JP3568765B2 - Rotary cover - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotary cover in a rotary working machine connected to a tractor.
[0002]
[Prior Art and Problems to be Solved by the Invention]
Conventionally, the rotary of the rotary work machine for tilling connected to a tractor has a main cover and an intermediate cover whose front end side is rotatably supported by the main cover. There is known a vehicle in which a rear side is covered by a rear cover that is pivotally supported by a vehicle. However, the intermediate cover is generally formed of a single plate, and has a structure in which a reinforcing material is attached to the single plate, has low strength against torsion and bending, and has disadvantages such as occurrence of welding distortion. Increasing the plate thickness to increase the strength also increases the weight and makes it difficult to handle.
[0003]
[Means for Solving the Problems]
A rotary cover according to the present invention for solving the above-mentioned problems is provided behind a main cover 18 that covers an upper part of a rotary 17 via an intermediate cover 19 whose front end is rotatably supported by the main cover 18. A rear cover 21 that covers the rear of the rotary 17 is connected and provided, and the front end of the rear cover 21 is pivotally supported on the rear of the intermediate cover 19 so as to be freely opened and closed. A base material 23 made of an integral tube having a cross section of a shape, and a side plate 24 fixed to both side surfaces of the base material 23, and the side plate 24 is rotatably supported on the main cover 18 side. It is characterized by having.
[0004]
The intermediate cover 19 has a front end surface projecting in a semicircular shape in a side view, and a rear end surface having a concave shape in a side view. The intermediate cover 19 is formed in a concave portion 49 of the rear end surface via a rod-shaped soft elastic body 51. The second rotary cover.
[0005]
The third rotary cover is that the intermediate cover 19 is connected to the rear end of the main cover 18 via a connecting member 28 formed of an integral tube having a box-shaped cross section.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the rotary working machine 1 of the present embodiment is connected to the rear of a traveling body 2 such as a tractor via a three-point link hitch 3 so as to be able to move up and down, and has a structure similar to that of the related art for performing plowing work in a field. As shown in FIGS. 1 and 2, a pipe frame 6 is provided to protrude left and right from a gear case 4 to which PTO power is input from the traveling body 2 side.
[0007]
A chain case 7 is integrally provided at one (left) outer end of the pipe frame 6, and a side frame 8 having a U-shaped cross section in plan view is integrally provided at the other (right) outer end. At the same time, a bearing bracket 9 is fixed to a lower portion of the side frame 8, and a pawl shaft 14 is rotatably supported by the bearing bracket 9 and a support portion 11 provided on the chain case 7 side.
[0008]
As a result, the driving force input to the gear case 4 is input to the claw shaft 14 via the chain case 7 and the claw shaft 14 is driven to rotate. A plurality of rotating claws 16 are attached to form a rotary 17 serving as a tilling work unit. The rotary working machine 1 is configured such that the rotary 17 (rotating claw 16) performs tilling work in a field by rotation of a claw shaft 14. Have been.
[0009]
At this time, the rotary 17 has an upper front side by a main cover 18 supported on the chain case 7 and the side frame 8 side, and an upper rear side by an intermediate cover 19 whose front end is connected to the main cover 18 side. The rear cover 21 is connected to the rear and has a substantially O-shaped cross section. The rear cover 21 is covered with the rear cover 21. That is, the main cover 18, the intermediate cover 19, and the rear cover 21 form a cover 22 that covers the rotary 17. The structure of each of the covers 18, 19, 21 will be described below.
[0010]
As shown in FIGS. 3 and 4, the main cover 18 has a substantially arc-shaped cross section in a side view and covers the upper side of the rotary, and is provided on the front end side of the top plate 26 in the left-right direction. The reinforcing member 27 (see FIG. 1), a connecting member 28 provided at the rear end of the top plate 26 in the left-right direction and fixed thereto, and fixed to the top plate 26 so as to cover the side surface of the rotary 17. The lower end of both side plates 29 is supported by the chain case 7 and the side frame 8 as shown in FIG.
[0011]
At this time, the connecting member 28 has an irregular shape (rectangular shape) in which the front end surface protrudes in a substantially semicircular shape in a side view and a part of the rear end surface is concavely concave in a semicircular shape so as to open rearward. Etc.) (which means different from a square). A bracket 31 is fixed to the upper surface of the connecting member 28, and the bracket 31 is connected to a top mast 32 attached to the gear case 4 side through an operation lever 33 and a rod 34 which are provided to be able to rotate back and forth. The main cover 18 is configured to rotate forward and backward by the forward and backward rotation operation of the operation lever 33 as in the related art.
[0012]
On the other hand, the intermediate cover 19 has a front end surface protruding substantially in a semicircular shape in a side view and a semicircular concave shape such that a part of the rear end surface opens rearward, similarly to the connection member 28 described above. A base material 23 formed of an integral tube having a box-shaped cross section of a deformed shape (meaning different from a rectangular shape such as a rectangle) in a concave side view, and side plates 24 fixed to both side surfaces of the base material 23; The front end of the side plate 24 is rotatably supported by a fulcrum shaft 36 fixed to the side plate 29 by screws, and is rotatably supported by the main cover 18.
[0013]
A pin 37 slidably projecting outward on the side plate 24 is urged outward by a spring 38 to be axially supported, and the pin 37 is removably inserted into the side plate 29. A hole 39 is formed, and the positioning of the intermediate cover 19 with respect to the main cover 18 is performed by inserting the pin 37 into the hole 39. At this time, the front end face of the intermediate cover 19 that protrudes in an arc shape in a side view and the rear end face of the connecting member 28 that is concave in a semicircular shape in a side view face each other. A rod-shaped soft elastic body 42 is inserted in the, and is pressed and held between the connecting member 28 and the intermediate cover 19.
[0014]
The side plate 29 has a center on an arc centered on the axis of the fulcrum shaft 36 and a radius from the axis of the fulcrum shaft 36 to the center of the hole 39 in a side view. The pin 37 is pulled out from one of the holes 29 or 43 by a handle 44 provided on the pin 37, and the intermediate cover 19 is pivoted with respect to the main cover 18 with respect to the main cover 18. The support angle of the intermediate cover 19 with respect to the main cover 18 can be changed by swinging about the shaft 36 and inserting the pin 37 into the other hole 43 or 29.
[0015]
Although the rear cover 21 has a substantially rectangular cross section in a side view as in the related art, a cylindrical connecting portion 46 is integrally fixed to the front end in the left-right direction. The rear cover 21 is rotatable with respect to the intermediate cover 19 by being inserted between the cylindrical receivers 47 provided on the left and right ends, and the receivers 47 and the connecting portion 46 being rotatably connected by the pins 48. It is supported by.
[0016]
At this time, the rear end face of the intermediate cover 19 that is concavely concave in a semicircular shape in a side view and the cylindrical connecting portion 46 face each other, but the concave recess 49 of the rear end face of the intermediate cover 19 (base material 23) The rod-shaped soft elastic body 51 similar to the above is inserted, and is pressed and held between the intermediate cover 19 and the rear cover 21.
[0017]
A bracket 52 provided on the upper surface of the intermediate cover 19 and a bracket 53 provided on the upper surface of the rear cover 21 are connected by a suspension rod 54, and the intermediate cover 19 (main cover 18) of the rear cover 21 is connected by the suspension rod 54 as in the related art. Has been determined.
[0018]
As described above, since the intermediate cover 19 and the connecting member 28 are formed of a box-shaped integral tubular member, the intermediate cover 19 and the connecting member 28 have a relatively simple structure and a relatively high strength despite their relatively light weight. In addition, the handling of the intermediate cover 19 becomes easy, the processing cost is relatively low, and the aesthetic appearance is maintained. Further, since the intermediate cover 19 and the connecting member 28 are formed of an integral tube, the dimensional accuracy can be made relatively high, and troubles or the like due to the accuracy of the intermediate cover 19 and the like can be reduced.
[0019]
Further, since the rod-shaped soft elastic members 42 and 51 are elastically inserted between the main cover 18 and the intermediate cover 19 and between the intermediate cover 19 and the rear cover 21, as described above, In addition to the relatively high accuracy of the connecting member 28, the elastic members 42 and 51 seal between the covers 18, 19 and 21, and the elastic members 42 and 51 are attached to the covers 18, 19 and 21. Absorbing the error (relatively small) of the accuracy of the soil, it is possible to more reliably prevent the discharge of soil and muddy water, etc. In addition, there is little backlash between the covers 18, 19 and 21 due to the connection, and compared with the conventional one. There is little rattling noise.
[0020]
In particular, since the elastic bodies 42 and 51 are held by the unevenness, the two elastic bodies 42 and 51 are stably held, and the sealing is performed more reliably. Further, the concave portion 41 of the connecting member 28 having a modified box-shaped cross section faces the protruding front end of the intermediate cover 19 (base material 23), and the concave portion 49 of the intermediate cover 19 (base material 23) and the cylindrical shape of the rear cover 21. Are connected to each other, so that the lower covers of the main cover 18, the connecting member 28, the intermediate cover 19, and the rear cover 21 are smoothly connected. The flow of soil during tilling becomes smooth, and the amount of soil attached to the covers 18, 19, and 21 is small.
[0021]
【The invention's effect】
According to the structure of the present invention configured as described above, since the intermediate cover is formed of an integral tubular member having a box-shaped cross section, the intermediate cover has a relatively simple structure, is relatively lightweight, Despite the fact, there is an effect that the strength is relatively high, handling is easy, the processing cost is relatively low, and the aesthetic appearance is maintained. In particular, since it is formed of an integral pipe, the dimensional accuracy can be made relatively high, and troubles and the like caused by the accuracy of the intermediate cover and the like are reduced.
[0022]
In addition, by inserting a rod-shaped soft elastic body between the main cover and the intermediate cover, the dimensional accuracy of the intermediate cover is relatively high as described above. In addition to the above, the elastic body absorbs an error (relatively small) in the accuracy of the main cover and the intermediate cover, so that the ejection of soil or muddy water can be more reliably prevented, and there is little play between the covers due to connection. There is an advantage that rattling noise or the like is reduced as compared with the conventional one. At this time, the elastic body is securely held by the recess.
[0023]
Further, the intermediate cover is connected to the main cover through a connecting member formed of an integral tube having a box-shaped cross section, so that the lower surfaces of the main cover, the connecting member, the intermediate cover, and the rear cover are smoothly connected. There is an effect that the flow of soil at the time of tilling becomes smooth, and the adhesion of soil to each cover side is reduced.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a main part of a rotary working machine.
FIG. 2 is a partial rear sectional view of a main part of the rotary working machine.
FIG. 3 is a sectional side view of a main part of an intermediate cover portion.
FIG. 4 is an exploded perspective view showing a connected state of a main cover, an intermediate cover, and a rear cover.
FIG. 5 is a main part plan sectional view showing a connected state of a main cover, an intermediate cover, and a rear cover.
[Explanation of symbols]
17 Rotary 18 Main cover 19 Intermediate cover 21 Rear cover 49 Depression 51 Elastic body 28 Connecting member

Claims (3)

Behind the main cover (18) that covers the upper side of the rotary (17), the front end side is behind the rotary (17) via an intermediate cover (19) rotatably supported by the main cover (18). A rear cover (21) that covers the front cover is connected and provided, and the front end side of the rear cover (21) is pivotally supported on the rear side of the intermediate cover (19) so as to be freely opened and closed. in the base material made of integral tubular material which forms a box-like cross-section (23), formed by a plate (24) secured to both sides of the base material (23), the main cover side plate (24) (18) A rotary cover rotatably supported on the side . The intermediate cover (19) has a shape in which the front end surface protrudes in a semicircular shape in side view, and the rear end surface is concavely depressed in side view. 2. The rotary cover according to claim 1, wherein the intermediate cover (19) is connected to the intermediate cover (19). 3. The rotary cover according to claim 1, wherein the intermediate cover is connected to a rear end of the main cover via a connecting member formed of an integral tube having a box-shaped cross section.

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