JPH064649Y2 - Rear cover device for rotary cultivator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a first working posture in which a rear cover of a cultivator is positioned above a machine frame and a second working position in which the rear cover is positioned below the machine frame.
The present invention relates to a rear cover device for a rotary cultivator, which can be switched to a work posture by a one-touch operation that requires no tools.

[Conventional technology]

Generally, in a rotary cultivator, a rear cover composed of a front rear cover and a rear rear cover is arranged at the rear of the rotary cover, and the rear cover has a first working position to be positioned above the machine frame during standard tillage or deep tillage work, It is possible to switch to a second working position, which is positioned below the machine frame during shallow or standard tillage work, in two stages.

[Problems to be Solved by the Invention] By the way, when switching between the first working posture and the second working posture of the conventional rear cover, the overlapping portion is slid to move the rear cover forward and backward with respect to the machine frame. It is known that bolts are fixed at each work position and bolts are fixed at each work position.The slide switching type slides when soil is caught in the overlapping part. However, there are problems such as loosening of bolts, loosening of bolts, and the need for tools for tightening.In the case of the pin replacement method, it takes time to align the holes on the rear cover side with the machine side, and the pins come off during work. However, there is an inconvenience that it is not easy to switch the work posture of the rear cover due to interruption of work.

The present invention was devised in order to eliminate the drawbacks in view of the above-mentioned conventional rear cover device, and an object of the present invention is to provide a first working posture during standard tillage or deep tillage and shallow tillage or standard tillage. It is intended to provide a rear cover device for a rotary cultivator, which can switch the rear cover to the second working position during the tilling work by a tool-less one-touch operation.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is arranged at a rear portion of a rotary cover of a rotary cultivator, and switches between a first working posture located above the machine frame and a second working posture located below the machine frame. In a rear cover device for a rotary cultivator having a possible rear cover, the rear cover includes a front rear cover pivotally supported by a rear part of the rotary cover and a rear rear cover pivotally supported by a rear part of the front rear cover, The rear cover is connected to the machine frame via a rear cover attitude maintaining member, and either one of the front and rear ends of the rear cover attitude maintaining member can be displaced into a longitudinal hole in the longitudinal direction with respect to the machine frame side or the front rear cover side. While pivoting to
A switching mechanism that locks the displaced end portion of the rear cover posture maintaining member with the cam plate that is rotated toward the front end side or the rear end side of the long hole is provided to move the rear cover between the first working posture and the second working posture. It is characterized in that it can be switched to.

[Action]

Therefore, the rear cover posture maintaining member is displaced forward or backward along the longitudinal slot, and its end is locked to the cam plate of the switching mechanism which is rotated to the front end side or the rear end side of the slot. For example, the front rear cover is rotated around the rear part of the rotary cover as a fixed fulcrum to be pulled up or down,
The rear cover can be switched between a first work posture located above the machine frame and a second work posture located below the machine frame.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

1 and 2 are overall side views of a rotary cultivator to which the present invention is applied. FIG. 1 is a first working posture of a rear cover during standard tillage or deep tillage work, and FIG. 2 is during shallow tillage or standard tillage work. The second working posture of the rear cover in
FIG. 3 is a plan view of a main part of the cultivator. In the figure, 1
Is a rotary cultivator and is connected to a tractor (not shown) by a three-point link. The rotary cultivator 1 is a cultivating working unit 3 having a cultivating claw 2, a gear case 5 that accommodates a gear that transmits the power extracted from the tractor to the left and right transmission shafts 4, and a cultivating working unit that rotates the left and right transmission shafts 4 3, a chain case 6 for accommodating the chain to be transmitted to 3, a top link support 8 connected to the top link 7 of the tractor, a pair of left and right toolbars 9 pivotally attached to the lower part of the top link support 8, a top link support 8 upper part and a toolbar 9
It comprises a tail wheel floating device 10 and a working depth adjusting device 11, which are connected to the axial central part of the device, a rotary cover 12 provided on the upper part of the tilling part 3, a rear cover device 13 according to the present invention, and the like. ing.

As shown in detail in FIGS. 4 to 6, the rear cover device 13 includes a rear cover 14 including a front rear cover 14a and a rear rear cover 14b arranged at the rear of the rotary cover 12.
And a switching mechanism 15 for switching the rear cover 14 between a first working posture during standard tillage work and a second working posture during shallow tillage work, and the front rear cover 14a has a rotary cover at its front edge. Axis 16 at rear edge of 12 and rear rear cover 14b
Is pivotally mounted together with a shaft 17 on the rear edge of the front rear cover 14a so as to be rotatable.

On the other hand, a channel-shaped support member 18 extending rearward is fixedly mounted on the casing 4'of the transmission shaft 4 in the left-right direction, and is provided in a longitudinal hole 19 formed in the rear end portion of the support member 18 in the front-rear direction. The rod-shaped rear cover posture maintaining member 20 has a pin 21 at the front end thereof rotatably supported, and the rear end of the rear cover posture maintaining member 20 is pivotally mounted on a bracket 22 fixed to the upper surface of the front rear cover 14a.
It is pivotally attached at 23. An operation handle 24 is attached to the rear cover posture maintaining member 20.

In the switching mechanism 15, a fan-shaped cam plate 25 is rotatably attached to a support member 18 by a shaft 26, and an L-shaped lever 27 is fixed to the top of the upper end surface of the cam plate 25. A spring 28 is stretched between the horizontal shaft portion 27a and a position below the shaft 26 of the supporting member 18, and when the lever 27 is operated forward, the cam plate 25 is formed into a long hole 19.
As the spring 28 rotates toward the front end side, the spring 28 shortens past the middle point of maximum extension, and the front edge 25a of the cam plate 25 locks the pin 21 at the front end of the slot 19 with the spring force. (FIG. 4) When the lever 27 is operated rearward, the cam plate 25 rotates to the rear end side of the elongated hole 19, and the spring 28 once extends at the middle point and then shortens, so that the rear edge of the cam plate 25 moves. 25b, the pin 21 at the rear end of the slot 19 is operated by a spring force (FIG. 5). The front and rear turning limit points of the cam plate 25 are regulated by the horizontal shaft portion 27a of the lever 27 contacting the upper surface of the support member 18.

In FIGS. 1 and 2, reference numeral 29 is a working depth adjusting handle, 30 is a tail wheel floating operation lever, 31 is a leveling pressure adjusting mechanism of the rear cover, and the leveling pressure adjusting mechanism 31 is from the toolbar 9. It comprises a pressure rod 33 supported by an extended bracket 32, upper and lower springs 34, 35, and a pin 36.

In the above structure, the cam plate 25 rotates to the front end side of the long hole 19 in a state where the lever 27 of the switching mechanism 15 is tilted forward, and the rear cover posture maintaining member at the front end portion of the long hole 19 of the support member 18 is provided. 20
The pin 21 at the front end of the cam plate 25 has a long edge 19a at the front edge 25a.
The front rear cover 14a, which is locked to the front end of the rear cover by a spring force and is pivotally attached to the rear end of the rear cover posture maintaining member 20 via a bracket 22, is a shaft 16 at the rear edge of the rotary cover 12.
Is raised with the fulcrum as the fulcrum, and as shown in FIG. 1, it is in the first working posture positioned above the machine frame.

In this first work posture, in the rotary tilling work, the standard tillage of 120 to 150 mm or the deep tillage of 150 mm or more is performed, and the deep tillage in the ridge breaking work is performed.

In order to switch from the first work posture to the second work posture in which the rear cover 14 is located below the machine frame, the operation handle 24 of the rear cover posture maintaining member 20 is supported by one hand and the lever of the switching mechanism 15 is held by the other hand. Tilt back 27 to make cam plate 25 a long hole.
When rotated to the rear end side of 19, the spring 28 once extends at the middle point and then shortens, and the cam plate is housed in the backward rotation position by the spring force. Therefore, the locking by the front edge 25a of the pin 21 at the front end of the elongated hole 19 is released, so that the handle 24
As you lower with both hands, the pin 21 moves backward through the long hole 19,
The bottom surface 25c of the cam plate 25 which is rotating rearward on the way is pushed up to reach the rear end portion of the elongated hole 19. At this time, since the cam plate 25 is not returned to the middle point of the maximum spring tension, when the pin 21 reaches the rear end of the elongated hole 19, the cam plate 25 is returned to the rearward rotation position by the spring force, and the rear edge 25b is formed. The pin 21 is locked to the rear end of the slot 19. Therefore, the front fulcrum of the rear cover posture maintaining member 20 moves rearward with respect to the machine frame, and the front rear cover 14a moves downward with the shaft 16 at the rear edge of the rotary cover 12 as the fulcrum.
The one-touch operation of the rear cover 14 brings it into a second working position, which is located below the machine frame, as shown in FIG.

In this second work position, shallow tillage of 50 to 120 mm is carried out in rotary tillage work, shallow or standard tillage is carried out in clearing work, and shallow tillage of 0 to 80 mm is carried out in weeding work such as orchards. Be seen.

In order to return the second working posture to the first working posture again, contrary to the above, the lever 27 is tilted forward, and the cam plate 25 is rotated toward the front end side of the elongated hole 19 so that the rear end portion of the elongated hole 19 of the pin 21. When the lock is released and the operation handle 24 is pulled up, the pin 21 at the front end of the rear cover posture maintaining member 20 is locked at the front end of the elongated hole 19 by the front edge 14a of the cam plate, and the rear cover 14 is one-touched. The operation returns to the first work posture.

FIG. 7 shows another embodiment of the switching mechanism. In this switching mechanism 15 ', the bracket 22' of the front rear cover 14a is provided with a long hole 19 'and a cam plate 25' to maintain the rear cover posture. A pin 23 'at the rear end of the member 20 is rotatably supported in the elongated hole 19', and is switched and locked to the front and rear ends of the elongated hole 19 'by a cam plate 25'.

In this switching mechanism 15 ', when the cam plate 25' is tilted forward and the pin 23 'at the rear end of the rear cover posture maintaining member 20 is locked at the front end of the slot 19', the front rear cover 14a is pulled down. When the rear cover 14 is in the second working position and the cam plate 25 'is tilted backward and the pin 23' is locked to the rear end of the elongated hole 19 ', the front rear cover 14a is pulled up and the rear cover 14 is in the first working position. Becomes

FIGS. 8, 9, and 10 show another switching mechanism. In this switching mechanism 15 ″, a long hole is formed in the supporting member 18 ′ on the machine frame side.
19 ", a switching lever 37, and a lever guide hole 38 are provided, and the front end portion of the rear cover posture maintaining member 20 is bent in an L shape and slidably supported in the long hole 19", and the intermediate point is rotatable. The lower end portion of the switching lever 37 supported by the shaft 39 is engaged with the L-shaped portion 20a of the rear cover posture maintaining member 20, and the upper portion is inserted into the lever guide hole 38 so that the groove 38a at both ends of the lever guide hole 38 is inserted.
The lever 37 is biased by a spring 40 in a direction to be locked in the groove 38a.

In this switching mechanism 15 ″, when the switching lever 37 is tilted forward and the L-shaped portion 20a of the front end portion of the rear cover posture maintaining member 20 is positioned at the rear end portion of the long hole 19 ″, the rear cover 14 is in the second working posture, When the switching lever 37 is tilted backward and the L-shaped portion 20a is positioned at the front end of the elongated hole 19 ', the rear cover 14 is in the first posture.

[Effect of device]

As described above in detail, according to the present invention, there are a first working posture which is disposed at the rear portion of the rotary cover of the rotary cultivator and which is located above the machine frame and a second working posture which is located below the machine frame. In a rear cover device for a rotary cultivator having a switchable rear cover, the rear cover includes a front rear cover pivotally supported by a rear part of the rotary cover and a rear rear cover pivotally supported by a rear part of the front rear cover, Part rear cover is connected to the machine frame via a rear cover posture maintaining member, and either one of the front and rear ends of the rear cover posture maintaining member is displaced into a longitudinal hole in the longitudinal direction with respect to the machine frame side or the front rear cover side. The rear cover is provided with a switching mechanism that freely pivots and locks the displaced end portion of the rear cover posture maintaining member with a cam plate that is rotated toward the front end side or the rear end side of the long hole. Since you can switch over to the first working position and a second working position, as the presumed dead, switch scheme previous slide switching method or pins, Dari crowded bite the soil switching unit,
There is no inconvenience that a tool is required and hole alignment of the pin is troublesome, and the rear cover posture maintaining member is simply displaced forward or backward along the long hole in the front-rear direction, and the end portion thereof is A first work posture for performing standard tillage or deep tillage work on the rear cover and a second for performing shallow tillage or standard tillage by a one-touch operation of only engaging with the cam plate of the switching mechanism rotated to the front end side or the rear end side. It is possible to switch to the work posture, and the work efficiency can be improved.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are overall side views of a rotary tiller to which the present invention is applied. FIG. 1 is a first working posture during standard tillage work, FIG. Shows the second work postures during shallow tillage or standard tillage work, respectively. FIG. 3 is a plan view of the main parts of the cultivator, and FIGS. 4 and 5 are side views of the main parts of the rear cover device. Is in the first working position, FIG. 5 is in the second working position, FIG. 6 is a longitudinal sectional view of the cam mechanism,
FIG. 7 is a side view showing another embodiment of the switching mechanism, FIG. 8 is a perspective view showing another switching mechanism, and FIGS. 9 and 10 are partially cutaway rear views and longitudinal sectional views of the switching mechanism. Is. DESCRIPTION OF SYMBOLS 1 ... Rotary tiller, 12 ... Rotary cover, 14 ... Rear cover, 14a ... Front rear cover, 14b ... Rear rear cover, 15,15 ', 15 "... Switching mechanism, 16, 17 ... Shaft, 18, 18' ...
Support member, 19, 19 ', 19 "... Long hole, 20 ... Rear cover posture maintaining member, 20a, 21 ... Rear cover posture maintaining member front end pivot, 23, 23' ... Rear cover posture maintaining member rear end pivot.

Claims (1)

[Scope of utility model registration request] 1. A rear cover, which is disposed at a rear portion of a rotary cover of a rotary cultivator, and is capable of switching between a first work posture located above the machine frame and a second work posture located below the machine frame. In the rear cover device for a rotary cultivator, the rear cover includes a front rear cover pivotally supported at the rear of the rotary cover and a rear rear cover pivotally supported at the rear of the front rear cover. Connected via the rear cover posture maintaining member,
One of the front and rear end portions of the rear cover posture maintaining member is movably pivotally supported in an elongated hole in the front-rear direction with respect to the machine frame side or the front rear cover side, and the displaced rear cover posture maintaining member has an end portion. A rotary mechanism characterized in that a rear cover can be switched between a first working position and a second working position by providing a switching mechanism that is locked by a cam plate rotated to the front end side or the rear end side of the long hole. Rear cover device for cultivator.