DE202006017062U1 - Excavator arm for toy tractor or civil engineering vehicle has boom arm operating in two planes in conjunction with lift arm - Google Patents

Abstract

A toy tractor or civil engineering vehicle has an excavating boom (3) terminating at the distal end in a swivel-mounted scoop or shovel (6). The excavator arm (1) has a lever (16) moving with the lift arm (2) in two planes (A-A1; B-B1).

Description

The The invention relates to an excavator arm for a toy in the manner of a Shovel.

State of technology

A generic excavator is known by public prior use. The actuation of mentioned excavator arms by means of a lever mechanism of which an actuating lever is usually mounted rigidly on the lifting arm and another is mounted in a plane pivotally mounted on the lifting arm and a linkage the pivotally mounted boom with a fixed or pivotally mounted, partially positively guided blade ( DE 298 10 302 U1 ) emotional.

adversely because of that, the boom and the bucket are not independent of each other can be articulated targeted.

Digger arms according to DE 20 2004 007 095 U1 also have two operating lever but both are pivotally and individually boom and shovel move targeted. Hierduch above disadvantage is indeed eliminated, however, the lifting movement is actuated via a foot pedal. The disadvantage here is that the operator has the most required rotational movement only the other foot available.

task The invention is an excavator of the type mentioned be improved so that a purposeful independent operation of the Lift arm, the boom and the blade during filling and emptying by only two operating levers allows and thus both feet for rotary motion remain free.

This object is achieved in that the lifting arm is actuated by a still preferably permanently mounted lever, but the second operating lever is similar to a joy stick's in two planes or moved spatially, wherein the direction of movement A-A1 (see 1 ) the boom, and the direction of movement B-B1 (see 3 ) swings the blade targeted.

• 1. einerseits einen gegenläufigen Krafteinsatz der Arme einer Betätigungsperson beim Absenken des Hubarms und gleichzeitigem Einholen des Auslegers bewirkt und somit eine bessere Effizienz des Krafteinsatzes erreicht wird, wobei dieser Vorgang reversibel beim Anheben des Hubarms und Ausladen des Auslegers wirkt,
• 2. durch Auslegung und Anordnung o.g. Übersetzung die eingeleitete Kraft beim schwenken in Richtung horizontaler Lage des Auslegers das Hubmoment erhöht und somit der Ausleger leichter weit ausgeschwenkt werden kann,
• 3. vorzugsweise in der ausgeladenen, Richtung horizontaler Endstellung des Auslegers o.g Übersetzung eine Übertotpunktstellung einnimmt und somit der Ausleger in dieser Stellung ohne Krafteinsatz verweilt was das Entleeren der Schaufel erleichtert.

In a further embodiment of the invention, it is provided to use a lever transmission in the direction of movement A-A1, which:

• 1. On the one hand causes an opposite use of force of the arms of an operator when lowering the lift arm and simultaneously catching the boom and thus a better efficiency of the force application is achieved, this process acts reversibly when lifting the lift arm and unloading the boom,
• 2. by interpretation and arrangement og translation the force introduced when pivoting in the horizontal position of the boom increases the lifting torque and thus the boom can be easily swung far,
• 3. preferably in the unloaded, direction horizontal end position of the boom above translation occupies an over-center position and thus the boom dwells in this position without the use of force what facilitates the emptying of the blade.

Farther is to implement the solution according to the invention provided a lever translation in the direction of movement B-B1 so to use, the introduced force in the longitudinal direction of the lifting arm and redirecting this deflected force by a flexible pulling and pressure forces transmitted Component from the lift arm over use the boom to pivot the bucket so that over the entire swing range of the boom moves the blade targeted can be.

conveniently, is the lever mechanism for protection against damage and pollution mostly housed in the hub and boom.

Of the entire excavator arm is advantageous to support by a spring element so that the weight is preferably slightly overbalanced and thus a rest position is reached in the upper stroke position.

The Excavator bucket is preferably carried out with a separator to a allow quick change of different blades.

The Excavator bucket is preferably with an end stop in the emptying position perform, which, for example, looks like an actuating cylinder with deflection linkage, thus at excessive lowering speed when impacting the ground, keep load peaks away from the bucket operator.

embodiment

following The invention is based on a preferred embodiment in connection closer with the drawings explained. Showing:

1 : a side view of an excavator arm according to the invention in a horizontal end position with a bucket in the emptying position,

2 FIG. 2: a side view of an excavator arm according to the invention in a gathered end position with a blade in a closed position, FIG.

3 : 1 : a sectional view of a Excavator arm according to the invention.

The following is with reference to 1 to 3 an embodiment of an excavator described.

An excavator arm 1 , Game device side via a pivot bearing 5 mounted has a hollow profile-like lifting arm 2 with an equally hollow profile-like boom 3 pivotally mounted in storage 4 on. The excavator bucket unit 6 is about storage 7 swiveling on the boom 3 stored.

actuating lever 15 is firmly on the lift arm 2 attached.

actuating lever 16 is in the radial direction of the axis 17 in storage point 18 pivoted. axis 17 is radial in the bearing parts 20 and 21 rotatably mounted. linkage 22 is unilaterally by a joint bearing 23 on lever 16 , on the other side by a joint bearing 24 on the lever 25 each pivotally mounted. Umlenkhebel 25 is by storage 26 rotatable in the lift arm 2 stored. linkage 27 is one-sided by storage 28 on the lever 25 , other side by storage 29 on the boom 4 each pivotally mounted.

axis 17 points in the direction of the lever 25 a fixed lever 30 on, the form-fitting in the example executed as a slot bearing 31 of the reversing lever 32 intervenes. Umlenkhebel 32 is for example in a second bearing parts 33 rotatable about bearing point 26 stored.

A sheathed wire rope 34 with both sides pressed-on ends in the form of a shaft is by a respective joint bearing, mounted on the open end of the shaft, on one side on the lever 32 at storage point 36 , on the other side on the blade carrier 9 at storage point 37 (Known wire rope is conventionally known from cable circuits in the car sector). The outer shell 35 is fixed on one side on the lifting arm 2 , on the other side preferably firmly on the boom 3 attached. To the required minimum bending radius of the unit wire rope 34 and outer shell 35 to allow this unit after its attachment in the lift arm 2 led out of the Hubarmhohlprofils and is, for example, just before mounting on the boom 3 again guided within the boom hollow profile.

The end stop 8th is Hubarmseitig in the bearing point 13 swiveling on the boom 3 attached and blade side over that in the bearing point 12 swiveling on the boom 3 and on the blade carrier 9 attached deflection linkage 10 in the storage point 11 stored.

The shovel 14 is separable on the blade carrier 9 appropriate. The embodiment will not be discussed further here.

The spring element 19 is for example as Endlagegedämpfte gas spring on the one hand in the attachment point 38 through a pivot bearing on the lift arm 2 attached and game device side as well in the attachment point 39 stored.

The following is the operation of the excavator arm 1 described.

The lifting and lowering movement of the entire arm is by pressing the lever 15 in the direction of A-A1 or reversibly obtained. The demand-sized spring element supports the lifting movement and holds the entire arm 1 without operating force insert in the upper stroke position according to 1 ,

By operating the lever 16 from direction A to A1 will be over the storage 18 changed the direction of actuation and thereby on the linkage 22 the bellcrank 25 clockwise from direction 12 Clock (s. 2 ) rotated. In the direction 3 Clock is by changing the force-leverages the initiated operating force from the axial direction of the linkage 22 the forwarded force in the axial direction of the linkage 27 elevated. The linkage 27 pivots due to the above operations, the boom counterclockwise. Passes the bearing point 28 during rotation of the reversing lever 25 clockwise the imaginary connecting line of the bearing centers 26 and 29 According to end position according to 1 enters a backup position (over dead center storage). The boom 3 is thus without additional actuating force in the end position according to 1 held. When operating the lever 16 from direction A1 to A pivots boom 3 using the same components towards the end position according to 2 ,

By operating the lever 16 from direction B to B1 becomes axis 17 rotated clockwise. lever 30 shifted lever 32 in the illustration in 1 also in clockwise rotation. Wire rope 34 thereby displaces the blade 14 in counterclockwise rotation (emptying position). The end stop 8th has now reached its support position.

By operating the lever 16 from direction B1 to B pans shovel 14 using the same components in a clockwise direction. end stop 8th runs free in this direction of movement.

By the chosen embodiment of the wire rope 34 with outer shell 35 is the targeted operation of the shovel 14 over the entire swing range of the boom ( 3 ) guaranteed.

The Innovation has been described above in one embodiment. It is understood that changes as well as modifications are possible without thereby the inventive idea underlying the innovation will leave.

Claims (9)

Excavator arm for toy vehicles comprising - a lifting arm ( 2 ) with a spielfahrzeugseitigem end and a boom-side end - one with the boom arm end of the lifting arm ( 2 ) pivotally connected boom ( 3 ) with a shovel end and - one with the shovel end of the boom ( 3 ) pivotally connected excavator bucket unit ( 6 ) characterized in that the excavator arm ( 1 ) one with the lifting arm ( 2 ) in two levels (A-A1; B-B1) spatially pivotable operating lever ( 16 ) having. Excavator arm according to claim 1, characterized in that a lever transmission acting in the axial direction (A-A1) of the excavator arm ( 1 ) an opposing force application of the arms of an operator to the operating levers ( 15 ; 16 ) when lowering the lift arm ( 2 ) and simultaneously obtaining the boom ( 3 ) it acts. Excavator arm according to claim 2, characterized in that, by a lever transmission, the lifting torque for pivoting the boom ( 3 ) increases towards the horizontal end position. Excavator arm according to claim 2 or 3, characterized in that a lever transmission at the end of Ausschwenkvorgangs occupies an over-center position and the boom ( 3 ) dwells in this position without further use of force. Excavator arm according to claim 1, characterized in that a lever transmission starting acting in the radial direction (B-B1) of the excavator arm ( 1 ) by a deflection in the axial direction of a flexible train and compressive forces transmitting component ( 34 ; 35 ) and thus the blade unit ( 6 ) pans. Excavator arm according to claim 5, characterized in that, in the emptying position of the blade unit ( 6 ) An end stop supports the blade unit against further opening. Excavator arm according to one of the preceding claims, characterized in that, by execution of lifting arm ( 2 ) and cantilevers ( 3 ) As a hollow body, the actuating linkage are largely performed within. Excavator arm according to claim 1, characterized in that, on the game device and a lifting arm ( 2 ) mounted spring element the weight of the excavator arm ( 1 ) and the excavator arm ( 1 ) holds in the upper end position. Excavator arm according to one of the preceding claims, characterized in that the blade ( 14 ) is separable from the blade assembly.