Double safety brake device for elevator belt

Abstract

To provide a double safety brake device for an elevator belt.SOLUTION: A double safety brake device for an elevator belt includes a base, a frictional brake mechanism, a clutch brake mechanism, a crank shaft, a belt shaft and a controller. A rotor that can come into close contact with or separate from the base is provided in the frictional brake mechanism. The rotor is coaxially provided outside the belt shaft, and the crank shaft has one end coaxially mounted to an output shaft of an elevator motor and the other end having a fixation shaft disk with a fixation friction plate. The belt shaft has one end around which an elevator belt is wound and the other end having a movable shaft disk with a movable friction plate. The fixation friction plate and the movable friction plate are driven to come into close contact with or separate from each other by the clutch brake mechanism. This configuration avoids slippage of the elevator belt, improves safety of an elevator, prevents damage of related mechanical components and reduces maintenance cost.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of elevators, and in particular to the technical field of double safety brake devices for elevator belts. [Background technology]

[0002] An elevator is a mechanical device that moves vertically between different floors of a building to transport people and goods. The main structures that move up and down are a car and a counterweight frame. The car provides passenger space, and the counterweight frame, as a counterweight structure, must always face the car in the vertical direction to reduce the operating load and ensure smooth acceleration of the car.

[0003] Currently, most commercially available elevators use elevator belts to pull the car and counterweight frame. For example, the invention with publication number CN116262589A discloses a thin, toothless, forced-drive elevator body using a belt, and the utility model with publication number CN206680045U discloses a belt elevator traction machine. In an emergency, the elevator must also use a brake to limit the rotation of the elevator belt and stop the car and counterweight frame. However, with existing brakes, the elevator belt will slip if the maximum torque limit is exceeded, reducing the stability and safety of the elevator. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] China Patent Publication CN116262589A [Patent Document 2] China Utility Model Publication CN206680045U Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to solve the problems of the prior art and to propose an elevator belt dual safety brake device that, in the event of an emergency, not only indirectly limits the rotation of the belt shaft and the elevator belt wound around the belt shaft by tightly contacting the rotor of the friction brake mechanism with the base to limit the rotor's rotation, thereby realizing braking of the car and counterweight frame, but also, when a set limit torque is exceeded, uses a clutch brake mechanism to separate the belt shaft from the crankshaft, thereby cutting off the elevator motor's drive of the belt shaft and immediately reducing torque, preventing elevator belt slippage, improving elevator safety, preventing damage to related mechanical parts, and reducing maintenance costs. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides: We propose a dual safety brake device for an elevator belt, comprising: a base, a friction brake mechanism, a clutch brake mechanism, a crankshaft, a belt shaft, and a controller; a rotor that can be brought into contact with or separated from the base is provided within the friction brake mechanism; the rotor is provided coaxially outside the belt shaft; one end of the crankshaft is coaxially attached to an output shaft of an elevator motor and a fixed shaft disc with fixed friction plates is provided at the other end; one end of the belt shaft is wound with an elevator belt and a movable shaft disc with movable friction plates is provided at the other end; the fixed friction plates and the movable friction plates are driven to come into contact with or separate from each other by the clutch brake mechanism; and the controller is electrically connected to the friction brake mechanism and the clutch brake mechanism, respectively.

[0007] Preferably, the friction brake mechanism includes a casing, a rotor, an armature, a coil core, and an elastic pressing assembly, wherein the elastic pressing assembly naturally presses the armature outward so that the rotor is sandwiched between the base and the armature, and the coil core attracts the armature and moves it inward when current is applied, thereby releasing the rotor together with the base.

[0008] Preferably, the rotor includes a bushing, a base ring, and a friction ring, the bushing and the base ring being coaxially fitted onto the outside of the belt shaft from the inside to the outside, adjacent surfaces of the belt shaft, the bushing, and the base ring being meshed with each other by teeth, and the friction ring being attached to the side of the base ring facing the base and the side facing the armature, respectively.

[0009] Preferably, the elastic pressing assembly includes a sheath, an inner spring, a pressing plate, and a position control pin, the position control pin having a position control screw head at one end and the other end extending into a base and threadingly engaging with the sheath, a pin annular flange at a portion of the position control pin located within the sheath, and both ends of the inner spring connected to the pressing plate and the pin annular flange, respectively, and the pressing plate located close to the armature.

[0010] Preferably, the free end of the position limiting pin is inserted into the central passage of the innerspring.

[0011] Preferably, the manual unlocking assembly further includes a manual unlocking assembly including an unlocking pin, a holding block, and a fastener, the unlocking pin having an unlocking screw head at one end and the other end screwed into the base and then passing through the through-hole of the armature, and the holding block attached to the free end of the unlocking pin by the fastener.

[0012] Preferably, the presser block is provided with a guide sleeve that passes through the armature along the through hole.

[0013] Preferably, the clutch brake mechanism includes a base, an outer spring, and a link, the base and the friction brake mechanism being respectively provided on opposite sides of the base, a shaft annular flange being provided on the outside of the belt shaft, the outer spring being coaxially fitted on the outside of the belt shaft and both ends being connected to the shaft annular flange and the base, respectively, and the belt shaft being indirectly connected to a manual brake lever or cylinder via a link. [Effects of the Invention]

[0014] The beneficial effects of the present invention are as follows: 1) By combining the friction brake mechanism and clutch brake mechanism, in the event of an emergency, the rotor of the friction brake mechanism will be brought into close contact with the base to limit the rotor's rotation, thereby indirectly limiting the rotation of the belt shaft and the elevator belt wound around the belt shaft and braking the car and counterweight frame. Furthermore, if the set limit torque is exceeded, the clutch brake mechanism will be used to separate the belt shaft from the crankshaft, cutting off the elevator motor's drive of the belt shaft, immediately reducing torque and preventing the elevator belt from slipping, thereby improving elevator safety, preventing damage to related mechanical parts, and reducing maintenance costs. 2) The casing, rotor, armature, coil core, and elastic pressure assembly together form a friction brake mechanism, so that even in the event of a power outage, the elastic pressure assembly can be used to automatically tighten the rotor to achieve the braking function, ensuring the safety of elevator use during power outages.In addition, because the elastic pressure assembly is composed of a sheath, inner spring, pressure plate, and position control pin, the pretension of the inner spring can be adjusted while twisting the position control pin, ensuring normal operation of the elastic pressure assembly for long periods of time. 3) A manual unlocking assembly, which is jointly constituted by an unlocking pin, a holding block, and a fastener, is added to the friction brake mechanism, so that in the event of a power outage, the unlocking pin can be manually turned outward, and the holding block can be used to push the armature inward, thereby releasing the rotor. 4) The base, outer spring, and link jointly constitute the clutch brake mechanism, so that the outer spring can be used to keep the fixed friction plate and the movable friction plate in close contact at all times, and can also automatically separate the movable friction plate from the fixed friction plate when the manual brake lever is pulled or the cylinder is activated. The features and advantages of the present invention will be explained in detail through examples and the accompanying drawings. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a front view of the elevator belt dual safety brake device of the present invention when only the friction brake is used. [Figure 2] FIG. 2 is a cross-sectional view of the elevator belt dual safety brake device of the present invention when only the friction brake is used. [Figure 3] FIG. 3 is a partially enlarged schematic view of FIG. 2. [Figure 4] 1 is a cross-sectional view of a dual safety brake device for an elevator belt according to the present invention, in which a friction brake and a clutch brake are combined. [Figure 5] FIG. 5 is a partially enlarged schematic view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] As shown in FIGS. 1 to 5, the elevator belt dual safety brake device of the present invention includes a base 1, a friction brake mechanism 2, a clutch brake mechanism 3, a crankshaft 4, a belt shaft 5, and a controller. A rotor that can be brought into contact with or separated from the base 1 is provided within the friction brake mechanism 2, and the rotor is provided coaxially on the outside of the belt shaft 5. One end of the crankshaft 4 is provided coaxially with the output shaft of an elevator motor, and the other end is provided with a fixed shaft disc 41 with fixed friction plates 42. The belt shaft 5 has one end around which an elevator belt is wound, and the other end is provided with a movable shaft disc 51 with movable friction plates 52. The fixed friction plates 42 and the movable friction plates 52 are driven by the clutch brake mechanism 3 to come into contact with or separate from each other. The controller is electrically connected to the friction brake mechanism 2 and the clutch brake mechanism 3, respectively.

[0017] The friction brake mechanism 2 includes a casing 21, a rotor, an armature 25, a coil core 26, and an elastic pressing assembly 27. In a natural state, the elastic pressing assembly 27 presses the armature 25 outward so that the rotor is sandwiched between the base 1 and the armature 25. When current is applied, the coil core 26 attracts the armature 25 and moves it inward, releasing the rotor together with the base 1.

[0018] The rotor includes a bushing 22, a base ring 23, and a friction ring 24, and the bushing 22 and the base ring 23 are coaxially fitted onto the outside of the belt shaft 5 from the inside to the outside, and adjacent surfaces of the belt shaft 5, the bushing 22, and the base ring 23 mesh with each other by teeth, and the friction ring 24 is attached to the side of the base ring 23 facing the base 1 and the side facing the armature 25, respectively.

[0019] The elastic pressing assembly 27 includes a sheath 271, an inner spring 272, a pressure plate 273, and a position control pin 274. The position control pin 274 has a position control screw head at one end and the other end extending into the base 1 and screwing through the sheath 271. A pin annular flange is provided on the portion of the position control pin 274 located inside the sheath 271. Both ends of the inner spring 272 are connected to the pressure plate 273 and the pin annular flange, respectively. The pressure plate 273 is provided close to the armature 25.

[0020] The free end of the position limiting pin 274 is inserted into the central passage of the inner spring 272 . The manual unlocking assembly 28 further includes a manual unlocking assembly 28, which includes an unlocking pin 281, a pressing block 282, and a fastener 283. The unlocking pin 281 has an unlocking screw head at one end and the other end threaded into the base 1 and then passes through a through-hole in the armature 25. The pressing block 282 is attached to the free end of the unlocking pin 281 by the fastener 283.

[0021] The presser block 282 is provided with a guide sleeve that passes through the armature 25 along the through hole.

[0022] The clutch brake mechanism 3 includes a base 31, an outer spring 32, and a link 33, the base 31 and the friction brake mechanism 2 being respectively provided on opposite sides of the base 1, a shaft annular flange 53 being provided on the outside of the belt shaft 5, the outer spring 32 being coaxially fitted on the outside of the belt shaft 5 and both ends being connected to the shaft annular flange 53 and the base 31, respectively, and the belt shaft 5 being indirectly connected to a manual brake lever or cylinder 34 via the link 33.

[0023] The working process of the present invention is as follows.

[0024] During normal operation, the fixed friction plate 42 and the movable friction plate 52 are in close contact with each other, so that the elevator motor indirectly drives the elevator belt to rotate via the crankshaft 4 and the belt shaft 5, thereby causing the car and counterweight frame to be pulled by the elevator belt and move up and down. Furthermore, when energized, the coil core 26 attracts the armature 25 through magnetic force, causing the rotor to rotate together with the belt shaft 5.

[0025] In the event of an emergency, when the power to the coil core 26 is turned off, the armature 25 moves toward the base 1 under the elastic pressing action of the elastic pressing assembly 27 and sandwiches the base ring 23 with the friction ring 24 together with the base 1. Meanwhile, the base ring 23 indirectly restricts the rotation of the belt shaft 5 through the bushing 22, thereby stopping the car and the counterweight frame.

[0026] Furthermore, when a set limit torque is reached, the clutch brake mechanism 3 can also interrupt the driving of the belt shaft 5 by the elevator motor. Specifically, the manual brake lever can separate the belt shaft 5 from the crankshaft 4 until the fixed friction plates 42 and the movable friction plates 52 separate, while the cylinder 34 can also separate the belt shaft 5 from the crankshaft 4 until the fixed friction plates 42 and the movable friction plates 52 separate from each other. Here, the cylinder 34 can be operated by being supplied with power from a backup battery.

[0027] The above embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and any simple transformation of the present invention is also within the scope of protection of the present invention. [Explanation of symbols]

[0028] 1 base 2 Friction brake mechanism 21 Casing 22 Bush 23 Base Ring 24 Friction Ring 25 Armature 26 Coil Core 27 Elastic Press Assembly 271 Sheath 272 inner spring 273 Presser plate 274 Position control pin 28 Manual Unlock Assembly 281 Unlocking pin 282 Presser block 283 Zipper 3 Clutch brake mechanism 31 Base 32 outer spring 33 Links 34 cylinders 4 crankshaft 41 Fixed shaft disc 42 Fixed friction plate 5 Belt shaft 51 Movable shaft disc 52 Movable friction plate 53 Shaft annular flange

Claims

1. A dual safety brake device for an elevator belt, comprising: The device includes a base (1), a friction brake mechanism (2), a clutch brake mechanism (3), a crankshaft (4), a belt shaft (5), and a controller; A rotor that can be brought into close contact with or separated from the base (1) is provided within the friction brake mechanism (2), The rotor is mounted coaxially outside the belt shaft (5), The crankshaft (4) has one end coaxially attached to the output shaft of the elevator motor, and the other end is provided with a fixed shaft disc (41) with a fixed friction plate (42). The belt shaft (5) has an elevator belt wound around one end thereof and a movable shaft disc (51) with a movable friction plate (52) at the other end thereof. The fixed friction plate (42) and the movable friction plate (52) are driven by a clutch / brake mechanism (3) so as to come into contact with or separate from each other, The controller is electrically connected to the friction brake mechanism (2) and the clutch brake mechanism (3), respectively. A double safety brake device for elevator belts.

2. The friction brake mechanism (2) includes a casing (21), a rotor, an armature (25), a coil core (26), and an elastic pressing assembly (27); The elastic pressing assembly (27) naturally pushes the armature (25) outward, sandwiching the rotor between the base (1) and the armature (25), and when energized, the coil core (26) attracts the armature (25) and moves it inward, releasing the rotor together with the base (1).

2. The elevator belt double safety brake device according to claim 1.

3. The rotor includes a bushing (22), a base ring (23), and a friction ring (24); The bushing (22) and the base ring (23) are fitted coaxially on the outside of the belt shaft (5) from the inside to the outside, and adjacent surfaces of the belt shaft (5), the bushing (22), and the base ring (23) are meshed with each other by teeth, and the friction ring (24) is attached to the side of the base ring (23) facing the base (1) and the side facing the armature (25), respectively.

3. The elevator belt double safety brake device according to claim 2.

4. The elastic pressure assembly (27) includes a sheath (271), an inner spring (272), a retaining plate (273), and a positioning pin (274). The position control pin (274) has a position control screw head at one end and the other end extending into the base (1) and threadingly engaging with the sheath (271) to pass through it. A pin annular flange is provided at the portion of the position control pin (274) located within the sheath (271). Both ends of the inner spring (272) are connected to a presser plate (273) and the pin annular flange, respectively. The presser plate (273) is provided close to the armature (25).

3. The elevator belt double safety brake device according to claim 2.

5. 5. The elevator belt double safety brake system of claim 4, wherein the free end of the position limiting pin (274) is inserted into the central passage of the innerspring (272).

6. further comprising a manual unlocking assembly (28), said manual unlocking assembly (28) comprising an unlocking pin (281), a hold-down block (282), and a fastener (283); The unlocking pin (281) has an unlocking screw head at one end and the other end is screwed into the base (1) and then passes through the through-hole of the armature (25). The pressing block (282) is attached to the free end of the unlocking pin (281) by a fastener (283).

6. The double safety brake device for an elevator belt according to claim 2, wherein the brake device is a brake belt.

7. 7. The elevator belt double safety brake device according to claim 6, wherein the presser block (282) is provided with a guide sleeve that passes through the armature (25) along a through hole.

8. The clutch brake mechanism (3) includes a base (31), an outer spring (32), and a link (33), The base (31) and the friction brake mechanism (2) are provided on opposite sides of the base (1), a shaft annular flange (53) is provided on the outside of the belt shaft (5), the outer spring (32) is coaxially fitted on the outside of the belt shaft (5) and both ends are connected to the shaft annular flange (53) and the base (31), respectively, and the belt shaft (5) is indirectly connected to a manual brake lever or cylinder (34) via a link (33).

2. The elevator belt double safety brake device according to claim 1.

Images