CN212798268U

CN212798268U - Automatic belt tensioning device of elevator

Info

Publication number: CN212798268U
Application number: CN202021206401.XU
Authority: CN
Inventors: 张福平
Original assignee: Changzhou Honghuan Machinery Co ltd
Current assignee: Changzhou Honghuan Machinery Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-03-26
Anticipated expiration: 2030-06-24

Abstract

The utility model provides an automatic belt tensioning device of a hoisting machine, which comprises a tail casing, a tail wheel shaft and two sliding plates, wherein the two sliding plates are connected on two sides of the tail casing in a sliding way, the tail wheel shaft is erected and fixed between the two sliding plates through a bearing with a seat, the automatic belt tensioning device also comprises two groups of tensioning assemblies corresponding to the sliding plates, each tensioning assembly comprises a motor, an adjusting screw rod, a sliding frame, a fixed frame and a spring, the motor is arranged on the tail casing, and the rotating shaft end of the motor is connected with the adjusting screw rod; the sliding frame is connected to the sliding plate in a sliding mode, and a nut block which can be in threaded connection with the adjusting screw rod is fixed on the sliding frame; the mount is fixed on the slide, and adjusting screw passes nut piece, carriage and mount in order, and the spring housing is established outside adjusting screw, and its both ends link to each other in mount and carriage respectively, the bottom side of carriage still be equipped with can be used to detect with the distance sensor of distance between the mount, the utility model discloses simple structure not only can realize the automatically regulated tensioning, and also can keep the tensile force stable.

Description

Automatic belt tensioning device of elevator

Technical Field

The utility model relates to a overspeed device tensioner, especially an automatic overspeed device tensioner of lifting machine belt.

Background

After the bucket elevator is installed and operated for a period of time, the belt of the elevator can be lengthened under the action of long-time tension, so that the belt is loosened, and the belt is easy to deviate; the deviation alarm device of present lifting machine installation, or can not realize automatic correction, reports to the police when the deviation tightly, and then notifies the staff to adjust, or only can be in once time automatic adjustment back, also make tension reduce simultaneously for the tailwheel is easy to take place to rock, so stability worsens.

Therefore, an automatic belt tensioning device of a hoisting machine, which has a simple structure, can realize automatic tensioning adjustment and can keep the tensioning force stable, is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lifting machine belt automatic take-up device, simple structure not only can realize the automatically regulated tensioning, and also can keep the tensile force stable.

The utility model provides a following technical scheme:

an automatic belt tensioning device of a hoisting machine comprises a tail machine shell, a tail wheel shaft and two sliding plates, wherein the two sliding plates are connected to two sides of the tail machine shell in a sliding mode, the tail wheel shaft is erected and fixed between the two sliding plates through a bearing with a seat, the automatic belt tensioning device also comprises two tensioning assemblies corresponding to the sliding plates, each tensioning assembly comprises a motor, an adjusting screw rod, a sliding frame, a fixing frame and a spring, the motor is arranged on the tail machine shell, and the rotating shaft end of the motor is connected with the adjusting screw rod; the sliding frame is connected to the sliding plate in a sliding mode, and a nut block which can be in threaded connection with the adjusting screw rod is fixed on the sliding frame; the mount is fixed on the slide, and adjusting screw passes nut piece, carriage and mount in order, and the spring housing is established outside adjusting screw, and its both ends link to each other in mount and carriage respectively, the bottom side of carriage still be equipped with can be used to detect with the distance sensor of distance between the mount.

Furthermore, the bottom of adjusting screw is equipped with the optical axis section, and the optical axis section tip of wearing out the mount still is connected with a stopper.

Further, pass through threaded connection between optical axis section and the stopper, and the top of stopper still is equipped with the displacement sensor that can be used to detect the distance between mount and the stopper.

Further, still include ultrasonic ranging appearance, ultrasonic ranging appearance installs on the afterbody casing, and can be used to detect the casing endotheca and establish the belt distance on the tailwheel.

Furthermore, the ultrasonic distance measuring device also comprises a controller, wherein the controller is electrically connected with the displacement sensor, the distance sensor, the motor and the ultrasonic distance measuring instrument.

Preferably, the tail casing is further provided with an auxiliary frame which can be limited outside the adjusting screw rod in an auxiliary mode.

The utility model has the advantages that: after the tail wheel shaft is installed on the sliding plate, the sliding plate can be lifted through the lifting, the belt is sleeved outside the tail wheel after the fixing frame penetrates through the adjusting screw rod, the belt can provide a lifting driving force for the tail wheel when rotating, the adjusting screw rod can be rotated through the motor, the sliding frame can slide downwards to compress the spring, the tail wheel shaft and the tail wheel can be jacked, the tensioning force is given, the upward movement of the belt is avoided, the distance between the fixing frame and the sliding frame at the moment is recorded and is used as a set value of the distance sensor, when the belt is loosened, the spring can drive the tail wheel to move downwards until new balance is achieved, but the distance sensor can detect the change of the distance, the rotation of the adjusting screw rod can be controlled, the sliding frame is driven to move downwards again until the distance between the adjusting screw rod and the fixing frame returns to the set.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

notation in the figure: the ultrasonic ranging device comprises a tail shell 1, a sliding plate 2, a base shaft 3, a motor 4, an adjusting screw 5, a sliding frame 6, a fixing frame 7, a spring 8, a nut block 9, a distance sensor 10, a belt 11, a limiting block 12, a displacement sensor 13, an ultrasonic range finder 14 and an auxiliary frame 15.

Detailed Description

As shown in fig. 1, a schematic structural diagram of an automatic belt tensioner of a hoist includes a tail housing 1, a tail pulley shaft, and two sliding plates 2, wherein the two sliding plates 2 are slidably connected to two sides of the tail housing 1, and the tail pulley shaft is fixed between the two sliding plates 2 by a bearing 3 with a seat; the tail part machine shell is characterized by also comprising two groups of tensioning assemblies corresponding to the sliding plate 2, wherein each group of tensioning assembly comprises a motor 4, an adjusting screw 5, a sliding frame 6, a fixed frame 7 and a spring 8, the motor 4 is arranged on the tail part machine shell 1, and the rotating shaft end of the motor is connected with the adjusting screw 5; the sliding frame 6 is connected on the sliding plate 2 in a sliding way, and a nut block 9 which can be in threaded connection with the adjusting screw 5 is fixed on the sliding frame; the fixed frame 7 is fixed on the sliding plate 2, the adjusting screw 5 sequentially passes through the nut block 9, the sliding frame 6 and the fixed frame 7, the spring 8 is sleeved outside the adjusting screw 5, two ends of the spring are respectively connected with the fixed frame 7 and the sliding frame 6, and the bottom side of the sliding frame 6 is also provided with a distance sensor 10 which can be used for detecting the distance between the spring and the fixed frame 7; in order to avoid the phenomenon that when the belt 11 is sleeved and installed, the tail wheel shaft drives the sliding plate 2 to slide downwards for too long distance relative to the adjusting screw 5, so that the spring 8 is stretched too much, and the effect of the spring 8 is caused, after the optical axis section of the adjusting screw 5 penetrates out of the fixing frame 7, a limiting block 12 can be connected, so that the limiting of the relative position of the sliding plate 2 and the adjusting screw 5 is realized through the abutting of the limiting block 12 and the fixing frame 7 on the sliding plate 2 before the spring 8 is stretched too much; in order to realize height adjustment and disassembly and replacement of the limiting block 12, the optical axis section and the limiting block 12 can be connected through threads, and meanwhile, in order to detect that the tensile degree of the belt 11 reaches a certain degree (namely, the belt 11 needs to be replaced when the tensile length is reached), a displacement sensor 13 which can be used for detecting the distance between the fixing frame 7 and the limiting block 12 can be arranged at the top of the limiting block 12, namely, when the belt 11 is loosened, the sliding plate 2 continuously slides downwards in order to match the tensile force of the loosened belt 11 until the sliding plate slides to the position where the fixing plate is abutted to the limiting block 12, and at the moment, after the displacement sensor 13 detects the position, a worker can be prompted to replace and maintain the belt 11, so that quantitative data can be provided for replacement of the belt 11; in order to provide more accurate data of belt 11 deviation and timely find belt 11 deviation possibly caused by other reasons, the distance of belt 11 sleeved on a tail wheel in the machine shell can be detected by an ultrasonic distance meter 14 arranged on the tail machine shell 1, namely when belt 11 is loose, but the tension distance between the fixed frame 7 and the sliding frame 6 reaches a set distance, so that belt 11 deviation possibly caused by other reasons can be guessed; in order to achieve comprehensive automatic control, the controller can be electrically connected with the displacement sensor 13, the distance sensor 10, the motor 4 and the ultrasonic range finder 14, so that after the belt 11 moves for a long time and is stretched, the spring 8 can push out the sliding plate 2 through the fixing frame 7, the sliding plate 2 moves downwards until the balance between the elastic force and the tension is achieved again, the displacement detected by the distance sensor 10 is increased, the controller can control the motor 4 to drive the adjusting screw 5 to rotate, the sliding frame 6 is driven to compress the spring 8 until the distance between the sliding frame 6 and the fixing frame 7 keeps a set value again, the tension can reach an original set value at the moment, therefore, the process is continuously circulated until the distance detected by the displacement sensor 13 is zero, the belt 11 is stretched to a replaceable length at the moment, the maintenance of a worker is reminded, and in order to enable the movement of the adjusting screw 5 to be more, an auxiliary frame 15 which can be limited outside the adjusting screw 5 in an auxiliary way can be additionally arranged on the tail machine shell 1.

The utility model discloses a theory of operation is: after the tail wheel shaft is arranged on the sliding plate 2, the sliding plate 2 can be lifted, the belt 11 is sleeved outside the tail wheel after the fixing frame 7 passes through the adjusting screw 5, because the belt 11 can provide a lifting driving force for the tail wheel when rotating, the adjusting screw 5 can be rotated by the motor 4, the sliding frame 6 can slide downwards to compress the spring 8, the tail wheel shaft and the tail wheel can be pressed to provide a tensioning force for the tail wheel to avoid moving upwards, the distance between the fixing frame 7 and the sliding frame 6 at the moment is recorded as a set value of the distance sensor 10, when the belt 11 is loosened, the spring 8 can drive the tail wheel to move downwards until reaching a new balance, but the distance sensor 10 can detect the change of the distance, so that the rotation of the adjusting screw 5 can be controlled to drive the sliding frame 6 to move downwards again until the distance between the sliding frame and the fixing frame 7 returns to the set value, and the automatic, and also to keep the tension force stable.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic belt tensioning device of a hoisting machine comprises a tail machine shell, a tail wheel shaft and sliding plates, wherein two groups of sliding plates are connected to two sides of the tail machine shell in a sliding mode, and the tail wheel shaft is erected and fixed between the two groups of sliding plates through a bearing with a seat; the sliding frame is connected to the sliding plate in a sliding mode, and a nut block which can be in threaded connection with the adjusting screw rod is fixed on the sliding frame; the fixed frame is fixed on the sliding plate, the adjusting screw penetrates through the nut block, the sliding frame and the fixed frame in sequence, the spring is sleeved outside the adjusting screw, and two ends of the spring are connected with the fixed frame and the sliding frame respectively; and a distance sensor which can be used for detecting the distance between the sliding rack and the fixed rack is also arranged at the bottom side of the sliding rack.

2. The automatic belt tensioning device for the elevator as claimed in claim 1, wherein the bottom end of the adjusting screw is provided with a light axis section, and the end of the light axis section penetrating out of the fixing frame is further connected with a limiting block.

3. The automatic belt tensioning device for the hoisting machine as claimed in claim 2, wherein the smooth shaft section is connected with the limiting block through a thread, and a displacement sensor for detecting the distance between the fixing frame and the limiting block is further arranged at the top of the limiting block.

4. The automatic belt tensioning device for the hoisting machine as recited in claim 3, further comprising an ultrasonic distance meter installed on the tail housing and adapted to detect a distance between the belt inside the housing and the tail pulley.

5. The automatic belt tensioner as claimed in claim 4, further comprising a controller electrically connected to the displacement sensor, the distance sensor, the motor and the ultrasonic distance meter.

6. The automatic belt tensioner as claimed in claim 1, wherein the tail housing further comprises an auxiliary frame for assisting the position limiting outside the adjusting screw.