Electromagnetic brake mechanism for an elevator hoisting machine

Abstract

The utility model relates to an electromagnetic brake mechanism of elevator hoisting machine, including hoisting machine subassembly, the rotation axis of hoisting machine subassembly is connected with the brake disc, hoisting machine subassembly is connected with the fixed disc, still include adjusting mechanism and alarm mechanism, adjusting mechanism includes driving gear, driven gear and internal thread cylinder, internal thread cylinder is connected with screw rod thread, driven gear is arranged in the outside of internal thread cylinder and slides, driving gear is located on the pressing plate and is engaged with driven gear, alarm mechanism includes siren, power, shell, electrode block, upper electrode, guide block and half ring pole piece, the shell is connected with driven gear, power and alarm lamp are established on the shell, guide block is connected on the surface of internal thread cylinder, upper electrode is connected in one end of guide block, is connected through half ring pole piece between upper electrode, the inside of driven gear is opened to have the slide groove, and electrode block is established in the inside of slide groove, the utility model discloses realize timely notice maintenance personnel's function of adjusting the gap and the function of accurate adjustment gap value.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, specifically to an electromagnetic braking mechanism for an elevator traction machine. Background Technology

[0002] The electromagnetic brake of the traction machine is a key component used for safe braking in equipment such as elevators and cranes. Its working principle and performance directly affect the safety and reliability of the equipment.

[0003] Chinese Patent No. CN219082132U discloses an electromagnetic braking mechanism for an elevator traction machine. By setting up a fixed plate, friction plates, elastic elements, threaded rods, pressure plates, locking nuts, external gear discs, and a drive gear, the drive gear can be rotated to drive the three external gear discs to rotate synchronously, thereby synchronously pushing the pressure plate to move along the threaded rod. This effectively ensures the uniformity of the initial gap between the two friction plates and improves the reliability of the mechanism.

[0004] However, the existing technology has the following drawbacks: the gap between the brake shoe and the brake disc is generally 0.3-0.5mm and needs to be adjusted regularly. The existing technology can only ensure the uniformity of the adjustment when adjusting the gap, and cannot determine whether the adjusted gap is within a reasonable range. In addition, when the gap between the brake shoe and the brake disc exceeds the normal range after long-term use, maintenance personnel cannot know it in time, which poses a certain safety hazard. Utility Model Content

[0005] The purpose of this utility model is to address the problems existing in the background technology by proposing an electromagnetic braking mechanism for an elevator traction machine.

[0006] The technical solution of this utility model: An electromagnetic braking mechanism for an elevator traction machine, comprising a traction machine assembly, a brake disc connected to the rotating shaft of the traction machine assembly, and a fixed disc connected to the traction machine assembly; further comprising:

[0007] The electromagnetic attraction mechanism includes an electromagnetic coil, a pressure plate, brake shoes, a spring assembly, and a screw. The pressure plate faces the fixed plate and has multiple circumferentially distributed circular openings. The fixed plate has multiple circumferentially distributed moving slots on its side facing the pressure plate. The spring assembly is located in the moving slots and connected to the screw. The screw passes through the circular openings. A nut block is threadedly connected to the screw. The electromagnetic coil is located inside the traction machine assembly for magnetically attracting the pressure plate.

[0008] The adjusting mechanism includes a driving gear, a driven gear, and an internal threaded cylinder, with the internal threaded cylinder threadedly connected to the screw; the driven gear is slidably disposed on the outside of the internal threaded cylinder; the driving gear is disposed on the pressure plate and meshes with the driven gear.

[0009] An alarm mechanism includes an alarm, a power supply, a housing, an electrode block, an upper electrode, a guide block, and a semi-annular electrode plate. The housing is connected to a driven gear. The power supply and an alarm light are located on the housing. Two guide blocks are provided and connected to the surface of an internally threaded cylinder. The upper electrode is connected to one end of the guide block. The semi-annular electrode plate is located inside the internally threaded cylinder. The upper electrodes are connected to each other through the semi-annular electrode plate. The driven gear has a groove inside that matches the guide block and the upper electrode, and the electrode block is located inside the groove.

[0010] Preferably, the spring assembly includes a slider and a spring; the slider is slidably disposed inside the moving groove; the two ends of the spring are respectively connected to the pressure plate and the inner wall of the moving groove; the slider is connected to one end of the screw.

[0011] Preferably, a handle is connected to the drive gear; aligned air holes are opened inside the pressure plate, drive gear and handle; and several grooves are provided on the surface of the brake disc and brake shoe.

[0012] Preferably, the outer surface of the housing is rotatably provided with an adapter ring; the adapter ring is detachably connected to the fixed plate via a connecting arm; the handle is connected to the adapter ring via a connecting rod.

[0013] Preferably, the connecting arm is provided with a scale; a pointer pointing to the scale is connected to the pressure plate.

[0014] Preferably, the electrode block, power supply, and alarm are connected in series via wires.

[0015] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0016] By incorporating an adjustment mechanism and an alarm mechanism, when wear occurs on the brake shoes and brake disc, the increased movement distance of the brake shoes causes the upper motor to contact the electrode block, thereby powering the alarm to promptly notify maintenance personnel to adjust the clearance.

[0017] The system features a connecting arm and a pointer. The connecting arm has a scale. When the pointer points to the 0 mark, the gap between the new brake shoe and the brake disc is within the normal range. When the brake shoe and brake disc wear down, pressing the pressure plate causes the worn brake shoe to contact the brake disc. The pointer then records the mark at this point, which is the distance value that needs to be adjusted. This system enables precise adjustment of the gap value and improves adjustment efficiency. Attached Figure Description

[0018] Figure 1 This is a perspective view of one embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the connection structure between the fixed disk, the adjustment mechanism, and the alarm mechanism in one embodiment of the present invention.

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0021] Figure 4 This is a schematic diagram of the structure of the fixed plate in a state where the adjustment mechanism and alarm mechanism are separated in one embodiment of the present invention.

[0022] Figure 5 for Figure 4 Enlarged structural diagram at point B.

[0023] Figure 6 This is a schematic diagram of the structure of the pressure plate and the adjustment mechanism separated in one embodiment of the present invention.

[0024] Figure 7 This is a cross-sectional structural diagram of an internally threaded cylinder in one embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the driven gear in the electrode block separated state in one embodiment of the present invention.

[0026] Reference numerals: 1. Traction machine assembly; 2. Fixed plate; 201. Moving groove; 3. Pressure plate; 4. Handle; 5. Adapter ring; 6. Drive gear; 7. Alarm; 8. Driven gear; 801. Slide groove; 9. Connecting arm; 10. Housing; 11. Power supply; 12. Screw; 13. Internal threaded cylinder; 14. Upper electrode; 15. Brake disc; 16. Slider; 17. Pointer; 18. Spring; 19. Brake shoe; 20. Nut block; 21. Electrode block; 22. Guide block; 23. Semi-ring electrode plate. Detailed Implementation

[0027] Example 1

[0028] like Figure 1-8 As shown, the present invention proposes an electromagnetic braking mechanism for an elevator traction machine, including a traction machine assembly 1, a brake disc 15 connected to the rotating shaft of the traction machine assembly 1, a fixed disc 2 connected to the traction machine assembly 1, a hole provided in the fixed disc 2, and the rotating shaft passing through the hole; it also includes an electromagnetic attraction mechanism, an adjustment mechanism and an alarm mechanism.

[0029] The electromagnetic attraction mechanism includes an electromagnetic coil, a pressure plate 3, a brake shoe 19, a spring assembly, and a screw 12. The pressure plate 3 faces the fixed plate 2 and has multiple circumferentially distributed circular openings. The fixed plate 2 has multiple circumferentially distributed moving slots 201 on its side facing the pressure plate 3. The spring assembly is located in the moving slots 201 and connected to the screw 12. The screw 12 passes through the circular openings. The nut block 20 is threadedly connected to the screw 12. The electromagnetic coil is located inside the traction machine assembly 1 and is used to magnetically attract the pressure plate 3.

[0030] It should be noted that after the electromagnetic coil is energized, it generates magnetism and magnetically attracts the pressure plate 3. The pressure plate 3 drives the brake shoe 19 toward the brake disc 15 and makes close contact with the brake disc 15. Under the action of friction between the brake shoe 19 and the brake disc 15, the braking function of the traction machine assembly 1 is realized. After the electromagnetic coil is de-energized, it loses its magnetism. Under the action of the elastic force of the spring assembly, the pressure plate 3 drives the brake shoe 19 to reset and move away from the brake disc 15.

[0031] The adjusting mechanism includes a driving gear 6, a driven gear 8, and an internal threaded cylinder 13. The internal threaded cylinder 13 is threadedly connected to the screw 12. The driven gear 8 is slidably disposed on the outside of the internal threaded cylinder 13. The driving gear 6 is disposed on the pressure plate 3 and meshes with the driven gear 8.

[0032] It should be noted that the nut block 20 is first rotated away from the pressure plate 3; the drive gear 6 is rotated to drive the driven gears 8 to rotate in a synchronous manner, and the driven gears 8 drive the internal threaded cylinder 13 to rotate; so that the internal threaded cylinder 13 moves along the screw 12, thereby pushing the pressure plate 3 to move, so as to achieve the function of uniformly adjusting the gap between the brake shoe 19 and the brake disc 15.

[0033] It is worth noting that the nut block 20 and the internal threaded cylinder 13 perform the clamping function of the pressure plate 3, so that the movement of the pressure plate 3 can drive the screw 12 to move, and in turn drive the internal threaded cylinder 13 to move.

[0034] The alarm mechanism includes an alarm 7, a power supply 11, a housing 10, an electrode block 21, an upper electrode 14, a guide block 22, and a semi-annular electrode 23. The housing 10 is connected to the driven gear 8. The power supply 11 and the alarm light are located on the housing 10. Two guide blocks 22 are provided and connected to the surface of the internal threaded cylinder 13. The upper electrode 14 is connected to one end of the guide block 22. The semi-annular electrode 23 is located inside the internal threaded cylinder 13. The upper electrodes 14 are connected to each other through the semi-annular electrode 23. The driven gear 8 has a groove 801 inside that is adapted to the guide block 22 and the upper electrode 14. The electrode block 21 is located inside the groove 801. The electrode block 21, the power supply 11, and the alarm 7 are connected in series by wires.

[0035] It is worth noting that the guide block 22 is made of insulating material; when the electrode block 21 contacts the guide block 22, it indicates that the gap between the brake shoe 19 and the brake disc 15 is within the normal range (0.3-0.5mm).

[0036] It should be noted that when the brake shoe 19 is worn after long-term use, or when the brake disc 15 is worn, the brake shoe 19 or brake disc 15 becomes thinner, resulting in a significant increase in the gap between them. At this time, the distance that the pressure plate 3 moves to contact the brake disc 15 increases significantly, which in turn increases the moving distance of the internal threaded cylinder 13. This causes the upper electrode 14 on the internal threaded cylinder 13 to contact the electrode block 21 in the groove of the driven gear 8. At this time, the circuit of the electrode block 21, the power supply 11 and the alarm 7 is connected, and the power supply 11 can supply power to the alarm 7. At this time, the alarm 7 will sound an alarm to notify the maintenance personnel, so that the maintenance personnel can adjust the gap between the brake shoe 19 and the brake disc 15 in time and reduce safety hazards.

[0037] Example 2

[0038] like Figure 4 As shown, the present invention proposes an electromagnetic braking mechanism for an elevator traction machine. Compared with Embodiment 1, this embodiment also includes a detailed description of the structure of the spring assembly. The spring assembly includes a slider 16 and a spring 18. The slider 16 is slidably disposed inside the moving groove 201. The two ends of the spring 18 are respectively connected to the pressure plate 3 and the inner wall of the moving groove 201. The slider 16 is connected to one end of the screw 12.

[0039] It should be noted that when the electromagnetic coil is energized, it will magnetically attract the pressure plate 3. The pressure plate 3 will drive the nut block 20 and the internal threaded cylinder 13 to move, which in turn will drive the screw 12 to move. The movement of the screw 12 will compress the spring 18. When the electromagnetic coil is de-energized, the magnetic force disappears. Under the action of the spring 18, the screw 12 will reset. The screw 12 will drive the internal threaded cylinder 13 and the pressure plate 3 to reset. The pressure plate 3 will drive the brake shoe 19 to reset.

[0040] Example 3

[0041] like Figure 1-5 As shown, the electromagnetic braking mechanism of the elevator traction machine proposed in this utility model, compared with Embodiment 2, further includes a handle 4 connected to the drive gear 6; aligned air holes are opened inside the pressure plate 3, drive gear 6 and handle 4; the surfaces of brake disc 15 and brake shoe 19 are provided with several grooves; a transition ring 5 is rotatably provided on the outer surface of the outer shell 10; the transition ring 5 is detachably connected to the fixed plate 2 through the connecting arm 9; the handle 4 is connected to the transition ring 5 through the connecting rod; the connecting arm 9 is provided with a scale; and a pointer 17 pointing to the scale is connected to the pressure plate 3.

[0042] It should be noted that the vent design increases the airflow velocity at the gap, helping to dissipate heat from the brake disc 15 and brake shoe 19; the groove design increases the heat dissipation area of ​​the brake disc 15 and brake shoe 19, and also increases the friction between the brake disc 15 and brake shoe 19; the debris generated by the friction between the brake disc 15 and brake shoe 19 easily accumulates in the groove, and the airflow can blow away the debris in the groove; the connecting arm 9 is detachably connected to the fixed plate 2, which facilitates the replacement and maintenance of the adjustment mechanism; the pointer 17, in conjunction with the scale, helps maintenance personnel quickly adjust the gap between the brake disc 15 and brake shoe 19 to the normal range.

[0043] It is worth noting that when adjusting the gap between the new brake shoe 19 and the brake disc 15, the pointer 17 should be pointed to the 0 mark on the scale. At this time, the gap between the brake shoe 19 and the brake disc 15 is between 0.3-0.5mm. When the brake shoe 19 and the brake disc 15 are worn, the gap value will be greater than 0.5mm. Press the pressure plate 3 to make the worn brake shoe 19 contact the brake disc 15, and record the mark pointed to by the pointer 17 at this time. This mark value is the distance value that needs to be adjusted.

[0044] In summary, when this utility model is used, after long-term use, if the brake shoe 19 or the brake disc 15 wears down, the brake shoe 19 or the brake disc 15 will become thinner, resulting in a significant increase in the gap between them. At this time, when the pressure plate 3 drives the brake shoe 19 to contact the brake disc 15, the distance it moves will increase significantly, which in turn will increase the distance the internal threaded cylinder 13 moves significantly. This will cause the upper electrode 14 on the internal threaded cylinder 13 to contact the electrode block 21 in the groove of the driven gear 8. At this time, the circuit of the electrode block 21, the power supply 11 and the alarm 7 will be connected, and the power supply 11 can supply power to the alarm 7. At this time, the alarm 7 will sound an alarm to notify the maintenance personnel, so that the maintenance personnel can adjust the gap between the brake shoe 19 and the brake disc 15 in time and reduce safety hazards.

[0045] By pressing down on the pressure plate 3 to make the worn brake shoe 19 contact the brake disc 15, the mark pointed to by the pointer 17 at this time is recorded; this mark value is the distance value that needs to be adjusted. Then, release the pressure plate 3 to reset it, and rotate the nut block 20 away from the pressure plate 3 to give the pressure plate 3 some room to move. The maintenance personnel then rotate the drive gear 6 clockwise using the handle 4 (refer to...). Figure 1 The driving gear 6 synchronously drives the driven gears 8 to rotate counterclockwise, and the driven gears 8 drive the internal threaded cylinder 13 to rotate; causing the internal threaded cylinder 13 to move along the screw 12, which in turn pushes the pressure plate 3 to move. The pressure plate 3 drives the brake shoe 19 to move evenly closer to the brake disc 15. When the pointer 17 reaches the recorded scale value, the handle 4 is stopped from rotating, thus realizing the function of accurately adjusting the gap value and improving the adjustment efficiency.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An electromagnetic brake mechanism of an elevator hoisting machine, comprising a hoisting machine assembly (1), a brake disc (15) connected to a rotating shaft of the hoisting machine assembly (1), a fixed disc (2) connected to the hoisting machine assembly (1); characterized in that, Also includes: The electromagnetic attraction mechanism includes an electromagnetic coil, a pressure plate (3), a brake shoe (19), a spring assembly, and a screw (12); the pressure plate (3) is positioned facing the fixed plate (2), and multiple circular openings are provided on the pressure plate (3); multiple circular moving slots (201) are provided on the side of the fixed plate (2) facing the pressure plate (3); the spring assembly is located in the moving slots (201) and connected to the screw (12); the screw (12) is provided through the circular openings; the nut block (20) is threadedly connected to the screw (12); the electromagnetic coil is located inside the traction machine assembly (1) for magnetically attracting the pressure plate (3); The adjusting mechanism includes a driving gear (6), a driven gear (8), and an internal threaded cylinder (13). The internal threaded cylinder (13) is threadedly connected to the screw (12). The driven gear (8) is slidably disposed on the outside of the internal threaded cylinder (13). The driving gear (6) is disposed on the pressure plate (3) and meshes with the driven gear (8). An alarm mechanism includes an alarm (7), a power supply (11), a housing (10), an electrode block (21), an upper electrode (14), a guide block (22), and a semi-annular electrode (23); the housing (10) is connected to a driven gear (8); the power supply (11) and an alarm light are located on the housing (10); two guide blocks (22) are provided and connected to the surface of an inner threaded cylinder (13); the upper electrode (14) is connected to one end of the guide block (22); the semi-annular electrode (23) is located inside the inner threaded cylinder (13); the upper electrodes (14) are connected to each other through the semi-annular electrode (23); the driven gear (8) has a groove (801) inside that is adapted to the guide block (22) and the upper electrode (14), and the electrode block (21) is located inside the groove (801).

2. An electromagnetic brake mechanism of an elevator hoisting machine according to claim 1, characterized in that, The spring assembly includes a slider (16) and a spring (18); the slider (16) is slidably disposed inside the moving groove (201); the two ends of the spring (18) are respectively connected to the pressure plate (3) and the inner wall of the moving groove (201); the slider (16) is connected to one end of the screw (12).

3. An electromagnetic brake mechanism of an elevator hoisting machine according to claim 1, characterized in that, A handle (4) is connected to the drive gear (6); aligned air holes are provided inside the pressure plate (3), drive gear (6) and handle (4); several grooves are provided on the surface of the brake disc (15) and brake shoe (19).

4. An electromagnetic brake mechanism of an elevator hoisting machine according to claim 1, characterized in that, The outer surface of the outer casing (10) is provided with a rotatable adapter ring (5); the adapter ring (5) is detachably connected to the fixed plate (2) via a connecting arm (9); the handle (4) is connected to the adapter ring (5) via a connecting rod.

5. An electromagnetic brake mechanism of an elevator hoist machine according to claim 4, characterized in that, The connecting arm (9) is provided with a scale; the pressure plate (3) is connected with a pointer (17) pointing to the scale.

6. The electromagnetic braking mechanism for an elevator traction machine according to claim 1, characterized in that, The electrode block (21), power supply (11) and alarm (7) are connected in series by wires.

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