Lifting equipment for crown block maintenance

Abstract

The invention discloses lifting equipment for crown block maintenance, which is mounted on a hoisting mechanism of a ceiling, and comprises a fixed frame connected to the hoisting mechanism; the movable track assembly can be movably connected to the fixed frame; the first driving mechanism is arranged on the fixed frame, and the first driving mechanism drives the movable track assembly to ascend and descend; the locking assembly is connected to the hoisting mechanism or the fixed frame, and when the movable track assembly ascends to a preset position, the locking assembly locks the movable track assembly at the preset position; and the second driving mechanism is arranged on the fixed frame, the second driving mechanism drives the first electric wire mounting plate to extend to the position below the movable track assembly and retract, and the first electric wire mounting plate is provided with a first litz wire. The lifting equipment does not occupy a ground channel, the space utilization rate and the average area output value of a factory are increased, and the manufacturing cost and the installation cost are lower.

Description

Technical Field

[0001] This invention relates to the field of overhead crane technology, specifically a lifting device for overhead crane maintenance. Background Technology

[0002] In the semiconductor manufacturing industry, overhead crane handling systems are generally used to transfer wafer cassettes that carry wafers between different workstations to achieve intelligent and efficient material handling.

[0003] To ensure the safe and reliable operation of overhead cranes on the overhead rails (the tracks required for normal crane operation), timely repair of malfunctioning cranes or regular maintenance is usually necessary. Therefore, a maintenance device for raising and lowering the overhead cranes is required. Conventional maintenance devices have the following disadvantages:

[0004] 1. It occupies ground passageways, which affects internal logistics and equipment handling when the factory area is limited.

[0005] 2. It has a large shape, with decorative panels on all four sides forming a box shape, and its height reaches the ceiling. Due to its large size, it is often limited in the overall layout.

[0006] 3. Numerous components result in high manufacturing costs. Summary of the Invention

[0007] To overcome the deficiencies in the prior art, embodiments of the present invention provide a lifting device for crane maintenance, which is used to solve at least one of the above-mentioned problems.

[0008] This application discloses a lifting device for overhead crane maintenance, installed on a ceiling hoisting mechanism, comprising:

[0009] A fixed frame is attached to the hoisting mechanism;

[0010] The movable track assembly is movably connected to the fixed frame;

[0011] A first drive mechanism is disposed on the fixed frame, and the first drive mechanism drives the movable track assembly to rise and fall;

[0012] A locking assembly is connected to the hoisting mechanism or the fixed frame. When the movable track assembly rises to a preset position, the locking assembly locks the movable track assembly at that preset position.

[0013] A second drive mechanism is disposed on the fixed frame. The second drive mechanism drives the first wire mounting plate to extend below the movable track assembly and retract. The first wire mounting plate is provided with a first Litz wire.

[0014] Specifically, the movable track assembly includes a top plate, a first side plate, and a second side plate. The first side plate and the second side plate are connected to the two sides of the top plate respectively. Movable tracks are connected to the inner walls of the first side plate and the second side plate respectively. The second drive mechanism drives the first wire mounting plate to extend and retract below the first side plate.

[0015] Specifically, at least one guide rod is provided on the outer wall surface of the first side plate and the second side plate respectively, and a guide sleeve corresponding to the guide rod is provided on the fixed frame.

[0016] Specifically, the first side plate is provided with a first blocking mechanism, which includes a mounting block fixed to the first side plate, a rotating shaft rotatably connected to the mounting block, and a stop rod sleeved on the rotating shaft. A torsion spring is also sleeved on the rotating shaft. The stop rod is provided with a first abutment, and the mounting block is provided with a second abutment. The first abutment and the second abutment are respectively used to abut against one end of the torsion spring. The first side plate is provided with a clearance hole to avoid the stop rod. The first wire mounting plate is provided with a wedge-shaped pressure block. When the first wire mounting plate moves toward the first side plate, the wedge-shaped pressure block can press the bottom of the stop rod to make the stop rod rotate.

[0017] Specifically, the first blocking mechanism further includes a stop member disposed on the mounting block, and the stop bar is provided with a stop hole for the stop member to pass through.

[0018] Specifically, the first drive mechanism includes a motor, a reducer connected to the motor, two pulley assemblies respectively connected to both ends of the reducer, and four belt suspension assemblies. The motor and the reducer are fixed on the fixed frame. Two belt suspension assemblies are respectively provided on the outer wall of the first side plate and the second side plate. The pulley assembly includes two coaxial pulleys. The four pulleys are connected to the four belt suspension assemblies one by one through belts.

[0019] Specifically, the locking assembly includes multiple third drive mechanisms connected to the hoisting mechanism or the fixed frame. Each third drive mechanism has a positioning pin connected to its output shaft. At least one positioning pin sleeve is provided on the outer wall surface of the first side plate and the second side plate, and at least one positioning pin sleeve is provided at each end of the movable track assembly. The positioning pin sleeve is used for the positioning pin to pass through.

[0020] Specifically, the device further includes a transition track assembly for connecting the overhead track and the movable track assembly. The transition track assembly includes two opposing transition tracks connected to the hoisting mechanism. Each transition track is connected to a second wire mounting plate, and the second wire mounting plate is provided with a second Litz wire.

[0021] Specifically, the device further includes a second blocking mechanism, which includes a first slide rail connected to the hoisting mechanism, a slider slidably connected to the first slide rail, a stop block connected to the slider and extending between two transition tracks, and a push rod connected to the slider and extending downward. The movable track assembly is provided with a push block for pushing the push rod.

[0022] Specifically, the device further includes an anti-jamming detection mechanism, which includes a reflective photoelectric switch and a reflector. There is a gap between the transition track and the movable track, and the reflective photoelectric switch and the reflector are located on both sides of the gap.

[0023] The present invention has at least the following beneficial effects: The lifting equipment for crane maintenance in this embodiment is suspended on the ceiling of the factory area, which does not occupy the ground passage, improves the space utilization rate and the average area output value of the factory, and compared with the traditional crane lifting equipment, the equipment of the present invention has a compact overall structure, smaller size, and lower manufacturing and installation costs.

[0024] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the lifting equipment used for crane maintenance in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the connection relationship between the fixed frame, the movable track assembly, and the transition track assembly in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the first driving mechanism connected to the fixed frame in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the movable track assembly connected to the fixed frame in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the active track assembly in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the first blocking mechanism in an embodiment of the present invention;

[0032] Figure 7 This is a cross-sectional view of the first blocking mechanism in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the second driving mechanism and the first wire mounting plate in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the locking assembly locking the movable track assembly in an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the transition track assembly in an embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the installation of the anti-jamming detection mechanism in an embodiment of the present invention.

[0037] The reference numerals in the above figures are as follows: 1. Fixed frame; 2. Movable track assembly; 21. Top plate; 22. First side plate; 221. Clearance hole; 23. Second side plate; 24. Movable track; 241. Movable channel; 25. Guide rod; 26. First blocking mechanism; 261. Mounting block; 262. Rotating shaft; 263. Stop bar; 2631. Stop hole; 264. Torsion spring; 265. First abutment member; 266. Second abutment member; 267. Stop member; 27. Positioning pin sleeve; 28. Push block; 31. Motor; 32. Reducer; 33. Pulley assembly; 34. Belt suspension assembly; 35. Belt; 4. Locking assembly; 41. Third drive mechanism; 42. Positioning pin; 5. Second drive mechanism; 51. Electric push rod; 52. Second slide rail; 53. Sliding bracket; 54. Wedge-shaped pressure block; 61. First wire mounting plate; 62. First Litz wire; 7. Transition rail assembly; 71. Transition rail; 72. Second wire mounting plate; 731. First slide rail; 732. Slider; 733. Stop; 734. Push rod; 81. Reflective photoelectric switch; 82. Reflector; 91. Electrical box; 92. Button station; 10. Lifting mechanism. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "fixing," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0042] Furthermore, the terms "first" and "second" are used only to distinguish between different terms in description and do not have any special meaning.

[0043] like Figure 1 As shown, the lifting device for crane maintenance of the present invention is installed on the hoisting mechanism 10 on the ceiling of the factory area. The hoisting mechanism 10 includes a steel frame connected to the ceiling and a hoisting assembly for hoisting the rail (hereinafter referred to as the overhead rail) used when the crane is working normally onto the steel frame.

[0044] Combination Figures 1 to 4 As shown, the lifting equipment for crane maintenance in this embodiment mainly includes: a fixed frame 1, a movable track assembly 2, a first drive mechanism, a locking assembly 4, a second drive mechanism 5, and a movable Litz line assembly. The fixed frame 1 is connected to the hoisting mechanism 10 and is used to hoist and support the entire lifting equipment. The first drive mechanism is set on the fixed frame 1 and can drive the movable track assembly 2 to rise and fall vertically. The locking assembly 4 is connected to the hoisting mechanism 10 or the fixed frame 1. When the movable track assembly 2 rises to a preset position, the locking assembly 4 locks the movable track assembly 2 to lock it at the preset position so as to prevent the movable track assembly 2 from shaking and affecting the operation of the overhead crane. The preset position refers to the position when the movable track assembly 2 rises to the position where it is connected to the overhead rail. The movable Litz wire assembly includes a first wire mounting plate 61 and a first Litz wire 62 fixed thereon. The second drive mechanism 5 is set on the fixed frame 1 and can drive the first wire mounting plate 61 to move horizontally, so that the first wire mounting plate 61 extends below the movable track assembly 2 and retracts (that is, so that the first wire mounting plate 61 is not located below the movable track assembly 2).

[0045] In this embodiment, the locking assembly 4 is connected to the hoisting mechanism 10. In some other embodiments, the locking assembly 4 may be connected to the fixed frame 1.

[0046] With the above structure, the lifting equipment for crane maintenance in this embodiment is suspended on the ceiling of the factory area, without occupying ground passages, improving space utilization and the average area output of the factory. Compared with traditional crane lifting equipment, the equipment of the present invention has a compact overall structure, smaller size, and lower manufacturing and installation costs.

[0047] like Figure 2 and Figure 3 As shown, the fixed frame 1 in this embodiment is mainly composed of multiple square steel bars that are fixedly connected, which makes the structure sturdy and helps to reduce weight.

[0048] like Figure 4 and Figure 5As shown, the movable track assembly 2 in this embodiment mainly includes: a top plate 21, a first side plate 22, and a second side plate 23. The first side plate 22 and the second side plate 23 are connected opposite each other to the two sides of the top plate 21. A movable track 24 is fixedly connected to the inner wall surface of each of the first side plate 22 and the second side plate 23. The two movable tracks 24 are arranged opposite each other to support the overhead crane and allow the crane to travel on them. The inner wall surface of the first side plate 22 and the second side plate 23 refers to the wall surface facing each other, and the outer wall surface refers to the wall surface facing away from each other. The second drive mechanism 5 drives the first wire mounting plate 61 to extend and retract below the first side plate 22. Preferably, the range of motion of the first wire mounting plate 61 does not include the area directly below the second side plate 23.

[0049] Using the above scheme, when no crane has entered the movable track assembly 2, the second drive mechanism 5 drives the first wire mounting plate 61 to extend the first lizard wire 62 to the bottom of the first side plate 22 and between the two movable tracks 24 to supply power to the crane that is about to enter; after the crane travels to the preset position on the two movable tracks 24, the second drive mechanism 5 drives the first wire mounting plate 61 to move the first lizard wire 62 to the bottom of the first side plate 22 and the first wire mounting plate 61 leaves the channel (hereinafter referred to as the movable channel 241) formed by the two movable tracks 24, so as to prevent the first wire mounting plate 61 from interfering with the movable track assembly 2 driving the crane to move downward.

[0050] like Figure 5 As shown, in this embodiment, the movable track assembly 2 has at least one guide rod 25 on the outer wall surface of its first side plate 22 and second side plate 23, and the fixed frame 1 has a guide sleeve (not shown) corresponding to the guide rod 25. When the movable track assembly 2 rises, the alignment accuracy between the movable track assembly 2 and the ceiling track can be ensured by the guide rod 25 passing through the guide sleeve. In other embodiments, multiple guide rods 25 can be provided on the first side plate 22 and second side plate 23.

[0051] Combination Figures 5 to 7As shown, the first side plate 22 of this embodiment is provided with a first blocking mechanism 26. The first blocking mechanism 26 mainly includes a mounting block 261, a rotating shaft 262, a stop rod, and a torsion spring 264. The mounting block 261 is fixed to the first side plate 22, the rotating shaft 262 is rotatably mounted on the mounting block 261, the stop rod and the torsion spring 264 are respectively sleeved on the outer wall of the rotating shaft 262, and the stop rod is fixedly connected to the rotating shaft 262. When the rotating shaft 262 rotates, it can drive the stop rod to move synchronously. The stop rod is provided with a first abutment 265, and the mounting block 261 is provided with a second abutment 266. The first abutment 265 and the second abutment 266 are staggered to abut against the two ends of the torsion spring 264 respectively, so as to compress the torsion spring 264. The first abutment 265 and the second abutment 266 can be pins or screws. The first side plate 22 is provided with a clearance hole 221, which allows at least a portion of the stop bar to extend into the aforementioned movable channel 241 when rotating. The first wire mounting plate 61 is provided with a wedge-shaped pressure block 54. When the first wire mounting plate 61 is driven to move toward the first side plate 22 to a preset position, the wedge-shaped pressure block 54 can press the bottom of the stop bar, thereby causing the stop bar to rotate, and then causing the top of the stop bar to rotate into the movable channel 241 through the clearance hole 221.

[0052] Better, such as Figure 6 As shown, the bottom of the stop lever has a rounded corner, which can improve the smoothness of the wedge-shaped pressure block 54 pressing the bottom of the stop lever.

[0053] like Figure 5 As shown, the top plate 21, the first side plate 22, and the second side plate 23 are provided with reasonable weight-reduction holes. Some observation windows can also be provided on the first side plate 22 and / or the second side plate 23 to allow personnel to observe the crane's position within the movement channel 241. Multiple sets of sensors (not shown) are provided on the first side plate 22 or the second side plate 23 to detect whether the crane is in the correct position. Only when the sensors detect that the crane is in the correct position can the second drive mechanism 5 drive the first wire mounting plate 61 to move out of the movement range of the moving track assembly 2 and de-energize the crane.

[0054] Using the above scheme, when no crane has entered the movable track 24, since the first wire mounting plate 61 extends below the first side plate 22 and between the two movable tracks 24, the wedge-shaped pressure block 54 presses the bottom of the stop bar, causing the stop bar to rotate to a vertical position. At this time, the torsion spring 264 is compressed, and the stop bar 263 does not extend into the movable channel 241 through the clearance hole 221 on the first side plate 22. The crane can then enter the movable channel 241 along the movable track 24. After the crane reaches the preset position, the second drive mechanism 5 drives the first wire mounting plate 61 to leave the movable channel 241, and the wedge-shaped pressure block 54 no longer presses the stop bar 263. Driven by the reset of the torsion spring 264, the top of the stop bar 263 rotates into the movable channel 241 to limit the crane's wheels and prevent the crane from moving on the movable track 24 during the lifting process.

[0055] like Figure 7 As shown, the first blocking mechanism 26 in this embodiment also includes a stop 267 disposed on the mounting block 261, and the stop bar is provided with a corresponding stop hole 2631 for the stop 267 to pass through. Using the above scheme, when the movable track assembly 2 drives the overhead crane down to the ground, personnel can press the stop bar to rotate its top and exit the movable channel 241, and then insert the stop 267 into the stop hole 2631 to prevent the stop bar from resetting, allowing the overhead crane to exit the movable channel 241. After the overhead crane exits the movable channel 241, personnel pull the stop 267 out of the stop hole 2631, and the stop bar resets and rotates back into the movable channel 241. Specifically, the stop 267 can be a rotating plunger, which can both achieve the function of passing through the stop hole 2631 and be fixedly connected to the mounting block 261 to prevent loss; the stop hole 2631 can be a blind hole or a through hole.

[0056] Specifically, such as Figure 8 As shown, the second drive mechanism 5 in this embodiment mainly includes: an electric push rod 51, a second slide rail 52, and a sliding bracket 53. The electric push rod 51 and the second slide rail 52 are connected to the fixed frame 1. One end of the sliding bracket 53 is slidably connected to the second slide rail 52 through the output shaft of the electric push rod 51, and the other end is fixedly connected to the first wire mounting plate 61.

[0057] like Figure 2 and Figure 3As shown, the first drive mechanism in this embodiment includes a motor 31, a reducer 32 connected to the motor 31, two pulley assemblies 33, and four belt suspension assemblies 34. The two pulley assemblies 33 are respectively connected to both ends of the reducer 32, and each pulley assembly 33 is connected to two belt suspension assemblies 34. Specifically, the motor 31 and the reducer 32 are fixed on the fixed frame 1, and two belt suspension assemblies 34 are respectively provided on the outer wall surfaces of the first side plate 22 and the second side plate 23; each pulley assembly 33 includes two coaxial belt pulleys 35, and the two belt pulleys 35 are respectively connected to the belt suspension assemblies 34 at the same end of the first side plate 22 and the second side plate 23 via belts 35.

[0058] The locking assembly 4 of the present invention includes multiple third drive mechanisms 41 connected to the hoisting mechanism 10 or the fixed frame 1. Each third drive mechanism 41 has a positioning pin 42 connected to its output shaft. At least one positioning pin sleeve 27 for the positioning pin 42 to pass through is provided on the outer wall surface of the first side plate 22 and the second side plate 23 of the movable track assembly 2, and at least one positioning pin sleeve 27 is provided at each end of the movable track assembly 2. That is, when the first side plate 22 and the second side plate 23 each have only one positioning pin sleeve 27, these two positioning pin sleeves 27 are located at different ends. Figure 5 and Figure 9 As shown, in this embodiment, four third drive mechanisms 41 are mounted on the hoisting mechanism 10. Each end of the first side plate 22 is provided with a positioning pin sleeve 27, and each end of the second side plate 23 is also provided with a positioning pin sleeve 27. This ensures the stability of the connection between the movable track 24 and the overhead rail, improving the smoothness of the crane's movement. The third drive mechanism 41 can be an electric push rod.

[0059] like Figure 1 and Figure 2 As shown, the lifting device in this embodiment also includes a transition track assembly 7, which connects the overhead track and the movable track assembly 2. Specifically, as... Figure 10 As shown, the transition track assembly 7 includes two opposing transition tracks 71 connected to the hoisting mechanism 10. Each transition track 71 is connected to a second wire mounting plate 72. The two second wire mounting plates 72 are oppositely arranged, and each second wire mounting plate 72 is provided with a second Litz wire (not shown in the figure). Furthermore, the positions of the transition tracks 71, the second wire mounting plates 72, and the second Litz wires are fixed, unlike the movable track assembly 2 which can be raised or lowered. Using this design, the transition track assembly 7 can buffer the crane's movement from the overhead rail into the movable track assembly 2.

[0060] like Figure 9 and Figure 10As shown, the lifting device in this embodiment also includes a second blocking mechanism. The second blocking mechanism includes a first slide rail 731 connected to the hoisting mechanism 10, a slider 732 slidably connected to the first slide rail 731, a stop block 733 connected to the slider 732 and extending between the two transition tracks 71, and a push rod 734 connected to the slider 732 and extending downwards. When the movable track assembly 2 descends, the slider 732 slides downwards under gravity and remains at a low position, so that the stop block 733 extending between the two transition tracks 71 can limit the crane on the transition track 71, preventing the crane from detaching from the transition track 71 and falling. The power source for the push rod 734 to drive the stop block 733 upwards comes from the movable track assembly 2. Specifically, as... Figure 9 As shown, a push block 28 is connected to the movable track assembly 2 (specifically the first side plate 22 and / or the second side plate 23). The position of the push block 28 corresponds to the position of the push rod 734. When the movable track assembly 2 rises to the point where the push block 28 contacts the bottom of the push rod 734, the push rod 734 continues to move upward as the position of the push block 28 rises, until the push rod 734 moves with the stop block 733 to a height that no longer interferes with the travel of the overhead crane.

[0061] like Figure 11 As shown, the lifting device in this embodiment also includes an anti-jamming detection mechanism, which includes a reflective photoelectric switch 81 and a reflector 82. When the transition track 71 and the movable track 24 are aligned, there is a certain gap. The reflective photoelectric switch 81 and the reflector 82 are respectively located at the detection points of this gap. When the crane is not in the gap, the reflective photoelectric switch 81 can receive the light reflected by the reflector 82; when the crane is in the gap, it blocks the light reflected by the reflector 82, causing the reflective photoelectric switch 81 to be unable to receive light. Based on this principle, the lifting device's electrical control system can determine whether the crane is in the gap between the transition track 71 and the movable track 24. If so, the movable track assembly 2 cannot descend, thus avoiding the risk of the crane getting stuck or falling. In this embodiment, the reflective photoelectric switch 81 is located on the transition track 71 side of the gap, and the reflector 82 is located on the movable track 24 side of the gap. In some other embodiments, the positions of the reflective photoelectric switch 81 and the reflector 82 can also be interchanged.

[0062] like Figure 1 and Figure 2 As shown, the lifting device in this embodiment may also include: an electrical box 91 connected to the hoisting mechanism 10 and a button station 92 set on the ground, both of which are used for the collection and operation of components in the air.

[0063] In summary, the working process of the lifting equipment for crane maintenance in this embodiment is as follows:

[0064] First, the first drive mechanism drives the movable track assembly 2 to rise until the movable track 24 is aligned with the transition track 71. During this process, the stop bar of the first blocking mechanism 26 is in a free state and located within the movable channel 241 formed by the two movable tracks 24. The push bar 734 and the stop block 733 of the second blocking mechanism are pushed from the low position to the high position by the push block 28 on the movable track assembly 2.

[0065] Next, the third drive mechanism 41 drives the positioning pin 42 to pass into the positioning pin sleeve 27 on the first side plate 22 and the second side plate 23 to lock the movable track assembly 2 and prevent it from shaking; the second drive mechanism 5 drives the first wire mounting plate 61 to move the first Litz wire 62 to the bottom of the first side plate 22. During this process, the wedge-shaped pressure block 54 on the first wire mounting plate 61 presses the bottom of the stop bar of the first blocking mechanism 26 to make it rotate out of the movable channel 241.

[0066] Next, the overhead crane travels from the transition track 71 onto the movable track 24. When the sensor detects that the overhead crane has reached the correct position and the anti-jamming detection mechanism detects that there is no overhead crane in the gap between the two sets of tracks, the second drive mechanism 5 drives the first wire mounting plate 61 to retract the first Litz wire 62 to below the first side plate 22. The stop bar resets and screws into the movable channel 241 to limit the overhead crane. The third drive mechanism 41 drives the positioning pin 42 to reset, and the first drive mechanism drives the movable track assembly 2 to lower the overhead crane.

[0067] Finally, after the crane maintenance is completed, the movable track assembly 2 will drive the crane back to the overhead track.

[0068] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A lifting device for overhead crane maintenance, installed on a ceiling hoisting mechanism, characterized in that, include: A fixed frame is attached to the hoisting mechanism; The movable track assembly is movably connected to the fixed frame; A first drive mechanism is disposed on the fixed frame, and the first drive mechanism drives the movable track assembly to rise and fall; A locking assembly is connected to the hoisting mechanism or the fixed frame. When the movable track assembly rises to a preset position, the locking assembly locks the movable track assembly at that preset position. A second drive mechanism is disposed on the fixed frame. The second drive mechanism drives the first wire mounting plate to extend below the movable track assembly and retract. The first wire mounting plate is provided with a first Litz wire.

2. The lifting device for crane maintenance according to claim 1, characterized in that, The movable track assembly includes a top plate, a first side plate, and a second side plate. The first side plate and the second side plate are connected to opposite sides of the top plate. Movable tracks are respectively connected to the inner wall surfaces of the first side plate and the second side plate. The second drive mechanism drives the first wire mounting plate to extend and retract below the first side plate.

3. The lifting device for crane maintenance according to claim 2, characterized in that, At least one guide rod is provided on the outer wall surface of the first side plate and the second side plate respectively, and a guide sleeve corresponding to the guide rod is provided on the fixed frame.

4. The lifting device for crane maintenance according to claim 2, characterized in that, The first side plate is provided with a first blocking mechanism, which includes a mounting block fixed to the first side plate, a rotating shaft rotatably connected to the mounting block, and a stop rod sleeved on the rotating shaft. A torsion spring is also sleeved on the rotating shaft. The stop rod is provided with a first abutment, and the mounting block is provided with a second abutment. The first abutment and the second abutment are respectively used to abut against one end of the torsion spring. The first side plate is provided with a clearance hole to avoid the stop rod. The first wire mounting plate is provided with a wedge-shaped pressure block. When the first wire mounting plate moves toward the first side plate, the wedge-shaped pressure block can press the bottom of the stop rod to make the stop rod rotate.

5. The lifting device for crane maintenance according to claim 4, characterized in that, The first blocking mechanism further includes a stop member disposed on the mounting block, and the stop bar is provided with a stop hole for the stop member to pass through.

6. The lifting device for crane maintenance according to claim 2, characterized in that, The first drive mechanism includes a motor, a reducer connected to the motor, two pulley assemblies respectively connected to both ends of the reducer, and four belt suspension assemblies. The motor and the reducer are fixed on the fixed frame. Two belt suspension assemblies are respectively provided on the outer wall of the first side plate and the second side plate. The pulley assembly includes two coaxial pulleys. The four pulleys are connected to the four belt suspension assemblies one by one through belts.

7. The lifting device for crane maintenance according to claim 2, characterized in that, The locking assembly includes multiple third drive mechanisms connected to the hoisting mechanism or the fixed frame. Each third drive mechanism has a positioning pin connected to its output shaft. At least one positioning pin sleeve is provided on the outer wall of the first side plate and the second side plate respectively. At least one positioning pin sleeve is provided at each end of the movable track assembly. The positioning pin sleeve is used for the positioning pin to pass through.

8. The lifting device for crane maintenance according to claim 1, characterized in that, The device also includes a transition track assembly for connecting the overhead track and the movable track assembly. The transition track assembly includes two opposing transition tracks connected to the hoisting mechanism. Each transition track is connected to a second wire mounting plate, and the second wire mounting plate is provided with a second Litz wire.

9. The lifting device for crane maintenance according to claim 8, characterized in that, The device further includes a second blocking mechanism, which includes a first slide rail connected to the hoisting mechanism, a slider slidably connected to the first slide rail, a stop block connected to the slider and extending between two transition tracks, and a push rod connected to the slider and extending downward. The movable track assembly is provided with a push block for pushing the push rod.

10. The lifting device for crane maintenance according to claim 8, characterized in that, The device also includes an anti-jamming detection mechanism, which includes a reflective photoelectric switch and a reflector. There is a gap between the transition track and the movable track, and the reflective photoelectric switch and the reflector are located on both sides of the gap.

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