JP2018174779A - Claw fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a claw fitting device capable of suppressing loosening of a nut.SOLUTION: Fitting means 36 includes a set bolt 51, a plurality of nuts 53, and a plate 54, The set bolt 51 has a plurality of screw shaft parts 57. The nuts 53 are screwed with the screw shaft parts 57, respectively. The plate 54 has a plurality of insertion holes 54a into which the screw shaft parts 57 are inserted. The set bolt 51 has a proximal region 56 formed tabularly. The plate 54 is formed into a tabular shape thicker than the proximal region 56.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a claw attachment device for attaching a claw to a claw attachment portion of a farm work machine.

  BACKGROUND ART Conventionally, there is known a cultivating nail described in Patent Document 1 below, for example.

  This conventional tilling nail is attached by a set bolt and a nut having a plurality of screw shaft parts to a flange part which is a nail attachment part provided on a rotating shaft of agricultural work. That is, holes for bolts are respectively provided in the tilling claw and the flange portion, and a nut is screwed to a screw shaft portion respectively inserted in the holes for both bolts. In addition, as for the set bolt, a plurality of screw shaft portions are integrated by the base, so that the anti-rotation function is improved. And the tilling work of a field is performed by the tilling nail | claw which rotates with the rotating shaft of a farm work machine.

JP, 2011-135899, A

  However, in the above-described conventional configuration, the nuts are individually screwed with respect to the screw shaft, and only a spring washer or the like is interposed between the nut and the flange. Therefore, for example, when a large load is applied to one screw shaft portion by force receiving a force during the tilling operation, etc., the screw shaft portion may be inclined or shifted by the clearance between the bolt hole and the screw shaft portion. Then, the nut also follows and moves, and it is not easy to suppress these inclination and deviation. Therefore, it is required to suppress the loosening of the nut due to the inclination and the deviation.

  This invention is made in view of such a point, and an object of this invention is to provide the nail | claw attachment apparatus which can aim at suppression of looseness of a nut.

  A claw attachment device according to the present invention is a claw attachment device for attaching a claw to a claw attachment portion of a farming machine, and includes a base and a screw body having a plurality of screw shaft portions provided on the base; A plurality of nuts each of which is screwed to a portion, and a nut locking member having a plurality of insertion holes through which the screw shaft portion is inserted.

  According to the present invention, looseness of the nut can be suppressed.

It is a front view showing the state where a nail was fixed to a nail attachment part by a nail attachment device of a 1st embodiment of the present invention. It is a side view which shows the nut locking member of the same nail | claw attachment apparatus. It is a side view which shows the state by which the nail | claw was fixed to the nail | claw attachment part by the same nail | claw attachment apparatus. It is a side view of a farm work machine provided with the same. It is a front view which shows the state by which the nail | claw was fixed to the nail | claw attachment part by the nail | claw attachment apparatus of the 2nd Embodiment of this invention. It is a side view which shows the nut locking member of the same nail | claw attachment apparatus. It is a side view which shows the state by which the nail | claw was fixed to the nail | claw attachment part by the same nail | claw attachment apparatus. It is a front view which shows the state by which the nail | claw was fixed to the nail | claw attaching part by the nail | claw attachment apparatus of the 3rd Embodiment of this invention. It is a side view which shows the nut locking member of the same nail | claw attachment apparatus. It is a side view which shows the state by which the nail | claw was fixed to the nail | claw attachment part by the same nail | claw attachment apparatus. It is a side view which shows the nut locking member of the nail attachment device of a 4th embodiment of the present invention.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  In FIG. 4, reference numeral 1 denotes a farm work machine, and this farm work machine 1 is connected to the rear of a tractor (not shown) which is, for example, a traveling vehicle, and moves the farmland forward (traveling direction) by traveling the tractor. It is a rotary cultivator (cultivator) that performs leveling work (agriculture work).

  The agricultural work machine 1 is an airframe 2 detachably connected to a three-point link portion at the rear of the tractor, and a tilling operation while rotatably provided on the airframe 2 and rotating in a predetermined direction (for example, a rotation direction in the downcut direction). And a leveling body (flat plate) 4 provided rotatably on the machine body 2 in the vertical direction and performing a leveling operation behind the cultivation body 3.

  The airframe 2 has a three-point connecting portion (traveling vehicle connecting portion) 11 detachably connected to a three-point link portion at the rear of the tractor. The three-point connecting portion 11 is configured of one top mast 12 and two lower arms 13 and the like in a pair of left and right.

  In addition, the machine body 2 has a transmission case portion 17 which is a shaft holding portion that rotatably holds the input shaft 16 in the front-rear direction. On the left and right sides of the transmission case portion 17, the inner end portion of a frame pipe portion 18 which is a frame portion extending in the left and right direction is attached. The input shaft 16 is connected to the PTO shaft of the tractor via a joint (not shown).

  Further, a chain case portion 19 which is a box-like cultivation body support portion is attached to an outer end portion of the left side frame pipe portion 18. A bracket portion (not shown) which is a plate-like cultivation body support portion is attached to the outer end portion of the right side frame pipe portion 18. The tilling body 3 is rotatably mounted between the chain case portion 19 and the bracket portion which are separated from each other. A side cover plate 20 which is a side plate portion is fixed to the chain case portion 19 and the bracket portion.

  Further, the airframe 2 has a tilling cover portion 21 covering the upper portion of the tillage body 3, and the ground adjusting body 4 can be vertically rotated about a shaft 22 in the left and right direction at the rear end portion of the tilling cover portion 21. Provided in In addition, between the leveling body 4 and the machine body 2, the contact pressure adjustment means 23 which adjusts the contact pressure of the leveling body 4 with respect to a tow scene is constructed. Further, a gauge wheel 24 is provided at the front of the fuselage 2.

  The tillage body 3 has a tillage shaft 31 which is a rotation shaft in the left-right direction that rotates based on the power from the input shaft 16 side. The tilling shaft 31 has an axial main body portion 32 which is elongated in the left-right direction, and flange portions 33 which are a plurality of plate-like claw attachment portions provided in a plurality of places of the axial main body portion 32. . Then, each flange portion 33 is subjected to a cultivating operation while rotating toward a predetermined rotation direction (arrow direction in the figure) centering on the rotation center axis X (rotation center) in the left-right direction by rotation of the tillage shaft 31 Plowing claws 35, which are a plurality of claws (claws for agricultural work), are detachably attached by attachment means 36, which are claw attachment devices (claw attachment devices for agricultural work).

  As shown in FIGS. 1 to 4, in each flange portion 33, a plurality of bolt holes 41 to which the tilling claws 35 are attached by the attachment means 36 are formed penetrating on both side surfaces. A plurality of, for example, two bolt holes 41 are formed for each of the tilling claws 35. These bolt holes 41 are formed, for example, in a round hole shape. In the present embodiment, a plurality of, for example, four tilling claws 35 are attached to each flange portion 33 by the attachment means 36 respectively.

  In the tilling claw 35, a plurality of bolt holes 43 corresponding to the bolt holes 41, that is, the same number of bolt holes 43 as the bolt holes 41 are formed through the front and back surfaces at the position of the base (base end). In the tilling claw 35, a bladed portion 45 is formed along the edge directed in the rotational direction. The tilling claws 35 are for right and left, and the tilling claws 35 for the right and the tilling claws for the left 35 are curved symmetrically in a state of being attached to the flange portion 33 when viewed from the rear in the traveling direction The basic configuration is the same except for the points. In addition, with respect to the flange portion 33, the right tillage claws 35 and the left tillage claws 35 are alternately attached in the rotational direction. In the present embodiment, the right-side tiller 35 and the left-side tiller 35 are attached two by two to the flange portion 33, and the right-side tiller 35 and the left-side tiller 35 are mutually attached It is attached to the side opposite to flange part 33 (refer to Drawing 3). And in the state where this tilling claw 35 is attached to the flange portion 33 of the tilling shaft 31 by the attachment means 36, the tilling operation is performed while rotating in the arrow direction in the figure about the rotation center (rotation center axis X) ( See Figure 4).

  The bolt hole 43 has, for example, an equal (including approximately equal) hole diameter to the bolt hole 41.

  The attachment means 36 includes a set bolt 51 which is a screw body (male screw body). The attachment means 36 comprises a plurality of washers 52. The mounting means 36 comprises a plurality of nuts 53. The attachment means 36 includes a plate (a washer) 54 which is a nut locking member.

  The set bolt 51 includes a base 56 and a plurality of screw shafts 57 provided on the base 56. In the present embodiment, the set bolt 51 is provided by, for example, connecting a plurality of bolts 58 by a connecting member (connecting plate) 59 which constitutes the base 56.

  The base 56 is formed of, for example, a single plate (coupling member 59) made of a predetermined metal material. That is, the base 56 is formed in a plate shape. The base portion 56 is formed in a somewhat elongated shape and has, for example, a fixed width (including a substantially fixed width), and both ends in the longitudinal direction are arc-shaped. In the present embodiment, the base portion 56 is located on the same side as the tilling claw 35 with respect to the flange portion 33.

  The plurality of screw shaft portions 57 are provided on the same side with respect to the base portion 56 so as to protrude in parallel with each other (including substantially parallel). A plurality of screw shaft portions 57 are provided, for example, two each in the present embodiment, for each of the tilling claws 35 (for each of the attachment means 36). Each screw shaft portion 57 is provided with a screw groove 57a in which a nut 53 is screwed. The screw groove 57a is provided, for example, on the outer peripheral surface of the screw shaft 57, from at least the tip of the screw shaft 57 to the middle in the longitudinal direction.

  The bolt 58 is, for example, a hexagonal bolt, and integrally includes a hexagonal columnar bolt head 61 and a cylindrical screw shaft portion 57 coaxially (including substantially coaxial) with the bolt head 61. Have.

  A plurality of bolts 58 are fixed to the coupling member 59 in a detent manner. For example, in the present embodiment, the coupling member 59 is knurled to the proximal end side of each screw shaft portion 57, but even if the bolt head 61 of each bolt 58 is welded and fixed Good.

  The washer 52 is an annular member having a hole 52 a through which the screw shaft 57 is inserted. That is, a plurality of washers 52 are provided corresponding to the screw shaft portions 57 (bolts 58) of the set bolt 51, in other words, a plurality of the washers 52 are the same number as the screw shaft portions 57 (bolts 58). Each washer 52 is a loosening suppressing member which is interposed between the plate 54 and each nut 53 and suppresses the loosening of the nut 53 with respect to the screw shaft portion 57. The washer 52 is attached to each screw shaft portion 57 (each nut 53) of the set bolt 51. For example, a spring washer is suitably used as the washer 52.

  The nut 53 is, for example, a hexagonal nut, and is a fastening member which is screwed to each of the screw shaft portions 57 of the set bolt 51 to fasten the flange portion 33 and the cultivating claw 35. That is, the nut 53 is provided with a plurality corresponding to the screw shaft portion 57 (bolt 58), in other words, a plurality of the same number as the screw shaft portion 57 (bolt 58). Therefore, in the present embodiment, a plurality of, for example, two nuts 53 are provided for each of the tilling claws 35 (for each of the attachment means 36).

  The plate 54 is a collective member that gathers (connects) the plurality of screw shaft portions 57 of the set bolt 51 on the tip end side (nut 53 side). In the present embodiment, the plate 54 unites (connects) the two screw shaft portions 57. The plate 54 is formed of, for example, a single plate made of a predetermined metal material. Similar to the base 56 (coupling member 59), the plate 54 is slightly elongated and formed, for example, in a fixed width (including a substantially fixed width), and both ends in the longitudinal direction are arcs. The plate 54 includes a plurality of insertion holes 54 a through which the screw shaft portion 57 of the set bolt 51 is inserted. That is, in the present embodiment, each plate 54 has a plurality corresponding to the screw shaft portion 57 (bolt 58) of the set bolt 51, in other words, a plurality of screw shafts 57 (bolt 58) and a plurality of the same number. In the embodiment, two insertion holes 54a are respectively formed. In the present embodiment, each insertion hole 54 a is formed in a round hole having a diameter equal to (including the same as) the screw shaft 57, but the diameter slightly larger than the diameter of the screw shaft 57 You may form in the round hole shape of a dimension. Each insertion hole 54a is formed by penetrating the positions in the vicinity of both ends in the longitudinal direction of the plate 54 on both side surfaces (see FIGS. 1 and 2). Further, in the present embodiment, for example, each insertion hole 54a is formed to have a hole diameter equal to (including approximately equal to) the holes 41 and 43 for bolts. The plate 54 is formed such that the plurality of screw shaft portions 57 of the set bolt 51 pass from the plurality of insertion holes 54 a to the nut 53 side. Each insertion hole 54a also includes, for example, one formed by cutting a portion including the outer edge of the plate 54. Further, as shown in FIG. 1, the plate 54 has a thickness b larger than that of the base 56, preferably twice or more the thickness a of the base 56 (b ≧ 2 · a). Each plate 54 is sandwiched between the nut 53 and the flange portion 33, more specifically between the washer 52 and the flange portion 33 in the present embodiment. Therefore, in the present embodiment, the plate 54 is disposed on the opposite side to the tilling claw 35 with respect to the flange portion 33 and on the opposite side to the base 56 of the set bolt 51 with respect to the flange 33 and the tilling claw 35 It is done.

  When the tilling claw 35 is fixed to the flange portion 33, the nut 53 is screwed into the screw groove 57a of the screw shaft portion 57 of the assembled bolt 51, and as a result, the flange portion 33 is abutted via the washer 52 and the plate 54. The cultivating claw 35 and the flange portion 33 of the cultivating shaft 31 are held between the nut 53 and the base 56 (coupling member 59) of the set bolt 51 in contact with each other.

  Next, the case where the tilling claw 35 is attached to the flange portion 33 of the tillage shaft 31 using the attachment means 36 will be described.

  After the bolt hole 41 of the flange portion 33 of the tillage shaft 31 and the bolt hole 43 at the base end side of the tillage claw 35 are made to face each other, one of the flange portion 33 is The screw shaft portions 57 of the set bolts 51 are respectively inserted from the side (the left side in FIG. 1).

  Then, the tip end side of each screw shaft portion 57 is inserted into the insertion hole 54a of the plate 54 and the hole portion 52a of the washer 52 on the other side (right side in FIG. 1) of the flange portion 33, and then screwed using a tool not shown. The two nuts 53 are screwed into the screw groove 57a of the shaft 57, respectively.

  As a result, the flange portion 33 and the tillage claw 35 overlapping with each other form the nut 53 in contact with the flange portion 33 via the washer 52 and the plate 54 and the base 56 of the set bolt 51 in contact with the tillage claw 35 (coupling member 59 And the tilling claw 35 is fixed to the flange portion 33 of the tilling shaft 31 with a desired fixing force.

  When the tilling claw 35 is removed from the flange portion 33 at the time of replacement of the tilling claw 35 or the like, the nut 53, the washer 52 and the plate 54 are removed from the screw shaft portion 57 of the assembled bolt 51 Can be easily released.

  Then, according to the attachment means 36, the plurality of screw shaft portions 57 of the set bolt 51 are respectively inserted into the insertion holes 54a of the plate 54, and the nut 53 is screwed to the screw shaft portion 57. When the shaft portion 57 receives an external force and tries to move, for example, tilt (laterally) or shift in the lateral direction due to the clearance with the bolt holes 41 and 43, the screw shaft portion 57 has a thickness of the plate 54 When the screw shaft portion 57 is difficult to incline by being positionally restricted in a wide area in the axial direction, and the screw shaft portion 57 abuts on the inner surface of the insertion hole 54 a of the plate 54, the plate 54 and other screw shafts The portion 57 is also interlocked to resist and suppress movement such as inclination and lateral displacement. As a result, it is possible to prevent the nut 53 from loosening due to these movements.

  In particular, by making the thickness of the plate-like plate 54 larger than the thickness of the base 56 of the plate-like set bolt 51, the position of the plate 54 over a wider area in the axial direction with respect to the plurality of screw shaft portions 57 Since the restriction can be made and the rigidity is higher than the base 56 of the assembled bolt 51, the screw shaft portion 57 of the assembled bolt 51 can be made more difficult to move.

  Further, when the tilling claw 35 is fixed to the flange portion 33, the tilling claw 35 and the flange portion 33 are held from both sides by the nut 53 in contact with the flange portion 33 via the washer 52 and the base 56 of the assembled bolt 51. Therefore, for example, even if an external force repeatedly acts on the tilling claw 35, the plate 54 is not easily deteriorated. Therefore, it is possible to suppress a decrease in the fixing force of the tilling claw 35 by the attachment means 36, to appropriately maintain the fixing state of the tilling claw 35 on the flange portion 33, and to make the nut 53 more difficult to loosen.

  By making the insertion hole 54a of the plate 54 a diameter dimension equal to (approximately equal to) the screw shaft portion 57, the effect of restricting the movement of the screw shaft portion 57 is improved, and the nut 53 can be more effectively locked. Further, the insertion hole 54a can be formed to increase the clearance with respect to the screw shaft portion 57 in consideration of the workability of attachment of the tilling claw 35 to the flange portion 33 by the attachment means 36. Therefore, the hole diameter of the insertion hole 54a of the plate 54 can be arbitrarily changed in consideration of these effects, and is preferably equal to or less than at least one of the holes 41 and 43 for bolts.

  As in the second embodiment shown in FIGS. 5 to 7, the attachment means 36 may be provided with three screw shaft portions 57 in one set of bolts 51. That is, the set bolt 51 may be configured by connecting three bolts 58 by the connecting member 59. In other words, the attachment means 36 may be provided with three screw shaft portions 57, washers 52 and nuts 53 for one tilling claw 35. In this case, three insertion holes 54 a of the plate 54 are also provided corresponding to the number of screw shaft portions 57.

  As in the third embodiment shown in FIGS. 8 to 10, the attachment means 36 may be provided with four screw shafts 57 in one set of bolts 51. That is, the set bolt 51 may be configured by connecting four bolts 58 by the connecting member 59. In other words, the attachment means 36 may be provided with four screw shaft portions 57, washers 52 and nuts 53 for one tilling claw 35. In this case, four insertion holes 54 a of the plate 54 are also provided corresponding to the number of screw shaft portions 57.

  In the second and third embodiments, by providing more screw shaft portions 57 in the set bolt 51, the plurality of other screw shaft portions 57 with respect to the movement of one screw shaft portion 57 and the nut 53 can be obtained. And, the nut 53 can be resisted together with the plate 54, and the loosening of the nut 53 can be suppressed more effectively. Therefore, although not shown, the attachment means 36 can also constitute five or more screw shafts 57 in one set of bolts 51.

  In each of the above embodiments, the mounting means 36 is configured such that the base 56 of the set bolt 51 and the tilling claw 35 are located on the same side with respect to the flange portion 33. 35 may be located on the same side as the nut 53. That is, the tilling claw 35 may be sandwiched between the flange portion 33 and the plate 54. In other words, the plate 54 can be arranged to abut directly on either the flange portion 33 or the tilling claw 35.

  Further, as long as the plate 54 includes the plurality of insertion holes 54 a corresponding to the plurality of screw shaft portions 57 of the set bolt 51, the shape of the other portion can be set arbitrarily. For example, as in the fourth embodiment shown in FIG. 11, the plate 54 may be shaped such that the longitudinal middle portion 62 is narrower than the peripheral portions 63, 63 of the insertion hole 54a. Not limited to this shape, other shapes can also be adopted.

  The tilling claws 35 can be used not only for rotary tillers but also for various kinds of farming machines that carry out farming operations involving tilling work.

  The attachment means 36 can also be applied to claws for agricultural work other than the tilling claw 35, for example, scraping claws attached to a flange portion provided on the rotation shaft. Therefore, the agricultural work machine 1 is not limited to a rotary tiller, but may be a scratcher or the like.

1 Farm work machine
33 Flange that is the claw mounting part
35 claws
36 Mounting means that is a claw mounting device
51 Bolts which are a screw body
52 washer
52a hole
53 nuts
54 Plate that is a nut locking body
54a insertion hole
56 base
57 Screw shaft

Claims (3)

A nail attachment device for attaching a nail to a nail attachment portion of a farming machine,
A screw body having a plurality of screw shafts;
A plurality of nuts respectively screwed to the screw shaft;
And a nut fixing member having a plurality of insertion holes through which the screw shaft portion is inserted. The screw body has a plate-shaped base,
The claw attachment device according to claim 1, wherein the nut locking member is formed in a plate shape having a thickness larger than that of the base. The claw mounting device according to claim 1 or 2, further comprising: a washer having a hole through which the screw shaft is inserted.

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