Safety speed limiter for elevator

Abstract

The utility model discloses a safety speed limiter for an elevator, which belongs to the technical field of elevator speed limiters and comprises a base, the top of the base is fixedly connected with two fixing plates, a winding wheel is rotatably connected between the two fixing plates, one side of the winding wheel is in transmission connection with a speed control component, and one side of the speed control component is provided with a cooling component. According to the utility model, the brake block drives the ratchet bar to move towards the outer side, and at the moment, the limiting rod is matched with the second spring to realize one-way limiting of the ratchet bar, so that the situation that the ratchet bar is gradually attached to the friction block in the resetting and brake block moving process, the resistance borne by the rotating disc is increased, and the rotating speed of the rotating disc is reduced can be avoided; the higher the speed of the elevator is, the larger the centrifugal force borne by the brake block is, the brake block and the friction block can make contact as early as possible, the larger the friction force between the brake block and the friction block is, and therefore the speed limiting effect on the elevator is improved, and operation safety of the elevator is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevator speed limiters, and in particular relates to a safety speed limiter for elevators. Background Art

[0002] An elevator is a permanent transportation device that serves several specific floors in a building. Its car runs on at least two rows of rigid tracks that are perpendicular to the horizontal plane or inclined at an angle of less than 15° to the plumb line. The elevator speed limiter is one of the four major safety components of the elevator. It ensures that the elevator can trigger the safety device in time in the event of an accidental overspeed.

[0003] The utility model of Chinese patent application number: CN202222079786.3 discloses an elevator speed limiter, including a frame, a speed limiting disc, a brake disc, a centrifugal assembly and a brake mechanism; the speed limiting disc is connected to the frame through a bearing; the brake disc is arranged on one side of the speed limiting disc and is detachably connected to the speed limiting disc; the centrifugal assembly is arranged on the other side of the speed limiting disc and is detachably connected to the speed limiting disc; the brake mechanism is arranged at one end of the outer circumferential surface of the speed limiting disc. The application provides a brake disc and a brake device, and the brake mechanism clamps the brake disc to decelerate the brake disc, reduce the rotation speed of the speed limiting disc, thereby reducing the moving speed of the wire rope, thereby achieving the deceleration of the wire rope without clamping the wire rope, protecting the wire rope and extending the service life of the wire rope. However, in actual use, the elevator cable will generate high temperature during operation. If it cannot be cooled in time, the cable may be deformed due to continuous high temperature, affecting the safety of cable use. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that cables are deformed due to continuous high temperature, which affects the safety of cable use, and proposes a safety speed limiter for elevators.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A safety speed limiter for an elevator, comprising a base, two fixing plates are fixedly connected to the top of the base, a winding wheel is rotatably connected between the two fixing plates, a speed control component is transmission-connected to one side of the winding wheel, and a cooling component is arranged on one side of the speed control component;

[0007] The speed control assembly includes a fixed block, which is fixedly connected to the top of the base through a mounting seat, a cavity is opened inside the fixed block, a connecting shaft is rotatably connected in the cavity, a rotating disk is fixedly connected to the outer surface of the connecting shaft, sliding grooves are opened all around the rotating disk, a fixed sleeve is fixedly connected in the sliding groove, a moving rod is slidably connected in the fixed sleeve, one end of the moving rod is fixedly connected to a slide plate, a third spring is sleeved on the outer surface of the moving rod, two ends of the third spring are respectively fixedly connected to one side of the slide plate and one side of the fixed sleeve, the other end of the moving rod is fixedly connected to a ratchet bar, the other end of the ratchet bar is fixedly connected to a brake block, and a friction block is fixedly connected to the inner wall of the cavity, and the brake block fits with the friction block.

[0008] As a further description of the above technical solution:

[0009] The cam is provided with a second spring on the outer surface of the limit rod, and two ends of the second spring are respectively fixedly connected to one side of the mobile sleeve and one side of the limit plate, and the other end of the electric push rod is fixedly connected to one side of the rotating disk. The mobile sleeve is slidably connected to a limit rod, and one end of the limit rod extends into the sliding groove and fits with one side of the ratchet bar.

[0010] As a further description of the above technical solution:

[0011] One end of the connecting shaft extends to the outside of the cavity and is fixedly connected to one side of the winding wheel. The cross-sectional shape of the friction block is annular, and the cross-sectional shape of the cavity is circular.

[0012] As a further description of the above technical solution:

[0013] The cooling component includes a fixed box, one side of the fixed box is fixedly connected to one side of the fixed block, a liquid bag is fixedly connected to the top of the inner wall of the fixed box, an extrusion plate is fixedly connected to the bottom of the liquid bag, two sliding rods are fixedly connected to the bottom of the extrusion plate, one end of the two sliding rods extends to the outside of the fixed box and is fixedly connected to a bonding plate, a cam is bonded to the bottom of the bonding plate, the cam is fixedly connected to the outer surface of the connecting shaft, a first spring is sleeved on the outer surface of the sliding rod, and two ends of the first spring are respectively fixedly connected to the bottom of the fixed box and the top of the bonding plate.

[0014] As a further description of the above technical solution:

[0015] A nozzle is fixedly connected to one side of the liquid sac, one end of the nozzle extends to the outside of the fixed box, a one-way liquid outlet valve is arranged inside the nozzle, a water storage tank is fixedly connected to the top of the fixed block, one end of the liquid sac is fixedly connected to a connecting pipe, the other end of the connecting pipe is connected to one side of the water storage tank, and a one-way liquid inlet valve is arranged inside the connecting pipe.

[0016] As a further description of the above technical solution:

[0017] A driving motor is fixedly mounted on one side of the fixing plate through a mounting plate, a rotating shaft is fixedly connected to one side of the winding wheel, and one end of the rotating shaft extends to one side of the fixing plate and is fixedly connected to one end of an output shaft of the driving motor.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0019] 1. In the utility model, by setting a speed control component, when the speed of the winding wheel is too fast, the speed of the rotating disk is too fast. At this time, the centrifugal force applied to the brake block is greater than the elastic force of the third spring, and the brake block drives the ratchet bar to move outward. At this time, the cooperation of the limit rod and the second spring realizes the one-way limiting of the ratchet bar, which can avoid the resetting of the ratchet bar. During the movement of the brake block, it gradually fits with the friction block, which increases the resistance applied to the rotating disk and reduces the speed of the rotating disk. The rotating disk drives the winding wheel to slow down through the connecting shaft. The faster the elevator speed is, the greater the centrifugal force applied to the brake block, so that the brake block and the friction block can contact as early as possible, and the friction between the two is greater, thereby improving the speed limiting effect of the elevator and ensuring the safe operation of the elevator.

[0020] 2. In the utility model, by setting a cooling component, during the operation of the winding wheel, the winding wheel drives the cam to rotate, the cam cooperates with the first spring to drive the bonding plate to do reciprocating motion, the bonding plate drives the extrusion plate to do reciprocating motion through the sliding rod, the extrusion plate drives the liquid bag to expand or contract periodically and cooperates with the connecting pipe and the nozzle to realize the one-way flow and delivery of cooling water in the water tank, so that the cooling water is sprayed onto the cable on the winding wheel through the nozzle, the cable is cooled, the cable can be prevented from being deformed due to excessive temperature during operation, and the safety factor of the elevator operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0023] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A;

[0024] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure of part B.

[0025] Legend:

[0026] 1. Base; 2. Fixed plate; 3. Cooling component; 301. Cam; 302. Fixed box; 303. Liquid capsule; 304. Water tank; 305. Connecting pipe; 306. Nozzle; 307. Sliding rod; 308. Extrusion plate; 309. First spring; 310. Laminating plate; 4. Speed ​​control component; 401. Fixed block; 402. Friction block; 403. Rotating disk; 404. Connecting shaft; 405. Ratchet bar; 406. Brake block; 407. Limit rod; 408. Second spring; 409. Moving sleeve; 410. Side plate; 411. Electric push rod; 412. Slide plate; 413. Third spring; 414. Fixed sleeve; 415. Moving rod; 5. Winding wheel; 6. Driving motor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 4 The utility model provides a technical solution: a safety speed limiter for an elevator, comprising a base 1, two fixed plates 2 are fixedly connected to the top of the base 1, a winding wheel 5 is rotatably connected between the two fixed plates 2, one side of the winding wheel 5 is transmission-connected with a speed control component 4, one side of the speed control component 4 is provided with a cooling component 3, one side of the fixed plate 2 is fixedly installed with a driving motor 6 through a mounting plate, one side of the winding wheel 5 is fixedly connected with a rotating shaft, one end of the rotating shaft extends to one side of the fixed plate 2 and is fixedly connected to one end of the output shaft of the driving motor 6.

[0029] The speed control component 4 includes a fixed block 401, which is fixedly connected to the top of the base 1 through a mounting seat, a cavity is provided inside the fixed block 401, a connecting shaft 404 is rotatably connected in the cavity, a rotating disk 403 is fixedly connected to the outer surface of the connecting shaft 404, sliding grooves are provided all around the rotating disk 403, a fixed sleeve 414 is fixedly connected in the sliding groove, a moving rod 415 is slidably connected in the fixed sleeve 414, one end of the moving rod 415 is fixedly connected to a slide plate 412, a third spring 413 is sleeved on the outer surface of the moving rod 415, two ends of the third spring 413 are respectively fixedly connected to one side of the slide plate 412 and one side of the fixed sleeve 414, a ratchet bar 405 is fixedly connected to the other end of the moving rod 415, a brake block 406 is fixedly connected to the other end of the ratchet bar 405, a friction block 402 is fixedly connected to the inner wall of the cavity, the brake block 406 is in contact with the friction block 402, and a rotating disk 403 is provided on one side. A movable sleeve 409 is provided, and two electric push rods 411 are fixedly connected to one side of the movable sleeve 409, and the other end of the electric push rod 411 is fixedly connected to one side of the rotating disk 403. A limit rod 407 is slidably connected inside the movable sleeve 409, and one end of the limit rod 407 extends into the sliding groove and fits with one side of the ratchet bar 405. The outer surface of the limit rod 407 is fixedly connected to a limit plate, and the limit plate fits with one side of the rotating disk 403. A second spring 408 is sleeved on the outer surface of the limit rod 407, and the two ends of the second spring 408 are respectively fixedly connected to one side of the movable sleeve 409 and one side of the limit plate. The end of the movable rod 415 away from the ratchet bar 405 is fixedly connected to a side plate 410, and the side plate 410 fits with one side of the movable sleeve 409. One end of the connecting shaft 404 extends to the outside of the cavity and is fixedly connected to one side of the winding wheel 5. The cross-sectional shape of the friction block 402 is annular, and the cross-sectional shape of the cavity is circular.

[0030] The cooling component 3 includes a fixed box 302, one side of the fixed box 302 is fixedly connected to one side of the fixed block 401, the top of the inner wall of the fixed box 302 is fixedly connected to a liquid capsule 303, the bottom of the liquid capsule 303 is fixedly connected to an extrusion plate 308, the bottom of the extrusion plate 308 is fixedly connected to two sliding rods 307, one end of the two sliding rods 307 extends to the outside of the fixed box 302 and is fixedly connected to a bonding plate 310, the bottom of the bonding plate 310 is bonded to a cam 301, the cam 301 is fixedly connected to the outer surface of the connecting shaft 404, and the outer surface of the sliding rod 307 A first spring 309 is sleeved on the surface, and two ends of the first spring 309 are fixedly connected to the bottom of the fixed box 302 and the top of the bonding plate 310 respectively; a nozzle 306 is fixedly connected to one side of the liquid capsule 303, one end of the nozzle 306 extends to the outside of the fixed box 302, and a one-way liquid outlet valve is arranged inside the nozzle 306; a water storage tank 304 is fixedly connected to the top of the fixed block 401, one end of the liquid capsule 303 is fixedly connected to a connecting pipe 305, the other end of the connecting pipe 305 is connected to one side of the water storage tank 304, and a one-way liquid inlet valve is arranged inside the connecting pipe 305.

[0031] Working principle: When in use, when the elevator is running, the driving motor 6 drives the winding wheel 5 to rotate through the rotating shaft. At this time, the winding wheel 5 drives the cam 301 to rotate, and the cam 301 drives the bonding plate 310 to move. At the same time, the first spring 309 drives the bonding plate 310 to perform a reset movement, so that the bonding plate 310 performs a reciprocating motion, and the bonding plate 310 drives the sliding rod 307 to perform a reciprocating motion, and the sliding rod 307 drives the squeezing plate 308 to perform a reciprocating motion, and the squeezing plate 308 drives the liquid capsule 303 to expand or contract periodically. The liquid capsule 303 cooperates with the connecting pipe 305 and the nozzle 306 to realize the one-way circulation and delivery of the cooling water in the water tank 304, so that the cooling water is sprayed to the cable on the winding wheel 5 through the nozzle 306 to cool the cable;

[0032] When the speed of the winding wheel 5 is too fast, the speed of the rotating disk 403 is also very fast. At this time, the centrifugal force on the brake block 406 increases, causing the brake block 406 to drive the ratchet bar 405 to move outward. During this process, the ratchet bar 405 will drive the limit rod 407 to move, and then the limit rod 407 will reset under the drive of the second spring 408, and limit the ratchet bar 405 in one direction to prevent the ratchet bar 405 from resetting. After moving a certain distance, the brake block 406 will fit with the friction block 402, thereby increasing the friction force overcome by the rotation of the rotating disk 403, and the rotating disk 403 will slowly decelerate. The connecting shaft 404 drives the winding wheel 5 to slow down, thereby controlling the running speed of the elevator. When the speed of the winding wheel 5 is normal, the electric push rod 411 drives the moving sleeve 409 to move, the moving sleeve 409 drives the side plate 410 to move, the side plate 410 drives the limit rod 407 to move, and the limit rod 407 releases the limit on the ratchet bar 405. At this time, the third spring 413 drives the slide plate 412 to perform a reset movement, so that the slide plate 412 drives the brake block 406 to reset through the moving rod 415 and the ratchet bar 405, so that the brake block 406 is separated from the friction block 402, thereby reducing the friction force on the rotating disk 403 when it rotates.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A safety speed governor for an elevator, comprising a base (1), characterized in that: Two fixed plates (2) are fixedly connected to the top of the base (1); a winding wheel (5) is rotatably connected between the two fixed plates (2); a speed control component (4) is transmission-connected to one side of the winding wheel (5); and a cooling component (3) is provided on one side of the speed control component (4); The speed control assembly (4) comprises a fixed block (401), wherein the fixed block (401) is fixedly connected to the top of the base (1) via a mounting seat, wherein a cavity is provided inside the fixed block (401), wherein a connecting shaft (404) is rotatably connected inside the cavity, wherein a rotating disk (403) is fixedly connected to the outer surface of the connecting shaft (404), wherein sliding grooves are provided around the rotating disk (403), wherein a fixed sliding sleeve (414) is fixedly connected inside the sliding groove, wherein a moving rod (415) is slidably connected inside the fixed sliding sleeve (414), wherein the moving rod One end of the movable rod (415) is fixedly connected to a slide plate (412), the outer surface of the movable rod (415) is sleeved with a third spring (413), the two ends of the third spring (413) are respectively fixedly connected to one side of the slide plate (412) and one side of the fixed sleeve (414), the other end of the movable rod (415) is fixedly connected to a ratchet bar (405), the other end of the ratchet bar (405) is fixedly connected to a brake block (406), the inner wall of the cavity is fixedly connected to a friction block (402), and the brake block (406) is in contact with the friction block (402).

2. The safety speed governor for an elevator according to claim 1, characterized in that: A movable sleeve (409) is provided on one side of the rotating disk (403), and two electric push rods (411) are fixedly connected to one side of the movable sleeve (409), and the other end of the electric push rod (411) is fixedly connected to one side of the rotating disk (403). A limit rod (407) is slidably connected inside the movable sleeve (409), and one end of the limit rod (407) extends into the sliding groove and fits with one side of the ratchet bar (405). The limit rod (407) The outer surface is fixedly connected with a limit plate, and the limit plate is in contact with one side of the rotating disk (403). The outer surface of the limit rod (407) is sleeved with a second spring (408), and the two ends of the second spring (408) are respectively fixedly connected with one side of the movable sleeve (409) and one side of the limit plate. The end of the movable rod (415) away from the ratchet bar (405) is fixedly connected with a side plate (410), and the side plate (410) is in contact with one side of the movable sleeve (409).

3. A safety speed governor for an elevator according to claim 2, characterized in that: One end of the connecting shaft (404) extends to the outside of the cavity and is fixedly connected to one side of the winding wheel (5); the cross-sectional shape of the friction block (402) is annular, and the cross-sectional shape of the cavity is circular.

4. A safety speed governor for an elevator according to claim 3, characterized in that: The cooling component (3) comprises a fixed box (302), one side of the fixed box (302) is fixedly connected to one side of the fixed block (401), a liquid capsule (303) is fixedly connected to the top of the inner wall of the fixed box (302), an extrusion plate (308) is fixedly connected to the bottom of the liquid capsule (303), two sliding rods (307) are fixedly connected to the bottom of the extrusion plate (308), one end of the two sliding rods (307) extends to the outside of the fixed box (302) and is fixedly connected to a bonding plate (310), a cam (301) is bonded to the bottom of the bonding plate (310), the cam (301) is fixedly connected to the outer surface of the connecting shaft (404), a first spring (309) is sleeved on the outer surface of the sliding rod (307), and two ends of the first spring (309) are respectively fixedly connected to the bottom of the fixed box (302) and the top of the bonding plate (310).

5. The safety speed governor for an elevator according to claim 4, characterized in that: A nozzle (306) is fixedly connected to one side of the liquid capsule (303), one end of the nozzle (306) extends to the outside of the fixed box (302), a one-way liquid outlet valve is arranged inside the nozzle (306), a water storage tank (304) is fixedly connected to the top of the fixed block (401), one end of the liquid capsule (303) is fixedly connected to a connecting pipe (305), the other end of the connecting pipe (305) is connected to one side of the water storage tank (304), and a one-way liquid inlet valve is arranged inside the connecting pipe (305).

6. A safety speed governor for an elevator according to claim 5, characterized in that: A drive motor (6) is fixedly mounted on one side of the fixed plate (2) via a mounting plate, and a rotating shaft is fixedly connected to one side of the winding wheel (5), one end of the rotating shaft extends to one side of the fixed plate (2) and is fixedly connected to one end of the output shaft of the drive motor (6).

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