A lift arm for a loader can comprise a pivot end section extending along a first axis and including a first pin hole defining an origin at the intersection of x- and y-axes, a bucket end section extending along a second axis and including a second pin hole located a first distance away from the origin on the y-axis, and a hump section connecting the pivot and bucket end sections comprising a lifting cylinder coupler section including a third pin hole located a second distance away from the y-axis and a torque tube coupling section.

A quick joint of a front loader, the quick joint includes: a coupling member (30) having a hook shape and pivotally connected to a first pivot point (P1) of a boom post (20) through a first pivot shaft (31); a spring member (32) for applying an elastic force in a direction of releasing the coupling member (30) from a coupling target shaft (14) disposed on a boom post support (10) which is attached to a tractor (1); a lock unit (34) having a part making contact with the coupling member (30), and provided with a lock pin (36) for restraining behavior of the coupling member (30) at a coupling position (A1); and a guide slot (38) having an arc shape and formed in the boom post (20) to define a moving path of the lock pin (36) when the lock unit (34) rotates.

An attaching-detaching structure of a front loader that can make the attaching and detaching work to a vehicle body easier, a front loader, and a work vehicle. The attaching-detaching structure of a front loader is provided with a thumb which, on a sub-frame that supports a boom, is supported so as to be able to move between an engagement position for engaging with a main frame provided on a vehicle body and a release position at which engagement with the main frame is released, and which is biased in the release direction toward the release position from the engagement position; and a lock bar which, on the sub-frame, is supported so as to be able to move between a regulated position for regulating movement of the thumb in the release direction from the engagement position, and a regulation release position that allows the thumb to move to the release position.

An attaching-detaching structure of a front loader that can make the attaching and detaching work to a vehicle body easier, a front loader, and a work vehicle. The attaching-detaching structure of a front loader is provided with a thumb which, on a sub-frame that supports a boom, is supported so as to be able to move between an engagement position for engaging with a main frame provided on a vehicle body and a release position at which engagement with the main frame is released, and which is biased in the release direction toward the release position from the engagement position; and a lock bar which, on the sub-frame, is supported so as to be able to move between a regulated position for regulating movement of the thumb in the release direction from the engagement position, and a regulation release position that allows the thumb to move to the release position.

An attachment system for attaching an implement mounting assembly to a vehicle. The attachment system includes a vehicle attachment component that is fastenable to a front portion of the frame of the vehicle, and a frame attachment component that is removably attachable to the vehicle attachment component on one end via a securing axis, and pivotably attachable to the implement assembly on another end about a pivoting axis. When fastened to the vehicle, the vehicle attachment component is located upward from the underside of the frame. When the frame attachment component is attached to the vehicle attachment component, the securing axis is located upward from the underside portion of the frame, and the pivoting axis is located downward therefrom.

A loader for a tractor includes a loader arm, a parking support, and a lock brace. The parking support includes a support pivot end pivotally coupled to the loader arm, a ground engagement end opposite the support pivot end, and a plurality of connection regions disposed between the support pivot end and the ground engagement end. At least one connection region of the plurality of connection regions includes an obstruction. The lock brace includes a brace pivot end pivotally coupled to the loader arm and an attachment end opposite the brace pivot end. The attachment end is made to removably couple to any of the connection regions. The obstruction obstructs coupling of the attachment end of the lock brace to the respective connection region of the parking support.

A system to couple an implement to a work vehicle includes a first lock assembly coupled to an arm of the work vehicle. The first lock assembly includes a latch. The first lock assembly also includes a first hook and a second hook positioned on opposite lateral sides of the latch. The first lock assembly further includes a first actuator configured to drive rotation of the latch to trap a laterally-extending bar of the implement between a curved inner surface of the latch and respective curved bar-contacting surfaces of the first and second hooks to form a first connection that couples the implement to the work vehicle.

A system configured to couple an implement to a work vehicle includes a first lock assembly coupled to an arm of the work vehicle, and the first lock assembly includes a first lock, a second lock, and a first actuator configured to drive the first lock and the second lock laterally outwardly to engage respective first openings formed in the implement. The system also includes a second lock assembly coupled to a frame of the work vehicle, and the second lock assembly includes a third lock, a fourth lock, and a second actuator configured to drive the third lock and the fourth lock laterally outwardly to engage respective second openings formed in the implement.

A hybrid loader boom arm assembly for a loader work vehicle includes an arm assembly. The arm assembly includes a hollow first beam formed from a lightweight material and a block formed from a second lightweight material. The block has a first block end received within a first end of the first beam. The arm assembly includes at least one first steel reinforcing plate coupled to the first beam at the end, and at least one connecting plate coupled to the at least one first reinforcing plate.

A front loader includes a link operating mechanism spanning a bucket and a stand. The link operating mechanism is configured to cause, using a swing force of the bucket, a bending and stretching link to bend so that propping and supporting of the bending and stretching link are released.