JPS636Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a weight increasing device for a working machine that is attached to a tractor via a three-point suspension system.

[Conventional technology]

Among this type of working machines, that is, mounted tractor working machines, there are some, such as pressure rollers and harrows, whose working performance increases as their weight increases.

[Problems to be solved by the invention] Conventionally, in this type of work equipment, a weight is applied to the work equipment itself during work, but due to the weight balance with the tractor, it is not possible to apply too much weight, and the weight is increased. There were limitations, and as a result, there was a problem that the performance was lower than that of towed tractor work machines.

[Means to solve the problem]

Therefore, the present invention improves the lower link of a three-point suspension system and utilizes a drawbar, which is not used conventionally when using a three-point suspension system, to operate the lift arm of the lower link in the lifting direction during work. to apply downward pressing force to the lower link, applying downward pressing force to the working machine, and transferring the own weight of the tractor itself to the working machine side, so that the dead weight of the working machine can be increased arbitrarily, It is an object of the present invention to provide a working machine weight increasing device which can obtain the same working performance as when weights are applied without actually applying weights, and which solves the above-mentioned problems. In order to achieve this object, the present invention attaches a working machine to a tractor equipped with a three-point suspension and a drawbar via the three-point suspension, and the three-point suspension has a lower link and a drawbar. At both the left and right connection points with the lift arm, there are brackets that are fitted into the lower link and can be rotated slightly in the vertical direction.
A lift arm is connected to one side of the upper part of the bracket in the longitudinal direction, and both brackets are connected by a connecting rod that passes through the hitbox of the drawbar and is rotatable in the vertical direction, so that the lift ohm is actuated in the lifting direction. When this happens, the bracket rotates vertically around the connecting rod, presses the low link downward at the side of the bracket opposite to the side to which the lift arm is connected, and increases the pressing load of the work machine. It is characterized by the following structure.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a tractor designated by reference numeral 1 is a known four-wheeled riding type tractor, and a pressure roller 3 is attached to the rear part of the tractor via a three-point suspension system 2.
The three-point suspension system 2 consists of a top link 4, left and right lower links 5, 5, and lift arms 6, 6 that move up and down with a single-acting hydraulic cylinder (not shown). 7, all of which are known. The left and right lower links 5, 5 and the lift arms 6, 6 are not directly connected, unlike conventional ones, and as shown in FIGS. 2 and 3, the left and right lower links 5, 5 are A projection 9 protruding from the upper rear end of the gate-shaped bracket 8, which is crowned from above;
Lift arms 6, 6 are pivotally connected to 9. Also,
The brackets 8, 8 are connected at opposing sides by a connecting rod 10, have stopper pins 11, 11 inserted through their lower portions, and are fitted to the lower links 5, 5, so that they are movable in the front-rear direction, and the stopper pins 11 , 11 can be inserted and removed from the lower links 5, 5. The connecting rod 10 is vertically rotatable with the connecting pin 13 inserted into the hitbox 12 of the drawbar 7, and
The brackets 8, 8 also have a gap and a margin that allow them to rotate slightly in the vertical direction when fitted to the lower links 5, 5. Furthermore, bracket 8,
8, connect brackets 8, 8 to lower links 5, 5
At a position where the connecting rod 10 is removed from the drawbar 7 position by moving rearward, insertion holes 14, 14 are provided for penetrating and locking the lower links 5, 5 with a locking pin. the stopper pin 11;
11 can be used for both purposes. The insertion holes 14, 14 are not used when the connecting rod 10 is in the hitbox 12 of the drawbar 7. In the work equipment mounting device having such a configuration, the pressure roller 3 is attached to the tractor 1 via the three-point suspension device 2.
When installing the drawbar and introducing it into the field to perform suppression work, place the connecting rod 10 in the hitbox 12 of the drawbar 7 as shown in FIGS. 2, 4, and 5, and insert the connecting pin 13. The tractor 1 is driven to pull the pressure roller 3. When it is desired to increase the weight of the pressing roller 3, the lift arms 6, 6 are raised in the lifting direction, and as shown in FIG. The connecting rod 10 contacts the inner surface of the hitbox 12 at point a and its upward movement is restricted, and the bracket 8 rotates slightly at a point on the opposite side to the side to which the lift arm 6 is connected. b comes into contact with the lower links 5, 5, and a rotational force in the direction of the arrow is applied to press the lower links 5, 5 downward, and a downward pressing load is applied to the pressure roller 3 attached to the rear end of the links 5, 5. multiply. Therefore, the same pressing operation as when the weight of the pressing roller 3 is increased is performed, and the work performance is improved. This pressing load on the pressure roller 3 has the effect of increasing the weight of the tractor 1 toward the pressure roller 3 by increasing the lifting force (lifting force) of the lift arms 6, 6, and increasing the weight of the pressure roller 3. do. On the other hand, when the tractor 1 and the pressure roller 3 move outside the field, if the lifting force of the lift arms 6, 6 is released (the lifting arms are raised and lowered by a single-acting hydraulic cylinder), the towed tractor working machine You can move it in the same way. In addition, when lifting the pressure roller 3 using the three-point suspension device 2, as shown in FIGS. 6 and 7, the connecting pin 13 of the drawbar 7 is removed, the connecting rod 10 is moved outside the hitbox 12, and the The bracket 8 moved along the lower links 5, 5,
8 into the insertion holes 14, 14, and the stopper pins 11, 1
1, and by fixing the lower links 5, 5 and the brackets 8, 8, it is possible to lift the pressure roller 3 and travel in the same way as with a normal three-point suspension system 2. Furthermore, when there is no need to use the brackets 8, 8 and the connecting rod 10 of the present invention, they can be easily removed from the lower links 5, 5 by removing the stopper pins 11, 11, and the lift arms 6, 6 and the protrusions 9, 9,
By directly connecting the lift arms 6, 6 to the lower links 5, 5, the lower links can be made similar to the conventional lower links. Further, the same operation and effect can be obtained even if the lift arm 6 and the bracket 8 are connected to each other at the upper front end of the bracket 8.

[Effect of the idea]

As described above, according to the work machine weight increasing device of the present invention, the work machine attached via the three-point suspension system is lifted up by the lift arm of the lower link, and the work machine is moved downward using the drawbar. Because the pressure load is applied, even if the work equipment is constructed to be lightweight, the same work performance as a heavy work equipment can be obtained.Moreover, the pressure load can be adjusted arbitrarily, and the balance with the tractor is good. Although it is a work machine that can be raised and lowered, it can perform high-performance work similar to that of a tow-type work machine. The connecting rod 10 of the above embodiment may have a circular cross-sectional shape, and the working machine may have a pressure roller 3.
Needless to say, the present invention is not limited to the present invention, and can be applied to working machines such as harrows, for example, where it is desirable to have a large weight during work.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic side view showing one embodiment of the present invention, Fig. 2 is a perspective view of the main parts, Fig. 3 is a sectional view taken along the line - - of Fig. 2, and Fig. 4 is a mode of use of the present invention. 5 is a side view of the same, FIG. 6 is a plan view of the main part showing another mode of use, FIG. 7 is a side view of the same, and FIG. 8 is an explanatory view of the operation. 1... Tractor, 2... Three-point suspension system, 3...
Suppressing roller, 4...Top link, 5...Lower link, 6...Lift arm, 7...Draw bar,
8... Bracket, 9... Protrusion, 10... Connecting rod, 11... Stopper pin, 12... Hitbox, 13... Connecting pin, 14... Insertion hole.

Claims (1)

[Claims for Utility Model Registration] A working machine is attached to a tractor equipped with a three-point suspension device and a drawbar via the three-point suspension device, and the three-point suspension device has a lower link and a lift arm. A bracket that is fitted to the lower link and can be rotated slightly in the vertical direction is provided at both the left and right connecting portions, and a lift arm is connected to one side of the upper part of the bracket in the front-rear direction, and both brackets are connected to the hitbox of the drawbar. When the lift arm is operated in the lifting direction,
The bracket is configured to rotate vertically around the connecting rod to press the lower link downward at a portion of the bracket opposite to the side to which the lift arm is connected, thereby increasing the pressing load of the working machine. A work machine weight increase device featuring: