JP2009035416A - Brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake device 101 of an elevator hoist capable of preventing a brake shoe 5 from being brought into contact with a braking face 31 of a rotary drum 2 in a non-braking mode. <P>SOLUTION: In the brake device 101, doglegged shape link mechanism parts 50 are mounted on the brake shoe 5 for braking the rotation of the rotary drum 2 by pressing the rotary drum 2 from its inner circumferential side at total four parts in the upper and lower sides, and this side of the depth sides. The link mechanism parts 50 are connected to the brake shoe 5 by engaging a pin d50d having a long hole 50e on one end side thereof and fixed to the brake shoe 5. The link mechanism parts 50 are rotatably connected to a bent part by a torque receiving part 16 of a fixed member 15 and a pin c50c. In addition, the link mechanism parts 50 have a roller 50a on the other end side. The link mechanism parts 50 are rotated around the pin c50c as the axis when the brake shoe 5 is retracted from the rotary drum 2, and abuts the roller 50a on a braking face 31 of the rotary drum 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a brake device for an elevator hoisting machine, for example.

Elevator hoisting machine in which the brake shoes are linearly arranged with respect to the pressing direction of the spring, and the movable parts (armature and brake shoes) that generate braking force by pressing the rotating drum are not fixed to the fixed parts In the brake mechanism, the rotational torque (brake torque, braking torque) applied to the brake shoe during braking of the rotary drum is absorbed by the brake shoe coming into contact with a torque receiving portion that is fixedly provided as the structure of the hoisting machine. The Therefore, the elevator hoisting machine is designed so that the clearance between the brake shoe and the torque receiving portion is as narrow as several tenths of a millimeter so that the rotating drum and the brake shoe do not rotate when brake torque is generated.
For this reason, when the brake shoe tilts due to disturbance during operation, the brake shoe comes into contact with the corner end of the torque receiver, but the brake shoe tilts and the brake shoe contacts with the corner end of the torque receiver. It is desirable not to occur in order to smooth the operation of the brake shoe that moves forward and backward with respect to the rotating drum and to extend the life of the lining that contacts the rotating drum in front of the brake shoe.

For example, in Patent Document 1, a direct acting brake in which a braking member (brake shoe) moves linearly while being guided by a torque receiving portion (a notch portion provided so as to face both side surfaces of the braking member) is used. Disclosure.
Further, for example, Patent Document 2 discloses that a clearance between the braking member and the braking surface of the rotating drum is secured using an adjusting member that adjusts the posture (tilt) of the braking member when braking is released.
International Publication No. 2005/019085 Pamphlet International Publication No. 2004/036080 Pamphlet

  In the direct acting brake of Patent Literature 1, a gap is provided between the torque receiving portion and the braking member so that the torque receiving portion can linearly guide the braking member. The braking member moves to the fixed iron core side by energization of the electromagnetic coil of the electromagnet mechanism and releases the braking on the rotating drum. At this time, the braking member may be inclined by a gap with the torque receiving portion, and the braking member may come into contact with the braking surface of the rotating drum due to this inclination. Then, rubbing noise between the braking member and the rotating drum and wear of the braking member occur.

  Further, in Patent Document 2, the adjustment member is a protrusion provided on the fixed member, and regulates the inclination of the braking member by adjusting the inclination of the braking member that is in contact when the braking to the rotating drum is released. is there.

An object of the present invention is, for example, to obtain a brake device that can prevent a braking member from contacting a braking surface of a rotating drum by tilting the braking member during non-braking.
In particular, it is an object of the present invention to obtain a brake device that adjusts the inclination of the braking member by an adjusting member other than the protrusion provided on the fixing member.

  The brake device according to the present invention is disposed on the inner peripheral side of the rotating drum, and when the front and rear of the rotating drum advances and moves forward with respect to the rotating drum, the inner peripheral surface of the rotating drum is pressed to rotate the rotating drum. A brake device including a brake shoe for braking the shoe, a shoe connecting portion connected to the brake shoe, and an interlocking end portion that advances and retracts with respect to the rotating drum in conjunction with the advance and retreat of the brake shoe via the shoe connecting portion. The link mechanism portion is interlocked with the advancement of the brake shoe with respect to the rotating drum, and the interlocking end portion is retracted with respect to the rotating drum, and the link mechanism portion of the brake shoe with respect to the rotating drum is The interlocking end moves forward with respect to the rotating drum in conjunction with retreat, and the advanced interlocking end contacts the inner peripheral surface of the rotating drum. More, the retraction of the brake shoe linked to the interlocking end the shoe connecting part which comprises suppressing the portion connecting to the brake shoe.

  According to the present invention, for example, when the adjustment member (link mechanism portion) is in contact with the braking surface (inner peripheral surface) of the rotating drum, the backward movement of the braking member is suppressed at the connecting portion with the braking member (brake shoe). By doing so, the braking member can be retracted only at the connecting portion of the adjusting member that is not in contact with the braking surface, and the inclination of the braking member can be adjusted. In other words, the brake device of the present invention can prevent the braking member from coming into contact with the braking surface of the rotating drum, and can obtain effects such as prevention of frictional noise between the braking member and the rotating drum and reduction in wear of the braking member. Can do. In addition, it is also possible to obtain an effect such as smoother movement of the braking member with respect to the rotating drum.

Embodiment 1 FIG.
FIG. 1 is a front sectional view of a hoisting machine 100 according to the first embodiment. In FIG. 1, only the fixing member 15 portion is shown in a sectional view, and other portions such as the brake shoe 5 portion connected to the link mechanism portion 50 are shown in front views. The same applies to each figure (FIG. 2, FIG. 4 to FIG. 7) showing the brake device 101 provided in the hoisting machine 100.
FIG. 2 is an enlarged view of the brake device 101 during braking in the first embodiment.
FIG. 3 is a cross-sectional view taken along line AA of the brake device 101 according to the first embodiment.
The brake device 101 and the hoisting machine 100 according to the first embodiment will be described below with reference to FIGS.

  In FIG. 1, a hoisting machine 100 is provided with a rotating drum 2 (rotor drum, brake drum) that rotates about a shaft 102, and the rotating drum 2 has a braking surface 31 (inner peripheral surface, drum surface) on its inner surface. Have. Further, the hoisting machine 100 is provided with a brake device 101 on the inner peripheral side of the rotary drum 2. The rotating drum 2 and the brake device 101 are stored in a housing 14 that is a base of the hoisting machine 100.

  In the elevator hoisting machine 100, a rope for suspending an elevator car is wound around a driving sheave (not shown), and a weight for assisting the raising and lowering of the elevator car is suspended at the other end of the rope. ing. The driving sheave is located on the back side (back side) of the rotating drum 2 in FIG. 1 and is coupled to the rotating drum 2. In the hoisting machine 100, a motor (not shown) rotates the driving sheave left and right to raise and lower the elevator car, and presses and brakes the rotating drum 2 that rotates in conjunction with the driving sheave from the inside. The elevator car lifted and lowered is braked.

The brake device 101 (electromagnet mechanism, electromagnetic magnet) includes a fixed member 15, a movable iron core 4 (armature) opposed to the fixed member 15, and a pressing spring 12 that pushes out the electromagnetic coil 13 and the movable iron core 4 provided on the fixed member 15. Have
A brake shoe 5 (braking member) is attached to the outer side of the movable iron core 4 (on the braking surface 31 side) via an adjustment bolt 35, and the brake shoe 5 facing the braking surface 31 of the rotary drum 2 rotates at the tip of the brake shoe 5. A lining 17 that is a friction material that comes into contact with the braking surface 31 of the drum 2 is attached.
The adjustment bolt 35 has a convex spherical surface, and the brake shoe 5 is provided with a spherical seat 36 formed in a concave spherical surface that engages with the spherical surface of the adjustment bolt 35. Further, a leaf spring 37 hooked on the head of the adjustment bolt 35 is attached to the brake shoe 5 so as to sandwich the adjustment bolt 35 and the spherical seat 36. Further, the adjusting bolt 35 screwed and coupled to the threaded movable iron core 4 is fixed with a set nut 38. Then, the amount by which the brake shoe 5 advances and retreats with respect to the braking surface 31 of the rotary drum 2 is adjusted by advancing and retracting the adjusting bolt 35 by a screw action. The clearance between the lining 17 of the brake shoe 5 and the braking surface 31 of the rotating drum 2 during non-braking is adjusted to about several hundredths of a millimeter, and the amount by which the brake shoe 5 moves forward with respect to the rotating drum 2 during braking is 10 It is adjusted to a few millimeters per minute. The brake shoe 5 presses the lining 17 against the braking surface 31 of the rotating drum 2 by the difference between the clearance amount with respect to the rotating drum 2 and the advance amount, thereby braking the rotation of the rotating drum 2.

The brake device 101 excites the fixed member 15 by energizing the electromagnetic coil 13, attracts the movable iron core 4 against the spring 12 against the spring 12, and pulls the brake shoe 5 from the braking surface 31 of the rotary drum 2. Pull apart. Thus, the brake device 101 releases the braking force on the rotating drum 2.
Further, the brake device 101 cuts off the energization to the electromagnetic coil 13 so that the fixed member 15 is not excited, pushes the movable iron core 4 by the pressing spring 12, and the lining 17 of the brake shoe 5 is moved to the braking surface of the rotary drum 2. Press to 31. Thus, the brake device 101 generates a braking force with respect to the rotation of the rotary drum 2.

  The brake device 101 according to the first embodiment adjusts the inclination of the brake shoe 5 by bringing the tip into contact with the braking surface 31 of the rotating drum 2 when the brake shoe 5 moves backward with respect to the braking surface 31 of the rotating drum 2. 50.

  In particular, the brake device 101 according to the first embodiment includes a link mechanism unit 50 on the upstream side in the rotation direction of the rotary drum 2 and on the downstream side in the rotation direction of the rotary drum 2.

  Further, the brake device 101 according to the first embodiment includes two link mechanism portions that are opposed to each other with the brake shoe 5 interposed therebetween on either the upstream side in the rotation direction of the rotary drum 2 or the downstream side in the rotation direction of the rotary drum 2. 50.

  Further, the brake device 101 according to the first embodiment includes two link mechanism portions 50 that are positioned diagonally across the brake shoe 5 between the upstream side and the downstream side in the rotation direction of the rotary drum 2. .

In FIG. 2, the link mechanism unit 50 provided in the brake device 101 according to the first embodiment includes a lever 50b that forms a dogleg shape (or a U-shape, an L-shape, a V-shape, etc.), and a lever 50b. Of the fixing member 15 at the bent portion of the lever 50b, a long hole 50e (shoe coupling portion) located on one end side of the roller 50a, a roller 50a (interlocking end portion, rotating body) located on the other end side of the lever 50b. 16 (first fixing portion, second fixing portion) and a pin c50c (fixing portion connecting portion) to be connected.
The roller 50a is rotatably attached to the tip of the lever 50b, and rotates in accordance with the rotation of the rotating drum 2 when contacting the braking surface 31 of the rotating drum 2.
The pin d50d (shoe fixing pin) passes through the elongated hole 50e and is fixed to the brake shoe 5. The link mechanism 50 is attached to the brake shoe 5 via the pin d50d engaged with the elongated hole 50e.
The link mechanism unit 50 is rotatably mounted with the pin c50c as a rotation axis, and the pin d50d moves in the extending direction of the elongated hole 50e in accordance with the rotation of the link mechanism unit 50.

FIG. 3 shows a cross section of the brake device 101 as viewed from the line AA shown in FIG.
In FIG. 3, the brake shoe 5 is opposed to the two link mechanism portions 50 arranged to face each other with the brake shoe 5 sandwiched between the upper part of the brake shoe 5 and the brake shoe 5 sandwiched between the lower part of the brake shoe 5. A total of four link mechanism parts 50 including two link mechanism parts 50 arranged so as to be attached are attached. That is, the brake shoe 5 has two link mechanism portions 50 attached to the upper and lower portions on the left and right side surfaces in FIG. In FIG. 2, the brake shoe 5 has a link mechanism 50 attached to four movable iron cores at the top and bottom and in front.

FIG. 4 is an enlarged view of the brake device 101 during braking in the first embodiment.
Based on FIG. 2 and FIG. 4, the operation | movement at the time of braking of the brake device 101 which brakes rotation of the rotating drum 2 in Embodiment 1 is demonstrated.

In FIG. 2, when the rotation of the rotary drum 2 by a motor (not shown) is stopped, the brake device 101 stops energizing the electromagnetic coil 13 and makes the fixing member 15 non-magnetized. Then, the pressing spring 12 extends to push the movable iron core 4 away from the fixed member 15, and the brake shoe 5 connected to the movable iron core 4 via the adjustment bolt 35 advances toward the rotary drum 2, and the brake shoe 5 The lining 17 positioned in front of the abutting portion contacts the braking surface 31 of the rotating drum 2 to brake the rotation of the rotating drum 2.
At this time, in the link mechanism portion 50, the elongated hole 50e portion engaged with the pin d50d fixed to the brake shoe 5 moves forward with respect to the rotary drum 2 in conjunction with the brake shoe 5, and the elongated hole 50e portion rotates. Along with the forward movement operation with respect to the drum 2, the pin c <b> 50 c rotates about the rotation shaft, and the roller 50 a moves backward with respect to the rotation drum 2. As a result, the roller 50 a of the link mechanism unit 50 is in a non-contact state with the braking surface 31 of the rotary drum 2. That is, the brake shoe 5 at the time of braking with the link mechanism portion 50 attached in a leg shape (arm shape) is opened in conjunction with the forward movement operation with respect to the rotating drum 2, and each leg is not in contact with the rotating drum 2. To.

  Here, even when the hoisting machine 100 stops the motor and stops the rotation of the rotating drum 2, the weight of the elevator car and the weight attached to the other end of the rope that suspends the elevator car (in the car) The brake shoe 5 that brakes the rotation of the rotating drum 2 and the rotating drum 2 has a weight and a weight on which the elevator car is suspended. Rotational torque (braking torque) that tries to rotate in either direction with the side is applied.

For example, in FIG. 4, when a counterclockwise rotational torque is applied to the rotary drum 2, the brake shoe 5 rotates downward via the lining 17 (rotational downstream side of the rotational torque applied to the rotary drum 2, the rotational destination side). Torque is applied. At this time, the leaf spring 37, the adjusting bolt 35 that forms a convex hemispherical tip, and the brake shoe 5 that is connected to the movable iron core 4 via the concave hemispherical spherical seat 36 are rotated by the spherical seat 36 and the leaf spring 37. Due to this elasticity, the rotating torque is inclined downward and contacts the torque receiving portion 16 (second fixing portion) of the fixing member 15 located on the lower side of the brake shoe 5. Further, the link mechanism portion 50 moves the pin d50d fixed to the brake shoe 5 downward in the extending direction of the elongated hole 50e so that the brake shoe 5 is a torque receiving portion of the fixing member 15 positioned below the brake shoe 5. 16 is contacted.
Then, by absorbing the rotational torque applied to the brake shoe 5 by the torque receiving portion 16 (second fixing portion) of the fixing member 15 with which the brake shoe 5 abuts, the brake device 101 can sufficiently apply the braking force to the rotating drum 2. Can be secured.

FIG. 5 is an enlarged view of the brake device 101 during non-braking in the first embodiment.
Next, the operation at the time of non-braking of the brake device 101 that does not brake the rotation of the rotating drum 2 in the first embodiment will be described.

In FIG. 5, when the rotating drum 2 is rotated by a motor, the brake device 101 applies a current to the electromagnetic coil 13 to magnetize the fixed member 15, presses the movable iron core 4 by the fixed member 15 that is a magnet, and extends the spring 12. It attracts with a stronger force against the force. Then, the brake shoe 5 connected to the movable iron core 4 is retracted from the rotary drum 2, the lining 17 positioned in front of the brake shoe 5 is separated from the braking surface 31 of the rotary drum 2, and braking against the rotation of the rotary drum 2 is released. The
At this time, the pin d50d fixed to the brake shoe 5 moves through the long hole 50e of the link mechanism portion 50 in conjunction with the backward movement of the brake shoe 5 with respect to the rotating drum 2. In the link mechanism 50, the elongated hole 50e portion engaged with the pin d50d performs the retreating operation with respect to the rotating drum 2 as the pin d50d moves, and the revolving operation of the elongated hole 50e portion with respect to the rotating drum 2 is performed. The roller 50a moves forward with respect to the rotating drum 2 by rotating around c50c. As a result, the roller 50 a of the link mechanism unit 50 abuts on the braking surface 31 of the rotary drum 2 and rotates in accordance with the rotation of the rotary drum 2.

FIG. 6 is an enlarged view of the brake device 101 when the brake is released in the first embodiment.
FIG. 7 is an enlarged view of the conventional brake device 101 when the brake is released.
In the first embodiment, the brake device 101 is inclined to the brake shoe 5 when the movable iron core 4 is attracted to the fixed member 15 and the brake shoe 5 is moved backward from the rotary drum 2 in order to release the braking against the rotation of the rotary drum 2. The reverse operation of the brake shoe 5 when this occurs will be described below with reference to FIGS.

The brake device 101 of the elevator hoisting machine 100 receives the rotational torque of the rotary drum 2 applied to the brake shoe 5 at the time of braking by the torque receiving portion 16 of the fixing member 15, so that the brake shoe 5 has a leaf spring 37 and an adjustment bolt 35. Further, it is connected to the movable iron core 4 via the spherical seat 36 and has a structure that can be tilted by the rotation of the spherical seat 36 and the elasticity of the leaf spring 37. Further, the separation interval between the lining 17 of the brake shoe 5 and the braking surface 31 of the rotary drum 2 during non-braking is very narrow, about several hundredths of a millimeter.
For this reason, when the brake shoe 5 is tilted even when the brake shoe 5 is retracted from the rotary drum 2 when the brake is released, the conventional brake device 101 without the link mechanism 50 has a lining as shown in FIG. One (one end side) 17 contacts the braking surface 31 of the rotating drum 2, and frictional noise between the lining 17 and the braking surface 31 and wear of the lining 17 occur.

  On the other hand, in the brake device 101 according to the first embodiment having the link mechanism unit 50, the roller 50a of the link mechanism unit 50 is operated in conjunction with the backward movement of the brake shoe 5 with respect to the rotary drum 2 when the brake is released with respect to the rotation of the rotary drum 2. By moving forward and coming into contact with the braking surface 31 of the rotating drum 2, the brake shoe 5 moves backward with respect to the rotating drum 2 in the long hole 50e portion of the link mechanism 50 where the roller 50a contacts the braking surface 31 of the rotating drum 2. Suppress and correct the inclination of the brake shoe 5.

In the brake device 101 according to the first embodiment, when the brake shoe 5 is tilted when the brake shoe 5 is moved backward with respect to the rotating drum 2, first, four links attached to the upper and lower sides of the brake shoe 5 and the front side of the brake shoe 5. One or two link mechanism portions 50 of the mechanism portions 50 abut the roller 50 a against the braking surface 31 of the rotary drum 2. For example, in FIG. 6, when the brake shoe 5 is tilted downward when the brake shoe 5 is moved backward with respect to the rotating drum 2, the four link mechanism portions 50 attached to the brake shoe 5 are inclined to the side on which the brake shoe 5 is tilted. Only the attached link mechanism B52 contacts the braking surface 31 of the rotary drum 2.
At this time, the pin d50d is positioned at the end of the long hole 50e in the long hole 50e of the link mechanism 50 with which the roller 50a abuts, and the pin d50d cannot move through the long hole 50e any more. As a result, the brake shoe 5 is restrained at the portion where the pin d50d that engages with the elongated hole 50e of the link mechanism portion 50 with which the roller 50a abuts, and the backward movement with respect to the rotating drum 2 is suppressed. Further, in the other part, that is, the part where the pin d50d that engages with the long hole 50e of the link mechanism part 50 where the roller 50a is not in contact is located, the brake shoe 5 is not restrained and is not restricted to the rotary drum 2. Retreat is possible. For example, in FIG. 6, the brake shoe 5 is restrained at a portion where the pin d50d that engages with the long hole 50e of the link mechanism portion B52 is located, and is engaged with the long hole 50e of the link mechanism portion A51 (or other 50). The portion where the pin d50d to be moved is located is movable in the backward direction.
Further, when the brake device 101 attracts the movable iron core 4 to the fixed member 15 and retracts the brake shoe 5 from the rotary drum 2, the brake shoe 5 is moved to an unconstrained movable part (links other than the link mechanism B52 in FIG. 6). In the mechanism portion 50 (for example, the portion where the pin d50d that engages with the link mechanism portion A51) is located, the roller 50a of the link mechanism portion 50 moves backward until it contacts the braking surface 31 of the rotary drum 2.
Thus, the four link mechanism portions 50 attached to the brake shoe 5 sequentially bring the roller 50a into contact with the braking surface 31 of the rotary drum 2 and restrict the backward movement of the brake shoe 5 at the connecting portion. When the movable iron core 4 is attracted to the fixed member 15 by the brake device 101, the rollers 50a of all the link mechanism portions 50 abut against the braking surface 31 of the rotary drum 2, and the brake shoes 5 are connected to the link mechanism portions 50. Thus, the inclination is corrected, and the lining 17 of the brake shoe 5 is separated from the braking surface 31 of the rotating drum 2. That is, the brake device 101 according to the first embodiment can release the braking against the rotation of the rotating drum 2 in a state where the lining 17 of the brake shoe 5 is reliably separated from the braking surface 31 of the rotating drum 2.
As a result, it is possible to prevent frictional noise between the lining 17 of the brake shoe 5 and the braking surface 31 of the rotating drum 2 and wear of the lining 17 of the brake shoe 5 during non-braking.

  In the first embodiment, the brake device 101 that corrects the posture of the brake shoe 5 by providing the link mechanism portion 50 in the brake shoe 5 and pressing the braking surface 31 of the rotating drum 2 with the tip (roller 50a) thereof has been described.

In particular, the brake device 101 having the following configuration has been described as a brake device 101 for an elevator hoisting machine that rotates by driving the hoisting machine 100 and brakes the rotary drum 2 having the braking surface 31.
(A) The fixing member 15 provided in the hoisting machine 100.
(B) An electromagnet mechanism (electromagnetic coil 13) provided on the fixing member 15.
(C) A braking member (brake shoe 5) that moves forward and backward with respect to the braking surface 31 of the rotating drum 2 by an electromagnet mechanism to brake and release the rotating drum 2.
(D) Two or more levers (link mechanism portion 50) that are rotatably provided on the fixing member 15 and have one end (the long hole 50e) connected to the braking member and rotate in conjunction with the advancement and retraction of the braking member.
The brake device 101 is characterized in that when the braking member is separated from the braking surface 31 of the rotary drum 2, the other end portion (roller 50 a) of the lever contacts the braking surface.

In the above description, the four link mechanism portions 50 are attached to the brake shoe 5. However, five or more link mechanism portions 50 may be attached to the brake shoe 5, or three or less link mechanism portions 50 may be braked. It may be attached to the shoe 5.
8, 9, and 10 are cross-sectional views taken along line AA of the brake device 101 according to the first embodiment.
When three or less link mechanism parts 50 are attached to the brake shoe 5, it is preferable to attach two link mechanism parts 50 that face each other in the longer extending direction between the height direction and the width direction of the brake shoe 5. As a result, the inclination of the brake shoe 5 can be corrected in the direction in which the inclination amount increases even at the same inclination angle.
For example, when the brake shoe 5 has a length that is longer in the vertical direction than the left and right width direction as in the first embodiment, as shown in FIG. A link mechanism 50 may be provided at the upper part of the shoe 5 and at the lower part of the brake shoe 5, and as shown in FIG. 9, the link attached to one of the left and right sides of the brake shoe 5 at the upper part of the brake shoe 5. You may provide the link mechanism part 50 attached in the diagonally opposite position on both sides of the link mechanism part 50 and the brake shoe 5 in the lower part of the mechanism part 50 and the brake shoe 5. However, as shown in FIG. 10, two link mechanism portions 50 may be provided so as to face each other with the brake shoe 5 sandwiched between either one of the upper and lower sides of the brake shoe 5. You may make it prepare.

  Although the brake device 101 of the elevator hoisting machine 100 has been described in the first embodiment, the brake device 101 having the link mechanism unit 50 can lift and lower objects even when used in the hoisting machine 100 other than the elevator. For example, it may be used for a tire brake of a car.

1 is a front sectional view of a hoisting machine 100 according to Embodiment 1. FIG. FIG. 2 is an enlarged view of the brake device 101 during braking in the first embodiment. FIG. 3 is a cross-sectional view taken along line AA of the brake device 101 according to the first embodiment. FIG. 2 is an enlarged view of the brake device 101 during braking in the first embodiment. FIG. 3 is an enlarged view of the brake device 101 during non-braking in the first embodiment. FIG. 3 is an enlarged view of the brake device 101 when braking is released in the first embodiment. The enlarged view of the brake device 101 at the time of the conventional braking release. FIG. 3 is a cross-sectional view taken along line AA of the brake device 101 according to the first embodiment. FIG. 3 is a cross-sectional view taken along line AA of the brake device 101 according to the first embodiment. FIG. 3 is a cross-sectional view taken along line AA of the brake device 101 according to the first embodiment.

Explanation of symbols

  2 rotating drum, 4 movable iron core, 5 brake shoe, 12 pressing spring, 13 electromagnetic coil, 14 housing, 15 fixing member, 16 torque receiving portion, 17 lining, 31 braking surface, 35 adjusting bolt, 36 spherical seat, 37 leaf spring , 38 Lock nut, 50 Link mechanism, 50a Roller, 50b Lever, 50c Pin c, 50d Pin d, 50e Long hole, 51 Link mechanism A, 52 Link mechanism B, 100 Hoisting machine, 101 Brake device, 102 axis.

Claims (7)

A brake shoe is provided on the inner peripheral side of the rotating drum and presses the inner peripheral surface of the rotating drum to brake the rotation of the rotating drum when the moving forward and backward with respect to the rotating drum and moves forward with respect to the rotating drum. In the brake device,
A link mechanism portion having a shoe connecting portion connected to the brake shoe, and an interlocking end portion that advances and retracts with respect to the rotating drum in conjunction with the advance and retreat of the brake shoe via the shoe connecting portion,
In the link mechanism, the interlocking end moves backward with respect to the rotating drum in conjunction with the advancement of the brake shoe relative to the rotating drum, and the interlocking end moves in conjunction with the retracting of the brake shoe relative to the rotating drum. Is moved forward with respect to the rotating drum, and the interlocking end portion that has advanced advances abuts against the inner peripheral surface of the rotating drum, so that the shoe connecting portion causes the brake shoe to move backward with respect to the interlocking end portion. A brake device, wherein the brake device is suppressed at a portion connected to a shoe. The brake device further includes:
A first fixed portion that is fixed at an inner peripheral side of the rotating drum and is located upstream of the brake shoe in the rotating direction of the rotating drum; and a rotating direction of the rotating drum relative to the brake shoe. A second fixing portion located on the downstream side, and a fixing member for disposing the brake shoe between the first fixing portion and the second fixing portion,
The link mechanism portion is disposed on either the upstream side in the rotation direction of the rotating drum or the downstream side in the rotation direction of the rotating drum to form a dogleg shape, and the one end side of the dogleg shape A shoe connecting portion, the interlocking end portion on the other end side of the U-shape, the first fixing portion of the fixing member and the second fixing of the fixing member on the bent portion of the U-shape; And a fixed portion connecting portion that is connected to a fixing portion located on a side where the link mechanism portion is disposed, and the fixed portion connecting portion is interlocked with the advancement and retreat of the brake shoe connected to the shoe connecting portion. The brake device according to claim 1, wherein the interlocking end portion is moved forward and backward with respect to the rotating drum by rotating around the rotating shaft. The link mechanism portion has an elongated hole as the shoe connecting portion extending from one end side where the shoe-shaped shoe connecting portion is located toward the bent portion of the dog-shaped shape, and penetrates the elongated hole. The shoe fixing pin fixed to the brake shoe is connected to the brake shoe, and the shoe fixing pin moves in the extending direction of the elongated hole in conjunction with the advancement / retraction of the brake shoe. The brake device described.   4. The linking end of the link mechanism is a rotating body that rotates in accordance with the rotation of the rotating drum when abutting against the inner peripheral surface of the rotating drum. A brake device according to claim 1. The brake device is
The brake device according to any one of claims 1 to 4, wherein the link mechanism section is provided on an upstream side in the rotation direction of the rotating drum and a downstream side in the rotation direction of the rotating drum. The brake device is
2. The two link mechanism portions facing each other with the brake shoe interposed therebetween, on either the upstream side in the rotation direction of the rotary drum or the downstream side in the rotation direction of the rotary drum. The brake device according to claim 5. The brake device is
2. The two link mechanism portions positioned diagonally across the brake shoe between an upstream side in the rotational direction of the rotary drum and a downstream side in the rotational direction of the rotary drum. Item 7. The brake device according to any one of items 6.

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