JPH09205859A - Lock mechanism of handling chamber case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock mechanism which can accurately operate the lock means of a handling chamber case without being disturbed by the power transmission case of a handling drum provided to the handling chamber case. SOLUTION: A threshing machine is constituted by providing the handling drum 3 in an up-down rotatably state so that the handling chamber case 2a pivoted internally between an entrance side plate 20 and an exit side plate has its handling side opened around a fulcrum shaft 6 provided to a lower case 1a as the center of rotation, and fixing the lower part of the handling case 2a so that it can be engaged with and disengaged from a lower case 1a through the lock means at the inner position of a corn straw passing opening 1c. Then the entrance side plate 20 is provided with the power transmission case 4 which rotates and transmits power to the handling drum 3 and a conversion link 7b is provided at the inner upper position of the power transmission case 4; and an operation lever 7s which is coupled with the operation lever 7c is coupled with the conversion link 7b by passing above the power transmission case 4, and the lock means and the conversion link 7b are coupled together through a longitudinal connection lever 7R to engage and disengage the lock means by the operation lever 7c provided on the handling side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism for a handling room case of a thresher that can be mounted on a combine harvester or a harvester.

[0002]

2. Description of the Related Art Conventionally, a handling chamber case in which a handling barrel is internally rotatably mounted between an inlet side plate and an outlet side plate is released from a lock means provided between the lower case and a fulcrum shaft of the lower case. A threshing machine, which is rotated upward so as to open the handling port side as a center of rotation, to perform cleaning and maintenance work in the handling chamber, is known as disclosed in Japanese Utility Model Laid-Open No. 5-6758. Is. The locking means disclosed in the above publication pivotally supports the middle part of the operating lever in the shape of a rod on the inlet side plate of the handling chamber case, while engaging the locking part formed at the other end with the lower case in a protruding manner. It is configured so that it can be engaged and disengaged from the section.

[0003]

However, according to the above construction, since the straight rod-shaped operation lever is connected downward to the locking means through the front side of the inlet side plate from the handle side, the handle barrel is connected. Even in the case of rotation transmission through the transmission case provided on the side plate, the operation lever must be inserted downwards on the front surface of the transmission case and connected to the locking means to engage and disengage the operation lever. There is a drawback that the supplied grain culms come into contact with or get caught and hinder smooth passage and transportation of the grain culm, and when the front surface of the grain culm is covered with a case cover, the case cover protrudes by that amount, so that the space between the inlet plate and There is a problem that the size of the grain culm entrance part formed in the area becomes small.

[0004]

In order to achieve the above object, a lock mechanism for a handling room case according to the present invention is provided with a handling room case in which a handling barrel is internally mounted between an inlet side plate and an outlet side plate in a lower case. With the fulcrum shaft as the center of rotation, it can be rotated up and down so as to open the handling port side, and the lower part of the handling chamber case can be engaged with and disengaged from the lower case at the back side of the grain passage opening through the locking means In the threshing machine to be fixed, the inlet side plate is provided with a transmission case for rotationally transmitting the handling cylinder, while the locking lever is engaged / disengaged by an operation lever provided on the handling port side, a rear upper portion of the transmission case. A conversion link is provided to the conversion link, an operating rod connected to the operation lever is connected to the conversion link through the upper part of the transmission case, and the locking means and the conversion link are connected to each other via a vertical connection rod.

Further, the transmission case is characterized in that the differential ratio type handling cylinder divided in the front-rear direction is rotationally transmitted.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a threshing unit placed on a combine or the like, and a handling chamber 2 of the threshing unit 1 is a handling chamber in which a handling barrel 3 is rotatably mounted between an inlet side plate 20 and an outlet side plate 21. It is formed by a case 2a and a main machine frame (lower case) 1a in which a receiving net 1b is stretched.
Is provided so as to be vertically rotatable around a fulcrum shaft 6 provided on the upper rear side of the lower case 1a as a center of rotation so as to open the handle side, and a grain culm formed between the inlet side plate 20 and the lower case 1a. The lower case 1a is provided at a rear side portion of the supply port (cereal culm passage port) 1c via a locking mechanism of a lock mechanism 7 described later.
It is fixed so that it can be engaged and disengaged.

The handle cylinder 3 is composed of a cylindrical member having handle teeth on its outer peripheral surface. The handle cylinder 3 of this embodiment is divided into front and rear handle cylinders 3a and 3b as shown in FIG. In addition, each of them is a differential ratio type handling cylinder that has a rotation difference and can be rotated independently. Reference numeral 4 denotes a transmission case of the handling cylinder 3 which is attached to the front side surface of the inlet side plate 20 of the handling chamber 2 so as to project from a driven pulley shaft 50 on which a driven pulley 5 is provided. Input this power to gear 5
The rear handling barrel shaft 31 is transmitted at a low speed to the front handling barrel shaft 30 via the gears 2, 53, and the rear handling barrel shaft 31 is transmitted at a high speed via the gears 55 and 56.

In the transmission case 4, the handling chamber case 2a is supported by the fulcrum shaft 6 via the arm 6a so as to be vertically swingable. At any time, the engagement portion 7a which is the engagement means of the lock mechanism 7 is always provided. Is maintained at the normal threshing work position based on the engagement with the lock pin 11 which is the engagement means of the lower case 1a, but in the state where the engagement of the engagement portion 7a is released,
It is retracted and rotated upward together with the handling room case 2a. In this way, by rotating the handling room case 2a upward, the inside of the handling room 3 is opened, and maintenance work of the handling room and the sorting section and the like are easily performed.

The front and lower parts of the transmission case 4 are covered with a case cover 2k.
Is that the transmission case 4 is formed in a vertical width on the front surface of the inlet side plate 20, and the operating rod 7s of the lock mechanism 7 is arranged along the front side plate 20 through the upper side of the transmission case 4. Therefore, the entrance of the wide grain culm supply port 1c is provided between the guide plate 1e of the grain culvert formed on the lower side of the case cover 2k and the inlet plate 1e without being largely projected forward. The part 1k is formed so that the grain culms can be supplied smoothly.

In FIG. 1, reference numeral 8 denotes a relay gear case arranged at a position laterally lower than the transmission case 4, and the relay gear case 8 transmits the power input from the input pulley 80 via a bevel gear or the like. Transmitted to the drive pulley 81,
A transmission belt 8v is suspended between the transmission pulley 81 and the driven pulley 5 to form a belt transmission device, and the relay gear case 8 to the transmission case 4 are formed via the belt transmission device.
Power transmission to Further, the drive pulley 81 rotates counterclockwise when viewed from the front to rotate the transmission belt 8
The left half of v is the tension side and the right half is the slack side. The tension side is guided by the intermediate pulley 60 rotatably provided on the fulcrum shaft 6, while the slack side is the tension pulley 8
It receives the pressing force of T and maintains an appropriate belt tension.

The above-mentioned lock mechanism 7 in the threshing unit 1 is constructed as shown in FIGS. 2 to 4 on the front side surfaces of the lower case 1a and the handling chamber case 2a. That is, the lock mechanism 7 is provided in the lower case 1 at the back side of the grain culm supply port 1c.
A lock piece 70 of an L-shaped link is provided on the front side surface of the inlet side plate 20 of the handling chamber case 2a, in which the lock pin 11 is projectingly provided on a and the engaging portion 7a engages with the lock pin 11 in a detachable manner. An operation lever 7c pivotally supported by a shaft 71 and operable to fix and release the lock piece 70 via a conversion link 7b is provided above the handle 1d on which the feed chain 1F is stretched. The conversion link 7b is rotatably provided on a support shaft 72 provided in the handling chamber case 2a, and the conversion link 7b is rotatably supported downward on a support shaft 73 projecting toward the upper rear side of the transmission case 4. I am letting you.

Further, the operation lever 7c is provided with a connecting pin 74 having a structure shown in FIG. 3 described later and a connecting pin 75 planted in the rear side of the conversion link 7b at the upper portion of the transmission case 4. A connecting pin 76 is provided which is connected to the operating rod 7s which is passed therethrough, and which is planted on the handle side of the conversion link 7b, and a connecting pin 7 which is planted on the lock piece 70.
7R and the connecting rod 7R that is vertically passed through the rear side of the transmission case 4
It is connected by. As described above, the lock mechanism 7
With this configuration, it is possible to dispose the transmission case 4 compactly along the front surface of the front side plate 20 and to bypass the transmission case 4 from the operation lever 7c via the conversion link 7b without being hindered by the transmission case 4. In this state, the lock piece 70 can be accurately operated from the outside of the machine body on the side of the handle 1d with a simple configuration.

Further, as shown in FIG. 3, the operating lever 7 is
c is an inverted L-shaped guide groove 90 formed in the lever guide 9.
It is configured to stably maintain the fixed posture positioned below and the release posture switched to the upper position. That is, the operation lever 7c is rotatably fitted laterally to a vertical support shaft 79a provided on a cylindrical shaft 79 for rotatably fitting the ring portion 7e formed on the base thereof to the support shaft 72. By engaging the other end of a plate-shaped spring 91 that is fixedly supported by the support shaft 72 with the shaft rod of the operation lever 7c, vertical rotation and lateral pressing bias rotation are performed. Operation is allowed. The middle portion of the operating lever 7c is engaged with the long groove formed at the end portion of the operating piece 74a inserted into the shaft end of the support shaft 72, and the middle portion of the operating piece 74a and the operating rod described above are engaged. The end of 7s is connected by a connecting pin 74, and the operating rod 7s is urged downward by a spring 78.

With the above construction, in the fixed posture in which the operating lever 7c is positioned below the vertical groove of the guide groove 90, as shown by the solid line in FIG. Since it is urged, the connecting rod 7R pulls the lock piece 70 through the conversion link 7b, the engaging portion 7a thereof engages with the lock pin 10, and the handling chamber case 2a is accurately fixed and supported by the lower case 1a. Can perform threshing work. At this time, the case cover 2k that covers the front of the transmission case 4 is such that the transmission case 4 is formed in a vertical width and the operating rod 7s of the lock mechanism 7 is passed over the transmission case 4 before By disposing the case cover 7k along the side plate 20, a wide grain culm entrance is provided between the guide surface 2e of the grain culm formed on the lower front side surface of the case cover 7k and the inlet plate 1e without largely projecting forward. Since the portion 1k can be provided, the grain culms can be smoothly supplied in the thresher having the differential rate type handling cylinder.

Further, the operation lever 7 in the state of stopping threshing
When c is rotated upward and locked in the lateral groove of the guide groove 90 (FIG. 4), the operating rod 7s pushes and rotates the conversion link 7b around the support shaft 73 as shown by the dotted line, and the connecting rod 7R is rotated. The lock piece 70 can be pushed and rotated in the same manner to disengage the engaging portion 7a from the lock pin 11 with a simple operation. As a result, the handling chamber case 2a can be pivoted upward about the pivot shaft 6 via the support arm 6b to open the inside of the handling chamber 2 largely, and in this state, an open posture having an appropriate configuration The maintenance device (stay) 15 can be used to maintain the handling chamber case 2a in the upward pivoting posture and facilitate maintenance work. After the maintenance work is completed in this way, the handling chamber case 2a is lowered to its original position, and the operating lever 7c is lowered to engage the lock piece 70 with the lock pin 11 to handle the handling chamber. The case 2a can be fixed and the threshing operation can be favorably performed again.

[0016]

Since the present invention is configured as described above, it has the following effects. According to the invention of claim 1, when the locking means of the handling chamber case is operated by the operating lever provided on the handling port side, the conversion provided at the upper rear side portion of the transmission case via the operating rod passing above the transmission case. By operating the link and engaging and disengaging the locking means with the vertical connecting rod, the locking mechanism can be installed bypassing the front of the transmission case, and the locking means can be operated easily and accurately. In addition, the lock mechanism can be installed and configured without hindering the passage of the grain culm. Further, when a case cover is provided on the transmission case, the grain culm passage opening can be formed without bulging the lower part of the case cover, and the grain culm can be fed and passed satisfactorily.

According to the invention of claim 2, the transmission case provided on the inlet side plate satisfactorily rotationally transmits the differential ratio type handling cylinder, and the case cover covering the transmission case is not largely projected, so that the passage of the grain culms is obstructed. There is nothing to do.

[Brief description of drawings]

FIG. 1 is a sectional view of a thresher having a lock mechanism according to the present invention.

FIG. 2 is a side view showing a main part of FIG. 1;

FIG. 3 is a plan view showing a configuration of an operation lever.

FIG. 4 is a side view of FIG. 3;

[Explanation of symbols]

 1 Threshing Part 1a Lower Case (Main Machine Frame) 1c Grain Feed Port (Grain Passage Port) 1d Handling Port 2 Handling Room 2a Handling Room Case 3 Handling Cylinder 3a Front Handling Cylinder 3b Rear Handling Cylinder 4 Transmission Case 6 Support Point Shaft 7 Lock Mechanism 7a Lock Part (Fixing Means) 7b Conversion Link 7R Connecting Rod 7s Actuating Rod 11 Lock Pin (Fixing Means) 20 Inlet Side Plate 21 Outlet Side Plate 70 Lock Piece

Claims (2)

[Claims] 1. A handling chamber case in which a handling barrel is internally mounted between an inlet side plate and an outlet side plate is provided so as to be vertically rotatable so that the handling port side is opened about a fulcrum shaft provided in a lower case as a rotation center. In a thresher in which a lower part of a handling room case is detachably fixed to a lower case at a rear side portion of a grain culm passage opening through a locking means, a transmission case for rotationally transmitting a handling cylinder is provided on the inlet side plate. In order to engage and disengage the lock means with an operating lever provided on the handle side, a conversion link is provided at an upper rear portion of the transmission case, and an operating rod connected to the operation lever is connected to the conversion link above the transmission case. A lock mechanism for a handling room case, characterized in that the lock means and the conversion link are connected through a vertical connecting rod. 2. The threshing machine according to claim 1, wherein the transmission case rotationally transmits a differential rate type handling cylinder divided in the front-rear direction.