Elevator emergency braking system and device

Abstract

The application provides a goods elevator emergency braking system and equipment, including a goods elevator car, the goods elevator car including a goods elevator main controller, the goods elevator main controller including a brake and a speed limiter and a safety clamp, the brake is equipped with a lubricating mechanism and a braking mechanism, the brake is used for emergency braking of the power output of the goods elevator car when the goods elevator car is powered off, stopping the operation of the goods elevator car, the goods elevator main controller can control the opening and closing of the brake in the powered state.The application is provided with a cylinder, a torsional spring and an electromagnet and a sleeve, under the magnetic action of the electromagnet, the torsional force of the torsional spring can be stabilized, then the two cylinders are used to limit the steel wire rope of the traction car, and the bristles on the sleeve are used to clean the steel wire rope, and after the goods elevator car is powered off, the two cylinders can clamp the brake disc under the action of the torsional force of the torsional spring.

Description

Technical Field

[0001] This invention relates to the field of elevator safety protection technology, and more specifically, to an emergency braking system and equipment for freight elevators. Background Technology

[0002] An elevator is a permanent transportation device that serves several specific floors within a building, with its car moving on at least two rigid tracks that are perpendicular to the horizontal plane or have an angle of inclination of less than 15° to the vertical. Freight elevators are a type of elevator, mainly used to transport goods. The braking device is an essential component of the elevator operating system. However, existing brakes only have a braking function and are ineffective when idle. Furthermore, existing elevator wire ropes require maintenance after prolonged use.

[0003] For example, the "Elevator Traction Steel Wire Rope Lubrication System" disclosed in Chinese Utility Model Patent (Application No.: 202121301734.5) states in its specification that: the traction steel wire rope is an important component of the elevator, and its maintenance plays a crucial role in the normal and safe operation of the elevator. Steel wire rope maintenance is an important part of routine elevator maintenance. While the steel wire rope is coated with sufficient grease during manufacturing, after frequent operation, the grease gradually decreases, and dust, debris, and other contaminants accumulate on the surface, causing wear on the steel wire rope and sheaves, and leading to rust. Therefore, the steel wire rope should be cleaned and lubricated regularly; the aforementioned application corroborates the deficiencies in the prior art.

[0004] Therefore, we have made improvements and proposed an emergency braking system and equipment for freight elevators. Summary of the Invention

[0005] The purpose of this invention is to address the problems of existing brakes, which only have a braking function and are ineffective when idle, resulting in poor functionality, and the need for maintenance and upkeep of existing elevator wire ropes after long-term use.

[0006] To achieve the above-mentioned objectives, the present invention provides the following emergency braking system and equipment for freight elevators to improve the aforementioned problems.

[0007] The application is as follows: The freight elevator emergency braking system includes a freight elevator car, the freight elevator car includes a freight elevator main controller, the freight elevator main controller includes a brake, a speed governor and a safety clamp, and the brake is provided with a lubrication mechanism and a braking mechanism.

[0008] As a preferred technical solution of this application, the brake is used to apply emergency braking to the power output of the freight elevator car when the power is cut off, thereby stopping the operation of the freight elevator car.

[0009] As a preferred technical solution of this application, the main controller of the freight elevator can control the opening and closing of the brake when it is powered on.

[0010] As a preferred technical solution of this application, the brake should be able to ensure that the freight elevator car remains stationary and its position unchanged under the rated load of the freight elevator car.

[0011] As a preferred technical solution of this application, the speed limiter can be linked with the safety clamp to stop the elevator car when other safety protection devices are not working.

[0012] As a preferred technical solution of this application, the speed limiter monitors and controls the speed of the freight elevator car at all times, and can send a signal in a timely manner when an overspeed occurs.

[0013] An emergency braking device for a freight elevator includes a base, a motor mounted on the end face of the base, a worm gear and a brake disc fixedly connected to the output shaft of the motor, a worm wheel meshing with the teeth of the worm gear, a winding disc fixedly connected to the surface of the worm wheel, a braking mechanism located on one side of the base, the braking mechanism including two cylinders located below the brake disc, grooves formed on the arc surfaces of the cylinders, and a lubrication mechanism located inside the cylinders, the lubrication mechanism including a storage bottle located inside the cylinders.

[0014] As a preferred technical solution of this application, the braking mechanism further includes two upright plates located on one side of the base. A round rod is rotatably connected to the surface of each of the two upright plates. A connecting plate is fixedly connected to the arc surface of each round rod. Two cylinders are respectively fixedly connected to the two connecting plates. A torsion spring is fitted onto the arc surface of each round rod. The two ends of the torsion spring are respectively fixedly connected to the upright plate and the round rod. A support rod is fixedly connected to the arc surface of each cylinder. An electromagnet is fixedly connected to the arc surface of the support rod. A sleeve is rotatably connected to the arc surface of the cylinder.

[0015] As a preferred technical solution of this application, the lubrication mechanism further includes a concave hole, which is formed on the arc surface of the sleeve and the cylinder. A protrusion is inserted inside the concave hole, and a pressure plate is fixedly connected to the surface of the protrusion. A connecting block and a first spring are fixedly connected to the side of the pressure plate away from the protrusion. The other end of the first spring is fixedly connected to the inner wall of the cylinder. A slide rail is fixedly connected to the inner wall of the cylinder. A limit sleeve is slidably connected to the inner wall of the slide rail. The storage bottle is located inside the limit sleeve. A conduit is connected to the surface of the storage bottle and is adhered to the arc surface of the cylinder.

[0016] As a preferred technical solution of this application, a second spring is fixedly connected to the side wall of the limiting sleeve, and a rectangular block is fixedly connected to the other end of the second spring. The rectangular block is fixedly connected to the inside of the cylinder. A slot is provided at the bottom of the limiting sleeve, and a locking block is slidably connected inside the slot. A square groove is provided inside the cylinder, and the size of the locking block matches the size of the square groove. A rectangular frame is fixedly connected to the side wall of the base, and a rectangular hole is provided on the end face of the rectangular frame.

[0017] As a preferred technical solution of this application, the arc surface of the round rod is provided with a force-saving mechanism, the force-saving mechanism including a gear, the gear being fixedly connected to the arc surface of the round rod, a pull plate being fixedly connected to the surface of the gear, a limit groove being formed on the surface of the pull plate, a fixing block being fixedly connected to the arc surface of the pull plate, a rotating shaft being rotatably connected to the surface of the fixing block, two fixing plates being fixedly connected to the arc surface of the rotating shaft, a storage box being fixedly connected to the side of the two fixing plates that are close to each other, a connecting rope being fixedly connected to the top of the storage box, the other end of the connecting rope being fixedly connected to the pull plate, a counterweight being fixedly connected to the bottom of the storage box, and a threaded ring being threadedly connected to the arc surface of the rotating shaft.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: 1. To address the problem that existing freight elevator brakes only function when the elevator is powered off and are ineffective during normal operation, this application utilizes a combination of cylinders, torsion springs, electromagnets, and sleeves. The electromagnets stabilize the torsional force of the torsion springs, while the two cylinders limit the movement of the traction cable in the car. The sleeves also clean the cable. After the elevator car is powered off, the torsional force of the torsion springs clamps the brake disc through the two cylinders, effectively braking the elevator car. Existing brakes are ineffective in idle states, resulting in better functionality compared to existing technologies. 2. This application, by setting up a sleeve, a storage bottle, and a protrusion, utilizes the friction between the wire rope and the sleeve to cause the sleeve to rotate and cooperate with the protrusion, allowing the lubricant in the storage bottle to flow onto the bristles on the sleeve, thus lubricating and maintaining the wire rope. By setting up a second spring, a limiting sleeve, a square groove, and a locking block, the engagement of the locking block and the square groove stabilizes the elastic force of the second spring. When braking occurs during power failure, the locking block moves under the action of gravity, causing the second spring to rebound and forcing one end of the limiting sleeve to abut into the annular groove, which enhances the clamping effect of the cylinder on the brake disc and improves the braking effect. In other words, the limiting sleeve can limit and store the storage bottle and also improve the braking effect on the brake disc. 3. The gears and pull plates facilitate the separation of the two cylinders from the brake disc by the rotation of the gears, thus saving labor. When the electromagnet is energized, the two pull plates contact each other and cover the wire rope. With the addition of a connecting rope and a storage box, when the wire rope contacts the connecting rope, the connecting rope continuously absorbs excess lubricant from the wire rope, extending it into the storage box to prevent excessive lubricant buildup on the wire rope. The counterweight ensures that the storage box remains open during braking, preventing the collected lubricant from contacting the connecting rope. Furthermore, when the cylinders clamp the brake disc, the storage box extends the pull plates, allowing different workers to hold the plates at different positions, further reducing effort. Attached Figure Description

[0019] Figure 1 A flowchart of the emergency braking system for a freight elevator provided in this application; Figure 2 A three-dimensional structural diagram of the emergency braking device for the freight elevator provided in this application; Figure 3 Emergency braking device for freight elevator provided in this application Figure 2 Partial structural diagram; Figure 4 A partial structural diagram of the upright plate, gears, and cylinder of the emergency braking device for the freight elevator provided in this application; Figure 5 This is a schematic diagram of the cylindrical structure of the emergency braking device for a freight elevator provided in this application; Figure 6 A schematic diagram showing the disassembled structure of the cylindrical emergency braking device for the freight elevator provided in this application; Figure 7 A schematic diagram of the structure of the limit sleeve for the emergency braking device of the freight elevator provided in this application; Figure 8 A schematic diagram of the structure of the emergency braking device pull plate of the freight elevator provided in this application after rotating 180 degrees; Figure 9 Emergency braking device for freight elevator provided in this application Figure 8 Schematic diagram of the structure at point A in the middle.

[0020] The image shows: 1. Base; 101. Motor; 102. Worm; 103. Worm Gear; 104. Winding Disc; 105. Brake Disc; 1051. Annular Groove; 106. Rectangular Frame; 107. Rectangular Hole; 108. Support Plate; 2. Braking Mechanism; 201. Vertical Plate; 202. Round Rod; 203. Connecting Plate; 204. Cylindrical Frame; 205. Slot; 206. Torsion Spring; 207. Support Rod; 208. Electromagnet; 209. Sleeve; 3. Lubrication Mechanism; 301. Concave Hole; 3011. Protrusion; 3 02. Pressure plate; 303. Connecting block; 304. First spring; 305. Slide rail; 306. Limiting sleeve; 3061. Locking block; 307. Storage bottle; 308. Second spring; 309. Rectangular block; 310. Square groove; 311. Conduit; 4. Force-saving mechanism; 401. Gear; 402. Pull plate; 403. Limiting groove; 404. Fixing block; 4041. Rotating shaft; 405. Fixing plate; 406. Storage box; 407. Connecting rope; 408. Counterweight; 409. Threaded ring. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] As mentioned in the background technology, existing brakes only have a braking function and are ineffective when idle. Furthermore, existing elevator wire ropes require maintenance after prolonged use.

[0023] To address this technical problem, the present invention provides an emergency braking system and equipment for freight elevators, which is applied in the field of elevator safety protection technology.

[0024] For details, please refer to Figure 1-9 The freight elevator emergency braking system details are as follows: It includes a freight elevator car, the freight elevator car includes a freight elevator main controller, the freight elevator main controller includes a brake, a speed governor and a safety clamp, and the brake is equipped with a lubrication mechanism 3 and a braking mechanism 2; The brake is used to apply emergency braking to the power output of the freight elevator car when the power is lost, stopping the operation of the freight elevator car; the main controller of the freight elevator can control the opening and closing of the brake when the power is on; the brake should be able to ensure that the freight elevator car remains stationary and unchanged in position under the rated load of the freight elevator car. When other safety protection devices fail, the speed governor can be linked with the safety brake to stop the elevator car. The speed governor constantly monitors and controls the speed of the freight elevator car, and can send a signal in time when overspeed occurs.

[0025] The emergency braking system for freight elevators provided by this invention can brake the elevator car to stop operation and ensure the safety of personnel when the power is cut off or a malfunction occurs.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] Example 1 Please refer to Figure 2 The emergency braking device for the freight elevator includes a base 1. A motor 101 is mounted on the end face of the base 1. The output shaft of the motor 101 is fixedly connected to a worm gear 102 and a brake disc 105. The tooth surface of the worm gear 102 meshes with a worm wheel 103. A winding disc 104 is fixedly connected to the surface of the worm wheel 103. A steel wire rope can be wound inside the winding disc 104. A support plate 108 is rotatably connected to one side of the worm wheel 103. The support plate 108 is fixedly connected to the ground. A braking mechanism 2 is located on one side of the base 1. The braking mechanism 2 includes two cylinders 204, both of which are located below the brake disc 105. The arc surface of the cylinders 204 has a slot 205. The inside of the cylinders 204 is hollow and communicates with the slot 205. A lubrication mechanism 3 is located inside the cylinders 204. The lubrication mechanism 3 includes a storage bottle 307. The storage bottle 307 is made of elastic material and contains lubricating fluid. The storage bottle 307 is located inside the cylinders 204.

[0030] The braking mechanism 2 can limit and clear the steel wire rope of the traction car. After the power is cut off to the freight elevator car, it can clamp the brake disc 105 to achieve braking of the freight elevator car. Compared with the existing technology, it has better functionality. The lubrication mechanism 3 can lubricate the steel wire rope.

[0031] Example 2 The emergency braking device for the freight elevator provided in Embodiment 1 is further optimized, specifically, as follows: Figure 2 and Figure 4As shown, the braking mechanism 2 also includes two upright plates 201, which are fixedly connected to the ground and located on one side of the base 1. Both upright plates 201 are rotatably connected to round rods 202. The arc surface of the round rods 202 is fixedly connected to connecting plates 203. Two cylinders 204 are fixedly connected to the two connecting plates 203 respectively. The arc surface of the round rods 202 is fitted with torsion springs 206. The two ends of the torsion springs 206 are fixedly connected to the upright plates 201 and the round rods 202 respectively. The arc surface of the cylinders 204 is fixedly connected to support rods 207. The arc surface of the support rods 207 is fixedly connected to electromagnets 208. The arc surface of the cylinders 204 is rotatably connected to sleeves 209, which have bristles. Under the magnetic action of the electromagnet 208, the torsional force of the torsion spring 206 can be stabilized, and then the steel wire rope of the traction car can be limited by the two cylinders 204. The steel wire rope can be cleaned by the bristles on the sleeve 209. After the power is cut off to the freight elevator car, under the action of the torsional force of the torsion spring 206, the brake disc 105 can be clamped by the two cylinders 204 to realize the braking of the freight elevator car. Example 3 The emergency braking device for the freight elevator provided in Embodiment 1 or 2 is further optimized, specifically, as follows: Figure 5 , Figure 6 and Figure 7 As shown, the lubrication mechanism 3 also includes a recessed hole 301, which is formed on the arc surface of the sleeve 209 and the cylinder 204. A protrusion 3011 is inserted inside the recessed hole 301. A pressure plate 302 is fixedly connected to the surface of the protrusion 3011. The pressure plate 302 is located inside the cylinder 204. A connecting block 303 and a first spring 304 are fixedly connected to the side of the pressure plate 302 away from the protrusion 3011. The other end of the first spring 304 is fixedly connected to the inner wall of the cylinder 204. A slide rail 305 is fixedly connected to the inner wall of the cylinder 204. A limit sleeve 306 is slidably connected to the inner wall of the slide rail 305. A storage bottle 307 is located inside the limit sleeve 306. A conduit 311 is connected to the surface of the storage bottle 307. The conduit 311 penetrates the cylinder 204 and is bonded to the arc surface of the cylinder 204. One end of the opening of the conduit 311 is not connected to the sleeve 209, but only in contact with it. By using the friction between the wire rope and the sleeve 209, the sleeve 209 can be rotated and cooperate with the protrusion 3011, so that the lubricant in the storage bottle 307 flows onto the bristles on the sleeve 209, which can lubricate and maintain the wire rope. A second spring 308 is fixedly connected to the side wall of the limiting sleeve 306. A rectangular block 309 is fixedly connected to the other end of the second spring 308. The rectangular block 309 is fixedly connected inside the cylinder 204. A slot is provided at the bottom of the limiting sleeve 306. A locking block 3061 is slidably connected inside the slot. A square groove 310 is provided inside the cylinder 204. The size of the locking block 3061 matches the size of the square groove 310. A rectangular frame 106 is fixedly connected to the side wall of the base 1. A rectangular hole 107 is provided on the end face of the rectangular frame 106. The rectangular hole 107 serves to limit the steel wire rope. An annular groove 1051 is provided on the surface of the brake disc 105. By engaging the locking block 3061 with the square groove 310, the elastic force of the second spring 308 can be stabilized. When braking occurs during power failure, the locking block 3061 will move under the action of gravity, causing the second spring 308 to rebound and forcing one end of the limiting sleeve 306 to abut into the annular groove 1051. This can enhance the clamping effect of the cylinder 204 on the brake disc 105 and improve the braking effect. In other words, the limiting sleeve 306 can limit and store the storage bottle 307 and also improve the braking effect on the brake disc 105. Example 4 The emergency braking device for freight elevators provided in Embodiment 1, 2, or 3 is further optimized, specifically, as follows: Figure 2 , Figure 8 and Figure 9 As shown, the arc surface of the round rod 202 is provided with a force-saving mechanism 4. The force-saving mechanism 4 includes a gear 401, which is fixedly connected to the arc surface of the round rod 202. A pull plate 402 is fixedly connected to the surface of the gear 401. The pull plate 402 is arc-shaped and has a limit groove 403 on its surface. A fixing block 404 is fixedly connected to the arc surface of the pull plate 402. A rotating shaft 4041 is rotatably connected to the surface of the fixing block 404. Two fixing plates 405 are fixedly connected to the arc surface of the rotating shaft 4041. The two fixing plates 405 are close to each other on one side. A storage box 406 is fixedly connected. A connecting rope 407 is fixedly connected to the top of the storage box 406. The other end of the connecting rope 407 is fixedly connected to the pull plate 402. The end of the connecting rope 407 that contacts the wire rope is in a ball shape. The two ends of the connecting rope 407 pass through the top of the storage box 406 and the pull plate 402 respectively. The end of the connecting rope 407 in the storage box 406 is suspended, that is, far from the bottom of the storage box 406. A counterweight 408 is fixedly connected to the bottom of the storage box 406. A threaded ring 409 is threadedly connected to the arc surface of the rotating shaft 4041. The rotation of gear 401 facilitates the separation of the two cylinders 204 from the brake disc 105 by the operator, thus saving some labor. Utilizing the characteristics of the connecting rope 407, excess lubricant on the wire rope is continuously absorbed and extended into the storage box 406, preventing excessive lubricant buildup on the wire rope. By setting a counterweight 408, the storage box 406 remains open during braking, preventing the collected lubricant from contacting the connecting rope 407. Furthermore, when the cylinders 204 clamp the brake disc 105, the storage box 406 also extends the pull plate 402, allowing different operators to hold the pull plate 402 at different positions, thus saving effort.

[0032] The usage process of the freight elevator emergency braking device provided by this invention is as follows: Working principle: When the freight elevator car needs to operate normally, the operator can first move the position of the wire rope, that is, pass the wire rope through the rectangular groove on the surface of the rectangular frame 106 and out of the rectangular frame 106. The operator can then push one of the pull plates 402. With the rotation of the round rod 202, the gear 401 rotates. The two gears 401 mesh with each other and drive synchronously. The slot 205 on the cylinder 204 will disengage from the brake disc 105. At this time, the torsion spring 206 is in a torsional state. After the cylinder 204 rotates to 180 degrees, the two electromagnets 208 are energized and will attract each other, thus affecting the torsion spring 206. The torsional force stabilizes the wire rope, and the two pull plates 402 will come into contact with each other. Under the action of the upper limit groove 403 of the pull plate 402, the wire rope can be placed between the two pull plates 402. Then, the limiting sleeve 306 can be pushed from the side of the cylinder 204 with the slot 205. Since the slot 205 is connected to the inside of the cylinder 204, the limiting sleeve 306 slides along the inside of the slide rail 305, which compresses the first spring 304. As the limiting sleeve 306 moves, after part of it passes the slide rail 305, the locking block 3061 will fall down from the slot at the bottom of the limiting sleeve 306 due to gravity and get stuck in the square groove 310. During normal operation, the output shaft of motor 101 drives the brake disc 105 and worm gear 102 to rotate. Worm gear 102 drives worm wheel 103 to rotate, which in turn causes winding disc 104 to rotate, winding or releasing the wire rope and moving the car up and down. During this time, the wire rope will always be in contact with sleeve 209. With the help of the friction between the two, sleeve 209 will rotate along the arc surface of cylinder 204, and the bristles on sleeve 209 will also clean the wire rope. When sleeve 209 rotates, it will squeeze protrusion 3011. Under the action of first spring 304, protrusion 3011 will retract, causing the pressure... Plate 302 drives connecting block 303 to squeeze storage bottle 307. The lubricant inside storage bottle 307 will flow through conduit 311 to the bristles on the surface of sleeve 209 to achieve the effect of lubricating wire rope. During the movement, wire rope will come into contact with connecting rope 407 between two pull plates 402. Since there will be lubricant coming out of conduit 311, wire rope will be continuously lubricated. The lubricant on wire rope will come into contact with connecting rope 407. Connecting rope 407 will continuously absorb the lubricant on wire rope and extend outward to drip into storage box 406. When the car is de-energized and braked, the magnetism of the electromagnet 208 disappears, and the torsion spring 206 twists. The two cylinders 204 rotate away from each other, and the slots 205 on the cylinders 204 engage with the brake disc 105, clamping it. After the cylinders 204 rotate 180 degrees, the original locking block 3061, which was at the bottom of the inner wall of the cylinder 204, is now at the top. Under gravity, the locking block 3061 slides down, detaches from the square slot 310, and moves into the slot at the bottom of the limiting sleeve 306. At this point, the second... When the spring 308 rebounds, one end of the limiting sleeve 306 will abut into the annular groove 1051 on the surface of the brake disc 105, enhancing the braking effect. During the upward swing of the cylinder 204, under the action of the counterweight 408 and with the help of the rotation of the shaft 4041, the end of the storage box 406 with the connecting rope 407 will continue to rise, and the storage box 406 will eventually stick to the pull plate 402, which can be used as an extension of the pull plate 402. When the operator pulls, the threaded ring 409 can be twisted to press the threaded ring 409 against the fixing block 404 to stabilize the shaft 4041.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. An emergency braking device for a freight elevator, comprising a base (1), wherein a motor (101) is mounted on the end face of the base (1), the output shaft of the motor (101) is fixedly connected to a worm gear (102) and a brake disc (105), the tooth surface of the worm gear (102) meshes with a worm wheel (103), and a winding disc (104) is fixedly connected to the surface of the worm wheel (103), characterized in that, The braking mechanism (2) is located on one side of the base (1). The braking mechanism (2) includes two cylinders (204), both of which are located below the brake disc (105). The arc surface of the cylinder (204) is provided with a slot (205). The lubrication mechanism (3) is located inside the cylinder (204). The lubrication mechanism (3) includes a storage bottle (307), which is located inside the cylinder (204). The braking mechanism (2) also includes two upright plates (201), which are located on one side of the base (1). The surfaces of the two upright plates (201) are rotatably connected to round rods (202). The arc surface of the round rods (202) is fixedly connected to connecting plates (203). The two cylinders (204) are fixedly connected to the two connecting plates (203) respectively. The arc surface of the round rods (202) is fitted with torsion springs (206). The two ends of the torsion springs (206) are fixedly connected to the upright plates (201) and the round rods (202) respectively. The arc surface of the cylinders (204) is fixedly connected to support rods (207). The arc surface of the support rods (207) is fixedly connected to electromagnets (208). The arc surface of the cylinders (204) is rotatably connected to sleeves (209).

2. The emergency braking device for freight elevators according to claim 1, characterized in that, The lubrication mechanism (3) also includes a concave hole (301), which is opened on the arc surface of the sleeve (209) and the cylinder (204). A protrusion (3011) is inserted inside the concave hole (3011). A pressure plate (302) is fixedly connected to the surface of the protrusion (3011). A connecting block (303) and a first spring (304) are fixedly connected to the side of the pressure plate (302) away from the protrusion (3011). The other end of the first spring (304) is fixedly connected to the inner wall of the cylinder (204). A slide rail (305) is fixedly connected to the inner wall of the cylinder (204). A limit sleeve (306) is slidably connected to the inner wall of the slide rail (305). The storage bottle (307) is located inside the limit sleeve (306). A conduit (311) is connected to the surface of the storage bottle (307). The conduit (311) is bonded to the arc surface of the cylinder (204).

3. The emergency braking device for freight elevators according to claim 2, characterized in that, The side wall of the limiting sleeve (306) is fixedly connected to a second spring (308), and the other end of the second spring (308) is fixedly connected to a rectangular block (309). The rectangular block (309) is fixedly connected inside the cylinder (204). The bottom of the limiting sleeve (306) is provided with a slot, and a locking block (3061) is slidably connected inside the slot. The inside of the cylinder (204) is provided with a square groove (310). The size of the locking block (3061) is adapted to the size of the square groove (310). The side wall of the base (1) is fixedly connected to a rectangular frame (106). The end face of the rectangular frame (106) is provided with a rectangular hole (107). The surface of the brake disc (105) is provided with an annular groove (1051).

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