JP5846924B2 - Braking device - Google Patents

Description

  The present invention relates to a braking device used, for example, in an elevator hoisting machine, and more particularly to a braking device provided with a buffer member between a field and an armature.

Conventionally, as a braking device for an elevator hoist, a buffer member is provided between the field and the armature in order to reduce a collision sound caused by a collision between the field and the armature.
The buffer member has an appropriate temperature range to ensure a predetermined elasticity, and the heating control device measures the current value of the energized electromagnetic coil and calculates the resistance value of the electromagnetic coil from the current value. If the estimated temperature of the electromagnetic coil is calculated and the estimated temperature is lower than the set reference temperature, a current sufficient to heat the buffer member is supplied to the electromagnetic coil, and a weak current is supplied to the electromagnetic coil during braking. It is known that the estimated temperature is calculated by heating the buffer member by increasing the weak current (see, for example, Patent Document 1).

JP 2006-89162 A

  However, the braking device configured as described above must actively heat the rubber at low temperatures in order to prevent the impact sound from increasing at low temperatures, and therefore, it is necessary to introduce a heating control device. There is a problem that it is necessary to consume electric power to operate the heating device.

  An object of the present invention is to solve such a problem, and an impact sound due to a collision between a field and an armature is increased by the influence of an ambient temperature without using a heating control device that consumes electric power. An object of the present invention is to obtain a braking device that suppresses this.

The braking device according to the present invention includes an armature capable of reciprocating in a direction in which a shoe attached to one surface is in contact with and separated from the braking surface;
A field provided opposite to the other side of the armature;
An electromagnetic coil provided in the field and energizing the armature to the field side or the opposite side of the field by energization;
One end of the field is provided, and an elastic member that biases the armature to the opposite side or the field side by an elastic force,
A buffer member provided between the field and the armature to reduce a collision sound generated at a collision surface of the armature with respect to the field;
A braking device comprising:
One of the armature and the field is formed with a guide portion protruding toward the collision surface, and the other armature or the field is inserted into the guide portion and cooperates with the guide portion to reciprocate the armature. A guide recess for guiding is formed,
Between the peripheral wall surface of the guide portion and the peripheral wall surface of the armature, there is provided a sealing member that forms a sealed space portion that seals the gas between the field and the armature,
With increasing temperature, the buffer member, reduced hardness, while the repulsive force generated by collision between the field and the armature is reduced, sealed the gas is adapted to repulsive force is increased ,
The armature is formed with a gas sealing hole and a gas discharging hole communicating with the sealed space portion, and the gas in the sealed space portion is replaced using the gas sealing hole and the gas discharging hole. It is like that.

According to the braking device of the present invention, when the armature collides with the field, the sum of the repulsive forces due to the gas in the buffer member and the sealed space is not easily affected by the ambient temperature, and a constant repulsive force is ensured. Therefore, it is possible to suppress an increase in impact sound due to the influence of temperature.
In addition, the gas in the sealed space together with the buffer member acts as a force for pushing the armature back to the opposite side of the field, so that the impact sound when the armature collides with the field is further suppressed.

It is a sectional side view which shows the braking device of the elevator hoisting machine of Embodiment 1 of this invention. It is the figure which the field and armature of the braking device of Drawing 1 separated. 3A is a front view of the field of FIG. 1, and FIG. 3B is a side sectional view of FIG. 4 (a) is a front view of the armature of FIG. 1, and FIG. 4 (b) is a side sectional view of FIG. 4 (a). FIG. 2 is a side sectional view of the braking device of FIG. 1 when braking. FIG. 2 is a side sectional view when the braking device of FIG. 1 is released from braking. It is a figure which shows the relationship between a braking stroke and a rubber repulsion force in the braking device of FIG. It is a figure which shows the relationship between the braking stroke and air repulsive force in the braking device of FIG. It is a figure which shows the relationship between the braking stroke and the total repulsive force in the braking device of FIG. It is a sectional side view which shows the modification of the braking device of FIG. It is a sectional side view which shows the braking device of Embodiment 2 of this invention. It is the figure which the field and armature of the braking device of Drawing 11 separated. FIG. 13A is a front view of the field of FIG. 11, and FIG. 13B is a side sectional view of FIG. 14 (a) is a front view of the armature of FIG. 11, and FIG. 14 (b) is a side sectional view of FIG. 14 (a). It is a sectional side view which shows the braking device of Embodiment 3 of this invention. It is the figure which the field and armature of the braking device of Drawing 15 separated. FIG. 17A is a front view of the field of FIG. 15, and FIG. 17B is a side sectional view of FIG. 18 (a) is a front view of the armature of FIG. 15, and FIG. 18 (b) is a side sectional view of FIG. 18 (a). FIG. 16 is a side sectional view of the braking device of FIG. 15 when braking. FIG. 16 is a side sectional view when the braking device of FIG. 15 is released from braking.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
1 is a side sectional view showing a braking device used in an elevator hoisting machine according to Embodiment 1 of the present invention, FIG. 2 is a diagram in which a field and an armature of the braking device in FIG. 1 are separated, and FIG. 1 is a front view of the field 1 of FIG. 1, FIG. 3B is a side sectional view of FIG. 3A, FIG. 4A is a front view of the armature 2 of FIG. 1, and FIG. FIG. 5 is a side sectional view when the braking device of FIG. 1 is braked, and FIG. 6 is a side sectional view when the braking device of FIG.
This braking device includes an armature 2 capable of reciprocating in a direction in which a shoe 14 attached to one surface is in contact with and away from the braking surface 15, and a field 1 provided to face the other surface of the armature 2. .
In the field 1, a guide recess 3 having a circular shape is formed on the central surface on the armature 2 side. An electromagnetic coil 4 for urging the armature 2 to the field 1 side by electromagnetic force generated by energization is provided on the bottom surface of the guide recess 3. A pair of spring storage portions 5 are formed inside the electromagnetic coil 4 in the guide recess 3. One end portion of a spring 6 that is an elastic member is connected to the bottom surface of the spring storage portion 5 and stored. The spring 6 always urges the armature 2 in the direction of separating from the field 1 by this elastic force.

  The armature 2 is formed with a cylindrical guide portion 12 to be inserted into the guide recess 3. A groove 16 extending over the entire circumference is formed on the peripheral wall surface of the guide portion 12. An O-ring 10 (sealing member) that forms a sealed space A that seals air, which is a gas between the field 1 and the armature 2, is attached to the groove 16. Around the guide portion 12, a plurality of rubber bonding portions 13 are formed at equal intervals along the circumferential direction. A cylindrical rubber 11 is bonded to each rubber bonding portion 13 as a buffer member that reduces a collision sound generated on a collision surface of the field 1 with the armature 2.

In the braking device having the above configuration, when the energization to the electromagnetic coil 4 is interrupted, the electromagnetic force generated in the electromagnetic coil 4 disappears, and the armature 2 moves away from the field 1 by the elastic force of the spring 6. The shoe 14 presses the braking surface 15 and exerts a braking force (see FIG. 5).
When the electromagnetic coil 4 is energized, the armature 2 is separated from the braking surface 15 against the elastic force of the spring 6 by the electromagnetic force generated in the electromagnetic coil 4, and the braking device releases the braking (see FIG. 6).
When this braking is released, the field 1 and the armature 2 collide with each other and an impact sound is generated.
At this time, the rubber 11 is compressed, and a repulsive force is generated to push the armature 2 back to the braking surface 15 side. Further, since the air in the sealed space A between the field 1 and the armature 2 is also sealed by the O-ring 10, it is compressed because there is no escape, and this air is also repelled in the same direction as the rubber 11. Will occur.
That is, when releasing the brake, the sum of the repulsive forces of the rubber 11 and air acts as a force to push the armature 2 back to the braking surface 15 side. The impact sound is suppressed.

7 is a relationship diagram between the repulsive force of the rubber 11 and the braking stroke, FIG. 8 is a relationship diagram between the braking stroke and the repulsive force of air in the sealed space A, and FIG. 9 is a braking stroke, the repulsive force of the rubber 11 and the air. The relationship diagram with the sum total of the repulsive force is shown.
As can be seen from FIG. 7, since the hardness of the rubber 11 becomes hard at a low temperature, the repulsive force increases. Conversely, the hardness decreases at a high temperature, and thus the repulsive force decreases.
On the other hand, as can be seen from FIG. 8, the repulsive force of the air in the sealed space A increases as the temperature rises, and thus the repulsive force of the rubber 11 increases at a high temperature and low at a low temperature. Become.
Then, by combining the rubber 11 and the air in the sealed space A, as can be seen from FIG. 9, the armature 2 is pushed back to the braking surface 15 side without being affected by the ambient temperature. An almost constant value is secured for the repulsive force.

According to the braking device of this embodiment, when the armature 2 collides with the field 1, the sum of the repulsive forces due to the air in the O-ring 10 and the sealed space A is hardly affected by the ambient temperature. A certain repulsive force is ensured, and it is possible to suppress an increase in impact sound due to the influence of temperature.
In addition, the air in the sealed space A together with the O-ring 10 acts as a force to push the armature 2 back to the opposite side of the field 1, so that the impact sound when the armature 2 collides with the field 1 is increased. More suppressed.

FIG. 10 shows a modification of the braking device of the first embodiment, and the armature 2 is formed with a gas sealing hole 20 and a gas discharge hole 21 communicating with the sealed space A. A plug 22 is fitted to the ends of the gas sealing hole 20 and the gas discharge hole 21.
In this example, when the repulsive force of the rubber 11 that decreases due to an increase in the environmental temperature cannot be supplemented only by the repulsive force of the air enclosed in the sealed space A, the molecular weight is higher than that of the air from the gas sealing hole 20. Another large gas is sealed, and the air accumulated in the sealed space is discharged from the gas discharge hole 21.
As a result, the inside of the sealed space A is replaced with a gas having a higher molecular weight than air, and it is possible to supplement the shortage of the decrease in the repulsive force of the rubber 11 due to the temperature rise.
For example, carbon dioxide may be used as a gas instead of air.

Embodiment 2. FIG.
11 is a side sectional view showing a braking device according to Embodiment 2 of the present invention, FIG. 12 is a diagram in which the field 1A and the armature 2A of the braking device in FIG. 11 are separated, and FIG. 13 (a) is the field 1A in FIG. 13 (b) is a side sectional view of FIG. 13 (a), FIG. 14 (a) is a front view of the armature 2A of FIG. 11, and FIG. 14 (b) is a side sectional view of FIG. 14 (a). It is.
In this braking device, a cylindrical guide portion 12A is formed at the center of the field 1A. The armature 2A is formed with a guide recess 3A into which the guide portion 12A is inserted.
Other configurations are the same as those of the braking device of the first embodiment.
Further, the operation and effect of the braking device of this embodiment is the same as that of the braking device of the first embodiment.

Embodiment 3 FIG.
15 is a side sectional view showing a braking device according to Embodiment 3 of the present invention, FIG. 16 is a diagram in which the field 1B and the armature 2B of the braking device in FIG. 15 are separated, and FIG. 17 (a) is the field 1B in FIG. 17 (b) is a side sectional view of FIG. 17 (a), FIG. 18 (a) is a front view of the armature 2B of FIG. 15, and FIG. 18 (b) is a side sectional view of FIG. 18 (a). 19 is a side sectional view when the braking device of FIG. 15 is braked, and FIG. 20 is a side sectional view when the braking device of FIG.
In this embodiment, the field 1B is provided with guide pins 30 which are inserted into a plurality of guide holes 31 formed in the armature 2B and guide the reciprocation of the armature 2B in cooperation with the guide holes 31. Yes.
Between the peripheral wall surface of the guide pin 30 and the peripheral wall surface of the guide hole 31, an O-ring 10A that forms a sealed space A that seals the air between the guide pin 30 and the armature 2B is provided. .
Other configurations are the same as those of the braking device of the first embodiment.
In the braking device according to this embodiment, the sealed space A sealed by the O-ring 10A, which is a sealing member, is formed at a plurality of locations, and the repulsive force required by the air is increased or decreased by increasing or decreasing the sealed space A. Can be adjusted more easily.
In the braking device of this embodiment, the repulsive force of the gas can be further increased by using a gas having a molecular weight larger than that of air.
Other functions and effects are the same as those of the braking device of the first embodiment.

In the braking device of each of the embodiments described above, the armatures 2, 2A, 2B are biased toward the fields 1, 1A, 1B by energization of the electromagnetic coil 4. On the contrary, the armatures are braked. A braking device that is biased toward the surface 15 may be used.
In the braking device in this case, the spring provided with one end portion in the field urges the armature to the field by its elastic force.
Moreover, although the rubber | gum 11 was used as a buffer member which hardness falls with a raise in temperature, of course, it is not limited to this.
The present invention can also be applied to devices other than braking devices used in elevator hoisting machines.

  1, 1A, 1B field, 2, 2A, 2B armature, 3, 3A guide recess, 4 electromagnetic coil, 5 spring storage, 6 spring, 10, 10A O-ring (sealing member), 11 rubber (buffer member), 12 Guide part, 13 Rubber bonding part, 14 Shoe, 15 Braking surface, 16, 16A Groove part, 20 Gas sealing hole, 21 Gas discharge hole, 31 Guide hole part, 32 Pin fitting hole part, A Sealed space part .

Claims (5)

An armature capable of reciprocating in a direction in which a shoe attached to one surface is in contact with or separated from the braking surface;
A field provided opposite to the other side of the armature;
An electromagnetic coil provided in the field and energizing the armature to the field side or the opposite side of the field by energization;
One end of the field is provided, and an elastic member that biases the armature to the opposite side or the field side by an elastic force,
A buffer member provided between the field and the armature to reduce a collision sound generated at a collision surface of the armature with respect to the field;
A braking device comprising:
One of the armature and the field is formed with a guide portion protruding toward the collision surface, and the other armature or the field is inserted into the guide portion and cooperates with the guide portion to reciprocate the armature. A guide recess for guiding is formed,
Between the peripheral wall surface of the guide portion and the peripheral wall surface of the armature, there is provided a sealing member that forms a sealed space portion that seals the gas between the field and the armature,
With increasing temperature, the buffer member, reduced hardness, while the repulsive force generated by collision between the field and the armature is reduced, sealed the gas is adapted to repulsive force is increased ,
The armature is formed with a gas sealing hole and a gas discharging hole communicating with the sealed space portion, and the gas in the sealed space portion is replaced using the gas sealing hole and the gas discharging hole. A braking device characterized by that. The braking device according to claim 1 , wherein the gas is air. The control device according to claim 1 , wherein the gas is a gas having a molecular weight larger than that of air. The braking device according to any one of claims 1 to 3 , wherein the buffer member is rubber. The braking device according to any one of claims 1 to 4 , wherein the braking device is a braking device used in an elevator hoisting machine.

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