Stroke detection device and crane
By using a stroke detection device in the crane to monitor the movement of the winding body, the problems of encoder wear and electromagnetic interference are solved, achieving high-precision and stable stroke monitoring, ensuring the safe and reliable operation of the crane and reducing maintenance costs.
Patent Information
- Application Number
- CN202520452097.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Traditional encoders in cranes are susceptible to wear and electromagnetic interference, which leads to decreased signal accuracy and instability in the control system, increasing operational risks and maintenance costs.
A travel detection device is adopted, including a shaft component, a first winding body, a support assembly, and a proximity switch. Through the cooperation of the proximity switch and the travel switch, the movement status of the winding body is monitored to achieve de-snagging protection and avoid signal errors caused by mechanical wear and electromagnetic interference.
It improves the accuracy and stability of crane stroke monitoring, ensures safe and reliable operation, extends service life, and reduces maintenance costs.
Smart Images
Figure CN223792806U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, and in particular to a stroke detection device and a crane. Background Technology
[0002] In existing technologies, cranes, as key equipment for heavy material handling, play an irreplaceable role in various industrial and construction fields. To ensure the safety and reliability of cranes during operation, stroke monitoring technology is particularly important. The main purpose of stroke monitoring is to ensure that the crane moves along a predetermined path within its working range, avoiding accidents caused by exceeding the working range. In traditional crane systems, the crane encoder is a core component used to accurately measure lifting position, speed, and acceleration. The encoder senses the movement of the rotating shaft and converts it into electronic signals, providing precise feedback to the control system, thereby achieving precise control of the crane's stroke.
[0003] However, traditional encoder technology has several limitations. Firstly, with prolonged use, the mechanical parts of the encoder may wear down, leading to a gradual decrease in the accuracy of the output signal. Secondly, the encoder signal is susceptible to electromagnetic interference (EMI) and radio frequency interference (RFI), especially near high-frequency equipment, which can cause the encoder to output incorrect signals, severely affecting the stability and accuracy of the control system. These problems not only increase the operational risks of the crane but may also lead to higher maintenance costs. Utility Model Content
[0004] In view of this, in order to solve the above problems, the purpose of this utility model is to provide a stroke detection device, including: a shaft-shaped component, a first winding body, a support assembly, and a plurality of proximity switches. The shaft-shaped component is provided with at least one first spiral groove. The first winding body is movably disposed in the first spiral groove. The support assembly is disposed close to the shaft-shaped component. The support assembly provides at least one mounting surface, which is parallel to the axis of the shaft-shaped component. The plurality of proximity switches are arranged sequentially along the axial direction of the shaft-shaped component. Each proximity switch is respectively positioned opposite the highest point of each turn of the first winding body.
[0005] In another preferred embodiment, the support assembly includes at least: a rod extending axially along the shaft-shaped component, the rod being disposed above the shaft-shaped component, a gap being formed between the rod and the shaft-shaped component, and the mounting surface being formed on the lower surface of the rod.
[0006] In another preferred embodiment, it further includes: a second winding body, wherein the shaft-shaped component has at least one second spiral groove, and the second winding body is movably disposed within the second spiral groove;
[0007] When both the second winding body and the first winding body are wound around the shaft component, the outer diameter of the second winding body is larger than the outer diameter of the first winding body, and the proximity switch is staggered from the second winding body.
[0008] In another preferred embodiment, the support assembly further includes a bracket and a limit switch, wherein the rod is movably mounted on the bracket, the limit switch is fixedly mounted on the bracket, the limit switch is positioned opposite the rod, and the rod is movably positioned close to or away from the limit switch.
[0009] In another preferred embodiment, the bracket includes a vertical frame, a horizontal frame, and a guide member. One end of the horizontal frame is fixedly connected to the upper end of the vertical frame. The guide member and the limit switch are provided on the horizontal frame. The rod is slidably mounted on the guide member and is positioned above the horizontal frame.
[0010] In another preferred embodiment, the system further includes a control system, wherein both the limit switch and the proximity switch are communicatively connected to the control system.
[0011] The purpose of this utility model is also to provide a crane, which includes the stroke detection device described in any one of the above.
[0012] In another preferred embodiment, the shaft-shaped component is arranged in a drum structure, the first winding body is a steel wire rope, and the second winding body is a cable.
[0013] In another preferred embodiment, the two first spiral grooves are respectively disposed at both ends of a second spiral groove.
[0014] In another preferred embodiment, it further includes a power system for driving the rotation of the shaft component.
[0015] Because this utility model adopts the above-mentioned technical solution, it has the following positive effects compared with the prior art:
[0016] By applying this utility model, a travel monitoring device capable of realizing a slippage protection mechanism is provided. Through the cooperation of proximity switches and limit switches, the movement status of the lifting wire rope and cable is monitored, which significantly improves the accuracy and stability of crane travel monitoring, ensures the safe and reliable operation of the crane, effectively avoids signal errors caused by mechanical wear or electromagnetic interference, and also extends service life and reduces maintenance costs. Attached Figure Description
[0017] Figure 1This is a schematic diagram of a stroke detection device according to the present invention;
[0018] Figure 2 This is a schematic diagram of a crane according to the present invention.
[0019] In the attached image:
[0020] 1. Shaft component 1; 2. First winding body 2; 3. Support assembly 3; 4. Proximity switch 4; 5. First spiral groove 5; 6. Rod body 6; 7. Second winding body 7; 8. Second spiral groove 8; 9. Bracket 9; 10. Limit switch 10; 11. Vertical frame 11; 12. Horizontal frame 12; 13. Guide component 13; 14. Control system 14; 15. Power system 15; 16. Connector 16. Detailed Implementation
[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0022] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0023] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".
[0024] like Figure 1The diagram illustrates a preferred embodiment of a stroke detection device, comprising: a shaft-shaped component 1, a first winding body 2, a support assembly 3, and a plurality of proximity switches 4. The shaft-shaped component 1 has at least one first spiral groove 5, the first winding body 2 is movably disposed within the first spiral groove 5, the support assembly 3 is disposed close to the shaft-shaped component 1, and the support assembly 3 is provided with at least one mounting surface, which is arranged parallel to the axis of the shaft-shaped component 1. The plurality of proximity switches 4 are arranged sequentially along the axial direction of the shaft-shaped component 1, and each proximity switch 4 is respectively positioned opposite the highest point of each turn of the first winding body 2. Furthermore, due to the cooperation of the first spiral groove 5, the first winding body 2 is spirally arranged on the shaft component 1 and forms several turns along the axial direction of the shaft component 1; when the shaft component 1 is rotated, the first winding body 2 in the first spiral groove 5 can be gradually released outward or gradually retracted inward; during the rotation operation, the proximity switch 4 corresponds to the number of turns of the first winding body 2, so that each proximity switch 4 monitors the movement state of the corresponding turn or part of the first winding body 2; preferably, when the first winding body 2 is dislodged, that is, when it is detached from the first spiral groove 5, the proximity switch 4 will obtain the corresponding dislodging information, so as to stop the release or retraction of the first winding body 2 by stopping the rotation of the shaft component 1.
[0025] Furthermore, as a preferred embodiment, the proximity switch 4 is preferably of the type used to sense magnetic signals, and the first winding body 2 is preferably magnetized so that it can have a corresponding magnetic signal during movement so that it can be acquired by the proximity switch 4.
[0026] Furthermore, in a preferred embodiment, the support assembly 3 includes at least: a rod 6, which extends axially along the shaft-shaped component 1, is positioned above the shaft-shaped component 1, and a gap is formed between the rod 6 and the shaft-shaped component 1. A mounting surface is formed on the lower surface of the rod 6. Furthermore, the rod 6 serves as the mounting base for the proximity switch 4.
[0027] Furthermore, as a preferred embodiment, it also includes: a second winding body 7, with at least one second spiral groove 8 provided on the shaft-shaped component 1, and the second winding body 7 being movably disposed in the second spiral groove 8; wherein, when both the second winding body 7 and the first winding body 2 are wound on the shaft-shaped component 1, the outer diameter of the second winding body 7 is larger than the outer diameter of the first winding body 2, and the proximity switch 4 is staggered from the second winding body 7.
[0028] Furthermore, in a preferred embodiment, the support assembly 3 further includes a bracket 9 and a limit switch 10. The rod 6 is movably mounted on the bracket 9, and the limit switch 10 is fixedly mounted on the bracket 9. The limit switch 10 is positioned directly opposite the rod 6, and the rod 6 is movably positioned closer to or further away from the limit switch 10. Furthermore, when the second winding 7 experiences a groove detachment problem, i.e., it detaches outward from the second spiral groove 8, it will come into contact with the rod 6, causing the rod 6 to move vertically and change its position relative to the bracket 9. At this time, the limit switch 10 is triggered to obtain information about the detachment of the second winding 7.
[0029] Furthermore, in a preferred embodiment, the bracket 9 includes: a vertical frame 11, a horizontal frame 12, and a guide member 13. One end of the horizontal frame 12 is fixedly connected to the upper end of the vertical frame 11. The horizontal frame 12 is provided with the guide member 13 and a limit switch 10. The rod 6 is slidably mounted on the guide member 13 and is positioned above the horizontal frame 12.
[0030] Furthermore, as a preferred embodiment, the crossbar 12 has an extending tendency near the upper end of the shaft member 1.
[0031] Furthermore, as a preferred embodiment, the horizontal frame 12 is configured as a plate structure, and the vertical frame 11 is configured as a column structure.
[0032] Furthermore, as a preferred embodiment, a connector 16 is provided at the end of the rod 6. The connector 16 is perpendicularly connected to the upper surface of the rod 6, and the rod 6 is slidably mounted on the crossbar 12 through the connector 16.
[0033] Furthermore, as a preferred embodiment, the guide member 13 is preferably a guide post, and the connector 16 is provided with a corresponding guide hole, with the guide post and the guide hole being slidably fitted in the vertical direction.
[0034] Furthermore, as a preferred embodiment, the two connectors 16 are respectively disposed at both ends of the rod body 6, and correspondingly, two brackets 9 and two limit switches 10 should be provided.
[0035] Furthermore, as a preferred embodiment, the limit switch 10 is preferably disposed between the connector 16 and the crossbar 12, in which case the connector 16 can be regarded as part of the rod 6 as the trigger end of the limit switch 10.
[0036] Furthermore, as a preferred embodiment, it also includes a control system 14, with the limit switch 10 and proximity switch 4 all communicatively connected to the control system 14. Further, the control system 14 analyzes and processes the de-slotting information sent by the limit switch 10 and the proximity switch 4 to specifically determine the de-slotting situation and confirm whether it is necessary to terminate the rotation of the shaft component 1.
[0037] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model.
[0038] Based on the above, this utility model also has the following embodiments:
[0039] like Figure 2 As shown, a preferred embodiment of a crane is illustrated, the crane including any of the stroke detection devices described above.
[0040] In a further embodiment of this utility model, the shaft component 1 is arranged in the form of a drum structure, the first winding body 2 is a steel wire rope, and the second winding body 7 is a cable.
[0041] In a further embodiment of this invention, when there is no wire rope in the first spiral groove 5, the signal of the proximity switch 4 remains unchanged; when the drum structure rotates, the signal change of the proximity switch 4 can be used to calculate the number of turns the wire rope has made in lifting or lowering, and then the total travel distance can be calculated based on the diameter of the drum structure. Furthermore, during lifting or lowering, there are signal jump intervals, indicating that the wire rope has derailed, and the control system 14 will issue a warning and stop operation. If the cable derails, the rod 6 will be lifted, causing the limit switch 10 to receive a signal, issuing a warning and stopping operation.
[0042] In a further embodiment of this utility model, two first spiral grooves 5 are respectively disposed at both ends of a second spiral groove 8.
[0043] In a further embodiment of this utility model, it further includes: a power system 15, which is used to drive the rotation of the shaft component 1. Furthermore, the power system 15 is communicatively connected to the control system 14 to automatically determine whether it is necessary to stop the rotation of the shaft component 1.
[0044] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A stroke detection device, characterized in that, include: The device comprises a shaft-shaped component, a first winding body, a support assembly, and a plurality of proximity switches. The shaft-shaped component has at least one first helical groove. The first winding body is movably disposed within the first helical groove. The support assembly is disposed close to the shaft-shaped component and provides at least one mounting surface parallel to the axis of the shaft-shaped component. The plurality of proximity switches are sequentially disposed along the axial direction of the shaft-shaped component, with each proximity switch directly opposite the highest point of each turn of the first winding body.
2. The stroke detection device according to claim 1, characterized in that, The support assembly includes at least: a rod extending axially along the shaft-shaped component, the rod being disposed above the shaft-shaped component, a gap being formed between the rod and the shaft-shaped component, and a mounting surface being formed on the lower surface of the rod.
3. The stroke detection device according to claim 2, characterized in that, Also includes: The second winding body has at least one second spiral groove on the shaft-shaped component, and the second winding body is movably disposed in the second spiral groove; When both the second winding body and the first winding body are wound around the shaft component, the outer diameter of the second winding body is larger than the outer diameter of the first winding body, and the proximity switch is staggered from the second winding body.
4. The stroke detection device according to claim 3, characterized in that, The support assembly further includes a bracket and a limit switch. The rod is movably mounted on the bracket, and the limit switch is fixedly mounted on the bracket. The limit switch is positioned directly opposite the rod, and the rod is movably positioned closer to or further away from the limit switch.
5. The stroke detection device according to claim 4, characterized in that, The bracket includes a vertical frame, a horizontal frame, and a guide member. One end of the horizontal frame is fixedly connected to the upper end of the vertical frame. The guide member and the limit switch are provided on the horizontal frame. The rod is slidably mounted on the guide member and is positioned above the horizontal frame.
6. The stroke detection device according to claim 4, characterized in that, Also includes: The control system includes both the limit switch and the proximity switch, which are communicatively connected to the control system.
7. A crane, characterized in that, The crane includes the stroke detection device described in any one of claims 1 to 6.
8. The crane according to claim 7, characterized in that, The shaft-shaped component is configured as a drum structure, with the first winding body being a steel wire rope and the second winding body being a cable.
9. The crane according to claim 7, characterized in that, The two first spiral grooves are respectively disposed at both ends of the second spiral groove.
10. The crane according to claim 7, characterized in that, Also includes: A power system for driving the rotation of the shaft component.