JPS5823709A - Lift and hitch apparatus of drive working machine in tractor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a three-point linkage method for attaching a drive source working machine, such as a rotary tiller, to a tractor body. %#K in 9 things that can be lowered freely and interlocked.

This invention relates to a device whose main purpose is to prevent the noise generation of a refracting joint even though the ground clearance (external lift height - tS> is made relatively large).

A rotary tiller and other drive source working machines are connected to the tractor body via a three-point link consisting of a top link and a lower link, and can be moved up and down.

It is known that the P'l'O shaft of the tractor body and the power receiving shaft of the working machine are interlocked and connected via a transmission shaft having free (bent) a-hands at both ends.

With this lifting coupling device, in order to reduce the turning radius on the headland and to stabilize the front-rear weight balance when driving on general roads, it is possible to move the work equipment very close to the dock 1 aircraft and to reduce the turning radius on the headland. Although it is desirable to increase the lifting height of the machine, there are limits to increasing the lifting height (electric lifting height and ground clearance) due to structural constraints of the bending joints at both ends of the transmission shaft. The current situation is that the superiority of the three-point link cannot be fully demonstrated due to problems such as uncontrolled movement, which causes noise and a decrease in durability.

Therefore, for example, as disclosed in the newsletter No. 29-7612, a bevel gear is provided on the transmission shaft, a bevel gear is provided on the rotary shaft, and the single bevel gear meshes with the large bevel gear. Although there is a technique for rotating at a constant angular velocity, the structure is complicated and cannot be designed compactly, and iK is practically impossible to apply especially to objects where there are many opportunities for foreign matter to enter, such as refractive joints.

The present invention has been devised in view of the above-mentioned points, in which a drive type collector is connected to the tractor body through a three-point link consisting of a top link and a lower link so as to be able to rise and fall freely, and the PTO on the tractor body side Just in case, the shaft and the power receiving shaft on the drive-type working machine side are interlocked and connected via a transmission shaft with bending joints at both ends.

It is characterized in that at least the refractive joint on the power receiving shaft side is an isometric universal joint.

Hereinafter, embodiments of the present invention will be described in detail with reference to Figure Nt-.

In Figures 1 and 2, (1) is the tractor body, the Mitsu FIT case is the vehicle body (2), and the vehicle body (2) is the tractor body.
) is equipped with a hydraulic system (4) having a pair of left and right lift doors (1) at the rear of the upper surface. No, hydraulic system (
4) is a structure in which a piston is fitted into a cylinder, and the lift arm (21) is raised by sending hydraulic pressure to the piston, and the lift door lift is lifted by releasing the hydraulic pressure. (3
) may be a single-acting type that lowers by its own weight, or a double-acting type that lowers the lift arm (3) using hydraulic pressure.

(5) is a drive-type collector, and in this example, the rotary tiller (
6) shows a rotary tiller with a top mast (
7), the power transmission case 0O1- is mounted on the machine frame (9) consisting of a pair of left and right boat links (8), etc., and the case 94 has a spline structure power receiving ) have a protruding shape.

(2) is a three-point link, with one top link in the center (2)
and a pair of left and right lower links 0, and the top link has a turnbuckle structure, a telescopic prinda structure, etc., and the spectacle part (2) at one end is fixed to the rear part of the vehicle body #C. ) via a removable pin υ, etc., and the other end 11! It is pivotally attached to the tip of the mirror part or top mast (7) via a removable pin shaft or the like. Incidentally, for installation, the base oeVc has a plurality of holes tW arranged at predetermined intervals in the height direction.

Each lower link has a ball joint at one end (the same goes for the eye 1 and the top link), which is mounted on the lower part of both sides of the car body, and is pivoted to the 9th pin (to), and the other end of the ball joint is attached to the 9th pin (to), and the other end of the ball joint is attached to the bottom of the body. The longitudinal center of each lower link trout and each lift arm (
3) are connected by a lift rod (2).

Here, a working machine (5) is connected to the tractor body (1) via a three-point link a3, and can be raised and lowered by a hydraulic system (4) Ic.

The trout is the FTO shaft on the tractor side, usually impoliny)
It has a spline shaft structure, and P'l'O@- and the power receiving shaft 0 are interlocked and connected by a transmission shaft (b) having a bending joint a8 (to) at both ends.

The transmission shaft ■ is a female spline cylindrical shaft (to) and a male spline shaft m
This is a so-called nested structure that slides in the axial direction by spline-fitting the transmission shaft, and bending joints wI@ are provided at both ends of this transmission shaft, and the axial length between the bending joints is 7-doI0. It is covered with a telescopic nesting structure O cylinder cover integrally 9, and the cylinder cover integrally is connected to the transmission shaft W through the wheel support IIIa4.
1@ It is freely supported by a mantle and is connected and supported to the tractor or the machine by a connecting cable such as a chain (not shown).

One of the refractive joints (to) is fitted with a spline to the PTO shaft and positioned with a retaining pin (to), and the joint element is protruded by the fc element at one end of the female fin cylindrical shaft (to). v) It is a cross join F connected by a T-cross pin ■, and the refraction angle of the refraction joint (the angle between the r'IIO axis and the transmission shaft) is 20@ or less, and in the example is 161
It is said to be around '.

The other refractive joint (to), i.e. the power receiving l1llQ! The refractive joint on the first side is a constant velocity universal glaze joint.

The constant-velocity (equal-angular) type free-shaft grip (2) is constructed as shown in FIGS. 2 and 3.

In Figures 2 and 3, the ring is the main body of the armour, and is cylindrical, with an annular inner circumferential groove formed on the center inner surface of the cylinder, and an elastic body such as an O-ring attached to the ring. is fitted, and a coupling element -@4 is attached to one end of the cylinder.

- is a motion element, which has a cylindrical part @ in the center and is integrally formed with a disc complement in a perfect circle on the outer shoulder of (direction) and are fitted so that they can freely rotate or rotate freely. Furthermore.

A two-pronged joint element protruding from a single male spline shaft is jointly connected to a joint element of the joint body through a cross pin 4,
On the other hand, the power receiving shaft αυ is fitted with a spline, and the bifurcated part of the joint element Il), which is fixed with a stopper, is jointly connected to the joint element of the joint body through a cross pin, and the floating element In the cylindrical portion of O@, spherical bodies each having a narrow elongated shape and protruding from the tips of the male spline shaft side coupling element and the m power receiving coupling elements are pivotally inserted into the cylindrical portion.

In FIG. 2, - is the power receiving shaft cover.

In the above embodiment, the working machine (5), which is connected to the tractor body (1) via the three-point link υ so as to be able to rise and fall freely, rotates from the PTO shaft to the transmission shaft during work at various working depths. In this example, the rotary tiller (6) is driven through a transmission body (for example, a gear) in a transmission case (rotation) to perform tilling work.

During the work, for example, in the solid line state in Fig. 2, each refraction part (to) hole is covered with a hood (all). It reduces entanglement with grass, straw, etc., and protects it from muddy water and muddy soil.

In addition, the bending part (to) is a constant velocity (equal angle) freely movable arm, and the cylindrical part [K spherical body 11141 of the motion element] slides into contact with it, and is covered by the motion element - the arm body. This prevents the aforementioned foreign matter from entering the interior, and since both spherical bodies r4- are equiangular with respect to the disk 17)K, the angular velocity is constant, resulting in less noise and clearer circles. Conquer the interlocking relationship.

Next, the hydraulic equipment (
4) Lifting (refer to the chain line in Figure 2) via t'' is carried out via the hydraulic system (4), lifting hydraulic pressure t''ff1ffLl foot arm (3), and three-point link a3. .

When the relative position of this work equipment (5) and the tractor body (1) changes, the transmission shaft (2) is a telescopic type consisting of a female spline cylinder shaft (toward) and a male spline shaft (toward), and a cover (toward).
Since both are telescopic, the displacement of the work equipment (i) decreases in proportion to the lifting height of the work equipment, so it increases.On the other hand, with the lifting of ) side refraction i
Part e (end) causes noise as the refraction angle changes, which limits the lifting height, but in this example, the spherical body -1 is the center of the moving element. Since the disc ←η of the floating element is fitted into the inner circumferential groove of the joint body, the groove between TJ
The floating element slides along K and θ1 and θ2t shown in FIG.
-It should be equiangular.

Thereby, even if the work implement (5) is lifted considerably high, noise generation due to the bending part (to) is suppressed.

From this point of view, it is also possible to provide the same continuous type universal joint as described above at the bending part.

In addition, the equi-connected universal joint shown in the figure is an example, and other
It may be an equal series universal joint such as a Pendix type or a Burfield type.

According to the present invention, the drive type collector (
5) is connected so that it can be raised and lowered via a three-point link consisting of the top link (2) and the lower link (total), and is connected to PTO@94 on the Schick 1 fuselage (1) side and the Machine (S
) side power receiving shaft ■ is interlocked via a power transmission shaft V) having a bending joint @ (to) at both ends, at least 10 times the bending joint (2) on the power receiving shaft side is equally connected Since it is characterized as a shapeable shaft joint,
Working machine (1) via three-point linkage (2) t! Since the joint on the work machine side of the transmission shaft is an equi-connected universal joint, the work machine (
5) The height of the lift must be determined carefully! ! , the headland O has the advantage of being able to turn around while reducing the amount of uncultivated land, and it is also easy to implement as it achieves the desired purpose with the simple method of adopting an equi-connected universal joint. It was.

[Brief explanation of the drawing]

Figure 1 is a surface view showing an example of the present invention, Figure 2 is an operating state.
1t-p is a fresh side view of the essential parts of the present invention, and FIG. 5 is an OWR front view of the isometric universal joint. (1)...Sick 1 machine, (1ri-・work machine, 0・
...Power receiving shaft, (2)...Three-point link, (13...
・Top link, α◆...lower link, (to) (to)...bent part, -...transmission shaft, -uniform velocity type universal joint.

Claims (1)

[Claims] 1 The drive source work equipment (5) is attached to the tractor body (1) with a three-point link consisting of the top link (2) and the lower link α fathom (
The tractor body (1) is connected so that it can be raised and lowered freely through
The PTO shaft on the side and the drive source working machine (the power receiving shaft I of the power receiving shaft I are interlocked and connected via the transmission shaft ■ having a bending joint 6111 (to) at both ends), and at least the power receiving shaft I 1. An elevating and lowering coupling device for a drive source working machine in a tractor, characterized in that the refractive joint (to) is a constant velocity universal joint.