JP2505442Y2 - Tractor tilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a tractor tilling device in which a rotary tiller working machine is installed behind a tractor via a link mechanism.

[Prior Art] Conventionally, as shown in Japanese Utility Model Laid-Open No. 58-83207, there is a technique of providing an extension rear cover on both sides of the rear cover so that it can be moved back and forth. There has been a technique in which an extension plate is provided and the extension plate is moved back and forth to a working position or a non-working position in association with lifting and lowering of a tilling work machine.

[Problems to be solved by the invention] In the conventional technology, the extension plate is connected to the lift arm of the tractor that raises and lowers the tiller by a wire, and the extension arm is retracted by pulling the wire by the lifting operation of the lift arm. When attaching / detaching the tiller to / from the tractor, the wire connecting the extension plate to the lift arm also needs to be attached / detached, which makes it difficult to simplify the attachment / detachment of the implement and lowers the tiller. Since the working machine is moved up and down within a predetermined range by adjusting the tilling depth at the tilling position, the tiller working machine supporting position where the extension plate is retracted by the lifting operation of the lift arm is likely to be high, and the tiller is located at a low position near the ground. When the work implement is supported, the extension plate is supported at the advanced position even if no plowing work is performed.
Therefore, when lifting the tiller to a low position near the ground, the turning outer diameter of the machine does not become small, and it is necessary to lift the tiller to a higher position when changing the direction in the field headland. There was an operational problem.

[Means for Solving the Problems] Therefore, according to the present invention, a cultivating implement is provided at the rear of a tractor via a link mechanism so as to be able to move up and down, and a rear cover that covers the rear side of the tilling claw of the implement is provided so as to be able to move up and down. A hanger rod for elastically supporting the ground is installed to move the hanger rod forwards and backwards in conjunction with the raising and lowering movement of the rear cover, and extension rear covers can be extended to the left and right side parts of the rear cover to extend or retract to the working position or the retracting non-working position. In the tiller of the tractor to be connected, a connecting member for interlocking the forward / backward movement of the hanger rod with the forward / backward movement of the extended rear cover is provided, and the extended rear cover is used as the forward spring based on the forward movement of the hanger rod that detects the downward movement of the rear cover. It is characterized in that it is configured to automatically move in and out.

"Operation" Therefore, it is not necessary to connect the extension rear cover to the tractor main unit side, so when detaching the cultivator from the tractor, the conventional wire attachment / detachment work is not required, simplifying the tractor attachment / detachment work. When the tilling implement is lifted to a height at which the rear cover is separated from the ground, the extension rear cover retracts due to the lowering of the rear cover. In this case, the extended rear cover can be automatically retracted, and when the tilling implement is not lifted to a high position as in the conventional case, such as when changing the direction in the field headland, the extended rear cover can be retracted to allow the turning outer diameter of the machine to be changed. It is possible to reduce the number of turns, raise the tiller to a lower position near the ground and change the direction, and simplify the handling operation such as turning operation in the field headland. .

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings. 1 is an operation explanatory view of an extended rear cover, FIG. 2 is a side view of a tractor equipped with a rotary working machine, FIG. 3 is a side view of a rotary working machine in a lowered state, and FIG. 4 is a rotary working machine in a raised state. 5 is a side view of the rotary working machine, FIG. 5 is a plan view of the rotary working machine, in which (1) shows a tractor, and (2) and (3).
Is a front and rear wheel, (4) is a chassis for mounting the front wheel (2),
(5) is an engine mounted on the chassis (4), (6) is a power transmission case that is connected to the engine (5) and is equipped with rear wheels (3), and (7) is integrally formed with a steering (8) The rear wheel (3) mud cover, (9) is the mud cover (7)
A driver's seat provided between them, (10) is a steering wheel arranged in front of the driver's seat (9), and (11) is stretched above the driver's seat (9) and the steering wheel (10) via left and right columns (12). The sun visor to be installed, (13) is the windshield stretched between the front end of the sun visor (11) and the rear support frame (14) of the hood, and (15) is the PTO projecting rearward from the rear end of the power transmission case (6).
A shaft (16) is a hydraulic lift equipped with a lift arm (17) and a position control lever (18).

Further, a center drive type rotary tiller (22) is installed to be movable up and down behind the tractor (1) through a top link (20) and a lower link (21) forming a three-point link mechanism (19). (23) is the PTO axis (1
5) A rotary case that is interlockingly connected to, 24 is a top link bracket that connects the top link (20) to the rotary case (23), and (25) is a lower link that connects the lower link (21) to the rotary case (23). Link bracket, (26)
Is a telescopic rod (2) that has a depth adjustment handle (27a) that connects the front end side to the lower link bracket (25).
(7) Depth adjust frame that supports the rear end side so that it can be lifted and lowered, (28) is a cultivating shaft that centrally supports the lower part of the rotary case (23), (29) is a cultivating claw that is attached to the cultivating shaft (28), ( 30) is a rear end side of which is extended and retracted by a rotary cover moving motor (32) whose front end is rotatably supported by a support shaft (31) and whose operation is controlled based on a plowing depth sensor (A). Cultivating claws (29)
A rotary cover that covers the upper side, and (34) are side covers that are fixedly provided on the left and right sides of the rotary cover (30).

Then, the support shaft (35) is provided at the rear end of the rotary cover (30).
The front end is rotatably supported via the hanger rod (3
6) A rear cover (37) is provided to support the rear end side so that it can be lifted up and down and covers the rear side of the tilling claw (29), and extension rear covers (38) are provided on both left and right rear parts of the rear cover (37) so as to be openable and closable. The lower end of the hanger rod (36) is rotatably connected via a support shaft (40) to the front end side of a support frame (39) for fixing the lower end of the hanger rod (36) to the rear end side surface of the rear cover (37). ) Support frame (41) fixed upright on the rear end side surface. The upper side of the hanger rod (36) is slidably inserted and supported by the cylinder shaft (43) that is rotatably supported by the support shaft (42) on the tip side. In addition, the cylindrical shaft (43) is inserted through the adjusting pin (45) and the first spring (46) into which the protruding ends of the hanger rod (36) are inserted into the adjusting holes (44) formed in the rod (36) at regular intervals. When the working machine (22) is lifted and supported as shown in FIG. The rear end side of the bar (37) is suspended and supported by the hanger rod (36), while the second spring (47) is wound around the hanger rod (36) below the tubular shaft (43), and A stopper (48) for adjusting the spring force of the spring (47) is provided, and when the working machine (22) is lowered and supported as shown in FIG. 3, the rear end side of the rear cover (37) is grounded by the second spring (47). It is configured to pressurize.

As shown in FIG. 6, the stopper (48) has a U-shaped cross-section stopper frame (51) having an upper piece (49) and a lower piece (50) which penetrate the hanger rod (36), and an upper piece (49). And the lower piece (50) are provided in a slanted shape so as to eccentrically penetrate the hanger rod (36) and an engaging hole (52) and a hole (52).
A stopper piece (54) having a protrusion (53) protruding to the peripheral edge and fitted into the adjustment hole (44), and a fulcrum that rotatably connects one end of the stopper piece (54) to the base end side of the lower piece (50). Axis (5
5) and a compression spring (56) wound around the hanger rod (36) between the stopper piece (54) and the lower piece (50),
Sliding contact friction between the engaging hole (52) peripheral portion of the stopper piece (54) and the hanger rod (36), and the protrusion (53) and the adjusting hole (4).
By engaging with 4), the stopper (48) is fixedly supported at each adjustment hole (44) position of the hanger rod (36), while the stopper piece (54) resists the spring (56) and the lower piece (50). To the stopper hole (52) by simultaneously releasing the sliding contact between the peripheral edge of the engaging hole (52) and the hanger rod (36) and releasing the engagement between the protrusion (53) and the adjusting hole (44). ) Is moved to each adjustment hole (44) position.

The left and right extension rear covers (38) are of a U-shaped section which is rotatably supported by a fulcrum shaft (58) which is pivotally supported by a bracket (57) of a U-shaped section which is fixedly mounted on the right and left rear surfaces of the rear cover (37). Connect the proximal surface to the bracket (59),
The rear cover (37) is mounted so that it can be opened / closed (reversed) between a use position where the rear cover (37) is flush with the left and right outer sides of the rear cover and a folding position where the rear cover (37) is folded on both left and right rear surfaces, and a return spring (on the open side) 60).

Further, the bracket (57) on the rear cover (37) side
An outer wire (61) having one end connected to the outer wire (61) and an inner wire (62) having one end connected to the bracket (59) on the extended rear cover (38) side.
The other end is the stopper frame (5) of the stopper (48).
1) and the other end of the inner wire (62) to the cylindrical shaft (4
3) and the rear cover (3
7) When the hanger rod (36) moves back and forth with respect to the cylinder shaft (43) as the rear end moves up and down, the length (L) of the inner wire (62) varies, so that the work machine (22) moves up and down. The left and right extension rear covers (38) are configured to open and close in conjunction with each other.

As is clear from the above, a rear cover is provided at the rear of the tractor (1) via a link mechanism (19) so as to be vertically movable, and covers the rear side of the tiller claw (29) of the working machine (22). The hanger rod (36) is provided so that the rear cover (37) can be elastically supported on the ground. The hanger rod (36) is moved forward and backward in conjunction with the lifting operation of the rear cover (37), and the rear cover is also provided. In a tiller for a tractor, wherein an extension rear cover (38) is movably connected to an extension work position or a retreat non-working position on the left and right side portions of (37), the forward and backward movement of the hanger rod (36) and the extension rear cover (38). ) Is provided with an inner wire (62) which is a connecting member for interlocking the forward / backward movement of the rear cover (37), and the extension rear cover (38) is extended based on the forward movement of the hanger rod (36) that detects the downward movement of the rear cover (37). It is configured to automatically retreat against (60).

As shown in FIG. 7, the sun visor (11) is detachably supported by a left and right support frame (63) having a U-shaped cross section, which is horizontally stretched forward from the upper ends of the left and right columns (12), via a snap member (64). In addition, the windshield (13) is housed together with its frame frame (65) between the left and right supporting frames (63) which are opposed to each other.
A plate-shaped extension (63a) integrally formed from the rear end to this front end
The elongated hole (66) is formed on the front end of the elongated hole (66) of the extension portion (63a), and the notch (67) is formed on the front end of the elongated hole (66) on both sides of the upper end of the frame (65) of the windshield (13). (66)
And an upper guide pin (68) slidably and rotatably fitted in the notch (67) and protrudingly fixed, and the front gas bracket (of the bonnet rear support frame (14) on both sides of the lower end of the frame (65) ( The lower guide pin (70) that fits into the upper and lower guide pins (68) (69) that fits into the upper and lower guide pins (68) (69) is fitted to the notch (67) of the support frame (63) and the windshield bracket (69). The front windshield (13) is secured between the front end of the sun visor (11) and the rear support frame (14) of the bonnet by fixing it to the front windshield (upward) of the worker such as in rainy weather. 13) and the sun visor (11), while removing the sun visor (11) and pulling out the lower guide pin (70) from the windshield bracket (69), the upper guide pin (68) is centered up like a virtual line. After turning to
Insert the upper guide pin (68) into the U-shaped cross section of the support frame (63) by sliding the frame frame (65) backward through the long hole (66) and insert the lower guide pin (70) into the notch (6).
By fixing the sun visor (11) to 7) with the lock member of the part, the windshield (13) is stored inside the sun visor (11), and only the sun visor (11) is used in fine weather. It is configured to improve visibility.

This embodiment is configured as described above. As shown in FIG. 3, the rotary tiller implement (22) is lowered and supported, the power is transmitted to the center of the tiller shaft (28), and the tiller claw (29) is rotated. When (1) is advanced to perform plowing work, the rear end side of the rear cover (37) rises corresponding to the working depth, and the rear end side of the rear cover (37) is moved by the spring (47) force set by the stopper (48). The hanger rod (36) retreats from the cylinder shaft (43) by the rear end of the rear cover (36) rising toward the ground, and the length (L) of the inner wire (62).
By shortening, the protruding amount of the inner wire (62) on the extended rear cover (38) side becomes longer, and the extended rear cover (38) is automatically opened by the spring (60) force.
As shown in FIG. 4, when the tractor (1) is swung while supporting the rotary tiller (22) upwardly, the rear end side of the rear cover (37) is lowered by the advance of the hanger rod (36) with respect to the tubular shaft (43). , The hanger rod (36) suspends and supports the descent position set by the adjustment pin (45), and the length (L) of the inner wire (62) increases due to the advance of the hanger rod (36). The amount of protrusion of the inner wire (62) on the side of the extended rear cover (38) is shortened, and the extended rear cover (38) is automatically closed (folded) against the force of the spring (60).

[Advantages of the Invention] As is apparent from the above-described embodiments, the present invention has the cultivator (2) via the link mechanism (19) behind the tractor (1).
2) is provided so that it can be moved up and down, and the tiller claw (29) of the working machine (22)
A rear cover (37) that covers the rear side is provided so that it can be raised and lowered, and a hanger rod (3) that elastically supports the rear cover (37) on the ground is provided.
6) is provided to move the hanger rod (36) forward and backward in conjunction with the raising and lowering operation of the rear cover (37), and the extended rear covers (38) are extended to the left and right side portions of the rear cover (37) to the extended work position or the retractable position. In a tractor tilling device that is connected to a work position so that it can move back and forth, a connecting member (62) that links the forward and backward movement of the hanger rod (36) and the forward and backward movement of the extended rear cover (38) is provided, and the rear cover (37) lowers. The extension rear cover (38) is configured to automatically retreat against the advance spring (60) based on the extension movement of the hanger rod (36) for detecting the extension rear cover (38). (1) Since it is not necessary to connect to the machine side, when attaching and detaching the tiller (22) to and from the tractor (1), the conventional wire attaching and detaching work is unnecessary, and the tiller (22) attaching and detaching work Simplification of It is possible to easily perform, when said rear cover (37) which lift the tilling machine height away from the ground (22), the rear cover (37)
As the extended rear cover (38) retreats when the
Even if the support position of the tiller (22) is low, the extension rear cover (38) can be automatically retracted when it is in a non-working state. ) Can be reduced by retracting the extended rear cover (38) without raising the) to a higher position as in the past, and the tiller (22) is lifted to a lower position near the ground. It is possible to change the direction, and it is possible to easily simplify the handling operation such as the turning operation in the field headland.

[Brief description of drawings]

1 is an operation explanatory view of an extended rear cover, FIG. 2 is a side view of a tractor equipped with a rotary working machine, FIG. 3 is a side view of a rotary working machine in a lowered state, and FIG. 4 is a rotary working machine in a raised state. FIG. 5 is a plan view of the rotary working machine, FIG. 6 is a cross-sectional side view of the stopper, and FIG. 7 is a storage view of the windshield. (1) …… Tractor (19) …… Three-point link mechanism (22) …… Rotary tiller (29) …… Tiller claw (37) …… Rear cover (38) …… Extended rear cover

Claims (1)

(57) [Scope of utility model registration request] 1. A rear cover (37) which is provided at the rear of the tractor (1) via a link mechanism (19) so as to be vertically movable, and covers the rear side of the tiller claw (29) of the working machine (22). ) Is vertically movable, and a hanger rod (36) for elastically supporting the rear cover (37) on the ground is provided. The hanger rod (36) is moved forward and backward in conjunction with the lifting operation of the rear cover (37), and the rear cover (37 ) On the left and right side portions of the extension rear cover (38) in the extended working position or the retracting non-working position so as to be able to move forward and backward, in the cultivating device of the tractor, the movement of the hanger rod (36) and the extension rear cover (38). A connecting member (62) for interlocking the forward / backward movement is provided, and the extension rear cover (38) resists the forward spring (60) based on the forward movement of the hanger rod (36) which detects the downward movement of the rear cover (37). Automatically retreat Cultivator tractor, characterized by being configured so.