DE202020105458U1 - Improved protection system for a power take-off on a work vehicle - Google Patents

Abstract

Work vehicle (1) with a body that defines a front section (3) and a rear section (4), the front and / or the rear section (3, 4) defining a power take-off, PTO, (6), the Work vehicle (1) comprises a protection system configured to selectively prevent contamination of the PTO (6) with debris, the protection system comprising a cap (16) configured to selectively cooperate with the PTO (6) to isolating the latter from the environment and comprising a bearing pin (17) carried by the body of the vehicle (1), the cap (16) being configured to cooperate in contact with the bearing pin (17) when it is not in use with the PTO (6) in order to be fastened with respect to the body of the vehicle (1).

Description

TECHNICAL AREA

The present invention relates to a protection system for a power take-off (PTO), in particular a protection system for a PTO of a work vehicle such. B. an agricultural vehicle.

BACKGROUND OF THE INVENTION

Agricultural vehicles, e.g. B. tractors, usually include a power take-off (PTO) configured to provide power to various accessories or implements carried by the tractor.

In particular, a PTO comprises a drive spline shaft which extends from the body of the tractor; in particular, tractors can comprise a front and / or a rear PTO.

When not in use, the PTO shaft is usually covered by a protective cap to prevent dirt from entering the gear elements and damaging them, and to prevent injuries from inadvertent contact by an operator or an observer with the rotating shaft .

Such a protective cap is removed by the user in order to connect the PTO shaft to a corresponding element of the auxiliary unit / elements in order to provide the required power. Consequently, the protective cap is usually stored in a tractor tool box or in the cab and is not always reinstalled on the PTO shaft as the operator forgets to rearrange the latter.

This forgetfulness leads to possible damage due to dirt particles that can enter the transmission via the PTO shaft.

Therefore, a need is felt for a system that enables the removal and reinstallation of the protective cap for a PTO shaft in a safer and faster manner.

An object of the present invention is to meet the aforementioned needs in a cost effective and optimized manner.

SUMMARY OF THE INVENTION

The above-mentioned object is achieved by a work vehicle 1 solved with a body that has a front section 3rd and a rear section 4th defined, such a front and / or such a rear section 3rd , 4th define a power take-off, PTO, 6, the work vehicle 1 a protection system configured to optionally prevent contamination of the PTO 6th with debris to avoid the one cap 16 that is configured for this, optionally with the PTO 6th cooperate to isolate this latter from the environment, and a bearing pin 17th going through the body of the vehicle 1 is worn, includes such a cap 16 configured to do so upon contact with the bearing pin 17th to cooperate if they are not at the PTO 6th is in use to pertaining to the bodywork of the vehicle 1 to be attached.

Preferably the PTO comprises 6th a drive shaft 7th that differ from the body of the vehicle 1 extends.

The work vehicle preferably comprises 1 a draw bolt 9 , which is configured to connect an implement and / or ancillary unit to the vehicle 1 to enable.

In particular, the bearing pin is 17th in the draw bolt 9 integrated.

More precisely, the draw bolt includes 9 a bolt 11 going through a pair of flanges 12th is worn with the bolt 11 an upper section 11a that extends over a respective flange 12th extends, comprises, wherein the bearing pin 17th in the upper section 11a is integrated.

The work vehicle preferably comprises a connecting means for connecting the cap 16 with the vehicle body.

In particular, the connecting means comprises a wire / road typology element.

The work vehicle preferably comprises a cover 8th who have favourited the PTO 6th laterally surrounds.

Figure list

• - 1 eine seitliche schematische Ansicht eines bekannten landwirtschaftlichen Fahrzeugs;
• - 2 eine perspektivische Ansicht, die einen vorderen Abschnitt des Fahrzeugs von 1 mit einem Schutzsystem gemäß der Erfindung in einem ersten Betriebszustand zeigt; und
• - 3 eine perspektivische Ansicht, die einen vorderen Abschnitt des Fahrzeugs von 1 mit einem Schutzsystem gemäß der Erfindung in einem zweiten Betriebszustand zeigt.

For a better understanding of the present invention, a preferred embodiment is described below by way of non-limiting example with reference to the accompanying drawings; show it:

• - 1 a side schematic view of a known agricultural vehicle;
• - 2 FIG. 13 is a perspective view showing a front portion of the vehicle of FIG 1 shows with a protection system according to the invention in a first operating state; and
• - 3rd FIG. 13 is a perspective view showing a front portion of the vehicle of FIG 1 with a protection system according to the invention in a second operating state.

DETAILED DESCRIPTION OF THE INVENTION

1 discloses an exemplary agricultural work vehicle 1 of known typology in particular, as shown, a tractor. As is known, the vehicle includes 1 a body, which is a cabin 2 defined for enabling the inclusion of an operator of the vehicle and further a front portion 3rd and a rear section 4th Are defined.

As usual, both the front and back sections are 3rd , 4th of the work vehicle 1 with resources 5 provided that are used to connect the vehicle 1 with auxiliary units or tools of different typologies are suitable.

In the described embodiment, the front section is 3rd with a PTO 6th provided, as in 2 and 3rd shown in detail.

As shown, the PTO includes 6th a wave 7th that differ from the body of the vehicle 1 extends, preferably from an optional cover 8th which is supported by the body of the vehicle and is configured to allow external elements to contact the shaft 7th to avoid when in use.

In particular, the cover 8th as conical and / or concentric with respect to the shaft 7th be realized; consequently, it is positioned around the latter and defines an inside diameter in contact with the body of the vehicle 1 and an outer diameter that is free in the vicinity that is larger than the inner diameter.

The front section 3rd the vehicle is advantageously with a tension bolt 9 provided, which is configured to enable the coupling of a corresponding implement or auxiliary unit (not shown). More specifically, the draw bolt includes 9 a bolt 11 going through a pair of flanges 12th extending from the body of the vehicle and spaced with respect to one another.

As a result, the vehicle body defines an upper flange 12th and a lower flange 12th both of which have a respective hole 13th define. The holes 13th passing through the top and bottom flange 12th are defined, are concentric and sized to the bolt 11 in a rotatably free manner, as is known.

According to the invention, the vehicle comprises 1 a protection system to optionally cover the shaft 7th of the PTO 6th . In particular, the protection system comprises a cap 16 with a hollow shape that is configured when the shaft 7th is not in use with the external shape of the shaft 7th to couple, and a bearing pin 17th that is configured to do this when the shaft 7th is in use, the cap 16 to be coupled with the latter in order to guarantee the fact that the latter is attached to the body of the vehicle 1 is attached.

The bearing pin 17th is carried by the body of the vehicle and is advantageously part of the tension bolt 9 . In particular, the bearing pin is 17th through an upper section 11a of the bolt 11 of the tension bolt 9 Are defined. Hence the upper section defines 11a an outer shape configured to match the hollow portion of the cap 16 to pair.

Advantageously, the protection system can further comprise a connecting means (not shown), e.g. B. wire / rod typology elements such. B. a rope or a chain that the cap 16 connects to the body of the vehicle in order to avoid losing the latter.

The functioning of the protection system according to the invention, as described above, is as follows.

In a resting state of the PTO drive shaft 7th ( 3rd ) is the cap 16 on the PTO shaft 7th arranged and avoids the contamination of the transmission with dirt particles from the environment. At the same time, if necessary, the user can use the draw bolt 9 Use to connect an implement or ancillary equipment.

In an operating state of the PTO shaft 7th ( 2 ) is the cap 16 at the section 11a of the bolt 11 arranged. In one such configuration is the PTO driveshaft 7th free and can be used freely; obviously such positioning does not allow the use of the tension bolt 9 . If the user forgets the cap 16 with the PTO drive shaft 7th To couple at the end of their operation, he suddenly becomes aware of this condition, since when he tries to pull the tie bolt 9 to use with which the cap 16 is coupled.

In view of the foregoing, the advantages of a protection system according to the invention can be seen.

The presence of a bearing pin 17th allows the user of the vehicle the cap 16 not placed in a tool box or in the cabin of the vehicle. As a result, there is less chance of forgetting the cap 16 again on the PTO drive shaft 7th to be arranged, thereby improving the safety of the transmission and globally of the vehicle.

The fact that the bearing pin 17th in the vehicle body near the PTO drive shaft 7th is realized is convenient for the user.

The integration of the bearing pin 17th in the bolt 11 of the tension bolt 9 comes with a small modification to the top section 11a this latter received. Furthermore, such features avoid the use of the tension bolt 9 if the cap is not on the PTO drive shaft 7th is arranged; therefore, this is another way of "forcing" the user to remove the cap 16 to use correctly.

Such a “compulsion” is still due to the optional connection of the cap 16 increased with the body of the vehicle via the lanyard.

It is clear that modifications can be made to the protection system described which do not extend beyond the scope of protection defined by the claims.

The bearing pin 17th can for example be located somewhere near the PTO drive shaft. Furthermore, the present invention can also be used for a rear PTO shaft.

Obviously, the shape of the tension bolt can 9 or the cap 16 according to the type of vehicle 1 vary.

Claims (8)

Work vehicle (1) with a body that defines a front section (3) and a rear section (4), the front and / or the rear section (3, 4) defining a power take-off, PTO, (6), the Work vehicle (1) comprises a protection system configured to selectively prevent contamination of the PTO (6) with debris, the protection system comprising a cap (16) configured to selectively cooperate with the PTO (6) to isolating the latter from the environment and comprising a bearing pin (17) carried by the body of the vehicle (1), the cap (16) being configured to cooperate in contact with the bearing pin (17) when it is not in use with the PTO (6) in order to be fixed with respect to the body of the vehicle (1). Work vehicle after Claim 1 wherein the PTO (6) comprises a drive shaft (7) extending from the body of the vehicle (1). Work vehicle after Claim 1 or 2 which further comprises a tie bolt (9) which is configured to enable the connection of an implement and / or ancillary unit to the vehicle (1). Work vehicle after Claim 3 , wherein the bearing pin (17) is integrated in the tension bolt (9). Work vehicle after Claim 3 or 4th wherein the tie bolt (9) comprises a bolt (11) carried by a pair of flanges (12), the bolt (11) defining an upper portion (IIa) extending over a respective flange (12), wherein the bearing pin (17) is integrated in the upper section (11a). A work vehicle according to any one of the preceding claims, further comprising connecting means for connecting the cap (16) to the vehicle body. Work vehicle after Claim 6 wherein the connecting means comprises a wire / road typology element. Work vehicle according to one of the preceding claims, further comprising a cover (8) which laterally surrounds the PTO (6).

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