Brake device and elevator traction machine

Abstract

The purpose of the present disclosure is to provide a brake device and an elevator traction machine capable of suppressing permanent deformation of cushion rubber due to long-term storage. In the storage state, the pair of position adjustment bolts (26) are displaced in a direction away from the pair of cushion rubbers (25) with respect to the movable iron core (22). As a result, at least a portion of each cushion rubber (25) is inserted into the corresponding position adjustment threaded hole (22b). At the moment, the tail end of each position adjusting bolt (26) is separated from the corresponding cushion rubber (25). Therefore, each cushion rubber (25) is not compressed.

Description

Technical Field

[0001] This disclosure relates to braking devices and elevator traction machines. Background Technology

[0002] In existing elevator traction mechanism brakes, a rubber buffer component is fixed to the surface of the electromagnet's magnetic core opposite to the movable core. The buffer component absorbs the impact generated when the movable core collides with the electromagnet (see, for example, Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2006-089162 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In existing traction machine brakes like those described above, if the buffer component is compressed for a prolonged period, it will undergo permanent deformation, a phenomenon known as fatigue. Therefore, the traction machine brake is configured such that, when braking force is generated when the elevator is at rest, the buffer component will not be compressed by the movable iron core.

[0008] However, in the manufacturing site of traction machine brakes, i.e., in the factory, since there are no braking objects such as brake drums, it is difficult to maintain the state where the movable iron core is separated from the electromagnet. The traction machine brake is stored with the movable iron core in contact with the electromagnet. Therefore, in traction machine brakes stored for a long time, the buffer components sometimes undergo permanent deformation, becoming unable to fully absorb the impact generated when the movable iron core collides with the electromagnet.

[0009] This disclosure was made to solve the aforementioned problems, and its purpose is to provide a braking device and an elevator traction machine that can suppress the permanent deformation of the cushioning rubber due to long-term storage.

[0010] Methods for solving problems

[0011] The braking device disclosed herein comprises: a fixed iron core having an attraction surface; a movable iron core capable of moving in a direction relative to or away from the attraction surface; a braking spring applying a force to the movable iron core in a direction away from the attraction surface; an electromagnetic coil disposed on the fixed iron core, generating a force that attracts the movable iron core toward the fixed iron core against the braking spring; and a buffer rubber absorbing the impact generated when the movable iron core collides with the fixed iron core. During storage, by tightening a fixing bolt disposed between the fixed iron core and the movable iron core, the braking spring is compressed, and the movable iron core and the attraction surface are... The storage state of contact is maintained. The buffer rubber is provided in the first iron core, which is either a fixed iron core or a movable iron core. A position adjustment threaded hole is provided in the second iron core, which is the other iron core, opposite to the buffer rubber. The position adjustment bolt is screwed into the position adjustment threaded hole. When the braking force is released in the use state, the end of the position adjustment bolt abuts against the buffer rubber. In the storage state, the position adjustment bolt is moved away from the buffer rubber relative to the second iron core, so that at least a part of the buffer rubber is inserted into the position adjustment threaded hole.

[0012] Furthermore, the braking device disclosed herein comprises: a fixed iron core having an attraction surface; a movable iron core capable of moving towards or away from the attraction surface; a braking spring applying a force to the movable iron core in a direction away from the attraction surface; an electromagnetic coil disposed on the fixed iron core, generating a force that attracts the movable iron core towards the fixed iron core by overcoming the braking spring; and a buffer rubber absorbing the impact generated when the movable iron core collides with the fixed iron core. During storage, by screwing in a fixing bolt disposed between the fixed iron core and the movable iron core, the braking spring is compressed, maintaining the storage state where the movable iron core abuts against the attraction surface. This serves as a buffer between the fixed iron core and the fixed iron core. The first core of either of the movable iron cores is provided with a fixing threaded hole for the fixing bolt to be screwed in and a receiving hole. The second iron core, which is the other of the fixed iron core and the movable iron core, is provided with a through hole for the fixing bolt to pass through. A support member is housed in the receiving hole. A cushioning rubber is supported on the support member. It can move together with the support member between the used position between the fixed iron core and the movable iron core and the non-used position not between the fixed iron core and the movable iron core. An auxiliary spring is provided in the receiving hole to move the cushioning rubber from the non-used position to the used position. In the storage state, the support member is pressed by the fixing bolt, and the cushioning rubber moves to the non-used position.

[0013] Invention Effects

[0014] According to this disclosure, it is possible to suppress permanent deformation of the cushioning rubber due to long-term storage of the braking device. Attached Figure Description

[0015] Figure 1 This is a schematic structural diagram of the elevator device according to Embodiment 1.

[0016] Figure 2 It is a schematic representation of the setting at Figure 1 A cross-sectional view of the main part of the braking device of the traction machine body.

[0017] Figure 3 It means Figure 2 A cross-sectional view of the storage condition of the braking device.

[0018] Figure 4 It means Figure 3 Front view of the braking device.

[0019] Figure 5 This is a schematic cross-sectional view showing the main parts of the braking device in Embodiment 2.

[0020] Figure 6 It means Figure 5 A cross-sectional view of the storage condition of the braking device.

[0021] Figure 7 It means Figure 6 Front view of the braking device.

[0022] Label Explanation

[0023] 13: Elevator traction machine; 20, 30: Braking device; 21, 31: Fixed iron core; 21a, 31a: Suction surface; 31b: Fixed threaded hole; 22, 32: Movable iron core; 32a: Through hole; 22b: Position adjustment threaded hole; 23, 33: Braking spring; 24, 34: Electromagnetic coil; 25, 35: Buffer rubber; 26: Position adjustment bolt; 27, 38: Fixing bolt; 36: Support component; 37: Auxiliary spring. Detailed Implementation

[0024] The embodiments will now be described with reference to the accompanying drawings.

[0025] Implementation method 1.

[0026] Figure 1 This is a schematic structural diagram of the elevator device according to Embodiment 1. In the figure, a support beam 12 is provided at the top of the shaft 11. An elevator traction machine 13 is supported on the support beam 12. The elevator traction machine 13 has a traction machine body 14 and a drive sheave 15.

[0027] A suspension body 16 is wound around the drive pulley 15. Multiple ropes or multiple belts are used as the suspension body 16.

[0028] The car 17 and counterweight 18 are suspended in the hoistway 11 by the suspension body 16. In addition, the car 17 and counterweight 18 are raised and lowered in the hoistway 11 by rotating the drive sheave 15.

[0029] A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed inside the hoistway 11. The pair of car guide rails guide the raising and lowering of the car 17. The pair of counterweight guide rails guide the raising and lowering of the counterweight 18.

[0030] Figure 2 It is a schematic representation of the setting at Figure 1 A cross-sectional view of the main parts of the braking device of the traction machine body 14. The traction machine body 14 has a traction machine motor (not shown), a brake rotating body (not shown), and a braking device 20.

[0031] The traction machine motor rotates the drive sheave 15. A braking rotating body rotates integrally with the drive sheave 15. This braking rotating body may be, for example, a brake drum. The braking device 20 keeps the drive sheave 15 stationary. Furthermore, the braking device 20 brakes the rotation of the drive sheave 15.

[0032] The braking device 20 has a fixed iron core 21, a movable iron core 22, a brake shoe (not shown), a brake pad (not shown), a pair of brake springs 23, an electromagnetic coil 24, a pair of buffer rubbers 25, and a pair of position adjusting bolts 26.

[0033] The fixed iron core 21 has an attractive surface 21a. A fixed threaded hole 21b is provided in the center of the fixed iron core 21.

[0034] The movable iron core 22 is opposite to the attraction surface 21a. In addition, the movable iron core 22 can be moved toward or away from the attraction surface 21a.

[0035] The movable iron core 22 is provided with a through hole 22a and a pair of position adjustment threaded holes 22b. That is, the second iron core in Embodiment 1 is a movable iron core 22. The through hole 22a is located on the extension line of the fixed threaded hole 21b.

[0036] The brake shoe is located on the side of the movable iron core 22 opposite to the fixed iron core 21. The brake pad is located on the side of the brake shoe opposite to the movable iron core 22. The brake shoe and brake pad are displaced in the same direction as the movable iron core 22 by the displacement of the movable iron core 22.

[0037] A pair of brake springs 23 are disposed between the fixed iron core 21 and the movable iron core 22. Furthermore, the pair of brake springs 23 apply a force to the movable iron core 22 in a direction away from the attraction surface 21a. The brake pads are pressed against the brake rotating body via the pair of brake springs 23, the movable iron core 22, and the brake shoe. This applies a braking force to the drive pulley 15. Figure 2 This indicates the state of braking force application of the braking device 20.

[0038] An electromagnetic coil 24 is disposed on a fixed iron core 21. Furthermore, the electromagnetic coil 24 is embedded in the fixed iron core 21. When energized, the electromagnetic coil 24 generates a force that overcomes a pair of brake springs 23, attracting the movable iron core 22 towards the fixed iron core 21. By attracting the movable iron core 22 towards the fixed iron core 21, the brake pads are pulled away from the brake rotating body, and the braking force on the drive pulley 15 is released.

[0039] A pair of buffer rubbers 25 are disposed on the attraction surface 21a. That is, the first iron core in Embodiment 1 is a fixed iron core 21. In addition, the pair of buffer rubbers 25 protrude from the attraction surface 21a toward the movable iron core 22. Furthermore, the pair of buffer rubbers 25 absorb the impact generated when the movable iron core 22 collides with the fixed iron core 21.

[0040] A pair of position adjustment bolts 26 are screwed into a pair of position adjustment threaded holes b from the side of the movable iron core 22 opposite to the fixed iron core 21.

[0041] A pair of position adjustment threaded holes 22b are respectively provided on the movable iron core 22 at positions opposite to a pair of buffer rubbers 25. When the braking force is released in the state of the braking device 20, that is, when the movable iron core 22 is attracted to the fixed iron core 21, the ends of a pair of position adjustment bolts 26 respectively abut against a pair of buffer rubbers 25.

[0042] Figure 3 It means Figure 2 A cross-sectional view of the brake device 20 in its storage condition. Figure 4 It means Figure 3 The front view of the braking device 20. When storing the braking device 20, a fixing bolt 27 is provided between the fixed iron core 21 and the movable iron core 22. Then, by tightening the fixing bolt 27, the device is maintained... Figure 3 The storage status is shown.

[0043] The storage state is such that a pair of braking springs 23 are compressed respectively, and the movable iron core 22 abuts against the attraction surface 21a. The fixing bolt 27 passes through the through hole 22a from the side opposite to the fixing iron core 21 and is screwed into the fixing threaded hole 21b.

[0044] As the fixing bolt 27, the brake release bolt can be used. The brake release bolt is a bolt used to mechanically release the braking force by moving the movable iron core 22 toward the fixed iron core 21 during maintenance work such as replacing the brake pads of the elevator traction machine 13.

[0045] Furthermore, in the stored state, a pair of position adjusting bolts 26 are displaced relative to the movable iron core 22 in a direction away from the pair of cushioning rubbers 25. As a result, at least a portion of each cushioning rubber 25 is inserted into the corresponding position adjusting threaded hole 22b. At this time, the end of each position adjusting bolt 26 separates from the corresponding cushioning rubber 25. Therefore, each cushioning rubber 25 is not compressed.

[0046] In such a braking device 20, even when the movable iron core 22 is kept in contact with the fixed iron core 21 during storage, the pair of buffer rubbers 25 remain uncompressed. Therefore, it is possible to prevent the pair of buffer rubbers 25 from undergoing permanent deformation due to long-term storage.

[0047] Therefore, in the elevator traction machine 13, the noise generated by the collision between the movable iron core 22 and the fixed iron core 21 can be suppressed stably over a long period of time. As a result, the workload of maintenance work can be reduced.

[0048] In addition, when using the braking device 20, it is easy to adjust the pair of position adjusting bolts 26 to abut against the pair of buffer rubbers 25 by simply tightening a pair of position adjusting bolts 26.

[0049] Furthermore, when the braking device 20 is in its stored state, as long as no compressive force that would cause permanent deformation is applied to the pair of buffer rubbers 25, the pair of position adjusting bolts 26 can also contact the pair of buffer rubbers 25 respectively.

[0050] Alternatively, the first iron core can be a movable iron core 22, and the second iron core can be a fixed iron core 21. In this case, a pair of buffer rubbers 25 are provided on the movable iron core 22, and a pair of position adjustment threaded holes are provided on the fixed iron core 21.

[0051] In addition, the number of buffer rubbers 25 and the number of position adjusting bolts 26 are not limited to two, and can be one or more.

[0052] Implementation method 2.

[0053] then, Figure 5 This is a schematic cross-sectional view showing the main parts of the braking device in Embodiment 2. The traction machine body 14 of Embodiment 2 has a braking device 30 instead of the braking device 20 of Embodiment 1. Other structures in the elevator system of Embodiment 2 are the same as those in Embodiment 1.

[0054] The braking device 30 has a fixed iron core 31, a movable iron core 32, a brake shoe (not shown), a brake pad (not shown), a pair of brake springs 33, an electromagnetic coil 34, a pair of buffer rubbers 35, a pair of flat support members 36, and a pair of auxiliary springs 37.

[0055] The fixed iron core 31 has an attractive surface 31a. A pair of fixed threaded holes 31b and a pair of receiving holes 31c are provided on the fixed iron core 31. That is, the first iron core of Embodiment 2 is the fixed iron core 31.

[0056] The movable iron core 32 is opposite to the attraction surface 31a. In addition, the movable iron core 32 can be moved toward or away from the attraction surface 31a.

[0057] A pair of through holes 32a are provided in the movable iron core 32. That is, the second iron core in Embodiment 2 is the movable iron core 22. The pair of through holes 32a are respectively located on the extension lines of the fixed threaded holes 31b.

[0058] The brake shoe is located on the side of the movable iron core 32 opposite to the fixed iron core 31. The brake pad is located on the side of the brake shoe opposite to the movable iron core 32. The brake shoe and brake pad are displaced in the same direction as the movable iron core 32 by the displacement of the movable iron core 32.

[0059] A pair of brake springs 33 are disposed between the fixed iron core 31 and the movable iron core 32. Furthermore, the pair of brake springs 33 apply a force to the movable iron core 32 in a direction away from the attraction surface 31a. The brake pads are pressed against the brake rotating body via the pair of brake springs 33, the movable iron core 32, and the brake shoe. This applies a braking force to the drive pulley 15. Figure 5 This indicates the state of braking force application of the braking device 30.

[0060] An electromagnetic coil 34 is disposed on a fixed iron core 31. Furthermore, the electromagnetic coil 34 is embedded in the fixed iron core 31. When energized, the electromagnetic coil 34 generates a force that overcomes a pair of brake springs 33, attracting the movable iron core 32 towards the fixed iron core 31. By attracting the movable iron core 32 towards the fixed iron core 31, the brake pads are pulled away from the brake rotating body, and the braking force on the drive pulley 15 is released.

[0061] A pair of support members 36 and a pair of auxiliary springs 37 are respectively housed in a pair of receiving holes 31c. A pair of cushioning rubbers 35 are respectively supported by a pair of support members 36.

[0062] Additionally, a pair of cushioning rubbers 35 can be displaced together with a pair of support members 36 between the used position and the non-used position. For example... Figure 5 As shown, the "use position" is the position where each buffer rubber 35 protrudes from the attraction surface 31a, and the position where each buffer rubber 35 is between the fixed iron core 31 and the movable iron core 32. The "non-use position" is the position where each buffer rubber 35 does not protrude from the attraction surface 31a, and the position where each buffer rubber 35 is not between the fixed iron core 31 and the movable iron core 32.

[0063] When in the use position, each buffer rubber 35 absorbs the impact generated when the movable iron core 32 collides with the fixed iron core 31. A pair of auxiliary springs 37 apply a force to each pair of buffer rubbers 35 via a pair of support members 36, causing them to shift from the non-use position to the use position.

[0064] Figure 6 It means Figure 5 A cross-sectional view of the brake device 30 in its storage condition. Figure 7 It means Figure 6 The front view of the braking device 30. When storing the braking device 30, a pair of fixing bolts 38 are provided between the fixed iron core 31 and the movable iron core 32. Then, by tightening the pair of fixing bolts 38, the device is maintained... Figure 6 The storage status is shown.

[0065] In the storage state, the pair of brake springs 33 are compressed, and the movable iron core 32 abuts against the attraction surface 31a. Each fixing bolt 38 passes through the through hole 32a from the side opposite to the fixing iron core 31 and is screwed into the fixing threaded hole 31b. As in Embodiment 1, the brake release bolt can be used as each fixing bolt 38.

[0066] Furthermore, in the storage state, a pair of support members 36 are pressed down by a pair of fixing bolts 38, and a pair of cushioning rubbers 35 are displaced to a non-use position. Each cushioning rubber 35 is separated from the movable iron core 22 when in the non-use position. Therefore, each cushioning rubber 35 is not compressed.

[0067] By removing a pair of fixing bolts 38 from the fixing core 31, a pair of buffer rubbers 35 are moved to the use position via a pair of auxiliary springs 37.

[0068] In such a braking device 30, even when the movable iron core 32 is kept in contact with the fixed iron core 31 during storage, the pair of buffer rubbers 35 remain uncompressed. Therefore, it is possible to prevent the pair of buffer rubbers 35 from undergoing permanent deformation due to long-term storage.

[0069] Therefore, in the elevator traction machine 13, the noise generated by the collision between the movable iron core 32 and the fixed iron core 31 can be suppressed stably over a long period of time. As a result, the workload of maintenance work can be reduced.

[0070] In addition, when using the braking device 30, a pair of buffer rubbers 35 can be moved to the use position simply by removing a pair of fixing bolts 38 from the fixed iron core 31 and the movable iron core 32.

[0071] Furthermore, when the braking device 30 is in its stored state, as long as no compressive force that would cause permanent deformation is applied to the pair of buffer rubbers 35, the pair of movable iron cores 32 can also contact the pair of buffer rubbers 35.

[0072] Alternatively, the first iron core can be a movable iron core 32, and the second iron core can be a fixed iron core 31. In this case, a pair of cushioning rubbers 35, a pair of support members 36, and a pair of auxiliary springs 37 are provided on the movable iron core 32.

[0073] In addition, the number of cushioning rubber 35, support component 36, auxiliary spring 37 and fixing bolt 38 is not limited to two, and can be one or more.

[0074] Furthermore, in embodiments 1 and 2, the overall layout of the elevator system is not limited to... Figure 1 The layout. For example, the rope winding method can also be a 1:1 rope winding method.

[0075] In addition, in embodiments 1 and 2, the elevator device can also be a machine-room-less elevator, a double-decker elevator, or a single-shaft multi-car elevator device. The single-shaft multi-car method is a method in which the upper car and the lower car, located directly below the upper car, rise and fall independently in a common shaft.

[0076] In addition, the braking device 20 of Embodiment 1 and the braking device 30 of Embodiment 2 can also be installed in equipment other than the elevator traction machine 13.

Claims

1. A braking device comprising: A fixed iron core, which has an attractive surface; A movable iron core, which can be moved toward or away from the attraction surface; A braking spring that applies a force to the movable iron core in a direction away from the attraction surface; An electromagnetic coil, disposed on the fixed iron core, generates a force that overcomes the braking spring and attracts the movable iron core toward the fixed iron core. as well as The cushioning rubber absorbs the impact generated when the movable iron core collides with the fixed iron core. During storage, the fixing bolts located between the fixed iron core and the movable iron core are tightened, thereby maintaining the storage state in which the brake spring is compressed and the movable iron core abuts against the attraction surface. The cushioning rubber is disposed on the first iron core, which is either the fixed iron core or the movable iron core. A position adjustment threaded hole is provided at the position opposite to the buffer rubber on the second iron core, which is the other of the fixed iron core and the movable iron core. A position adjustment bolt is screwed into the position adjustment threaded hole. When the braking force is released during use, the end of the position adjusting bolt abuts against the buffer rubber. In the storage state, the position adjusting bolt is moved away from the first iron core in a direction away from the cushioning rubber, thereby inserting at least a portion of the cushioning rubber into the position adjusting threaded hole.

2. A braking device comprising: A fixed iron core, which has an attractive surface; A movable iron core, which can be moved toward or away from the attraction surface; A braking spring that applies a force to the movable iron core in a direction away from the attraction surface; An electromagnetic coil, disposed on the fixed iron core, generates a force that overcomes the braking spring and attracts the movable iron core toward the fixed iron core. as well as The cushioning rubber absorbs the impact generated when the movable iron core collides with the fixed iron core. During storage, the fixing bolts located between the fixed iron core and the movable iron core are tightened, thereby maintaining the storage state in which the brake spring is compressed and the movable iron core abuts against the attraction surface. The first iron core, which is either the fixed iron core or the movable iron core, is provided with a receiving hole and a fixing threaded hole for the fixing bolt to be screwed in. A through hole is provided on the second iron core, which is the other of the fixed iron core and the movable iron core, for the fixing bolt to pass through. A support component is housed in the receiving hole. The cushioning rubber is supported by the support member and can move together with the support member between a used position between the fixed iron core and the movable iron core and a non-used position not between the fixed iron core and the movable iron core. An auxiliary spring is provided in the storage hole to shift the cushioning rubber from the non-use position to the use position. In the storage state, the support component is pressed down by the fixing bolt, and the cushioning rubber is moved to a non-use position.

3. An elevator traction machine comprising the braking device as described in claim 1 or 2.

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