Safe lifting device for clamp
By setting up an L-shaped clamping arm and glass fiber sensor on the fixture, combined with a PLC controller, precise position control of the aluminum coil lifting process is achieved, safety accidents caused by mechanical limit clearance are solved, and lifting safety is improved.
Patent Information
- Application Number
- CN202421856728.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-02
AI Technical Summary
During the aluminum production process, when the automated driving equipment lifts the aluminum coil, due to the mechanical limit, there are frequent safety accidents of scraping and turning the coil after the fixture is moved, and the existing technology cannot effectively solve it.
The L-shaped clamp arm is equipped with two sets of upper and lower glass fiber sensors and clamping limit sensors. Combined with the PLC controller, it accurately obtains the relative position status of the clamp and the coil material, and controls the opening and closing and lifting movements of the clamp arm.
The safety of the aluminum coil lifting process is improved, and the scraping accidents between fixtures and coils are avoided, ensuring the reliability and safety of the lifting process.
Smart Images
Figure CN223060508U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automatic overhead crane operation, and particularly relates to a fixture safety lifting device. Background Art
[0002] In the process of aluminum production, an automatic overhead crane device uses a fixture to lift aluminum coils. Since the temperature of the lifted coil is relatively high, reaching above 350°C, ordinary photoelectric limit switches cannot be installed and used, so mechanical limit switches are usually used for detection. Due to the conduction gap existing in the mechanical limit switch, that is, the so-called dead band, there is a situation where there is no feedback signal from the mechanical limit switch, but the limit surface still contacts the coil, resulting in an accident that the coil is scraped and overturned after the fixture operates.
[0003] Therefore, it is necessary to further improve the fixture device and strengthen the safety interlock function. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a fixture safety lifting device, which is beneficial to improving the safety of coil lifting.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a fixture safety lifting device, including two symmetrically arranged left and right L-shaped clamping arms. The clamping arm is composed of a vertically arranged clamping part and a horizontally arranged bearing part connected to the inner side of the lower end of the clamping part. A clamping limit sensor is arranged on the inner side surface of the clamping part, and a bearing limit sensor is arranged on the upper side surface of the bearing part. A set of upper sensors and a set of lower sensors are oppositely installed on the clamping parts of the left and right clamping arms. The installation position of the set of upper sensors is higher than the bearing limit sensor, and the installation position of the set of lower sensors is lower than the bearing limit sensor.
[0006] Further, both the set of upper sensors and the set of lower sensors are glass fiber sensors.
[0007] Further, the set of upper sensors is composed of an upper left sensor installed on the left clamping arm and an upper right sensor installed on the right clamping arm; the set of lower sensors is composed of a lower left sensor installed on the left clamping arm and a lower right sensor installed on the right clamping arm.
[0008] Further, the left and right clamping arms are installed on a fixture frame and are respectively driven by left and right motor driving mechanisms for horizontal movement.
[0009] Further, an arm encoder is arranged on the driving motor of the motor driving mechanism to measure and control the rotation angle and speed of the corresponding driving motor through the arm encoder, and further control the opening and closing movement distance of the left and right clamping arms.
[0010] Furthermore, the fixture rack is installed at the lower end of the lifting mechanism of the overhead crane, so as to perform lifting movement driven by the lifting mechanism.
[0011] Furthermore, it includes a PLC controller. The clamping limit sensors, load limit sensors, upper sensors, and lower sensors on the left and right clamping arms are respectively electrically connected to the input end of the PLC controller, and the output end of the PLC controller is electrically connected to the control ends of the left and right motor drive mechanisms and the lifting mechanism.
[0012] Compared with the prior art, the present utility model has the following beneficial effects: The present utility model provides a fixture safety lifting device. By setting two groups of upper and lower sensors on the fixture of the lifting device and combining with the original limit signal sensors of the fixture, the relative position state between the fixture and the coil can be accurately obtained and judged. On this basis, the fixture is made to perform the next action, thereby effectively improving the safety of the coil lifting process. Therefore, the present utility model has strong practicability and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic structural diagram of the device in the embodiment of the present utility model.
[0014] In the figure: 1 - clamping arm; 101 - clamping part; 102 - load-bearing part; 2 - clamping limit sensor; 3 - load limit sensor; 4 - upper glass fiber sensor; 5 - lower glass fiber sensor; 6 - fixture rack; 7 - motor drive mechanism; 8 - clamping arm encoder. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The following further describes the present utility model in conjunction with the drawings and embodiments.
[0016] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.
[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0018] Such as Figure 1As shown in the figure, this embodiment provides a fixture safety lifting device, including two symmetrically arranged left and right L-shaped clamping arms 1. The clamping arm 1 is composed of a vertically arranged clamping part 101 and a horizontally arranged load-bearing part 102 connected to the inner side of the lower end of the clamping part. A clamping limit sensor 2 is arranged on the inner side of the clamping part 101, and a load-bearing limit sensor 3 is arranged on the upper side of the load-bearing part 102. A set of upper sensors 4 and a set of lower sensors 5 are oppositely installed on the clamping parts 101 of the left and right clamping arms 1. The installation position of the set of upper sensors 4 is higher than that of the load-bearing limit sensor 3, and the installation position of the set of lower sensors 5 is lower than that of the load-bearing limit sensor 3.
[0019] In this embodiment, both the upper sensor group 4 and the lower sensor group 5 adopt glass fiber sensors. The upper sensor group 4 is composed of a left upper sensor installed on the left clamping arm and a right upper sensor installed on the right clamping arm; the lower sensor group 5 is composed of a left lower sensor installed on the left clamping arm and a right lower sensor installed on the right clamping arm.
[0020] The left and right clamping arms 1 are installed on the fixture frame 6 and are respectively driven by the left and right motor drive mechanisms 7 to perform lateral movement. An arm encoder 8 is arranged on the drive motor of the motor drive mechanism 7 to measure and control the rotation angle and speed of the corresponding drive motor through the arm encoder, and further control the opening and closing movement distance of the left and right clamping arms.
[0021] The fixture frame 6 is installed at the lower end of the lifting mechanism of the crane to perform lifting movement under the drive of the lifting mechanism.
[0022] The fixture safety lifting device further includes a PLC controller. The clamping limit sensors 2, load-bearing limit sensors 3, upper sensor group 4, and lower sensor group 5 on the left and right clamping arms 1 are respectively electrically connected to the input end of the PLC controller to obtain the detection signals of each sensor through the PLC controller. The output end of the PLC control is electrically connected to the control ends of the left and right motor drive mechanisms 7 and the lifting mechanism to control the opening and closing actions and lifting movements of the clamping arms through the PLC controller.
[0023] The working process of the clamp safety lifting device provided by the utility model is as follows: when the crane is empty and ready to lift the coil, the lifting mechanism drives the clamp arm to descend to the set height, and the clamp arm is allowed to perform the clamping action only when both the upper sensor group 4 and the lower sensor group 5 are not triggered. Because at this time, it means that the load-bearing part 102 of the clamp arm 1 is fully located in the hollow position of the coil. When the clamp arm clamps and lifts the coil, the coil bears the load on the load-bearing part 102, at this time, the clamping limit sensor 2 is in the triggered state, and the load-bearing limit sensor 3 is in the triggered state. Since the installation position of the upper sensor group 4 is higher than the load-bearing limit sensor 3, the upper sensor group 4 is also in the triggered state, and the lower sensor group 5 is still in the hollow position of the coil, so it is not triggered. When the crane lifts the coil to the target position and is ready to put down the coil, the lifting mechanism drives the clamp arm to descend, and the clamp arm is allowed to open only when the load-bearing limit sensor 3 is not triggered and the upper sensor group 4 and the lower sensor group 5 are also not triggered. Because at this time it means that the load-bearing part 102 of the clamp arm 1 is fully separated from the coil and is located in the hollow position of the coil. After the clamp arm is opened to the set position, the lifting mechanism is allowed to lift the clamp arm.
[0024] The clamp safety lifting device provided by the utility model can accurately obtain the relative position status of the clamp and the coil through the cooperation of the upper and lower groups of sensors, the clamping limit sensor, and the load-bearing limit sensor. The clamp then performs the next action on this basis, thereby ensuring that the coil will not be scraped over when the clamp arm moves, effectively improving the safety of the coil production lifting process.
[0025] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.
Claims
1. A fixture safety lifting device, characterized in that, It includes two symmetrically arranged left and right L-shaped clamping arms. Each clamping arm is composed of a vertically arranged clamping part and a horizontally arranged load-bearing part connected to the inner side of the lower end of the clamping part. A clamping limit sensor is arranged on the inner side of the clamping part, and a load-bearing limit sensor is arranged on the upper side of the load-bearing part. A set of upper sensors and a set of lower sensors are oppositely installed on the clamping parts of the left and right clamping arms. The installation position of the set of upper sensors is higher than that of the load-bearing limit sensor, and the installation position of the set of lower sensors is lower than that of the load-bearing limit sensor.
2. The fixture safety lifting device according to claim 1, wherein The set of upper sensors and the set of lower sensors are both glass fiber sensors.
3. A fixture safety lifting device according to claim 1, characterized in that, The set of upper sensors is composed of an upper left sensor installed on the left clamping arm and an upper right sensor installed on the right clamping arm; the set of lower sensors is composed of a lower left sensor installed on the left clamping arm and a lower right sensor installed on the right clamping arm.
4. A fixture safety lifting device according to claim 1, characterized in that, The left and right clamping arms are installed on the fixture frame and are respectively driven by left and right motor drive mechanisms for lateral movement.
5. A fixture safety lifting device according to claim 4, characterized in that, An arm encoder is arranged on the drive motor of the motor drive mechanism to measure and control the rotation angle and speed of the corresponding drive motor through the arm encoder, and further control the opening and closing movement distances of the left and right clamping arms.
6. The fixture safety lifting device according to claim 4, characterized in that, The fixture frame is installed at the lower end of the lifting mechanism of the traveling crane to perform lifting movement driven by the lifting mechanism.
7. A fixture safety lifting device according to claim 6, characterized in that, It includes a PLC controller. The clamping limit sensors, load-bearing limit sensors, upper sensors, and lower sensors on the left and right clamping arms are respectively electrically connected to the input end of the PLC controller, and the output end of the PLC control is electrically connected to the control ends of the left and right motor drive mechanisms and the lifting mechanism.