CN216669073U - Force measuring ring for crane - Google Patents
Force measuring ring for crane Download PDFInfo
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- CN216669073U CN216669073U CN202123279544.0U CN202123279544U CN216669073U CN 216669073 U CN216669073 U CN 216669073U CN 202123279544 U CN202123279544 U CN 202123279544U CN 216669073 U CN216669073 U CN 216669073U
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Abstract
The utility model provides a force measuring ring for a crane, which comprises an annular shell, wherein two ends of the shell are stress ends; first shell fragment and second shell fragment, cross set up in the annular housing in, first shell fragment and second shell fragment be the zigzag shell fragment, first shell fragment include first rotating part, connect respectively in two first compression portions at first rotating part both ends, the second shell fragment include the second rotating part, connect respectively in two second compression portions at second rotating part both ends, first rotating part and second rotating part intercrossing set up, the free tip of two first compression portions is connected to respectively the casing, the free tip of two second compression portions is connected to respectively the casing. The utility model relates to a force measuring ring for a crane, which obtains the deformation of the force measuring ring by continuously measuring the intersection included angle of two Z-shaped elastic sheets. The force applied to the force measuring ring can be continuously output.
Description
Technical Field
The utility model relates to the field of lifting equipment, in particular to a force measuring ring for a crane.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
At present, the weight limitation of the tower crane is mostly realized by measuring the deformation of the force measuring ring on the steel wire rope. Namely: after the hoisting load, the force measuring ring deforms, so that the opening amplitude of the elastic sheet in the force measuring ring changes, the tact switches at different positions act, and a load signal is output.
Fig. 1 is a schematic structural diagram of a force measuring ring in the prior art. Including the dynamometry ring body, install two shell fragments at the dynamometry ring body internal, two shell fragments all set up along the fore-and-aft direction of dynamometry ring body, and two shell fragments are respectively to the curved arc that becomes of left right direction, are provided with the detector on the shell fragment, and this detector is the light touch switch usually, when two pull rings receive the pulling force of left right direction respectively about, and the distance between two shell fragments changes, through measuring the distance between two shell fragments, obtains tensile size.
However, the force ring shown in fig. 1 has the following drawbacks: (1) only a plurality of switch signals can be output, and weight signals cannot be continuously output, so that the signal processing of the control system is inconvenient. (2) The influence of temperature is large, and when the weight limiter expands with heat and contracts with cold at different temperatures, the expansion amount of the elastic sheet can be changed, and the accuracy is not high. (3) The contact type measurement mode is used, the service life is short, and the precision influence can be caused by the abrasion, the corrosion and the pollution of the contact.
In patent document CN2011998513U, a force measuring ring is disclosed, which includes a first deformation sheet and a second deformation sheet that are crossed with each other, when the force measuring ring receives a pulling force, the distance between the first deformation sheet and the second deformation sheet changes, and the pulling force measured by the force measuring ring is calculated by measuring the distance between the two deformation sheets. However, in the patent, the bending radian directions of the first deformation sheet and the second deformation sheet are consistent, which causes that the distance between the two deformation sheets can only slightly change when the force measuring ring is under tension, which causes that the final measurement error is larger and the measurement result is inaccurate.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the utility model.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a force measuring ring for a crane.
In order to solve the technical problem, the application provides a force measuring ring for a crane, which comprises an annular shell, wherein two ends of the shell are stress ends; the first elastic sheet and the second elastic sheet are arranged in the annular shell in a crossed mode, the first elastic sheet and the second elastic sheet are Z-shaped elastic sheets, the first elastic sheet comprises a first rotating part and two first compression parts connected to two ends of the first rotating part respectively, the second elastic sheet comprises a second rotating part and two second compression parts connected to two ends of the second rotating part respectively, the first rotating part and the second rotating part are arranged in a crossed mode, free end parts of the two first compression parts are connected to the shell respectively, free end parts of the two second compression parts are connected to the shell respectively, and a detection device is arranged on the first rotating part and the second rotating part and used for detecting the distance between a first detection point and a second detection point.
Preferably, the first detection point is provided at an end of the first rotating portion, and the second detection point is provided at an end of the second rotating portion.
Preferably, the force measuring ring further includes a detecting device for detecting a relative distance between the first rotating portion and the second rotating portion, or for detecting a relative angle between the first rotating portion and the second rotating portion, and determining a tensile force applied to the housing according to the detected distance or angle.
Preferably, the free ends of the two first compression parts are fixedly connected to the inner surface of the shell by welding, and a first connecting line of the connecting points of the two first compression parts and the shell is coincided with the diameter of the shell; the free ends of the two second compression parts are fixedly connected to the inner surface of the shell in a welding mode, and a second connecting line of the connecting points of the two second compression parts and the shell is coincided with the diameter of the shell.
Preferably, the first connecting line and the second connecting line are perpendicular to each other, the first rotating portion and the second rotating portion are perpendicular to each other without being affected by an external force, a cross point of the first rotating portion and the second rotating portion is a center of a circle of the housing, an included angle between the first compressing portion and the first connecting line is 15-60 degrees, and an included angle between the second compressing portion and the second connecting line is 15-60 degrees.
Preferably, when the housing receives an external force, the first rotating part and the second rotating part rotate around the center of the housing.
Preferably, the first rotating part and the second rotating part are rotatably connected at the intersection through a rotating shaft.
Preferably, pull rings are arranged at two ends of the shell and used for connecting the pull rope, and the straight line where the two stress ends of the shell are located coincides with the second connecting line.
By means of the technical scheme, the utility model has the following beneficial effects:
the force measuring ring for the crane obtains the deformation of the force measuring ring by continuously measuring the intersection included angle of the two Z-shaped elastic sheets. The force applied to the force measuring ring can be continuously output. In the scheme in the prior art, the micro switch is used for sensing the distance between the two elastic sheets, only one or more micro switches can be installed, and only the force applied to the force measuring ring can be sensed in a segmented mode. In addition, the force measuring ring has a temperature compensation function, when the force measuring ring expands or contracts along with temperature change, the intersected parts between the two Z-shaped elastic sheets rotate synchronously, the relative angle is unchanged, and measurement deviation caused by temperature change can be compensated. The relative angle measurement of the two Z-shaped elastic sheets can be carried out in a potentiometer (resistance) mode, a magnetic field (Hall) mode or an electromagnetic induction mode.
Drawings
Fig. 1 is a schematic structural diagram of a force measuring ring in the prior art.
Fig. 2 is a schematic structural diagram of the force measuring ring of the present application.
Fig. 3 is a schematic view of the rotation direction of the spring plate when the temperature of the force measuring ring is increased.
Fig. 4 is a schematic view of the rotation direction of the elastic sheet when the force measuring ring of the present application is under tension.
Wherein: 1', a force measuring ring body; 2', a first elastic sheet; 3' and a second elastic sheet; 4', a pull ring; 5', a detector; 1. a housing; 2. a first spring plate; 3. a second elastic sheet; 4. a pull ring; 5. detecting points; 21. a first rotating section; 22. a first compression section; 31. a second rotating section; 32. a second compression section.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 2 to 4, the force measuring ring of the present application includes an annular housing 1, and two ends of the housing 1 are force bearing ends; first shell fragment 2 and second shell fragment 3, cross set up in annular casing 1 in, first shell fragment 2 and second shell fragment 3 be the zigzag shell fragment, first shell fragment 2 include first rotating part 21, connect respectively in two first compression portions 22 at first rotating part 21 both ends, second shell fragment 3 include second rotating part 31, connect respectively in two second compression portions 32 at second rotating part 31 both ends, first rotating part 21 and second rotating part 31 intercross set up, the free end of two first compression portions 22 is connected to respectively casing 1, the free end of two second compression portions 32 is connected to respectively casing 1. The force measuring ring further comprises a detection device for detecting the relative distance between the first rotating part 21 and the second rotating part 31, or for detecting the relative angle between the first rotating part 21 and the second rotating part 31, and judging the tension force applied to the shell 1 according to the detected distance or angle. The force measuring ring has a temperature compensation function, when the force measuring ring expands or contracts along with temperature change, the intersected parts in the middle of the two Z-shaped elastic pieces synchronously rotate, the relative angle is unchanged, and measurement deviation caused by temperature change can be compensated. The relative angle measurement of the two Z-shaped elastic sheets can be carried out in a potentiometer (resistance) mode, a magnetic field (Hall) mode or an electromagnetic induction mode.
The free ends of the two first compression parts 22 are fixedly connected to the inner surface of the shell 1 by welding, and a first connecting line of the connecting points of the two first compression parts 22 and the shell 1 is coincided with the diameter of the shell 1; the free ends of the two second compression parts 32 are fixedly connected to the inner surface of the shell 1 by welding, and a second connecting line of the connecting points of the two second compression parts 32 and the shell 1 is coincident with the diameter of the shell 1. When the force measuring ring receives external force, the deformation of the shell can be transmitted to the elastic sheet to the maximum extent, so that the elastic sheet is deformed to the maximum extent.
The first connecting line and the second connecting line are perpendicular to each other, the first rotating portion 21 and the second rotating portion 31 are perpendicular to each other under the action of no external force, the intersection point of the first rotating portion 21 and the second rotating portion 31 is the center of the circle of the shell 1, the included angle between the first compressing portion 22 and the first connecting line is 15-60 degrees, and the included angle between the second compressing portion 32 and the second connecting line is 15-60 degrees. When the housing 1 receives an external force, the first rotating portion 21 and the second rotating portion 31 rotate around the center of the housing 1. In a preferred embodiment, the first rotating portion 21 and the second rotating portion 31 are rotatably connected at the intersection by a rotating shaft. The first rotating part 21 and the second rotating part 31 are respectively provided with a first detection point 5 and a second detection point 5, and the detection device is used for detecting the distance between the first detection point 5 and the second detection point 5. Pull rings 4 are arranged at two ends of the shell 1, the pull rings 4 are used for connecting pull ropes, and the straight lines of the two stress ends of the shell 1 coincide with the second connecting line.
As shown in fig. 4, in the force measuring ring of the present application, when the force measuring ring is under tension, the first rotating portion 21 rotates counterclockwise around the center of a circle, the second rotating portion 31 rotates clockwise around the center of a circle, and the distance between the two detecting points 5 changes, and in a preferred embodiment, the detecting points 5 are disposed at the ends of the rotating portions. Because the detection points 5 are at a distance from the center of the shell 1, even if the shell 1 deforms slightly, the distance between the two detection points 5 changes greatly, the size of the pulling force is judged by detecting the distance between the two detection points 5, the obtained result error is small, and the precision is high. In addition, the design of two shell fragments of this application makes the deformation that casing 1 takes place the biggest reach the shell fragment.
According to the force measuring ring and the crane, the deformation of the force measuring ring is obtained by continuously measuring the crossed included angle of the two Z-shaped elastic sheets. The force applied to the force measuring ring can be continuously output.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.
Claims (7)
1. A force ring for a crane, characterized in that the force ring comprises,
the two ends of the shell are stress ends;
the first elastic sheet and the second elastic sheet are arranged in the annular shell in an intersecting way, the first elastic sheet and the second elastic sheet are Z-shaped elastic sheets, the first elastic sheet comprises a first rotating part and two first compression parts respectively connected with two ends of the first rotating part, the second elastic sheet comprises a second rotating part and two second compression parts respectively connected with two ends of the second rotating part, the first rotating part and the second rotating part are arranged in an intersecting way, the free end parts of the two first compression parts are respectively connected to the shell, the free end parts of the two second compression parts are respectively connected to the shell,
the detection device is used for detecting the distance between the first detection point and the second detection point.
2. The force ring of claim 1, wherein the first detection point is provided at an end of the first rotating portion, and the second detection point is provided at an end of the second rotating portion.
3. The force measuring ring of claim 2, wherein free ends of the two first compression parts are fixedly connected to the inner surface of the shell by welding, and a first connecting line of connecting points of the two first compression parts and the shell is coincident with the diameter of the shell; the free ends of the two second compression parts are fixedly connected to the inner surface of the shell in a welding mode, and a second connecting line of the connecting points of the two second compression parts and the shell is coincided with the diameter of the shell.
4. The force measuring ring of claim 3, wherein the first connecting line and the second connecting line are perpendicular to each other, and under the action of no external force, the first rotating portion and the second rotating portion are perpendicular to each other, the intersection point of the first rotating portion and the second rotating portion is the center of the circle of the shell, the included angle between the first compressing portion and the first connecting line is 15-60 degrees, and the included angle between the second compressing portion and the second connecting line is 15-60 degrees.
5. The force ring of claim 4, wherein the first and second rotating portions rotate about a center of the housing when the housing is subjected to an external force.
6. The force ring of claim 5, wherein the first and second rotating portions are rotatably coupled at an intersection by a shaft.
7. The force measuring ring of claim 5 or 6, wherein pull rings are arranged at two ends of the shell, the pull rings are used for connecting a pull rope, and the straight line where the two stress ends of the shell are located coincides with the second connecting line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123279544.0U CN216669073U (en) | 2021-12-24 | 2021-12-24 | Force measuring ring for crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123279544.0U CN216669073U (en) | 2021-12-24 | 2021-12-24 | Force measuring ring for crane |
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| Publication Number | Publication Date |
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| CN216669073U true CN216669073U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123279544.0U Active CN216669073U (en) | 2021-12-24 | 2021-12-24 | Force measuring ring for crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414104A (en) * | 2021-12-24 | 2022-04-29 | 苏州凯德斯电子科技有限公司 | Force measuring ring and crane |
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2021
- 2021-12-24 CN CN202123279544.0U patent/CN216669073U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414104A (en) * | 2021-12-24 | 2022-04-29 | 苏州凯德斯电子科技有限公司 | Force measuring ring and crane |
| CN114414104B (en) * | 2021-12-24 | 2024-07-23 | 苏州凯德斯电子科技有限公司 | Force measuring ring and crane |
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