Gantry crane rotation positioning device and portal crane equipment rotation mechanism

Abstract

The utility model provides a gantry crane rotation positioning device and a gantry crane equipment rotation mechanism, and relates to the technical field of gantry crane positioning. The positioning device comprises a connecting plate, a multi-circle absolute value encoder fixed at the lower part of the connecting plate, a transparent cover mounted on the connecting plate, and a shaft end baffle mounted at the upper part of the transparent cover, the shaft end baffle is connected with the transparent cover through a fixed base to prevent the transparent cover from rotating along with the shaft end baffle; a rotating shaft of the absolute value encoder is connected with a catcher; the shaft end baffle and the catcher are fixed on the rotating bottom surface of the slip ring of the central current collector; when the rotary platform of the gantry crane rotates, the slip ring on the center current collector drives the output shaft of the multi-circle absolute value encoder to rotate, position data are recorded in the multi-circle absolute value encoder, and a rotary angle value is obtained through PLC program conversion. According to the utility model, the problems of inaccurate actual positioning and influence of various external factors in the prior art can be solved, the welding workload can be reduced, the measurement precision can be improved, and a better reference point is provided for rotation stop and anchoring positioning of the portal crane.

Description

Technical Field

[0001] The utility model relates to the technical field of portal crane positioning, in particular to a portal crane rotation positioning device and a portal crane equipment rotation mechanism. Background Art

[0002] With the advancement of technology, more port terminal equipment is developing towards the concept of green, environmental protection, intelligence and safety. Automation and unmanned operation are the inevitable trend of future development. The accuracy of mechanism positioning is particularly important. At present, the positioning of the slewing mechanism of gantry crane equipment is achieved through an absolute encoder device.

[0003] The principle of the existing rotary absolute encoder device can already meet the function of detecting and positioning the rotary angle. However, the type of the existing rotary absolute encoder positioning device has great limitations in terms of installation space. First, in practice, the installation and operation space L of the rotary support and the lower plane of the turntable is very small. Some cylinders are equipped with a lifting mechanism. In order to lift the rotating platform for maintenance, the pinion-type absolute encoder rotary positioning device cannot be installed at all; second, the crane vibrates a lot during operation, and the components such as the rotary positioning device bracket have a lot of gravity, which will affect the meshing accuracy between the gears during operation; third, the rotating pinion of the rotary positioning device has large errors in the production and assembly, and has poor flexibility. After the bracket is fixed, the gap cannot be adjusted, and as time goes by, the gears will vibrate a lot. The passage of time, coupled with the harsh on-site environment, untimely lubrication of the pinion and other factors, will cause serious wear and tear, which will also seriously affect the measurement accuracy; fourthly, during automatic positioning, the initial position of the absolute encoder will first be counted into the PLC. When the control equipment rotates a certain angle, the absolute encoder will count the stopped position data into the PLC, and the PLC will calculate the angle by calculating the difference between the two positions. However, due to installation errors, encoder transmission slippage and other reasons, the absolute encoder will produce errors, which ultimately leads to the angle position given by the PLC to the operator is not the actual angle position of the equipment. With the long-term operation of the absolute encoder, this deviation continues to accumulate and becomes larger and larger. Utility Model Content

[0004] Purpose of the utility model: to propose a slewing positioning device for a gantry crane, and to propose a slewing mechanism for a gantry crane using the slewing positioning device, so as to solve the above problems existing in the prior art.

[0005] The first aspect of the utility model provides a slewing positioning device for a portal crane, the positioning device comprising a connecting plate, a multi-turn absolute value encoder fixed to the lower part of the connecting plate, a transparent cover installed on the connecting plate, and an axial end baffle installed on the upper part of the transparent cover; the axial end baffle is connected to the transparent cover by a fixed base to prevent the transparent cover from rotating with the axial end baffle; a handle is connected to the rotating shaft of the absolute value encoder, and the axial end baffle and the handle are fixed to the bottom surface of the rotating central collector slip ring;

[0006] When the slewing table of the gantry crane rotates, the slip ring on the central collector drives the output shaft of the multi-turn absolute encoder to rotate. The multi-turn absolute encoder records the position internally and outputs data to the equipment PLC to obtain the rotation angle value.

[0007] In a further embodiment, a protective cover is installed at the lower part of the connecting plate, and the protective cover wraps the multi-turn absolute value encoder to protect the multi-turn absolute value encoder.

[0008] In a further embodiment, a universal coupling is connected to the central current collector, and the rotation center position of the portal crane is adjusted by the universal coupling.

[0009] In a further embodiment, the central current collector is mounted on a central current collector connecting bracket, and the central current collector connecting bracket is fixed to the turntable of the portal crane; the cylinder of the portal crane is fixed with a slewing bearing outer gear ring.

[0010] In a further embodiment, two sets of calibration switches are installed inside the turntable engaged with the outer gear ring of the slewing bearing. The two sets of calibration switches are arranged at 90 degrees with respect to the center line and rotate together with the turntable of the portal crane.

[0011] In a further embodiment, each set of calibration switches includes a Z-shaped connecting plate, a proximity switch sensor, a sensing plate, and a sensing plate base; two Z-shaped connecting plates and two proximity switch sensors are installed inside the turntable cylinder at 90 degrees to the center line and rotate with the turntable; at the same time, two sensing plates are installed directly below the two proximity switch sensors and fixed to the non-rotating part inside the cylinder of the gantry crane.

[0012] The second aspect of the utility model provides a gantry crane equipment slewing mechanism, which includes a motor, a turntable, a slewing bearing outer gear ring, a gantry, and also includes the gantry crane slewing positioning device as described in the first aspect. The motor drives the driving gear on the turntable to move on the slewing bearing outer gear ring, and the slewing bearing outer gear ring is fixed to the gantry and does not move.

[0013] Beneficial effects: The slewing positioning device for a gantry crane proposed in the utility model installs a slewing absolute encoder on the central collector slip ring of the central rotation, and is fixedly connected through a series of mounting accessories to maintain consistent rotation and higher precision, which can solve the problems of inaccurate actual positioning, cumbersome installation and operation, inflexible adjustment, and being affected by various external factors in the existing solution. In addition, the technical solution can reduce the welding workload, improve the measurement accuracy, and provide a better reference point for the gantry crane rotation stop anchoring positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the slewing mechanism of the gantry crane equipment.

[0015] Figure 2 Schematic diagram of the peripheral structure of the central current collector.

[0016] Figure 3 This is a schematic diagram of the installation position of the slewing positioning device of the gantry crane.

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0018] Figure 5 It is a structural schematic diagram of the slewing positioning device of the gantry crane.

[0019] Figure 6 Schematic diagram of the calibration switch of the rotary positioning device.

[0020] Figure 7 This is a diagram showing the installation location of the calibration switch.

[0021] The reference numerals in the figure are as follows: rotary positioning device 100, handle 101, hexagon screw 102, hexagon flat-end set screw 103, bolt 104, nut 105, shaft end baffle 106, transparent cover 107, connecting plate 108, hexagon socket head screw 109, absolute encoder 1010, protective cover 1011, calibration switch 200, Z-shaped connecting plate 201, fastener 202, proximity switch sensor 203, induction plate 204, induction plate base 205, driving gear 3, slewing bearing outer gear ring 4, central collector 5, central collector connecting bracket 6, motor 7, turntable 8, gantry 9. DETAILED DESCRIPTION

[0022] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0023] At present, the positioning of the slewing mechanism of the gantry crane (hereinafter referred to as "gantry crane") equipment is achieved through the absolute encoder 1010 device.

[0024] Figure 1 The display shows the structural diagram of the slewing mechanism of the gantry crane. Figure 2 for Figure 1 The schematic diagram of the AA section in FIG. 1 shows the peripheral structure of the central current collector 5. Figure 1 and Figure 2 It can be seen that the rotary motion is achieved by driving the driving gear 3 on the turntable 8 through the motor 7 to move on the rotary support outer gear ring 4, and the rotary support outer gear ring 4 is fixed on the door frame 9 and does not move.

[0025] In order to improve accuracy and reduce errors, the utility model discloses a new type of rotary positioning device 100, in which the encoder device is fixed at the bottom of the central collector 5. As the turntable 8 rotates, the slip ring on the central collector 5 drives the output shaft of the absolute encoder 1010 to rotate. The absolute encoder 1010 records the position internally and outputs data to the device PLC (programmable logic controller), converts the rotation angle value, and realizes precise positioning of the equipment.

[0026] The present embodiment discloses a gantry crane rotary positioning device 100, which is composed of a handle 101, a shaft end baffle 106, a transparent cover 107, a connecting plate 108, a multi-turn absolute encoder 1010, a protective cover 1011, and a plurality of fasteners 202 (fasteners 202 refer to standard parts for fastening and connecting bolts 104, nuts 105, washers, and screws. Due to the large number of types, they are collectively referred to as fasteners 202 below). Figure 5 shown.

[0027] The installation process of the rotary positioning device 100 is as follows: first, fix the shaft end baffle 106 and the adapter 101 on the rotating bottom surface of the central collector 5 slip ring by the hexagonal screw 102, connect and fasten the multi-turn absolute encoder 1010 and the connecting plate 108 with the hexagonal cylindrical head screw 109, and then connect and fix the multi-turn absolute encoder 1010 and the adapter 101 with the hexagonal flat-end set screw 103, and finally connect the protective cover 1011, the transparent cover 107, the connecting plate 108 and the base of the central collector 5 with the bolts 104 and nuts 105 to ensure that the overall device of the absolute encoder 1010 is fixed without shaking and runs synchronously with the slip ring.

[0028] At the same time, since installation errors cannot be completely avoided, the absolute encoder 1010 will accumulate errors after long-term operation, so two sets of calibration switches 200 are added. The calibration switch 200 is composed of a Z-shaped connecting plate 201, a fastener 202, a proximity switch sensor 203, a sensing plate 204, and a sensing plate base 205. The structure of the calibration switch 200 is as follows: Figure 6 shown.

[0029] The central collector connection bracket 6 is fixed to the gantry turntable 8, and the slewing bearing outer gear ring 4 is fixed to the gantry cylinder. When the crane equipment is not working, the two Z-shaped connecting plates 201 and the two proximity switch sensors 203 are installed inside the turntable 8 cylinder at 90 degrees with the center line, and rotate with the turntable 8. At the same time, two induction plates 204 are installed directly below the two proximity switch sensors 203 and fixed to the non-rotating part inside the gantry 9 cylinder. At this time, the absolute encoder 1010 records the initial position. When the driving gear 3 rotates, the gear engages and rotates with the slewing bearing outer gear ring 4, and the central collector connection bracket 6 and the slip ring also rotate therewith. The central collector 5 drives the output shaft of the absolute encoder 1010 to rotate as well. The absolute encoder 1010 outputs data to the PLC, and the PLC calculates the rotation angle. When the turntable 8 rotates again to the point where the two proximity switch sensors 203 simultaneously sense the two sensing plates 204 on the gantry 9, the proximity switch sensor 203 sends a command to the PLC, and the PLC forces the absolute encoder 1010 to be set. In this way, the transmission of the absolute encoder 1010 will not accumulate errors due to installation errors, slippage, etc., greatly improving the positioning accuracy. Installing the calibration switch 200 device inside the cylinder not only reduces the influence of external factors (waterproof, dustproof, anti-collision, etc.), but also makes the overall appearance more concise and beautiful, and the wiring installation process is also simpler. On the other hand, it provides a favorable reference for the anchoring of the door machine's rotary parking. The limit installation is as follows Figure 7 shown.

[0030] like Figure 3 and Figure 4 As shown, the rotary absolute encoder 1010 is installed at the bottom of the collector at the center of the door machine's rotation through the positioning component. The central collector 5 slip ring is driven to rotate through the engagement of the rotating gear, and the cam shaft of the absolute encoder 1010 is driven to rotate. After PLC data conversion, the rotary positioning function is finally accurately realized.

[0031] Combined with the technical solutions disclosed in the above embodiments, the utility model has high structural strength, stable operation, flexible installation, strong adjustability, simple parts manufacturing and assembly, reliable operation, and reduced material and labor costs. In addition, the device adds a calibration switch 200, which, on the one hand, reduces the error accumulated by the absolute encoder 1010 over a long period of time to a certain extent, greatly improves the accuracy of the rotary positioning, and on the other hand, provides a better reference point for the door machine rotation stop anchor positioning.

[0032] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A slewing positioning device for a portal crane, comprising a connecting plate, a multi-turn absolute encoder fixed to the lower part of the connecting plate, a transparent cover installed on the connecting plate, and a shaft end baffle installed on the upper part of the transparent cover; Features: The shaft end baffle is connected to the transparent cover by a fixed base to prevent the transparent cover from rotating with the shaft end baffle; a takeover is connected to the rotating shaft of the absolute encoder, and the shaft end baffle and the takeover are fixed on the bottom surface of the central collector slip ring; When the slewing platform of the gantry crane rotates, the slip ring on the central collector drives the output shaft of the multi-turn absolute encoder to rotate. The multi-turn absolute encoder records the position internally and outputs data to the equipment PLC to obtain the rotation angle value.

2. The gantry crane rotary positioning device according to claim 1, characterized in that: A protective cover is installed at the lower part of the connecting plate, and the protective cover wraps the multi-turn absolute encoder.

3. The slewing positioning device for a portal crane according to claim 1, characterized in that: The central current collector is connected with a universal coupling, and the rotation center position of the portal crane is adjusted by the universal coupling.

4. The gantry crane rotary positioning device according to claim 1, characterized in that: The central current collector is installed on a central current collector connecting bracket, and the central current collector connecting bracket is fixed to the turntable of the portal crane; the cylinder of the portal crane is fixed with a slewing bearing outer gear ring.

5. The slewing positioning device for a portal crane according to claim 4, characterized in that: Two sets of calibration switches are installed inside the outer gear ring of the slewing bearing. The two sets of calibration switches are arranged at 90 degrees with the center line and rotate together with the turntable of the portal crane.

6. The slewing positioning device for a portal crane according to claim 5, characterized in that: Each set of calibration switches includes a Z-shaped connecting plate, a proximity switch sensor, a sensing plate, and a sensing plate base; Install two Z-shaped connecting plates and two proximity switch sensors inside the turntable cylinder at 90 degrees with the center line, and rotate with the turntable; at the same time, install two induction plates directly below the two proximity switch sensors and fix them to the non-rotating part inside the cylinder of the portal crane.

7. A gantry equipment slewing mechanism, comprising a motor, a turntable, a slewing bearing outer gear ring, and a gantry; the motor drives a driving gear on the turntable to move on the slewing bearing outer gear ring, and the slewing bearing outer gear ring is fixed on the gantry cylinder and does not move; It is characterized in that It also includes a portal crane rotation positioning device as described in any one of claims 1 to 6.

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