JPH0353628Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention is based on an upper conveyor rotor installed above the cutting blade that rotates around a vertical axis, which can be repositioned and fixed in the left and right directions of the machine body as necessary. The present invention relates to an improvement in a device for changing and adjusting the position of the upper conveying section in a rotary mower configured to appropriately guide the left or right discharge of the cutting culm.

(Prior art) In a rotary mower configured to cut and harvest the base of a planted grass stem culm with a cutting blade that rotates around a vertical axis, if the plant height of the grass stem culm to be cut is long, the cutting blade An upper conveying rotor is installed at an appropriate upper position to engage and convey the portion near the tip of the grass stem culm, so that the long grass stem culm is forcibly conveyed in the discharge direction.

By the way, the conventional conveyor rotor mentioned above is
If the mounting part of the transport rotor is fixed to the mounting seat on the machine body using a fastening fixture, and the position of the transport rotor is to be changed, first unfasten the fastening fixture and place the transport rotor in its place. Since the position can be changed by moving the rotor to the initial position and tightening the fastening fixture again, the installation and fixation of the transport rotor is strong, but each time a change or adjustment is to be made, the reaping operation must be stopped and the change made. There was a problem that continuous reaping work could not be carried out because of the lack of water, resulting in a decrease in work efficiency.

(Purpose of the invention) The purpose of the invention is to be able to change and fix the position of the conveying rotor as necessary while continuing the reaping operation, and to solve the problems of the conventional device described above. An object of the present invention is to provide a position change adjustment device for an upper conveyance rotor, which allows a position change operation to be accurately performed with a single lever without any erroneous operation, and which can be reliably fixed at a desired position.

(Structure of the invention) The present invention is capable of changing the position of the entire upper conveyor rotor in the left-right direction of the aircraft by the rocking motion of the drive case that swings around the input shaft, and the drive case and the switching lever at the control hand are connected to each other. The actuator is connected by an interlocking rod so that it can be operated by operating the switching lever, and also drives an actuator that is linked to the movement of the switching lever in the direction of engaging and disengaging from the locking groove of the guide groove on the guide plate of the switching lever. The drive case is connected to a lock mechanism for fixing the case at a predetermined adjustment position, and the lock mechanism is engaged and disengaged by movement of the switching lever in a direction different from the direction in which the drive case is swung left and right.

(Example) An example of the present invention is illustrated in the accompanying drawings, and will be described below with reference to the drawings.

FIG. 1 is an overall side view of a rotary mower according to the present invention, FIG. 2 is an enlarged side view of the main parts thereof, and FIG. 3 is a plan view of the structure of the main parts in FIG. 2.

The rotary mower shown in Fig. 1 has a reaping part C installed at the front of a machine body 3 that moves by the rotation of drive wheels 2 interlocked with an on-board engine 1, and extends rearward from the machine body. Control handle 4
The machine is constructed so that operations necessary for operating the machine and various operations necessary for reaping work can be carried out at the control part of the machine.

The reaping section C has a vertically rotating reaping blade 5 attached to a reaping drive shaft that is vertically installed downward from a reaping transmission case (not shown in the figure) installed at the front of the machine. It consists of a PTO shaft extending upward from the transmission case.

The reaping transmission case is configured to receive input from the installed engine 1, and is connected to the reaping drive shaft.
It is configured so that the rotation of the PTO shaft can be changed between forward and reverse directions by an integrated switching operation at the operator's hand.

An upper conveyance rotor A is detachably mounted above the reaping section 4 as required. The rotary conveying body 10 with conveying protrusions 9 is attached to the output shaft 8 of the rotary conveying body 10.

The drive case 7 is pivotally supported by the body 3 so as to be horizontally rotatable about the axis O of the input shaft 6 with the input shaft 6 interlockingly connected to the PTO shaft.

A mounting portion 11 is installed in a portion of the drive case 7 that is appropriately eccentric laterally from the axis O of the input shaft 6, and the tip of the interlocking rod 12 is pivotally connected to the mounting portion, and the rear of the interlocking rod 12 is connected to the mounting portion 11. The other end of the extension is swing arm 1
It is pivotally connected to the tip of 3.

The swinging arm 13 has its base boss 14 connected to a pivot shaft 17 that stands up from the bottom plate 16 of the operation guide box 15.
It is rotatably fitted and installed.

An actuating arm 18 is integrally protruded from the base boss 14 in a direction different from that of the swinging arm 13, and a horizontal rotation shaft 19 at the tip of the actuating arm swings the base of the switching lever 20 in the vertical direction. It is possible and connected.

The switching lever 20 extends rearward by passing through a guide groove 22 in an operation guide plate 21 installed on the rear surface of the operation guide box 15, and is provided so that it can be held and operated at the operator's hand.

The guide groove 22 in the operation guide plate 21 is formed by continuously providing a locking groove at a stroke end portion and an intermediate portion of the guide groove that guides the operation of the switching lever 20 in the left-right direction, and the switching lever is moved along the guide groove portion. When in operation, the drive case 7 can be swung left and right around the axis O via the swing arm 13 and the interlocking rod 12, and when the switching lever is locked in one of the locking grooves, The driving case 7 is configured so that it can be positioned at either a left position P1, a right position P2, or an intermediate position PO.

In addition, an actuator mounting part 23 is installed in a part of the switching lever 20, and the mounting part 23 is provided with a push/pull function that moves in conjunction with the movement of the switching lever 20 between the guide groove part and the locking groove part. The operating tool 24 to be operated is connected.

In this embodiment, the actuating tool 24 is formed of a Bowden wire, and the other end thereof is extended forward and connected to the locking rod 25 of the locking mechanism R so that it can move forward and backward.

The locking mechanism R includes the locking rod 25, which is supported so as to be movable forward and backward by support parts 26 and 27 installed on the lower surface of the drive case 7, and is elastically biased in the advancing direction by a compression spring 28. It is fixed to the fuselage side by a mounting stage 29, and holes 30, 30, and 30 are bored in positions corresponding to the left side position P1, right side position P2, and intermediate position PO, respectively, with which the locking rod tips engage. The compression spring 28 needs only a light elastic biasing force to prevent the locking rod 25 from coming out from the hole 30 when not operated, and this elastic biasing force is applied to the switching lever 20 It also works to fit into and maintain the locking groove portion of the guide groove 22.

In addition, 32 is a bolt for removably fixing the operation guide box to the upper surface of the base of the operating handle;
3 and 34 are stays for supporting a cover 35 that covers a portion of the drive case in the lower part of the rotary conveyance body.

Next, the operation of the embodiment device will be explained.

When the height of the cut grass stem culm is long, an upper conveying rotor A is installed above the reaping part C, and the upper part of the grass stem culm is forcibly transferred in the discharge direction by the rotation of the rotor. In this case, the operation guide box 15 is fixed and attached to the upper surface of the base of the operating handle 4 with bolts 32, and the input shaft 6 of the drive case 7 in the upper transport rotor A is attached.
is coupled to the input shaft of the reaping transmission case, and the drive case 7 is pivotally mounted on the machine body side.

Therefore, when mowing work is performed while releasing the mowing culm to the right side of the machine, by moving the switching lever 20 from the locking groove of the guide groove 22 to the guide groove part, the switching lever 20 can be moved up and down around the rotation shaft 19. As the actuating tool 24 is pulled in this direction, the locking rod 25 associated therewith is retracted against the compression spring 28, and the engagement between the rod 25 and the hole 30 is disengaged. The drive case 7 is in a state where it can swing from side to side about the axis O. Then, if the switching lever 20 is moved to the right in the guide groove part of the guide groove 22, the lever 20 turns about the axis 17 and swings. Arm 1
3. The interlocking rod 12 is pulled and actuated to swing the drive case 7 to the right position in FIG. In other words, the drive case 7 is swung in the same direction as the horizontal operating direction of the switching lever 20.

When the drive case 7 is located at the right position P2, the switching lever 20 is exactly in the position corresponding to the locking groove on the right side, so if you let go of the switching lever at that position, the return force of the compression spring 28 will cause the switching lever 20 to move. The locking rod 25 moves forward from the retracted position and locks the locking plate 31.
The actuating tool 2 engages with the hole 30 located at the right position P2 of
With the movement of step 4, the switching lever 20 enters the locking groove from the guide groove and is securely locked by the force of the compression spring 28 so as not to come off, and the entire upper conveying rotor A is kept fixed at the right side discharge operating position. That will happen.

Therefore, if the cutting transmission case is switched so that the cutting blade 5 and the rotary transport body 10 operate clockwise and the machine is moved forward, the base of the grass stem culm to be planted will be moved by the cutting blade 5. At the same time, the upper part of the grass stem culm was transferred to the transport protrusion 9, and despite the long height of the plant, it was thrown out to the right side of the machine. It is.

In addition, if it is necessary to reap while discharging the reaping culm to the left side of the machine, move the switching lever 20 to the left in the opposite direction to the above and fit it into the locking groove at the left stroke end. Due to the movement, the lock mechanism R is disengaged, the drive case 7 is swung, and the lock mechanism is engaged and disengaged accurately, quickly, and with light operating force without malfunction, and the upper conveyance rotor can be changed to the ejecting position on the left side of the machine. Furthermore, even when setting the upper conveyance rotor to the center position of the machine, the change can be easily made by operating the switching lever in the same way as described above, and it can be reliably maintained at a predetermined position.

(Effects of the Invention) As described above, the present invention provides a rotary mower in which the upper conveying rotor A is installed above the cutting blade 5 that rotates about the vertical axis and is adjustable in position in the left-right direction of the machine. The conveyance rotor A can change its position by swinging its drive case 7 around the input shaft 6, and can change its swing by means of an interlocking rod 12 linked to a switching lever 20 installed at the operator's hand. An actuating tool 24 that is linked to the movement of the switching lever in the direction of engaging and disengaging the locking groove portion of the guide groove 22 in the operating guide plate 21 of the switching lever is connected to the locking mechanism R, which is different from the direction in which the drive case is swung left and right. Since the lock mechanism is configured to be engaged and disengaged by movement of the switching lever in this direction, there are the following advantages.

Reaping work is performed by adjusting and changing the position of the upper conveyor rotor in the left and right directions of the machine, but changing and fixing the position can be easily carried out by operating the switching lever at the operator's hand, so you can easily change the position while continuing the work. It can be adjusted quickly and the mowing work can be carried out efficiently.

Regardless of whether a single switching lever is used to change the position of the upper transport rotor and to fix it in a predetermined position, when the switching lever is operated, the locking mechanism R must be released and the drive case 7 must be swung. , locking mechanism R is configured to operate in the order of locking, so the operation is simplified and easy without causing any malfunction.

At the same time, the switching lever 20 is fitted into the locking groove of the guide groove 22 with the force used to maintain the locking mechanism R in the locking position, so the structure for maintaining the position is simple, and locking and fixing can be prevented unexpectedly. This can be done in a reliable state where no disconnection or the like will occur.

The force for keeping the locking mechanism R in the locked position and the force for keeping the switching lever 20 in the locking position by fitting it into the locking groove part of the guide groove 22 need only be light enough to maintain the position. The force becomes small.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a rotary mower according to an embodiment of the present invention, Fig. 2 is an enlarged partially cutaway side view of the main parts of the rotary mower, and Fig. 3 is a part of the main parts in Fig. 2. FIG. 5...Mowing blade, 6...Input shaft, 7...Drive case, 12...Interlocking rod, 20...Switching lever, 21
. . . operation guide plate, 22 . . . guide groove, 24 . . . actuation tool, A .

Claims (1)

[Scope of utility model registration request] In a rotary mower configured such that an upper conveyance rotor A is installed above a cutting blade 5 that rotates around a vertical axis and can be freely adjusted and fixed in position in the left-right direction of the machine, the upper conveyance rotor A connects its drive case 7 to an input shaft 6. The position can be changed by swinging at the center, and the swing can be changed using the interlocking rod 12 linked to the switching lever 20 installed at the operator's hand.
Guide groove 22 of the operation guide plate 21 of the switching lever
An actuating tool 24 that is linked to the movement in the direction of engaging and disengaging the switching lever 20 is connected to the locking mechanism R with respect to the locking groove provided in the locking groove, and the movement of the switching lever in a direction different from the direction in which the drive case is swung left and right is connected to the locking mechanism R. A position changing device for an upper conveyance section, characterized in that the switching lever is engaged with and disengaged from the locking groove of the guide groove 22, and the locking mechanism is engaged and disengaged.