A gantry crane

Abstract

The utility model provides a portal frame type crane belongs to crane technical field, including track body and the drive trolley that can move on track body, the track body includes fixed guide rail and movable guide rail, the number of fixed guide rail is two, movable guide rail is located between two fixed guide rails, two fixed guide rail bottom all are fixed with vertical pole, be provided with lifting mechanism on movable guide rail, overhaul, lifting mechanism drives movable guide rail and drive trolley downshift. The utility model sets up lifting mechanism, overhauls, will drive trolley move to movable guide rail, utilizes lifting mechanism to drive movable guide rail and drive trolley downshift to ground, then will drive trolley move down from movable guide rail, after moving down, repair drive trolley, after repairing, drive trolley is installed back to movable guide rail, again with the help of lifting mechanism, movable guide rail is lifted to fixed guide rail department, can.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a gantry crane. Background Technology

[0002] A gantry crane is a type of lifting equipment consisting mainly of two columns, a top horizontal guide rail, a matching drive trolley, and an electric hoist. The drive trolley moves on the guide rail to change the position of the electric hoist, which is used to lift the workpiece or equipment to be transported.

[0003] When a common gantry crane is in use, if the drive trolley is damaged, a lifting platform is needed to send maintenance personnel to a high place to disassemble the drive trolley. After disassembly, it is lowered to the ground for repair. After repair, the drive trolley needs to be reassembled using the lifting platform. The convenience of drive trolley maintenance needs to be improved. Therefore, this application provides a gantry crane to meet the requirements. Utility Model Content

[0004] This utility model provides a gantry crane to solve the problem that the maintenance convenience of the drive trolley needs to be improved.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A gantry crane includes a track body and a drive trolley that can move on the track body. The track body includes fixed guide rails and movable guide rails. There are two fixed guide rails and the movable guide rail is located between the two fixed guide rails. The bottom of each of the two fixed guide rails is fixed with a vertical rod. A lifting mechanism is provided on the movable guide rail. During maintenance, the lifting mechanism drives the movable guide rail and the drive trolley to move downwards.

[0006] Preferably, the lifting mechanism includes a winch, an upper fixed rod is fixedly fixed on two fixed guide rails, a movable guide rail is detachably connected to the bottom of the upper fixed rod, a bracket is fixed on the upper fixed rod, the winch is mounted on the bracket, the end of the winch's wire rope passes through the upper fixed rod and is fixedly connected to the top of the movable guide rail, and a lower fixed plate is fixed to the bottom of the movable guide rail, the lower fixed plate is detachably connected to the bottom of the fixed guide rail.

[0007] Preferably, a reinforcing rib is fixed to the top of the fixed guide rail, and the reinforcing rib is fixed to the top of the upper fixed rod.

[0008] Preferably, the bottom of the movable guide rail is fixed with a second reinforcing rib, which is fixed to the bottom of the lower fixed plate.

[0009] Preferably, the bottom of the second reinforcing rib is a downwardly curved surface.

[0010] Preferably, a limit component is provided at the lower fixed plate. During maintenance, the limit component is used to limit the movement of the trolley on the movable guide rail.

[0011] Preferably, the limiting assembly includes limiting rods, square grooves are provided on opposite sides of the lower fixing plate, the limiting rods are slidably connected in the square grooves, springs are fixed at opposite ends of the two limiting rods, the end of the spring away from the limiting rod is fixed to the side of the inner wall of the square groove, an insert is fixed at the bottom of the fixed guide rail, a through groove is provided on the lower fixing plate, an inclined groove is provided on the limiting rod, the insert passes through the through groove and is inserted into the inclined groove, and the insert fits against the inclined surface of the inner wall of the inclined groove.

[0012] Preferably, a fixing seat is fixedly sleeved on the top of the insert block, the fixing seat is fixed to the bottom of the fixing guide rail, and a positioning groove is opened on the top of the lower fixing plate corresponding to the position of the fixing seat, with the fixing seat located in the positioning groove.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects: In the above solution, by setting up a lifting mechanism, during maintenance, the drive trolley is moved to the movable guide rail, and the lifting mechanism is used to move the movable guide rail and the drive trolley down to the ground. Then the drive trolley is removed from the movable guide rail, and after being removed, the drive trolley is repaired. After the repair is completed, the drive trolley is put back on the movable guide rail, and then the lifting mechanism is used to raise the movable guide rail to the fixed guide rail.

[0014] By setting up a winch, an upper fixed rod, and a lower fixed plate, the winch is used to raise and lower the movable guide rail. The upper fixed rod and the lower fixed plate are used to connect and fix the movable guide rail to the fixed guide rail. During maintenance, the upper fixed rod and the movable guide rail, as well as the lower fixed plate and the fixed guide rail, are connected together. After maintenance is completed, the movable guide rail is fixed to the fixed guide rail using the upper fixed rod and the lower fixed plate. The operation is simple, making the disassembly and assembly of the movable guide rail more convenient.

[0015] By setting a limit rod and a plug, after the lower fixed plate is disconnected from the fixed guide rail and the movable guide rail moves down, the plug separates from the inner wall of the inclined groove on the limit rod. After separation, the limit rod extends from the side of the lower fixed plate under the action of spring force. After extending, it can limit the drive trolley and prevent the drive trolley from falling off the movable guide rail. When the drive trolley needs to be put on the movable guide rail after maintenance, press the limit rod to retract the limit rod into the lower fixed plate. After the drive trolley is put on the movable guide rail, the limit rod extends from the side of the lower fixed plate again to continue to limit the movement of the movable guide rail and the drive trolley when moving upward. By limiting the drive trolley, the safety of the drive trolley during the lifting and lowering process is improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a three-dimensional structural diagram of the winch section of this utility model; Figure 3 This is a three-dimensional structural diagram of the lower fixing plate of this utility model; Figure 4 This is a sectional view of the limiting rod of this utility model; Figure 5 This is a three-dimensional structural diagram of the insertion block of this utility model.

[0017] In the diagram: 1. Fixed guide rail; 2. Movable guide rail; 3. Lifting mechanism; 4. Winch; 5. Upper fixed rod; 6. Lower fixed plate; 7. Reinforcing rib 1; 8. Reinforcing rib 2; 9. Limiting rod; 10. Inclined groove; 11. Insert block; 12. Fixed seat; 13. Positioning groove; 14. Drive trolley; 15. Spring. Detailed Implementation

[0018] The gantry crane provided by this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should also be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0019] like Figures 1-5 As shown, an embodiment of this utility model provides a gantry crane, including a track body and a drive trolley 14 that can move on the track body. The track body includes fixed guide rails 1 and movable guide rails 2. There are two fixed guide rails 1, and the movable guide rail 2 is located between the two fixed guide rails 1. Vertical rods are fixed to the bottom of both fixed guide rails 1. A lifting mechanism 3 is provided on the movable guide rail 2. During maintenance, the lifting mechanism 3 drives the movable guide rail 2 and the drive trolley 14 to move down. The movable guide rail 2, as a liftable section, supports the drive trolley 14 that needs to be maintained. The vertical rods support the fixed guide rails 1, ensuring the stability of the track body installation. The lifting mechanism 3 realizes the synchronous downward movement of the movable guide rail 2 and the drive trolley 14, allowing maintenance of the drive trolley 14 without high-altitude operations, reducing maintenance difficulty and safety risks, and improving maintenance convenience.

[0020] like Figure 2 and Figure 3As shown in this embodiment, the lifting mechanism 3 includes a winch 4, with an upper fixed rod 5 fixed on both fixed guide rails 1. The movable guide rail 2 is detachably connected to the bottom of the upper fixed rod 5, and a bracket is fixed on the upper fixed rod 5. The winch 4 is mounted on the bracket, and the end of the wire rope of the winch 4 passes through the upper fixed rod 5 and is fixedly connected to the top of the movable guide rail 2. A lower fixed plate 6 is fixed to the bottom of the movable guide rail 2, and the lower fixed plate 6 is detachably connected to the bottom of the fixed guide rail 1. The winch 4 provides lifting power and drives the movable guide rail 2 to move up and down by winding and unwinding the wire rope. The upper fixed rod 5 and the lower fixed plate 6 cooperate to achieve detachable fixation between the movable guide rail 2 and the fixed guide rail 1. During normal use, this ensures the continuity of the rail body and facilitates disassembly during maintenance. The bracket fixes the position of the winch 4 to ensure stable and reliable lifting.

[0021] like Figure 2 and Figure 3 As shown in this embodiment, a reinforcing rib 7 is fixed to the top of the fixed guide rail 1. The reinforcing rib 7 is fixed to the top of the upper fixed rod 5. The reinforcing rib 7 enhances the connection strength between the fixed guide rail 1 and the upper fixed rod 5, disperses the force at the connection between the two, ensures the overall structure of the track body is stable, and extends the service life.

[0022] like Figure 3 As shown in this embodiment, the bottom of the movable guide rail 2 is fixed with a reinforcing rib 2, which is fixed to the bottom of the lower fixed plate 6. The reinforcing rib 2 increases the connection rigidity between the movable guide rail 2 and the lower fixed plate 6, preventing the connection between the two from breaking or deforming due to stress concentration when the movable guide rail 2 is under load, and ensuring the stable connection between the movable guide rail 2 and the lower fixed plate 6.

[0023] like Figure 3 As shown in this embodiment, the bottom of the second reinforcing rib 8 is a downward curved surface. The curved surface design can improve the structural strength of the second reinforcing rib 8, thereby improving the deformation resistance of the second reinforcing rib 8. When the second reinforcing rib 8 is under stress, it can further improve the connection between the lower fixed plate 6 and the movable guide rail 2.

[0024] like Figure 4 and Figure 5 As shown in this embodiment, a limit component is provided at the lower fixed plate 6. During maintenance, the limit component is used to limit the drive trolley 14 on the movable guide rail 2. When the movable guide rail 2 is moved down for maintenance, the limit component blocks and limits the drive trolley 14 to prevent it from falling off the end of the movable guide rail 2 due to inertia or accident, thus ensuring the safety of equipment and personnel during the maintenance process.

[0025] like Figure 4As shown, in this embodiment, the limiting component includes a limiting rod 9. Square grooves are provided on opposite sides of the lower fixed plate 6. The limiting rod 9 is slidably connected within the square grooves. Springs 15 are fixed to opposite ends of the two limiting rods 9. The end of the spring 15 away from the limiting rod 9 is fixed to the side of the inner wall of the square groove. A plug 11 is fixed to the bottom of the fixed guide rail 1. A through groove is provided on the lower fixed plate 6, and an inclined groove 10 is provided on the limiting rod 9. The plug 11 passes through the through groove and is inserted into the inclined groove 10, with the plug 11 fitting against the inclined surface of the inner wall of the inclined groove 10. The square groove provides installation space for the limiting rod 9 and the spring 15. When the movable guide rail 2 is connected to the fixed guide rail 1, the plug 11 presses against the inclined surface of the inclined groove 10, causing the limiting rod 9 to retract into the square groove, without affecting the movement of the drive trolley 14. During maintenance, the plug 11 disengages from the inclined groove 10, and the spring 15 pushes the limiting rod 9 outwards, thus limiting the drive trolley 14.

[0026] like Figure 5 As shown in this embodiment, a fixing seat 12 is fixedly sleeved on the top of the insert block 11. The fixing seat 12 is fixed to the bottom of the fixed guide rail 1. A positioning groove 13 is opened on the top of the lower fixing plate 6 corresponding to the position of the fixing seat 12. The fixing seat 12 is located in the positioning groove 13. The fixing seat 12 enhances the connection strength between the insert block 11 and the fixed guide rail 1, preventing the insert block 11 from falling off under force. The positioning groove 13 cooperates with the fixing seat 12 to accurately position the installation position of the movable guide rail 2, ensuring that the movable guide rail 2 is aligned with the fixed guide rail 1, avoiding deviation at the connection between the two, and ensuring that the drive trolley 14 passes smoothly.

[0027] Working principle: During normal use, the drive trolley 14 moves on the track body. The track body consists of two fixed guide rails 1 and a movable guide rail 2 in between. The screw on the movable guide rail 2 passes through the upper fixed rod 5. Tightening the nut on the screw can connect and fix the top of the movable guide rail 2 to the upper fixed rod 5. The lower fixed plate 6 is fixed to the bottom of the fixed guide rail 1. The screw at the bottom of the fixed guide rail 1 passes through the lower fixed plate 6 and is threaded with a nut. The nut is pressed against the bottom of the lower fixed plate 6 to connect and fix the movable guide rail 2 to the fixed guide rail 1. The first reinforcing rib 7 enhances the connection strength between the upper fixed rod 5 and the fixed guide rail 1. The second reinforcing rib 8 enhances the connection strength between the lower fixed plate 6 and the movable guide rail 2 to prevent deformation under force. During maintenance, unscrew the nuts at the upper fixing rod 5 and the lower fixing plate 6, then start the winch 4 to unwind the wire rope. The movable guide rail 2 moves down. At this time, the insert block 11 at the bottom of the fixed guide rail 1 no longer presses against the inner wall of the inclined groove 10 on the limit rod 9. Under the elastic force of the spring 15, the limit rod 9 extends from the side of the lower fixing plate 6 to limit the drive trolley 14 on the movable guide rail 2, preventing the drive trolley 14 from falling off the movable guide rail 2. After the movable guide rail 2 moves down to the ground, press the limit rod 9 to retract it into the lower fixing plate 6. Then the drive trolley 14 can be removed from the movable guide rail 2 for maintenance. When the drive trolley 14 needs to be reinstalled on the movable guide rail 2 after maintenance, press the limit rod 9 to retract it, and put the drive trolley 14 onto the movable guide rail 2. The winch 4 is activated to wind up the wire rope, thereby driving the movable guide rail 2 to move upward. When it moves to the fixed guide rail 1, the insert block 11 is inserted into the inclined groove 10 and presses the inclined surface of the inner wall of the inclined groove 10, causing the limit rod 9 to retract into the lower fixed plate 6 and press the spring 15. The spring 15 is in a compressed state. When the end of the movable guide rail 2 is in contact with the end of the fixed guide rail 1, the screw at the top of the movable guide rail 2 passes through the upper fixed rod 5. Tightening the nut on the screw will fix the movable guide rail 2 to the upper fixed rod 5. At the same time, the screw at the bottom of the fixed guide rail 1 passes through the lower fixed plate 6. Tightening the nut on the screw at this point will fix the lower fixed plate 6, thereby fixing the movable guide rail 2. Then the track body can continue to guide the movement of the drive trolley 14.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A gantry crane, comprising a track body and a drive trolley (14) movable on the track body, characterized in that, The track body includes a fixed guide rail (1) and a movable guide rail (2). There are two fixed guide rails (1). The movable guide rail (2) is located between the two fixed guide rails (1). The bottom of the two fixed guide rails (1) is fixed with a vertical rod. The movable guide rail (2) is equipped with a lifting mechanism (3). During maintenance, the lifting mechanism (3) drives the movable guide rail (2) and the drive trolley (14) to move down.

2. The gantry crane according to claim 1, characterized in that, The lifting mechanism (3) includes a winch (4), an upper fixed rod (5) is fixed on two fixed guide rails (1), a movable guide rail (2) is detachably connected to the bottom of the upper fixed rod (5), a bracket is fixed on the upper fixed rod (5), the winch (4) is mounted on the bracket, the end of the wire rope of the winch (4) passes through the upper fixed rod (5) and is fixedly connected to the top of the movable guide rail (2), and a lower fixed plate (6) is fixed to the bottom of the movable guide rail (2), and the lower fixed plate (6) is detachably connected to the bottom of the fixed guide rail (1).

3. The gantry crane according to claim 2, characterized in that, The top of the fixed guide rail (1) is fixed with a reinforcing rib (7), which is fixed to the top of the upper fixed rod (5).

4. The gantry crane according to claim 2, characterized in that, The bottom of the movable guide rail (2) is fixed with a reinforcing rib (8), which is fixed to the bottom of the lower fixed plate (6).

5. The gantry crane according to claim 4, characterized in that, The bottom of the second reinforcing rib (8) is a downward-curved surface.

6. The gantry crane according to claim 2, characterized in that, A limit component is provided at the lower fixed plate (6). During maintenance, the limit component is used to limit the movement of the trolley (14) on the movable guide rail (2).

7. The gantry crane according to claim 6, characterized in that, The limiting component includes a limiting rod (9), and square grooves are provided on opposite sides of the lower fixing plate (6). The limiting rod (9) is slidably connected in the square groove. Springs (15) are fixed at opposite ends of the two limiting rods (9). The end of the spring (15) away from the limiting rod (9) is fixed to the side of the inner wall of the square groove. A plug (11) is fixed at the bottom of the fixed guide rail (1). A through groove is provided on the lower fixing plate (6), and an inclined groove (10) is provided on the limiting rod (9). The plug (11) passes through the through groove and is inserted into the inclined groove (10), and the plug (11) is in contact with the inclined surface of the inner wall of the inclined groove (10).

8. The gantry crane according to claim 7, characterized in that, The top of the insert (11) is fixedly fitted with a fixing seat (12), which is fixed to the bottom of the fixing guide rail (1). The top of the lower fixing plate (6) is provided with a positioning groove (13) corresponding to the position of the fixing seat (12), and the fixing seat (12) is located in the positioning groove (13).

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