ES2277176T3 - HOLDING DEVICE FOR A HYDRAULIC ARM OF A WORKING VEHICLE. - Google Patents

Abstract

A clamping device for an hydraulic arm of a working vehicle to seize and manipulate an object, of the type connectable to the end of an articulated arm of a working vehicle by means of connecting means through a hydraulic oil supply and electrical current. characterized in that said clamping device includes: a) an arm (B); b) a forearm (AB) articulated to the first arm by means of lateral hinging (12), said forearm being inclinable up to 90° by means of an internal oleodynamic cylinder (49); c) a clamping jaw unit (GP) articulated outside the end of said forearm (AB) and involving three jaws (20a,20b,20c) with respective operating oleodynamic cylinders (14); d) said arm (B) involving a first rotational device (DR1) with first fluid motor (9) that transmits the external tangential continuous screw motion (7) geared on the crown gear (56) of said arm (B), in order to rotate said rotating internal box (46) with respect to the respective connecting means to the articulated arm of the working vehicle; e) said forearm (AB) comprising a second rotational means (DR2) to rotate said clamping jaw unit (GP) with respect to said forearm (AB) by means of a second internal fluid motor (42) and an axial reducer (15); f) a first and a second electrovalve (11,17) to operate the respective double two way oleodynamic movement members of said arm (B). the first fluid motor (9), the internal angulation hydraulic cylinder (49) and the three hydraulic cylinders (14) to operate the clamping jaws (20a,20b,20c), said hydraulic cylinders (14) being operated by a second fluid motor (42) in connection with a third electrovalve (43), and g) first and second brush electric switches for a rotating contact (SW1,SW2) for said second electrovalve (17) and the third electrovalve (43).

Description

Clamping device for a hydraulic arm of a work vehicle.

This invention relates to a device of clamping for a hydraulic arm of a work vehicle such as it appears in the characteristics of the part pre-characterization of the claim principal.

The work vehicle with said unit of Clamping is also part of the present invention.

Technical aspect

The technical aspect refers to handling of large blocks or heavy objects.

Art background

In the prior art the need for handle very heavy objects, such as large ones Stone blocks and other objects.

Currently, this is done through traditional lifting, handling and positioning, which however do not generally have a suitable and versatile means to perform the complete movement of the block.

An example of a clamping device of this type is described in the patent US-A-4,426,110 "Bivalve bucket hydraulic continuous rotation ", with a rotational drive means fluid operated pendant designed to rotate a means of hydraulic clamping of two jaws.

The use of mobile media is complex and It implies high manufacturing costs.

What's more, mobile media that can be coupled at the end of an arm, for example, of a self-propelled machine, they are generally not autonomous or not equipped with all Possible movements to manipulate an object.

Purpose of the present invention

The purpose of the present invention is to avoid the aforementioned inconveniences and allow the production of a universal hydraulic clamping unit, capable of being connected quickly to the end of an arm of a self-propelled machine, such as an excavator, for example, by simply disassembling its bucket and replacing it with said clamping unit by quick hydraulic connections intended for coupling automatic and connection to the electric current supplied by the excavator.

Description of the invention

The problem is solved by characteristics of claim 1.

The dependent claims refer to The preferred solutions.

Advantages

In this way the advantages of having a universal clamping device:

-

easily attachable and detachable from end of the work vehicle hydraulic arm self propelled;

-

be can guide with one hand, both in a 360 ° turn, being also flexible as a hand and rotatable when folded raised 90 °, having two rotation systems, one for the respective support and another for the respective clamping unit, regardless of its angular position.

The movement of the arm is possible thanks to the cylinder that previously allowed a previous rotation movement until 180 °

In this way, one therefore has the ability to hold, lift, turn, tilt and keep turning the gripping device, allowing any form of handling of the heavy block caught between the jaws of the grip device

Description of a preferred embodiment

The clamping device object of the present invention will be better understood in its structure with the help of attached figures representing a preferred embodiment, in the which:

- Figure 1 represents schematically and in axial section the clamping unit object of the present invention.

- Figure 2 represents the same section of the Figure 1, but with all the reference numbers that indicate constructive details.

- Figure 3 represents the schematic view of the support carried by the clamping unit, which allows mechanical connection and attachment to the arm of the self-propelled machine That is not represented.

- Figure 4 represents a stirrup connected to the device (2) to move, being supported by a stator (63) which does not allow the rotation of part (4) and part (61).

- Figure 5 represents the stirrup applied to the hydraulic stator (36) and with the elongated part supported by (40), having the possibility of moving and not allowing the rotation of the hydraulic stator

Detailed description of the clamping device by means of figures

As you can see in Figure 1, the clamping device essentially includes fixing means mechanics of its support structure (not illustrated) at the end of an articulated arm of a work machine (not illustrated), and coupling means of the respective hydraulic pipes for send hydraulic oil to the clamping unit and means of electrical coupling for the control of the respective solenoid valves that activate the hydraulic circuits of said clamping unit

Main structure of the clamping device

The clamping unit includes a structure of support that includes a connection with a first fluid motor (9) with bevel gears (8) for a screw gear helical (7) that engages in a crown (56) forming a rotation device (DR1) to rotate the arm assembly main (46) that includes the clamping unit (at least in 360º), the assembly being covered by a support flange (51) and an outer protective cover containing an inner box (47) within which a double hydraulic oil cylinder is housed effect (49), whose rod end is articulated (491) to a forearm (AB) that rotates with him.

Said forearm (AB) is articulated laterally (12) at the end of the arm (B) and therefore the cylinder (49), which is internally articulated to the arm (490), can rotate said forearm (AB) at least at an angle of 90 °.

The articulated end of the cylinder rod hydraulic (491) is articulated to the upper part of the support inside (40) of said forearm (AB), turning it from this Angular mode

Under the pivot plate and support (40) of the forearm (AB) there is a second fluid motor (42), which transmits the movement by means of an axial reducer (15) to the unit of clamp (GP) that includes three opposite jaws (20a-20b-20c).

In this way, the clamping unit can rotate at least 360 °, and also, with respect to the forearm (AB), also when said forearm (AB) is rotated with an inclination angular with respect to the arm (B), by means of said piston hydraulic (49).

In addition, the jaws (20a-20b-20c) of the unit restraint (GP) can operate independently of said forearm (AB) by activating three oleodynamic cylinders (14) respective.

The system of rotary electrical switches upper (1, 62, ...) allows to control the respective two-way solenoid valve by means of the electric switch rotary (43), whose electrical connections also reach the lower valve (17).

The rotary electric switch system final (24-30) similarly allows control of the respective second solenoid valve (43), which in turn controls the flow of oil to the different devices of the second engine of fluid (42), (said fluid motor acting on 22, 23, 24, 25, 26, 27, 28, 29, 34, 38). The solenoid valve (17) allows Hydraulic cylinder drive (14).

It is thus understood that the unit of subject of this invention is perfectly orientable in all addresses in order to manipulate as desired a heavy block

The constructive details are not represented, as they can be adopted by anyone With knowledge in this area.

The following describes in detail the numerical references of the most important elements of the structure of the clamping unit.

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Said arm (B) is conveniently covered by an outer box (47) and an inner box (46), inside the which can not rotate the outer box, while the Otherwise, the inner box (48) is rotatable and includes said Inner hydraulic cylinder for angular movement (49).

With the help of the cylinder (49) supported by (40) through the bearing (491), 90 ° rotation of the AB structure on the bearing (12). The reducer (15) is fixed to the internal structure (40), in which the second motor is mounted hydraulic (42) and hydraulic valve (43) that allows the rotation of 360 ° of the GP structure and the hydraulic cylinder support.

References

one

Rotating electric brushes

2

Cover

3

First electric cable

4

Hydraulic stator

5

Hydraulic oil line

6

Base hydraulic cylinder

7

Endless

8

Bevel gear

9

First fluid motor

10

Second power cable for activation of the hydraulic valve

eleven

Two-way solenoid valve for hydraulic motor (9) and hydraulic cylinder (49)

12

Pivot for rotation of the jaws

13

Support for two reducers

14

Hydraulic cylinder

fifteen

Second fixed gearbox

16

Rotary reducer

17

Third hydraulic valve

18

Hydraulic conduit that leads to electrohydraulic valves (17)

19

Hydraulic duct support

20 a

Jaw 1

20b

Gag 2

20c

Gag 3

twenty-one

Support that connects (23) with (22)

22

Clamping unit support rotary

2. 3

Tree rotary axis

24

Rotor hydraulic

25

M12 screw for fixing the hydraulic oil distributor

26

Seal-seal O-ring for lubrication

27

M14 screw for fixing the hydraulic oil distributor

28

Electric cable holder

29

Arched electrical contacts for brushes

30

License plate for electrical contacts

31

meeting sealing lubrication

32

Hydraulic accumulator (together with the blocking valve actuates the cylinder (14) and consequently actuates the clamping device (20a))

33

meeting sealing lubrication

3. 4

Bronze bearing

34th

Bronze bearing

35

meeting hydraulic oil seal

36

Distributor Stator

37

Fixing screw reducer

38

Support for hydraulic cylinder and jaw unit

39

meeting sealing lubrication

40

Non-rotating static cap

41

Tube hose

42

Second fluid motor

43

Bidirectional hydraulic valve for 42

44

meeting sealing lubrication

Four. Five

Bronze bearing

46

Box internal rotary

47

Box fixed exterior

48

Pipes flexible hydraulic for the distributor 24-26-21

49

Inner hydraulic cylinder

fifty

Hydraulic pusher support hydraulic

51

Flange outside to support the indoor arm unit

52

Bronze bearing

53

Steel bearing bracket bronze

54

meeting sealing against water and dust

55

M16 screw to fix the group rotary

56

Gear crown

57

Catch of lubrication

58

Engine hydraulic

59

Catch for (58)

60

Hydraulic oil line

61

Part rotary rotary electric switch

62

Part fixed rotary electric switch

63

Support for outer box (47) (on the support (51) and the bearing support (45) is screwed the support structure (63). The support structure (63) allows to fix the arm in a mobile way by means of the machine work in which a spoon was previously fixed: the cylinder that previously operated the spoon now allows to move the arm of the present device so that the pieces can move up to 180 °)

64

Bottom fork

65

Upper fork.

Claims (3)

1. Clamping device for one arm hydraulic of a work vehicle to manipulate an object, of type that can be connected to the end of an articulated arm of a work vehicle by means of connecting elements to through a hydraulic oil feed and stream electric, of the type that has hydraulic clamping jaws rotary, comprising:

to)

a arm (B);

b)

a forearm (AB), characterized in that said forearm (AB) is articulated to said arm (B) by means of a lateral joint (12), said forearm being able to be tilted up to 90 ° by means of an internal oleodynamic cylinder (49);

C)

a clamping unit (GP), articulated outside the end of said forearm (AB) comprising three jaws (20a, 20b, 20c), each jaw having, respectively, a cylinder oleodynamic work (14);

d)

said arm (B) comprising a first rotation device (DR1) with a first fluid motor (9) that transmits the movement (7) of the external tangential auger which meshes with the toothed crown (56) of said arm (B), with the order to rotate said inner rotary box (46) with respect to the corresponding means of connection to the articulated arm of the vehicle of work;

and)

said forearm (AB) comprising a second rotation means (DR2) to rotate said jaw unit of support (GP) with respect to said forearm (AB) by means of a second internal fluid motor (42) and an axial reducer (fifteen);

F)

a first and a second solenoid valve (11, 17) to operate the respective members of two-way oleodynamic movement of said arm (8):

i)

he first fluid motor (9),

ii)

he Internal hydraulic cylinder for angular movement (49) Y

iii)

the three hydraulic cylinders (14) to drive the jaws of clamping (20a, 20b, 20c), said cylinders being operated hydraulic by a second fluid motor (42) in connection with a third solenoid valve (43), and

g)

first and second switches electric brushes for a rotating contact (SW1, SW2) for the second solenoid valve (17) and the third solenoid valve (43).

2. Clamping device according to claim 1, characterized in that said arm (B) is covered by an outer box (47) and an inner box (46), in which the outer box is not rotating while its inner box ( 46) is rotary, and includes said internal hydraulic cylinder for angular movement (49). 3. Clamping device according to claim 1, characterized in that said forearm includes an outer case (38) articulating said clamping unit clamp (14, 20a, 20b, 20c) that rotates with the bearings (34, 34a) in an inner box (40) internally supporting at the end of the piston rod (491) of said inner hydraulic cylinder (49), which downwards supports the axial reducer (15) to provide the rotational movement to said jaw unit of clamp (GP) with external connection (22).