JPH086402Y2 - Mounting structure of the front cover of the rotary cultivator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a mounting structure for a front cover of a rotary cultivator.

(Prior Art) In a conventional rotary cultivator, as shown in FIG. 5, at the front end of a main cover 111 that covers the upper part of the cultivating part, a holding member that holds the front cover 112 with the main cover 111. 120 was attached with bolts 121.

(Problems to be Solved by the Invention) In the above-described conventional structure, the head 122 of the bolt 121 holds the holding member.
Since it is exposed to the front side of 120, it is likely to be rusted due to the adhesion of rainwater, mud, etc., and it may be difficult to attach or detach the front cover 112. Also, it looked bad.

Therefore, it is conceivable to provide a covering member for the head portion 122 of the bolt 121. However, if the covering member is simply covered, the bolt may be liable to be loosened due to regulation of adhesion of rainwater, mud, and the like. Moreover, if the cover member is difficult to attach and detach, the front cover is difficult to attach and detach and replace.

In view of the above, it is an object of the present invention to provide a structure that can not only cover the head of the bolt but also prevent the bolt from loosening and that can be easily attached and detached.

(Means for Solving the Problem) The feature of the present invention is that a clamping member 20 for clamping the front cover 12 with the main cover 11 is provided at the front end of the main cover 11 which covers the upper part of the tilling part 10. When the head portion 22 of the bolt 21 is exposed by the front side of the holding member 20, the covering member 26 of the head portion 22 of the bolt 21 is attached.
Is attached to the holding member 20 so that it can be inserted and removed in the left-right direction and presses the head 22 of the bolt 21 from the front by its own elasticity, and the head of the bolt 21 is attached to the covering member 26.
The point is that a protrusion 32 is formed on the right and left sides of 22 to restrict the cover member 26 from coming off in the left and right direction.

(Operation) To attach the front cover 12 having the above-described configuration, first, the front cover 12 is sandwiched between the main cover 11 and the sandwiching member 20, and the sandwiching member 20 is attached to the main cover 11 with the bolt 21.

Next, the covering member 26 is inserted and attached to the holding member 20 from the left and right directions. At the time of this insertion, the projection 32 of the covering member 26 comes into contact with the head 22 of the bolt 21 to restrict the insertion of the covering member 26. This restriction causes the covering member 26 to elastically deform. Can be avoided. When the covering member 26 is completely attached, the head portion 22 of the bolt 21 is elastically pressed by the covering member 26, and the looseness of the bolt 21 is restricted. Further, since the protrusions 32 of the covering member 26 are located on the left and right sides of the head 22 of the bolt 21, even if the covering member 26 tries to come out to the left and right, the protrusion 32 and the head 22 are brought into contact with each other to prevent coming off. Done.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The side-drive type forward / reverse rotary cultivator 1 shown in FIG. 4 is mounted on an agricultural tractor (not shown) and towed. Cylindrical support arm 3
The machine frame is formed by and. A mast 15 for mounting with a tractor, a gauge body 16 and the like are attached to this machine frame. The chain case 4 is attached to one end of the support arm 3.
However, a side frame (not shown) is attached to the other end, and both ends of the pawl shaft 5 are supported by the chain case 4 and the side frame. A plurality of tilling claws 6 are attached to the claw shaft 5.

The power transmitted from the PTO shaft of the tractor to the power receiving shaft 7 protruding forward from the gear box 2 is transmitted to the gear in the gear box 2, the transmission shaft 8 in the support arm 3, and the chain in the chain case 4. It is transmitted to the pawl shaft 5 via the winding transmission mechanism. The rotation of the pawl shaft 5 forms a cultivating portion 10 for cultivating with the cultivating pawl 6.

The pawl shaft 5 can be switched between normal rotation in the direction of the arrow in the figure and reverse rotation in the opposite direction.

The upper part of the cultivated part 10 is covered by the main cover 11, the front part by the front cover 12, and the side part by the side cover 13.
The rear part is covered with a rear cover 14.

1 to 3 show the front cover 12 to the main cover 11 described above.
The mounting structure of is shown.

The main cover 11 has a two-layer structure including an upper plate 17 and a lower plate 18 made of steel plates. The upper plate 17 and the lower plate 18 are vertically separated from each other in the vicinity of the front end portions thereof, and the front end of the upper plate 17 is substantially vertical. The front surface of the bent portion is a front cover support surface 19. Further, the tips of the upper plate 17 and the lower plate 18 are superposed.
It should be noted that ribs are provided on the upper and lower plates 17 and 18 which are separated from each other vertically.
40 is inserted, and the rib 40 is spot-welded to the upper plate 17 and plug-welded to the lower plate 18. This rib 40
Prevents deformation of the lower plate 18 due to collision of soil during reverse cultivating.

A holding member 20 is attached to the front cover support surface 19 of the main cover 11 with a plurality of bolts 21. This holding member 20
The left and right widths of the main cover 11 and the front cover 12 are substantially the same, and the lower end is along the tip of the main cover 11. The upper end of the front cover 12 is clamped. The front cover 12 is used for scraping in this embodiment.

The bolts 21 are arranged apart from each other in the left-right direction, and their heads 22 are exposed to the front side of the holding member 20. This head
A spring washer 23 is provided between the holding member 20 and the holding member 20, a spacer 24 is provided between the holding member 20 and the front cover support surface 19 of the main cover 11, and a bolt 21 is provided on the back surface of the main cover 11. A nut 25 to be screwed is arranged.

Then, the covering member 26 of the head 22 of the bolt 21 is held by the holding member 20.
On the other hand, the head 22 of the bolt 21 is attached so that it can be inserted and removed in the left-right direction and the elasticity of the bolt 21 presses it from the front.

That is, the covering member 26 has a lateral width substantially the same as the sandwiching member 20, and in a side view, an abutting wall 27 abutting against the front surface of the head 22 of the bolt 21 and a rear end from the lower end of the abutting wall 27. The lower wall 28 that extends and is located below the head portion 22, the inclined wall 29 that extends rearward from the upper end of the abutting wall 27 upward, and the lower wall 28 that extends downward from the upper end of the inclined wall 29. And a retaining wall 30. Further, the upper end of the sandwiching member 20 is a locking portion 31 formed so as to be close to the front cover supporting surface 19 of the main cover 11, and between the locking portion 31 and the front cover supporting surface 19 of the main cover 11. The retaining wall 30 of the covering member 26 is inserted from the left and right direction. A notch 39 is formed in the side cover 13 so that the covering member 26 and the side cover 13 do not interfere with each other during this insertion. In the attached state where this insertion is completed, the contact wall 27 of the covering member 26 is
Is urged to elastically press the head portion 22 of the bolt 21 with the hooking portion of the hooking portion 31 with respect to the hooking portion 31 and the front cover support surface 19 as a fulcrum. Therefore, the contact wall 27 and the inclined wall
The angle formed by 29 and the angle formed by the inclined wall 29 and the retaining wall 30 are appropriately determined.

And, in order to prevent the covering member 26 from coming out from the attached state to the left and right, the contact wall 27 of the covering member 26 is
The protrusions 32 located on the left and right sides of the head 22 of the bolt 21 are integrally formed. As a result, even if the covering member 26 tries to come out, the protrusion 32 comes into contact with the head portion 22 of the bolt 21 so that the coming off is restricted. It should be noted that when the covering member 26 is inserted into the holding member 20, it can be avoided by elastically deforming the contact wall 27 forward so that the protrusion 32 does not contact the head 22 of the bolt 21. In this embodiment, since the outer peripheral surface of the protrusion 32 is a curved surface, the abutting wall 27 is elastically deformed by pressing the protrusion 32 strongly against the head 22 from the left and right when the protrusion 32 is inserted. Can get over the head 22.

(Effect of the Invention) According to the present invention, the head of the bolt that attaches the holding member of the front cover to the main cover is covered with the covering member to prevent rusting of the bolt, adhesion of mud, etc. There is no fear that it will take time.

Further, the covering member can prevent the bolt from loosening.

Further, the covering member can be attached and detached by simply inserting the covering member into the sandwiching member from the left and right directions, thereby facilitating the work.

In addition, the head of the bolt cannot be seen from the outside, so it looks good.

[Brief description of drawings]

FIG. 1 is a side view of a front cover mounting structure according to an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is a rotary tiller. FIG. 5 is a side sectional view of a mounting structure of a front cover according to a conventional example. 10 …… Tillage section, 11 …… Main cover, 12 …… Front cover, 20…
… Clamping member, 21 …… Bolt, 22 …… Head, 26 …… Coating member, 32 …… Projection part.

Claims (1)

[Scope of utility model registration request] 1. A main cover (11) for covering an upper part of a tilling part (10).
A clamping member (20) for clamping the front cover (12) with the main cover (11) is attached to the front end of the bolt by a bolt (21), and the head (22) of the bolt (21) is clamped by the clamping member (20). In the case of being exposed on the front side of the member (20), the covering member (26) of the head (22) of the bolt (21) can be inserted into and removed from the holding member (20) in the left-right direction and is elastic by itself. The head (22) of the bolt (21) is attached so as to be pressed from the front, and the bolt (21) is attached to the covering member (26).
Positioned on the left and right sides of the head (22) of the cover member (26)
A structure for mounting a front cover of a rotary cultivator, characterized in that a protrusion (32) for restricting the leftward and rightward movement of the is formed.