CN217535287U - Double-limiting device for lifting height of crane - Google Patents
Double-limiting device for lifting height of crane Download PDFInfo
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- CN217535287U CN217535287U CN202221502173.XU CN202221502173U CN217535287U CN 217535287 U CN217535287 U CN 217535287U CN 202221502173 U CN202221502173 U CN 202221502173U CN 217535287 U CN217535287 U CN 217535287U
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Abstract
The utility model discloses a two stop device of hoist lifting height, two stop device of hoist lifting height including: a pulley structure and a limiting structure; the pulley structure comprises a shell, a winding drum, a steel wire rope, a rotating motor, a pulley, a lifting hook and a pulley protective cover; the limiting structure comprises a connecting plate, a fixed frame, a rotating frame, a primary bumper bar, a first limiting switch and a second limiting switch; the utility model has simple structure, can realize the lifting height limit of two different forms, and meets the requirement of double limit; the components are clear, so that inspection personnel can conveniently observe and inspect the lifting height limiting device; the application range is wide, and the device is particularly suitable for bridge cranes and gantry cranes; and meanwhile, the device also has the reset function.
Description
Technical Field
The utility model relates to a spacing technical field of hoist especially relates to a hoist rises to rise two stop device of height.
Background
The lifting height limiter is necessary to be arranged on the crane and is used for automatically cutting off a power source when the lifting hook lifts to a limit position. According to the ' notice of developing the hidden danger investigation and treatment work of the hoisting machinery in the office of the market supervision Bureau ' for special equipment ' accident statistics and reason analysis in recent years, in the use process of bridge cranes and gantry cranes, the proportion of accidents caused by reasons such as improper configuration, missing, damage and failure of height limiting devices is high. In order to further implement the safety main body responsibility of a production unit and a use unit of the hoisting machinery, reduce the occurrence of accidents and ensure the safe use of the hoisting machinery, the use unit of the hoisting machinery should additionally arrange a set of height limiting device which is different from the original configuration form on bridge type and gantry cranes for use, so as to ensure that the equipment meets the requirement of a double-limiting device.
The crane that uses adopts weight formula, clamp plate formula, formula of cutting off fire high stopper mostly, two liang of combinations form two stop devices of lifting height, and the stopper that unites two into one at present does not yet exist, and separately purchase the installation cost higher, sets up the precision simultaneously inadequately, and the action is not sensitive enough, hardly adjusts required limit height, observes difficulty etc. during the inspection of inspection personnel.
There is therefore a need for a dual hoist lift limiter to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a hoist lifting height double-limiting device, hoist lifting height double-limiting device is including: a pulley structure and a limiting structure;
the pulley structure comprises a shell, a winding drum, a steel wire rope, a rotating motor, a pulley, a lifting hook and a pulley protective cover;
the winding drum is rotationally arranged in the shell, the rotating motor is fixedly arranged on the shell, and the output end of the rotating motor is fixedly connected with the winding drum; the rotating motor is used for driving the winding drum to rotate; the outer side of the pulley is sleeved on the steel wire rope; the lifting hook is rotationally connected with the pulley; the pulley protective cover is covered above the pulley and is fixedly connected with the lifting hook;
the limiting structure comprises a connecting plate, a fixed frame, a rotating frame, a primary bumper bar, a first limiting switch, a second limiting switch and a spring;
one end of the steel wire rope is fixedly arranged on the connecting plate, and the other end of the steel wire rope is wound on the outer surface of the winding drum; the top of the fixed frame is fixedly connected with the connecting plate; the fixed frame is provided with a movable through hole; the rotating frame part is accommodated in the movable through hole, and the rotating frame is hinged with the fixed frame;
one end of the rotating frame is provided with a wire hole for accommodating a steel wire rope, a first-level collision rod and a first limit switch, and the other end of the rotating frame is provided with a second limit switch; one end of the primary collision rod is hinged with the rotating frame, and the other end of the primary collision rod is arranged between the pulley protective cover and the winding drum; the first limit switch is fixedly connected with the rotating frame and arranged above the first-stage collision rod; the second limit switch is fixedly arranged on the fixed frame, and the second limit switch is arranged below one end of the rotating frame; the spring is accommodated in the fixed frame, and one end of the spring is fixedly connected with the rotating frame, and the other end of the spring is fixedly connected with the bottom of the fixed frame.
Preferably, the hinged position of the rotating frame and the fixed frame is arranged between the spring and the second limit switch.
Preferably, the first limit switch and the second limit switch are both electrically connected with the rotating motor, and the first limit switch and the second limit switch are used for starting and stopping the rotating motor.
Preferably, the first limit switch and the second limit switch are both connected in series in a power circuit of the rotating motor; the first limit switch and the second limit switch are used for switching on and off a power supply of the rotating motor.
Preferably, the first limit switch and the second limit switch are both limit switches, a contact of the first limit switch faces the first-stage striker, and a contact of the second limit switch faces the lower surface of one end of the rotating frame.
Preferably, one end of the primary striker, which is arranged between the pulley protective cover and the winding drum, is rotatably provided with a sliding wheel.
Preferably, the rotating frame and the fixed frame are both rectangular frame structures.
Preferably, the shell is of a cylindrical structure, and an opening for movement of the steel wire rope is formed in the shell.
Owing to adopted above-mentioned technical scheme, the utility model discloses relative prior art, the technological progress who gains is: the utility model has simple structure, can realize the lifting height limit of two different forms, and meets the requirement of double limit; the components are clear, so that inspection personnel can conveniently observe and inspect the lifting height limiting device; the application range is wide, and the device is particularly suitable for bridge cranes and gantry cranes; and meanwhile, the device also has the reset function.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of a double-limiting device for the lifting height of a crane of the present invention;
description of the main elements
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Limit structure 2 | Housing 11 |
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Rotating |
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Pulley shield 17 |
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Movable through |
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The following detailed description of the invention will be further described with reference to the drawings
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, an embodiment of the present invention provides a dual-position-limiting device for a lifting height of a crane, where the dual-position-limiting device for a lifting height of a crane includes: a pulley structure 1 and a limiting structure 2;
the pulley structure 1 comprises a shell 11, a winding drum 12, a steel wire rope 13, a rotating motor 14, a pulley 15, a lifting hook 16 and a pulley protective cover 17;
the winding drum 12 is rotatably arranged in the shell 11, the rotating motor 14 is fixedly arranged on the shell 11, and the output end of the rotating motor 14 is fixedly connected with the winding drum 12; the rotary motor 14 is used for driving the winding drum 12 to rotate; the outer side of the pulley 15 is sleeved on the steel wire rope 13; the lifting hook 16 is rotationally connected with the pulley 15; the pulley protective cover 8 is covered above the pulley 15 and is fixedly connected with the lifting hook 16;
the limit structure 2 comprises a connecting plate 22, a fixed frame 23, a rotating frame 24, a first-level impact bar 25, a first limit switch 26, a second limit switch 27 and a spring 28;
one end of the steel wire rope 13 is fixedly arranged on the connecting plate 22, and the other end of the steel wire rope is wound on the outer surface of the winding drum 12; the top of the fixed frame 23 is fixedly connected with the connecting plate 22; the fixed frame 23 is provided with a movable through hole 131; the rotating frame 24 is partially accommodated in the movable through hole 131, and the rotating frame 24 is hinged with the fixed frame 23;
one end of the rotating frame 24 is provided with a wire hole 241 for accommodating a steel wire rope, a first-level striker 25 and a first limit switch 26, and the other end of the rotating frame 24 is provided with a second limit switch 27; one end of the primary bumper 25 is hinged with the rotating frame 24, and the other end of the primary bumper passes through the steel wire rope 13; the first limit switch 26 is fixedly connected with the rotating frame 24, and a limit contact of the first limit switch 26 is arranged above the primary striker 25; the second limit switch 27 is fixedly arranged on the fixed frame 23, and a limit contact of the second limit switch 27 is arranged below one end of the rotating frame 24; the spring 28 is accommodated in the fixed frame 23, and one end of the spring 28 is fixedly connected to the rotating frame 24 and the other end is fixedly connected to the bottom of the fixed frame 23.
In an embodiment of the present invention, the hinge position of the rotating frame 24 and the fixed frame 23 is set between the spring 28 and the second limit switch 27.
In an embodiment of the present invention, the first limit switch 26 and the second limit switch 27 are electrically connected to the rotating electrical machine 14, and the first limit switch 26 and the second limit switch 27 are used for controlling the rotating electrical machine 14 to start and stop.
In an embodiment of the present invention, the first limit switch 26 and the second limit switch 27 are both connected in series in the power circuit of the rotating electrical machine 14; the first limit switch 26 and the second limit switch 27 are used to turn on and off the power supply of the rotating electric machine 14.
In an embodiment of the present invention, the first limit switch and the second limit switch 27 are limit switches, the limit contact of the first limit switch 26 faces the first-level plunger 25, and the limit contact of the second limit switch 27 faces the lower surface of one end of the rotating frame 24.
In an embodiment of the present invention, a sliding wheel 251 is rotatably disposed at an end of the primary lance 25 disposed between the pulley guard 17 and the winding drum 12.
In one embodiment of the present invention, the rotating frame 24 and the fixed frame 23 are rectangular frames.
In an embodiment of the present invention, the housing 11 is a cylindrical structure, and the housing 11 is provided with an opening 111 for movement of the steel wire 13.
When the utility model is used, the rotary motor 14 drives the winding drum 12 to rotate, and further drives the pulley protection cover 17 and the pulley 15 to move towards the winding drum 12, in the process that the pulley protection cover 17 continuously rises, the pulley protection cover 17 drives the first-level plunger 25 to move upwards, so that the first-level plunger 25 touches the contact of the first limit switch 26, and the first limit switch 26 cuts off the power supply of the rotary motor 14, so that the lifting hook 16 stops moving upwards; when the first limit switch 26 is not operated or the first limit switch 26 is short-circuited in the process of special equipment inspector inspection, the pulley protective cover 17 and the pulley 15 continue to move upwards, the primary striker 25 drives one end of the rotating frame 24 to continue to move upwards, and the other end of the rotating frame 24 moves downwards around the hinged point and touches the second limit switch 27. The second limit switch 27 acts to cut off the power supply of the rotating motor 14, so that the lifting hook 16 stops moving upwards, and the lifting height double-limit device function of the crane is realized, thereby realizing two limit functions of one device.
Meanwhile, in the process that the primary collision rod 25 drives one end of the rotating frame 24 to continue to move upwards, the spring 28 is stretched, and when the lifting hook 16 descends, namely the pulley protective cover 17 descends, the spring 28 lifts the end, contacting the rotating frame 24 and the second limit switch 27, of the rotating frame 24 due to restoring force, so that the limit contact of the second limit switch 27 is not contacted with the rotating frame 24 any more, and the second limit switch 27 is reset; the pulley guard 17 continues to descend and the limit contacts of the first limit switch 26 no longer contact the primary striker 25 and the first limit switch 26 is reset.
The present invention has been described in general terms, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Therefore, modifications or improvements without departing from the spirit of the invention are within the scope of the invention.
Claims (6)
1. The utility model provides a hoist hoisting height double spacing device which characterized in that: the double-limiting device for the lifting height of the crane comprises: a pulley structure and a limiting structure;
the pulley structure comprises a shell, a winding drum, a steel wire rope, a rotating motor, a pulley, a lifting hook and a pulley protective cover;
the winding drum is rotationally arranged in the shell, the rotating motor is fixedly arranged on the shell, and the output end of the rotating motor is fixedly connected with the winding drum; the rotating motor is used for driving the winding drum to rotate; the outer side of the pulley is sleeved on the steel wire rope; the lifting hook is rotationally connected with the pulley; the pulley protective cover is covered above the pulley and is fixedly connected with the lifting hook;
the limiting structure comprises a connecting plate, a fixed frame, a rotating frame, a primary bumper bar, a first limiting switch and a second limiting switch;
one end of the steel wire rope is fixedly arranged on the connecting plate, and the other end of the steel wire rope is wound on the outer surface of the winding drum; the top of the fixed frame is fixedly connected with the connecting plate; the fixed frame is provided with a movable through hole; the rotating frame part is accommodated in the movable through hole, and the rotating frame is hinged with the fixed frame;
one end of the rotating frame is provided with a wire hole for accommodating a steel wire rope, a first-level collision rod and a first limit switch, and the other end of the rotating frame is provided with a second limit switch; one end of the first-level collision rod is hinged with the rotating frame, and the other end of the first-level collision rod penetrates through the steel wire rope; the first limit switch is fixedly connected with the rotating frame and arranged above the first-stage collision rod; the second limit switch is fixedly arranged on the fixed frame, and the second limit switch is arranged below one end of the rotating frame; the first limit switch and the second limit switch are both electrically connected with the rotating motor, and the first limit switch and the second limit switch are used for starting and stopping the rotating motor.
2. A dual stop device for the hoisting height of a crane as claimed in claim 1, wherein: the limiting structure further comprises a spring, the spring is contained in the fixed frame, one end of the spring is fixedly connected with the rotating frame, and the other end of the spring is fixedly connected with the fixed frame.
3. A dual hoist height limiting device as claimed in claim 2, wherein: the first limit switch and the second limit switch are both limit switches, the contact of the first limit switch faces the first-stage collision rod, and the contact of the second limit switch faces the lower surface of one end of the rotating frame.
4. A dual hoist height limit device according to claim 3, wherein the hinge point of the rotating frame and the fixed frame is provided between the spring and the second limit switch.
5. A double spacing device for hoisting height of crane according to claim 4, wherein: one end of the primary lance arranged between the pulley protective cover and the winding drum is rotatably provided with a sliding wheel.
6. A crane lifting height double-limiting device according to claim 5, characterized in that: the rotating frame and the fixed frame are both rectangular frame structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221502173.XU CN217535287U (en) | 2022-06-14 | 2022-06-14 | Double-limiting device for lifting height of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221502173.XU CN217535287U (en) | 2022-06-14 | 2022-06-14 | Double-limiting device for lifting height of crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217535287U true CN217535287U (en) | 2022-10-04 |
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ID=83419829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221502173.XU Active CN217535287U (en) | 2022-06-14 | 2022-06-14 | Double-limiting device for lifting height of crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217535287U (en) |
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2022
- 2022-06-14 CN CN202221502173.XU patent/CN217535287U/en active Active
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