Anti-falling mechanism of gantry crane
By installing electric slide rails, moving blocks, electric lifting hoists, metal ropes, supports, limit boxes, and detection components on the gantry crane, and utilizing speed sensors and controllers to achieve real-time monitoring and emergency braking of the metal rope, the problem of cargo falling and equipment damage during gantry crane lifting is solved, thus improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG WANLI LIFTING MASCH CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-10
AI Technical Summary
Existing gantry cranes cannot monitor the load when lifting goods. If the load exceeds the safe range, the goods may fall and the equipment may be damaged, resulting in poor safety.
It employs electric slide rails, moving blocks, electric lifting hoists, metal ropes, brackets, limit boxes, detection components, and limit components. Through speed sensors and controllers, it achieves real-time monitoring and emergency braking of the metal rope to prevent goods from falling.
It enables real-time monitoring and emergency braking of the lifting speed of the metal rope, preventing goods from falling and equipment damage, and improving the safety of the gantry crane.
Smart Images
Figure CN224477857U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, and in particular to an anti-falling mechanism for a gantry crane. Background Technology
[0002] A gantry crane (also called a portal crane) is a large lifting device widely used in factories, docks, warehouses, and construction sites. It is typically used for lifting and moving materials in large spaces, and is especially suitable for lifting heavy or large objects.
[0003] In the prior art, Chinese patent application number 202321367913.8 discloses a gantry crane, comprising: a gantry frame; a base connected to the bottom end of the gantry frame; a pulley assembly disposed on the base to facilitate movement of the base relative to the ground; and a support assembly movably disposed on the base in the vertical direction. When the support assembly is in a supporting position, it contacts the ground to support the base; when the support assembly is in a disengaged position, it disengages from the ground. This utility model of a gantry crane, through the support assembly supporting the base during lifting, prevents the gantry frame from tipping over or becoming unstable, thus improving the stability of the gantry crane. When moving, the support assembly is retracted, and the pulley assembly facilitates the movement of the gantry crane, saving manpower and improving the efficiency of transporting lifted objects.
[0004] However, the above technical solutions have the problem that the crane cannot monitor the load when lifting goods. When the load exceeds the safe range, there may be a risk of the goods falling. It is difficult to limit the lifting of goods and may also cause equipment damage, resulting in poor safety. Therefore, this application proposes an anti-fall mechanism for gantry cranes to solve the above problems. Utility Model Content
[0005] The purpose of this utility model is to solve the shortcomings of existing technologies, such as the inability to monitor the load when cranes are lifting goods, the risk of goods falling when the load exceeds the safe range, the difficulty in limiting and braking the lifting of goods, and the potential damage to the equipment, resulting in poor safety. Therefore, this utility model proposes an anti-fall mechanism for gantry cranes.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A fall prevention mechanism for a gantry crane includes a gantry body, and the fall prevention mechanism further includes:
[0008] An electric slide rail is fixedly installed on the top inner wall of the gantry frame.
[0009] A movable block, which is slidably mounted on the bottom of an electric slide rail;
[0010] An electric lifting hoist, wherein the electric lifting hoist is fixedly installed at the bottom of the moving block;
[0011] A metal rope, the top end of which is mounted on an electric lifting hoist, and a hook is fixedly mounted on the bottom end of the metal rope;
[0012] The support is provided in two parts, with the top ends of the two supports respectively fixedly installed on the front and rear sides of the movable block;
[0013] A limiting box, which is sleeved on a metal rope, with the bottom ends of two brackets fixedly installed on the front and rear sides of the limiting box, respectively.
[0014] The detection assembly includes two support wheels, an induction coil, a mounting rod, and a speed sensor. The two support wheels are rotatably connected to the rear inner wall of the limit box. The induction coil is installed on the front side of the right support wheel. The right end of the mounting rod is fixedly installed on the right inner wall of the limit box. The speed sensor is fixedly installed on the left side of the mounting rod and cooperates with the induction coil.
[0015] A limiting component is disposed on the bottom inner wall of the limiting box, and the limiting component cooperates with the metal rope.
[0016] As a preferred embodiment of this utility model, a controller is fixedly installed on the left side of the gantry frame.
[0017] As a preferred embodiment of this utility model, a stabilizing rod is fixedly installed on the inner wall of the gantry frame, and a moving block is slidably sleeved on the stabilizing rod.
[0018] As a preferred embodiment of this utility model, the upper and lower inner walls of the limiting box are provided with through holes, and the bottom end of the metal rope passes through the two through holes and cooperates with the inner wall of the through holes.
[0019] As a preferred embodiment of this utility model, the limiting assembly includes two electric push rods, two slide rods, two clamping plates, and two brake pads. The two electric push rods are respectively fixedly installed on the left and right inner walls of the limiting box. The bottom ends of the two slide rods are slidably connected to the bottom inner wall of the limiting box. The sides of the two slide rods that are far apart from each other are respectively fixedly installed on the output shafts of the two electric push rods. The sides of the two clamping plates that are far apart from each other are respectively fixedly installed on the sides of the two slide rods that are close to each other. The sides of the two brake pads that are far apart from each other are respectively fixedly installed on the sides of the two clamping plates that are close to each other. The sides of the two brake pads that are close to each other are both engaged with metal ropes.
[0020] As a preferred embodiment of this utility model, two sliding grooves are provided on the bottom inner wall of the limiting box, and the bottom end of the sliding rod is slidably connected in the corresponding sliding groove.
[0021] Beneficial effects:
[0022] 1. By setting two support wheels, the metal rope can rotate when it moves up and down. If the electric hoist is damaged due to excessive weight of the goods, the metal rope will descend rapidly, which will cause the support wheels to rotate too fast. This will increase the rotation speed of the induction coil. At this time, the speed sensor detects the induction coil and sends a signal to control the limit component to brake the metal rope.
[0023] 2. The speed sensor sends a signal to the controller, which then controls the two electric push rods to start. The two electric push rods can drive the two slide rods, two clamping plates and two brake pads to move closer to each other and clamp and fix the metal rope, thereby limiting the descent of the metal rope, ensuring that the goods will not fall and be damaged, and improving the safety of the gantry frame.
[0024] This utility model achieves real-time monitoring of the lifting speed of the metal rope when using the gantry crane through a simple structure, thereby enabling emergency braking of the metal rope in case of deceleration, preventing goods from falling and being damaged, and has strong safety and practicality. Attached Figure Description
[0025] Figure 1 This is a three-dimensional front view of the structure of this utility model;
[0026] Figure 2 This is a three-dimensional structural diagram of the movable block, electric lifting hoist, metal rope, hook, bracket and limit box of this utility model.
[0027] Figure 3 This is a three-dimensional sectional view of the limiting box of this utility model;
[0028] Figure 4 This is a three-dimensional structural diagram of the support wheel, induction coil, mounting rod, and speed sensor of this utility model.
[0029] In the diagram: 1. Gantry frame; 2. Controller; 3. Electric slide rail; 4. Moving block; 5. Stabilizer bar; 6. Electric lifting hoist; 7. Metal rope; 8. Hook; 9. Bracket; 10. Limit box; 11. Through hole; 12. Support wheel; 13. Induction coil; 14. Mounting rod; 15. Speed sensor; 16. Electric push rod; 17. Slide rod; 18. Slide groove; 19. Clamping plate; 20. Brake pad. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0031] Example
[0032] Reference Figures 1-4 A fall prevention mechanism for a gantry crane includes a gantry body 1, and the fall prevention mechanism further includes:
[0033] Electric slide rail 3 is fixedly installed on the top inner wall of the gantry frame 1;
[0034] Movable block 4 is slidably mounted on the bottom of electric slide rail 3;
[0035] Electric lifting hoist 6 is fixedly installed at the bottom of the moving block 4;
[0036] Metal rope 7, the top end of metal rope 7 is installed on electric lifting hoist 6, and hook 8 is fixedly installed at the bottom end of metal rope 7;
[0037] The bracket 9 is provided in two parts, and the tops of the two brackets 9 are respectively fixedly installed on the front and rear sides of the movable block 4;
[0038] Limit box 10, the limit box 10 is sleeved on the metal rope 7, and the bottom ends of the two brackets 9 are respectively fixedly installed on the front and rear sides of the limit box 10.
[0039] The detection assembly includes two support wheels 12, an induction coil 13, a mounting rod 14, and a speed sensor 15. Both support wheels 12 are rotatably connected to the rear inner wall of the limit box 10. The induction coil 13 is installed on the front side of the right support wheel 12. The right end of the mounting rod 14 is fixedly installed on the right inner wall of the limit box 10. The speed sensor 15 is fixedly installed on the left side of the mounting rod 14 and cooperates with the induction coil 13.
[0040] The limiting component is located on the bottom inner wall of the limiting box 10 and cooperates with the metal rope 7.
[0041] With the above structure, by setting two support wheels 12, when the metal rope 7 moves up and down, the two support wheels 12 will rotate. If the electric hoist 6 is damaged due to excessive weight of the goods, the metal rope 7 will descend rapidly, which will cause the support wheels 12 to rotate too fast, thereby increasing the rotation speed of the induction coil 13. At this time, the rotation speed sensor 15 detects and coordinates with the induction coil 13, and the rotation speed sensor 15 can send a signal to control the limit component to brake the metal rope 7.
[0042] As a preferred embodiment of this utility model, a controller 2 is fixedly installed on the left side of the gantry frame 1. By setting the controller 2, the electric slide rail 3, the electric lifting hoist 6, the induction coil 13, the speed sensor 15 and the electric push rod 16 can be controlled.
[0043] As a preferred embodiment of this utility model, a stabilizing rod 5 is fixedly installed on the inner wall of the gantry frame 1, and the moving block 4 is slidably sleeved on the stabilizing rod 5. By setting the stabilizing rod 5, the moving block 4 can be stably slidably supported.
[0044] As a preferred embodiment of this utility model, through holes 11 are provided on the top inner wall and the bottom inner wall of the limiting box 10. The bottom end of the metal rope 7 passes through the two through holes 11 respectively and cooperates with the inner wall of the through holes 11. By providing through holes 11, it is convenient to install the limiting box 10 and the metal rope 7.
[0045] As a preferred embodiment of this utility model, the limiting assembly includes two electric push rods 16, two slide rods 17, two clamping plates 19, and two brake pads 20. The two electric push rods 16 are respectively fixedly installed on the left and right inner walls of the limiting box 10. The bottom ends of the two slide rods 17 are slidably connected to the bottom inner wall of the limiting box 10. The sides of the two slide rods 17 that are far apart are respectively fixedly installed on the output shafts of the two electric push rods 16. The sides of the two clamping plates 19 that are far apart are respectively fixedly installed on the sides of the two slide rods 17 that are close to each other. The two brake pads... The two brake pads 20 are fixedly installed on the sides of the two clamping plates 19 that are close to each other. The sides of the two brake pads 20 that are close to each other are engaged with the metal rope 7. The speed sensor 15 sends a signal to the controller 2. At this time, the controller 2 controls the two electric push rods 16 to start. The two electric push rods 16 can drive the two slide rods 17, the two clamping plates 19 and the two brake pads 20 to move closer to each other and clamp and fix the metal rope 7, thereby limiting the descent of the metal rope 7, ensuring that the goods will not fall and be damaged, and improving the safety of the gantry frame.
[0046] As a preferred embodiment of this utility model, two sliding grooves 18 are provided on the bottom inner wall of the limiting box 10, and the bottom end of the sliding rod 17 is slidably connected in the corresponding sliding groove 18. By providing the sliding grooves 18, the sliding rod 17 can be stably limited and supported.
[0047] It should be noted that the specific models of controller 2, electric slide rail 3, electric lifting hoist 6, induction coil 13, speed sensor 15, and electric push rod 16 used should be selected by those skilled in the art. Furthermore, the controller 2, electric slide rail 3, electric lifting hoist 6, induction coil 13, speed sensor 15, and electric push rod 16 mentioned above are all existing technologies and will not be elaborated upon in this solution.
[0048] The working principle of this utility model is as follows: In use, firstly, the controller 2, electric slide rail 3, electric lifting hoist 6, induction coil 13, speed sensor 15, and electric push rod 16 are connected to an external power source. Then, by setting two support wheels 12, when the metal rope 7 moves up and down, the two support wheels 12 are driven to rotate. If the electric lifting hoist 6 is damaged due to excessive weight of the goods, the metal rope 7 will descend rapidly, causing the support wheels 12 to rotate too fast, thereby increasing the speed of the induction coil 13. At this time, the speed sensor 15 detects the induction coil 13 and sends a signal to the controller 2. The controller 2 then controls the two electric push rods 16 to start. The two electric push rods 16 can drive the two slide rods 17, two clamping plates 19, and two brake pads 20 to move closer together and clamp and fix the metal rope 7, thereby limiting the descent of the metal rope 7, ensuring that the goods will not fall and be damaged, and improving the safety of the gantry frame.
[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A fall prevention mechanism for a gantry crane, comprising a gantry body (1), characterized in that, The anti-fall mechanism also includes: Electric slide rail (3), which is fixedly installed on the top inner wall of the gantry frame (1); A movable block (4) is slidably mounted on the bottom of an electric slide rail (3); An electric lifting hoist (6) is fixedly installed at the bottom of the moving block (4); Metal rope (7), the top end of which is mounted on electric lifting hoist (6), and the bottom end of which is fixedly mounted with hook (8). The bracket (9) is configured as two, and the top ends of the two brackets (9) are respectively fixedly installed on the front and rear sides of the movable block (4); Limiting box (10), the limiting box (10) is sleeved on the metal rope (7), and the bottom ends of the two brackets (9) are respectively fixedly installed on the front and rear sides of the limiting box (10); The detection assembly includes: two support wheels (12), an induction coil (13), a mounting rod (14), and a speed sensor (15). The two support wheels (12) are rotatably connected to the rear inner wall of the limit box (10). The induction coil (13) is installed on the front side of the right support wheel (12). The right end of the mounting rod (14) is fixedly installed on the right inner wall of the limit box (10). The speed sensor (15) is fixedly installed on the left side of the mounting rod (14). The speed sensor (15) cooperates with the induction coil (13). The limiting component is disposed on the bottom inner wall of the limiting box (10) and cooperates with the metal rope (7).
2. The anti-falling mechanism for a gantry crane according to claim 1, characterized in that, A controller (2) is fixedly installed on the left side of the gantry frame (1).
3. The anti-falling mechanism for a gantry crane according to claim 1, characterized in that, A stabilizing rod (5) is fixedly installed on the inner wall of the gantry frame (1), and a moving block (4) is slidably sleeved on the stabilizing rod (5).
4. The anti-falling mechanism for a gantry crane according to claim 1, characterized in that, The limit box (10) has through holes (11) on its top inner wall and bottom inner wall. The bottom end of the metal rope (7) passes through the two through holes (11) and matches the inner wall of the through holes (11).
5. The anti-falling mechanism for a gantry crane according to claim 1, characterized in that, The limiting assembly includes two electric push rods (16), two slide rods (17), two clamping plates (19), and two brake pads (20). The two electric push rods (16) are fixedly installed on the left inner wall and the right inner wall of the limiting box (10), respectively. The bottom ends of the two slide rods (17) are slidably connected to the bottom inner wall of the limiting box (10). The sides of the two slide rods (17) that are far apart from each other are fixedly installed on the output shafts of the two electric push rods (16), the sides of the two clamping plates (19) that are far apart from each other are fixedly installed on the sides of the two slide rods (17) that are close to each other, and the sides of the two brake pads (20) that are far apart from each other are fixedly installed on the sides of the two clamping plates (19) that are close to each other. The sides of the two brake pads (20) that are close to each other are both engaged with the metal rope (7).
6. The anti-falling mechanism for a gantry crane according to claim 5, characterized in that, The bottom inner wall of the limiting box (10) has two sliding grooves (18), and the bottom end of the sliding rod (17) is slidably connected in the corresponding sliding groove (18).