JP5216396B2 - Tillage work machine - Google Patents

Description

  The present invention includes a top cover that covers an upper portion of a rotary working body that is rotatably supported, and a tiller that includes a rear cover that covers the back side of the rotary working body and is supported by a rear end portion of the upper cover so as to be rotatable up and down. More particularly, the present invention relates to a tilling work machine capable of preventing soil from adhering to the inner surfaces of these covers.

  Such a tillage work machine is used to prevent the soil released from the rotary work body from adhering to the back surface of the upper cover and the back surface of the rear cover during the tilling work. Conventionally, a cover is provided on the back surface.

  For example, as shown in FIG. 7A (partial cross-sectional side view), the conventional cover body has rubber covering the rotary work body 11 from the front side to the rear side so as to cover the upper side of the rotary work body 11. The flexible plate 60 made of synthetic resin or the like, and the inner side of the rear cover 61 attached to the horizontal member attached to the rear end edge of the flexible plate 60 so as to be rotatable in the vertical direction are bent. As shown in FIG. 7B (cross-sectional view), an upper cover 65 that covers the upper portion of the rotary working body 11 is configured. A guide plate 68 made of an elastic resin material is provided between a rear cover 66 connected to the rear end of the upper cover 65 so as to be swingable in the front-rear direction and an engaging portion 67 provided in the middle of the upper cover 65. (See Patent Document 2).

Japanese Utility Model Publication No. 52-45609 Japanese Utility Model Publication No. 64-56601

  Among such conventional tillage working machines, the flexible plate provided inside the rear cover of the cover body described in Patent Document 1 has both front and rear ends fixed to the rear cover. When the soil released to the middle part of the plate collides, the flexible plate bends to prevent the soil from adhering to the flexible plate, but the end of the flexible plate to which the flexible plate is fixed is bent. If the soil adheres even a little, it will gradually become larger as the work progresses, and eventually the vicinity of the rotation trajectory where the tip of the tillage nail provided on the rotary work body moves To stick. For this reason, the soil with which the tilling nail adheres is scraped off, the required power increases, and the wear rate of the tilling nail increases, resulting in a problem that the life is shortened.

  Moreover, since the rear side edge part of the guide plate which comprises the cover body of patent document 2 is also detachably fixed to the rear cover similarly to the case of patent document 1, the guide plate was fixed. When soil adheres to the part, the adhered soil gradually increases as the work progresses, and adheres to the vicinity of the rotation trajectory of the tip of the tilling claw. For this reason, the soil to which the tilling nail adheres is scraped off, the wear of the tilling nail is accelerated, the life is shortened, and the required power increases.

  The present invention has been made in view of such a problem, and provides a tilling work machine capable of reducing the fixing portion of the cover body to which the soil is most likely to adhere, and preventing the soil from adhering to the cover body. For the purpose.

In order to solve such a problem, the present invention has the following features. One of the features is that the rotary work body is provided rotatably on the machine body, an upper cover that covers the upper part of the rotary work body, and a rear end portion of the upper cover that covers the back side of the rotary work body. In a tilling work machine having a rear cover that is movably supported, a flexible cover body that extends from the front end of the upper cover to the front side of the rear cover on the inner surface side of the upper cover and the rear cover. And an elastic support member disposed along the inner surface of the rear cover from the upper cover between the surface of the cover body and the inner surface of the rear cover, and the cover body is coupled to the elastic support member at the rear end. Te, Ri separable freely der directly or indirectly against the inner surface of the rear cover, the front-rear direction intermediate portion of the cover body is connected to the upper cover with the front end portion of the elastic support member, which is connected to the upper cover portion After Cover body portion side is characterized in that it is vibrating so that the belly.

  According to this feature, a flexible cover body extending from the front end of the upper cover to the front side of the rear cover is provided on the inner surface side of the upper cover and the rear cover, and the surface of the cover body and the inner surface of the rear cover are provided. An elastic support member disposed along the inner surface of the rear cover from the upper cover, and the cover body is connected to the elastic support member at the rear end thereof, directly or indirectly with respect to the inner surface of the rear cover When the soil released from the rotary work body collides with the cover body, the cover body bends to the rear cover side together with the elastic support member, and the elastically deformed elastic support member returns to the original position. Accordingly, the cover body also returns to the original position. For this reason, when the soil discharged from the rotary working body continuously collides with the cover body, the cover body can be vibrated. At this time, the cover body becomes an antinode of vibration, and the amplitude of vibration increases. Therefore, even if the soil released from the rotary working body is not attached to the cover body, this vibration can blow off the released soil or weaken the adhesive force. For this reason, it is possible to prevent the soil released from the rotary working body from being attached to the cover body.

  The cover body is supported by an elastic support member, and the support mechanism of the cover body is extremely simple. For this reason, it is possible to reduce the number of parts having a structure that supports the cover body so as to be able to contact and separate from the rear cover, and it is possible to suppress an increase in the cost of the tillage working machine.

  Further, one of the features is that a flexible support member is fixed to the upper cover from its front end, and the cover body is supported at the tip of the support member.

  According to this feature, a flexible support member that protrudes from the front end of the upper cover is fixed to the upper cover, and the cover body is supported by the tip of the support member, so that it can be released from the rotary work body. When the soil thus made collides with the front end portion of the cover body, the front side of the cover body is bent and deformed together with the support member toward the upper cover side, and the deformed support member and the cover body are returned to their original positions. For this reason, when the soil discharged from the rotary working body continuously collides with the front side of the cover body, the front side of the cover body can be vibrated. And since a cover body becomes a vibration antinode, the amplitude of vibration becomes large. Therefore, it is possible to prevent the soil released from the rotary working body from adhering to the cover body.

  One of the features is that a buffer member is provided on the surface of the elastic support member on the rear cover side.

  According to this feature, by providing a cushioning member on the surface of the elastic support member on the rear cover side, as the work implement itself is lifted when the work implement is turned, the rear cover is rotated toward the rotary work body. The sound generated when the buffer member comes into contact with the rear cover can be reduced by bringing the buffer member into contact with the inner surface of the rear cover.

  One of the characteristics is that the elastic support member makes the buffer member contact the inner surface of the rear cover.

  According to this feature, the elastic support member makes the buffer member contact the inner surface of the rear cover, thereby transmitting the vibration transmitted from the farm field to the rear cover during the tilling work to the cover body via the buffer member. Can do. For this reason, the cover body can be vibrated at the time of tillage work, coupled with the vibration of the cover body that occurs when the soil released from the rotary work body collides with the cover body, and the soil non-sticking is more effectively performed. Can be suppressed. Further, when the rear cover rotates to the rotary work body side as the work machine is lifted up when the work machine is turned, the rear end of the elastic support member is pushed to the rotary work body side via the buffer member, and the elastic support member Bends toward the rotary work body. At the same time, the cover body is bent in a convex shape toward the rotary working body. For this reason, the outer surface bent in a convex shape of the cover body is deformed so as to extend, and the soil not attached to the outer surface can be dropped. Further, the bent cover body comes into contact with the claws provided on the rotary working body, and the soil not attached to the cover body can be removed. For this reason, the soil which did not adhere to the cover body can be effectively dropped.

  According to the tillage working machine according to the present invention, the tilling work machine having the above-described features can reduce the fixed portion of the cover body to which the soil is most likely to adhere and prevent the soil from adhering to the cover body. Can be provided.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 (side view of the working machine) and FIG. 2 (side view), the tillage working machine 1 travels to the front of the machine body 5 having the main frame 3 extending in the width direction (left-right direction). A top mast 6 and a lower link connecting portion connected to a three-point link connecting mechanism (not shown) provided at a rear portion of the machine body 90 are provided, and are attached to a rear portion of the traveling machine body 90 so as to be movable up and down. A gear box 7 having an input shaft 7a projecting forward is provided at the center in the left-right direction of the main frame 3, and power is input from the PTO shaft of the traveling machine body 90 through a power transmission means such as a universal joint to the input shaft 7a. To be communicated to.

  A chain transmission case 9 is suspended from one end (left side) of the main frame 3, and a side frame is opposed to the chain transmission case 9 at the other end (right side) of the main frame 3. It is installed vertically. A transmission mechanism is provided in the left side portion of the main frame 3 connected to the chain transmission case 9 and in the chain transmission case 9, and a plurality of tilling claws 12 are attached between the chain transmission case 9 and the lower ends of the side frames. A rotary work body 11 is rotatably provided. Then, the power transmitted to the input shaft 7a is transmitted to the transmission mechanism in the main frame 3 and the chain transmission case 9 through the gear box 7 to rotate the rotary working body 11 in the down cut direction (counterclockwise direction). Let

  The upper side of the rotary working body 11 is covered with an upper cover 15, and side covers 17 are provided at both left and right ends of the upper cover 15. The upper cover 15 extends from the front side to the rear side of the rotary working body 11, and a rear cover 20 is attached to the rear end portion of the upper cover 15 so as to be rotatable in the vertical direction.

  The rear end of the rear cover 20 extends obliquely downward from the rear end of the upper cover 15, and the cultivated soil surface is leveled by the rear end 20 a of the rear cover 20. An angle adjusting device 40 that is attached between the rear surface of the rear cover 20 and the main frame 3 and adjusts the inclination angle of the rear cover 20 is provided on the inner side in the width direction of the body 5.

  The inner surface on the front side of the rear cover 20 is disposed at a position covering the back side of the rotary working body 11 to prevent the scattering of the soil released from the rotary working body 11.

  From the front end of the upper cover 15 to the space part inside the inner surface of the upper cover 15 and the rear cover 20 connected to the upper cover 15 and outside the rotation trajectory of the tip of the tilling claw 12 provided on the rotary working body 11. A cover body 30 extending over the front side of the rear cover 20 is provided. The cover body 30 is made of a rubber material and has a flexible plate shape, and its front end is an upper portion as shown in FIG. 3A (partially enlarged sectional view). The cover 15 is supported by a support member 23 protruding from the front end portion of the cover 15.

  The support member 23 is made of a rubber material and has a flexible plate shape, and its rear end portion is fastened to the front end portion of the upper cover 15 via bolts 24 and nuts 25. It is fixed. When the support member 23 is fixed to the upper cover 15, the support member 23 is attached to the upper cover via a collar 26 whose side in contact with the bolt head is widened in order to enlarge a fastening region to the support member 23 by the bolt 24. 15 is fixed.

  The front end portion of the cover body 30 is fixed to the front end portion of the support member 23 by screwing a nut 25 ′ into the bolt 24 ′ inserted through this and the front end portion of the support member 23. When fixing the cover body 30 to the support member 23, in order to expand the fastening range to the support member 23 by the bolt 24 ′, the collar 26 ′ whose side in contact with the bolt head is expanded and the nut 25 ′ A front end portion of the cover body 30 is fixed to the support member 23 using a washer 27 having a large diameter.

  In this manner, the front end portion of the cover body 30 protrudes from the front end portion of the upper cover 15 and is fixed to the front end portion of the flexible support member 23 so that the front side of the cover body 30 can be moved in the vertical direction. Can be supported. Note that the front end portion of the cover body 30 is not limited to the support member 23 described above as long as it projects from the front end portion of the upper cover 15 and has flexibility, and may be supported by a leaf spring.

  A portion of the intermediate portion of the cover body 30 extending in the front-rear direction that faces the rear end of the upper cover 15 is longer than the thickness of the cover body 30 as shown in FIG. A collar 32 capable of forming a gap 31 is inserted between the rear inner surface of the upper cover 15 and the surface of the cover body 30. The collar 32 includes a cylindrical portion 32a through which the shaft portion of the dish-shaped bolt 34 passes and a flange portion 32b that is connected to the proximal end side of the cylindrical portion 32a and expands outward. . The shaft portion of the bolt 34 is inserted from the flange portion 32 b and passes through the cylindrical portion 32 a and the upper cover 15, and is screwed into a nut 25 ″ disposed on the upper cover 15, so that the collar 32 is attached to the upper cover 15. While fixing, the intermediate part of the cover body 30 is made to contact / separate with respect to the rear-end part of the upper cover 15. FIG.

  An elastic support member 43 formed of a leaf spring is provided between the rear side of the cover body 30 and the inner surface of the upper cover 15. The elastic support member 43 is fixed in a state where the front end side is sandwiched between the collar 32 and the upper cover 15, and the rear end side of the elastic support member 43 is the inner surface of the rear cover 20 as shown in FIG. It extends along. That is, the elastic support member 43 is supported such that the end on the upper cover side is fixed and the rear cover side is free. A buffer member 50 protruding upward is provided at the end of the elastic support member 43 on the rear cover side. The buffer member 50 may be provided closer to the upper cover than the end of the elastic support member 43 on the rear cover side.

  The elastic support member 43 has the rear cover side facing the inner surface of the rear cover 20 so that the buffer member 50 is kept in contact with the inner surface of the rear cover 20 in the working posture during the tilling work. It is attached so as to extend linearly or slightly downwardly. When the rear cover 20 is in a working posture, the rear cover 20 rotates rearward with respect to the upper cover 15 and extends obliquely downward with a small inclination angle θ.

  The rear side of the cover body 30 attached to the rear end portion of the upper cover 15 extends along the back surface side of the elastic support member 43 and is attached to the front end portion of the elastic support member 43. The rear side of the cover body 30 is attached so as to have a larger deflection than the elastic support member 43 when the rear cover 20 is in the working posture. For this reason, the rear side of the cover body 30 largely protrudes to the rotary work body 11 side as the rear cover 20 rotates to the rotary work body 11 side as the work machine is lifted when the work machine turns. As shown in FIG. That is, when the cover body 30 bends toward the rotary working body 11, the greatly bent portion moves to the vicinity of the rotation locus of the tip of the tilling claw 12 of the rotary working body 11.

  FIG. 5 shows a cross-sectional view of the rear end portion of the cover body 30 to which the buffer member 50 is attached. As shown in FIG. 5, the rear end portion of the cover body 30 is connected to the elastic support member 43. A buffer member 50 is screwed into a front end portion of a bolt 51 that is inserted through the rear end portion, and is fixed to the rear end portion of the elastic support member 43.

  The buffer member 50 is formed of an elastic material such as rubber, and includes a cap-shaped main body portion 52 and a nut portion 53 that is inserted into the cap-shaped main body portion 52 and screwed into the bolt 51. Has been. The cap-shaped main body portion 52 is provided with a hole 52a into which the nut portion 53 can be inserted, and a tip portion of the cap-shaped main body portion 52 is provided with an abutting portion 52b that protrudes outward and is formed in a disk shape. It has been. As the work implement itself is lifted during turning of the work implement or the like, the buffer member 50 is moved so that the front end portion of the elastic support member 43 is moved to the rear portion as the rear cover 20 shown in FIG. It has the function of contacting the inner surface of the cover 20 so as not to generate a loud sound, and the function of transmitting the vibration received by the rear cover 20 from the farm field to the cover body 30 during the tilling work of the work implement.

  According to the tilling work machine 1 configured as described above, as shown in FIG. 1, the front end portion of the cover body 30 is movably supported via the support member 23, and the intermediate portion of the cover body 30 has the collar 32. Since the rear end portion of the cover body 30 is connected to the elastic support member 43, the portion for fixing the cover body 30 to the cover can be almost eliminated. In addition, when the tilling work machine 1 continuously plows the soil in the field released from the rotary work body 11 against the cover body 30 extending toward the rear cover 20 during the plowing work, the rear side of the cover body 30 is elastic. The support member 43 and the rear cover 20 are bent. As the elastically deformable elastic support member 43 returns to the original position, the rear side of the cover body 30 also returns to the original position, and this series of operations is continuously performed. Therefore, the cover body 30 can be vibrated. At this time, the cover body becomes an antinode of vibration, and the amplitude of vibration increases. Therefore, even if the soil released from the rotary working body is not attached to the cover body, this vibration can blow off the released soil or weaken the adhesive force. For this reason, it is possible to prevent the soil released from the rotary working body 11 from adhering to the cover body 30.

  Further, during the plowing operation, the rear cover 20 that moves on the surface of the field is subject to vibration when moving on the surface of the field. This vibration is transmitted to the cover body 30 via the rear cover 20 and the buffer member 50. For this reason, the cover body 30 can more effectively prevent soil from adhering to the cover body 30 by vibration caused by the collision of the soil released from the rotary working body 11 and vibration transmitted from the rear cover 20. it can.

  Further, when the soil in the field released from the rotary work body 11 continuously collides with the cover body 30 extending to the inside of the upper cover 15 during the tilling work, the cover that is supported so as to be able to come into contact with and separate from the upper cover 15. The body 30 bends toward the upper cover 15, and the energy of the released soil can be reduced to prevent the soil from being attached to the cover body 30. Further, when the soil in the field released from the rotary work body 11 continuously collides with the cover body 30 protruding from the front end portion of the upper cover 15, the cover body 30 is bent upward together with the support member 23 and released. By reducing the energy of the soil, the non-attachment of the soil to the cover body 30 can be prevented.

  When the rear cover 20 is rotated toward the rotary work body 11 as the work implement is lifted, for example, when the work implement is turning, the elastic support member 43 is interposed via the buffer member 50 as shown in FIG. The distal end side is pushed to the rotary working body 11 side and the elastic support member 43 is bent to the rotary working body 11 side, and the cover body 30 is bent in a convex shape to the rotary working body 11 side. For this reason, the outer surface bent in a convex shape of the cover body 30 is deformed so as to extend, and the soil not attached to the outer surface can be dropped. Further, the bent cover body 30 can come into contact with the tilling claws 12 shown in FIG. 2 provided on the rotary working body 11 and the soil not attached to the cover body 30 can be dropped. For this reason, the soil which did not adhere to the cover body 30 can be dropped effectively.

  Further, the front end portion of the cover portion 30 is connected to the upper cover 15 via the support member 23, the collar 26 ', the bolt 24', and the nut 25 'shown in FIG. The parts are connected via a collar 32, bolts 34, and nuts 25 '' shown in FIG. 3B, and the rear end part of the cover part 30 includes bolts 51, elastic support members 43, and buffer members 50 shown in FIG. All the parts have a simple structure and include general-purpose products. For this reason, even if it provides the cover part 30 in the tillage working machine 1, the increase in cost can be suppressed.

The explanatory view which looked at the tillage working machine concerning one embodiment of the present invention from the side is shown. The side view of the tillage working machine concerning one embodiment of the present invention is shown. The cover attachment structure provided in the tillage working machine concerning one embodiment of the present invention is shown, The figure (a) is a sectional view of the attachment structure of the front end part of a cover object, The figure (b) It is sectional drawing of the attachment structure of the intermediate part of a cover body. The side view for demonstrating the attachment structure of the back side of the cover body provided in the tilling work machine concerning one embodiment of this invention is shown. A side view is shown. The expanded sectional view of the part shown by arrow A of FIG. 4 is shown. The explanatory view which looked at the tillage working machine concerning one embodiment of the present invention from the side is shown. Sectional drawing of the cover body provided in the conventional tillage working machine is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tillage working machine 5 Airframe 11 Rotary work body 15 Upper cover 20 Rear cover 23 Support member 30 Cover body 43 Elastic support member 50 Buffer member

Claims (4)

A rotary work body rotatably provided on the machine body, an upper cover that covers the upper side of the rotary work body, covers the back side of the rotary work body, and is supported by the rear end portion of the upper cover so as to be vertically rotatable. In the tilling machine with the rear cover made,
A flexible cover body extending from the front end of the upper cover to the front side of the rear cover on the inner surface side of the upper cover and the rear cover;
An elastic support member disposed along the inner surface of the rear cover from the upper cover between the surface of the cover body and the inner surface of the rear cover;
The cover member has at its rear end, said coupled to the elastic support member, Ri separable freely der directly or indirectly to the inner surface of said rear cover,
An intermediate portion in the front-rear direction of the cover body is connected to the upper cover together with a front end portion of the elastic support member, and vibrates so that a portion of the cover body on the rear side of the portion connected to the upper cover becomes an antinode. Is possible
Tillage work machine characterized by that.   2. The support member according to claim 1, wherein a flexible supporting member is fixed to the upper cover so as to protrude from a front end portion of the upper cover, and the cover body is supported on a distal end portion of the supporting member. Tillage work machine.   The tilling work machine according to claim 1 or 2, wherein a buffer member is provided on a surface of the elastic support member on a rear cover side.   The tilling work machine according to claim 3, wherein the elastic support member makes the buffer member contact the inner surface of the rear cover.

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