초록 ▼

The invention relates to an elevator brake, said elevator comprising a hoisting machine (1) provided with at least a frame part (2) and a traction sheave (3), and a brake drum (4) arranged to be rotatable with the traction sheave (3) and provided with a braking surface (5), and a brake (6) having an

The invention relates to an elevator brake, said elevator comprising a hoisting machine (1) provided with at least a frame part (2) and a traction sheave (3), and a brake drum (4) arranged to be rotatable with the traction sheave (3) and provided with a braking surface (5), and a brake (6) having an effect on the rotary motion of the traction sheave (3), said brake (6) comprising at least one brake block (8) provided with a braking surface, which brake block (8) has been arranged to act on the braking surface (5) of the brake drum (4) with a force directed substantially towards the braking surface (5). To allow adjustment of the size of the air gap (8a) between the braking surface of the brake block (8) and the braking surface (5) of the brake drum (4), the brake (6) is provided with at least one eccentric adjusting element (11).

대표청구항 ▼

1. An elevator brake, comprising: a hoisting machine provided with at least a frame part and a traction sheave;a brake drum arranged to be rotatable with the traction sheave and provided with a braking surface; anda brake configured to provide a braking effect on the rotary motion of the traction sh

1. An elevator brake, comprising: a hoisting machine provided with at least a frame part and a traction sheave;a brake drum arranged to be rotatable with the traction sheave and provided with a braking surface; anda brake configured to provide a braking effect on the rotary motion of the traction sheave, said brake comprising at least one brake block provided with a braking surface, said brake block being arranged to act on the braking surface of the brake drum with a force directed substantially towards the braking surface,wherein the brake is provided with a first eccentric adjusting element and a second eccentric adjusting element, arranged on a first end and a second end of the brake, respectively, to adjust size of an air gap between the braking surface of the brake block and the braking surface of the brake drum, andwherein the second eccentric adjusting element at the second end of the brake is placed in a substantially loose through hole whose diameter is substantially larger than the diameter of the second eccentric adjusting element, and wherein a portion of the periphery of the substantially loose through hole which lies closer to the brake drum directly contacts and bears against the second eccentric adjusting element to form a stop face for the second eccentric adjusting element. 2. The elevator brake according to claim 1, wherein the first and second eccentric adjusting elements are eccentric shafts, and the brake is hingedly secured to the hoisting machine by the eccentric shafts. 3. The elevator brake according to claim 2, wherein the two eccentric shafts are positioned on each side of the brake block relative to the direction of the plane of rotation of the braking surface. 4. The elevator brake according to claim 3, wherein the two eccentric shafts are substantially parallel relative to each other and at the same time also substantially parallel to the axis of rotation of the brake drum. 5. The elevator brake according to claim 3, wherein the brake has a mounting hole at a first end thereof, said mounting hole accommodating the first eccentric shaft in a substantially clearance-free manner, the first eccentric adjusting element being rotatable about a center axis thereof, and the brake has, at a second end thereof, the second eccentric shaft and the stop face, said stop face being configured to be pressed by a spring element against a surface of the second eccentric shaft which faces towards the braking surface of the brake drum. 6. The elevator brake according to claim 1, wherein the first eccentric adjusting element and the second eccentric adjusting element are positioned on each side of the brake block relative to the direction of the plane of rotation of the braking surface. 7. The elevator brake according to claim 1, wherein the first and second eccentric adjusting elements are substantially parallel relative to each other and at the same time also substantially parallel to the axis of rotation of the brake drum. 8. The elevator brake according to claim 1, wherein the brake has a mounting hole at a first end thereof, said mounting hole accommodating the first eccentric adjust element in a substantially clearance-free manner, the first eccentric adjusting element being rotatable about a center axis thereof, and the brake has, at a second end thereof, the second eccentric adjusting element and the stop face, said stop face being configured to be pressed by a spring element against a surface of the second eccentric adjusting element which faces towards the braking surface of the brake drum. 9. The elevator brake according to claim 8, wherein a center axis of the mounting hole lies substantially in a tangential plane of the point of contact between the brake block and the braking surface of the brake drum. 10. The elevator brake according to claim 1, wherein the adjustment of the air gap of the brake is configured to be performed by rotating the at least one of the first and second eccentric adjusting elements a center axis thereof. 11. The elevator brake according to claim 1, wherein the brake includes a mounting bracket configured to secure the brake to the frame part, the mounting bracket including a first through hole for accommodating the first eccentric adjusting element and a second through hole for accommodating the second eccentric adjusting element, the second through hole, being said substantially loose through hole, having a larger diameter than the first through hold. 12. The elevator brake according to claim 11, wherein the second parts of the first and second eccentric adjusting elements are accommodated in the first and second through holes of the mounting bracket respectively, and the first parts of the first and second eccentric adjusting elements are accommodated are accommodated in through holes provided in the frame part.