Front pin lock for a tool attachment device
First Claim
1. A quick coupler for attaching a tool, comprising an attachment bracket with two parallel attachment pins, to an earth moving vehicle, wherein the quick coupler comprisesa frame with a first cut-out and a second cut-out arranged substantially perpendicular to each other, where each respective cut-out is adapted to cooperate with a respective attachment pin of the tool,at least one locking arrangement, moveable in relation to the frame and adapted to delimit the second cut-out in a direction parallel to the first cut out, whereby one of the attachment pins of the tool is locked up in the cutout,one single actuator arranged in the frame adapted to move the at least one locking arrangement between a first open position, corresponding to a retracted position of the actuator, and a second locked position, corresponding to an extended position of the actuator,at least one locking piston arranged to be moved between an inner position and an outer position, andat least one locking segment arranged to be rotated in relation to the frame in a first direction and a second direction between different positions, whereby the locking segment in at least one position delimits the first cut-out,characterized in that the one single actuator is arranged between the at least one locking arrangement and the at least one locking piston and is arranged to move both the at least one locking arrangement and the at least one locking piston in relation to the frame,that the at least one locking segment is arranged in relation to the at least one locking piston so that the at least one locking segment is prevented from rotating in the first direction, to prevent removal of the respective attachment pin from the first cut-out, when the locking arrangement is in the second locked position and is allowed to rotate in the first direction, to allow removal of the respective attachment pin from the first cut-out, when the at least one locking arrangement is in the first open position,that the at least one locking segment is arranged in relation to the locking piston so that the at least one locking segment is allowed to rotate in the second direction, to allow insertion of the respective attachment pin into the first cut-out, when the at least one locking arrangement is in either the locked position or the open position,where the at least one locking segment is arranged to rotate in relation to the at least one locking piston,wherein the at least one locking piston has an outer end and an inner end whereby the at least one locking segment is arranged in relation to the at least one locking piston so that at least some point on the outer end of the at least one locking piston is located at a first distance from the centre of rotation of the at least one locking segment at the outer position of the at least one locking piston, when the at least one locking arrangement is in the locked position, and where at least some point on the outer end of the at least one locking piston is located at a second distance from the centre of rotation of the at least one locking segment at the inner position of the at least one locking piston, when the at least one locking arrangement is in the open position, where the first distance is less than the second distance, where the at least one locking segment has a cam surface, by which the radius from the centre of rotation to the cam surface varies along the circumference of the locking segment, whereby the at least one locking segment has a cam surface section at a corresponding first radius and a second radius, whereby the first radius is larger than the second radius,wherein the first radius of the at least one locking segment is larger than the first distance at the outer position of the at least one locking piston, when the locking arrangement is in the locked position, and smaller than the second distance at the inner position of the at least one locking piston, when the at least one locking arrangement is in the open position, and wherein the second radius is smaller than the first distance at the outer position of the at least one locking piston, when the at least one locking arrangement is in the locked position and smaller than the second distance at the inner position of the at least one locking piston, when the at least one locking arrangement is in the open position.
1 Assignment
0 Petitions
Accused Products
Abstract
A quick coupler (1) for attaching a tool (2), comprising an attachment bracket with two parallel attachment pins (3a, 3b), to an earth moving vehicle, where the quick coupler (1) comprises a frame (4) with a first cutout (5) and a second cutout (6) arranged substantially perpendicular to each other, which are adapted to cooperate with the respective attachment pin (3a, 3b) of the tool (2). The quick coupler (1) further comprises at least one, in relation to the frame (4) moveable locking arrangement (9), adapted to delimit the second cutout (6) in a direction parallel to the first cutout (5), whereby one of the attachment pins (3aq, 3b) of the tool is locked in the second cut-out (6) and at least one locking segment (18a, 18b) arranged to be rotated in relation to the frame (4) in at least a first and a second direction between different positions, whereby the locking segment (18a, 18b) in at least one position delimit the first cut-out (5) and locks the second of the attachment pins (3a, 3b) of the tool.
11 Citations
7 Claims
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1. A quick coupler for attaching a tool, comprising an attachment bracket with two parallel attachment pins, to an earth moving vehicle, wherein the quick coupler comprises
a frame with a first cut-out and a second cut-out arranged substantially perpendicular to each other, where each respective cut-out is adapted to cooperate with a respective attachment pin of the tool, at least one locking arrangement, moveable in relation to the frame and adapted to delimit the second cut-out in a direction parallel to the first cut out, whereby one of the attachment pins of the tool is locked up in the cutout, one single actuator arranged in the frame adapted to move the at least one locking arrangement between a first open position, corresponding to a retracted position of the actuator, and a second locked position, corresponding to an extended position of the actuator, at least one locking piston arranged to be moved between an inner position and an outer position, and at least one locking segment arranged to be rotated in relation to the frame in a first direction and a second direction between different positions, whereby the locking segment in at least one position delimits the first cut-out, characterized in that the one single actuator is arranged between the at least one locking arrangement and the at least one locking piston and is arranged to move both the at least one locking arrangement and the at least one locking piston in relation to the frame, that the at least one locking segment is arranged in relation to the at least one locking piston so that the at least one locking segment is prevented from rotating in the first direction, to prevent removal of the respective attachment pin from the first cut-out, when the locking arrangement is in the second locked position and is allowed to rotate in the first direction, to allow removal of the respective attachment pin from the first cut-out, when the at least one locking arrangement is in the first open position, that the at least one locking segment is arranged in relation to the locking piston so that the at least one locking segment is allowed to rotate in the second direction, to allow insertion of the respective attachment pin into the first cut-out, when the at least one locking arrangement is in either the locked position or the open position, where the at least one locking segment is arranged to rotate in relation to the at least one locking piston, wherein the at least one locking piston has an outer end and an inner end whereby the at least one locking segment is arranged in relation to the at least one locking piston so that at least some point on the outer end of the at least one locking piston is located at a first distance from the centre of rotation of the at least one locking segment at the outer position of the at least one locking piston, when the at least one locking arrangement is in the locked position, and where at least some point on the outer end of the at least one locking piston is located at a second distance from the centre of rotation of the at least one locking segment at the inner position of the at least one locking piston, when the at least one locking arrangement is in the open position, where the first distance is less than the second distance, where the at least one locking segment has a cam surface, by which the radius from the centre of rotation to the cam surface varies along the circumference of the locking segment, whereby the at least one locking segment has a cam surface section at a corresponding first radius and a second radius, whereby the first radius is larger than the second radius, wherein the first radius of the at least one locking segment is larger than the first distance at the outer position of the at least one locking piston, when the locking arrangement is in the locked position, and smaller than the second distance at the inner position of the at least one locking piston, when the at least one locking arrangement is in the open position, and wherein the second radius is smaller than the first distance at the outer position of the at least one locking piston, when the at least one locking arrangement is in the locked position and smaller than the second distance at the inner position of the at least one locking piston, when the at least one locking arrangement is in the open position.
Specification