CN211283384U - Toe guard device for lift car - Google Patents

Abstract

The utility model discloses a car toe guard device, including fixed toe guard and with fixed toe guard sliding connection's activity toe guard still includes: the rack is fixedly arranged on the fixed toe guard or the movable toe guard, and the corresponding gear is rotatably arranged on the movable toe guard or the fixed toe guard; and the driving mechanism drives the gear to rotate to drive the movable toe guard to move up and down. The utility model provides a car toe guard device is applicable to shallow pit elevator well, can realize automatic flexible function, and intensity is high, and is not fragile, has satisfied the requirement of relevant standard during the use, has improved the security of elevator.

Description

Toe guard device for lift car

Technical Field

The utility model relates to an elevator technical field, concretely relates to car toe guard device.

Background

The elevator car toe guard is installed in the below of car sill for receive the injury of shearing force after preventing maintainer or passenger mistake to get into the well, the vertical height of car toe guard is the important factor of guaranteeing personnel's safety, requires in national standard GB7588-2003 that the vertical height of car toe guard is not less than 750 mm. The traditional car toe guard is generally fixed at the bottom of the car sill and is installed in a fixed and immovable manner. In practical use, especially when being applied to the additional installation of an elevator, the traditional car toe guard is easy to interfere with a pit after entering the pit. Because when installing the elevator additional to old building, the elevator pit depth is because of facilities such as ground bottom pipeline are limited, generally adopts shallow bottom pit shaft structure, consequently can't hold traditional car toe guard.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that prior art exists, the utility model provides a car toe guard device is applicable to shallow pit elevator well, can realize automatic flexible function, and intensity is high, and is not fragile, has satisfied the requirement of relevant standard during the use, has improved the security of elevator.

The utility model discloses a following technical scheme realizes: the utility model provides a car toe guard device, including fixed toe guard and with fixed toe guard sliding connection's activity toe guard still includes: the rack is fixedly arranged on the fixed toe guard or the movable toe guard, and the corresponding gear is rotatably arranged on the movable toe guard or the fixed toe guard; and the driving mechanism drives the gear to rotate to drive the movable toe guard to move up and down.

The utility model discloses car toe guard device is when elevator car business turn over pit flat bed, and accessible gear, rack and actuating mechanism drive activity toe guard reciprocate, realize the automatic flexible of car toe guard device, satisfy the requirement to car toe guard height in the national standard GB7588-2003 during the expansion, can place into shallow pit after the shrink in, structural design is exquisite, and stability is high.

Further, the driving mechanism includes: a rotating shaft which is rotatably arranged on the movable toe guard or the fixed toe guard and drives the gear to synchronously rotate, wherein the end part of the rotating shaft is fixedly provided with a roller; the driving mechanism also comprises a rolling plate fixedly arranged for rolling the roller so as to drive the rotation of the gear. Furthermore, shaft sleeves are fixed on two sides of the foot protection plate provided with the gears, the rotating shaft is rotatably arranged on the foot protection plate through the two shaft sleeves, the stress on two sides of the rotating shaft is uniform, and the synchronous gear rotation on two sides of the rotating shaft can be realized.

Furthermore, the rotating shaft is in key connection with the gear, knurling is pressed at the end part of the rotating shaft, the roller is sleeved on the knurling, the gear and the roller are prevented from freely rotating, and the synchronous rotation of the roller, the gear and the rotating shaft is realized.

Furthermore, the roller is made of polyurethane, so that the friction force between the roller and the rolling plate can be increased, the shock resistance of the roller can be improved, and the influence of the lift car foot protection plate device on transmission parts such as a rotating shaft, a gear and a rack when the lift car foot protection plate device is subjected to shock or lateral force is reduced.

Furthermore, sliding sleeves are arranged on two sides of the fixed toe guard, sliding grooves extending along the length direction of the sliding sleeves are formed in the sliding sleeves, and sliding blocks matched with the sliding grooves are arranged on two sides of the movable toe guard so that the movable toe guard can slide up and down in a telescopic mode relative to the fixed toe guard.

Furthermore, the sliding sleeve is provided with positioning grooves which are arranged along the length direction of the sliding sleeve and are provided with end sockets at two ends, the tops of two sides of the movable foot protection plate are fixedly provided with stop rods, and the end parts of the stop rods are clamped into the positioning grooves and slide along with the up-and-down sliding of the movable foot protection plate so as to keep the expansion state of the movable foot protection plate and limit the excessive contraction of the movable foot protection plate.

Furthermore, fixed toeguard both sides and activity toeguard both sides all are equipped with the board of bending, sliding sleeve and slider set up respectively on corresponding toeguard board of bending, can reduce the deformation of car toeguard device both sides when receiving external force.

Furthermore, the two sets of racks and the two sets of gears are respectively arranged on two sides of the corresponding foot protection plates so as to realize synchronous up-and-down sliding of two sides of the movable foot protection plates and avoid unbalance loading or jamming of the movable foot protection plates in the sliding process.

Furthermore, a safety detection switch for detecting whether the movable toe guard is in an unfolded state or not is arranged at the bottom of one side of the fixed toe guard.

The utility model provides a car toe guard device has following beneficial effect: the automatic stretching of car toe guard device can be realized when elevator car discrepancy pit flat bed, need not electrical equipment, and is with low costs, and stability is good, not only accords with the basic requirement of elevator car toe guard, has still satisfied the shallow pit requirement, avoids striking the pit and causes the damage to car toe guard device.

Drawings

Fig. 1 is a schematic structural view of the car toe guard device of the present invention when deployed;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

fig. 4 is a schematic structural view of the car toe guard device of the present invention when retracted;

FIG. 5 is an enlarged view at C of FIG. 4;

FIG. 6 is an enlarged view of FIG. 4 at D;

fig. 7 is a schematic view of a part of the structure of the car toe guard device when the stop rod and the safety detection switch contact arm act (the sliding sleeve and the rack structure are omitted).

In the figure: 1. fixing a toe guard; 1a, bending a plate; 2. a movable toe guard; 2a, bending a plate; 2b, horizontally bending the plate; 3. a support; 4. a rotating shaft; 5. a sliding sleeve; 5a, a chute; 5b, positioning grooves; 6. rolling plates; 7. a drum; 8. a shaft sleeve; 9. a gear; 10. a stopper rod; 11. a safety detection switch; 11a, a safety detection switch contact arm; 12. a rack; 13 slide block.

Detailed Description

The following further describes a specific embodiment of the car toe guard device of the present invention with reference to the accompanying drawings.

As shown in fig. 1 to 6, a car toe guard device includes a fixed toe guard 1 and a movable toe guard 2 slidably connected to the fixed toe guard 1, and further includes: the rack 12 is fixedly arranged on the fixed toe guard 1 or the movable toe guard 2, and the corresponding gear 9 is rotatably arranged on the movable toe guard 2 or the fixed toe guard 1; and a driving mechanism for driving the gear 9 to rotate to drive the movable toe guard 2 to move up and down. The rack 12 in this embodiment is fixedly mounted on the movable toe guard 2, and the corresponding gear 9 is rotatably mounted on the fixed toe guard 1. As shown in fig. 2, 3, 5 and 6, fixed toe guard 1 both sides and activity toe guard 2 both sides in this embodiment all are equipped with the board of bending, can reduce the deformation of car toe guard device both sides when receiving external force, and fixed toe guard 1 cover is established in the activity toe guard 2 outside, and the inner wall of fixed toe guard two bending plate 1a is fixed with rectangular shape sliding sleeve 5, is equipped with in the sliding sleeve 5 along the spout 5a of its length direction extension, and sliding sleeve 5 passes through the mounting hole in the spout 5a and is connected fixedly with fixed toe guard bending plate 1 a.

The rack 12 and the gear 9 in this embodiment are provided with two sets, and are respectively arranged on two sides of the corresponding foot protection plate, so that the gear 9 drives the rack 12 to move, and the movable foot protection plate 2 can realize telescopic movement, and in addition, the two sides of the movable foot protection plate 2 can synchronously slide up and down, thereby avoiding the occurrence of unbalance loading or jamming of the movable foot protection plate 2 in the sliding process. Two racks 12 are respectively arranged on the outer walls of the two bending plates 2a of the movable toe guard, and a sliding block 13 matched with the sliding groove 5a is fixed at the position of the side surface of each rack 12 opposite to the sliding groove 5a so as to realize the smooth sliding of the movable toe guard 2. The sliding sleeve 5 and the sliding block 13 can also enhance the side strength of the fixed toe guard 1 and the movable toe guard 2, and effectively prevent the side surfaces of the two toe guards from deforming due to external impact. The sliding groove 5a in this embodiment is a dovetail groove, which can ensure that the sliding block 13 can slide smoothly in the sliding groove 5a, is not easy to derail, has strong stability, and can adopt a T-shaped groove.

The sliding sleeve 5 is provided with a positioning groove 5b which is arranged along the length direction of the sliding sleeve and is provided with end sockets at two ends, the tops of the two bending plates 2a of the movable foot protection plate are fixedly provided with a stop rod 10, the stop rod 10 penetrates through the bending plates 2a of the movable foot protection plate and the rack 12, and the end part of the stop rod is clamped in the positioning groove 5b to slide along with the up-and-down sliding of the movable foot protection plate 2.

As shown in fig. 3 and 7, a safety detection switch 11 for detecting whether the car toe guard device is in an unfolded state is provided at the bottom of the bent plate 1a on the side of the fixed toe guard, and a contact arm 11a of the safety detection switch extends into the positioning groove 5b, and when the movable toe guard 2 is completely unfolded relative to the fixed toe guard 1, the operation is triggered by the end of the stop lever 10.

The positioning groove 5b and the stop rod 10 are arranged to keep the movable toe guard 2 in the unfolded state and limit the movable toe guard 2 from being excessively contracted, and provide a space and an action mechanism for triggering the safety detection switch 11.

As shown in fig. 3 and 6, the drive mechanism in the present embodiment includes: the rotating shaft 4 is rotatably arranged on the fixed toe guard 1 and drives the gear 9 to synchronously rotate, and the end part of the rotating shaft 4 is fixedly provided with a roller 7; the drive mechanism further comprises a roller plate 6 fixedly mounted in the pit for rolling of the rollers 7 to drive rotation of the gear 9.

The rolling plates 6 are of bending structures and are mounted on the support 3 arranged in the pit through bolts. The bottom of the sliding sleeve 5 at two sides of the fixed toe guard 1 is provided with a shaft sleeve 8, and the rotating shaft 4 is rotatably arranged on the fixed toe guard 1 through the two shaft sleeves 8. The rotating shaft 4 is in key connection with the gear 9, a knurl is pressed at one end of the rotating shaft 4, the roller 7 is sleeved on the knurl, the gear 9 and the roller 7 are prevented from freely rotating, and the synchronous rotation of the roller 7, the gear 9 and the rotating shaft 4 is realized. According to actual conditions, the two end parts of the rotating shaft 4 can be provided with the rollers 7 and the rolling plates 6 matched with the rollers 7, so that the friction force for driving the gear 9 to rotate is increased, the forces on the two sides of the rotating shaft 4 are balanced, and the phenomenon that the movable toe guard 2 is blocked due to uneven stress in the up-and-down sliding process is avoided. The roller 7 is made of polyurethane materials, so that the friction force between the roller 7 and the rolling plates 6 can be increased, the shock resistance of the roller 7 can be improved, and the influence of the car toe guard device on the transmission parts such as the rotating shaft 4, the gear 9 and the rack 12 when the car toe guard device is subjected to shock or lateral force is reduced.

As shown in fig. 1 and 4, the bottom of the movable toe guard 2 in this embodiment is further provided with a horizontal bending plate 2b to enhance the protection effect on the body of the pit maintainer or the passenger who enters the pit by mistake, and reduce the injury.

The working principle of the car toe guard device of the utility model is that the car toe guard device is in a fully expanded state when the elevator car normally moves up and down so as to protect the personal safety of maintainers and passengers; in the process that the elevator car descends to the pit flat layer, the movable toe guard 2 slides and ascends relative to the fixed toe guard 1 until the car toe guard device is completely folded; in the process of ascending and running of the elevator car from the bottom pit flat layer, the movable toe guard 2 slides and descends relative to the fixed toe guard 1 until the car toe guard device is completely unfolded. As shown in fig. 1-6:

when the elevator goes down and the car toe guard device enters a pit, the roller 7 positioned on one side of the fixed toe guard 1 is in contact pressure with the top of the rolling plate 6 in the pit and rolls down to drive the rotating shaft 4 and the gear 9 fixed on the rotating shaft 4 to rotate, the gear 9 rotates to drive the rack 12 to move upwards, and the movable toe guard 2 fixedly connected with the rack 12 slides and rises in the sliding groove 5a of the fixed toe guard 1 through the sliding blocks 13 on the two sides. Meanwhile, the stop rods 10 positioned at the tops of the two sides of the movable toe guard 2 slide upwards in the positioning grooves 5b along with the rising of the movable toe guard 2, the end parts of the stop rods 10 are separated from the contact arms 11a of the safety detection switch in the sliding process, at the moment, the elevator enters a pit running mode, and the elevator can still descend. The movable toe guard 2 slides and rises relative to the fixed toe guard 1 until the elevator car reaches a pit flat layer and stops descending, the roller 7 runs to the bottom of the rolling plate 6, the stop rod 10 slides to the upper end cover of the positioning groove 5b to prevent the movable toe guard 2 from excessively contracting, the movable toe guard 2 rises to be overlapped with the fixed toe guard 1, at the moment, the car toe guard device completely contracts, and the height of the whole car toe guard device is the shortest. The static friction force between the roller 7 and the rolling plate 6 is larger than or equal to the gravity of the movable toe guard 2 and the racks 12 at the two sides, so that the fully contracted state of the lift car toe guard device can be maintained.

When the elevator car starts to move upwards from the flat floor of the pit, the roller 7 positioned on one side of the fixed toe guard 1 rolls upwards along the rolling plate 6 along with the upward movement of the elevator to drive the rotating shaft 4 and the gear 9 fixed on the rotating shaft 4 to rotate, the gear 9 drives the rack 12 to move downwards after rotating, and the movable toe guard 2 fixedly connected with the rack 12 slides and descends in the sliding groove 5a through the sliding blocks 13 on the two sides. Meanwhile, the stop rods 10 positioned at the tops of the two sides of the movable toe guard 2 slide downwards in the positioning grooves 5b along with the descending of the movable toe guard 2 until the end parts of the stop rods 10 act with the contact arms 11a of the safety detection switch to connect an elevator safety loop, and at the moment, the elevator enters a normal operation mode and can normally run up and down. At the moment, the roller 7 runs to the top of the rolling plate 6, the stop rod 10 slides to the lower end socket of the positioning groove 5b, the car toe guard device is completely unfolded, and the height of the whole car toe guard device is longest. The elevator continues to move upwards, the roller 7 is separated from the rolling plate 6, the end part of the stop rod 10 is clamped at the bottom of the positioning groove 5b, and meanwhile, the movable toe guard 2 is hung at the bottom of the fixed toe guard 1 under the action of gravity, so that the fully unfolded state of the car toe guard device is maintained.

When the maintenance personnel enters the pit for maintenance when the elevator breaks down, once the elevator accidentally goes downwards to cause the condition that the car toe guard device touches the maintenance personnel, the movable toe guard 2 is jacked up immediately because a certain reaction force is given by the personnel to the movable toe guard 2, meanwhile, the end part of the stop rod 10 is prevented from being separated from the contact arm 11a of the safety detection switch, the safety loop is disconnected, and the elevator enters a maintenance mode and cannot run up and down. Therefore the utility model discloses car toe guard device can effectively prevent further deepening of incident, reduces the injury to the maintainer.

In addition, rack fixed mounting is on fixed toe guard, and corresponding gear revolve installs do on movable toe guard the utility model discloses another embodiment of car toe guard device, movable toe guard both sides top is fixed with the axle sleeve in this embodiment, passes through the diaxon cover with gear synchronous pivoted pivot and rotates to install on movable toe guard, and movable toe guard is through fixing the roll realization between epaxial cylinder of commentaries on classics and the roll board and slide from top to bottom.

The utility model discloses car toe guard device can realize automatic flexible function through gear, rack and drive arrangement's cooperation, need not electrical equipment, and is with low costs, and stability is good. The car toe guard device conforms to the regulation of the height of the toe guard in the national standard GB7588-2003 when being completely unfolded, can be placed in a shallow pit when being completely folded, avoids interference with the shallow pit, and is high in safety.

Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. The utility model provides a car toe guard device, including fixed toe guard and with fixed toe guard sliding connection's activity toe guard, its characterized in that still includes: the rack is fixedly arranged on the fixed toe guard or the movable toe guard, and the corresponding gear is rotatably arranged on the movable toe guard or the fixed toe guard; and the driving mechanism drives the gear to rotate to drive the movable toe guard to move up and down.

2. A car toe guard apparatus as claimed in claim 1, wherein the drive mechanism comprises: a rotating shaft which is rotatably arranged on the movable toe guard or the fixed toe guard and drives the gear to synchronously rotate, wherein the end part of the rotating shaft is fixedly provided with a roller; the driving mechanism also comprises a rolling plate fixedly arranged for rolling the roller so as to drive the rotation of the gear.

3. A car toe guard apparatus as claimed in claim 2, wherein shaft sleeves are fixed to both sides of the toe guard on which the gear is mounted, and the rotary shaft is rotatably mounted on the toe guard through the two shaft sleeves.

4. The car toe guard device according to claim 2, wherein the rotating shaft is connected with the gear in a key mode, knurling is pressed on the end portion of the rotating shaft, and the roller is sleeved on the knurling so as to achieve synchronous rotation of the roller, the gear and the rotating shaft.

5. A car toe guard arrangement as claimed in claim 2 or 4, wherein the roller is of polyurethane material.

6. The car toe guard device of claim 1, wherein sliding sleeves are provided on both sides of the fixed toe guard, sliding grooves extending in a longitudinal direction of the sliding sleeves are provided in the sliding sleeves, and sliding blocks which are engaged with the sliding grooves are provided on both sides of the movable toe guard.

7. The car toe guard device according to claim 6, wherein the sliding sleeve is provided with positioning grooves which are arranged along the length direction of the sliding sleeve and are provided with end sockets at two ends, the tops of two sides of the movable toe guard are fixedly provided with stop rods, and the end parts of the stop rods are clamped into the positioning grooves and slide along with the up-and-down sliding of the movable toe guard.

8. The car toe guard device of claim 6, wherein the fixed toe guard is provided with a bending plate on both sides thereof and the movable toe guard is provided with a bending plate on both sides thereof, and the sliding sleeve and the sliding block are respectively provided on the corresponding bending plates of the toe guard.

9. A car toe guard apparatus as claimed in claim 1, wherein there are two sets of rack and pinion, one on each side of the corresponding toe guard.

10. The car toe guard device according to claim 1, wherein a safety detection switch for detecting whether the movable toe guard is in the extended state is provided at a bottom portion of one side of the fixed toe guard.

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