JPH0675103U - Rotary stand equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] In a rotary tilling device having a rear cover that can change the pivoting position back and forth behind the tiller, a lower end of the rear cover and the tiller without using a tail wheel or a separate stand. The rotary tiller can be supported by grounding the tip of the. In a rotary cultivating device having a rear cover capable of changing the pivoting position back and forth behind a cultivating claw, a lateral pin is detachably attached to a shaft supporting an upper part of a suspension rod for suspending the rear cover. Then, a hole into which the pin is fitted is provided on the upper part of the suspension rod, and the pivot position of the rear cover is moved rearward, and the suspension rod is lowered,
A pin was fitted into the hole of the suspension rod and fixed, and the lower end of the rear cover and the tip of the tilling claw were grounded so that the rotary tiller could be supported.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary stand device for a work machine attached to a walk-type cultivator or a riding-type agricultural tractor.

[0002]

[Prior art]

 The rotary cultivator of the work implement attached to the walk-type cultivator or the riding-type agricultural tractor should be removed from the cultivator or the agricultural tractor main unit when performing other agricultural work other than the rotary cultivating work, and other auxiliary work. Although it is necessary to replace it with a machine, the rotary cultivator usually has a structure that is unstable for stationary, and in the past, a solid toolbar was installed on the upper part of the rotary and the rear end part was installed. In this state, a tail wheel or stay is vertically movably mounted, and with the tail wheel or stay extended to its maximum length, the tip of the tilling claw is grounded to support the rotary tiller. In addition, a separate stand was used for a rotary that does not have a tail wheel or stay.

[0003]

[Problems to be solved by the device]

 As in the past, a solid toolbar was provided on the upper part of the rotary, and a tail wheel or stay was attached to the rear end of the rotary tool so that it could be moved up and down. Therefore, in the case of supporting the rotary cultivator, unnecessary parts are mounted during the cultivating work, which not only increases the cost but also removes the parts during the cultivating work and stores them in another place, so Sometimes it could get lost. Also, in the case of using a stand, it has to be manufactured separately, which increases the cost and is troublesome to carry.

[0004]

[Means for Solving the Problems]

 The present invention relates to a rotary cultivating device having a rear cover that can change the pivoting position back and forth behind the cultivating claw, and a lateral pin can be inserted into and removed from a shaft that supports an upper portion of a suspension rod that suspends the rear cover. A hole into which the pin fits in the upper part of the suspension rod, and the pivot position of the rear cover is moved rearward, and the pin is fitted into the hole of the suspension rod with the suspension rod lowered. The above-mentioned problem was solved by supporting the rotary tiller by holding the rear tiller and the lower end of the rear cover and the tip of the tiller on the ground.

[0005]

[Action]

 When detaching the rotary cultivator from the cultivator or the agricultural tractor body and replacing it with another accessory work machine and mounting it, after moving the pivot position of the rear cover backward, with the suspension rod lowered, The rotary tiller can be stably supported by inserting the pin into the hole provided in the upper portion of the suspension rod and fixing the pin, and grounding the lower end of the rear cover and the tip of the tilling claw. Further, when the pin is removed from the hole provided in the upper portion of the suspension rod during the tilling work and the fixing of the length of the suspension rod is released, the rear cover moves up and down according to the working depth.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Lower links 2 are attached to the left and right rear portions of a transmission 1 of an agricultural tractor, and are connected to an upper lift arm 3 by a lift rod 4 so that they can be rotated up and down. The top link support 5 that is installed and is opened rearward is attached to the center of the rear surface of the transmission 1. The top link support 5 supports the hitch assembly 7 through the top link 6, and the lower part of the hitch assembly 7 is mounted. Is supported at the tip of the lower link 2 to form a three-point link to support the rotary cultivator 9, and the power from the PTO shaft projecting at the lower center of the rear surface of the transmission 1 is passed through the yoke joint 8. It is transmitted to the rotary tiller 9 side.

On the upper part of the rotary tiller 9, a top mast 10 composed of two plates is fixed to a gear case 11 in the center, and a pin portion connecting the tips of the top mast 10 is directed to the upper rear of the hitch assembly 7. The left and right lower connecting pins, which are supported by engaging the open support grooves and fixed to the side of the gear case 11 at the bottom, are located behind the lower connecting plates 7a, 7a fixed on both lower sides of the hitch assembly 7. It is supported by being engaged with a support groove that is open toward, and is supported by a three-point link of the tractor body.

The power transmitted to the gear case 11 via the yoke joint 8 drives the cultivating shaft via the side chain case 12 to rotate the plurality of cultivating claws 15 fixed to the cultivating shaft. On the other hand, the rotary cover 13 covering the tillage claws 15 is fixed to the structure such as the gear case 11 and the chain case 12, and the rear cover 14 is provided on the upper surface of the rotary cover 13 at the rear of the rotatable rail 16 which is movable back and forth. It prevents the scattering of pivoted and cultivated soil and acts as an equalizer for crushed soil.

An electric cylinder 17 is axially supported between the top mast 10 and the rotary rail 16, and when the working depth is set by a tilling depth setting device provided in the operating section, the electric cylinder 17 is expanded and contracted. The pivoting rail 16 is moved back and forth, and thereby the rear cover 14 is moved up and down.

On the other hand, two left and right brackets 18 are fixedly mounted on the rear end of the rotary rail 16, and a horizontal shaft 19 fixed through the brackets 18 suspends vertically. A rod 20 is slidably mounted so that the lower end of the suspension rod 20 is connected to a bracket projecting from the rear cover 14. 21 is a nylon collar 21. Furthermore, a cushioning rubber 22 is interposed between the upper end and the receiving metal fitting 20a to cushion the shock when the length of the suspension rod 20 is maximized. Further, in the middle portion of the suspension rod 20, lower springs are fixed and upper springs are provided with loose spring receivers 23 and 23a, and a spring 24 is interposed between them.

The shaft 19 is provided with a hole 19 a in the lateral direction, and a pin 25 in the lateral direction is attached to the hole 20 b provided in the upper portion of the suspension rod 20 by a wire 26 so as to be insertable and removable. ing. The pin 25 is directly connected to the inner cable 27 of the wire 26, but between the spring seat 28 fitted in the groove of the intermediate portion of the pin 25 and the outer cable fixed to the inner diameter of the hole 19a by the fixing ring 29. In addition, the spring 30 is interposed, and the tip of the pin 25 is always urged in the direction in which it is pressed against the suspension rod 20.

The other end of the wire 26 is connected to a link 31 which is rotatably supported on the side surface of the front top mast 10, and a return spring 32 mounted on the rotating shaft always causes the inner portion of the wire 26 to be in contact. The cable 27 is biased in the pulling direction to eliminate the looseness of the wire 26. The counterclockwise rotation of the link 31 is restricted by the stopper 33.

Hook plates 34 for connecting and locking the pins 11a on the rotary tilling device 9 side are mounted on the lower left and right of the hitch assembly 7, and a handle is provided above the connecting member 34a for connecting the left and right hook plates 34. An operation lever 35 is fixed to a position just on the center line of the width of the rotary tiller 9, so that the left and right hook plates 34 can be operated with uniform force. A guide bar 35a is provided in the middle portion of the operation lever 35 so as to project laterally toward the center, and is guided by an L-shaped guide hole provided in the upper connecting plate 36 of the hitch assembly 7 to guide the operation lever 35 to the guide. When the hook plate 34 is operated up and down along the groove, the hook plate 34 is turned up and down. A spring 37 is provided between the middle portion of the guide bar 35a and the lower center of the upper connecting plate 36, and the guide bar 35a is pulled into the lower rear end of the L-shaped guide groove to maintain the locked state. There is.

When the rotary tiller 9 is installed, the guide bar 35a abuts the lower surface of the link 31, and the operating lever 35 is pushed downward to lock the hook plate 34, and the L-shaped guide is provided. When the guide bar 35a is fixed to the horizontal portion of the hole, the inner cable 27 is pulled by the urging force of the return spring 32, the pin 25 is disengaged from the hole 20b, and the fixation to the hanging rod 20 is released. The suspension rod 20 can be freely expanded and contracted, and the rear cover 14 can also be freely moved up and down according to the working depth, so that the proper tilling state can be achieved.

When the rotary tiller 9 is removed, the rear cover 14 is moved rearward and downward when the rotary rail is rotated backward by the electric cylinder 17, so that the suspension rod 20 is lowered and at the lowest position. When the operation lever 35 is once moved forward to lower the guide bar 35a along the vertical portion of the L-shaped guide hole and then pulled up, the hook plate 34 pivots upward and the lock is released. In this state, since the lower surface of the link 31 is released from the restraint of the guide bar 35a, the urging force of the spring 30 overcomes the urging force of the return spring 32, and the link 31 is rotated counterclockwise until it hits the stopper 33. The inner cable 27 is extended, the pin 25 is fitted into the hole 20b, and the suspension rod 20 is fixed in the longest state. At this time, since the rear cover 14 is also positioned at the lowermost position and is fixed, if the ground is gently touched, the rotary tiller 9 can be supported by the tip of the tilling claw 15 and the lower end of the rear cover 14, and a specific stand can be supported. No longer need. Almost at the same time, the lower connecting pin comes out of the groove of the lower connecting plates 7a, 7a, and when the hitch assembly 7 is further lowered, the supporting groove of the upper connecting plate 36 comes out of the pin portion.

FIG. 5 shows another example of inserting and removing the pin 25. An electromagnetic valve V is attached to the end of the shaft 19 on the hole 20b side, and the electromagnetic valve V is turned on by connecting to the pin 25. , OFF, the pin 25 is inserted and removed. FIG. 6 shows another example of the top mast support device, which is provided with an input shaft cover 38 that surrounds both side surfaces of the gear case 11 and the upper three sides thereof, and has a U-shape in plan view on its upper surface. Since the supporting frame 39 to be formed is screwed and the top mast 10 is welded to both side surfaces of the supporting frame 39, the structure is not deformed even when a load is applied in the front-rear direction, and the overall structure is strong.

[0017]

[Effect of device]

 The present invention relates to a rotary cultivating device 9 having a rear cover 14 capable of changing a pivoting position back and forth behind a cultivating claw 15 in a lateral direction on a shaft 19 which supports an upper portion of a suspension rod 20 suspending the rear cover 14. State in which the pin 25 of the rear cover 14 is removably mounted, a hole into which the pin 25 is fitted is provided in the upper portion of the suspension rod 20, the pivot position of the rear cover 14 is moved rearward, and the suspension rod 20 is lowered. Then, the pin 25 is fitted and fixed in the hole of the suspension rod 20 and the lower end of the rear cover 14 and the tip of the tilling claw 15 are grounded, so that the rotary wheel can be used without using a tail wheel or a separate stand. The tiller could be made supportable.

[Brief description of drawings]

FIG. 1 is a side view of a state in which a rotary tiller is removed from a hitch assembly.

FIG. 2 is a side view showing the same as above.

FIG. 3 is a vertical sectional view of a suspension rod locking portion.

FIG. 4 is a rear view of the hitch assembly.

FIG. 5 is a cross-sectional view of another example of the suspension rod locking portion.

FIG. 6 is a front view of another example of the top mast attachment portion.

[Explanation of symbols]

 1 Transmission 7 Hitch Assy 9 Rotary Tilling Device 10 Top Mast 14 Rear Cover 15 Tilling Claw 20 Suspension Rod 25 Pin 26 Wire 35 Operation Lever

Claims (1)

[Scope of utility model registration request] 1. A rotary tiller 9 having a rear cover 14 which can change its pivotal position back and forth behind a tiller 15 in a rotary tiller 9 which laterally extends on a shaft 19 which supports an upper portion of a suspension rod 20 for suspending the rear cover 14. Pin 25 is detachably mounted, a hole into which the pin 25 is fitted is provided in the upper part of the hanging rod 20, the pivot position of the rear cover 14 is moved rearward, and the hanging rod 20 is lowered. A pin 25 is fitted into the hole of the suspension rod 20 and fixed, and the lower end of the rear cover 14 and the tip of the tilling claw 15 are grounded so that the rotary tiller 9 can be supported. .