.
5, and the reaper 9 is reciprocally driven.

Then, as shown in FIG. 2 to FIG.
A first large-diameter bevel gear 30 that rotates integrally with the cutting blade drive shaft 18 is provided at a position closer to the mowing device 9 than the small-diameter bevel gear 29. As shown in FIG. 4, the second large-diameter bevel gear 31 that meshes with the first large-diameter bevel gear 30 is provided so as to rotate integrally with the lateral transmission shaft 32 supported by the lateral transmission case 27. Furthermore, the second large-diameter bevel gear 31
The third large-diameter bevel gear 33 that meshes with is provided so as to rotate integrally with the counter shaft 34 that is driven to rotate coaxially with the cutting blade drive shaft 18. The counter shaft 34 has one end side fitted to the small diameter portion of the end of the cutting blade drive shaft 18 so as to be freely rotatable,
The other end is supported by the lateral transmission case 27 in a state of extending outward. A balance weight 35 for counter balance is provided at a portion extending outward of the counter shaft 34.
Is provided so that it can rotate integrally. This balance weight 3
Reference numeral 5 indicates a rotating body which is rotated in the opposite direction to the rotating direction of the cutting blade drive shaft 18, is formed in a disk shape like the cutting blade crank 19, and is a weight biased with respect to the counter shaft 34. A section 36 is provided. Furthermore, FIG.
As illustrated in principle in (a), the balance weight 3
When the cutting blade 9 is in the middle of the right and left reciprocating motion, the weight portion 36 in FIG. 5 and the weight portion 24 of the cutting blade crank 19 have an upside down positional relationship about the axis Q. In addition to the above, the weight portion 36 is set to the same position side in the vertical direction with respect to the bearing roller 17 while rotating in the reverse direction. Then, as illustrated in principle in FIG. 8B, at the moment when the cutting blade 9 reaches the end portion of the left-right reciprocating motion, the weight portion 24 of the cutting blade crank 19 and the weight portion 36 of the balance weight 35. And are on the same side in the left-right direction, and are set so as to move in the opposite directions in the vertical direction, and with respect to the bearing roller 17,
The left and right directions are set to be opposite to each other. By providing the weight portion 36 of the balance weight 35 in this manner, when the bearing roller 17 moves downward or upward with respect to the knife head 15, the bearing roller 17 moves in the vertical direction opposite to the weight portion 24 of the cutting blade crank 19. Similarly, the weight portion 36 of the balance weight 35 also coincides with the bearing roller 17 with respect to the vertical movement, so that the balance weight 35 has the cutting blade crank 19 with respect to the cutting blade drive shaft 18 that is coaxial with the counter shaft 34. The vertical force acting on the cutting blade drive shaft 18 of the balance weight 35 and the weight portion 24 of the cutting blade crank 19 cancels each other out. In this state, vibration of the cutting blade drive shaft 18 is suppressed. On the other hand, since the balance weight 35 and the weight portion 24 of the cutting blade crank 19 move in the same direction in the left-right direction, the load variation in the left-right direction due to the rotation of the balance weight 35 and the cutting blade crank 19 is caused. The smoothing function as a flywheel acts as a double on the cutting blade 9 compared to the case where only the cutting blade crank 19 is provided.

[Brief description of drawings]

FIG. 1 is an overall side view showing a combine.

FIG. 2 is a plan view showing a reaping device.

FIG. 3 is a vertical sectional side view showing a main part.

FIG. 4 is a cross-sectional plan view showing a main part.

FIG. 5 is a perspective view showing a balance weight.

FIG. 6 is a perspective view showing another balance weight.

FIG. 7 is a vertical sectional front view showing an eccentric drive mechanism.

FIG. 8 is a perspective view schematically showing a cutting blade, a crank mechanism, and a balance weight, showing a state in which the cutting blade is being moved to the left (a) and a state in which the cutting blade has reached the left end (b). Show

[Explanation of symbols]

12 blades 13 cutting blade 16 crank mechanism 18 crankshaft 27 Bevel gear mechanism 36 counter axis 38 Balance Weight

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Kishimoto 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Corporation Sakai Plant (56) References JP 10-164952 (JP, A) JP 1- 164835 (JP, A) JP 58-77950 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01D 34/02-34/408 F16F 15/26

Claims (3)

(57) [Claims] 1. A plurality of receiving blades and cutting blades are arranged side by side, and the cutting blades are reciprocally driven to perform a cutting operation while slidingly contacting the cutting blades.
Wherein the cutting blade is provided a crank mechanism for reciprocating a counter shaft which is interlocked with the crankshaft in a state rotated in the opposite direction is provided to the rotational direction of the crankshaft of the clan <br/> click mechanism, said click
A crank balance weight is provided on the rank shaft, and a counter balance weight is provided on the counter shaft.
If the cutting blade is located at one end of the left and right stroke,
Crank balance weight and counter balance weight
So that it is located at the other end of the left and right strokes.
And the cutting blade is located at the center position of the left and right strokes.
When using the balance weight for the crank and the cow
Balance weight for the center
Are 180 degrees out of phase with each other in the orthogonal direction.
Set the rotation phase of both balance weights so that
The structure of the reaper's reaper. 2. The reaper section structure of a reaper according to claim 1, wherein the crank shaft and the counter shaft are configured to be rotationally driven around an axis along the front-rear direction. 3. The reaper structure of a reaper according to claim 1, wherein the crank shaft and the counter shaft are concentrically arranged via a bevel gear mechanism.