Anti-falling device for elevator car

Abstract

The utility model provides an anti-falling device for an elevator car, which belongs to the technical field of elevator protection and comprises an outer frame, compression springs fixed on two sides of the top end of the outer frame, electromagnets fixed on two sides of the top end of the outer frame, and springs fixed on two sides of the top end of the outer frame. The moving structure comprises a lead screw which is rotationally connected with the interior of one side of one mounting frame and is in threaded connection with the outer frame, a hand wheel fixed to one side of the lead screw and a synchronous assembly arranged on one side of the mounting frame, and a damping structure is arranged at the bottom end of the outer frame. According to the utility model, the hand wheel is rotated to enable the rocker arm and the transmission arm to adjust the distance between the two groups of wedge blocks, and the nut is rotated to lock and fix the position of the mounting frame, so that the gap adjustment function of the device is realized, the distance between the wedge blocks can be conveniently adjusted according to the width of the elevator guide rail, and the safety is obviously improved; the guide rail can be clamped in time to prevent falling when the elevator is abnormal, meanwhile, the reasonable distance is beneficial to reducing operation noise and vibration, and the riding comfort is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to elevator protection technical field, concretely relates to an elevator car anti-falling device. BACKGROUND

[0002] The elevator car anti-falling device is a passive safety device, which is used for responding to elevator failures, such as wire rope breakage or control failure, and the main function is to prevent the car from falling rapidly, and the speed detection device and the brake device are started rapidly when the elevator is abnormally accelerated, so that the car is braked urgently, thereby protecting the life safety of passengers, enhancing the confidence of passengers in the safety of the elevator, and improving the riding experience.

[0003] A Chinese patent with publication number 202322674872.3 discloses an elevator car anti-falling device, which solves the problem that the car elevator cannot achieve better anti-falling effect during use, leading to personnel casualties caused by elevator falling, thereby failing to achieve better safety. It comprises a mounting plate, a control switch fixedly installed on the outer side of the mounting plate, a storage battery fixedly installed on both sides of the control switch, an anti-falling mechanism installed on the outer side of the mounting plate below the control switch, a trigger assembly installed on the top end of both sides of the mounting plate, an anti-falling mechanism comprising a shell fixedly installed on the outer side of the mounting plate, a drive motor fixedly installed on the outer side of the shell, and a transmission gear installed in the shell. The utility model can achieve better anti-falling effect during use of the car elevator, avoid the situation of personnel casualties caused by elevator falling, and achieve better safety.

[0004] The above-mentioned patent still has the following disadvantages: it is inconvenient to adapt to the defects of elevators of different specifications. Since elevators of different brands and models have different elevator guide rail widths, it is difficult to ensure the rationality of the gap between the wedge and the guide rail during use of the device, which reduces the stability and comfort of elevator operation, increases maintenance difficulty and cost, and is not conducive to long-term stable operation of the elevator. UTILITY MODEL CONTENTS

[0005] The utility model provides an elevator car anti-falling device to solve the problems in the above background art.

[0006] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0007] The utility model discloses an elevator car anti-falling device, which comprises an outer frame, and further comprises:

[0008] The compression spring is fixed on both sides of the top end of the outer frame, and the top end of the compression spring is fixed with a push plate, and the inside of the push plate is slidably connected with a guide rod connected with the outer frame.

[0009] Electromagnet, fixed on both sides of the top end of the outer frame;

[0010] Acceleration sensor, mounted on one side of the outer frame;

[0011] Mounting bracket, provided on both sides of the inside and having a connecting bracket inside, a wedge block slidingly connected inside the connecting bracket, and a connecting rod rotatably connected to one side of the wedge block;

[0012] Baffle, fixed on both sides of the bottom end of the inside of the outer frame;

[0013] Moving structure, provided on one side of the mounting bracket, wherein the moving structure comprises a lead screw rotatably connected to one side of the inside of one set of mounting brackets and threadedly connected to the outer frame, a hand wheel fixed to one side of the lead screw, and a synchronization assembly provided on one side of the mounting bracket;

[0014] Damping structure, provided at the bottom end of the outer frame, for reducing vibration generated during braking;

[0015] Fixed bracket, provided at the bottom end of the damping structure.

[0016] According to the above technical solution, the device is installed at the top end of the elevator car, and the elevator guide rail is located at the middle position between the two sets of wedge blocks. The two sets of mounting brackets are moved to adjust the distance between the two sets of wedge blocks. When the elevator encounters an emergency situation, the falling speed of the elevator is detected by the acceleration sensor and fed back to the elevator controller, so that the controller disconnects the circuit of the electromagnet according to the data, stops the generation of magnetic force by the electromagnet, and pushes the push plate and the connecting rod upward by the compressed compression spring, so that the connecting rod drives the left and right sets of wedge blocks to move upward and contact the elevator guide rail. The left and right sets of wedge blocks clamp and fix the guide rail to fix the position of the elevator, and the damping structure buffers the vibration during the fixing process.

[0017] Further, the synchronization assembly comprises a guide groove provided in the inside of one side of the outer frame, a fixed screw rod fixed to one side of the mounting bracket and slidingly connected to the guide groove, a nut threadedly connected to the outside of the fixed screw rod, a rocker arm rotatably connected to one side of the outer frame, and a transmission arm rotatably connected to both ends of the rocker arm and rotatably connected to the mounting bracket.

[0018] According to the above technical solution, the rocker arm and the transmission arm are adjusted to adjust the distance between the two sets of wedge blocks by rotating the hand wheel, and the position of the mounting bracket is locked and fixed by rotating the nut.

[0019] Further, the transmission arm is provided with two sets, and the two sets of transmission arms are distributed in parallel, and the fixed screw rod passes through the guide groove and is connected to the nut.

[0020] According to the above technical solution, the left and right sets of mounting brackets are synchronously and reversely moved by the two sets of parallel transmission arms.

[0021] Further, the outer wall of the lead screw is provided with external threads, and the inner wall of one side of the outer frame is provided with internal threads matched with the external threads.

[0022] Through the above technical scheme, the lead screw drives one group of mounting frames to move through the engagement of the threads, so as to adjust the position of the mounting frames.

[0023] Further, the damping structure comprises slide rods fixed at the two sides of the bottom end of the outer frame, support frames sliding on the outer sides of the slide rods and connected with the fixed frames, moving plates fixed at the bottom end of the slide rods, buffer springs installed between the moving plates and the support frames, pistons fixed in the support frames, holes in the pistons, and oil cylinders fixed at the top end of the moving plates and slidingly connected with the pistons.

[0024] Through the above technical scheme, the support frames extrude the buffer springs to contract, so as to preliminarily buffer the impact force, and the pistons push the hydraulic oil to flow out through the holes to generate damping force, so as to further buffer the impact force.

[0025] Further, the slide rods are symmetrically distributed on the vertical center line of the pistons, and the inner walls of the oil cylinders are filled with hydraulic oil.

[0026] Through the above technical scheme, the hydraulic oil passes through the holes to generate damping force, so as to buffer the impact force.

[0027] The above scheme of the utility model at least has the following beneficial effects:

[0028] The utility model discloses, through rotating hand wheel, make swing arm and transmission arm adjust the interval between two groups of wedge blocks, and the position of mounting frame is locked and fixed by rotating nut, thereby realize this device's clearance adjustment function, it is convenient for according to the width of elevator guide rail adjustment wedge block's interval, significantly improve security, ensure in time clamping guide rail and preventing falling when elevator is abnormal, and reasonable interval helps reduce running noise and vibration, improve ride comfort.

[0029] The utility model discloses, through support frame extruding buffer spring to contract, preliminarily buffer impact force, and piston pushes hydraulic oil to flow out through hole and generates damping force, further buffer impact force, thereby realize this device's buffer damping function, effectively absorb the huge impact force that elevator generates when emergency brake, prevent car from being damaged because of violent impact, thereby protect the passenger from being hurt. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is one of the structural schematic diagram of the utility model;

[0031] Figure 2 It is the second structural schematic diagram of the utility model;

[0032] Figure 3The utility model provides a mobile structure three dimensional structure schematic diagram is provided.

[0033] Figure 4 The utility model provides a damping structure three dimensional section structure schematic diagram.

[0034] Mark explanation:

[0035] 1, outer frame, 2, mobile structure, 201, hand wheel, 202, screw rod, 203, fixed screw, 204, nut, 205, transmission arm, 206, rocker arm, 207, guide slot, 3, mounting bracket, 4, push plate, 5, connecting rod, 6, electromagnet, 7, guide rod, 8, compression spring, 9, damping structure, 901, moving plate, 902, piston, 903, hole slot, 904, buffer spring, 905, slide rod, 906, oil cylinder, 907, support frame, 10, fixed frame, 11, connecting frame, 12, wedge block, 13, baffle, 14, acceleration sensor. DETAILED DESCRIPTION

[0036] Exemplary embodiments of the utility model will be described hereinafter in greater detail with reference to the accompanying drawings. Although the exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the utility model can be more thoroughly understood and the scope of the utility model can be fully conveyed to those skilled in the art.

[0037] As Figures 1 to 4 Indicated in the utility model embodiment, an elevator car anti-falling device is provided, which comprises an outer frame 1 and further comprises:

[0038] Compression spring 8 is fixed at both sides of the top end of outer frame 1, and the top end of compression spring 8 is fixed with push plate 4, and the inside of push plate 4 is slidably connected with guide rod 7 connected with outer frame 1;

[0039] Electromagnet 6 is fixed at both sides of the top end of outer frame 1;

[0040] Acceleration sensor 14 is installed on one side of outer frame 1;

[0041] Mounting bracket 3 is arranged at both sides of the inside, and the inside of mounting bracket 3 is provided with connecting frame 11, the inside of connecting frame 11 is slidably connected with wedge block 12, and one side of wedge block 12 is rotatably connected with connecting rod 5;

[0042] Baffle 13 is fixed at both sides of the bottom end of the inside of outer frame 1;

[0043] The moving structure 2 is arranged on one side of the mounting frame 3, wherein the moving structure 2 comprises a screw rod 202 rotatably connected to one side of the mounting frame 3 and threadedly connected to the outer frame 1, a hand wheel 201 fixed to one side of the screw rod 202, and a synchronous assembly arranged on one side of the mounting frame 3;

[0044] The damping structure 9 is arranged at the bottom end of the outer frame 1 and used for reducing vibration generated in the braking process.

[0045] The fixing frame 10 is arranged at the bottom end of the damping structure 9.

[0046] In the embodiment of the utility model, the device is installed at the top end of the elevator car, and the elevator guide rail is located at the middle position between the two groups of wedge blocks 12, the two groups of mounting frames 3 are pushed to move, and the spacing between the two groups of wedge blocks 12 is adjusted, when the elevator encounters an emergency situation, the falling speed of the elevator is detected by the acceleration sensor 14 and fed back to the elevator controller, the controller disconnects the circuit of the electromagnet 6 according to the data, the electromagnet 6 stops generating magnetic force, the compressed compression spring 8 pushes the push plate 4 and the connecting rod 5 to move upwards, the connecting rod 5 drives the two groups of wedge blocks 12 to move upwards and contact with the elevator guide rail, the left and right two groups of wedge blocks 12 clamp and fix the guide rail, the position of the elevator is fixed, and the damping structure 9 buffers the vibration in the fixing process.

[0047] As shown in Figures 2 to 3 The synchronous assembly comprises a guide groove 207 formed in the inner side of the outer frame 1, a fixed screw rod 203 fixed to one side of the mounting frame 3 and slidably connected with the guide groove 207, a nut 204 threadedly connected to the outer side of the fixed screw rod 203, a rocker arm 206 rotatably connected to one side of the outer frame 1, and two transmission arms 205 rotatably connected to the two ends of the rocker arm 206 and rotatably connected with the mounting frame 3, the two transmission arms 205 are arranged in parallel, the fixed screw rod 203 passes through the guide groove 207 and is connected with the nut 204, the outer side wall of the screw rod 202 is provided with external threads, and the inner side of one side of the outer frame 1 is provided with internal threads matched with the external threads.

[0048] In the embodiment of the utility model, the hand wheel 201 is rotated to drive the screw rod 202 to move left and right in the inner side of the outer frame 1, and the screw rod 202 drives one group of mounting frames 3 to move, the mounting frame 3 drives the rocker arm 206 to rotate through one group of transmission arms 205, the rocker arm 206 drives the other group of transmission arms 205 to move, and the left and right two groups of mounting frames 3 synchronously and reversely move, so that the spacing between the two groups of wedge blocks 12 is adjusted, the fixed screw rod 203 slides in the inner side of the guide groove 207 to guide the movement of the mounting frame 3, and the nut 204 is rotated to move the nut 204 outward from the threads on the surface of the fixed screw rod 203 to the outer frame 1 and contact with the outer frame 1, so that the position of the mounting frame 3 is locked and fixed.

[0049] As Figure 4 The damping structure 9 includes slide bars 905 fixed on both sides of the bottom end of the outer frame 1, support frames 907 sliding outside the slide bars 905 and connected with the fixed frame 10, moving plates 901 fixed on the bottom end of the slide bars 905, buffer springs 904 installed between the moving plates 901 and the support frames 907, pistons 902 fixed inside the support frames 907, hole grooves 903 opened inside the pistons 902, and oil cylinders 906 fixed on the top end of the moving plates 901 and slidingly connected with the pistons 902, the slide bars 905 are symmetrically distributed on the vertical center line of the pistons 902, and the inside of the oil cylinder 906 is filled with hydraulic oil.

[0050] In the embodiment of the utility model, when the wedge block 12 clamps the elevator guide rail, the movement of the elevator is terminated by the damping structure 9 and the fixed frame 10, the support frame 907 is pulled to move downward by the fixed frame 10 affected by the inertia of the elevator, the support frame 907 is extruded to contract the buffer spring 904, the impact force is preliminarily buffered, at the same time, the support frame 907 drives the piston 902 to move inside the oil cylinder 906, the piston 902 extrudes the hydraulic oil inside the oil cylinder 906, the hydraulic oil flows out through the hole groove 903 to generate damping force under the pushing of the piston 902, the impact force is further buffered, after the buffering is completed, the compressed buffer spring 904 is stretched to push the piston 902 to reset, so as to be used repeatedly.

[0051] The above is the preferred embodiment of the utility model, it should be pointed out that, for ordinary technical personnel in the prior art, without departing from the principle of the utility model, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the utility model.

Claims

1. Elevator car arresting gear comprising an outer frame (1), characterized in that Also include: Compression spring (8) is fixed at the top of the two sides of the frame (1), and the top of the compression spring (8) is fixed with a push plate (4), the inside of the push plate (4) is slidably connected with a guide rod (7) connected with the frame (1); Electromagnet (6) is fixed on both sides of the top of the frame (1); Acceleration sensor (14) is installed on one side of the frame (1); Mounting bracket (3) is provided on both sides of the inside, and the inside of the mounting bracket (3) is provided with a connecting bracket (11), the inside of the connecting bracket (11) is slidably connected with a wedge block (12), one side of the wedge block (12) is rotatably connected with a connecting rod (5); The baffle (13) is fixed on both sides of the bottom of the inside of the frame (1); The moving structure (2) is provided on one side of the mounting bracket (3), wherein the moving structure (2) comprises a screw rod (202) rotatably connected to one side of the inside of one of the mounting brackets (3) and threadedly connected with the frame (1), a hand wheel (201) fixed on one side of the screw rod (202), and a synchronous assembly provided on one side of the mounting bracket (3); The damping structure (9) is provided at the bottom of the frame (1) to reduce the vibration generated during braking; The fixed frame (10) is provided at the bottom of the damping structure (9).

2. An elevator car arresting device according to claim 1, characterized in that The synchronous assembly comprises a guide groove (207) formed in the inside of one side of the frame (1), a fixed screw rod (203) fixed on one side of the mounting bracket (3) and slidably connected with the guide groove (207), a nut (204) threadedly connected on the outside of the fixed screw rod (203), a rocker arm (206) rotatably connected on one side of the frame (1), and a transmission arm (205) rotatably connected on both ends of the rocker arm (206) and rotatably connected with the mounting bracket (3).

3. An elevator car arresting device according to claim 2, characterized in that The transmission arm (205) is provided with two groups, and the two groups of transmission arms (205) are distributed in parallel, and the fixed screw rod (203) passes through the guide groove (207) and is connected with the nut (204).

4. An elevator car arresting device according to claim 2, wherein The outside wall of the screw rod (202) is provided with external threads, and the inside of one side of the frame (1) is provided with internal threads matched with the external threads.

5. An elevator car arresting device according to claim 1, wherein The damping structure (9) comprises a slide rod (905) fixed on both sides of the bottom of the frame (1), a support frame (907) slidably connected on the outside of the slide rod (905) and connected with the fixed frame (10), a moving plate (901) fixed on the bottom of the slide rod (905), a buffer spring (904) installed between the moving plate (901) and the support frame (907), a piston (902) fixed in the support frame (907), a hole slot (903) formed in the inside of the piston (902), and an oil cylinder (906) fixed on the top of the moving plate (901) and slidably connected with the piston (902).

6. An elevator car arresting device according to claim 5, characterized in that The slide rod (905) is symmetrically distributed on the vertical center line of the piston (902), and the inside of the oil cylinder (906) is filled with hydraulic oil.

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