JP2018186787A - Agricultural implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural implement capable of improving durability of a tumbler.SOLUTION: An agricultural implement 1 includes a tillage body for performing a tillage work, a ground leveling body 4 for performing a ground leveling work, and grounding pressure adjustment means 31 for adjusting a grounding pressure of the ground leveling body 4. The grounding pressure adjustment means 31 has a connection rod 32, and a tumbler 33 which is a rod-inserted body inserted slidably by the connection rod 32. The tumbler 33 comprises a hardened metal material which is harder than a metal material constituting the connection rod 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an agricultural machine including a ground pressure adjusting means.

  DESCRIPTION OF RELATED ART Conventionally, the agricultural working machine described in the following patent document 1, for example is known.

  This conventional farming machine includes a cultivated body that performs a plowing work, a leveling body that performs leveling work behind the cultivated body, and a ground pressure adjusting means that adjusts a ground pressure of the ground leveling body. The means includes a connecting rod and a rod insertion body (tumbler) through which the connecting rod is slidably inserted.

JP 2005-218316 A

  However, in the conventional agricultural working machine, regarding the rod insertion member of the ground pressure adjusting means, despite the fact that the connecting rod is a member that slides, no measures against wear are taken, and the durability is good. I can't say that.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can aim at the durable improvement of the rod insertion body of a ground pressure adjustment means.

  A farm machine according to the present invention includes a cultivating body that performs a tilling work, a leveling body that performs a leveling work behind the cultivating body, and a ground pressure adjusting unit that adjusts a ground pressure of the ground leveling body, The adjusting means includes a connecting rod and a rod insertion member through which the connecting rod is slidably inserted, and at least a portion of the rod insertion member that contacts the connecting rod is less than the connecting rod. Is also hard.

  ADVANTAGE OF THE INVENTION According to this invention, durability improvement of the rod insertion body of a ground pressure adjustment means can be aimed at.

It is a top view of the agricultural working machine which concerns on one embodiment of this invention. It is a side view (at the time of work) of an agricultural working machine same as the above. It is a side view (a leveling body is the lowest position) of an agricultural working machine same as the above. It is a side view of the agricultural working machine same as above (the leveling body is lifted and fixed). It is a top view of the ground pressure adjustment means of a farm working machine same as the above. It is a figure which shows a tumbler, (a) is a front view, (b) is a bottom view, (c) is a side view. It is a side view which shows a stopper body.

  An embodiment of the present invention will be described with reference to FIGS.

  In the figure, 1 is an agricultural machine, and this agricultural machine 1 is connected to the rear part of a tractor (not shown) which is a traveling vehicle, for example, and farming while moving the field forward (traveling direction) by traveling of the tractor, For example, plowing work is performed.

  The agricultural machine 1 includes a machine body 2 that is detachably connected to a three-point link part (agricultural machine lifting part) at the rear of the tractor, a tiller body 3 that is rotatably provided on the machine body 2 and performs a tilling work, and an aircraft body 2. And a leveling body 4 that is provided so as to be pivotable in the vertical direction around a horizontal axis (rotation fulcrum) 5 and that performs leveling work behind the tillage body 3.

  The airframe 2 has a three-point connecting portion 6 that is detachably connected to the three-point link portion of the tractor. The three-point connecting portion 6 is formed by a top pin 8 at the tip of the mast 7 and left and right lower pins 9. It is configured. The airframe 2 has an input shaft 10 that is detachably connected to the PTO shaft of the tractor via a joint. The input shaft 10 is rotatably provided on the mission case 11.

  The transmission case 11 has inner ends of the left and right frame pipes 12 attached thereto, the left frame pipe 12 has a chain case 13 attached thereto, and the right frame pipe 12 has a bracket 14 attached thereto. Between the chain case 13 and the bracket 14, a cultivating body 3 for cultivating while being rotated by power from the input shaft 10 side is installed. The cultivating body 3 has a cultivating shaft 16 that is a rotation axis in the left-right direction and a plurality of cultivating claws 17.

  The machine body 2 has a tilling part cover 21 that covers the upper part of the tilling body 3, and the leveling body 4 is attached to the tilling part cover 21 via a plurality of hinges 23 so as to be vertically rotatable. The leveling body 4 includes a leveling plate (leveling body main body) 26 for leveling work, side plates 27 fixed to both left and right ends of the leveling plate 26, and a back plate erected on the back surface of the leveling plate 26. And 28. A pair of back plates 28 is provided on each of the left and right sides of the leveling plate 26.

  In addition, the farm work machine 1 includes a plurality of (for example, two on the left and right) ground pressure adjusting means 31 for adjusting the ground pressure of the leveling body 4 with respect to the farm scene, and the ground pressure adjusting means 31 includes the body 2 and the leveling body 4. It is built between. As shown in FIG. 5 and the like, the contact pressure adjusting means 31 includes a cylindrical connecting rod 32 that is elongated in the front-rear direction, and a tumbler 33 that is a rod insertion body through which the connecting rod 32 is slidably inserted. The first coil spring (pressing spring) 34 that is a first elastic member located in front of the tumbler 33 and the second coil spring (buffer spring) 35 that is a second elastic member located behind the tumbler 33 are provided. ing.

  The connecting rod 32 is rotatably attached to the U-shaped rod connecting portion 41 of the frame pipe 12 through a connecting pin 42 at the front end. An end collar 43 is attached to the rear end portion of the connecting rod 32. The connecting rod 32 has a plurality of adjustment holes 46, one fixing hole 47, and one holding hole 48.

  The first coil spring 34 is disposed on the outer periphery of the connecting rod 32 and is positioned between the first pin 51 and the tumbler 33. The second coil spring 35 is disposed on the outer periphery of the connecting rod 32 and is positioned between the second pin 52 and the tumbler 33.

  The tumbler 33 has a cylindrical shape (including a substantially cylindrical shape) having an axial direction in the left-right direction as shown in FIG. 6, and is rotatably attached to the back plate 28 of the leveling body 4. That is, the tumbler 33 that is a rotating body is rotatably inserted into the mounting hole 28 a of the back plate 28 and is prevented from being removed by the retaining ring 53. The retaining ring 53 is fitted into the retaining ring groove portion 54 of the tumbler 33.

  The tumbler 33 has a first spring contact surface 56 that contacts the first coil spring 34 on the front surface, and a rear second spring contact surface 57 that contacts the second coil spring 35 on the rear surface. These spring contact surfaces 56 and 57 are formed in a planar shape.

  Further, the tumbler 33 includes an insertion hole 61 extending in the front-rear direction through which the connecting rod 32 is slidably inserted, an oil supply hole 62 extending in the left-right direction communicating with the insertion hole 61, and an insertion hole 61. And a fixing hole 63 extending in the vertical direction in communication. The oil hole 62 has an elongated shape in a direction intersecting with the insertion hole 61 (the left-right direction that is the axial direction of the tumbler 33), and is formed from the center of one side surface of the tumbler 33 to the insertion hole 61. A thread groove 65 is formed in a portion of one side surface of the tumbler 33 in the oil supply hole 62. A grease nipple 66 for supplying lubricating oil to a gap portion (sliding portion) between the connecting rod 32 and the tumbler 33 is screwed into the screw groove 65 of the oil supply hole 62.

  Here, the connecting rod 32 and the tumbler 33 are both metal parts, but are made of different metal materials, and the entire tumbler 33 is harder than the connecting rod 32. That is, the tumbler 33 is made of only a hardened metal material that is harder than the metal material constituting the connecting rod 32, and the entire portion including the portion that contacts the connecting rod 32 is made of a hardened metal material. .

  Specifically, the metal material that integrally forms the connecting rod 32 is, for example, SS400 (120 to 140 Hv). On the other hand, the metal material which integrally constitutes the tumbler 33 is, for example, quenched S45C (HRC40). For this reason, the tumbler 33 has higher hardness than the connecting rod 32, is not easily worn, and has excellent durability.

  On the other hand, the tumbler 33 of the ground pressure adjusting means 31 is attached with a stopper body 71 for lifting the ground leveling body 4 and fixing it to a fixed position (maintenance position). As shown in FIG. 7, the stopper body 71 has a stopper pin 72 that is a fixing pin and an operation lever 73 for moving the stopper pin 72. During maintenance, the stopper pin 72 is inserted into the fixing hole 63 of the tumbler 33 and the fixing hole 47 of the connecting rod 32, so that the leveling body 4 is positioned and fixed at a desired lifting fixing position ( (See FIG. 4).

  Next, the operation and the like of the farm work machine 1 will be described.

  When the farm equipment 1 is connected to the rear portion of the tractor and the tractor travels, as shown in FIG. 2, the farm equipment 1 moves in the traveling direction together with the tractor, the tiller 3 performs the tillage work, and the leveling body 4 Perform leveling work. At this time, the leveling body 4 touches the field with the ground pressure adjusted by the ground pressure adjusting means 31 and performs leveling work. When the leveling body 4 rotates up and down, the tumbler 33 is connected to the connecting rod. It rotates about the rotation fulcrum P with respect to the leveling body 4 while sliding (contacting) along the outer peripheral surface of 32.

  Further, for example, during maintenance, the operator lifts the leveling body 4 to the lifting and fixing position and fixes it to the lifting and fixing position with the stopper pin 72 of the stopper body 71 as shown in FIG. In addition, when supplying lubricating oil to the gap portion between the connecting rod 32 and the tumbler 33 that slide with each other, an operator connects a grease gun (not shown) to the grease nipple 66, for example. Lubricating oil is injected from the grease nipple 66 into the oil supply hole 62.

  And according to the agricultural machine 1, the contact pressure adjusting means 31 has the connecting rod 32 and the tumbler 33 through which the connecting rod 32 is slidably inserted, and since the tumbler 33 is harder than the connecting rod 32, The tumbler 33 is not easily worn, and the durability of the tumbler 33 can be improved.

  The tumbler 33 has an oil supply hole 62 communicating with the insertion hole 61 through which the connecting rod 32 is inserted. By injecting the lubricating oil into the oil supply hole 62, the lubricating oil is connected to the connection rod 32 and the tumbler. The tumbler 33 can be effectively supplied to the gap between them, and the durability of the tumbler 33 can be effectively improved. Can be planned.

  Furthermore, since the oil injection hole 62 of the tumbler 33 has an elongated shape in a direction intersecting the insertion hole 61, the operator can easily inject lubricating oil from the side.

  In the above-described embodiment, the configuration in which the grease nipple 66 is attached to the oil supply hole 62 of the tumbler 33 has been described. However, the present invention is not limited to this. For example, the lubricating oil is supplied to the oil supply hole without using the grease nipple 66. You may make it supply to 62 directly.

  In addition, the configuration is not limited to the configuration in which the lubrication hole 62 is formed only on one axial side (left side portion) of the tumbler 33. For example, the configuration in which the lubrication hole 62 is formed on both axial sides of the tumbler 33 may be used. .

  Further, for example, only a portion of the tumbler 33 that is in contact (sliding contact) with the outer peripheral surface of the connecting rod 32 (a hole surrounding portion of the insertion hole portion 61) may be harder than the connecting rod 32.

  Further, for example, the tumbler 33 may be harder than the connecting rod 32, such as the connecting rod 32 made of SS material and the tumbler 33 made of stainless steel.

  Furthermore, the shape of the tumbler 33 is not limited to a cylindrical shape, and may be a rectangular parallelepiped shape, for example.

  The tumbler 33 is not limited to the structure directly attached to the back plate 28 of the leveling body 4. For example, the tumbler 33 can be rotated to the back plate 28 of the leveling body 4 via a pin welded to the back plate 28. You may make it attach.

1 Agricultural machine 3 Tillage body 4 Leveling body
31 Ground pressure adjustment means
32 Connecting rod
33 Tumbler, which is a rod insertion object
61 Insertion hole
62 Lubrication hole

Claims (4)

A plowing body for plowing work,
A leveling body that performs leveling work behind this tilled body,
A ground pressure adjusting means for adjusting the ground pressure of the leveling body,
The ground pressure adjusting means is
A connecting rod;
A rod insertion body through which the connecting rod is slidably inserted;
A farm working machine, wherein at least a portion of the rod insertion body that contacts the connecting rod is harder than the connecting rod. The agricultural implement according to claim 1, wherein the rod insertion body is made of a hardened metal material that is harder than the metal material constituting the connecting rod. The rod insert is
An insertion hole through which the connecting rod is slidably inserted;
The agricultural machine according to claim 1, further comprising an oil supply hole portion communicating with the insertion hole portion. The agricultural machine according to claim 3, wherein the oil supply hole has an elongated shape in a direction intersecting with the insertion hole.

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