Crown block and crown block calibration device

Abstract

The utility model relates to a crown block and a crown block calibration device, the crown block calibration device comprises a simulation track used for hanging a wheel set of the crown block to carry out calibration operation, and the simulation track comprises a supporting track, a positioning track and a detection track which are arranged in parallel; the wheel set is hung in the simulation track, the supporting track and the detection track are arranged on the two sides of a wheel set body respectively, and the positioning track is located above the wheel set. The upper surface of the supporting rail is in rolling fit with a walking wheel on one side of the wheel set, and the positioning rail is in rolling fit with a guide wheel of the wheel set and located on the same side of a detection rail of the guide wheel. The upper surface of the detection rail is slightly lower than the upper surface of the supporting rail to form a detection gap with the walking wheel on the other side. The traveling state of the crown block is simulated, then the inclination degree of the wheel set is detected through the distance relation between the detection rail and the traveling wheels of the wheel set, the inclination degree of the wheel set can be visually shown through the gap in the upper surface of the detection rail, and therefore the assembly position of the guide wheels of the wheel set can be conveniently adjusted; and the working efficiency of adjustment operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transfer overhead cranes, in particular to an overhead crane and an overhead crane calibration device. Background Art

[0002] An overhead crane generally refers to a wheeled handling device that travels on an aerial track and is widely used for material turnover in various manufacturing industries. In a semiconductor workshop, the transfer of wafers between different operation areas is mainly achieved by an overhead crane. In this scenario, grasping, lifting and other mechanisms are generally installed at the lower part of the overhead crane. After obtaining materials such as wafers, the overhead crane transports them between different operating devices along a special aerial track.

[0003] Due to process design and workshop layout reasons, the track of the overhead crane is generally not a single loop, but there are several divergent tracks for selection. In order to achieve the forking of the track, when the track forks, the track is often modified to some extent, so that when the overhead crane passes through the divergent track, its walking posture is different from the normal walking posture on the track. Under improper control of the assembly dimensions of the overhead crane, when passing through the track fork, the overhead crane may have an excessive posture tilt.

[0004] Normally, more than two overhead crane wheel sets are connected to the corresponding handling device to handle wafers. When the overhead crane wheel sets pass through the forked track successively, the tilt and jitter of the handling device may be caused due to the posture tilt, affecting the stability and reliability of wafer handling.

[0005] Therefore, when the overhead crane is put into use, it is necessary to confirm and calibrate the assembly relationship of the overhead crane wheel sets, so that when the overhead crane walks normally on the track and in the forked track, its posture is kept within the required error range to ensure the stability of wafer handling, which is achieved by finely adjusting the specific positions of several rollers in the overhead crane wheel set. Summary of the Utility Model

[0006] In order to conveniently confirm and adjust the assembly relationship of the overhead crane wheel sets, the utility model provides an overhead crane and an overhead crane calibration device.

[0007] The utility model provides an overhead crane calibration device, which includes a simulation track for hanging the wheel set of the overhead crane for calibration operation. The simulation track includes a support rail, a positioning rail and a detection rail arranged in parallel;

[0008] The wheel set is hung in the simulation track. The support rail and the detection rail are respectively arranged on both sides of the wheel set body, and the positioning rail is located above the wheel set;

[0009] The upper surface of the support rail is in rolling fit with the running wheels on one side of the wheel set, the positioning rail is in rolling fit with the guiding wheels of the wheel set, and the positioning rail is located on the same side of the detection rail as the guiding wheels; the upper surface of the detection rail is slightly lower than the upper surface of the support rail to form a detection gap with the running wheels on the other side.

[0010] Preferably, one side of the positioning rail and / or the detection rail facing the gap of the suspension wheel set has a side positioning surface, and the side positioning surface is used for rolling fit with the auxiliary wheels of the wheel set.

[0011] Preferably, a backing plate is locally arranged on the surface of the support rail so that the upper surface of the support rail is higher than the upper surface of the detection rail; or, the upper surface of the detection rail is locally grooved so that the upper surface of the support rail is higher than the upper surface of the detection rail.

[0012] The present utility model also provides a crane traveling on a track and having at least one set of wheel sets, including:

[0013] Running wheels, which are respectively arranged on both sides of the main body of the wheel set to roll on the walking rails on both sides and support the wheel set;

[0014] Guiding wheels, which are placed above the main body of the wheel set. When one side of the track is missing, the guiding wheels roll on the surface of the guiding rail of the track and support the wheel set.

[0015] Preferably, when one side of the track is missing, the guiding wheels are located on the side of the guiding rail facing the walking rail; the main body of the wheel set is located on the side where the guiding rail of the walking rail is located.

[0016] Preferably, the axis of the running wheel is horizontal, and the axis of the guiding wheel is vertical.

[0017] Preferably, it further includes auxiliary wheels, which are placed below the running wheels in the vertical height, and the auxiliary wheels can roll on the side surface of the walking rail.

[0018] During normal traveling, the auxiliary wheels assist in guiding by rolling on the side surface of the walking rail. When traveling at a fork position, in addition to rolling along the side surface of the walking rail for guiding, the auxiliary wheels are also supported by the walking rail to ensure the stable attitude of the wheel set.

[0019] The present utility model provides a calibration device for simulating the state of a wheel set of a crane when traveling on a track. It simulates the traveling state of the crane through the cooperation between the support rail and the positioning rail and the wheel set, and then detects the inclination degree of the wheel set by the distance relationship between the detection rail and the running wheels of the wheel set. The inclination degree of the wheel set can be intuitively shown through the gap on the upper surface of the detection rail, so as to facilitate the adjustment of the assembly position of the guiding wheels of the wheel set and improve the working efficiency of the adjustment operation. Ensure that the attitude error of the wheel set is within the allowable range after the support point is switched. Description of the Drawings

[0020] Figure 1 Schematic diagram of the overhead crane handling system of the present utility model;

[0021] Figure 2 Cross-sectional schematic diagram of the normal cooperation between the wheel set 22 and the track G of the present utility model;

[0022] Figure 3 Cross-sectional schematic diagram of the cooperation between the wheel set 22 and the track G of the present utility model in the case of bifurcation;

[0023] Figure 4 、 5 Schematic diagram of the structure of the overhead crane calibration device 1 of the present utility model.

[0024] In the figure:

[0025] 1: Overhead crane calibration device; 10: Simulation track; 11: Support track; 12: Positioning track; 13: Detection track; 2: Overhead crane; 21: Handling device; 22: Wheel set; 221: Running wheel; 222: Guide wheel; 223: Auxiliary wheel; G: Track; G1: Running track; G2: Guide track; GD: Bifurcation track; GS: Departure track. Specific embodiments

[0026] The following combines the drawings and specific embodiments to elaborate on the present utility model in detail. In this specification, the size ratio of the drawings does not represent the actual size ratio. It is only used to reflect the relative positional relationship and connection relationship between components. Components with the same name or the same reference numeral represent similar or identical structures, and are for illustrative purposes only.

[0027] Figure 1 Schematic diagram of the overhead crane handling system. This figure shows a schematic diagram of a track system with two bifurcation tracks at the bifurcation position. The running track G1 of the track G bifurcates from the departure track GS into two bifurcation tracks GD, and in order to achieve diversion control at the bifurcation position, a guide track G2 is also provided along the path of the bifurcation track GD. The guide track is generally arranged above the running track G1. The overhead crane 2 has a handling device 21 for handling materials such as wafers, and also has a wheel set 22 with one end connected to the handling device 21 and the other end configured to run on the track G. The wheel set 22 in each overhead crane 2 is generally one or two groups to facilitate the overhead crane 2 to turn on the track.

[0028] Figure 2The cross-sectional schematic diagram under the normal fit between the wheel set 22 and the track G is given. The track G has two sets of running rails G1 arranged in parallel under normal circumstances. A running space for the overhead crane 2 to pass through is formed between the two sets of running rails G1. The wheel set 22 of the overhead crane 2 has running wheels 221 disposed on both sides of the main body of the wheel set 22. The running wheels 221 on one side run on the running rail G1 on their respective sides of the track G. The main body of the wheel set 22 is supported by the running wheels 221 on both sides and is suspended in the running space.

[0029] Figure 3 The cross-sectional schematic diagram when the wheel set 22 and the track G are in fit under the forked condition is given. At this time, due to the need for the layout of the forked track, only one side of the running rail G1 is left on each forked track GD, and the running rail G1 on the other side is truncated. In order to ensure that the wheel set 22 advances in the preset direction and does not fall off the track G, at the forked position, a guide rail G2 is set at a certain height above the running rail G1 corresponding to the path of the forked track GD. A guide wheel 222 is set on the wheel set 22. The guide wheel runs on one side of the guide rail G2. For the wheel set 22, the moment of the supporting force of the running rail G1 on the running wheel 221 about the center of gravity of the wheel set 22 and the moment of the supporting force of the guide rail G2 on the guide wheel 222 about the center of gravity of the wheel set 22 should be opposite to ensure that the wheel set 22 can be supported on the track G. In the figure, the running wheel 221 is located on the upper surface of the running rail G1, and the guide wheel 222 is located on the side surface of the guide rail G2 facing the running rail G1. The main body of the wheel set 22 is located on the side where the running rail G1 and the guide rail G2 are located. This obviously meets the above conditions and can be stably supported and operated. Usually, the wheel set 22 is in a suspended state during operation, and its posture is fixed relative to the vertical direction under normal circumstances. Taking this as a reference, in the illustrated setting, the axial direction of the running wheel 221 is generally horizontal, and the axial direction of the guide wheel 222 is vertical.

[0030] In a preferred solution, the wheel set 22 is further provided with an auxiliary wheel 223. The auxiliary wheel 223 is disposed below the running wheel 221 in the vertical height. The auxiliary wheel 223 can roll on the surface of the running rail G1 located in the running space. During normal running, the auxiliary wheel 223 assists in guiding by rolling on the side surface of the running rail G1. When running at the forked position, in addition to guiding and rolling along the side surface of the running rail G1, the auxiliary wheel 223 is also supported by the running rail G1 to ensure the stable posture of the wheel set 22.

[0031] When the wheel set 22 is in a forked state, one side running wheel 221 does not participate in running, and its attitude control is transferred from being borne by the two running wheels 221 under normal conditions to being borne by the running wheel 221 on one side and the guiding wheel 222 above. Sometimes, the auxiliary wheel 223 also participates in attitude control. During the switching process of the above stress points, the main structural support points are transferred from the running wheels on both sides to the guiding wheel and the running wheel on one side (optionally also including the auxiliary wheel 223). Without precise adjustment and matching, the conversion of the structural support points may cause the suspension attitude of the wheel set 22 to tilt during operation, further causing the entire overhead crane 2 to tilt or vibrate, affecting the stable operation of the overhead crane 2.

[0032] In order to ensure that the attitude of the wheel set 22 is always within the control limit during the entire operation, regardless of whether the structural support points are switched, it is necessary to recalibrate the assembly dimensions of the wheel set 22 after the wheel set 22 is initially put into use or after maintenance and then put back into use, that is, to calibrate the attitude consistency of the system under the support of two different structural support points.

[0033] Figure 4 、 5It is a structural schematic diagram of the overhead crane calibration device 1. It includes a simulation track 10 for suspending the wheel set 22 for calibration operations. The simulation track 10 has a support rail 11, a positioning rail 12, and a detection rail 13 arranged in parallel. The wheel set 22 is suspended inside the simulation track 10. The support rail 11 and the detection rail 13 are placed on both sides of the main body of the wheel set 22, and the positioning rail 12 is located above the wheel set 22. The upper surface of the support rail 11 is in rolling cooperation with the running wheel 221 on one side of the wheel set 22, and the positioning rail 12 is in rolling cooperation with the guiding wheel 222 of the wheel set 22, and the positioning rail 12 is on the same side of the detection rail 13 as the guiding wheel 222. The upper surface of the detection rail 13 is slightly lower than the upper surface of the support rail 11 to form a standard detection gap. When the wheel set 22 is placed on the overhead crane calibration device 1, the suspension method of the simulation wheel set 22 at the bifurcation track of the track G is positioned by the running wheel 221 and the guiding wheel 222 on one side. The inclination degree under normal running conditions is confirmed by the gap value between the running wheel 221 on the other side and the surface of the detection rail 13, which can usually be obtained by detecting the gap between the running wheel 221 and the detection rail 13 using a feeler gauge. The installation position of the rollers of the wheel set 22 is adjusted according to the gap value, so that the gap value between the running wheel 221 and the detection rail 13 meets the tolerance requirements, and the calibration operation is realized. In the actual calibration operation, the radial position of the guiding wheel 222 can be finely adjusted by adjusting the position of its fixing part. When the guiding wheel 222 is finely adjusted and moved in the normal direction of the surface of the positioning rail 12, the actual inclination degree of the wheel set 22 is correspondingly changed when it is again in contact with and supported on the positioning rail 12 and is reflected in the gap between the running wheel 221 and the detection rail 13. In order to realize the position adjustment of the guiding wheel 222, different thickness gaskets are usually prepared during the actual calibration process, and the position adjustment of the guiding wheel 222 is indirectly realized by adding the gaskets to the mounting seat of the guiding wheel 222. Preferably, the positioning rail 12 and the detection rail 13 have side positioning surfaces on the side facing the gap of the suspended wheel set 22, and the side positioning surfaces are used for rolling cooperation with the auxiliary wheel 223 of the wheel set 22.

[0034] When in use, the overhead crane is pushed onto the calibration device. A backing plate is installed on the support rail 11 in advance, so that the upper surface of the support rail 11 is slightly higher than the upper surface of the detection rail 13. The running wheel 221 on one side of the overhead crane presses on the backing plate, then the running wheel 221 on the other side is in a suspended state, and its suspended gap S can be measured by a feeler gauge. According to the calibration standard, gaskets with appropriate thickness are inserted behind the guiding wheel limit block to change the suspended gap S until it meets the required value. The gasket is designed to be open-type and can be inserted after loosening the fixing bolt of the limit block, which can greatly improve the operation efficiency.

[0035] The above content is only a description of the preferred embodiments of the present utility model, and does not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An overhead crane calibration device, characterized in that, It includes a simulation track (10) for calibrating the wheel set (22) used to suspend the overhead crane (2). The simulation track (10) includes support rails (11), positioning rails (12), and detection rails (13) arranged in parallel. The wheel set (22) is suspended inside the simulation track (10). The support rails (11) and the detection rails (13) are respectively disposed on both sides of the main body of the wheel set (22), and the positioning rail (12) is located above the wheel set (22). The upper surface of the support rail (11) is in rolling fit with the running wheels (221) on one side of the wheel set (22). The positioning rail (12) is in rolling fit with the guide wheels (222) of the wheel set (22), and the positioning rail (12) is on the same side as the detection rail (13) of the guide wheels (222). The upper surface of the detection rail (13) is slightly lower than the upper surface of the support rail (11) to form a detection gap with the running wheels (221) on the other side.

2. The overhead crane calibration device according to claim 1, wherein, One side of the positioning rail (12) and / or the detection rail (13) facing the gap where the wheel set (22) is suspended has a side positioning surface, and the side positioning surface is used for rolling fit with the auxiliary wheels (223) of the wheel set (22).

3. The overhead crane calibration device according to claim 1, characterized in that, Local pads are provided on the surface of the support rail (11) so that the upper surface of the support rail (11) is higher than the upper surface of the detection rail (13); or, the upper surface of the detection rail (13) is locally grooved so that the upper surface of the support rail (11) is higher than the upper surface of the detection rail (13).

4. An overhead crane travels on a track and has at least one set of wheel sets (22), characterized in that, The wheel set (22) includes: Running wheels (221) which are respectively disposed on both sides of the main body of the wheel set (22) to roll on the running rails (G1) on both sides and support the wheel set (22). Guide wheels (222) which are disposed above the main body of the wheel set (22). When one side of the track is missing, the guide wheels (222) roll on the surface of the guide rail (G2) of the track and support the wheel set (22).

5. The overhead crane according to claim 4, characterized in that, When one side of the track is missing, the guide wheels (222) are located on the side of the guide rail (G2) facing the running rail (G1); the main body of the wheel set (22) is located on the side where the guide rail (G2) of the running rail (G1) is located.

6. The overhead crane according to claim 4, characterized in that, The axis of the running wheel (221) is horizontal, and the axis of the guide wheel (222) is vertical.

7. The overhead crane according to any one of claims 4 to 6, characterized in that, It further includes auxiliary wheels (223). The auxiliary wheels (223) are disposed below the running wheels (221) in the vertical height, and the auxiliary wheels (223) can roll on the side of the running rail (G1).

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