Crane stall lock
By designing a speed sensor and a self-locking device for the automatic drive structure in the crane, real-time monitoring and self-locking of the electric hoist are achieved, solving the problem of self-locking control delay in the existing technology and improving the safety and stability of the crane.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI LINGDING INTELLIGENT EQUIPMENT CO LTD
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-14
AI Technical Summary
Existing stall self-locking devices in cranes have a delay in self-locking control, which leads to safety hazards and makes it impossible to monitor and lock the electric hoist in a timely manner.
A self-locking device comprising a speed sensor, a drive structure, a fixing structure, and a mounting shaft was designed. By monitoring the rotational speed of the electric hoist in real time, when the speed exceeds the set limit, the device automatically controls the brake disc to press against the disc, thereby achieving self-locking.
This system integrates monitoring and self-locking of crane electric hoists, ensuring timely self-locking, reducing wear, and improving the stability and safety of self-locking.
Smart Images
Figure CN224493533U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, and more specifically, to a crane stall self-locking device. Background Technology
[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. The electric hoist in a crane is an important component for lifting objects. During the operation of an electric hoist, in order to prevent the wire rope from stalling and causing safety accidents, a stall self-locking device is usually required. The stall self-locking device is usually driven by a drive structure to press the brake disc against the disc body, and relies on friction to fix the disc body on the shaft of the electric hoist, thereby achieving the effect of self-locking the electric hoist.
[0003] Existing stall self-locking devices typically only provide a simple locking effect. When the electric hoist in the crane stalls, personnel usually control the device to lock the electric hoist via an external controller. Although this method has a self-locking effect, the self-locking is controlled by personnel, which introduces a delay. It is easy for the control to be untimely, resulting in failure to lock in time, thus creating safety hazards and making it unsuitable for use. In view of this, we propose a crane stall self-locking device. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a crane stall self-locking device to solve the technical problem that the current stall self-locking device is not convenient for monitoring and self-locking integration.
[0005] To solve the above technical problems, this utility model provides the following technical solution: a crane stall self-locking device, including a mounting base, a mounting plate arranged in the center of one side of the bottom of the mounting base, a speed sensor arranged on the mounting plate, a mounting box arranged on the top of the mounting base, a mounting shaft rotatably arranged inside the mounting box, a speed measuring disk arranged on the mounting shaft facing the speed sensor, a fixing structure arranged on the mounting shaft, the fixing structure including a disc and a brake disc, and a driving structure arranged inside the mounting box;
[0006] The two sides of the disc are frustum sections, and the brake disc facing the side of the disc is a frustum opening, and the frustum section and the frustum opening are matched in size.
[0007] Preferably, one end of the mounting shaft is a first connecting part, which is connected to the speed measuring disc, and the other end of the mounting shaft is a second connecting part. One end of the second connecting part is provided with a hexagonal socket, and fixing bolts are symmetrically arranged on the surface of the second connecting part.
[0008] Preferably, the drive structure includes an electro-hydraulic push rod, a concave bracket, and a concave plate frame. The electro-hydraulic push rod is arranged on the mounting base, the concave bracket is arranged on the piston end of the electro-hydraulic push rod, mounting rods are symmetrically arranged inside the mounting box, the concave plate frame is slidably arranged on the mounting rods, the disc is arranged on the mounting shaft, the brake disc is arranged on the concave plate frame, and the mounting shaft passes through the brake disc and the concave plate frame.
[0009] Preferably, the bottom ends of the concave bracket are triangular portions, and the two ends of the concave plate frame are guide slopes, with the guide slopes corresponding to the slopes of the concave plate frame.
[0010] Preferably, the inclined surface of the concave plate frame is provided with a T-shaped groove, and a T-shaped slider is slidably arranged inside the T-shaped groove, the T-shaped slider being connected to the guide inclined surface.
[0011] Preferably, the concave bracket has welding blocks arranged at the front and rear, and several sets of balls are rolled on the welding blocks. The mounting box has arc-shaped grooves on the front and rear sides, and the balls are located in the arc-shaped grooves.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. This utility model, through its designed speed sensor, drive structure, fixing structure, speed measuring disc, and mounting shaft, allows for integrated monitoring and self-locking of the electric hoist. When in use, the device is mounted on the electric hoist via a mounting base, with the mounting shaft connected and fixed to the hoist's rotating shaft. As the electric hoist operates, it synchronously drives the mounting shaft to rotate. The speed sensor monitors the speed of the speed measuring disc at the other end of the mounting shaft in real time. When the speed sensor detects that the speed of the speed measuring disc exceeds a set limit, it indicates that the electric hoist has stalled. The speed sensor then transmits an electrical signal to an external controller, which automatically controls the drive structure to press the brake disc in the fixing structure against the disc, stopping the disc and mounting shaft from rotating. The mounting shaft then stops the rotation of the electric hoist's rotating shaft, thus achieving self-locking of the electric hoist. Therefore, this structure achieves integrated monitoring and self-locking of the electric hoist in a crane, providing better stall self-locking control and solving the technical problem that current stall self-locking devices are not convenient for integrated monitoring and self-locking. Therefore, this utility model possesses the advantage of integrated monitoring and self-locking for cranes.
[0014] 2. In the fixing structure of this utility model, the two sides of the disc are frustum sections, and the inner side of the brake disc is a frustum opening. The frustum opening matches the size of the frustum section. Therefore, when the brake disc presses against the disc, the disc is fixed by pressing against the frustum section through the frustum opening. This frustum-shaped pressing fixing method has both axial and radial constant pressure. Compared with the vertical pressing pressure generated by the traditional planar pressing fixing method, after tightening, the axial component of the friction force can offset the loosening tendency. There is no need to continuously apply external force. Even if part of the axial force is removed, the friction force can still maintain positive pressure, achieving "self-holding locking". Moreover, the contact area is larger and the pressure distribution is more uniform (gradually changing along the axial direction of the conical surface), which can reduce local pressure and reduce wear. It can maintain a stable coefficient of friction during long-term use, maintain the self-locking effect, and further ensure the stability of the device's detection of the self-locking effect. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic cross-sectional view of the mounting box of this utility model;
[0017] Figure 3 This is a schematic diagram of the mounting shaft and fixing structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the brake disc structure of this utility model;
[0019] Figure 5 This is a schematic diagram of the mounting box structure of this utility model;
[0020] Figure 6 This is a schematic diagram of the concave support structure of this utility model;
[0021] Figure 7 This is a schematic diagram of one usage state of the present invention.
[0022] Explanation of the labels in the diagram:
[0023] 1. Mounting base; 101. Mounting plate; 2. Speed sensor; 3. Mounting box; 301. Arc groove; 4. Mounting shaft; 401. First connecting part; 402. Second connecting part; 403. Hexagonal socket; 404. Fixing bolt; 5. Speed measuring disc; 6. Fixing structure; 601. Disc; 602. Brake disc; 603. Frustum; 604. Frustum opening; 7. Drive structure; 701. Electro-hydraulic push rod; 702. Concave bracket; 703. Concave plate frame; 704. Guide slope; 705. Triangular part; 706. T-shaped slide; 707. T-shaped slider; 708. Welding block; 709. Ball bearing; 7010. Mounting rod. Detailed Implementation
[0024] like Figures 1 to 7 As shown, this utility model relates to a crane stall self-locking device, including a mounting base 1, a mounting plate 101 arranged in the center of one side of the bottom of the mounting base 1, a speed sensor 2 arranged on the mounting plate 101, a mounting box 3 arranged on the top of the mounting base 1, a mounting shaft 4 rotatably arranged inside the mounting box 3, a speed measuring disk 5 arranged at the end of the mounting shaft 4 facing the speed sensor 2, a fixing structure 6 arranged on the mounting shaft 4, the fixing structure 6 including a disc 601 and a brake disc 602, a driving structure 7 arranged inside the mounting box 3; one end of the mounting shaft 4 is a first connecting part 401, the first connecting part 401 is connected to the speed measuring disk 5, and the other end of the mounting shaft 4 is a second connecting part 402, one end of the second connecting part 402 is provided with a hexagonal socket 403, and fixing bolts 404 are symmetrically arranged on the surface of the second connecting part 402;
[0025] When in use, the device is mounted on the electric hoist of the crane via the mounting base 1. The hexagonal socket 403 of the second connecting part 402 on the mounting shaft 4 engages with the hexagonal end of the electric hoist's rotating shaft, and the fixing bolt 404 is screwed onto the hexagonal end of the electric hoist's rotating shaft for fixation. Then, when the electric hoist of the crane operates, it synchronously drives the mounting shaft 4 to rotate. The first connecting part 401 on the mounting shaft 4 drives the speed measuring disc 5 to rotate synchronously. Then, the speed sensor 2 monitors the rotation speed of the speed measuring disc 5 in real time. When the speed sensor 2 detects that the rotation speed of the speed measuring disc 5 exceeds the set limit, this... When the speed sensor 2 detects a stall in the electric hoist of the crane, it indicates that the electric hoist has stalled. The speed sensor 2 then transmits an electrical signal to the external controller, which automatically controls the drive structure 7 to drive the brake disc 602 in the fixed structure 6 to press against the disc 601, causing the disc 601 and the mounting shaft 4 to stop rotating. The mounting shaft 4 then drives the rotating shaft on the electric hoist to stop rotating, thus achieving self-locking of the electric hoist. Therefore, the above structure can achieve the integrated monitoring and self-locking effect of the electric hoist in the crane, and achieve better stall self-locking control.
[0026] In an embodiment of this utility model, the two sides of the disc 601 are frustum portions 603, and the brake disc 602 facing the side of the disc 601 is a frustum opening 604, and the frustum portions 603 and the frustum opening 604 are matched in size.
[0027] When the brake disc 602 presses against the disc 601, the disc 601 is fixed by pressing against the frustum portion 603 through the frustum opening 604. This frustum-shaped pressing and fixing method has both axial and radial constant pressure. Compared with the vertical pressing pressure generated by the traditional planar pressing and fixing method, after tightening, the axial component of the friction force can offset the loosening tendency. There is no need to continuously apply external force. Even if part of the axial force is removed, the friction force can still maintain positive pressure, achieving "self-holding locking". Moreover, the contact area is larger and the pressure distribution is more uniform (gradually changing along the axial direction of the conical surface), which can reduce local pressure and reduce wear. It can maintain a stable coefficient of friction during long-term use, maintain the self-locking effect, and further ensure the stability of the device's detection of the self-locking effect.
[0028] In an embodiment of this utility model, the drive structure 7 includes an electro-hydraulic push rod 701, a concave bracket 702, and a concave plate frame 703. The electro-hydraulic push rod 701 is arranged on the mounting base 1, the concave bracket 702 is arranged on the piston end of the electro-hydraulic push rod 701, mounting rods 7010 are symmetrically arranged inside the mounting box 3, the concave plate frame 703 is slidably arranged on the mounting rods 7010, the disc 601 is arranged on the mounting shaft 4, and the brake disc 602 is arranged on the concave plate frame 703. On the plate frame 703, the mounting shaft 4 passes through the brake disc 602 and the concave plate frame 703; the bottom two ends of the concave support 702 are triangular parts 705, and the two ends of the concave plate frame 703 are guide slopes 704, and the guide slopes 704 correspond to the slopes of the concave plate frame 703; the slope of the concave plate frame 703 is provided with a T-shaped slide groove 706, and a T-shaped slider 707 is slidably arranged inside the T-shaped slide groove 706, and the T-shaped slider 707 is connected to the guide slope 704;
[0029] When the drive structure 7 is working, the electro-hydraulic push rod 701 will drive the concave bracket 702 to rise and fall. Then, with the cooperation of the guide inclined surface 704 and the triangular part 705, as the concave bracket 702 rises and falls, the T-shaped sliding groove 706 and the T-shaped slider 707 on both sides of the inclined surface of the triangular part 705 cooperate to realize the relative or opposite movement of the two sets of concave brackets 702. This ensures that the two sets of concave brackets 702 drive the corresponding brake discs 602 to move synchronously. This allows the frustum openings 604 of the two sets of brake discs 602 to press and fix the frustum parts 603 on both sides of the disc 601 synchronously, ensuring the effect of pressing and fixing the disc 601 by the two sets of brake discs 602.
[0030] Specifically, the concave bracket 702 has welding blocks 708 arranged at the front and rear, and several sets of balls 709 are rolled on the welding blocks 708. The mounting box 3 has arc-shaped grooves 301 on the front and rear sides, and the balls 709 are located in the arc-shaped grooves 301. The welding blocks 708, balls 709 and arc-shaped grooves 301 work together to limit the lifting of the concave bracket 702, ensuring that the concave bracket 702 can be lifted vertically stably and avoid deformation.
[0031] Working Principle: This embodiment provides a crane stall self-locking device. First, when the device is in use, it is installed on the electric hoist of the crane via the mounting base 1. The hexagonal socket 403 of the second connecting part 402 on the mounting shaft 4 is inserted and connected to the hexagonal end of the electric hoist shaft, and the fixing bolt 404 is screwed onto the hexagonal end of the electric hoist shaft for fixation. Then, when the electric hoist of the crane is working, it will synchronously drive the mounting shaft 4 to rotate. The first connecting part 401 on the mounting shaft 4 drives the speed measuring disk 5 to rotate synchronously. Then, the speed sensor 2 monitors the rotation speed of the speed measuring disk 5 in real time. When the speed sensor 2 detects the speed... When the rotational speed of disc 5 exceeds the set limit, it indicates that the electric hoist of the crane has stalled. Then, the speed sensor 2 transmits an electrical signal to the external controller. The external controller can then automatically control the drive structure 7 to drive the brake disc 602 in the fixed structure 6 to press against the disc 601, causing the disc 601 and the mounting shaft 4 to stop rotating. Then, the mounting shaft 4 drives the rotating shaft on the electric hoist to stop rotating, thus achieving self-locking of the electric hoist. Therefore, the above structure can achieve the integrated monitoring and self-locking effect of the electric hoist in the crane, and achieve better stall self-locking control.
[0032] Secondly, when the brake disc 602 presses against the disc 601, the disc 601 is fixed by pressing against the frustum portion 603 through the frustum opening 604. This frustum-shaped pressing and fixing method has both axial and radial constant pressure. Compared with the vertical pressing pressure generated by the traditional planar pressing and fixing method, after tightening, the axial component of the friction force can offset the loosening tendency. There is no need to continuously apply external force. Even if part of the axial force is removed, the friction force can still maintain positive pressure, achieving "self-holding locking". Moreover, the contact area is larger and the pressure distribution is more uniform (gradually changing along the axial direction of the conical surface), which can reduce local pressure and reduce wear. It can maintain a stable coefficient of friction during long-term use, maintain the self-locking effect, and further ensure the stability of the device's detection of the self-locking effect.
[0033] Finally, when the drive structure 7 is working, the electric hydraulic push rod 701 will drive the concave bracket 702 to rise and fall. Then, with the cooperation of the guide inclined surface 704 and the triangular part 705, as the concave bracket 702 rises and falls, the T-shaped sliding groove 706 and the T-shaped slider 707 on both sides of the inclined surface of the triangular part 705 cooperate to realize the relative or opposite movement of the two sets of concave brackets 702. This ensures that the two sets of concave brackets 702 drive the corresponding brake discs 602 to move synchronously. This allows the frustum openings 604 of the two sets of brake discs 602 to press and fix the frustum parts 603 on both sides of the disc 601 synchronously, ensuring the effect of pressing and fixing the disc 601 by the two sets of brake discs 602.
[0034] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.
Claims
1. A crane stall self-locking device, characterized in that, The device includes a mounting base (1), a mounting plate (101) is arranged at the center of one side of the bottom of the mounting base (1), a speed sensor (2) is arranged on the mounting plate (101), a mounting box (3) is arranged on the top of the mounting base (1), a mounting shaft (4) is rotatably arranged inside the mounting box (3), a speed measuring disk (5) is arranged on the mounting shaft (4) facing the speed sensor (2), a fixing structure (6) is arranged on the mounting shaft (4), the fixing structure (6) includes a disc (601) and a brake disc (602), and a driving structure (7) is arranged inside the mounting box (3). The disc (601) has frustum portions (603) on both sides, and the brake disc (602) has a frustum opening (604) facing the disc (601), and the frustum portions (603) and frustum openings (604) are sized to match.
2. The crane stall self-locking device according to claim 1, characterized in that, One end of the mounting shaft (4) is a first connecting part (401), which is connected to the speed measuring disk (5). The other end of the mounting shaft (4) is a second connecting part (402). One end of the second connecting part (402) is provided with a hexagonal socket (403), and fixing bolts (404) are symmetrically arranged on the surface of the second connecting part (402).
3. A crane stall self-locking device according to claim 1, characterized in that, The drive structure (7) includes an electro-hydraulic push rod (701), a concave bracket (702), and a concave plate frame (703). The electro-hydraulic push rod (701) is arranged on the mounting base (1), and the concave bracket (702) is arranged on the piston end of the electro-hydraulic push rod (701). The mounting box (3) has mounting rods (7010) symmetrically arranged inside. The concave plate frame (703) is slidably arranged on the mounting rods (7010). The disc (601) is arranged on the mounting shaft (4), and the brake disc (602) is arranged on the concave plate frame (703). The mounting shaft (4) passes through the brake disc (602) and the concave plate frame (703).
4. A crane stall self-locking device according to claim 3, characterized in that, The bottom ends of the concave bracket (702) are triangular portions (705), and the two ends of the concave plate frame (703) are guide slopes (704), and the guide slopes (704) correspond to the slopes of the concave plate frame (703).
5. A crane stall self-locking device according to claim 4, characterized in that, The concave plate frame (703) has a T-shaped groove (706) on its inclined surface, and a T-shaped slider (707) is slidably arranged inside the T-shaped groove (706), and the T-shaped slider (707) is connected to the guide inclined surface (704).
6. A crane stall self-locking device according to claim 3, characterized in that, The concave bracket (702) has welding blocks (708) arranged in front and behind, and several sets of balls (709) are rolled on the welding blocks (708). The mounting box (3) has arc grooves (301) on the front and back sides inside, and the balls (709) are located in the arc grooves (301).