FR2503764A1 - Hydraulically actuated mechanical shovel - incorporates handles in steering arm which are linked to vehicle control panel via cable and stop cylinder - Google Patents

Abstract

The hydraulically actuated vehicle with a small excavating shovel comprises a steering arm (1) which is jointed to the drivers seat of the vehicle above the front wheel (9). The arm contains a rod (2), the upper end of which is connected to operating handles (3) and the lower end of which is connected to a stop cylinder (4) on the seat. The cylinder (4) is linked to the control panel (7) of the vehicle by a cable and a bar (6) allowing the vehicle to be manoeuvred backwards and forwards by manual movement of the steering arm and the operating handles.

Description

 The present invention relates to a hydraulically actuated vehicle, in particular a small excavator or loader, comprising a driving lever and at least one stand consisting of a sole articulated to a support arm, the driving lever being formed by a rod. driving lever articulated to the driving seat of the vehicle with a control link to a hydraulic motor.

 I1 is known to provide in a vehicle a driving lever rod hinged to the driving seat in order to be able to manually steer and move the vehicle. In hydraulically actuated vehicles, such as in particular mobile machines such as small excavator shovels, use has never been made of driving lever rods since it did not appear possible to achieve good coordination between a manual displacement and hydraulic actuation with simple means.

 The present invention proposes to provide in vehicles, in particular small excavating shovels, a control link between the driving lever rod and the hydraulic actuation capable of allowing simple and efficient movement of the vehicle, in particular the small shovel excavator manually and / or hydraulically, forwards and backwards.

 This object is achieved according to the invention by the fact that a Bowden control is arranged at the actuating end of the driving lever rod by means of an actuating lever movable forwards and towards the rear in a plane around an axis, said Bowden control being connected by a linkage to the connection to a console of the hydraulic system for the movement forward and backward of the vehicle.

According to a preferred embodiment, the command
Bowden is attached to the crescent-shaped actuating lever at a point outside the axis of movement.

 It is further preferred that a stop rod is provided for the Bowden control on the side of the driving seat, said stop rod engaging in an interruption lever of the Bowden control.

 I1 is also provided that the vehicle according to the invention comprises at least one stand consisting of a sole articulated to a support arm, and intended to absorb the load in particular when the excavator or the loader mounted on a vehicle or a movable frame is in an inclined position. Usually provided on the vehicle, or the chassis, adjustable support arms which can be extended or folded mechanically or hydraulically and which are provided with a fixed or movable sole.

However, this often does not prevent the vehicle from moving, which can lead to damage during the operation of the excavator or the loader, especially when very precise work is involved, for example trenching .

 This drawback is avoided according to the invention, the stand provided for this purpose resistant to slipping.

 The stand according to the invention is characterized in that its sole has a removable support plate provided with spikes.

 According to a preferred embodiment, the support plate has from two to six studs. Advantageously, the support plate has at least two projections which engage in recesses in the sole and are lockable on the upper side of the sole. For locking, usual means such as screws or stirrups can be used. However, it has proved desirable in practice to use split pins for locking.

 It has also been found that it is advisable to produce the stand in material with elastic return, such as hard rubber, the support plate comprising the studs welded to it, preferably being made of steel.

In order to better understand the invention, we will now describe by way of nonlimiting example, an embodiment with reference to the accompanying drawing in which
FIG. 1 represents a driving lever articulated to the driving seat of a small excavator,
FIG. 2 represents a stand of an excavator shovel articulated to a support arm, and
Figure 3 shows the stand of Figure 2 seen from below.

 It can be seen in FIG. 1 that the driving lever rod 1 is articulated on the driving seat with the front wheel 9. A Bowden control extends from the grip of the driving lever rod 1 through the hollow rod it - even by means of a lever which interrupts the Bowden control and then to a linkage 6 which is connected to the control console 7 of the hydraulic system at a location which actuates the hydraulic pump for movement forward and towards the rear of the vehicle.

 The Bowden control is fixed to the actuating lever 3 curved in the shape of a crescent at a point external to the axis of rotation of the actuating lever and thus allows by manual engagement of the actuating lever to move forward and towards rear Bowden control.

 For stopping the Bowden control, a stop rod 4 is provided on the control seat by which it is possible to carry out exclusively forwards the movement forwards or the stop of the actuation which facilitates maneuvering the vehicle, in particular the excavator, in a simple manner.

 As seen in Figure 2, a sole 8 is articulated to a support arm 7a by means of a hinge 8a which can also be replaced by other mobile connections. The sole 8, preferably made of hard steel, is provided with a support plate 9 provided with studs. The fixing takes place in the embodiment shown by means of projections 10 which engage in recesses in the sole 8 and are locked by means of split pins (li). Naturally, interlocks by technically equivalent means are also possible without influencing operation.

Claims (8)

 1. Hydraulically actuated vehicle, in particular a small excavator or loader, comprising a driving lever and at least one stand consisting of a sole articulated to a support arm, the driving lever being formed by a lever rod articulated pipe to the driving seat of the vehicle with a control link to a hydraulic motor, characterized in that a Bowden control (2) is arranged at the actuating end of the driving lever rod (1) at the by means of an actuating lever (3) movable forwards and backwards in a plane around an axis, said Bowden control being connected by a linkage (6) to the connection to a control console (7 ) of the hydraulic system for moving the vehicle forwards and backwards.  2. Vehicle according to claim 1, characterized in that the Bowden control (2) is fixed to the actuation lever (3) curved in the shape of a crescent at a point outside the axis of movement.  3. Vehicle according to either of Claims 1 and 2, characterized in that a stop rod (4) is provided for the Bowden control (2) on the driving lever on the side of the driving seat, said stop rod engaging in an interruption lever of the Bowden control.  4. Vehicle according to any one of the preceding claims, characterized in that the sole (8) of the stand comprises a removable support plate (9a) provided with spikes.  5. Vehicle according to claim 4, characterized in that the support plate (9a) has two to six studs.  6. Vehicle according to any one of claims 4 and 5, characterized in that the support plate (9a) has at least two projections (10) which engage in recesses in the sole (8) and are lockable on the upper side of the sole (8l.  7. Vehicle according to claim 6, characterized in that each of the projections (10) is locked by means of a cotter pin (11).  8. Vehicle according to any one of claims 4 to 7, characterized in that the stand (8) is made of a material with elastic return, in particular hard rubber and the support plate (9a) is made of 'steel.