Crown block carrying system and carrying method thereof

Abstract

The invention discloses a crown block carrying system and a carrying method thereof.The crown block carrying system comprises a crossed track section, an auxiliary track is arranged above the crossed track section, the auxiliary track is connected with a switching mechanism driving the auxiliary track to horizontally rotate to switch the position, the auxiliary track extends in the first direction when at the first position, and the auxiliary track extends in the second direction when at the second position. The auxiliary track extends along a second direction; a front auxiliary wheel and a rear auxiliary wheel which can move on the auxiliary track are arranged on the crown block; when the front walking wheel of the crown block moving in the first direction or the second direction moves and passes through the crossed gap of the crossed track section, the front auxiliary wheel is located on the auxiliary track at the first position or the second position; and when the rear traveling wheels of the crown block moving along the first direction or the second direction are positioned at the crossed gap, the rear auxiliary wheels are positioned on the auxiliary track at the first position or the second position. A structure for driving the auxiliary track to ascend and descend is not needed, the equipment cost and the use cost are lower, and the switching efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the field of automatic material handling, in particular to an overhead crane handling system and its handling method. Background Art

[0002] The overhead crane handling system (OHT system) is an important device for material handling in an automatic processing plant. As shown in the patent document with the application publication number CN114388411A, it realizes the handling of materials between different positions by moving an overhead crane with functions such as material grasping, lifting, and walking on a track suspended below the ceiling.

[0003] The track is an essential component in the overhead crane handling system, and the track needs to be laid out according to the equipment distribution in the factory. In some track layouts, there will be at least one cross-shaped cross-track section, and there will be a cross gap in the middle of the cross-track section. Therefore, when the walking wheels of the overhead crane move to the cross gap of the cross-track section, they will fall into the cross gap and cause the overhead crane to be unable to continue moving.

[0004] To solve such problems, the patent document with the application publication number CN116280946A discloses a cross-track section structure for an OHT system. In this structure, auxiliary tracks are provided to selectively dock with the tracks in the X-axis direction and the tracks in the Y-axis direction.

[0005] Although this structure can effectively ensure the passage of the overhead crane at the cross-track section, there are still certain problems with this structure. For example: The structure of the auxiliary track is relatively complex. And since the auxiliary track needs to be docked with the tracks in the X-axis direction and the tracks in the Y-axis direction without gaps, in addition to rotating, the auxiliary track also needs to be lifted to smoothly achieve switching. This requires a complex piston structure to drive the lifting of the auxiliary track, increasing the equipment cost and operating cost, and also requires a larger height space. Further, each time the auxiliary track is switched, it requires three actions: rising, rotating, and descending, which takes a longer action time and greatly affects the passage efficiency at the cross-track section. Summary of the Invention

[0006] The purpose of the present invention is to solve the above problems existing in the prior art, and provide an overhead crane handling system and its handling method.

[0007] The purpose of the present invention is achieved through the following technical solutions: The overhead crane handling system includes an overhead track and an overhead crane running on the track. The track includes a crossing track section, and an auxiliary track is arranged above the crossing track section. The auxiliary track is connected to a switching mechanism that drives it to horizontally rotate and switch between a first position and a second position. In the first position, the auxiliary track extends in a first direction, and in the second position, the auxiliary track extends in a second direction. The first direction is the extension direction of the first track of the crossing track section, and the second direction is the extension direction of the second track of the crossing track section. The overhead crane is provided with a front auxiliary wheel and a rear auxiliary wheel that can move on the auxiliary track. When the front running wheel of the overhead crane moving in the first direction moves past the crossing gap of the crossing track section, the front auxiliary wheel of the overhead crane moves on the auxiliary track in the first position. When the rear running wheel of the overhead crane moves past the crossing gap, the rear auxiliary wheel of the overhead crane moves on the auxiliary track in the first position. When the front running wheel of the overhead crane moving in the second direction moves past the crossing gap of the crossing track section, the front auxiliary wheel of the overhead crane moves on the auxiliary track in the second position. When the rear running wheel of the overhead crane moves past the crossing gap, the rear auxiliary wheel of the overhead crane moves on the auxiliary track in the second position.

[0008] Preferably, the length of the auxiliary track is such that before the front running wheel moves to the crossing gap, the front auxiliary wheel has already moved onto the auxiliary track, and before the rear running wheel moves to the crossing gap, the rear auxiliary wheel has already moved onto the auxiliary track.

[0009] Preferably, at least one front guide wheel and at least one rear guide wheel adapted to the auxiliary track are arranged on the top of the overhead crane. When the front guide wheel of an overhead crane moves past the crossing gap, the front guide wheel rolls and adheres to one side of the auxiliary track deviating from the front auxiliary wheel. When the rear guide wheel of the overhead crane moves past the crossing gap, the rear guide wheel rolls and adheres to one side of the auxiliary track deviating from the rear auxiliary wheel.

[0010] Preferably, a mounting plate is arranged above the crossing track section, and a support rail adapted to the positions of the front auxiliary wheel and the rear auxiliary wheel is arranged at the bottom of the mounting plate. When the front running wheel of an overhead crane moves past the crossing gap, the rear auxiliary wheel of the overhead crane adheres to the bottom of the upstream support rail. When the rear running wheel of the overhead crane moves past the crossing gap, the front auxiliary wheel of the overhead crane adheres to the bottom of the downstream support rail.

[0011] Preferably, a first sensor and a second sensor are provided at the first track and the second track on each side. The second sensor is closer to the crossover gap than the first sensor. The distance between the second sensor and the crossover gap is such that when the rear traveling wheel of the overhead crane triggers the second sensor, the front auxiliary wheel on the overhead crane is located outside the entry end of the auxiliary track in the switched-in position.

[0012] Preferably, when the front traveling wheel of the overhead crane triggers the second sensor at the first track or the second track upstream, the overhead crane decelerates.

[0013] Preferably, when the control system determines that an overhead crane is allowed to pass through a crossover track section, it blocks the crossover track section; when it determines that the rear traveling wheel of the overhead crane triggers the second sensor at the first track or the second track downstream, the control system releases the block of the crossover track section.

[0014] Preferably, a wheel groove and a clamping groove located above the wheel groove are formed on the auxiliary track. When the auxiliary track is in the first position, the first support block is embedded in the clamping groove to provide support for the auxiliary track. When the auxiliary track is in the second position, the second support block is embedded in the clamping groove to provide support for the auxiliary track.

[0015] Preferably, the clamping grooves are distributed on both sides of the auxiliary track. When the auxiliary track is in the first position, the first support blocks are respectively embedded in the clamping grooves on both sides; when the auxiliary track is in the second position, the second support blocks are respectively embedded in the clamping grooves on both sides.

[0016] The present invention also discloses a handling method based on the overhead crane handling system as described above. When the control system determines that an overhead crane is allowed to pass through a crossover track section, it determines whether the auxiliary track is in the accurate position. If so, the auxiliary track is not adjusted. If not, the auxiliary track is driven to rotate self - horizontally by a switching mechanism to switch to the accurate position.

[0017] The advantages of the technical solution of the present invention are mainly reflected in: The present invention only needs to set a simple auxiliary track and provide matching front auxiliary wheels and rear auxiliary wheels on the overhead crane to ensure that the overhead crane can smoothly pass through the crossover track section. The structure of the auxiliary track of the present invention is greatly simplified compared with the structure of the auxiliary track in the prior art and is easier to implement. At the same time, the structure of the present invention only needs to rotate the auxiliary track horizontally and does not need to lift the auxiliary track. Therefore, there is no need for a structure to drive the auxiliary track to lift, the structure is simpler, the equipment cost and the use cost are lower, the required height space is less, and the switching efficiency is higher, thus facilitating the improvement of the passing efficiency at the crossover track section.

[0018] In the present invention, front and rear guide wheels are provided on the overhead crane. When the front guide wheel and the rear guide wheel of the overhead crane move through the crossing gap, the front end and the rear end of the traveling mechanism of the overhead crane can be guided and limited by the front guide wheel and the rear guide wheel, reducing the shaking at both ends of the traveling mechanism, and effectively ensuring the stability and safety of the overhead crane when operating in the crossing track section.

[0019] In the present invention, a mounting plate is provided above the crossing track section, which can not only facilitate the installation of the switching mechanism, but also a support rail is provided at the bottom of the mounting plate, which can effectively cooperate with the front auxiliary wheel and the rear auxiliary wheel to limit the inclination of the overhead crane. Even when the auxiliary track cannot fully support the front auxiliary wheel and the rear auxiliary wheel, the inclination of the overhead crane can be effectively avoided, so as to ensure that the front traveling wheels and the rear traveling wheels of the overhead crane can smoothly pass through the crossing gap, providing double guarantees and better safety. Such a structure can also effectively reduce the loads borne by the auxiliary track and the switching mechanism, which is beneficial to protecting the auxiliary track and the switching mechanism.

[0020] In the present invention, first sensors and second sensors are provided on both the first track and the second track of the crossing track section, which can effectively identify the position and state of the overhead crane at the crossing track section, so as to accurately carry out precise control, prevent the occurrence of collision accidents, and can control the running speed of the overhead crane according to the position of the overhead crane and the switching state of the auxiliary track, reducing the start-stop times of the overhead crane while ensuring the moving efficiency of the overhead crane.

[0021] In the present invention, through the structural design of the auxiliary track and supporting the auxiliary track by the first support block and the second support block that match its structure, it can effectively ensure that the auxiliary track provides sufficient support for the overhead crane. At the same time, it avoids the switching mechanism from bearing large loads, which is beneficial to ensuring the safe and reliable operation of the whole mechanism. And by providing support on both sides of the auxiliary track through the support blocks on both sides, it can effectively ensure the supportability and balance of the auxiliary track, thus better protecting the switching mechanism. Description of the Drawings

[0022] Figure 1 is the first perspective three-dimensional view of the overhead crane adapted to the auxiliary track driven by the switching mechanism provided at the crossing track section of the present invention; Figure 2 is a schematic diagram of the front traveling wheel of the overhead crane moving to the crossing gap and the front auxiliary wheel moving to the auxiliary track when the overhead crane moves in the first direction in the present invention; Figure 3 is the force analysis diagram of the front traveling wheel of the overhead crane moving to the crossing gap and the front auxiliary wheel moving to the auxiliary track in the present invention; Figure 4 is the force analysis diagram of the rear traveling wheel of the overhead crane moving to the crossing gap and the rear auxiliary wheel moving to the auxiliary track in the present invention; Figure 5 is the end view of the auxiliary track of the present invention; Figure 6 is the end view of the present invention; Figure 7 is the second perspective three - dimensional view of the present invention where an auxiliary track driven by a switching mechanism and a crane adapted thereto are provided at the crossover track section; Figure 8 is the position relationship diagram of the auxiliary track in the first position of the present invention and its relationship with the first support block and the second support block; Figure 9 is the position relationship diagram of the auxiliary track in the second position of the present invention and its relationship with the first support block and the second support block; Figure 10 is the force - analysis diagram of the present invention where the front traveling wheels of the crane move to the crossover gap, the front auxiliary wheels move onto the auxiliary track, and the rear auxiliary wheels are attached under the upstream support rail; Figure 11 is the force - analysis diagram of the present invention where the rear traveling wheels of the crane move to the crossover gap, the rear auxiliary wheels move onto the auxiliary track, and the front auxiliary wheels are attached under the downstream support rail. Detailed implementation manners

[0023] The objectives, advantages, and features of the present invention will be illustrated and explained through the non - restrictive description of the following preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection required by the present invention.

[0024] In the description of the solution, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Embodiment 1 The following describes the crane handling system disclosed by the present invention with reference to the drawings, as shown in the attached Figure 1As shown in the figure, it includes an overhead track and an overhead crane 100 running on the track. The track includes a cross-track section 200, and the structure of the cross-track section 200 is the same as the prior art cited in the background art. It includes a first track 201 and a second track 202 distributed in a cross shape. The first track 201 extends horizontally along the first direction X, and the second track 202 extends horizontally along the second direction Y. A square cross-gap 203 is formed in the central area of the cross-track section 200. Two pairs of the first tracks 201 are distributed on opposite sides of the cross-gap, and two pairs of the second tracks 202 are distributed on the other two sides of the cross-gap.

[0026] Similar to the prior art, as shown in the appendix Figure 1 As shown in the figure, the overhead crane 100 includes a traveling mechanism 110 located at the upper part of the overhead crane 100. The traveling mechanism 110 includes two pairs of traveling wheels and at least one pair of guiding wheels located below each pair of traveling wheels. For the convenience of description, when the overhead crane 100 moves forward, the pair of traveling wheels at the front is defined as the front traveling wheels 111, and the pair of traveling wheels at the back is defined as the rear traveling wheels 112. The guiding wheel close to the front traveling wheels 111 is defined as the front guiding wheel 113, and the guiding wheel close to the rear traveling wheels 112 is defined as the rear guiding wheel 114.

[0027] In order to avoid the problem that the front and rear traveling wheels of the overhead crane 100 move to the cross-gap 203 and cannot smoothly pass through the cross-gap 203 due to gravity fall when moving to the cross-gap 203, the creative improvement of the present invention lies in: As shown in the appendix Figure 1 and the appendix Figure 2 As shown in the figure, an auxiliary track 300 is provided above the cross-track section 200. The auxiliary track 300 is connected to a switching mechanism 400 that drives it to rotate horizontally and switch between a first position and a second position. In the first position, the auxiliary track 300 extends along the first direction X, and in the second position, the auxiliary track 300 extends along the second direction Y.

[0028] At the same time, in order to cooperate with the auxiliary track 300, a front auxiliary wheel 115 and a rear auxiliary wheel 116 that can move on the auxiliary track 300 are provided on the traveling mechanism of the overhead crane 100; When the front traveling wheels 111 of the overhead crane 100 moving along the first direction move past the cross-gap 203 of the cross-track section 200, the front auxiliary wheel 115 of the overhead crane 100 moves on the auxiliary track 300 at the first position; when the rear traveling wheels 112 of the overhead crane 100 move past the cross-gap 203, the rear auxiliary wheel 116 of the overhead crane 100 moves on the auxiliary track 300 at the first position.

[0029] When the front running wheel 111 of the overhead crane 100 moving in the second direction moves past the crossover gap 203 of the crossover track section 200, the front auxiliary wheel 115 of the overhead crane 100 moves on the auxiliary track 300 at the second position; when the rear running wheel 112 of the overhead crane 100 moves past the crossover gap 203, the rear auxiliary wheel 116 of the overhead crane 100 moves on the auxiliary track 300 at the second position.

[0030] Thus, as shown in the appendix Figure 3 When the front running wheel 111 moves past the crossover gap 203, the front running wheel 111 is subject to a downward first gravity G1, while the front auxiliary wheel 115 of the overhead crane 100 is located on the auxiliary track 300. Therefore, the front auxiliary wheel 115 is subject to an upward first support force F2 exerted by the auxiliary track. At this time, since the rear running wheel 112 of the overhead crane 100 is still on one side of the first track 201 or the second track 202, that is, the rear running wheel 112 is subject to an upward second support force F1 exerted by the first track or the second track, there is support at both the front and the rear of the running mechanism 110. Thus, the front side of the running mechanism 110 will not fall downward due to gravity. Therefore, the front running wheel 111 can smoothly pass through the crossover gap 203 without falling.

[0031] When the overhead crane 100 continues to move forward and the rear running wheel 112 of the overhead crane 100 moves past the crossover gap 203, as shown in the appendix Figure 4 When the rear running wheel 112 moves past the crossover gap 203, the rear running wheel 112 is subject to a downward second gravity G2, while the rear auxiliary wheel 116 is on the auxiliary track 300, and the auxiliary track 300 exerts an upward third support force F4 on the rear auxiliary wheel 116. At this time, since the front running wheel 111 of the overhead crane 100 is on the first track 201 or the second track 202 on the other side, the first track 201 or the second track 202 exerts an upward fourth support force F3 on the front running wheel 111. So, there is support at both the front and the rear of the running mechanism 110, and the rear side of the running mechanism 110 will not fall downward due to gravity. Therefore, the rear running wheel 112 can smoothly pass through the crossover gap 203 without falling.

[0032] Specifically, as shown in the appendix Figure 2 and the appendix Figure 5 and the appendix Figure 6As shown, the auxiliary track 300 is a straight track, and the auxiliary track 300 includes a wheel groove. The wheel groove may be a notch 310 extending a certain distance from one side of the auxiliary track 300 to the other side. Both ends of the notch 310 extend to both ends of the auxiliary track. Thus, the cross-section of the auxiliary track 300 is approximately C-shaped. Also, in order to limit the front auxiliary wheel 115 and the rear auxiliary wheel 116, a limiting strip 320 is provided on the bottom surface of the notch 310 on its outer side. The part of the bottom surface between the limiting strip 320 and the inner side surface of the notch 310 is the wheel running surface 311 for the front auxiliary wheel 115 and the rear auxiliary wheel 116 to run. The width of the wheel running surface 311 may be greater than the thickness of the front auxiliary wheel 115 and the rear auxiliary wheel 116, so that after the auxiliary track 300 rotates, the front auxiliary wheel 115 and the rear auxiliary wheel 116 can be more easily aligned with the wheel running surface 311.

[0033] The length and position of the auxiliary track 300 can be designed as required. Preferably, as shown in the appendix Figure 2 As shown, the length of the auxiliary track 300 is greater than the side length of the crossing gap 203, and both ends of the auxiliary track 300 extend to the outside of the two opposite sides of the crossing gap 203. More preferably, the length and position of the auxiliary track 300 satisfy that before the front running wheel 111 moves to the crossing gap 203, the front auxiliary wheel 115 has already moved onto the auxiliary track 300, and before the rear running wheel 112 moves to the crossing gap 203, the rear auxiliary wheel 116 has already moved onto the auxiliary track 300. Also, the wheel running surface of the auxiliary track 300 is preferably located at the center position of the crossing track section. Of course, this is not necessary.

[0034] As shown in the appendix Figure 1 As shown, in order to facilitate the installation of the switching mechanism 400, a mounting plate 500 is provided above the crossing track section 200. The position of the mounting plate 500 is fixed, and the shape of the mounting plate 500 can be designed as required. The switching mechanism 400 is mounted on the mounting plate 500.

[0035] The specific structure of the switching mechanism 400 can be designed as required. For example, in one embodiment, the switching mechanism 400 includes a motor 410, a speed reducer 420 connected to the motor 410 and fixed on the mounting plate 500. The power output shaft 421 of the speed reducer 420 extends in the vertical direction, passes through the mounting plate 500 and is connected to the auxiliary track 300. The power output shaft 421 can be connected to the auxiliary track through an adapter block. The connection position between the power output shaft and the auxiliary track 300 can be designed as required. Preferably, the axis of the power output shaft passes through the center of the wheel running surface 311. At this time, the axis of the power output shaft coincides with the center line of the cross-track section. Of course, this is not necessary. Making the axis of the power output shaft pass through the center of the wheel running surface 311 can more conveniently ensure that after the auxiliary track 300 rotates 90 degrees, it can be aligned with the front auxiliary wheels 115 and rear auxiliary wheels 116 on the overhead crane 100 moving in the first direction and the overhead crane 100 moving in the second direction, and at the same time, it also lays a foundation for the design of other subsequent structures.

[0036] Of course, in another embodiment, the switching mechanism 400 may also include a rotating shaft (not shown in the figure) rotatably provided on the mounting plate 500 through a bearing. The installation position of the rotating shaft is the same as the position of the above-mentioned power output shaft. The rotating shaft is connected to the auxiliary track 300. At the same time, a driving mechanism (not shown in the figure) for driving the rotating shaft to rotate is provided on the mounting plate. The driving mechanism is, for example, a reduction motor or a structure composed of a motor and a gear transmission mechanism or a synchronous belt transmission mechanism, etc., which is not limited here.

[0037] As shown in the appendix Figure 2 As shown in the figure, the switching mechanism 400 further includes a position detection mechanism for determining the position of the auxiliary track. The position detection mechanism includes a trigger 430, a first detection sensor 440 and a second detection sensor (not shown in the figure) that cooperate with the trigger 430. The trigger 430 is provided on the auxiliary track. The first detection sensor 440 and the second detection sensor are known proximity switches, which are provided at the bottom of the mounting plate. When the auxiliary track is in the first position, the first detection sensor can detect the trigger 430. When the auxiliary track is in the second position, the second detection sensor can detect the trigger 430.

[0038] As shown in the appendix Figure 1As shown, the front auxiliary wheel 115 is arranged on the top of the traveling mechanism 110 and is higher than the front traveling wheel 111 through a mounting frame 117. The axis of the front auxiliary wheel 115 is parallel to the axis of the front traveling wheel 111 and is located in front of the front traveling wheel 111. Of course, this is not necessary. For example, the front auxiliary wheel 115 can also be located directly above or inside the front traveling wheel 111. The rear auxiliary wheel 116 is directly opposite to the rear auxiliary wheel 116 in the moving direction of the overhead travelling vehicle 100. It is arranged on the top of the traveling mechanism 110 through another mounting frame 117. The axis of the rear auxiliary wheel 116 is parallel to the axis of the front auxiliary wheel 115 and is at the same height. The outer diameters of the front auxiliary wheel and the rear auxiliary wheel are the same. The rear auxiliary wheel 116 is located on the rear side of the rear traveling wheel 112. Of course, this is also not necessary. For example, the rear auxiliary wheel 116 can be located inside or directly above the rear traveling wheel 112.

[0039] The positions of the front auxiliary wheels 115 and the rear auxiliary wheels 116 in the width direction (axial direction of the running wheels) of the overhead travelling vehicle 100 can be designed as required. Preferably, the front auxiliary wheels 115 and the rear auxiliary wheels 116 are arranged in the middle of the width direction of the overhead travelling vehicle 100, but this is not necessary. The position of the auxiliary track 300 can be adaptively designed according to the positions of the front auxiliary wheels and the rear auxiliary wheels.

[0040] Furthermore, when the front guide wheel 113 and the rear guide wheel 114 of the overhead crane 100 move to the cross gap 203, since there is no side surface cooperating with the front guide wheel 113 and the rear guide wheel 114, the front guide wheel 113 and the rear guide wheel 114 will not be able to play the role of guiding and limiting the front and rear sides of the traveling mechanism 110. At this time, the front and rear sides of the traveling mechanism 110 are prone to shaking due to the lack of limitation.

[0041] Therefore, in order to avoid this situation, the attached Figure 1 , Attachment Figure 6 As shown, at least one front guide wheel 118 and at least one rear guide wheel 119 adapted to the auxiliary rail 300 are arranged on the top of the overhead travelling vehicle 100, the axes of the front guide wheel 118 and the rear guide wheel 119 are parallel to the axes of the front guide wheel 113 and the rear guide wheel 114, and there are two front guide wheels 118 and two rear guide wheels 119 respectively and they are distributed along the moving direction of the overhead travelling vehicle. When the front guide wheel 113 moves through the intersecting gap 203, the front guide wheel 118 rolls and sticks to the side of the auxiliary rail 300 that deviates from the front auxiliary wheel; when the rear guide wheel 119 moves through the intersecting gap 203, the rear guide wheel 114 rolls and sticks to the side of the auxiliary rail that deviates from the rear auxiliary wheel.

[0042] When the front auxiliary wheel and the rear auxiliary wheel 116 move on the auxiliary track 300, the switching mechanism 400 and the auxiliary track need to bear a certain load, which affects the safety and stability of their structures. Therefore, in order to reduce the load on the switching mechanism 400, the inventor found through research that additional supporting forces can be provided to the auxiliary track 300 at different positions. Specifically, as shown in the appendix Figure 5 - Appendix Figure 7 As shown, a clamping groove 330 is provided on the auxiliary track 300 above the wheel groove and with the notch on the side of the auxiliary track 300. When the auxiliary track 300 is in the first position, the first support block 600 is embedded in the clamping groove 330 to provide support for the auxiliary track 300. When the auxiliary track 300 is in the second position, the second support block 700 is embedded in the clamping groove 330 to provide support for the auxiliary track 300.

[0043] As shown in the appendix Figure 5 As shown, the clamping groove 330 can be a through groove extending along the length direction of the auxiliary track 300, or a short groove corresponding to the positions of the first support block 600 and the second support block 700. The first support block 600 and the second support block 700 are fixed to the bottom of the mounting plate 500, and they are both L-shaped. The first convex part 610 of the first support block 600 faces the support rail 800 extending along the first direction described below, and the second convex part 710 of the second support block 700 faces the support rail 800 extending along the second direction described below. The number and positions of the first support block 600 and the second support block 700 can be designed according to needs.

[0044] In order to better support the auxiliary track 300, as shown in the appendix Figure 5 As shown, the clamping grooves 330 are distributed on both sides of the auxiliary track 300. When the auxiliary track 300 is in the first position, the first support blocks 600 are respectively embedded at the clamping grooves 330 on both sides, as shown in the appendix Figure 8 As shown; when the auxiliary track 300 is in the second position, the second support blocks 700 are respectively embedded at the clamping grooves 330 on both sides, as shown in the appendix Figure 9As shown. For the convenience of description, the card slot 330 located on the left side of the auxiliary track 300 is defined as the first card slot, and the card slot 330 located on the right side of the auxiliary track 300 is defined as the second card slot. The first card slot and the wheel slot are on the same side of the auxiliary track 300. Moreover, the first card slot is the top area of the notch 310. Therefore, the height of the notch 310 is greater than the outer diameters of the front auxiliary wheel 115 and the rear auxiliary wheel 116. At the same time, when the first convex part of the first support block 600 and the second convex part of the second support block 700 are embedded in the first card slot, they do not interfere with the movement of the front auxiliary wheel 115 and the rear auxiliary wheel 116 on the auxiliary track 300. At this time, the distribution of the first support block 600 and the second support block 700 can be as shown in the attached Figure 8 , attached Figure 9 As shown. Both the first support block 600 and the second support block 700 are two. The two first support blocks 600 are distributed on the left and right sides of the axis (power output shaft 421) around which the auxiliary track 300 rotates. The two second support blocks 700 are distributed on the upper and lower sides of the axis (power output shaft 421) when the auxiliary track 300 rotates. When the auxiliary track 300 needs to rotate from the first position to the second position, the auxiliary track 300 is rotated counterclockwise. When the auxiliary track 300 needs to switch from the second position to the first position, the auxiliary track 300 is rotated clockwise.

[0045] Moreover, in order to facilitate the first support block 600 and the second support block 700 to be smoothly embedded into the card slot 330 of the auxiliary track 300, and at the same time avoid the wear of the first support block 600 and the second support block 700 from affecting the environment in the clean room, the first support block 600 and the second support block 700 are plastic blocks, preferably nylon blocks or polytetrafluoroethylene blocks.

[0046] To better avoid the tilt of the overhead crane, as shown in the attached Figure 1 , attached Figure 6 As shown, the mounting plate 500 is a cross-shaped plate member located directly above the cross-track section. At the bottom of the mounting plate, there is a support rail 800 adapted to the positions of the front auxiliary wheel and the rear auxiliary wheel. The support rail 800 is four sections and is arranged in a cross shape. The four sections of the support rail 800 are divided into two pairs. The first pair extends in the first direction. The two support rails 800 of the first pair are symmetrically distributed outside the two ends of the auxiliary track in the first position and correspond to the position of the auxiliary track in the first position. The second pair extends in the second direction and corresponds to the positions of the front auxiliary wheel and the rear auxiliary wheel on the overhead crane moving in the second direction. The two support rails 800 of the second pair are symmetrically distributed outside the two ends of the auxiliary track in the second position and are tangent to the position of the auxiliary track in the second position.

[0047] Thus, whether the overhead crane moves in the first direction or the second direction, when the front traveling wheels on the overhead crane move past the crossover gap, the rear auxiliary wheels of the overhead crane are in contact with the bottom of the upstream support rail; when the rear traveling wheels of the overhead crane move past the crossover gap, the front auxiliary wheels of the overhead crane are in contact with the bottom of the downstream support rail.

[0048] For ease of explanation, the two support rails 800 extending in the first direction are sequentially defined as the upstream support rail 810 and the downstream support rail 820 in the order of passing when the overhead crane moves. When the front traveling wheel 111 of an overhead crane moving in the first direction moves past the crossover gap, the rear auxiliary wheel rolls and contacts the bottom of the upstream support rail 810. At this time, as shown in the appendix Figure 10 As shown, in addition to the auxiliary track 300 applying an upward first support force F2 to the front auxiliary wheel 115, the upstream support rail 810 applies a downward first pressure F5 to the rear auxiliary wheel 116 to prevent the rear auxiliary wheel from tilting upward, thereby better avoiding the tilting of the overhead crane and reducing the load borne by the auxiliary track at the same time.

[0049] When the rear traveling wheel 112 of the overhead crane moves past the crossover gap, the front auxiliary wheel is in contact with the bottom of the downstream support rail 820. As shown in the appendix Figure 11 As shown, at this time, in addition to the auxiliary track 300 applying an upward third support force F4 to the rear auxiliary wheel 116, the downstream support rail 820 applies a downward second pressure F6 to the front auxiliary wheel to prevent the front auxiliary wheel from tilting upward, thereby better avoiding the tilting of the overhead crane and reducing the load borne by the auxiliary track at the same time.

[0050] Since only one overhead crane 100 can pass through the crossover track section 200 at a time, in order to effectively control the safety of passing and the position switching of the auxiliary track 300, as shown in the appendix Figure 1 As shown, a first sensor 204 and a second sensor 205 are respectively provided at the first track 201 and the second track 202 on each side. The second sensor 205 is closer to the crossover gap 203 than the first sensor 204. The first sensor 204 and the second sensor 205 can be designed as needed, such as opposed sensors, proximity sensors, or self-reflective sensors and reflectors, etc., which are not limited here.

[0051] The four first sensors 204 and the four second sensors 205 are all connected to the control system. When the control system determines that it allows an overhead crane 100 to pass through a crossover track section, it blocks the crossover track section 200; when it determines that the rear traveling wheel 112 of the overhead crane 100 triggers the second sensor 205 at the downstream first track 201 or second track 202, the control system releases the block of the crossover track section 200.

[0052] For example, when a No. 1 overhead crane moves in the first direction until its front running wheels 111 trigger the first sensor 204 at the first track 201 upstream, at this time, if the control system determines that no other overhead crane 100 is passing through the cross-track section 200 and no other overhead crane 100 is waiting to pass through the cross-track section 200 in front of the No. 1 overhead crane, then the control system determines to allow the No. 1 overhead crane to pass through the cross-track section 200 and block the cross-track section 200, that is, no other overhead crane 100 is allowed to pass through the cross-track section 200. At the same time, the control system determines whether the position of the auxiliary track 300 is in the correct position, that is, whether it is in the first position. When it is determined that the auxiliary track is in the first position, there is no need to adjust the auxiliary track. When it is determined that the auxiliary track 300 is not in the first position, the control system controls the switching mechanism 400 to drive the auxiliary track 300 to rotate self to switch to the first position. While the No. 1 overhead crane moves forward. At the same time, the control system detects in real time whether a No. 2 overhead crane moving in the second direction needs to pass through the cross-track section 200. When the No. 1 and No. 2 overhead cranes trigger the first sensor 204 on the second track 202 upstream, the control system sends a stop and wait instruction to the No. 2 overhead crane. When the No. 1 overhead crane moves onto the downstream first track 201 and the rear running wheels of the No. 1 overhead crane trigger the first sensor 204 on the downstream first track, the control system determines that the No. 1 overhead crane has passed through the cross-track section 200. At this time, the blockade of the cross-track section 200 is released, that is, the next overhead crane is allowed to pass through the cross-track section. When the control system determines that the No. 2 overhead crane is waiting to pass, it determines that the No. 2 overhead crane can pass through the cross-track section 200. Therefore, the control system sends a start signal to the No. 2 overhead crane, and blocks the cross-track section 200 again and controls the switching mechanism 400 to drive the auxiliary track 300 to switch to the second position. When the No. 2 overhead crane moves onto the downstream second track 202 and triggers the first sensor 204 thereon, it is determined that the No. 2 overhead crane has passed through the cross-track section 200, and the blockade of the cross-track section 200 is released. When it is determined that no other overhead crane 100 is waiting to pass through the cross-track section 200, the control system waits for the signal of the next overhead crane 100 to trigger the first sensor 204.

[0053] Furthermore, after the overhead crane 100 triggers the first sensor 204, the control system needs to determine whether to switch the position of the auxiliary track 300 and the switching mechanism needs to drive the auxiliary track 300 to switch positions, which takes a certain amount of time. To prevent the overhead crane 100 from maintaining its original speed and causing the position of the auxiliary track 300 to not be switched in place, the front auxiliary wheel 115 on the overhead crane 100 is already located inside the entry end of the switched-in-place auxiliary track 300, resulting in interference between the front auxiliary wheel 115 and the rotation of the auxiliary track 300 and the inability of the front auxiliary wheel 115 to move onto the auxiliary track. Therefore, the distance between the second sensor 205 and the crossover gap 203 is such that when the rear traveling wheel 112 of the overhead crane 100 triggers the second sensor 205, the front auxiliary wheel 115 on the overhead crane 100 is located outside the entry end of the switched-in-place auxiliary track 300. For example, the distance between the opposite sides of the front auxiliary wheel and the rear traveling wheel of the overhead crane is not greater than the distance from the second sensor 205 to the entry end of the switched-in-place auxiliary track. When the front traveling wheel 111 of the overhead crane 100 triggers the second sensor 205 at the upstream first or second track, if the control system still has not received a signal indicating that the auxiliary track 300 has been switched in place, then the overhead crane 100 starts to decelerate. Of course, regardless of whether the auxiliary track has been switched in place, as long as the front traveling wheel of the overhead crane triggers the second sensor at the upstream first or second track, the overhead crane decelerates. This can not only effectively ensure that there is enough time for the auxiliary track to switch, but also enable the overhead crane to pass through the auxiliary track at a relatively slow speed, thus ensuring the stability of passage. Also, when the rear traveling wheel 112 on the overhead crane 100 triggers the second sensor 205 at the upstream first or second track, if the control system still has not received a signal indicating that the auxiliary track 300 has been switched in place, then the control system sends a stop command to the overhead crane 100. When the control system determines that the auxiliary track 300 has been switched in place, the control system then sends a command to start moving forward to the overhead crane 100. Furthermore, when the overhead crane moves onto the downstream first or second track and its front or rear moving wheels trigger the second sensor on the downstream first or second track, the overhead crane accelerates to its normal operating speed and continues to move.

[0054] Embodiment 2 This embodiment discloses a handling method based on the overhead crane handling system described above. When the control system determines that it is allowed for an overhead crane 100 to pass through the crossover track section 200, it determines whether the auxiliary track 300 is in the accurate position. If so, the auxiliary track 300 is not adjusted. If not, the auxiliary track 300 is switched to the accurate position through the switching mechanism 400. When the overhead crane 100 moves in the first direction, the accurate position of the auxiliary track 300 is the first position. When the overhead crane 100 moves in the second direction, the accurate position of the auxiliary track 300 is the second position.

[0055] There are still various embodiments of the present invention. All technical solutions formed by using equivalent transformations or equivalent substitutions fall within the protection scope of the present invention.

Claims

1. Overhead crane handling system, including an overhead track and an overhead crane running on the track, the track including a cross-track section, characterized in that: Above the cross-rail section, there is an auxiliary rail, which is connected to a switching mechanism that drives it to rotate horizontally and switch between a first position and a second position. When in the first position, the auxiliary rail extends in a first direction, and when in the second position, the auxiliary rail extends in a second direction; the first direction is the extending direction of the first rail of the cross-rail section, and the second direction is the extending direction of the second rail of the cross-rail section; On the overhead crane, there are a front auxiliary wheel and a rear auxiliary wheel that can move on the auxiliary rail; When the front traveling wheel of the overhead crane moving in the first direction moves past the cross gap of the cross-rail section, the front auxiliary wheel of the overhead crane moves on the auxiliary rail in the first position; when the rear traveling wheel of the overhead crane moves past the cross gap, the rear auxiliary wheel of the overhead crane moves on the auxiliary rail in the first position; When the front traveling wheel of the overhead crane moving in the second direction moves past the cross gap of the cross-rail section, the front auxiliary wheel of the overhead crane moves on the auxiliary rail in the second position; when the rear traveling wheel of the overhead crane moves past the cross gap, the rear auxiliary wheel of the overhead crane moves on the auxiliary rail in the second position.

2. The overhead crane handling system according to claim 1, characterized in that: The length of the auxiliary rail satisfies that before the front traveling wheel moves to the cross gap, the front auxiliary wheel has already moved onto the auxiliary rail, and before the rear traveling wheel moves to the cross gap, the rear auxiliary wheel has already moved onto the auxiliary rail.

3. The overhead crane handling system according to claim 1, wherein: At the top of the overhead crane, there are at least one front guide wheel and at least one rear guide wheel adapted to the auxiliary rail. When the front guide wheel of an overhead crane moves past the cross gap, the front guide wheel rolls and adheres to one side of the auxiliary rail deviating from the front auxiliary wheel; when the rear guide wheel of the overhead crane moves past the cross gap, the rear guide wheel rolls and adheres to one side of the auxiliary rail deviating from the rear auxiliary wheel.

4. The overhead crane handling system according to claim 1, wherein: Above the cross-rail section, there is a mounting plate. At the bottom of the mounting plate, there is a support rail adapted to the positions of the front auxiliary wheel and the rear auxiliary wheel. When the front traveling wheel of an overhead crane moves past the cross gap, the rear auxiliary wheel of the overhead crane adheres to the bottom of the upstream support rail; when the rear traveling wheel of the overhead crane moves past the cross gap, the front auxiliary wheel of the overhead crane adheres to the bottom of the downstream support rail.

5. The overhead crane handling system according to claim 1, characterized in that: A first sensor and a second sensor are provided at each side of the first rail and the second rail. The second sensor is closer to the cross gap than the first sensor. The distance between the second sensor and the cross gap satisfies that when the rear traveling wheel of the overhead crane triggers the second sensor, the front auxiliary wheel on the overhead crane is located outside the entry end of the switched-in auxiliary rail.

6. The overhead crane handling system according to claim 5, characterized in that: When the front traveling wheel of the overhead crane triggers the second sensor at the upstream first rail or second rail, the overhead crane decelerates.

7. The overhead crane handling system according to claim 5, characterized in that: When the control system determines that it is allowed for an overhead crane to pass through a cross-rail section, the cross-rail section is blocked; when it is determined that the rear running wheels of the overhead crane trigger a second sensor at the first rail or the second rail downstream, the control system releases the block of the cross-rail section.

8. The overhead crane handling system according to any one of claims 1-7, characterized in that: A wheel groove and a clamping groove located above the wheel groove are formed on the auxiliary rail. When the auxiliary rail is in the first position, a first support block is embedded in the clamping groove to provide support for the auxiliary rail. When the auxiliary rail is in the second position, a second support block is embedded in the clamping groove to provide support for the auxiliary rail.

9. The overhead crane handling system according to claim 8, wherein: The clamping grooves are distributed on both sides of the auxiliary rail. When the auxiliary rail is in the first position, first support blocks are respectively embedded at the clamping grooves on both sides; when the auxiliary rail is in the second position, second support blocks are respectively embedded at the clamping grooves on both sides.

10. The handling method of the overhead crane handling system according to any one of claims 1-9, characterized in that: When the control system determines that it is allowed for an overhead crane to pass through a cross-rail section, it determines whether the auxiliary rail is in the accurate position. If so, the auxiliary rail is not adjusted. If not, the auxiliary rail is driven to rotate by itself through a switching mechanism to switch to the accurate position.

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