CN214298787U - Protection device for preventing rope belt from breaking for elevator - Google Patents
Protection device for preventing rope belt from breaking for elevator Download PDFInfo
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- CN214298787U CN214298787U CN202023335238.XU CN202023335238U CN214298787U CN 214298787 U CN214298787 U CN 214298787U CN 202023335238 U CN202023335238 U CN 202023335238U CN 214298787 U CN214298787 U CN 214298787U
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Abstract
Lifting machine prevent weighing down fag end fracture protection device, adopt the slip subassembly with the linkage of lifting platform, promote the brake pads extrusion to the fixed part surface of lifting machine one side immediately when hoist and mount work piece descends unusually, through producing self gravity that lasts stable friction power in order to offset hoist and mount platform and work piece, with work piece load-bearing platform locking on fixed part to realize preventing weighing down braking effect fast accurately, improve the flexibility that protection device reset and debugs simultaneously effectively. The protection device comprises a braking platform connected with the bearing platform and a hoisting support connected with the hoisting rope belt; the braking platform is provided with two groups of fixedly installed sliding block bases and movably connected braking sliding blocks, a spring sleeve is connected between the sliding block bases and the braking sliding blocks, and a braking spring is arranged in the spring sleeve.
Description
Technical Field
The utility model relates to a be applied to rope belt fracture detection device in stereoscopic warehouse lifting machine lift operation in-process belongs to logistics storage technical field.
Background
At present, in conveying equipment in the logistics storage industry, a lifting machine is generally used for lifting or lowering a tray, a cargo carrying platform and other devices from one working height to another working height, so that the vertical warehouse is assisted to finish warehousing and ex-warehouse of materials, layer changing operation and maintenance of a trolley and the like.
In the process of high-altitude operation of equipment, a certain probability of abnormal risks of a lifting mechanism exist along with common lifting scenes of the equipment and workpieces, such as abnormal falling caused by breakage of a lifting rope. To protect the life safety of ground operators and the hung workpieces from damage, it is necessary to provide safe and reliable protection against such risks.
If the domestic patent of the applicant previously filed for application number 202010434668.2, the method for detecting the lifting operation and the belt breakage of the elevator adopts a transmission detection mode of synchronous rotation detection with a motor driving shaft so as to realize the monitoring treatment of the belt breakage and other abnormal lifting states. The lifting belt connected with the cargo carrying platform is driven by a servo motor to lift in the whole process to circularly bypass a driving module, a steering module and a direction changing module to form a closed-loop running track; the actual lifting travel distance of the cargo carrying platform is calculated and used as a basis for judging whether the lifting belt is broken or not by calculating and comparing frequency feedback signals output by the encoder and output signals of the servo motor.
According to the detection device and the detection method provided by the prior art, the actual stroke ratio between the lifting belt and the motor driving shaft is obtained through the monitoring of the steering shaft which synchronously runs with the motor driving shaft, so that the actual running speed of lifting equipment such as a cargo carrying platform is reflected, the judgment of whether the rope belt is broken completely depends on the automatic processes of detection, receiving and calculation of equipment running data, and once a relevant detection part is in a problem or is subjected to generation and calculation of accidental interference signals such as electromagnetic radiation, the accuracy and the instantaneity of a judgment result are directly caused.
Therefore, it is still necessary to adopt a mechanical trigger protection device of an immediate action type to take a protection measure in a broken state of the rope belt at the first time so as to effectively prevent the occurrence of danger.
In view of this, the present patent application is specifically proposed.
SUMMERY OF THE UTILITY MODEL
Lifting machine prevent weighing down fag end fracture protection device, lie in solving the problem that above-mentioned prior art exists and adopt and promote the sliding component that the platform links, promote the brake pads extrusion to the fixed part surface of lifting machine one side immediately when hoist and mount work piece unusual descending, through producing the self gravity of lasting stable friction power in order to offset hoist and mount platform and work piece, with work piece load-bearing platform locking on fixed part to realize preventing weighing down braking effect fast accurately, improve the flexibility that protection device reset and debugs simultaneously effectively.
In order to achieve the design purpose, the anti-falling rope belt breakage protection device for the elevator mainly comprises a brake platform connected with a bearing platform and a hoisting support connected with a hoisting rope belt; the braking platform is provided with two groups of fixedly installed sliding block bases and movably connected braking sliding blocks, a spring sleeve is connected between the sliding block bases and the braking sliding blocks, and a braking spring is arranged in the spring sleeve.
In an initial state, a certain distance is kept between the brake sliding block and the fixed frame body; a brake sliding block pressing rod and a nut are arranged on the outer side of the sliding block base far away from the fixing frame body, and the brake sliding block pressing rod and the nut are extruded at the end part of the brake spring from outside to inside;
the brake platform is connected with the hoisting support through a lever and a sliding block locking pull rod, and the sliding block locking pull rod penetrates through and is inserted into a sliding block locking pull rod nut sleeve, the brake platform and the brake sliding block from the bottom in sequence; and a slide block locking pull rod spring is sleeved between the slide block locking pull rod nut sleeve and the slide block locking pull rod in the braking platform, and is extruded at the bottom of the braking slide block.
Furthermore, an inclined ratchet plate and a ratchet wheel in meshed connection with sawteeth at the front end of the ratchet plate are arranged on the braking platform; a ratchet plate pressure rod penetrates through the sliding block base in the vertical direction, a ratchet plate nut sleeve is arranged at the top end of the ratchet plate pressure rod, and the ratchet plate nut sleeve is screwed into the sliding block base; a ratchet plate pressure rod spring is sleeved inside the slider base and between the ratchet plate pressure rod and the ratchet plate nut sleeve; the ratchet plate pressure lever is pressed downwards on the ratchet plate.
Furthermore, two groups of ratchet plates and ratchets are arranged on the braking platform, and sawteeth of the two groups of ratchet plates and the ratchets are arranged in a staggered mode.
Furthermore, a long round through groove which penetrates through the brake sliding block in the vertical direction is formed in the brake sliding block, and a sliding block sleeve is inserted into the through groove from top to bottom; the bottom of the sliding block sleeve is extruded on the braking platform through a bolt and a gasket arranged at the top of the sliding block sleeve; in the vertical direction, the bolt and the washer keep a certain distance with the brake sliding block.
Furthermore, a reset pull rod penetrates between the slider base and the brake slider, and a reset pull rod nut sleeve is connected to the outer side of the slider base and the rod end of the reset pull rod.
Furthermore, the lever is connected to the lever bracket through a lever rotating shaft, one end of the lever is connected with the sliding block locking pull rod, the other end of the lever is sequentially connected with the hanging and pulling end pull rod chain and the hanging and pulling end pull rod, and the hanging and pulling end pull rod is connected with the hanging and pulling bracket.
In summary, the protection device for preventing the rope belt from breaking of the hoisting machine has the following advantages:
1. the whole structure adopts a modular design, and can be suitable for the anti-falling and rope belt fracture protection of various lifting devices;
2. the instant protection measure that the brake sliding block is released to move horizontally through the pin is adopted, the locking action response is rapid, the falling lifting equipment can be locked on the surface of the fixed part at the first time, and the protection effect is direct and accurate;
3. the slide block can be braked to rebound in a single direction by adopting a backspacing limit structure such as a ratchet plate, so that the locking effect is more reliable;
4. the elastic thrust assembly is adopted to realize locking transmission, and the locking force distributed on the surface of the fixed part is more uniform, continuous and stable.
5. When the equipment after the anti-falling locking protection is reinstalled and started, the braking sliding block can be simply and conveniently released through the reset pull rod, and the whole braking device has the characteristics of rapidness in assembling, disassembling, installing, replacing and maintaining.
Drawings
The invention will now be further described with reference to the following figures.
FIG. 1 is a schematic structural diagram of a device for protecting a hoist against breakage of a rope belt;
FIG. 2 is a side schematic view of FIG. 1;
FIG. 3 is a schematic rear view of FIG. 1;
FIG. 4 is a sectional view taken along line A-A of FIG. 2;
FIG. 5 is a sectional view taken along line B-B of FIG. 2;
FIG. 6 is a schematic view of FIG. 3 taken in the direction of C;
FIG. 7 is a cross-sectional view of the catch slide and slide bushing;
FIG. 8 is a schematic view of the initial state of the protection device;
FIG. 9 is a schematic view of the protection device in a broken state;
in the above drawings, a slider base 1, a lifting support 2, a brake slider 3, a spring sleeve 4, a return pull rod 5, a ratchet plate pressure rod 6, a ratchet plate nut sleeve 7, a brake slider pressure rod and nut 8, a return pull rod nut sleeve 9, a ratchet plate 10, a lifting end pull rod 11, a lifting end pull rod chain 12, a lever support 13, a lever 14, a lever rotating shaft 15, a slider locking pull rod 16, a slider locking pull rod nut sleeve 17, a slider sleeve 18, a ratchet 19, a brake spring 20, a slider locking pull rod spring 21, a ratchet plate pressure rod spring 22, a through groove 23, a bolt and a washer 24, a fixed frame body 100 and a brake platform 200.
Detailed Description
The protection device for preventing the breakage of the lifting rope belt comprises a braking platform 200 connected with a bearing platform (not shown in the figure) and a hoisting support 2 connected with the lifting rope belt;
two groups of fixedly installed sliding block bases 1 and movably connected braking sliding blocks 3 are arranged on the braking platform 200, a spring sleeve 4 is connected between the sliding block bases 1 and the braking sliding blocks 3, and a braking spring 20 is arranged inside the spring sleeve 4; in the initial state, the distance between the brake sliding block 3 and the fixed frame body 100 is kept between 5mm and 10 mm.
A brake slider pressing rod and a nut 8 are arranged on the outer side of the slider base 1 far away from the fixing frame body 100, and the brake slider pressing rod and the nut 8 are extruded at the end part of the brake spring 20 from outside to inside; the preset compression amount of the brake spring 20 can be adjusted by adjusting the brake slide block pressure rod and the nut 8;
the brake platform 200 is connected with the hoisting support 2 through a lever 14 and a slide block locking pull rod 16, and the slide block locking pull rod 16 is inserted into a slide block locking pull rod nut sleeve 17, the brake platform 200 and the brake slide block 3 in sequence from the bottom; a slide block locking pull rod spring 21 is sleeved between the slide block locking pull rod nut sleeve 17 and the slide block locking pull rod 16 in the braking platform 200, and the slide block locking pull rod spring 21 is extruded at the bottom of the braking slide block 3. The pressure of the slide block locking pull rod spring 21 is adjusted by the slide block locking pull rod nut sleeve 17, the slide block locking pull rod nut sleeve 17 can keep enough downward space of the slide block locking pull rod 16, and the slide block locking pull rod 16 can be completely separated from the bottom slotted hole of the braking slide block 3.
In the normal work process of hoisting the workpiece by the hoister, the brake platform 200 and the hoisting support 2 are in a relatively balanced and static stress state through the lever 14. At this time, the slider locking tie bar 16 is stably inserted into the bottom of the drag slider 3 under the elastic restriction of the slider locking tie bar nut sleeve 17 and the slider locking tie bar spring 21 to restrict the drag slider 3 from moving along the drag platform 200.
Because the brake sliding block 3 is still, the brake spring 20 inside the spring sleeve 4 between the sliding block base 1 and the brake sliding block 3 is in a compressed state, so as to store energy for driving the brake sliding block 3 to move subsequently.
When a steel wire rope, a chain, a lifting belt and the like for hanging and lifting a workpiece are broken or damaged or a bearing platform descends at an overspeed, the original force balance state of the lever 14 is broken, the slider locking pull rod 16 is stressed to be separated from the bottom of the brake slider 3 under the combined action of the self gravity of the lever 14 and the slider locking pull rod spring 21, and the brake slider 3 is only under the pressure action of the brake spring 20 in the spring sleeve 4 and moves along the brake platform 200 until being extruded on the surface of the fixed frame body 100. The friction force of the braking sliding block 3 locked on the surface of the fixed frame body 100 is used for offsetting the gravity of the bearing platform and the lifted goods, so that the reliable braking locking under the abnormal falling state is realized.
Further, in order to prevent that brake slider 3 from pressing the surface of fixing frame body 100, brake spring 20 receives the reaction force of fixing frame body 100 and leads to brake slider 3 to kick-back, the design of the anti-rollback structure of following ratchet is proposed in this application:
the brake platform 200 is provided with an inclined ratchet plate 10 and a ratchet 19 which is engaged with the saw teeth at the front end of the ratchet plate 10; a ratchet plate pressure rod 6 penetrates through the sliding block base 1 in the vertical direction, a ratchet plate nut sleeve 7 is arranged at the top end of the ratchet plate pressure rod 6, and the ratchet plate nut sleeve 7 is screwed into the sliding block base 1; a ratchet plate pressure rod spring 22 is sleeved inside the slider base 1 and between the ratchet plate pressure rod 6 and the ratchet plate nut sleeve 7; the ratchet plate pressure bar 6 presses down on the ratchet plate 10. The compression of the ratchet plate strut spring 22 can be adjusted by adjusting the screwing position of the ratchet plate nut sleeve 7, and the ratchet plate strut 6 stably applies downward pressure to the ratchet plate 10.
When the brake slider 3 moves, the inclination of the ratchet plate 10 changes, the energy storage of the ratchet plate pressure rod spring 22 is released, and the brake slider 3 is prevented from backing due to the locking action between the ratchet plate 10 and the ratchet 19, i.e. the brake slider 3 can only be continuously pressed on the surface of the fixed frame body 100, thereby further limiting the stable maintenance of the locked state of the brake slider 3.
In order to improve the accuracy of locking the brake slider 3, two sets of ratchet plates 10 and ratchets 19 may be disposed on the brake platform 200, and the teeth of the two sets of ratchet plates 10 and ratchets 19 are staggered (for example, by half tooth positions), so that the two sets of ratchets lock alternately, the stopping distance of the brake slider 3 is shorter, and the locking force of the brake slider 3 on the fixing frame 100 is improved.
Further, in order to reduce the obstruction of the brake sliding block 3 in the moving process on the brake platform 200 and improve the instant brake reaction speed under abnormal conditions, a vertically-penetrated long circular through groove 23 is arranged on the brake sliding block 3, and the sliding block sleeve 18 is inserted into the through groove 23 from top to bottom; the bottom of the slide sleeve 18 is pressed against the brake platform 200 by the bolt and washer 24 provided on the top of the slide sleeve 18; the bolt and washer 24 are vertically spaced from the catch slide 3 by a distance of about 2-5 mm.
During the movement of the brake slider 3 on the brake platform 200, the slider sleeve 18 is stationary, and the guide and limit of the movement of the brake slider 3 are provided by the relative displacement between the oblong through groove 23 and the slider sleeve 18, and the brake slider 3 can only be pushed forward under the thrust of the brake spring 20 and directly pressed on the surface of the fixed frame 100.
Further, after the abnormal situation such as rope breakage is resolved and disposed, the protection device needs to be reset to continue the lifting operation. In order to improve the rapid resetting after the braking locking and reduce the difficulty of releasing the locking state, a resetting pull rod 5 can be connected between the fixedly installed slide block base 1 and the movably connected braking slide block 3 in a penetrating way.
The outer side of the sliding block base 1 and the rod end of the reset pull rod 5 are connected with a reset pull rod nut sleeve 9, and the brake sliding block 3 is pushed out or pulled back through the reset pull rod 5 by means of the positioning acting force of the sliding block base 1 through rotating the reset pull rod nut sleeve 9, so that the brake sliding block 3 is separated from the surface of the fixed frame body 100.
Further, in order to improve the stability of maintaining the balance state between the brake platform 200 and the hoist bracket 2 by the lever 14, sufficient kinetic energy is accumulated for the subsequent slider lock draw bar 16 to be released from the brake platform 200.
The lever 14 is connected to the lever bracket 13 through a lever rotating shaft 15, one end of the lever 14 is connected with a sliding block locking pull rod 16, the other end of the lever 14 is sequentially connected with a hanging and pulling end pull rod chain 12 and a hanging and pulling end pull rod 11, and the hanging and pulling end pull rod 11 is connected with the hanging and pulling bracket 2.
The suspension-pull support 2 is connected and installed on a lifting mechanism such as a steel wire rope, upward pulling force is applied to a suspension-pull point to adjust a nut on a suspension-pull end pull rod 11, so that a suspension-pull end pull rod chain 12 keeps a tensioning state, a lever 14 rotates around a lever rotating shaft 15 fixed on a lever support 13 until a horizontal state is achieved, and at the moment, a slider locking pull rod 16 is inserted into a slotted hole at the bottom of the brake slider 3 to prevent the brake slider 3 from horizontally moving.
When the rope belt is broken, the balance state of the lever 14 is broken, the hanging end pull rod 11, the hanging end pull rod chain 12 and the lever bracket 13 simultaneously drop, and the lever 14 rotates around the lever rotating shaft 15 to drive the slide block locking pull rod 16 to move downwards and be separated from the groove hole at the bottom of the brake slide block 3.
By applying the anti-falling rope belt fracture protection device for the elevator, the anti-falling rope belt fracture protection method for the elevator is realized at the same time.
As shown in fig. 8, during the initial and normal operation of the hoist, the brake platform 200 carrying the integrated protection device is connected to the hoist bracket 2 connected to the hoisting rope belt through the lever 14 and the slider locking pull rod 16, and the slider locking pull rod 16 is inserted into the brake slider 3 from the bottom to limit the movement thereof; the brake platform 200 is in a relatively balanced and static stressed condition with the drawframe 2.
As shown in fig. 9, when the lifting rope is broken or the load-bearing platform is damaged or descends at an excessive speed, under the combined action of the self-gravity of the lever 14 and the slider locking pull rod spring 21, the slider locking pull rod 16 is forced to be disengaged from the bottom of the braking slider 3, the braking slider 3 is forced by the braking spring 20 to move along the braking platform 200 until being pressed against the surface of the fixing frame body 100, and the friction force of the braking slider 3 locked on the surface of the fixing frame body 100 counteracts the self-gravity of the load-bearing platform and the lifted goods.
Further, the pressure of the slide block locking pull rod spring 21 is adjusted by the slide block locking pull rod nut sleeve 17, and the slide block locking pull rod nut sleeve 17 provides enough downward space for the slide block locking pull rod 16, so that the slide block locking pull rod 16 can be completely released from the bottom slotted hole of the brake slide block 3.
Further, an inclined ratchet plate 10 and a ratchet 19 in saw-tooth engagement with the front end of the ratchet plate 10 are arranged on the braking platform 200; a ratchet plate pressure rod 6 penetrates through the sliding block base 1 in the vertical direction, a ratchet plate nut sleeve 7 is arranged at the top end of the ratchet plate pressure rod 6, and the ratchet plate nut sleeve 7 is screwed into the sliding block base 1; a ratchet plate pressure rod spring 22 is sleeved inside the slider base 1 and between the ratchet plate pressure rod 6 and the ratchet plate nut sleeve 7; the ratchet plate pressure bar 6 presses down on the ratchet plate 10. The compression of the ratchet plate strut spring 22 can be adjusted by adjusting the screwing position of the ratchet plate nut sleeve 7, and the ratchet plate strut 6 stably applies downward pressure to the ratchet plate 10.
When the brake slider 3 moves, the inclination of the ratchet plate 10 changes, the energy storage of the ratchet plate pressure rod spring 22 is released, and the brake slider 3 is prevented from backing based on the locking action between the ratchet plate 10 and the ratchet 19, so as to further limit the stable maintenance of the locking state of the brake slider 3.
Furthermore, a long round through groove 23 which penetrates through the brake sliding block 3 in the vertical direction is formed, and the sliding block sleeve 18 is inserted into the through groove 23 from top to bottom; the bottom of the slide sleeve 18 is pressed against the brake platform 200 by the bolt and washer 24 provided on the top of the slide sleeve 18; the bolt and washer 24 are vertically spaced from the catch slide 3 by a distance of about 2-5 mm. During the movement of the drag slider 3 on the drag platform 200, the slider sleeve 18 is stationary, and the guide and limit of the movement of the drag slider 3 are provided by the relative displacement between the oblong through groove 23 and the slider sleeve 18.
Furthermore, a reset pull rod 5 is connected through the fixedly installed slide block base 1 and the movably connected brake slide block 3; the outer side of the slide block base 1 and the rod end of the reset pull rod 5 are connected with a reset pull rod nut sleeve 9.
By rotating the reset pull rod nut sleeve 9, the brake slider 3 is pushed out or pulled back through the reset pull rod 5 by means of the positioning acting force of the slider base 1, so that the brake slider 3 is separated from the surface of the fixed frame body 100.
Further, the hanging and pulling bracket 2 is connected and installed on a lifting mechanism such as a steel wire rope, an upward pulling force is applied at a hanging and pulling point to adjust a nut on the hanging and pulling end pull rod 11, so that the hanging and pulling end pull rod chain 12 is kept in a tensioning state, the lever 14 rotates around a lever rotating shaft 15 fixed on the lever bracket 13 until reaching a horizontal state, and at the moment, the slider locking pull rod 16 is inserted into a slotted hole at the bottom of the brake slider 3 to prevent the brake slider 3 from horizontally moving.
When the rope belt is broken, the balance state of the lever 14 is broken, the hanging end pull rod 11, the hanging end pull rod chain 12 and the lever bracket 13 simultaneously drop, and the lever 14 rotates around the lever rotating shaft 15 to drive the slide block locking pull rod 16 to move downwards and be separated from the groove hole at the bottom of the brake slide block 3.
As above, the embodiments given in connection with the drawings are only preferred for achieving the objects of the present invention. Those skilled in the art can now appreciate that other alternative configurations consistent with the present invention may be readily devised. Other structural features thus obtained are also intended to be within the scope of the present invention.
Claims (6)
1. The utility model provides a hoist prevents weighing down fag end fracture protection device which characterized in that: comprises a braking platform connected with a bearing platform and a hoisting bracket connected with a hoisting rope belt;
two groups of fixedly installed sliding block bases and movably connected braking sliding blocks are arranged on the braking platform, a spring sleeve is connected between the sliding block base and the braking sliding block, and a braking spring is arranged in the spring sleeve; in an initial state, a certain distance is kept between the brake sliding block and the fixed frame body;
a brake sliding block pressing rod and a nut are arranged on the outer side of the sliding block base far away from the fixing frame body, and the brake sliding block pressing rod and the nut are extruded at the end part of the brake spring from outside to inside;
the brake platform is connected with the hoisting support through a lever and a sliding block locking pull rod, and the sliding block locking pull rod penetrates through and is inserted into a sliding block locking pull rod nut sleeve, the brake platform and the brake sliding block from the bottom in sequence; and a slide block locking pull rod spring is sleeved between the slide block locking pull rod nut sleeve and the slide block locking pull rod in the braking platform, and is extruded at the bottom of the braking slide block.
2. The hoist anti-falling rope belt breakage protection device as claimed in claim 1, characterized in that: the brake platform is provided with an inclined ratchet plate and a ratchet wheel in meshing connection with sawteeth at the front end of the ratchet plate;
a ratchet plate pressure rod penetrates through the sliding block base in the vertical direction, a ratchet plate nut sleeve is arranged at the top end of the ratchet plate pressure rod, and the ratchet plate nut sleeve is screwed into the sliding block base; a ratchet plate pressure rod spring is sleeved inside the slider base and between the ratchet plate pressure rod and the ratchet plate nut sleeve; the ratchet plate pressure lever is pressed downwards on the ratchet plate.
3. The hoist anti-falling rope belt breakage protection device as claimed in claim 2, characterized in that: two groups of ratchet plates and ratchets are arranged on the braking platform, and the sawteeth of the two groups of ratchet plates and the ratchets are arranged in a staggered manner.
4. The hoist anti-falling rope belt breakage protection device as claimed in claim 3, characterized in that: a long circular through groove which penetrates through the brake sliding block in the vertical direction is formed in the brake sliding block, and a sliding block sleeve is inserted into the through groove from top to bottom; the bottom of the sliding block sleeve is extruded on the braking platform through a bolt and a gasket arranged at the top of the sliding block sleeve; in the vertical direction, the bolt and the washer keep a certain distance with the brake sliding block.
5. The hoist anti-falling rope belt breakage protection device as claimed in claim 4, characterized in that: a reset pull rod penetrates between the slider base and the brake slider, and a reset pull rod nut sleeve is connected to the outer side of the slider base and the rod end of the reset pull rod.
6. The hoist anti-falling rope belt breakage protection device as claimed in claim 5, characterized in that: the lever is connected to the lever support through a lever rotating shaft, one end of the lever is connected with the sliding block locking pull rod, the other end of the lever is sequentially connected with the hanging and pulling end pull rod chain and the hanging and pulling end pull rod, and the hanging and pulling end pull rod is connected with the hanging and pulling support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023335238.XU CN214298787U (en) | 2020-12-30 | 2020-12-30 | Protection device for preventing rope belt from breaking for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023335238.XU CN214298787U (en) | 2020-12-30 | 2020-12-30 | Protection device for preventing rope belt from breaking for elevator |
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| Publication Number | Publication Date |
|---|---|
| CN214298787U true CN214298787U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023335238.XU Active CN214298787U (en) | 2020-12-30 | 2020-12-30 | Protection device for preventing rope belt from breaking for elevator |
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| CN (1) | CN214298787U (en) |
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- 2020-12-30 CN CN202023335238.XU patent/CN214298787U/en active Active
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