CN114348822A

CN114348822A - Safety protection device for elevator maintenance

Info

Publication number: CN114348822A
Application number: CN202111524232.3A
Authority: CN
Inventors: 吴勇
Original assignee: Special Equipment Safety Supervision Inspection Institute of Jiangsu Province
Current assignee: Special Equipment Safety Supervision Inspection Institute of Jiangsu Province
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-15
Anticipated expiration: 2041-12-14
Also published as: CN114348822B

Abstract

The invention discloses a safety protection device for elevator maintenance, and relates to the technical field of elevator maintenance. Including the car, lead boots, there is the guardrail car top through elevating system swing joint, the car top is provided with urgent pull-back mechanism, the car left and right sides all is provided with arrestment mechanism, arrestment mechanism includes first rack and second rack, first rack lower extreme, second rack lower extreme has all meshed first gear, first gear coaxial coupling has first pivot, first gear engagement has the second gear, second gear coaxial coupling has the second pivot, second gear engagement has the third rack, third rack end connection has the briquetting, the briquetting cover is equipped with the ejecting, be provided with the spring between briquetting and the ejecting. The elevator car brake device realizes stable brake of the car through the brake mechanism, improves the stability of the car in the maintenance process of maintenance personnel, prevents the car from slipping and abnormally dropping, and improves the safety guarantee of the maintenance personnel in the maintenance process.

Description

Safety protection device for elevator maintenance

Technical Field

The invention belongs to the technical field of elevator maintenance, and particularly relates to a safety protection device for elevator maintenance.

Background

The main function of the guide system of an elevator is to restrict the freedom of movement of the car and counterweight so that they can only move up and down along the guide rails. The guide system mainly comprises a guide rail, a guide shoe and a guide rail frame. When the elevator overhauls, the maintenance personnel often need carry out the operation at the car top, have the danger that maintenance personal fell into the well and the risk that the car promptly fell when the operation of top.

The invention discloses a safety protection device for elevator maintenance, which comprises a speed limiter rack, a fixed block, a rotating shaft, an overspeed switch, a speed limiter wheel disc, a pendulum shaft, a buffer spring, a rope pressing block support and a fixed shaft, wherein the speed limiter wheel disc is fixedly arranged in the speed limiter rack, the fixed block is fixedly welded at the top of the front end of the speed limiter rack, the rotating shaft penetrates through the fixed block and the speed limiter rack and is embedded with the speed limiter wheel disc, and the rotating shaft is collinear with the axle center of the speed limiter wheel disc. This technical scheme has improved the elevator overspeed governor, consolidates to the weak department of overspeed governor rigidity, has improved the bulk strength.

The technical scheme also has the following problems: the device just consolidates the weak department to the overspeed governor and handles, can not effectual maintenance personal carry out safety protection, and the protection effect is poor, and is functional single.

Disclosure of Invention

The invention provides a safety protection device for elevator maintenance, aiming at the problems, and solving the problems of poor protection effect and insufficient functions of the conventional safety protection device on maintenance personnel.

The technical scheme for solving the technical problems is as follows: the elevator safety protection device comprises a car and guide shoes, wherein the left side and the right side of the car are both connected with the guide shoes, the top of the car is movably connected with guardrails through a lifting mechanism, the top of the car is provided with an emergency pull-back mechanism, the left side and the right side of the car are both provided with braking mechanisms, the two braking mechanisms are symmetrically arranged, each braking mechanism comprises a first rack and a second rack, the upper ends of the first rack and the second rack are both connected with the guardrails, the first racks and the second racks are arranged in parallel, the lower ends of the first racks and the lower ends of the second racks are both meshed with a first gear, the first gear is coaxially connected with a first rotating shaft, one end of the first rotating shaft is connected with the side wall of the car, the first gear is meshed with a second gear, the second gear is coaxially connected with a second rotating shaft, one end of the second rotating shaft is connected with the side wall of the car, the second gear is meshed with a third rack, the third rack passes through connecting piece and car lateral wall swing joint, third rack end connection has the briquetting, the briquetting cover is equipped with the ejecting, briquetting and ejecting sliding connection, be provided with the spring between briquetting and the ejecting.

Further, urgent pullback mechanism includes drum and axis of rotation, around being equipped with the stay cord on the drum, axis of rotation one end and drum coaxial coupling, the car top is connected with a supporting bench, the axis of rotation other end runs through supporting bench back cover and is equipped with the third gear, the axis of rotation rotates with a supporting bench and is connected, third gear engagement has the fourth gear, install first motor on the supporting bench, the output shaft and the fourth gear coaxial coupling of first motor, the mounting groove has been seted up to the axis of rotation, there is the fastener through torsional spring connection in the mounting groove, a supporting bench has seted up the draw-in groove, the draw-in groove is located axis of rotation and a supporting bench junction, be provided with trigger switch in the draw-in groove, trigger switch and fastener swing joint, trigger switch is connected with first motor electricity.

Further, elevating system includes the drive wheel group that second motor and symmetry set up, the second motor is installed in the car top, the drive wheel group includes the head rod, the equal eccentric articulated drive runner that has in connecting rod both ends, two drive runner symmetries set up, the drive runner passes through first support piece and is connected with the car top, the drive runner rotates with first support piece to be connected, and two equal eccentric articulated drive runners have first push rod, and two first push rod symmetries set up, and two first push rod upper ends all are articulated with the guardrail, the output shaft and one of them drive runner coaxial coupling of second motor.

Further, the top of the car is connected with a guide sleeve, a guide rod is inserted into the guide sleeve, the guide rod is connected with the guide sleeve in a sliding mode, and the upper end of the guide rod is connected with the guardrail.

Further, car top symmetry is provided with the cooperation wheelset, the cooperation wheelset includes second connecting rod and a plurality of cooperation runner, and a plurality of cooperation runners are eccentric articulated with the second connecting rod respectively, and a plurality of cooperation runner arrays set up, and the cooperation runner passes through second support piece to be connected with the car top, and the cooperation runner rotates with second support piece to be connected, and a plurality of cooperation runners all eccentric articulates there is the second push rod, and a plurality of second push rod arrays set up, and a plurality of second push rod upper ends all are articulated with the guardrail.

Furthermore, a guide piece is fixedly connected to the support platform, and the pull rope is connected with the guide piece in a sliding mode.

The invention has the beneficial effects that:

(1) the elevator car brake device realizes stable brake of the elevator car through the arranged brake mechanism, improves the stability of the elevator car in the maintenance process of maintenance personnel, prevents the elevator car from slipping and abnormally dropping, and improves the safety guarantee of the maintenance personnel in the maintenance process.

(2) The emergency pull-back mechanism can rescue maintenance personnel who are stepped on and slide down, and can pull the maintenance personnel who accidentally drop to the top of the lift car, so that a key extra guarantee is provided for the maintenance personnel, and the functions of the device are increased.

(3) The safety factor of maintenance personnel at the top of the lift car is improved through the arranged guardrail, the guardrail can be lifted through the lifting mechanism during maintenance, the falling probability is reduced, and the safety is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the braking mechanism of the present invention.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is a first perspective view of the emergency pullback mechanism of the present invention.

Fig. 5 is a second perspective view of the emergency pullback mechanism of the present invention.

Fig. 6 is an enlarged view at B in fig. 5.

Fig. 7 is a third perspective view of the emergency pullback mechanism of the present invention.

Fig. 8 is an enlarged view at C in fig. 7.

FIG. 9 is a schematic view of the cooperating wheel sets of the present invention.

Reference numerals: 1. a car; 2. a guide shoe; 3. a lifting mechanism; 31. a second motor; 32. a driving wheel set; 321. a first connecting rod; 322. driving the rotating wheel; 323. a first support member; 324. a first push rod; 4. a guardrail; 5. an emergency pullback mechanism; 51. wire coils; 52. a rotating shaft; 53. pulling a rope; 54. a support table; 55. a third gear; 56. a fourth gear; 57. a first motor; 58. mounting grooves; 59. a torsion spring; 510. a fastener; 511. a card slot; 512. a trigger switch; 6. a brake mechanism; 61. a first rack; 62. a second rack; 63. a first gear; 64. a first rotating shaft; 65. a second gear; 66. a second rotating shaft; 67. a third rack; 68. a connecting member; 69. briquetting; 610. a top piece; 611. a spring; 7. a guide sleeve; 8. a guide bar; 9. matching wheel sets; 91. a second connecting rod; 92. matching with a rotating wheel; 93. a second support member; 94. a second push rod; 10. a guide member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 and fig. 2, the elevator comprises a car 1 and guide shoes 2, the guide shoes 2 are connected to the left and right sides of the car 1, the guide shoes 2 are parts that the elevator car 1 must have and cooperate with a car 1 guide rail inside an elevator shaft to provide a guiding function for the up-and-down movement of the elevator car 1, a guardrail 4 is movably connected to the top of the car 1 through a lifting mechanism 3, the lifting mechanism 3 is arranged to realize the lifting of the guardrail 4, an emergency pull-back mechanism 5 is arranged on the top of the car 1, the emergency pull-back mechanism 5 is arranged to provide additional safety guarantee for maintenance personnel, braking mechanisms 6 are arranged on the left and right sides of the car 1, a braking mode is added to the braking mechanisms 6, the stability and safety of the car 1 are improved during maintenance operation, the car 1 is prevented from slipping or abnormally falling, the two braking mechanisms 6 are symmetrically arranged, the braking mechanisms 6 comprise a first rack 61 and a second rack 62, the upper end of the first rack 61 and the upper end of the second rack 62 are both connected with the guardrail 4, the first rack 61 and the second rack 62 are arranged in parallel, the lower end of the first rack 61 and the lower end of the second rack 62 are both engaged with a first gear 63, the first gear 63 is coaxially connected with a first rotating shaft 64, one end of the first rotating shaft 64 is connected with the side wall of the car 1, the first gear 63 is engaged with a second gear 65, the second gear 65 is coaxially connected with a second rotating shaft 66, one end of the second rotating shaft 66 is connected with the side wall of the car 1, the second gear 65 is engaged with a third rack 67, the third rack 67 is movably connected with the side wall of the car 1 through a connecting piece 68, as shown in figure 3, the end part of the third rack 67 is connected with a pressing block 69, the pressing block 69 is sleeved with a top piece 610, the pressing block 69 is slidably connected with the top piece 610, the guardrail 4 is linked through the arranged first rack 61, the second rack 62, the first gear 63 and the second gear 65 after ascending, drive two tops 610 and move towards two 1 guide rails of car with one side for two tops 610 and 1 guide rail contact of car have good frictional force between top 610 and the 1 guide rail of car, and then for car 1 provides stability, prevent skidding of car 1, the security when promoting the maintenance personal operation needs the explanation: the braking mechanism 6 in this embodiment is suitable for an elevator having two car 1 guide rails on one side, the top member 610 needs to be pushed against the two car 1 guide rails on the same side to achieve braking, the upward movement amount of the first push rod 324 is enough to provide a horizontal movement amount for the top member 610, so that the top member 610 is stably abutted against the car 1 guide rails, a spring 611 is arranged between the pressing block 69 and the top member 610, and the arranged spring 611 enables a certain buffering effect to be provided between the top member 610 and the car 1 guide rails.

As shown in fig. 4 and 5, the emergency retraction mechanism 5 includes a wire coil 51 and a rotating shaft 52, a pull rope 53 is wound on the wire coil 51, the end of the pull rope 53 is connected with a hook, the hook is an existing safety rope hook, the hook is connected with a safety rope at the waist of a maintenance worker, one end of the rotating shaft 52 is coaxially connected with the wire coil 51, the top of the car 1 is connected with a support table 54, as shown in fig. 6 and 7, a third gear 55 is sleeved on the other end of the rotating shaft 52 after penetrating through the support table 54, the rotating shaft 52 is rotatably connected with the support table 54, the third gear 55 is engaged with a fourth gear 56, a first motor 57 is mounted on the support table 54, an output shaft of the first motor 57 is coaxially connected with the fourth gear 56, an installation groove 58 is formed on the rotating shaft 52, as shown in fig. 8, a clamping member 510 is connected in the installation groove 58 through a torsion spring 59, the support table 54 is formed with a clamping groove 511, the clamping groove 511 is located at the connection position of the rotating shaft 52 and the support table 54, be provided with trigger switch 512 in the draw-in groove 511, trigger switch 512 and fastener 510 swing joint, trigger switch 512 is connected with first motor 57 electricity, the condition that the maintenance personal stepped on the sky or dropped appears, stay cord 53 pulling drum 51 that sets up rotates the back, axis of rotation 52 rotates, and then make fastener 510 bounce into in the draw-in groove 511 because the effect of torsional spring 59, the first motor 57 of control rotates after trigger switch 512 that sets up is pressed down by fastener 510, first motor 57 drives fourth gear 56 and rotates, and then drive third gear 55 and axis of rotation 52 and rotate, realize the shrink of stay cord 53 on drum 51, pull up the maintenance personal and implement the rescue, the urgent mechanism 5 that draws back that sets up has increased the security of the device.

As shown in fig. 9, the lifting mechanism 3 includes a second motor 31 and driving wheel sets 32 symmetrically arranged, the second motor 31 is installed on the top of the car 1, the driving wheel set 32 includes a first connecting rod 321, two ends of the connecting rod are eccentrically hinged with driving wheels 322, the two driving wheels 322 are symmetrically arranged, the driving wheels 322 are connected with the top of the car 1 through first supporting members 323, the driving wheels 322 are rotatably connected with the first supporting members 323, the two driving wheels 322 are eccentrically hinged with first push rods 324, the two first push rods 324 are symmetrically arranged, upper ends of the two first push rods 324 are hinged with the guard rail 4, an output shaft of the second motor 31 is coaxially connected with one of the driving wheels 322, the arranged second motor 31 drives the driving wheel 322 connected therewith to rotate, so that the two driving rotations are synchronously rotated by the action of the first connecting rod 321, and the first push rod 324 is arranged to push the guardrail 4 to move upwards.

As shown in fig. 9, the top of the car 1 is connected with a guide sleeve 7, a guide rod 8 is inserted into the guide sleeve 7, the guide rod 8 is slidably connected with the guide sleeve 7, the upper end of the guide rod 8 is connected with the guardrail 4, and the guide rod 8 and the guide sleeve 7 are arranged to improve the stability of the guardrail 4 in the lifting process.

As shown in the figure, the top symmetry of car 1 is provided with cooperation wheelset 9, cooperation wheelset 9 includes second connecting rod 91 and a plurality of cooperation runner 92, the quantity of every group cooperation runner 92 is three in this embodiment, have two sets of totally, a plurality of cooperation runners 92 are eccentric articulated with second connecting rod 91 respectively, a plurality of cooperation runner 92 array settings, cooperation runner 92 is connected with car 1 top through second support piece 93, cooperation runner 92 rotates with second support piece 93 to be connected, a plurality of cooperation runners 92 all eccentric hinges have second push rod 94, a plurality of second push rod 94 array settings, a plurality of second push rod 94 upper ends all articulate with guardrail 4. The working principle of the cooperating wheel set 9 is similar to that of the driving wheel set 32, the cooperating wheel set 32 realizes stable lifting operation of the guardrail 4, the cooperating wheel 92 cooperates with the driving wheel 322, and the second push rod 94 cooperates with the first push rod 324 to ensure synchronous movement.

As shown in fig. 1 and 4, the guide 10 is fixedly connected to the support base 54, and the pull rope 53 is slidably connected to the guide 10. The guide 10 that sets up can provide good direction and fixed action for stay cord 53, when the rolling of stay cord 53, can roll up on drum 51 smoothly, prevents to tie a knot in disorder, and guide 10 adopts the pulley in this embodiment, and stay cord 53 passes through the pulley location, and the pulley plays fixed and the effect of direction.

The working principle of the embodiment is as follows: when a maintenance person works on the top of the car 1, firstly, the pull rope 53 is connected with a safety rope of the maintenance person through the hook, the second motor 31 is operated to drive the driving wheel 322 connected with the second motor to rotate, the driving wheel 322 drives the other driving wheel 322 on the same side to synchronously move through the first connecting rod 321, the two driving wheels 322 drive the first push rod 324 connected with the two driving wheels to move, the first push rod 324 swings accordingly, meanwhile, the guardrail 4 is linked with the second push rod 94 to drive the matching wheels 92 to rotate, the guide rod 8 slides in the guide sleeve 7 to realize the stable rising of the guardrail 4, at the moment, the guardrail 4 drives the first rack 61 and the second rack 62 to move upwards, the first gear 63 which is in movable engagement with the first rack 61 and the second rack 62 to move upwards, the first gear 63 drives the second gear 65 to rotate when rotating, the second gear 65 rotates to drive the third rack 67 to move, and then make the top 610 and car 1 guide rail butt, spring 611 is in the compression state this moment, and two arrestment mechanisms 6 of left and right sides all realize braking operation, promote the stability of car 1, and after top 610 and car 1 guide rail stabilize the butt, second motor 31 locks.

In the maintenance process, if take place during the maintenance personal steps on the condition such as smooth or drop, maintenance personal's safety rope pulling stay cord 53, make stay cord 53 release a segment on the carousel, later stay cord 53 is in the state of straining and drives drum 51 and rotate, drum 51 drives axis of rotation 52 at the pivoted in-process and rotates, axis of rotation 52 rotates the back, fastener 510 in mounting groove 58 plays the joint in draw-in groove 511 because torsional spring 59's effect, fastener 510 presses trigger switch 512 in the draw-in groove 511, first motor 57 begins to rotate and passes through fourth gear 56, third gear 55 drives axis of rotation 52 reversal, realize pulling up of stay cord 53, pull up maintenance personal, realize rescue operation.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. The utility model provides an elevator overhauls uses safety arrangement, includes car (1), leads boots (2), its characterized in that: the elevator car is characterized in that the left side and the right side of the car (1) are both connected with guide shoes (2), the top of the car (1) is movably connected with guardrails (4) through lifting mechanisms (3), the top of the car (1) is provided with an emergency pull-back mechanism (5), the left side and the right side of the car (1) are both provided with brake mechanisms (6), the two brake mechanisms (6) are symmetrically arranged, each brake mechanism (6) comprises a first rack (61) and a second rack (62), the upper end of the first rack (61) and the upper end of the second rack (62) are both connected with the guardrails (4), the first rack (61) and the second rack (62) are arranged in parallel, the lower end of the first rack (61) is meshed with a first gear (63), the first gear (63) is coaxially connected with a first rotating shaft (64), one end of the first rotating shaft (64) is connected with the side wall of the car (1), first gear (63) meshing has second gear (65), second gear (65) coaxial coupling has second pivot (66), second pivot (66) one end is connected with car (1) lateral wall, second gear (65) meshing has third rack (67), third rack (67) are through connecting piece (68) and car (1) lateral wall swing joint, third rack (67) end connection has briquetting (69), briquetting (69) cover is equipped with kicking piece (610), briquetting (69) and kicking piece (610) sliding connection, be provided with spring (611) between briquetting (69) and kicking piece (610).

2. The safety protection device for elevator maintenance according to claim 1, characterized in that: urgent mechanism (5) of pulling back includes drum (51) and axis of rotation (52), drum (51) is gone up around being equipped with stay cord (53), axis of rotation (52) one end and drum (51) coaxial coupling, car (1) top is connected with brace table (54), the cover is equipped with third gear (55) after the axis of rotation (52) other end runs through brace table (54), axis of rotation (52) rotate with brace table (54) and are connected, third gear (55) meshing has fourth gear (56), install first motor (57) on brace table (54), the output shaft and the fourth gear (56) coaxial coupling of first motor (57), mounting groove (58) have been seted up in axis of rotation (52), be connected with fastener (510) through torsional spring (59) in mounting groove (58), draw-in groove (511) have been seted up in brace table (54), the clamping groove (511) is located at the connecting position of the rotating shaft (52) and the supporting table (54), a trigger switch (512) is arranged in the clamping groove (511), the trigger switch (512) is movably connected with the clamping piece (510), and the trigger switch (512) is electrically connected with the first motor (57).

3. The safety protection device for elevator maintenance according to claim 1, the lifting mechanism (3) comprises a second motor (31) and symmetrically arranged driving wheel sets (32), the second motor (31) is arranged at the top of the cage (1), the driving wheel set (32) comprises a first connecting rod (321), two ends of the connecting rod are eccentrically hinged with driving rotating wheels (322), the two driving rotating wheels (322) are symmetrically arranged, the driving wheel (322) is connected with the top of the cage (1) through a first supporting piece (323), the driving rotating wheels (322) are rotatably connected with the first supporting part (323), the two driving rotating wheels (322) are eccentrically hinged with first push rods (324), the two first push rods (324) are symmetrically arranged, the upper ends of the two first push rods (324) are hinged with the guardrail (4), the output shaft of the second motor (31) is coaxially connected with one of the driving rotating wheels (322).

4. The safety protection device for elevator maintenance according to claim 1, characterized in that a guide sleeve (7) is connected to the top of the car (1), a guide rod (8) is inserted into the guide sleeve (7), the guide rod (8) is slidably connected with the guide sleeve (7), and the upper end of the guide rod (8) is connected with the guardrail (4).

5. The safety protection device for elevator maintenance according to claim 1, wherein the top of the car (1) is symmetrically provided with a matching wheel set (9), the matching wheel set (9) comprises a second connecting rod (91) and a plurality of matching wheels (92), the plurality of matching wheels (92) are eccentrically hinged to the second connecting rod (91) respectively, the plurality of matching wheels (92) are arranged in an array mode, the matching wheels (92) are connected with the top of the car (1) through a second supporting piece (93), the matching wheels (92) are rotatably connected with the second supporting piece (93), the plurality of matching wheels (92) are eccentrically hinged to second push rods (94), the plurality of second push rods (94) are arranged in an array mode, and the upper ends of the plurality of second push rods (94) are hinged to the guardrail (4).

6. An elevator service safety protection device as defined in claim 2, wherein a guide member (10) is fixedly connected to the support platform (54), and the pull rope (53) is slidably connected to the guide member (10).