CN217920963U

CN217920963U - Screw mounting structure for platform ladder

Info

Publication number: CN217920963U
Application number: CN202222299004.7U
Authority: CN
Inventors: 杨隆; 胡汝林; 赵家乐
Original assignee: Eastern Elevators Pty Ltd
Current assignee: Eastern Elevators Pty Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-29
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a screw rod mounting structure for platform ladder, including fixing the auxiliary motor on the well mounting panel, the output of auxiliary motor passes through the lower extreme fixed connection of the fixed pipe of screw rod and screw rod, and the fixed pipe of screw rod sets up to big-end-up's toper pipe with the lower extreme complex part of screw rod, the position department that the screw rod is close to the upper end is provided with the bearing that can bear axial load, the bearing passes through the fixed establishment setting in the screw rod upper end. The lower end of the screw rod is provided with an auxiliary motor, when power is off, the auxiliary motor works to drive the screw rod to rotate, so that a driving nut on the screw rod drives the platform ladder to move downwards or downwards to a nearby floor together, and passengers in the platform ladder can conveniently get rid of difficulties; the upper end of the screw rod is provided with a bearing capable of bearing axial load, the lower end of the screw rod is connected with the auxiliary motor through the screw rod fixing pipe, and axial force generated when the platform ladder moves up and down can be offset, so that the screw rod can be effectively prevented from moving up and down.

Description

Screw mounting structure for platform ladder

Technical Field

The utility model belongs to the technical field of the elevator, concretely relates to a screw rod mounting structure for platform ladder.

Background

The screw elevator adopts a screw transmission mode, and a motor of the screw elevator drives a driving nut to move on a screw through a belt, so that the elevator is moved up and down. In the prior art, the lower end of the screw rod has two modes, one mode is directly suspended, the other mode is that the turning gear is installed at the lower end of the screw rod, and when power is off, the turning gear is driven manually, so that the screw rod elevator can reach nearby floors downwards, and passengers in the elevator can get out of the elevator conveniently. Because the jigger is operated at the bottom of the well manually, the operation is difficult, and professional personnel need to wait for the operation, so that the time for passengers to get out of the trouble is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses plan to provide a screw rod mounting structure for platform ladder is provided with auxiliary motor at the lower extreme of screw rod, and when having a power failure, auxiliary motor automatic work drives platform ladder and moves near floor downwards or rebound to the passenger of being convenient for is stranded.

Therefore, the utility model discloses the technical scheme who adopts does: the utility model provides a screw rod mounting structure for platform ladder, is including fixing the auxiliary motor on the well mounting panel, the output of auxiliary motor passes through the lower extreme fixed connection of the fixed pipe of screw rod and screw rod, and the fixed pipe of screw rod sets up to big-end-up's toper pipe with the lower extreme complex part of screw rod, the position department that the screw rod is close to the upper end is provided with the bearing that can bear axial load, the bearing passes through fixed establishment and sets up in the screw rod upper end.

Preferably, the fixing mechanism includes a fixing nut disposed at the upper end of the bearing, the fixing nut is connected to the upper end of the screw rod through threads, a tightening screw for preventing the fixing nut from coming off is disposed on a side surface of the fixing nut, the tightening screw penetrates through the fixing nut and then is tightened on the screw rod, the lower end of the bearing abuts against the upper end surface of the guide sleeve, and the guide sleeve is disposed on a mounting plate for the upper end of the screw rod to penetrate through.

Further preferably, threaded connection has drive nut on the screw rod, drive nut passes through actuating mechanism and drives it and reciprocate along the screw rod to realize the reciprocating of platform ladder.

Further preferably, actuating mechanism is including fixing the driving motor on the platform ladder, driving motor's output is provided with the action wheel, be provided with the hold-in range between the driving wheel outside drive nut with the suit.

The utility model has the advantages that: the lower end of the screw rod is provided with an auxiliary motor, when power is off, the auxiliary motor works to drive the screw rod to rotate, so that a driving nut on the screw rod drives the platform ladder to move downwards or downwards to a nearby floor together, and passengers in the platform ladder can conveniently get rid of difficulties; the upper end of the screw rod is provided with a bearing capable of bearing axial load, the lower end of the screw rod is connected with the auxiliary motor through the screw rod fixing pipe, and axial force generated when the platform ladder moves up and down can be offset, so that the screw rod can be effectively prevented from moving up and down.

Drawings

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

Detailed Description

The invention will be further described by the following examples in conjunction with the accompanying drawings:

as shown in fig. 1, a screw rod mounting structure for platform ladder, mainly by auxiliary motor 2, the fixed pipe 3 of screw rod, screw rod 4, bearing 5 and fixed establishment constitute, wherein auxiliary motor 2 is fixed to be set up on the well mounting panel 1 that is located the well bottom, auxiliary motor 2's output passes through the fixed pipe 3 of screw rod and the lower extreme fixed connection of screw rod 4, and the fixed pipe 3 of screw rod sets up to big-end-up's toper pipe with the lower extreme complex part of screw rod 4, be provided with the bearing 5 that can bear axial load in the position department that screw rod 4 is close to the upper end, the bearing passes through fixed establishment simultaneously and sets up in screw rod 4 upper end. Through the setting of the fixed pipe 3 of screw rod and bearing 5, can effectively offset the platform ladder and to the axial float that the screw rod produced when reciprocating. Preferably, a certain distance is left between the lower end of the screw rod 4 and the output end of the auxiliary motor 2, and the bearing 5 adopts a thrust ball bearing.

The specific structure of the fixing mechanism comprises a fixing nut 6 arranged at the upper end of the bearing 5, and the fixing nut 6 is in threaded connection with the upper end of the screw rod 4. In order to ensure that the fixing nut can rotate together with the screw rod, a jacking screw for preventing the fixing nut 6 from being separated is arranged on the side surface of the fixing nut 6, and the jacking screw penetrates through the fixing nut 6 and then jacks the screw rod 4 tightly. The lower end of the bearing 5 is propped against the upper end face of the guide sleeve 7, and the guide sleeve 7 is arranged on a mounting plate 8 for the upper end of the screw rod 4 to pass through. Preferably, the guide sleeve 7 is in soft contact with the screw 4, thereby reducing wear of the thread on the screw 4.

For realizing reciprocating of platform ladder, threaded connection has drive nut 9 on screw rod 4, and drive nut 9 drives it through actuating mechanism and reciprocates along screw rod 4, and actuating mechanism is fixed to be set up on the platform ladder.

The specific structure of the driving mechanism comprises a driving motor 10 fixed on the platform ladder, a driving wheel 11 is arranged at the output end of the driving motor 10, and a synchronous belt is arranged between the driving wheel 11 and a driven wheel 12 sleeved outside a driving nut 9.

In order to prevent the driving nut from sliding down due to thread abrasion or other reasons, the elevator cannot normally run, a safety nut is arranged below the driving nut through a connecting bolt, a groove is formed in the middle of the safety nut, a micro switch used for starting a safety system is arranged in the groove, a gap is reserved between the micro switch and the upper wall of the groove, when the driving nut slides down, the safety nut is driven to move down, the upper wall of the groove is in contact with the micro switch, the whole safety system is triggered, the safety system works, the safety nut moves up and down under the action of a driving motor, the elevator stops moving after moving to a nearby floor, a user trapped in the elevator can safely get out of the elevator, and then the elevator alarms to be maintained. The drive nut is located in the nut hole formed in the rack, a certain distance is reserved between the drive nut and the nut hole, namely, a gap is formed between the drive nut and the rack, so that the drive nut cannot be driven to move when moving downwards, and the micro switch is arranged on the rack through the micro switch support.

For preventing hold-in range fracture or locking device on the driving motor inefficacy, be provided with fixedly from driving wheel upper end and prevent from driving driven round pivoted band-type brake to through preventing from rotating from the driving wheel to prevent that the drive nut from rotating, and then prevent when the hold-in range fracture, the condition of gliding appears in the elevator. Preferably, a certain gap is left between the lower end faces of the driven wheel and the driving wheel and the upper end face of the rack, so that friction between the driven wheel and the driving wheel and the rack during rotation is prevented.

When the driving motor 10 works, the driving wheel can be driven to rotate, the driven wheel and the driving nut also rotate under the action of the synchronous belt, and the driving nut is in threaded connection with the screw rod, so that the driving nut can move up and down along the screw rod while rotating, and meanwhile, the driving mechanism and the platform ladder also move up and down along with the screw rod. When having a power failure, the work of auxiliary motor drives the screw rod and rotates under the effect of the fixed pipe of screw rod, because threaded connection has drive nut on the screw rod, consequently drive nut can reciprocate to drive the platform ladder and can reciprocate near floor, and then be convenient for stranded passenger's getting rid of poverty in the platform ladder, preferably, auxiliary motor drives the platform ladder and moves down.

Claims

1. The utility model provides a screw rod mounting structure for platform ladder which characterized in that: including fixing auxiliary motor (2) on well mounting panel (1), the output of auxiliary motor (2) passes through the lower extreme fixed connection of the fixed pipe of screw rod (3) and screw rod (4), and the fixed pipe of screw rod (3) sets up to big-end-up's toper pipe with the lower extreme complex part of screw rod (4), screw rod (4) are close to the position department of upper end and are provided with bearing (5) that can bear axial load, the bearing passes through fixed establishment and sets up in screw rod (4) upper end.

2. The screw mounting structure for a platform ladder according to claim 1, wherein: fixing mechanism is including setting up fixation nut (6) in bearing (5) upper end, adopt threaded connection between fixation nut (6) and screw rod (4) upper end, and be provided with the top tight screw that prevents fixation nut (6) and deviate from in fixation nut (6) side, top tight screw passes fixation nut (6) back top tightly on screw rod (4), the lower extreme of bearing (5) supports on the up end of uide bushing (7), uide bushing (7) set up on mounting panel (8) that supply screw rod (4) upper end to pass.

3. The screw mounting structure for a platform ladder according to claim 1, wherein: threaded connection has drive nut (9) on screw rod (4), drive nut (9) drive it through actuating mechanism and reciprocate along screw rod (4) to realize reciprocating of platform ladder.

4. The screw mounting structure for a platform ladder according to claim 3, wherein: actuating mechanism is including fixing driving motor (10) on the platform ladder, the output of driving motor (10) is provided with action wheel (11), be provided with the hold-in range between action wheel (11) and the driven wheel (12) of suit outside drive nut (9).