Height limiting device of crane
By combining electric slide rails and limit components, the problem of the lack of height limit on bridge cranes is solved, achieving automatic limit and stable lifting, thus improving the operational safety and stability of bridge cranes.
Patent Information
- Application Number
- CN202520656483.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-04-09
AI Technical Summary
The existing bridge cranes lack height limit devices, which makes them prone to human error and results in poor stability when lifting items, posing safety hazards.
By combining electric slide rails, limit components, and start/stop mechanisms, and through the cooperation of electric hoists, multi-stage telescopic rods, and lifting blocks, automatic limit and stable hoisting are achieved, and the height limit protection of the electric hoist is realized by using contact switches.
It achieves automatic height limit protection without human intervention, improving hoisting stability and safety, preventing cargo from swaying, and reducing the possibility of operational errors.
Smart Images
Figure CN223866230U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, and in particular to a height limiting device for a crane. Background Technology
[0002] A crane is a mechanical device used for handling, lifting, and transferring heavy objects. It is widely used in various locations such as construction sites, ports, logistics centers, and shipyards. A crane typically consists of a robust mechanical system, including a hoisting mechanism, a traveling mechanism, and a slewing mechanism, capable of moving heavy objects vertically or horizontally. Common types include: tower cranes, truck cranes, gantry cranes, crawler cranes, marine cranes, and portal cranes.
[0003] In the prior art, existing bridge cranes generally do not have height limiting devices. The height is usually controlled by personnel observing and manually operating the lifting switch. Human operation is prone to errors. In addition, existing bridge cranes have poor stability when lifting items, and the items are prone to swaying, which poses certain safety hazards. Therefore, this application proposes a height limiting device for cranes to solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing bridge cranes, which generally do not have height limiting devices and rely on manual operation of lifting switches to control the height. This manual operation is prone to errors. Furthermore, existing bridge cranes have poor stability when lifting items, causing items to sway and posing certain safety hazards. Therefore, this utility model proposes a height limiting device for cranes.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A height limiting device for a crane includes a gantry frame, and the height limiting device further includes:
[0007] An electric slide rail is fixedly installed on the top inner wall of the gantry frame. A transverse block is slidably connected to the bottom of the electric slide rail. An electric hoist is fixedly installed at the bottom of the transverse block. A wire rope is installed on the electric hoist, and a hook is fixedly installed at the bottom end of the wire rope.
[0008] The limiting component includes: a connecting block, two multi-stage telescopic rods and two lifting blocks. The connecting block is sleeved on the wire rope. The two multi-stage telescopic rods are fixedly installed on the left and right sides of the connecting block respectively at their close ends. The lifting blocks are fixedly sleeved on the corresponding multi-stage telescopic rods. Sliding holes are provided on the left and right inner walls of the gantry frame, and the lifting blocks are slidably connected in the corresponding sliding holes.
[0009] The start-stop mechanism is located on the left side of the gantry and cooperates with the top of the multi-stage telescopic rod on the left side.
[0010] As a preferred embodiment of this utility model, two limiting plates are fixedly sleeved on the wire rope, and the connecting block is located between the two limiting plates.
[0011] As a preferred embodiment of this utility model, sliders are fixedly installed on both the front and rear sides of the lifting block, and first sliding grooves are provided on both the front and rear inner walls of the sliding hole, with the sliders slidably connected in the corresponding first sliding grooves.
[0012] As a preferred embodiment of this utility model, the start / stop mechanism includes an electric push rod and a contact switch. The electric push rod is fixedly installed on the left side of the gantry frame, and the contact switch is fixedly installed on the output shaft of the electric push rod. The bottom of the contact switch cooperates with the top of the multi-stage telescopic rod on the left side.
[0013] As a preferred embodiment of this utility model, a slide rod is fixedly installed on the output shaft of the electric push rod, a second slide groove is provided on the left side of the gantry, and the right end of the slide rod is slidably connected in the second slide groove.
[0014] As a preferred embodiment of this utility model, a stabilizing rod is fixedly installed on the inner wall of the gantry frame, and a transverse block is slidably sleeved on the stabilizing rod.
[0015] Beneficial effects:
[0016] 1. By starting the electric slide rail, the lateral block, electric hoist, wire rope and hook can be moved laterally. Here, starting the electric hoist can wind or unwind the wire rope, and at the same time drive the hook to lift and move it to facilitate the hoisting and lateral transportation of goods.
[0017] 2. When the wire rope and hook move the goods upward or sideways, the sliding limit cooperation between the two multi-stage telescopic rods and the lifting block and sliding hole can stably limit the wire rope, hook and goods, and ensure the stability of the goods during hoisting and sideways transportation.
[0018] 3. By setting a contact switch, the electric hoist can be de-energized when the multi-stage telescopic rod on the left rises to a limited height. Pressing the contact switch will de-energize the electric hoist, thus providing height limit protection. After the electric hoist is de-energized, the operator manually turns off the electric hoist's lifting switch and then starts the electric push rod to move the contact switch upwards and away from the multi-stage telescopic rod on the left. At this time, the contact switch releases the power-off control of the electric hoist, facilitating subsequent unwinding operations of the electric hoist on the wire rope and hook.
[0019] This invention achieves automatic height limit protection for the crane through a simple structure, eliminating the need for manual control, reducing the risk of errors, and providing stable height limit during the lifting and transport of goods to prevent cargo from swaying and improve safety. Attached Figure Description
[0020] Figure 1 This is a three-dimensional front view of the structure of this utility model;
[0021] Figure 2 This is a structural schematic diagram of the wire rope, hook, connecting block, limiting plate, and multi-stage telescopic rod of this utility model;
[0022] Figure 3 Appendix of this utility model Figure 1 A schematic diagram of the structure of part A;
[0023] Figure 4 Appendix of this utility model Figure 1 A schematic diagram of the structure of part B.
[0024] In the diagram: 1. Gantry frame; 2. Electric slide rail; 3. Transverse block; 4. Electric hoist; 5. Wire rope; 6. Hook; 7. Stabilizer bar; 8. Connecting block; 9. Limiting plate; 10. Multi-stage telescopic rod; 11. Lifting block; 12. Sliding hole; 13. Sliding block; 14. First slide groove; 15. Electric push rod; 16. Contact switch; 17. Sliding rod; 18. Second slide groove. Detailed Implementation
[0025] 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.
[0026] Example
[0027] Reference Figures 1-4 A height limiting device for a crane includes a gantry frame 1, and the height limiting device further includes:
[0028] Electric slide rail 2 is fixedly installed on the top inner wall of gantry frame 1. A transverse block 3 is slidably connected to the bottom of the electric slide rail 2. An electric hoist 4 is fixedly installed at the bottom of the transverse block 3. A wire rope 5 is installed on the electric hoist 4. A hook 6 is fixedly installed at the bottom end of the wire rope 5.
[0029] The limiting component includes: a connecting block 8, two multi-stage telescopic rods 10 and two lifting blocks 11. The connecting block 8 is sleeved on the wire rope 5. The two multi-stage telescopic rods 10 are fixedly installed on the left and right sides of the connecting block 8 respectively at their close ends. The lifting blocks 11 are fixedly sleeved on the corresponding multi-stage telescopic rods 10. Sliding holes 12 are provided on the left and right inner walls of the gantry frame 1. The lifting blocks 11 are slidably connected in the corresponding sliding holes 12.
[0030] The start-stop mechanism is located on the left side of the gantry 1 and cooperates with the top of the multi-stage telescopic rod 10 on the left side.
[0031] With the above structure, the electric slide rail 2 can drive the lateral block 3, electric hoist 4, wire rope 5 and hook 6 to move laterally. Here, the electric hoist 4 can be activated to wind or unwind the wire rope 5, and at the same time drive the hook 6 to lift and lower, so as to facilitate the hoisting and lateral transportation of goods. In addition, when the wire rope 5 and hook 6 move the goods upward or laterally, the sliding limit cooperation between the two multi-stage telescopic rods 10 and the lifting block 11 and the sliding hole 12 can stably limit the wire rope 5, hook 6 and goods, so as to ensure the stability of goods hoisting and lateral transportation.
[0032] As a preferred embodiment of this utility model, two limiting plates 9 are fixedly sleeved on the wire rope 5, and the connecting block 8 is located between the two limiting plates 9. By setting the limiting plates 9, the vertical movement of the connecting block 8 can be limited, ensuring a stable connection between the multi-stage telescopic rod 10 and the wire rope 5.
[0033] As a preferred embodiment of this utility model, sliders 13 are fixedly installed on the front and rear sides of the lifting block 11. First sliding grooves 14 are provided on the front and rear inner walls of the sliding hole 12. The sliders 13 are slidably connected in the corresponding first sliding grooves 14. Through the sliding limit cooperation between the sliders 13 and the first sliding grooves 14, the lifting block 11 can be stably slidably limited and slidably supported.
[0034] As a preferred embodiment of this utility model, the start / stop mechanism includes an electric push rod 15 and a contact switch 16. The electric push rod 15 is fixedly installed on the left side of the gantry frame 1, and the contact switch 16 is fixedly installed on the output shaft of the electric push rod 15. The bottom of the contact switch 16 cooperates with the top of the multi-stage telescopic rod 10 on the left side. By setting the contact switch 16 to contact the multi-stage telescopic rod 10 on the left side when it rises to a limited height, the power to the electric hoist 4 can be cut off by pressing the contact switch 16, thereby achieving height limit protection for the electric hoist 4. When the electric hoist 4 is de-energized, the operator manually closes the lifting switch of the electric hoist 4, and then starts the electric push rod 15 to drive the contact switch 16 to move upward and away from the multi-stage telescopic rod 10 on the left side. At this time, the contact switch 16 releases the power-off control of the electric hoist 4, so as to facilitate the subsequent unwinding operation of the electric hoist 4 on the wire rope 5 and hook 6.
[0035] As a preferred embodiment of this utility model, a slide rod 17 is fixedly installed on the output shaft of the electric push rod 15. A second slide groove 18 is provided on the left side of the gantry frame 1. The right end of the slide rod 17 is slidably connected in the second slide groove 18. Through the sliding limit cooperation between the slide rod 17 and the second slide groove 18, the movement of the electric push rod 15 can be stably supported.
[0036] As a preferred embodiment of this utility model, a stabilizing rod 7 is fixedly installed on the inner wall of the gantry frame 1, and the transverse block 3 is slidably sleeved on the stabilizing rod 7. By setting the stabilizing rod 7, the movement stability of the electric hoist 4 can be improved.
[0037] It should be noted that the specific models of electric slide rail 2, electric hoist 4, electric push rod 15, and contact switch 16 used should be selected by those skilled in the art. Furthermore, the electric slide rail 2, electric hoist 4, electric push rod 15, and contact switch 16 mentioned above are all existing technologies and will not be elaborated upon in this solution.
[0038] The working principle of this utility model is as follows: In use, first connect the electric slide rail 2, electric hoist 4, electric push rod 15, and contact switch 16 to an external power source. Then, by starting the electric slide rail 2, the horizontal moving block 3, electric hoist 4, wire rope 5, and hook 6 can be moved horizontally. Activating the electric hoist 4 allows for winding or unwinding of the wire rope 5, and simultaneously raises and lowers the hook 6, facilitating the lifting and horizontal transport of goods. Furthermore, when the wire rope 5 and hook 6 move the goods upwards or horizontally, the sliding limit mechanism between the two multi-stage telescopic rods 10, the lifting block 11, and the sliding hole 12 ensures proper movement of the wire rope 5, hook 6, and... Stable limiting of the cargo ensures stability during hoisting and lateral transport. Finally, by setting a contact switch 16, it can contact the multi-stage telescopic rod 10 on the left when it rises to the limited height. Pressing the contact switch 16 will cut off the power to the electric hoist 4, thus achieving height limit protection for the electric hoist 4. After the electric hoist 4 is de-energized, the operator manually turns off the electric hoist 4's lifting switch, and then starts the electric push rod 15 to move the contact switch 16 upward and away from the multi-stage telescopic rod 10 on the left. At this time, the contact switch 16 releases the power-off control of the electric hoist 4, so as to facilitate the subsequent unwinding operation of the electric hoist 4 on the wire rope 5 and hook 6.
[0039] 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 height limiting device for a crane, comprising a gantry (1), characterized in that, The height limiting device also includes: Electric slide rail (2), the electric slide rail (2) is fixedly installed on the top inner wall of the gantry frame (1), the bottom of the electric slide rail (2) is slidably connected to a transverse block (3), the bottom of the transverse block (3) is fixedly installed with an electric hoist (4), a steel wire rope (5) is installed on the electric hoist (4), and a hook (6) is fixedly installed at the bottom end of the steel wire rope (5); The limiting component includes: a connecting block (8), two multi-stage telescopic rods (10) and two lifting blocks (11). The connecting block (8) is sleeved on the wire rope (5). The two multi-stage telescopic rods (10) are fixedly installed on the left and right sides of the connecting block (8) respectively. The lifting blocks (11) are fixedly sleeved on the corresponding multi-stage telescopic rods (10). Sliding holes (12) are provided on the left inner wall and the right inner wall of the gantry frame (1). The lifting blocks (11) are slidably connected in the corresponding sliding holes (12). The start-stop mechanism is located on the left side of the gantry (1) and cooperates with the top of the multi-stage telescopic rod (10) on the left side.
2. The height limiting device for a crane according to claim 1, characterized in that, Two limiting plates (9) are fixedly sleeved on the wire rope (5), and the connecting block (8) is located between the two limiting plates (9).
3. The height limiting device for a crane according to claim 1, characterized in that, The lifting block (11) is fixedly installed with sliders (13) on both the front and rear sides. The inner walls of the front and rear sides of the sliding hole (12) are provided with first sliding grooves (14), and the sliders (13) are slidably connected in the corresponding first sliding grooves (14).
4. A height limiting device for a crane according to claim 1, characterized in that, The start / stop mechanism includes an electric push rod (15) and a contact switch (16). The electric push rod (15) is fixedly installed on the left side of the gantry (1), and the contact switch (16) is fixedly installed on the output shaft of the electric push rod (15). The bottom of the contact switch (16) is engaged with the top of the multi-stage telescopic rod (10) on the left side.
5. A height limiting device for a crane according to claim 4, characterized in that, A slide rod (17) is fixedly installed on the output shaft of the electric push rod (15). A second slide groove (18) is provided on the left side of the gantry frame (1). The right end of the slide rod (17) is slidably connected in the second slide groove (18).
6. A height limiting device for a crane according to claim 1, characterized in that, A stabilizing rod (7) is fixedly installed on the inner wall of the gantry frame (1), and the transverse block (3) is slidably sleeved on the stabilizing rod (7).