초록 ▼

A tractor-mounted loader has a quick coupler mounted to forward ends of the boom arms thereof. The quick coupler includes a pair of attachment holders having their lower ends respectively pivotally connected to the pair of arms and selectively pivotable by a pair of attachment tilt cylinders. An att

A tractor-mounted loader has a quick coupler mounted to forward ends of the boom arms thereof. The quick coupler includes a pair of attachment holders having their lower ends respectively pivotally connected to the pair of arms and selectively pivotable by a pair of attachment tilt cylinders. An attachment in the form of a bucket includes a pair of connecting brackets including pins engageable by recesses in the upper ends of the holders and receptacles for receiving coupler elements carried by the holders. A pair of latch mechanisms are respectively carried by the pair of brackets and include spring-loaded latch pins which normally assume a latch position blocking passage of the coupler elements to or from the receptacles but which include ramp surfaces that cooperate with ramp surfaces of the coupler elements to cause the pins to be automatically moved from their latch positions to permit passage of the coupler elements into the receptacles during mounting of the attachment to the attachment holders. The latch pins may be manually moved to an unlatch position from which they are automatically released by being contacted by wedges carried by the holders when the latter are moved to a position disposing the coupler elements free of the receptacles during detachment of the attachment from the holders. An alternate embodiment shows the coupler elements formed by the mounting brackets and the receptacles formed by the holders with the latch mechanisms being mounted to the holders.

대표청구항 ▼

In a combination of a loader and an attachment wherein the loader includes a pair of vertically movable arms having forward ends respectively vertically pivotally connected to lower locations of a pair of upright attachment holders of an attachment carrier for being selectively pivoted by a pair of

In a combination of a loader and an attachment wherein the loader includes a pair of vertically movable arms having forward ends respectively vertically pivotally connected to lower locations of a pair of upright attachment holders of an attachment carrier for being selectively pivoted by a pair of attachment cylinders respectively connected between the arms and upper locations of the holders; and wherein said attachment includes a pair of mounting brackets having respective upper portions cooperating with upper portions of said pair of holders to define a horizontal pivot connection between the attachment and the carrier, with one of the pair of brackets and pair of holders defining receptacles opening toward and receiving respective coupler elements defined by the other of the pair of brackets and pair of holders, and a pair of latch mechanisms being respectively mounted to said one of said pair of brackets and pair of holders and each including an upright, reciprocably mounted latch in biased to a normal lowered latching position blocking movement of the coupler elements from the receptacles and being movable to a raised, detented release position permitting movement of the coupler elements from the receptacles, the improvement comprising: each of said pair of coupler elements having an upwardly directed first ramp surface; each of said pair of latch pins having a lower end defining a downwardly facing second ramp surface located for contacting a respective first ramp surface so as to raise an associated one of the latch pins over the coupler element when the attachment and carrier are being pivoted together, about said horizontal pivot connection, with the latch pins being in their normal latching positions; and a pair of trip surfaces are respectively carried by said other of the pair of brackets and pair of holders at respective locations above said pair of coupler elements; and a trip pin being carried by each latch pin in a location that is in a path of movement of a respective one of the pair of trip surfaces when the latch pins are each in its raised detented release position whereby the trip surfaces engage the trip pins to cause each of the latch pins to be moved from its released position, to which it has previously been manually placed for the purpose of detaching the attachment from the holders, to assume its latching position once the respective lower portions of the attachment and carrier have been pivoted apart by the attachment cylinders a distance sufficient to place the coupler elements beneath the latch pins, whereby the latch pins will ride over the coupler elements and assume their latching positions once the coupler elements move away from the receptacles.