Emergency brake and winch system thereof

Abstract

The emergency brake comprises a support, a connecting rod, a fluted disc and a push rod device, the fluted disc is used for being installed at one end of an input shaft of a speed reducer, the support is installed on one side of the fluted disc through a base, the push rod device is located on the other side of the fluted disc, and the fixed end of the push rod device is installed on the base through a hinged support. One end of the connecting rod is hinged to the support, and the other end of the connecting rod is hinged to the connector; a plurality of tooth grooves are formed in the outer circumference of the fluted disc, a limiting block is arranged on the side, close to the fluted disc, of the connecting rod, the fluted disc is limited when the limiting block enters one tooth groove, a complex control system is not needed in the whole process, and the fluted disc can be limited to achieve emergency braking.

Description

Technical Field

[0001] The utility model relates to the technical field of wire rope hoists, in particular to an emergency brake and its hoisting system. Background Art

[0002] Conventional hoists only have one kind of safety brake, which is the built-in brake of the motor or the externally installed electromagnetic brake. According to user requirements, especially in the lifting work platform where personnel need to enter, at least one set of safety brake mechanisms needs to be added. When the main brake or accidental brake occurs, to ensure that after the original motor electromagnetic brake fails, the added braking mechanism can still guarantee the safety of the objects or personnel suspended in the air, and increase the safety factor of the hoist. Therefore, an emergency brake and its hoisting system are proposed.

[0003] Chinese patent document CN221235136 U, publication date: June 28, 2024, discloses a wire rope hoist with a braking device, including a base, two brackets are fixedly arranged on the base, a rotating shaft is rotatably arranged between the two brackets, a drum is fixedly arranged on the rotating shaft, a rotational speed sensor is fixedly arranged on the side wall of one of the brackets, a cylinder is fixedly arranged on the side wall of the other bracket, the output shaft of the cylinder penetrates through the bracket and is fixedly provided with an insertion block, and a plurality of slots adapted to the insertion block are opened on the outer side wall of the drum close to the cylinder. By detecting the rotational speed of the drum with the rotational speed sensor, when the rotational speed sensor detects that the rotational speed of the drum exceeds the set value, it will send a signal to the controller, and the controller controls the cylinder to start. The output shaft of the cylinder drives the insertion block to move towards the drum, and by inserting the insertion block into one of the slots, the drum is stopped from rotating. Its characteristics are: the braking device is arranged outside the drum, which is convenient for inspection and maintenance and is automatically controlled; its disadvantage is that when the drum rotates rapidly, the insertion block cannot be accurately inserted into the slot, and in actual application, the requirements for the control system are very high, and the actual application effect is not ideal. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an emergency brake. By the limit block on the connecting rod being stuck into the tooth groove, the emergency braking of the hoisting system can be realized without a complex control system.

[0005] Another purpose of the utility model is to provide a hoisting system that adopts an emergency brake proposed in this application.

[0006] To achieve the above object, the utility model provides an emergency brake, which includes a support, a connecting rod, a toothed disc, and a push rod device. The toothed disc is used to be installed at one end of the input shaft of a speed reducer. The support is installed on one side of the toothed disc through a base. The push rod device is located on the other side of the toothed disc. The fixed end of the push rod device is installed on the base through a hinge seat. A joint is installed on the telescopic rod of the push rod device. One end of the connecting rod is hinged to the support, and the other end is hinged to the joint. A plurality of tooth grooves are provided on the outer circumference of the toothed disc. A limiting block is provided on the connecting rod on the side close to the toothed disc. When the limiting block enters one of the tooth grooves, the toothed disc is limited.

[0007] A cavity is provided inside the joint. A penetrating hole is provided at the bottom of the cavity of the joint. A step is provided on the telescopic rod. The upper end of the telescopic rod located at the step passes through the penetrating hole and enters the cavity. A first spring is sleeved on a section of the telescopic rod located inside the cavity. A limiting plate is installed at the end of the telescopic rod through a nut.

[0008] It further includes a detection device. The detection device includes a detection switch and a detection part. The detection part is installed on the joint. The detection switch is used to detect the up and down position of the detection part.

[0009] It further includes a power storage device. The power storage device includes a limiting component. The limiting component includes a support plate, a protruding seat, a limiting hook, a fixed rod, a second spring, and an electromagnet. The support plate is installed on the base. The protruding seat and the fixed rod are respectively fixedly installed on the support plate. The protruding seat and the fixed rod are located on the side close to the joint. The fixed rod is located above the protruding seat. The lower end of the limiting hook is hinged to the protruding seat through a pivot. A longitudinal long hole is provided at the upper end of the limiting hook. The fixed rod passes through the long hole and a limiting nut is installed. The second spring is sleeved on the fixed rod, and the second spring is located between the limiting hook and the support plate. The electromagnet is located above the protruding seat and is installed on the support plate. When the electromagnet is powered on, the electromagnet adsorbs the limiting hook so that the limiting hook can hook the lower end of the joint.

[0010] The power storage device further includes a hooking part. The hooking part is provided on the outer wall of the joint. The limiting hook hooks the hooking part.

[0011] Expansion plates are respectively provided on both sides of the upper end of the limiting hook. The long hole is provided on the expansion plate. Two fixed rods are fixedly connected to the support plate. The two fixed rods respectively pass through the long holes on the expansion plates on both sides. The electromagnet is located between the two fixed rods.

[0012] A hoisting system includes a motor, a speed reducer, and a hoisting drum. It further includes the above-mentioned emergency brake. The speed reducer adopts a double-input shaft speed reducer. One end of the input shaft of the double-input shaft speed reducer is connected and driven to the output shaft of the motor, and the other end is installed with a toothed disc.

[0013] The utility model has the following technical effects compared with the prior art:

[0014] 1. When emergency braking is required, the telescopic rod of the push rod device retracts to pull down the joint, and the joint drives the connecting rod to rotate clockwise. At this time, the limit block may just enter the tooth groove, but more often the limit block abuts against the outer circumference of the tooth disc. The push rod device still pulls down the connecting rod. When the tooth disc rotates and one of the tooth grooves aligns with the limit block, the limit block quickly snaps into the tooth groove under the action of the push rod device. The whole process can limit the tooth disc to achieve emergency braking without a complex control system.

[0015] 2. The telescopic rod of the push rod device retracts quickly. When the limit block does not enter the tooth groove, but the push rod device has retracted in place, thus compressing the first spring. When the tooth disc rotates and one of the tooth grooves aligns with the limit block, the connecting rod quickly swings clockwise under the action of the first spring, and the limit block quickly snaps into the tooth groove.

[0016] 3. When the hoisting system is running, the limit block does not snap into the tooth groove. At this time, the tooth disc rotates normally, the electromagnet is energized, the electromagnet adsorbs the upper end of the limit hook, and the lower end of the limit hook extends to the left. The push rod device uses an electric push rod or an electric cylinder. In order to prevent sudden power failure, when the hoisting system is running, the telescopic rod of the push rod device retracts. At this time, the lower end of the joint is blocked by the lower end of the limit hook, the joint is limited, and the first spring is compressed. When a sudden power failure occurs, the electromagnet is de-energized, the upper end of the limit hook is pushed out to the left under the action of the second spring, the lower end of the limit hook swings to the right, and the joint is disengaged from the limit hook. Refer to the figure. At this time, the connecting rod swings clockwise under the action of the first spring, so that the limit block snaps into the tooth groove. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0018] Figure 1 It is a state diagram when the limit block of the emergency brake of the present utility model is inserted into the tooth groove for braking.

[0019] Figure 2 It is a front view structural schematic diagram of the limit component of the present utility model.

[0020] Figure 3 It is a cross-sectional structural schematic diagram of the joint of the present utility model.

[0021] Figure 4 It is a top view structural schematic diagram of the limit component of the present utility model.

[0022] Figure 5 It is Figure 2 The sectional view A-A in

[0023] Figure 6This is a schematic structural diagram of the hoisting system of the present utility model.

[0024] Figure 7 This is a state diagram of the emergency brake of the present utility model when the limit block is not inserted into the tooth groove.

[0025] Figure 8 This is a state diagram of the emergency brake of the present utility model when the brake is released.

[0026] In the figure:

[0027] Hoisting system 100, motor 110, speed reducer 120, input shaft 121, hoisting drum 130;

[0028] Emergency brake 200, support 210, connecting rod 220, limit block 221, tooth disc 230, tooth groove 231, hinge seat 240, push rod device 250, telescopic rod 251, joint 260, cavity 261, penetration hole 262, first spring 270, limit plate 280, base 290;

[0029] Energy storage device 300, hook part 310, limit component 320, support plate 321, extension seat 322, limit hook 323, fixed rod 324, second spring 325, limit nut 326, electromagnet 327, extension plate 328, pivot 329;

[0030] Detection device 400, detection switch 410, detection piece 420. Detailed implementation manners

[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0032] Embodiment 1:

[0033] Please refer to Figure 1 、 7, 8. An emergency brake 200 includes a support 210, a connecting rod 220, a toothed disc 230, and a push rod device 250. The toothed disc 230 is used to be installed at one end of the input shaft 121 of the speed reducer 120. The support 210 is installed on one side of the toothed disc 230 through a base 290. The push rod device 250 is located on the other side of the toothed disc 230. The fixed end of the push rod device 250 is installed on the base 290 through a hinge seat 240. A joint 260 is installed on the telescopic rod 251 of the push rod device 250. One end of the connecting rod 220 is hinged to the support 210, and the other end is hinged to the joint 260. A plurality of tooth grooves 231 are provided on the outer circumference of the toothed disc 230. A limit block 221 is provided on the connecting rod 220 on the side close to the toothed disc 230. When the limit block 221 enters one of the tooth grooves 231, the toothed disc 230 is limited. In this embodiment, the push rod device 250 adopts a cylinder. When emergency braking is required, the telescopic rod 251 of the push rod device 250 retracts and pulls down the joint 260. The joint 260 drives the connecting rod 220 to rotate clockwise. At this time, the limit block 221 may just enter the tooth groove 231, see Figure 1 , but more often, see Figure 7 , the limit block 221 abuts against the outer circumference of the toothed disc 230. The push rod device 250 still pulls down the connecting rod 220. When the toothed disc 230 rotates and one of the tooth grooves 231 is aligned with the limit block 221, the limit block 221 quickly snaps into the tooth groove 231 under the action of the push rod device 250. The whole process does not require a complex control system to limit the toothed disc 230 to achieve emergency braking.

[0034] Embodiment Two:

[0035] See Figure 1 , 3 , 7, 8. On the basis of Embodiment One, a cavity 261 is provided inside the joint 260. A penetration hole 262 is provided at the bottom of the cavity 261 of the joint 260. A step is provided on the telescopic rod 251. The upper end of the telescopic rod 251 located at the step passes through the penetration hole 262 and enters the cavity 261. A first spring 270 is sleeved on a section of the telescopic rod 251 located inside the cavity 261. A limit plate 280 is installed at the end of the telescopic rod 251 through a nut. When the above structure is adopted, the push rod device 250 can adopt an electric push rod or an electric cylinder. When emergency braking is required, the telescopic rod 251 of the push rod device 250 quickly retracts, see Figure 7 , when the limit block 221 does not enter the tooth groove 231, but the push rod device 250 has retracted in place, thus compressing the first spring 270. When the toothed disc 230 rotates and one of the tooth grooves 231 is aligned with the limit block 221, the connecting rod 220 quickly swings clockwise under the action of the first spring 270, and the limit block 221 quickly snaps into the tooth groove 231.

[0036] Embodiment Three:

[0037] Based on Embodiment 1 or Embodiment 2, refer to Figure 1 、 7 、8, it further includes a detection device 400. The detection device 400 includes a detection switch 410 and a detection member 420. The detection member 420 is installed on the joint 260. The detection switch 410 is used to detect the up and down position of the detection member 420. In this embodiment, the detection switch 410 can adopt a travel switch or a magnetic induction proximity switch. By detecting and sensing the position of the detection member 420, a braking completion signal is sent.

[0038] Specifically, in this embodiment, only when the limit block 221 is engaged into the tooth groove 231, the detection switch 410 will detect and sense the detection member 420, and then send a signal.

[0039] Embodiment 4:

[0040] Based on Embodiment 1 or Embodiment 2, refer to Figure 1 、 2 、4 - 7, it further includes a power storage device 300. The power storage device 300 includes a limit component 320. The limit component 320 includes a support plate 321, a protruding seat 322, a limit hook 323, a fixing rod 324, a second spring 325 and an electromagnet 327. The support plate 321 is installed on the base 290. The protruding seat 322 and the fixing rod 324 are respectively fixedly installed on the support plate 321. The protruding seat 322 and the fixing rod 324 are located on the side close to the joint 260. The fixing rod 324 is located above the protruding seat 322. The lower end of the limit hook 323 is hinged to the protruding seat 322 through a pivot 329. A longitudinal long hole is provided at the upper end of the limit hook 323. A limit nut 326 is installed after the fixing rod 324 passes through the long hole. The second spring 325 is sleeved on the fixing rod 324, and the second spring 325 is located between the limit hook 323 and the support plate 321. The electromagnet 327 is located above the protruding seat 322 and is installed on the support plate 321. When the electromagnet 327 is powered on, the electromagnet 327 adsorbs the limit hook 323 so that the limit hook 323 can hook the lower end of the joint 260.

[0041] In this embodiment, refer to Figure 7, when the hoisting system is operating, the limit block 221 does not engage with the tooth groove 231. At this time, the tooth disc 230 rotates normally, the electromagnet 327 is energized, the electromagnet 327 adsorbs the upper end of the limit hook 323, the lower end of the limit hook 323 extends to the left. The push rod device 250 uses an electric push rod or an electric cylinder. In order to prevent sudden power outages, when the hoisting system is operating, the telescopic rod 251 of the push rod device 250 retracts. At this time, the lower end of the joint 260 is blocked by the lower end of the limit hook 323, the joint 260 is limited, and the first spring 270 is compressed. When a sudden power outage occurs, the electromagnet 327 is de-energized, the upper end of the limit hook 323 is pushed out to the left under the action of the second spring 325, the lower end of the limit hook 323 swings to the right, and the joint 260 is disengaged from the limit hook 323. See Figure 1 , at this time, the connecting rod 220 swings clockwise under the action of the first spring 270, so that the limit block 221 engages with the tooth groove 231.

[0042] Furthermore, in order to facilitate the limit hook 323 to stably hook the joint 260, the energy storage device 300 further includes a hooking portion 310. The hooking portion 310 is arranged on the outer wall of the joint 260, and the limit hook 323 hooks the hooking portion 310. In this embodiment, see Figure 1 , the hooking portion 310 is a triangular structural block with a flat lower part.

[0043] See Figure 2 , 4 , 5, on both sides of the upper end of the limit hook 323, there are respectively arranged extension plates 328. Long holes are arranged on the extension plates 328. Two fixing rods 324 are fixedly connected to the support plate 321. The two fixing rods 324 respectively pass through the long holes on the extension plates 328 on both sides, and the electromagnet 327 is located between the two fixing rods 324. By arranging the extension plates 328, a larger adsorption area is provided for the electromagnet 327, the adsorption stability of the electromagnet 327 is improved, and at the same time, it is also convenient to install the two fixing rods 324 and the second spring 325, improving the reliability of the movement of the limit hook 323.

[0044] Embodiment Five:

[0045] See Figure 6 , a hoisting system 100 includes a motor 110, a speed reducer 120 and a hoisting drum 130, and also includes the emergency brake 200 described above. The speed reducer 120 uses a double-input shaft speed reducer. One end of the input shaft 121 of the double-input shaft speed reducer is connected to the output shaft of the motor for transmission, and a tooth disc is installed at the other end. In this embodiment, the motor is equipped with a brake by itself.

[0046] The working principle or operation process of the present invention is as follows:

[0047] See Figure 7, when the hoisting system is operating, the limit block 221 does not engage into the tooth groove 231. At this time, the toothed disc 230 rotates normally, the electromagnet 327 is energized, the electromagnet 327 adsorbs the upper end of the limit hook 323, the lower end of the limit hook 323 extends leftward. The push rod device 250 uses an electric push rod or an electric cylinder. In order to prevent sudden power outages, when the hoisting system is operating, the telescopic rod 251 of the push rod device 250 retracts. At this time, the lower end of the joint 260 is blocked by the lower end of the limit hook 323, the joint 260 is limited, and the first spring 270 is compressed. When a sudden power outage occurs, the electromagnet 327 is de-energized, the upper end of the limit hook 323 is pushed out leftward under the action of the second spring 325, the lower end of the limit hook 323 swings rightward, and the joint 260 is disengaged from the limit hook 323. See Figure 1 , at this time, the connecting rod 220 swings clockwise under the action of the first spring 270, so that the limit block 221 engages into the tooth groove 231.

[0048] After the power is restored, see Figure 8 , extend the telescopic rod 251 of the push rod device 250, then energize the electromagnet 327 to adsorb the limit hook 323, and then retract the telescopic rod 251 of the push rod device 250, thus forming the state in Figure 7 again.

Claims

1. An emergency brake (200), characterized in that: It includes a support (210), a connecting rod (220), a gear disk (230), and a push rod device (250). The gear disk (230) is used to be installed at one end of the input shaft (121) of a speed reducer (120). The support (210) is installed on one side of the gear disk (230) through a base (290). The push rod device (250) is located on the other side of the gear disk (230). The fixed end of the push rod device (250) is installed on the base (290) through a hinge seat (240). A joint (260) is installed on the telescopic rod (251) of the push rod device (250). One end of the connecting rod (220) is hinged to the support (210), and the other end is hinged to the joint (260). A plurality of tooth grooves (231) are provided on the outer circumference of the gear disk (230). A limiting block (221) is provided on the side of the connecting rod (220) close to the gear disk (230). When the limiting block (221) enters one of the tooth grooves (231), the gear disk (230) is limited.

2. An emergency brake (200) according to claim 1, characterized in that: A cavity (261) is provided inside the joint (260). A penetrating hole (262) is provided at the bottom of the cavity (261) of the joint (260). A step is provided on the telescopic rod (251). The upper end of the telescopic rod (251) located at the step passes through the penetrating hole (262) and then enters the cavity (261). A first spring (270) is sleeved on a section of the telescopic rod (251) located inside the cavity (261). A limiting plate (280) is installed at the end of the telescopic rod (251) through a nut.

3. An emergency brake (200) according to claim 1 or 2, characterized in that: It further includes a detection device (400). The detection device (400) includes a detection switch (410) and a detection part (420). The detection part (420) is installed on the joint (260). The detection switch (410) is used to detect the up and down position of the detection part (420).

4. An emergency brake (200) according to claim 2, characterized in that: It further includes a power storage device (300). The power storage device (300) includes a limiting component (320). The limiting component (320) includes a support plate (321), a protruding seat (322), a limiting hook (323), a fixing rod (324), a second spring (325), and an electromagnet (327). The support plate (321) is installed on the base (290). The protruding seat (322) and the fixing rod (324) are respectively and fixedly installed on the support plate (321). The protruding seat (322) and the fixing rod (324) are located on the side close to the joint (260). The fixing rod (324) is located above the protruding seat (322). The lower end of the limiting hook (323) is hinged to the protruding seat (322) through a pivot (329). A longitudinal long hole is provided at the upper end of the limiting hook (323). A limiting nut (326) is installed after the fixing rod (324) passes through the long hole. The second spring (325) is sleeved on the fixing rod (324), and the second spring (325) is located between the limiting hook (323) and the support plate (321). The electromagnet (327) is located above the protruding seat (322) and is installed on the support plate (321). When the electromagnet (327) is powered on, the electromagnet (327) adsorbs the limiting hook (323) so that the limiting hook (323) can hook the lower end of the joint (260).

5. An emergency brake (200) according to claim 4, characterized in that: The power storage device (300) further includes a hooking part (310). The hooking part (310) is arranged on the outer wall of the joint (260). The limiting hook (323) hooks the hooking part (310).

6. An emergency brake (200) according to claim 4, characterized in that: Expansion plates (328) are respectively arranged on both sides of the upper end of the limiting hook (323). The long hole is arranged on the expansion plate (328). Two fixing rods (324) are fixedly connected to the support plate (321). The two fixing rods (324) respectively pass through the long holes on the expansion plates (328) on both sides. The electromagnet (327) is located between the two fixing rods (324).

7. A hoisting system (100) comprising a motor (110), a speed reducer (120) and a hoisting drum (130), characterized in that: It further includes an emergency brake (200) according to any one of claims 1-6. The speed reducer (120) is a double-input shaft speed reducer. One end of the input shaft (121) of the double-input shaft speed reducer is connected and driven to the output shaft of the motor (110), and a gear disc (230) is installed at the other end.

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