Elevator anti-falling device

Abstract

The application relates to an elevator anti-falling device which comprises an elevator car, a guide rail, a roller, a first fixing base, a first rotating shaft, a transmission assembly, a clutch assembly, a driving shaft, a push plate and a brake assembly. The guide rail is installed on one side of the elevator car, the first fixing base is fixed on the top of the elevator car, the first rotating shaft is rotatably installed on the first fixing base, the first rotating shaft penetrates through the roller, and the roller is matched in the guide rail. The clutch assembly is installed on the elevator car and is arranged on one side of the first rotating shaft at intervals, the transmission assembly is connected between the clutch assembly and the first rotating shaft, the driving shaft is fixed on the output end of the clutch assembly, the push plate is slidably installed on the elevator car, and the front end of the push plate is threadedly connected with the rear end of the driving shaft. The brake assembly comprises a rotating base, a guide rod, a brake rod and a brake pad assembly. After the scheme is adopted, when the elevator rope is broken and the elevator car falls, the elevator car can be effectively braked, and the elevator car can be prevented from falling all the time.

Description

TECHNICAL FIELD

[0001] The present application relates to an elevator anti-falling device. BACKGROUND

[0002] An elevator is a permanent conveyance serving a number of specific floors in a building, whose car moves in at least two vertical or inclined at an angle of less than 15° to the horizontal plane rigid tracks. There are also step type, step board on the continuous operation of the track, commonly known as escalator or moving sidewalk. Fixed lifting device serving the specified floor. Vertical lifting elevator has a car that moves between at least two vertical or inclined at an angle of less than 15° rigid guide rails. The size and structure of the car facilitate passenger access or cargo loading and unloading. Regardless of its drive mode, the elevator is generally referred to as a vertical transportation tool in a building.

[0003] The elevator is lifted by a motor driving a steel wire rope fixed at one end of the elevator car body. In order to avoid the elevator from falling due to failure, an elevator speed limiter is also provided on the elevator. The speed limiter forms a closed loop by winding the steel wire rope around the rope wheel and the rope expansion wheel in the pit. The rope head is fastened with the car and is connected with the safety clamp through a mechanical link. If the car speed exceeds, the speed limiter will act immediately to trigger the rope clamping device to clamp the steel wire rope. When the car descends, the steel wire rope pulls the safety clamp to operate and generate friction force on the guide rail, so as to quickly brake the car on the guide rail and stop moving. However, this situation only applies to the above case. When the steel wire rope of the traction elevator is broken, there is no good protection and the elevator car cannot be effectively prevented from falling. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an elevator anti-falling device which can effectively brake the elevator car when the elevator rope is broken and the elevator car falls.

[0005] In order to solve the above technical problems, the technical solutions provided by the present application are as follows:

[0006] The application discloses an elevator anti-falling device, which comprises an elevator car, a guide rail, a roller, a first fixing base, a first rotating shaft, a transmission assembly, a clutch assembly, a driving shaft, a push plate and a brake assembly, the guide rail is installed on one side of the elevator car, the first fixing base is fixed on the top of the elevator car, the first rotating shaft is rotatably installed on the first fixing base, the first rotating shaft penetrates through the roller, the roller is fixedly connected with the first rotating shaft, and the roller rolls in the guide rail along with the lifting of the elevator car; the clutch assembly is installed on the elevator car and is arranged at the side of the first rotating shaft, the transmission assembly is connected between the clutch assembly and the first rotating shaft, the driving shaft is fixed on the output end of the clutch assembly, the push plate is slidably installed on the elevator car, and the front end of the push plate is threadedly connected with the rear end of the driving shaft; the brake assembly comprises a rotating base, a guide rod, a brake rod and a brake pad assembly, the middle part of the rotating base is sleeved on the guide rod, the left half of the rotating base is provided with a strip-shaped hole, the rear end of the push plate is provided with a connecting rod, and the connecting rod is matched in the strip-shaped hole; the brake pad assembly is provided with two groups, the two groups of brake pad assemblies are respectively fixed on the front side of the left end of the rotating base and the rear side of the right end of the rotating base; the brake rod is provided with two, the two brake rods and the two brake pad assemblies are arranged in one-to-one correspondence, and the brake rod is located on the movement track of the brake pad assembly; the clutch assembly comprises a second fixing base, a second rotating shaft and a clutch, the second fixing base is arranged at the side of the first fixing base, the second fixing base is provided with two, the clutch is arranged between the two second fixing bases, the second rotating shaft and the driving shaft are respectively fixed on the input end and the output end of the clutch, and the second rotating shaft and the driving shaft are respectively rotatably connected with the two second fixing bases; the transmission assembly comprises a transmission wheel and a transmission belt, the transmission wheel is provided with two, the two transmission wheels are respectively fixed on the first rotating shaft and the second rotating shaft, and the transmission belt is matched on the two transmission wheels; the front end of the push plate is provided with a threaded hole, the rear end of the driving shaft is provided with a screw rod, and the screw rod is matched in the threaded hole; the clutch comprises a base, an end cover, a second elastic member, a clutch block and a limiting assembly, the end cover is rotatably connected with the base, the second rotating shaft is fixedly connected with the base, the driving shaft is fixedly connected with the end cover, the base is provided with a guide groove, the guide groove is provided with two, the clutch block is provided with two, the two clutch blocks are slidably matched in the guide groove, the second elastic member is arranged between the two clutch blocks, and the two ends of the second elastic member are connected with the two clutch blocks; the inner wall of the end cover is provided with a clamping block, the base rotates at a high speed, the clutch block slides to one side of the clamping block, the clutch block drives the clamping block to rotate, and the clamping block drives the end cover to rotate.The limiting assembly is installed in the guide groove, and is located at one side of the sliding direction of the clutch block, and the limiting assembly fixes the clutch block after the clutch block slides outward; the limiting assembly comprises a third elastic member and a limiting block, the side surface of the clutch block is provided with a clamping groove, the side surface of the guide groove is provided with a mounting groove, the third elastic member is installed in the mounting groove, the limiting block is slidingly fitted in the mounting groove, and the end portion of the limiting block is provided with an inclined surface which is abutted against the end portion of the clutch block under the action of the third elastic member.

[0007] Preferably, the brake pad assembly comprises a brake pad fixing seat, an elastic member and a brake pad, the brake pad fixing seat is fixed at the end portion of the rotating seat, the brake pad is transversely and slidingly installed on the brake pad fixing seat, and the elastic member is arranged between the brake pad and the brake pad fixing seat, and the two ends of the elastic member are connected with the brake pad and the brake pad fixing seat respectively.

[0008] Preferably, the cross section of the brake lever is circular, and the cross section of the brake pad is semicircular.

[0009] The beneficial effect of the present application is that when the steel wire rope is broken or the elevator falls due to other reasons, the falling of the elevator car will accelerate, so that the rotating speed of the roller is accelerated, thereby accelerating the rotating speed of the first rotating shaft, under the transmission of the transmission assembly, the rotating speed of the clutch assembly is accelerated, thereby promoting the clamping between the front and rear two parts of the clutch assembly, then promoting the rotation of the driving shaft, since the driving shaft is threadedly connected with the push plate and the push plate is slidingly installed on the elevator car, the rotation of the driving shaft promotes the sliding of the push plate, the sliding of the push plate promotes the rotation of the rotating seat, and the rotation of the rotating seat promotes the brake pad assembly to support on the brake lever for braking, until the elevator car stops falling. In this way, the entire braking process does not rely on the steel wire rope, as long as the elevator car falls, the falling speed of the elevator car will be accelerated, thereby gradually starting the brake assembly until the elevator car stops falling. BRIEF DESCRIPTION OF DRAWINGS

[0010] The present application will be further described below in combination with the drawings and specific embodiments:

[0011] Figure 1 It is a structural schematic view of the embodiment of the elevator anti-falling device.

[0012] Figure 2 It is a partial structural schematic view of the embodiment of the elevator anti-falling device.

[0013] Figure 3 It is an explosion view of the clutch in the embodiment.

[0014] Figure 4Schematic view of partial structure of clutch in embodiment Figure 1 .

[0015] Figure 5 Schematic view of partial structure of clutch in embodiment Figure 2 .

[0016] Figure 6 Schematic view of structure of end cover in embodiment.

[0017] Figure 7 Schematic view of structure of push plate in embodiment.

[0018] Figure 8 Schematic view of structure of brake assembly in embodiment.

[0019] Figure 9 Schematic view of structure of brake pad assembly in embodiment.

[0020] Wherein:

[0021] 1. Elevator car.

[0022] 2. Guide rail.

[0023] 3. Roller.

[0024] 4. First fixed seat.

[0025] 5. First rotating shaft.

[0026] 6. Transmission assembly; 61, transmission wheel; 62, transmission belt.

[0027] 7. Clutch assembly; 71, second fixed seat; 72, second rotating shaft; 73, base; 731, guide groove; 7311, mounting groove; 74, end cover; 741, clamping block; 75, second elastic member; 76, clutch block; 761, clamping groove; 77, third elastic member; 78, limiting block; 781, inclined surface.

[0028] 8. Drive shaft; 81, screw rod.

[0029] 9. Push plate; 91, connecting rod; 92, threaded hole.

[0030] 10. Rotating seat; 101, strip-shaped hole.

[0031] 11. Guide rod.

[0032] 12. Brake lever.

[0033] 13. Brake pad assembly; 131, brake pad fixed seat; 132, elastic member; 133, brake pad. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0035] In the description of the present application, it should be understood that the orientations and positional relationships indicated by "up", "down", "left", "right", "front", "back", "vertical", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] As shown in Figures 1 to 9

[0037] An elevator anti-falling device, comprising: an elevator car 1, a guide rail 2, a roller 3, a first fixed seat 4, a first rotating shaft 5, a transmission assembly 6, a clutch assembly 7, a drive shaft 8, a push plate 9 and a brake assembly, the guide rail 2 is installed on one side of the elevator car 1, the first fixed seat 4 is fixed on the top of the elevator car 1, the first rotating shaft 5 is rotatably installed on the first fixed seat 4, the first rotating shaft 5 passes through the roller 3, and the roller 3 and the first rotating shaft 5 are fixedly connected, the roller 3 is matched in the guide rail 2 and rolls with the lifting of the elevator car 1; the clutch assembly 7 is installed on the elevator car 1, and the clutch assembly 7 is arranged on one side of the first rotating shaft 5, the transmission assembly 6 is connected between the clutch assembly 7 and the first rotating shaft 5, the drive shaft 8 is fixed on the output end of the clutch assembly 7, the push plate 9 is slidably installed on the elevator car 1, and the front end of the push plate 9 is threadedly connected with the rear end of the drive shaft 8; the brake assembly comprises a rotating seat 10, a guide rod 11, a brake lever 12 and a brake pad assembly 13, the middle part of the rotating seat 10 is sleeved on the guide rod 11, the left half of the rotating seat 10 is provided with a strip-shaped hole 101, the rear end of the push plate 9 is provided with a connecting rod 91, and the connecting rod 91 is matched in the strip-shaped hole 101; the brake pad assembly 13 is provided with two groups, the two groups of brake pad assemblies 13 are respectively fixed on the front side of the left end of the rotating seat 10 and the rear side of the right end of the rotating seat 10; the brake lever 12 is provided with two, the two brake levers 12 and the two brake pad assemblies 13 are correspondingly arranged, and the brake lever 12 is located on the movement track of the brake pad assembly 13.

[0038] ​In this way, when the steel wire rope is broken or the elevator falls for other reasons, the falling of the elevator car 1 will accelerate, thus the rotating speed of the roller 3 will increase, and the rotating speed of the first rotating shaft 5 will increase, and the rotating speed of the clutch assembly 7 will increase under the transmission of the transmission assembly 6, thus the clamping between the front and rear parts of the clutch assembly 7 is promoted, and then the driving shaft 8 is rotated, since the driving shaft 8 and the push plate 9 are threadedly connected, and the push plate 9 is slidingly installed on the elevator car 1, thus the rotation of the driving shaft 8 promotes the sliding of the push plate 9, the sliding of the push plate 9 promotes the rotation of the rotating seat 10, and the rotation of the rotating seat 10 promotes the braking of the brake pad assembly 13 supported on the brake lever 12, until the elevator car 1 stops falling. In this way, the whole braking process does not rely on the steel wire rope, and as long as the elevator car 1 falls, the falling speed of the elevator car 1 will increase, thus the brake assembly is gradually started until the elevator car stops falling.

[0039] In addition, as shown in Figure 9 The brake pad assembly 13 comprises a brake pad fixing seat 131, an elastic member 132 and a brake pad 133, the brake pad fixing seat 131 is fixed on the end of the rotating seat 10, the brake pad 133 is slidingly installed on the brake pad fixing seat 131, and the elastic member 132 is arranged between the brake pad 133 and the brake pad fixing seat 131, and the two ends of the elastic member 132 are connected with the brake pad 133 and the brake pad fixing seat 131 respectively. Specifically, in order to realize the lateral sliding of the brake pad 133, a guide rod is arranged on the brake pad 133, and guide holes are arranged on the brake pad fixing seat 131 and the rotating seat.

[0040] In this way, the brake pad 133 first contacts the brake lever 12, and as the rotating seat 10 continues to rotate, the brake pad 133 compresses the elastic member 132, and in this process, the pressure of the brake pad 133 on the brake lever 12 increases continuously, thus the brake pad 133 can gradually complete the braking, instead of braking the elevator car 1 in an instant, so as to avoid the injury of passengers in the elevator car 1.

[0041] In addition, the cross section of the brake lever 12 is circular, and the cross section of the brake pad 133 is semicircular.

[0042] In this way, the contact area between the brake pad 133 and the brake lever 12 can be increased, thus the braking effect is better.

[0043] In addition, as shown in Figure 2 — Figure 6As shown, the clutch assembly 7 comprises a second fixed seat 71, a second rotating shaft 72 and a clutch, the second fixed seat 71 is arranged on one side of the first fixed seat 4, the second fixed seat 71 is arranged in two, the clutch is arranged between the two second fixed seats 71, the second rotating shaft 72 and the driving shaft 8 are respectively fixed on the input end and the output end of the clutch, and the second rotating shaft 72 and the driving shaft 8 are respectively rotatably connected with the two second fixed seats 71; the transmission assembly 6 comprises a transmission wheel 61 and a transmission belt 62, the transmission wheel 61 is arranged in two, the two transmission wheels 61 are respectively fixed on the first rotating shaft 5 and the second rotating shaft 72, and the transmission belt 62 is matched on the two transmission wheels 61; the front end of the push plate 9 is provided with a threaded hole 92, and the rear end of the driving shaft 8 is provided with a screw rod 81, the screw rod 81 is matched in the threaded hole 92.

[0044] In this way, the rotation of the first rotating shaft 5 drives the rotation of one of the transmission wheels 61, and the transmission wheel 61 drives the rotation of the other transmission wheel 61 through the transmission belt 62, thereby driving the rotation of the second rotating shaft 72.

[0045] In addition, the clutch comprises a base 73, an end cover 74, a second elastic member 75, a clutch block 76 and a limiting assembly, the end cover 74 and the base 73 are rotatably connected, the second rotating shaft 72 and the base 73 are fixedly connected, the driving shaft 8 and the end cover 74 are fixedly connected, the base 73 is provided with a guide groove 731, the guide groove 731 is arranged in two, the clutch block 76 is arranged in two, the two clutch blocks 76 are respectively slidably matched in the guide groove 731, the second elastic member 75 is arranged between the two clutch blocks 76, and the two ends of the second elastic member 75 are respectively connected with the two clutch blocks 76; the inner wall of the end cover 74 is provided with a clamping block 741, the base 73 rotates faster, the clutch block 76 slides outward to one side of the clamping block 741, the clutch block 76 drives the rotation of the clamping block 741, and the clamping block 741 drives the rotation of the end cover 74; the limiting assembly is installed in the guide groove 731, and the limiting assembly is located on one side of the sliding direction of the clutch block 76, when the clutch block 76 slides outward, the limiting assembly fixes the clutch block 76.

[0046] In this way, when the elevator falls, the rotating speed of the second rotating shaft 72 increases, the second rotating shaft 72 drives the base 73 to rotate faster, so that the clutch block 76 slides radially under the action of centrifugal force, the clutch block 76 and the clamping block 741 in the end cover 74 are clamped to drive the rotation of the end cover 74, and the rotation of the end cover 74 drives the rotation of the driving shaft 8, at the same time, the limiting assembly can fix the clutch block 76 after sliding, so as to avoid that after the brake slows down, the rotating speed of the roller 3 decreases, the rotating speed of the second rotating shaft 72 decreases, the rotating speed of the base 73 decreases, and the centrifugal force of the clutch block 76 decreases to return to the original position.

[0047] In addition, the limiting assembly comprises a third elastic member 77 and a limiting block 78. The side surface of the clutch block 76 is provided with a clamping groove 761, the side surface of the guide groove 731 is provided with a mounting groove 7311, the third elastic member 77 is mounted in the mounting groove 7311, and the limiting block 78 is slidingly fitted in the mounting groove. The end surface of the limiting block 78 is provided with an inclined surface 781 which is abutted against the end surface of the clutch block 76 under the action of the third elastic member 77.

[0048] In this way, when the clutch block 76 is subjected to a larger centrifugal force, the clutch block 76 slides against the pressure given by the inclined surface 781. When the limiting block 78 and the clamping groove 761 are aligned, the limiting block 78 is clamped in the clamping groove 761 and is always clamped in the clamping groove 761 under the action of the third elastic member 77, thereby fixing the clutch block 76.

[0049] In summary, the above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An elevator anti-falling device, characterized by, The brake pad assembly comprises a brake pad fixing seat, an elastic member and a brake pad. The utility model provides an elevator car, guide rail, gyro wheel, first fixed seat, first pivot, transmission assembly, clutch assembly, drive shaft, push plate and brake assembly, the guide rail is installed in one side of elevator car, first fixed seat is fixed in the top of elevator car, first pivot is rotatably installed in first fixed seat, first pivot passes through gyro wheel, and gyro wheel and first pivot are fixedly connected, gyro wheel is matched in guide rail and rolls with the rise and fall of elevator car, clutch assembly is installed on elevator car, and clutch assembly is arranged at one side of first pivot at intervals, transmission assembly is connected between clutch assembly and first pivot, drive shaft is fixed in the output end of clutch assembly, push plate is slidably installed on elevator car, and the front end of push plate is threadedly connected with the rear end of drive shaft, brake assembly includes rotary seat, guide rod, brake lever and brake pad assembly, the middle part of rotary seat is sleeved on guide rod, the left half of rotary seat is provided with strip hole, the rear end of push plate is provided with connecting rod, and connecting rod is matched in strip hole, brake pad assembly is provided with two groups, two brake pad assemblies are fixed on the left end front side of rotary seat and the right end rear side of rotary seat respectively, brake lever is provided with two, two brake levers and two brake pad assemblies are arranged one by one, and brake lever is located on the motion track of brake pad assembly, clutch assembly includes second fixed seat, second pivot and clutch, second fixed seat is arranged at one side of first fixed seat at intervals, second fixed seat is arranged at intervals and is provided with two, clutch is arranged between two second fixed seats, second pivot and drive shaft are fixed on the input end and output end of clutch respectively, and second pivot and drive shaft are rotatably connected with two second fixed seats respectively, transmission assembly includes transmission wheel and transmission belt, transmission wheel is provided with two, two transmission wheels are fixed on first pivot and second pivot respectively, and transmission belt is matched on two transmission wheels, the front end of push plate is provided with screw hole, the rear end of drive shaft is provided with screw rod, and screw rod is matched in screw hole, clutch includes base, end cover, second elastic element, clutch block and limiting assembly, end cover and base are rotatably connected, second pivot and base are fixedly connected, drive shaft and end cover are fixedly connected, base is provided with guide groove, guide groove is provided with two at intervals, clutch block is provided with two, two clutch blocks are slidably matched in guide groove, second elastic element is arranged between two clutch blocks, and two ends of second elastic element are connected with two clutch blocks respectively, the inner wall of end cover is provided with clamping block, the rotation speed of base is accelerated, clutch block slides to one side of clamping block, clutch block drives clamping block to rotate, and clamping block drives end cover to rotate.The limiting assembly is installed in the guide groove, and is located at one side of the sliding direction of the clutch block. When the clutch block slides outward, the limiting assembly fixes the clutch block. The limiting assembly comprises a third elastic member and a limiting block. The side surface of the clutch block is provided with a clamping groove. The side surface of the guide groove is provided with a mounting groove. The third elastic member is installed in the mounting groove. The limiting block is slidingly fitted in the mounting groove. The end side of the limiting block is provided with an inclined surface. The inclined surface is abutted against the end of the clutch block under the action of the third elastic member.

2. Elevator anti-falling device according to claim 1, characterized in that The cross section of the brake lever is circular, and the cross section of the brake pad is semicircular.

3. Elevator anti-falling device according to claim 2, characterized in that ​

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