Elevator ceiling safety protection device

Abstract

The present invention discloses a safety protection device for an elevator ceiling, comprising a car roof, one side of the car roof is fixedly connected to the car wall, and a hanger is provided below the car roof away from the car wall; a mounting hole is provided at the center position of one end of the hanger, and a bolt assembly is sleeved therein, wherein the bolt assembly comprises a bolt column that passes through the mounting hole and the car roof, the end thread of the bolt column is fitted with a nut, and a first self-locking ring and a second self-locking ring that engage with each other are sequentially provided on one side of the nut, and the second self-locking ring is fitted with the surface of the car roof, and the first self-locking ring and the second self-locking ring are both sleeved on the outside of the bolt column; gaps are symmetrically provided on both sides of the hanger away from the mounting hole, and a steel wire rope is passed through one of the gaps. Through the innovative self-locking structure, rigid-flexible dual protection design and adjustable connection scheme, the safety and maintenance convenience of the elevator ceiling are improved, and reliable protection is provided for elevator operation and passenger safety.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator safety, and in particular to a safety protection device for an elevator ceiling. Background Art

[0002] An elevator is an electrically powered vertical transport device that enables the safe and efficient transport of people and goods between different floors of a building through the rising and falling movement of the car within the hoistway. The elevator ceiling safety protection device is a mechanical structure specifically designed to secure and protect the decorative panels on the top of the elevator car. Through a dual protection design that combines rigid fixation with flexible anti-fall protection, it effectively solves the safety hazards of traditional ceiling panels that are prone to loosening and falling off, and together they constitute an important component of the safe and reliable operation of modern elevator systems.

[0003] When installing and fixing existing elevator ceiling panels, there is often a risk of the ceiling panels falling due to the loosening of the bolts in the connecting structure and the lack of an effective self-locking and anti-loosening mechanism. At the same time, the connecting components between the ceiling and the car roof are mostly rigidly fixed, which is inconvenient to adjust during installation and maintenance. In addition, there is a lack of additional flexible protective structures as a double guarantee, making it difficult to cope with sudden structural failures and unable to fully ensure the safety of elevator operation and passengers.

[0004] Therefore, a safety protection device for an elevator ceiling is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a safety protection device for an elevator ceiling panel to solve the problem raised in the above background technology that the bolts of the existing elevator ceiling panels are easy to loosen, lack a self-locking and anti-loosening mechanism, resulting in the risk of falling, and the rigid fixation of the connecting parts makes installation and maintenance inconvenient, and there is no flexible protective structure to deal with sudden failure, making it difficult to ensure safety.

[0006] To achieve the above object, the present invention provides the following technical solution: an elevator ceiling safety protection device, comprising a car roof, one side of the car roof is fixedly connected to a car wall, and a hanger is provided below the side of the car roof away from the car wall;

[0007] A mounting hole is provided at the center of one end of the hanger, and a bolt assembly is sleeved therein. The bolt assembly comprises a bolt column that passes through the mounting hole and the car roof. A nut is threadedly fitted at the end of the bolt column. A first self-locking ring and a second self-locking ring that engage with each other are sequentially provided on one side of the nut, and the second self-locking ring is in contact with the surface of the car roof. The first self-locking ring and the second self-locking ring are both sleeved on the outside of the bolt column.

[0008] The hanger is symmetrically provided with gaps on both sides away from one end of the mounting hole, a steel wire rope is passed through one of the gaps, one end of the steel wire rope is fixedly connected to the hanger through an aluminum alloy clamp, and the other end of the steel wire rope is connected to the ceiling top plate body;

[0009] The steel wire rope is connected to the main body of the ceiling plate through a quick-release mechanism, and the quick-release mechanism includes a base fixedly connected to the main body of the ceiling plate, a connecting column is fixedly connected to the center of the bottom of the base by screws, and a limiting ring and a locking ring are sequentially sleeved on the outer side of the connecting column;

[0010] A ceiling frame is provided on one side of the bottom of the ceiling top plate body, and one end of the ceiling frame away from the ceiling top plate body is fixed to the car roof through a fastening component.

[0011] Preferably, the contact surfaces of the first self-locking ring and the second self-locking ring are provided with mutually matching serrated engaging structures, and the back surfaces of the first self-locking ring and the second self-locking ring are both provided with anti-slip patterns.

[0012] Preferably, a card slot is provided inside the connecting column, and a cross-shaped limit groove composed of a through hole and vertically intersecting limit grooves is provided inside the locking ring. A limit rod is arranged in the cross-shaped limit groove and is sleeved on the card slot. One end of the limit rod is rotatably connected to a tightening knob, one end of the tightening knob passes through the base and is threadedly connected to the connecting column, and the outer side of one end of the limit ring is fixedly connected to the wire rope.

[0013] Preferably, the fastening assembly comprises at least two sets of symmetrically distributed bolt pairs, and each set of bolt pairs is equipped with an anti-loosening washer.

[0014] Preferably, the pendant is made of high-strength aluminum alloy in one piece, and its cross-section is U-shaped.

[0015] Preferably, the surface of the steel wire rope is coated with a polyurethane protective layer.

[0016] Preferably, the dimensional relationship between the width of the gap and the diameter of the wire rope satisfies: an adjustment margin is added on the basis of the diameter of the wire rope, so that the wire rope can be slightly adjusted during maintenance.

[0017] Preferably, an installation gap is provided between the end of the hanger away from the bolt assembly and the car roof, and the steel wire rope passes through the installation gap.

[0018] Compared with the prior art, the beneficial effects of the present invention are: this elevator ceiling safety protection device improves the safety and maintenance convenience of the elevator ceiling through an innovative self-locking structure, a rigid-flexible dual protection design, and an adjustable connection solution, providing reliable protection for elevator operation and passenger safety. The specific contents are as follows:

[0019] 1. Multiple anti-loosening safety measures: By providing a first self-locking ring and a second self-locking ring that engage with each other, combined with a serrated contact surface and anti-slip groove design, the self-locking performance of the bolt assembly is significantly improved, effectively suppressing nut loosening caused by elevator vibration, and eliminating the risk of traditional suspended ceiling panels falling due to loose bolts.

[0020] 2. Combination of flexible protection and rigid fixation: Steel wire rope is used as the secondary protection structure of the ceiling. When the main connection structure fails, the steel wire rope can immediately bear the load; the polyurethane protective layer covering its surface enhances wear resistance and extends service life, forming a dual protection system that combines rigidity and flexibility.

[0021] 3. Convenient adjustment and maintenance: The wire rope is connected to the ceiling plate through a quick-release mechanism. The cross-shaped limit slot and limit rod cooperate to achieve rapid disassembly and assembly, facilitating fine-tuning of the ceiling position during maintenance. The gap width design reserves adjustment margin, allowing small displacement of the wire rope, further optimizing installation flexibility.

[0022] 4. Structural optimization and improved reliability: The U-shaped high-strength aluminum alloy pendant is molded in one piece, combining lightweight with high load-bearing capacity. The fastening components use symmetrical bolt pairs with anti-loosening washers to ensure a stable connection between the ceiling frame and the car roof. The installation gap design provides reasonable routing space for the wire rope to avoid damage due to rigid friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the ceiling plate body of the present invention when in use;

[0024] Figure 2 This is a schematic diagram of the structure of the suspended ceiling panel body during maintenance;

[0025] Figure 3 For the present invention Figure 1 A in the middle is a schematic diagram of the enlarged structure viewed from above;

[0026] Figure 4 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the first self-locking ring and the second self-locking ring in the present invention when they are separated;

[0028] Figure 6 For the present invention Figure 2 Enlarged structural diagram of the quick release mechanism;

[0029] Figure 7 For the present invention Figure 6 Schematic diagram of the three-dimensional structure at the middle base;

[0030] Figure 8Schematic diagram of the explosion structure of the quick release mechanism of the present invention;

[0031] Figure 9 Schematic diagram of the cross-sectional structure of the quick release mechanism of the present invention;

[0032] Figure 10 Schematic diagram of the three-dimensional structure of the connecting column in the present invention;

[0033] Figure 11 It is a schematic diagram of the three-dimensional structure of the locking ring in the present invention.

[0034] In the figure: 1. Car roof; 2. Car wall; 3. Hanging piece; 4. Mounting hole; 5. Bolt assembly; 501. Bolt column; 502. Nut; 503. First self-locking ring; 504. Second self-locking ring; 6. Gap; 7. Steel wire rope; 8. Aluminum alloy chuck; 9. Ceiling top panel body; 10. Ceiling frame; 11. Fastening assembly; 12. Quick release mechanism; 1201. Base; 1202. Connecting column; 12021. Slot; 1203. Limiting ring; 1204. Locking ring; 12041. Through hole; 12042. Limiting slot; 1205. Limiting rod; 1206. Fastening knob. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] See also Figure 1-11 The present invention provides a technical solution: a safety protection device for an elevator ceiling, comprising a car roof 1, one side of the car roof 1 is fixedly connected to a car wall 2, a hanger 3 is provided below the car roof 1 away from the car wall 2; a mounting hole 4 is provided at the center of one end of the hanger 3, a bolt assembly 5 is sleeved inside the hanger 3, the bolt assembly 5 comprises a bolt column 501 passing through the mounting hole 4 and the car roof 1, the end of the bolt column 501 is threadedly fitted with a nut 502, a first self-locking ring 503 and a second self-locking ring 504 that engage with each other are sequentially provided on one side of the nut 502, and the second self-locking ring 504 is in contact with the surface of the car roof 1, and the first self-locking ring 503 and the second self-locking ring 504 are both sleeved on the outside of the bolt column 501;

[0037] The car top 1 and the car wall 2 are fixedly connected by a continuous welding process, which significantly improves the overall structural rigidity; the hanger 3 cooperates with the bolt assembly 5 through the central mounting hole 4 to form a stable axial force-bearing structure, wherein the design of the bolt column 501 penetrating the car top 1 realizes the direct transmission of the load to the main frame of the car, effectively avoiding local stress concentration; the double anti-loosening design specially adopted includes: the first self-locking ring 503 and the second self-locking ring 504 generate radial locking force through mutually meshing serrated surfaces, and the friction resistance formed by the anti-slip grooves constitutes a three-dimensional anti-loosening mechanism. At the same time, the self-locking ring adopts a wedge-shaped locking structure with a cam inclination angle significantly greater than the thread angle, so that the fastening ring generates radial expansion under axial tension to form a rigid bite. This double anti-loosening design fundamentally solves the loosening problem caused by vibration or settlement, and ensures the long-term stability and reliability of the connection structure;

[0038] Gaps 6 are symmetrically provided on both sides of the end of the hanger 3 away from the mounting hole 4. A steel wire rope 7 is passed through one of the gaps 6. One end of the steel wire rope 7 is fixedly connected to the hanger 3 via an aluminum alloy clamp 8, and the other end of the steel wire rope 7 is connected to the ceiling top plate body 9. A ceiling frame 10 is fitted on one side of the bottom of the ceiling top plate body 9. The end of the ceiling frame 10 away from the ceiling top plate body 9 is fixed to the car roof 1 via a fastening assembly 11.

[0039] The symmetrical gaps 6 on both sides of the hanger 3 effectively maintain the structural strength of the hanger body while ensuring the flexible insertion of the wire rope 7. Together with the high-strength aluminum alloy clamp 8, a second fixing system independent of the bolt assembly 5 is formed. A rigid-flexible composite connection method is adopted between the ceiling top plate body 9 and the ceiling frame 10. Through the synergistic effect of the flexible connection of the wire rope and the rigid fixation of the frame, optimized load distribution is achieved, with static loads borne by the frame and dynamic loads buffered by the elastic deformation of the wire rope. A modular connection design is adopted for maintenance. The top plate can be removed separately by selectively releasing the fastening assembly 11 or the wire rope 7 connection. Combined with the specially designed interface structure between the ceiling frame 10 and the car roof 1, the efficiency of disassembly and assembly is improved.

[0040] The steel wire rope 7 is connected to the ceiling plate body 9 through a quick-release mechanism 12. The quick-release mechanism 12 includes a base 1201 fixedly connected to the ceiling plate body 9. A connecting column 1202 is fixedly connected to the bottom center of the base 1201 by screws. A limiting ring 1203 and a locking ring 1204 are sequentially sleeved on the outer side of the connecting column 1202.

[0041] By providing a quick-release mechanism 12, the ceiling panel main body 9 can be quickly installed;

[0042] The contact surfaces of the first self-locking ring 503 and the second self-locking ring 504 are provided with mutually matching serrated engagement structures, and the back surfaces of the first self-locking ring 503 and the second self-locking ring 504 are provided with anti-slip lines;

[0043] The matching serrated engagement structure creates a mechanical interlock, generating a self-tightening effect under vibration conditions. The optimized tooth profile angle of 30° to 45° evenly converts axial preload into radial locking force, effectively avoiding stress concentration and extending fatigue life. The directional arrangement of the anti-slip grooves (concentric circles) ensures controllable friction resistance during installation.

[0044] A slot 12021 is provided inside the connecting column 1202, and a cross-shaped limiting groove consisting of a through hole 12041 and a limiting groove 12042 intersecting vertically is provided inside the locking ring 1204. A limiting rod 1205 is disposed in the cross-shaped limiting groove and is sleeved on the slot 12021. One end of the limiting rod 1205 is rotatably connected to a tightening knob 1206. One end of the tightening knob 1206 passes through the base 1201 and is threadedly connected to the connecting column 1202. The outer side of one end of the limiting ring 1203 is fixedly connected to the wire rope 7.

[0045] When it is necessary to release the connection between the wire rope 7 and the ceiling top plate body 9, the operator loosens the tightening knob 1206 in the opposite direction. Under the action of the threaded transmission, the tightening knob 1206 moves axially upward along the connecting column 1202, driving the limiting rod 1205 to move upward synchronously, so that it gradually disengages from the radial limiting groove 12042 of the locking ring 1204; then, the locking ring 1204 is rotated 90 degrees to remove the limiting rod 1205 from the through hole 12041, so that the locking ring 1204 loses its radial constraint and can slide freely axially along the outer side of the connecting column 1202. At this time, the clamping force of the locking ring 1204 on the limiting ring 1203 disappears; at this time, the limiting ring 1203 is no longer axially constrained by the locking ring 1204, and can slide upward along the outer side of the connecting column 1202 as the wire rope 7 is pulled, and finally disengages from the end of the connecting column 1202, realizing the rapid separation of the wire rope 7 from the quick-release mechanism 12 and the ceiling top plate body 9;

[0046] The fastening assembly 11 comprises at least two sets of symmetrically distributed bolt pairs, each set of bolt pairs is equipped with a locking washer;

[0047] Two sets of symmetrically distributed bolt pairs are used to form a stable couple structure, which improves the uniformity of pressure distribution on the joint surface between the ceiling frame 10 and the car roof 1, effectively eliminating the risk of unilateral warping and deformation;

[0048] The pendant 3 is made of high-strength aluminum alloy in one piece, and its cross section is a U-shaped structure;

[0049] Pendant 3 adopts high-strength aluminum alloy one-piece molding process, providing good tensile strength and excellent yield strength while maintaining lightweight characteristics; the excellent damping coefficient of aluminum alloy material combined with the multiple vibration attenuation surfaces formed by the U-shaped closed cross-section reduces the vibration transmission rate.

[0050] The surface of the steel wire rope 7 is coated with a polyurethane protective layer;

[0051] The polyurethane protective layer provides excellent surface protection for the steel rope 7, effectively resisting friction loss during elevator operation and significantly extending the service life of the steel rope. The unique elastic properties of the polyurethane material effectively absorb and buffer the vibration energy during elevator operation, significantly reducing the resulting operating noise and improving passenger comfort. The polyurethane protective layer forms a dense protective barrier that completely isolates the steel rope from water, moisture, and corrosive gases, improving the corrosion resistance of the steel rope in humid environments and making it particularly suitable for elevator applications in high-humidity areas.

[0052] The relationship between the width of the gap 6 and the diameter of the wire rope 7 satisfies the following: an adjustment margin is added to the diameter of the wire rope 7 so that the wire rope 7 can be slightly adjusted during maintenance;

[0053] The width of the gap 6 is optimized to be slightly larger than the diameter of the wire rope 7, which ensures that the wire rope 7 can be smoothly threaded while avoiding the shaking problem caused by an excessively large gap, thereby achieving the best fitting accuracy.

[0054] An installation gap is provided between the end of the hanger 3 away from the bolt assembly 5 and the car roof 1, and the wire rope 7 passes through the installation gap;

[0055] The installation gap forms a visual channel, which is convenient for visual inspection of the wear condition of the wire rope 7; during maintenance, the wire rope 7 can be directly contacted through the gap, and adjustment operations can be carried out without disassembly; and the gap structure cuts off the direct transmission path of vibration, thereby reducing the high-frequency vibration transmission rate and cooperating with the flexible characteristics of the wire rope 7 to form a double vibration isolation system.

[0056] Working principle: Before using this elevator ceiling safety protection device, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Figure 11 As shown, the entire device uses the car roof 1 as its supporting base, forming a dual fixing system through the bolt assembly 5 and the fastening assembly 11. At the connection between the hanger 3 and the car roof 1, the bolt column 501 penetrates the mounting hole 4 and the car roof 1, and a pre-tightening force is applied by the nut 502 to achieve initial fixation. At this time, the first self-locking ring 503 and the second self-locking ring 504 engage with each other through a serrated locking structure. The anti-slip grooves on the contact surface increase frictional resistance, effectively preventing the nut 502 from loosening due to elevator operation vibration, forming a mechanical self-locking effect, and ensuring the long-term stability of the connection between the hanger 3 and the car roof 1.

[0057] The load of the ceiling panel 9 is primarily transmitted to the hanger 3 via a steel wire rope 7. After passing through the gap 6 in the hanger 3, the steel wire rope 7 is rigidly secured by an aluminum alloy clamp 8. A polyurethane protective coating on the surface reduces friction loss and enhances corrosion resistance. The allowance for adjustment in the gap 6, combined with the installation clearance between the hanger 3 and the car roof 1, facilitates tension adjustment and maintenance of the steel wire rope 7, ensuring balanced force distribution.

[0058] The quick-release mechanism 12 realizes a convenient connection between the ceiling top panel main body 9 and the wire rope 7: by rotating the tightening knob 1206, the limiting rod 1205 is driven to move along the slot 12021, so that the limiting rod 1205 completes radial limitation and axial locking in the cross-shaped limiting groove of the locking ring 1204, which not only ensures the connection strength, but also can be quickly separated through reverse operation, thereby improving maintenance efficiency.

[0059] Furthermore, the ceiling frame 10 is secured to the car roof 1 via a bolt pair and anti-loosening washers in a fastening assembly 11, forming a supplementary support structure in contact with the bottom of the ceiling panel 9. This design disperses the load on the ceiling panel, preventing structural deformation caused by excessive single-point loads. Combined with the suspension system of the wire rope 7, it provides three-dimensional protection, effectively addressing complex operating conditions such as impact and vibration during elevator operation, preventing the ceiling panel 9 from accidentally falling off, and ensuring safe operation within the elevator car.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An elevator ceiling safety protection device, comprising a car roof (1), characterized in that: One side of the car top (1) is fixedly connected to a car wall (2), and a hanging part (3) is provided below the side of the car top (1) away from the car wall (2); A mounting hole (4) is provided at the center of one end of the hanger (3), and a bolt assembly (5) is sleeved therein, wherein the bolt assembly (5) comprises a bolt column (501) penetrating the mounting hole (4) and the car roof (1), and a nut (502) is threadedly fitted at the end of the bolt column (501), and a first self-locking ring (503) and a second self-locking ring (504) that engage with each other are sequentially provided on one side of the nut (502), and the second self-locking ring (504) is in contact with the surface of the car roof (1), and the first self-locking ring (503) and the second self-locking ring (504) are both sleeved on the outside of the bolt column (501); Gaps (6) are symmetrically provided on both sides of one end of the hanger (3) away from the mounting hole (4), a steel wire rope (7) is passed through one of the gaps (6), one end of the steel wire rope (7) is fixedly connected to the hanger (3) via an aluminum alloy clamp (8), and the other end of the steel wire rope (7) is connected to the ceiling plate body (9); The steel wire rope (7) is connected to the ceiling plate body (9) via a quick-release mechanism (12), wherein the quick-release mechanism (12) comprises a base (1201) fixedly connected to the ceiling plate body (9), a connecting column (1202) is fixedly connected to the center of the bottom of the base (1201) via screws, and a limiting ring (1203) and a locking ring (1204) are sequentially sleeved on the outer side of the connecting column (1202); A ceiling frame (10) is provided on one side of the bottom of the ceiling panel body (9), and the end of the ceiling frame (10) away from the ceiling panel body (9) is fixed to the car roof (1) through a fastening component (11).

2. The elevator ceiling safety protection device according to claim 1, characterized in that: The contact surfaces of the first self-locking ring (503) and the second self-locking ring (504) are provided with mutually matching sawtooth-shaped engaging structures, and the back surfaces of the first self-locking ring (503) and the second self-locking ring (504) are both provided with anti-slip lines.

3. The elevator ceiling safety protection device according to claim 1, characterized in that: A card slot (12021) is provided inside the connecting column (1202), and a cross-shaped limiting groove consisting of a through hole (12041) and a vertically intersecting limiting groove (12042) is provided inside the locking ring (1204). A limiting rod (1205) is arranged in the cross-shaped limiting groove and is sleeved on the card slot (12021). One end of the limiting rod (1205) is rotatably connected to a tightening knob (1206), one end of the tightening knob (1206) passes through the base (1201) and is threadedly connected to the connecting column (1202), and the outer side of one end of the limiting ring (1203) is fixedly connected to the wire rope (7).

4. The elevator ceiling safety protection device according to claim 1, characterized in that: The fastening assembly (11) comprises at least two sets of symmetrically distributed bolt pairs, and each set of bolt pairs is equipped with an anti-loosening washer.

5. The elevator ceiling safety protection device according to claim 1, characterized in that: The hanging piece (3) is made of high-strength aluminum alloy in one piece, and its cross section is a U-shaped structure.

6. The elevator ceiling safety protection device according to claim 1, characterized in that: The surface of the steel wire rope (7) is coated with a polyurethane protective layer.

7. The elevator ceiling safety protection device according to claim 1, characterized in that: The dimensional relationship between the width of the gap (6) and the diameter of the steel wire rope (7) satisfies the following conditions: an adjustment margin is added on the basis of the diameter of the steel wire rope (7), so that the steel wire rope (7) can be slightly adjusted during maintenance.

8. The elevator ceiling safety protection device according to claim 1, characterized in that: An installation gap is provided between the end of the hanger (3) away from the bolt assembly (5) and the car roof (1), and the steel wire rope (7) passes through the installation gap.

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