JPH0543802U - Mounting structure of tillage cover in rotary tiller - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent sideways shaking of the tillage cover. [Structure] A pawl shaft 33 is rotatably supported via bearing bodies 12 and 20 between lower parts of a transmission case 5 provided on one side of the rotary machine frame 7 and a side frame 6 provided on the other side thereof. , Comprises a cultivating part 36 by providing a cultivating claw 35 on the claw shaft 33, and side covers 39 covering the sides of the cultivating part 36 are provided on both left and right sides of a main cover 38 which covers the upper part of the cultivating part 36. It is equipped with a tilling cover 37 so that it can be rotated forward and backward,
In a rotary cultivator equipped with protective covers 29, 30 for protecting the sealing portion between the 33 and the bearing bodies 12, 20, annular bushes 61, 62 are fitted onto the bearing bodies 12, 20, and these bushes 61, 62 are fitted. , 62 are fitted with the pair of side covers 39 respectively so as to be rotatable around the axis of the pawl shaft 33, and the bushes 61, 62 are attached to the protective covers 29, 30 and the transmission case 5 or the side frame 6 respectively.
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Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for mounting a tilling cover in a rotary tiller.

[0002]

[Prior Art]

 Conventionally, for example, as disclosed in Japanese Utility Model Publication No. 54-42322, a pawl shaft is rotatably supported via a bearing case at a lower portion between left and right frames of a rotary machine frame, and a plowing pawl provided on the pawl shaft. There is a plowing cover that covers the outer circumference locus of the main cover and a rear cover that is attached to this main cover via a hinge.The plowing cover can be moved and fixed forward and backward depending on the working depth. According to this, it was possible to prevent soil from adhering and to change the hinge position depending on the depth of the plowing depth.

[0003]

[Problems to be solved by the device]

 By the way, although the conventional technique guides the tillage cover in the front-rear direction, the tillage cover may be so-called sideways because the lateral position is not regulated. Also, adjustment was difficult when bolted to prevent side shake.

An object of the present invention is to ensure the guidance of the tillage cover and prevent the tillage cover from moving sideways.

[0005]

[Means for Solving the Problems]

 The technical means of the present invention for solving this technical problem is to provide a bearing body between the lower part of the transmission case 5 provided on one left and right side of the rotary machine frame 7 and the side frame 6 provided on the other side. The claw shaft 33 is rotatably supported via 12, 20 and a tilling claw 35 is provided on the claw shaft 33 to form a tilling part 36, and both left and right sides of a main cover 38 that covers the upper part of the tilling part 36. Further, a tilling cover 37, which is provided with a side cover 39 that covers the side of the tilling part 36, is provided so as to be adjustable in forward and backward rotation, and protects a sealing portion between the pawl shaft 33 and the bearing bodies 12 and 20. In a rotary cultivator provided with protective covers 29,30, annular bushes 61,62 are fitted onto the bearing bodies 12,20, and the pair of side covers 39 are fitted on the bushes 61,62, respectively. The bushes 61 and 62 are attached by external fitting so that they can rotate around the center, and the bushes 61 and 62 are protected by covers 29 and 30 and the transmission case 5 or side frame 6 It is in the point of being sandwiched between.

[0006]

[Action]

 The cultivating cover 37 has side covers 39 on both left and right sides supported rotatably around the shafts with respect to the bushes 61, 62, and each bush 61, 62 is protected by the protective cover 29, 30 and the transmission case 5 or the side. It is sandwiched between the frame 6 and the bearing bodies 12, 20 and is fixed immovably in the left-right direction, and effectively prevents side shake of the side cover 39 to the tillage cover 37.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 3 and 4, reference numeral 1 denotes a side-drive rotary cultivator mounted on the rear part of the tractor via a three-point link mechanism, and a central gear case 3 having an input shaft 2 which is interlockingly connected to the PTO shaft of the tractor. From the left and right, support arms 4 are projected, and a transmission case 5 is fixed to the outer end of one support arm 4 and a side frame 6 is fixed to the outer end of the other support arm 4, and the rotary machine frame 7 is the main component. Has been done.

A pair of left and right top masts 8 are fixed to the upper part of the gear case 3, and a bracket 9 for connecting the top links of the three-point link mechanism is fixedly mounted between the lower parts of the top masts 8. Further, a support frame 10 to which a gauge wheel is attached is projected from the support arm 4 rearward, and a gauge wheel height adjusting means 11 is provided between the support frame 10 and the top mast 8.

As shown in FIG. 1, a bearing body 12 is provided below the transmission case 5. The bearing body 12 includes a cylindrical bearing holder 13 that penetrates the inner wall 5a of the transmission case 5 and has an axial center in the left-right direction that is fixed to the inner wall 5a, and a bearing 14 held in the bearing holder 13. The bearing holder 13 includes an oil seal 15 located on the side frame side of the bearing 14. A drive shaft 17 having a flange 16 at the base end is inserted into the oil seal 15 and the bearing 14 from the outside of the transmission case 5 and rotatably supported by the bearing body 12. A sprocket 18 of a chain transmission mechanism housed in the transmission case 5 is spline-fitted to the tip side of the transmission shaft 17, and the gear transmission mechanism from the input shaft 2 of the gear case 3 to the gear transmission mechanism in the case 3 and a support arm. Power is transmitted to the chain transmission mechanism in the transmission case 5 via the transmission shaft in 4 and the drive shaft 17 is rotationally driven. A dust cover 19 is provided between the oil seal 15 and the flange 16 of the drive shaft 17.

As shown in FIG. 2, a bearing body 20 is also provided on the lower portion of the side frame 6. The bearing body 20 has a structure similar to that of the bearing body 12 and includes a bearing holder 21, a bearing 22 and an oil seal 23. The bearing holder 21 penetrates the side frame 6 and is fixed to the frame 6. ing. A support shaft 25 having a flange 24 at the base end is rotatably supported on the bearing body 12 by being inserted into the oil seal 23 and the bearing 22 from the inner side of the side frame 6. A dust cover 26 is provided between the oil seal 23 and the flange 24 of the support shaft 25.

An outer end opening of the bearing holder 21 is closed by a cap body 27, and a protector 28 for protecting the holder 21 is provided on the outer side in the left-right direction of the bearing holder 21. The protector 28 is made of a plate material, and as shown in FIGS. 5 and 6, is located between the projecting portions 6a formed on the front and rear sides of the side frame 6 in the vertical direction, and the upper portion of the protector 28 is located on the side frame 6. It is fixed by bolts and also serves as a stopper for the cap body 27.

In FIGS. 1 to 4, a pawl shaft 33 is arranged between the bearing bodies 12 and 20, and the left and right ends of the pawl shaft 33 are provided with flanges 34, and a flange of the drive shaft 17 and the support shaft 25. It is attached and fixed to 16, 24, and the pawl shaft 33 is rotatably supported between the lower part of the transmission case 5 and the side frame 6. In addition, a large number of tilling claws 35 are fixedly mounted on the claw shaft 33, and the tilling claws 35 and the claw shaft 33 constitute a tilling section 36.

Further, protective covers 29, 30 for protecting the seal portion are fitted on the both bearing bodies 12, 20, respectively, to prevent winding of grass and adhesion of mud. Further, annular bushes 61, 62 are externally fitted and fixed to the bearing bodies 12, 20, and peripheral grooves 63, 64 are formed on the outer circumferences of the bushes 61, 62. Reference numeral 37 denotes a tilling cover that covers the tilling portion 36, including a main cover 38 that covers the upper portion of the tilling portion 36, side covers 39 that are provided on the left and right sides of the main cover 38 and that cover the sides of the tilling portion 36, and a main cover 38. The rear cover 40 is attached to the rear end of the rear cover so as to be rotatable up and down, and the front cover 41 covers the front upper part of the tiller 36.

The left and right side covers 39 include a front upper cover 42, a front lower cover 43, and a rear cover 44. An upper portion of the front upper cover 42 is fixed to an end portion of the main cover 38, and an upper portion of the front lower cover 43 is superposed on the inner surface of the lower portion and the front and rear portions thereof are bolted. Further, an engaging piece 45 is formed by cutting and raising in the front-rear halfway portion above the front lower cover 43, and the front upper cover 42 is inserted into the inner surface side of the engaging piece 45. Circular mounting holes 65, 66 are provided in the lower portions of the front lower covers 43 of the left and right side covers 39, respectively.

The peripheral edges 63, 64 of the bushes 61, 62 are slidably fitted to the opening edge portions of the mounting holes 65 of the front lower cover 43 of each side cover 39, whereby the side covers 39 are respectively pushed. The claw shaft 33 is rotatably fitted around the shafts 61 and 62 of the claw shaft 33. The bushes 61 and 62 are made of an elastic material such as synthetic resin, and the bushes 61 and 62 can be elastically deformed so that the opening edge portion of the mounting hole 65 of the side cover 39 can be fitted into the circumferential grooves 63 and 64. ing.

The bush 61 is sandwiched between the protective cover 29 and the inner wall 5 a of the transmission case 5, and the protective cover 29 is prevented from moving inward in the left-right direction by the retaining ring 67 fitted and fixed to the bearing holder 13. It is regulated. The bush 62 is sandwiched between the protective cover 30 and the side frame 6, and the protective cover 30 is restricted from moving inward in the left-right direction by a retaining ring 68 fitted and fixed to the bearing holder 13. There is.

The middle portion of the rear cover 40 is supported by the leveling pressure imparting means 46, and the front cover 41 is bolted to a bracket fixed to the support arm 4 so that the front cover 41 is rotated upward by a shock from the front. It is designed to move. The cultivating cover 37 is rotatable and fixed by an adjusting mechanism 47. The adjusting mechanism 47 includes a lever 49 rotatably supported by the top mast 8 via a support shaft 48, a locking pin 50 provided on the lever 49, and the locking pin 50 being detachably engaged. A locking plate 52 having a plurality of engaging recessed portions 51, an arm 53 fixed to the support shaft 48, and a bracket 54 pivotally connected to the arm 53 and provided on the rear upper surface of the main cover 38. And a connecting link 55 that is pivotally connected. Then, by selectively engaging the locking pin 50 with the engaging recess 51 of the locking plate 52, the rotation of the tilling cover 37 is restricted, and the push button 56 provided on the lever 49 is pressed to lock. The pin 50 is disengaged from the engaging recess 51, and by rotating the lever 49 in this state, the tilling cover 37 is rotated back and forth around the shaft center of the pawl shaft 33. It is designed to be able to respond to the needs or the working depth. A protective cover 69 is fitted over the upper end of the side frame 6 as shown in FIGS. 5 and 7.

[0018]

[Effect of the device]

 According to the present invention, the annular bushes 61, 62 are fitted onto the bearing bodies 12, 20, and the pair of side covers 39 are fitted on the bushes 61, 62 respectively so as to be rotatable about the axis of the pawl shaft 33. Since the bushes 61, 62 were fitted and mounted between the protective covers 29, 30 and the transmission case 5 or the side frame 6, the bushes fixed to the bearing bodies 12, 20 immovably in the left-right direction. The left and right side frames 6 can be supported rotatably around the shaft centers of the pawl shafts 33 by 61 and 62, respectively, and the lateral deviation of the tillage cover 37 can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a rear cross-sectional view of a lower side of a transmission case.

FIG. 2 is a rear cross-sectional view on the lower side of the side frame.

FIG. 3 is a rear view of the rotary cultivator.

FIG. 4 is a side view of a rotary cultivator.

FIG. 5 is a side view of a side frame.

FIG. 6 is a plan sectional view of a side frame.

FIG. 7 is a rear cross-sectional view of the upper portion of the side frame.

[Explanation of symbols]

 5 Transmission Case 6 Side Frame 7 Rotary Machine Frame 12 Bearing Body 20 Bearing Body 29 Protective Cover 30 Protective Cover 33 Claw Shaft 35 Tillage Claw 36 Tillage 37 Tiller Cover 38 Main Cover 39 Side Cover 61 Bush 62 Bush

Claims (1)

[Scope of utility model registration request] 1. A bearing body (12) (20) is interposed between lower parts of a transmission case (5) provided on one side of the rotary machine frame (7) and a side frame (6) provided on the other side of the rotary machine frame (7). The cleats shaft (33) is rotatably supported, and the cultivating claw (35) is provided on the claw shaft (33) to form the cultivating part (36), which covers the upper part of the cultivating part (36). The cover (38) is provided with side covers (39) for covering the sides of the tiller (36) on both left and right sides thereof, and the tiller cover (37) is provided so as to be rotatable forward and backward, and the claw shaft (33) and the bearing are provided. In a rotary cultivator having a protective cover (29) (30) for protecting a seal portion between the body (12) and (20), an annular bush (61) (62) is provided on the bearing body (12) (20). ) Is fitted onto the bushes (61) and (62), and the pair of side covers
Each (39) is externally fitted and attached so as to be rotatable around the axis of the claw shaft (33),
Mounting structure of a tilling cover in a rotary tiller, characterized in that the bushes (61) (62) are sandwiched between the protective covers (29) (30) and the transmission case (5) or the side frame (6). .