JPS6211363Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a rotary frame structure for an agricultural tractor.

(b) Conventional technology and its problems In the rotary part of conventional agricultural tractors,
The deep plowing adjustment device was connected to the deep plowing adjustment beam, but it was weak in strength considering the frame structure of the rotary section, and the rotary section main drive horizontal axis casing and the deep plowing adjustment beam, which were part of the frame structure, Since the brackets and the like were not assembled as a unified structure, the frame structure of the rotary part was also weak.

The object of this invention is to provide a rotary frame structure for an agricultural tractor that can unify the frame structure of the rotary part and concentrate it in one place as much as possible, and also improve the strength.

(c) Means for solving the problem The present invention is to install a rotary main drive horizontal shaft concentrically on the left and right side walls of the case support, which has a built-in gearbox that connects the end of the PTO shaft and the rotary main drive shaft. Secure the inner edges of the left and right casings to be fitted,
On the same left and right casings, at a location a sufficient distance from the center of the case support to the left and right.
The left and right brackets extending in the same direction as the PTO axis are fixed, and the lift arms are connected to the front ends of the left and right brackets via connecting rods, and the base end of the deep plowing adjustment frame is connected to the rear ends, and the distance between the connecting rods is fixed. , the spacing between the lift arms and the spacing between the deep plowing adjustment frames are made approximately equal to the spacing between the left and right brackets, a gearbox bracket is provided protruding from the rear upper surface of the gearbox, and the adjustment support rod of the deep plowing adjustment device is attached to the same bracket. The upper ends of the left and right auxiliary support rods have their lower ends pivoted, the upper ends of the adjustment support rods and the deep plowing adjustment frame are connected by screw rod receivers, and their lower ends are pivoted to the front parts of the left and right brackets. A rotary frame structure for an agricultural tractor, characterized in that each adjusting support rod is pivotally mounted in the middle, and a sufficient distance is provided between the connecting portion of the agricultural tractor and the axis of the main drive horizontal shaft of the rotary section. This is related.

(D) Example The example of this invention will be explained in detail based on the drawings (Figures 1 to 3). The rotary parts are shown pivotally connected at intervals.

In the figure, 2 is a PTO shaft for transmitting power from the agricultural tractor A to the rotary part B, 3 is a gear part, which transmits the power from the PTO shaft 2 to the rotary part main drive horizontal shaft 4, and one end of the same shaft. Power is transmitted from the rotor to the tilling claw shaft 5 via the interlocking mechanism, and the tilling claws 6 are rotated.

The rotary section main drive horizontal shaft 4 is built concentrically into the left and right casings 7, 7', and the left and right casings 7, 7' are connected to the left and right side walls of the case support 30 in which the gearbox 8 forming the gear section 3 is built. are integrally and firmly connected.

Left and right side brackets 9, 9' are fixed on the casings 7, 7' at a sufficient distance symmetrically from the center of the gearbox 8. The front ends of the frames 10, 10' are rotatably supported by pivots, and a tail wheel support horizontal rod 11 is connected to the rear ends of the frames 10, 10'.

The distance between the deep plowing adjustment frames 10, 10' is approximately equal to the distance between the left and right brackets 9, 9'.

12 is a deep plowing adjustment device, and a gearbox bracket 13 is connected to the rear upper surface of the gearbox 8.
An adjustment support rod 15 whose lower end is pivotally attached 14 to the support rod 15, a screw rod 16 attached to the support rod 15, and a handle 17.
It consists of a screw rod receiver 18 whose lower end is pivotally connected to the deep plowing adjustment frame 10, 10'.

19, 19' have upper ends connected to both sides of the adjustment support rod 15 of the deep plowing adjustment device 12, and lower ends connected to the left and right side brackets 9, 9' to support and fix the adjustment support rod 15. There are auxiliary support rods on the left and right sides,
The left and right auxiliary support rods 19, 19' have their lower ends connected to left and right brackets 9, 9' which are fixed at fixed distances to the left and right from the center, so that they can be rotated from the upper end to the lower end. It has a configuration that widens toward the end and is configured to perform a strong support function. Moreover, since it is a pivot connection, the pivot portion can perform a shock absorbing function.

20 and 20' are lift arms for lifting and lowering the rotary part B protruding from the rear of the agricultural tractor A;
Operated by hydraulics. This lift arm 20,
The distance between the brackets 20' is also approximately equal to the distance between the left and right brackets 9, 9'.

21 and 21' are connecting rods that are pivotally connected to the tips of the lift arms 20 and 20';
The ends of the connecting rods 21, 21' are connected to left and right brackets 9, 9' by pivots 22, 22', and when traveling other than during tilling work, they can be moved left and right by lift arms 20, 20'. side bracket 9,
The rotary part B is lifted up via the rotary part 9', and in plowing work, etc., the rotary part B is lowered and the plowing adjustment device 12 performs deep plowing adjustment, so that the plowing work etc. can be performed accurately. There is.
The spacing between the connecting rods 21, 21' is also approximately equal to the spacing between the left and right brackets 9, 9'.

Reference numerals 23 and 23' designate reinforcing bodies installed and fixed between the left and right brackets 9 and 9' of the casing 7 of the rotary section main drive horizontal shaft 4 and the connecting section 1.

24 is an air breath cylinder connected to the upper part of the gear box 8. 25 is a rotary side cover,
26 is a rotary cover, and 27 is a rear cover.

(e) Effects With the above configuration, the present invention has the following effects.

The deep-plow adjustment frame, which is directly connected to the tail wheel, is not only linearly connected to the left and right casings, but also connected to the lift arm via a screw rod receiver, adjustment support rod, left and right auxiliary support rods, and a connecting rod. There is.

Therefore, even if a thrusting force is applied to the tail wheel and the deep plowing adjustment frame directly connected to the tail wheel when lowering the rotor, a part of it is lifted up via the screw rod receiver, adjustment support rod, left and right auxiliary support rods, and connection rod. Since it is also transmitted to the arm, the amount of thrust force applied to the casing can be reduced as much as possible, which in turn can reduce as much as possible the transmission of impact force to the rotary main drive horizontal shaft located inside the casing. ,
Damage to the coax can be prevented.

Furthermore, in the rotary section, the deep plowing adjustment frame, the left and right auxiliary support rods, the connecting rods from the lift arms, etc. are concentrated and connected to the left and right brackets, and the members that make up the main frame of the rotary section are connected in one place. Furthermore, since the parts where each member is assembled are arranged in the casing of the main drive horizontal shaft of the rotary section, the strength of the casing, which is the main component of the rotary section, can be used to ensure reliable operation. Furthermore, the deep plowing adjustment device is supported by the right and left auxiliary support rods in a manner that spreads outward from the left and right, resulting in a structure that is good in terms of strength.

By providing a sufficient distance between the connecting part at the rear of the agricultural tractor and the axis of the main drive horizontal shaft of the rotary section, when the rotary is lowered, thrusting force is applied to the tail wheel and the deep plowing adjustment frame directly connected to the tail wheel. As a result, even if a rotational moment about the coupling part is generated in the casing surrounding the rotary main drive horizontal axis, the acting force applied to the casing can be reduced, and from this point of view, the rotary main drive horizontal axis The transmission of impact force to the shaft can be reduced as much as possible, and damage to the coaxial shaft can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of a rotary frame structure of an agricultural tractor according to the present invention, FIG. 2 is a plan view of the main part, and FIG. 3 is a sectional side view taken along the line shown in FIG. 2. In the figure, A: agricultural tractor, B: rotary part,
1: Connection section, 2: PTO shaft, 3: Gear section, 4: Rotary main drive horizontal shaft, 5: Tilling claw shaft, 6: Tilling claw, 7, 7': Casing, 8: Gear box,
9, 9': Left and right side brackets, 10, 10': Deep plowing adjustment frame, 11: Tail wheel support horizontal rod, 12: Deep plowing adjustment device, 13: Gear box bracket, 1
4: Pivot joint, 15: Adjustment support rod, 16: Screw rod, 1
7: Handle, 18: Spiral rod receiver, 19, 19':
Left and right side auxiliary support rods, 20, 20': Lift arm, 21, 21': Connection rod, 22, 22': Pivot joint, 23, 23': Reinforcement body, 30: Case support.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotary part main drive horizontal shaft in which a rotary part B is pivotally supported on a connecting part 1 of an agricultural tractor A via the connecting part 1, and is interlocked and connected to a PTO shaft 2 protruding from the rear of the agricultural tractor A. This agricultural tractor is configured to drive the rotary part B by transmitting power from the tilling claw shaft 5 to the tilling claw shaft 5, and to adjust the deep plowing by the tilling claws 6 by means of a deep plowing adjustment device 12 connected to the constituent members of the rotary part B. In the rotary frame structure, the left and right casings have the rotary section main drive horizontal shaft 4 concentrically and loosely fitted on the left and right side walls of the case support 30 which incorporates the gear box 8 that connects the end of the PTO shaft 2 and the rotary section main drive shaft 4. 7, 7', on the left and right casings 7, 7', at a sufficient distance left and right from the center of the case support 30, on the left and right sides extending in the same direction as the PTO shaft 2. The brackets 9, 9' are fixed, and the connecting rods 21, 2 are attached to the front ends of the left and right brackets 9, 9'.
1' to connect the lift arms 20, 20', and a deep plowing adjustment frame 10, 1 at the rear end.
Connect the base ends of 0' and adjust the distance between the connecting rods 21 and 21', the distance between the lift arms 20 and 20', and the distance between the deep cultivation adjustment frames 10 and 10' to the distance between the left and right brackets 9 and 9'. A gearbox bracket 13 is provided projecting from the upper rear surface of the gearbox 8, and the lower end of the adjustment support rod 15 of the deep plowing adjustment device 12 is pivotally supported on the bracket 13, and the lower end of the adjustment support rod 15 is the same as the upper end of the adjustment support rod 15. Deep plowing adjustment frame 10,1
0' by a threaded rod receiver 18, and whose lower ends are pivoted to the front parts of the left and right brackets 9, 9'. Adjust the upper ends of the support rods 15. A rotary frame structure for an agricultural tractor, characterized in that a sufficient distance is provided between the connecting portion 1 of the agricultural tractor A and the axis of the rotary main drive horizontal shaft 4.