ES2264305A1 - Mechanical suspension for agricultural machinery has regulator for controlling rigidity of mechanical shock absorber such that suspension can adapt to varying work conditions and agricultural machineries - Google Patents

Abstract

A floating frame has two close semi-portions articulated in between by a fixed joint and mounted to the frame of an agricultural machinery in which counterweights are mounted to provide stability. A mechanical shock absorber is articulated to the semi-portions by fixed joints such that the counterweights resist irregularities in the area and prevent transmission of the irregularities to a tractor. A regulator controls the rigidity of the mechanical shock absorber such that the suspension can adapt to the different work conditions and to different agricultural machineries.

Description

Mechanical suspension, for machinery agricultural.

The object of the invention is a suspension mechanical, for agricultural machinery and, more specifically, a mechanical suspension for tractors, which uses counterweights of inertia.

Conventionally, agricultural machinery is It has racks and is captive of a tractor on which it depends so that it can work (it always needs an element motor) WO92 / 09190, for example, refers to Agricultural machinery of this type.

When agricultural machinery is transported, its balancing is detrimental to the tractor. Consequently, it must be reduced and, if possible, eliminated
tell him

One way to eliminate it is to have counterweights with suspension.

Various ways of arranging the Counterweights (including varying the weight of such counterweights to adapt them to different terrains or work ducts).

Suspensions are also known, but the suspensions known to the applicant result excessively complex (and therefore difficult and complicated maintenance, repair or replacement in case of breakdown or deterioration) as they base its functioning in fluidic performance which, in addition, requires a previous connection to the hydraulic system itself tractor.

The applicant has developed a suspension of fully mechanical operation and always fully functioning regardless of the tractor itself. It is characterized because it consists from:

a) a floating frame, structured in two semi-parts, articulated together by fixed articulation and that, respectively, are mounted on the frame of agricultural machinery and assemble themselves to counterweight that provides stability to said machinery agricultural;

b) at least one mechanical damping device articulated jointly to the semi-parts of the floating frame by means of respective fixed joints; from so that, with the agricultural machinery in motion, the counterweights counteract the irregularities of the land, without transmitting them to the tractor;

c) means to regulate the stiffness of said mechanical damping device; so that the same suspension can adapt to different working conditions or machinery Agricultural of different powers.

To better understand the purpose of this invention, a preferred form of practical realization, susceptible to accessory changes that do not distort its foundation.

Figure 1 represents an overview Schematic elevation of a mechanical suspension for machinery agricultural according to the invention, in which the floating frame (1) goes mounted on the frame (B) of the agricultural machinery and has himself the counterweights (C).

It is an accessory for the purposes of the invention, by example (and among other peculiarities):

- the width (and in general the dimensions) of the floating frame (1),

- the use of one or more devices mechanical dampers (2), arranged in parallel,

- the number (amount) of counterweights (C) employees,

- the specific means (3) used to regulate the stiffness of the device (s) (2), and that these are independent or constitute one of the caps shock absorber spring ends (22).

An example of practical, non-limiting embodiment of the present invention.

The present invention concerns a suspension mechanical, for agricultural machinery consisting basically of:

a) a floating frame (1),

b) at least one damping device mechanical (2), and

c) means (3) for regulating the stiffness of said mechanical damping device (2).

The floating frame (1) is mounted on the frame (B) of agricultural machinery and admits itself to one or several counterweights (C), which can be arranged and removed with ease, at will and according to specific needs of the user at all times.

In accordance with the invention, and according to the represented embodiment, the floating frame (1) is structured in two semi-parts (1a), (1b) articulated together each other through a fixed joint (11). One of the semi-parts (1a) is the one that is mounted on the frame (B) of agricultural machinery and the other semi-part (1b) is the one that supports the counterweights (C) -see figure 1-.

These two semi-parts (1a), (1b) of the frame (1) are also related to each other by at least a mechanical damping device (2) - in addition to the fixed joint (11) mentioned above. This relationship is also by fixed joints (2a), (2b).

The mechanical damping device (2) -or each mechanical damping device (2), if there is more than one- consists of:

- a shaft-stem (21),

- a spring damper (22), and

- extreme stops (23a), (23b).

The shaft-stem (21) goes articulated by its ends, in (21a), (21b) respectively, at semi-parts (1a), (1b) of the floating frame (one).

The shock absorber spring (22) is mounted coaxially on the shaft-stem (21). The means of end stops (23a), (23b) determine the maximum expansion of the shock absorber spring (22) and, therefore, the stiffness of the suspension.

In accordance with the invention, said rigidity of the suspension is adjustable, using means (3); the which allows the same mechanical damping device (2) can adapt to different working conditions or machinery Agricultural of different powers.

For the embodiment represented, those cited means (3) constitute them:

- a thread (32) in the corresponding area shaft-end shaft (21),

- a nut / locknut set (31) arranged in said thread (32).

The relative position of the nut / counter kit
nut (32) with respect to the nearest joint (2b) -distance (d) - determines the stiffness of the mechanical damping device (2): larger distance (d), greater rigidity.

In this exemplary embodiment represented the own means (3) constitute one of the extreme stops (23b) if either end stop (23b) and means (3) can be independent each other - using, for example as a stop (23b) a shock absorber elastic similar to (23a) on the other side, sandwiched between the regulating means (3) and spring-damper (22) -.

Claims (3)

1. Mechanical suspension, for agricultural machinery, characterized in that it consists of: a) a floating frame (1), structured in two semi-parts (1a), (1b) articulated jointly between yes through fixed articulation (11) and that, respectively, mounted on the frame (B) of the agricultural machinery and mounted on each other same to the counterweight (C) that provides stability to said Farm Equipment; b) at least one mechanical damping device (2), jointly attached to the semi-parts (1a), (1b) of the floating frame (1) by means of respective joints fixed (2a), (2b); so that, with agricultural machinery in movement, the counterweights offset the irregularities of the terrain, without transmitting them to the tractor; c) means (3) for regulating the stiffness of said mechanical damping device (2); so that the same suspension can adapt to different working conditions or to Agricultural machinery of different powers. 2. Mechanical suspension, for agricultural machinery, according to the preceding claim, characterized in that said mechanical damping device (2) consists of: a) a shaft-stem (21) articulated (21a), (21b) to the semi-parts (1a), (1b) of the floating frame (1); b) a shock absorber spring (22) mounted coaxially on said shaft-rod (21); c) extreme stop means (23a), (23b) that determine the rigidity of the suspension, by limiting the expansion of said damping spring (22). 3. Mechanical suspension, for agricultural machinery, according to previous claims, characterized in that the means (3) for regulating the rigidity of the suspension constitute one of the stops (23b) that limit in one direction the expansion of the damping spring (22) .