Speed reducer of elevator

Abstract

The utility model discloses a reduction gear of an elevator, which relates to the technical field of elevators and comprises a bottom plate, a frame and a winding drum, the frame is mounted on the bottom plate, the winding drum is mounted on the frame, reels at two ends of the winding drum are rotatably connected with the frame, one end of the winding drum is directly connected with an output shaft of a motor mounted on the outer wall of one side of the frame, and the other end of the winding drum is fixedly connected with the frame. According to the utility model, the reflective rotating speed sensor, the reflector, the speed reducer, the oil feeding pipe, the hydraulic oil cylinder, the rack, the electric telescopic rod, the controller and the speed reducing disc are matched with one another, so that the rotating speed of the winding drum can be monitored in real time; and when it is monitored that the winding drum stalls, the speed reducer is controlled by the controller to clamp the speed reduction disc so as to conduct speed reduction control on the winding drum till the winding drum recovers to the normal speed, in this way, speed reduction control over the elevator can be conducted after the linkage test of the speed limiter and the safety tongs fails, double speed reduction protection is provided for the elevator, and the safety of the elevator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a deceleration device for an elevator. Background Art

[0002] Elevators are an indispensable means of vertical transportation in modern buildings. Their safety is directly related to the life safety of passengers. In the design and manufacturing process of elevators, anti-fall protection devices are a vital link. According to the classification of GB7588-2003, the safety components of elevators include safety clamps, speed limiters, buffers, door lock devices, upward overspeed protection devices and safety circuits containing electronic components. Among them, speed limiters and safety clamps belong to overspeed protection safety devices. In the prior art, when the elevator exceeds the speed limit, the speed limiter will send a signal in time, and then produce a mechanical action to cut off the power supply circuit, and the speed limiter wire rope will pull the lifting rod to activate the safety clamp installed on the car frame, forcing the car to stop on the guide rail.

[0003] However, in actual use, the linkage test of the speed limiter and the safety clamp often fails due to (1) the wrong installation direction of the speed limiter; (2) insufficient friction between the speed limiter pressure block and the speed limiter wire rope; (3) the speed limiter set action speed does not match the rated speed of the elevator; (4) the speed limiter is not sensitive due to rust and dirt, and cannot trigger the mechanical action of the safety clamp; (6) the gap between the safety clamp wedge is too large; (7) the structural dimensions of the safety clamp lifting mechanism are incorrect, and the lifting rod stroke is insufficient; (8) the vertical pull rod of the safety clamp is too long, and when lifting, the pull rod presses against the elevator guide shoe, making it impossible for the pull rod to continue to pull up, and the wedge block cannot clamp the guide rail; (9) there are foreign objects such as sand, dust, and oil mud in the jaws of the safety clamp, the safety clamp wedge block cannot clamp the guide rail, and the car continues to slide downward, causing failure and other reasons, and cannot play the due protective role. Therefore, the existing elevator safety protection effect is not good enough, and the safety protection level needs to be further improved. Utility Model Content

[0004] The purpose of the utility model is to provide a deceleration device for an elevator to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A deceleration device for an elevator, comprising a bottom plate, a frame and a drum. The frame is installed on the bottom plate, and the drum is installed on the frame. The two ends of the drum are rotatably connected to the frame through the reel shafts. One end of the drum is directly connected to the output shaft of the motor installed on the outer wall of one side of the frame. Limit discs are installed at both ends of the drum. A reflector is installed on one of the limit discs on one side of the drum. The reflector is arranged opposite to the reflective rotational speed sensor installed on the frame. A deceleration disc is installed on the outer side surface of the limit disc at the other end of the drum. A speed reducer is arranged on the deceleration disc. The speed reducer is fixedly connected to the support leg installed on the frame. A fixed frame is installed on the bottom plate, and a hydraulic oil cylinder is installed on the fixed frame. An electric telescopic rod is arranged at the bottom of the hydraulic oil cylinder. The cylinder part of the electric telescopic rod is installed on the fixed frame, and the piston rod end of the electric telescopic rod is movably inserted into the hydraulic oil cylinder. The speed reducer includes a speed reducer housing, a bifurcated oil guiding channel, an oil cavity, a sealing disc, a connecting rod and a brake pad. A bifurcated oil guiding channel is arranged inside the speed reducer housing. The bifurcated oil guiding channel is connected to the oil cavities symmetrically opened at the bottom of the speed reducer housing. A sealing disc is installed in the oil cavity. The sealing disc is slidably sealed with the oil cavity. A connecting rod is installed on the side of the sealing disc facing the deceleration disc. The other end of the connecting rod is installed with a brake pad. The upper port of the bifurcated oil guiding channel is externally connected with an oil delivery pipe, and the other end of the oil delivery pipe is hermetically connected to the upper port of the hydraulic oil cylinder.

[0007] As a further scheme of the present utility model: The hydraulic oil cylinder includes a cylinder body, hydraulic oil and a piston. The cylinder body is provided with hydraulic oil. A piston is arranged below the hydraulic oil. The piston is fixedly connected to the piston rod end of the electric telescopic rod. The piston is slidably sealed with the cylinder body.

[0008] As a further scheme of the present utility model: Annular heat dissipation grooves are opened on both side surfaces of the deceleration disc. A plurality of linear heat dissipation grooves are annularly opened on both side surfaces of the deceleration disc. The linear heat dissipation grooves are arranged in a cross manner with the annular heat dissipation grooves.

[0009] As a further scheme of the present utility model: One end of the linear heat dissipation groove penetrates through the edge of the deceleration disc.

[0010] As a further scheme of the present utility model: A controller is installed on the bottom plate. The reflective rotational speed sensor is electrically connected to the controller, and the controller is electrically connected to the electric telescopic rod.

[0011] As a further scheme of the present utility model: An oil filling port is opened on the cylinder body, and a sealing cover is installed on the oil filling port.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] 1. The utility model realizes real-time monitoring of the reel speed by the mutual cooperation of a reflective speed sensor, a reflector, a speed reducer, an oil delivery pipe, a hydraulic oil cylinder, a frame, an electric telescopic rod, a controller and a speed reduction disc. When the reel stall is detected, the controller controls the speed reducer to clamp the speed reduction disc to decelerate the reel until the reel returns to the normal speed. In this way, the deceleration control of the elevator can be carried out after the linkage test of the speed limiter - safety gear fails, providing double deceleration protection for the elevator and improving the safety of the elevator.

[0014] 2. The utility model improves the heat dissipation efficiency of the brake pads and extends their service life by opening annular heat dissipation grooves and linear heat dissipation grooves on the surface of the speed reduction disc. The annular heat dissipation grooves and the linear heat dissipation grooves cooperate with each other to quickly conduct the heat generated by the sliding friction between the speed reduction disc and the brake pads to the surrounding air. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of a deceleration device for an elevator.

[0016] Figure 2 It is a deceleration device for an elevator Figure 1 The schematic diagram of the internal structure of the speed reducer in it.

[0017] Figure 3 It is a deceleration device for an elevator Figure 1 The schematic diagram of the structure of the speed reduction disc in it.

[0018] Figure 4 It is a deceleration device for an elevator Figure 1 The schematic diagram of the internal structure of the hydraulic oil cylinder in it.

[0019] 1. Bottom plate; 2. Frame; 3. Reel; 4. Motor; 5. Limit disc; 6. Reflector; 7. Reflective speed sensor; 8. Leg; 9. Speed reducer; 901. Speed reducer housing; 902. Forked oil guiding channel; 903. Oil cavity; 904. Sealing disc; 905. Connecting rod; 906. Brake pads; 10. Oil delivery pipe; 11. Hydraulic oil cylinder; 1101. Cylinder body; 1102. Piston; 1103. Hydraulic oil; 1104. Oil filling port; 12. Fixed frame; 13. Electric telescopic rod; 14. Controller; 15. Speed reduction disc; 16. Annular heat dissipation groove; 17. Linear heat dissipation groove. Detailed Embodiment

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figure 1 , in the embodiment of the present invention, a deceleration device for an elevator includes a bottom plate 1, a frame 2, and a drum 3. The frame 2 is installed on the bottom plate 1, and the drum 3 is installed on the frame 2. The two ends of the drum 3 are rotatably connected to the frame 2 through shafts. One end of the drum 3 is directly connected to the output shaft of a motor 4 installed on the outer wall of one side of the frame 2. Limit disks 5 are installed at both ends of the drum 3, and a reflector 6 is installed on one of the limit disks 5 on one side of the drum 3. The reflector 6 is disposed opposite to a reflection type rotational speed sensor 7 installed on the frame 2. A controller 14 is installed on the bottom plate 1. The reflection type rotational speed sensor 7 is electrically connected to the controller 14. The model of the controller 14 is S7-200, and the controller 14 is electrically connected to an electric telescopic rod 13. The model of the reflection type rotational speed sensor 7 is NCGD-3, which is an existing mature product, and its working principle will not be elaborated here.

[0022] Please refer to Figure 1 , Figure 2 and Figure 4, on the outer side of the limit disc 5 at the other end of the reel 3, a deceleration disc 15 is installed. A speed reducer 9 is provided on the deceleration disc 15. The speed reducer 9 is fixedly connected to the support leg 8 installed on the frame 2. A fixing frame 12 is installed on the bottom plate 1. A hydraulic oil cylinder 11 is installed on the fixing frame 12. An electric telescopic rod 13 is provided at the bottom of the hydraulic oil cylinder 11. The cylinder part of the electric telescopic rod 13 is installed on the fixing frame 12. The piston rod end of the electric telescopic rod 13 is movably inserted into the hydraulic oil cylinder 11. The speed reducer 9 includes a speed reducer housing 901, a bifurcated oil guiding channel 902, an oil cavity 903, a sealing disc 904, a connecting rod 905 and a brake pad 906. A bifurcated oil guiding channel 902 is arranged inside the speed reducer housing 901. The bifurcated oil guiding channel 902 is connected to the oil cavity 903 symmetrically opened at the bottom of the speed reducer housing 901. A sealing disc 904 is installed in the oil cavity 903. The sealing disc 904 is slidably sealed with the oil cavity 903. A connecting rod 905 is installed on the side of the sealing disc 904 facing the deceleration disc 15. A brake pad 906 is installed at the other end of the connecting rod 905. The brake pad 906 is detachably connected to the connecting rod 905. An oil delivery pipe 10 is externally connected to the upper port of the bifurcated oil guiding channel 902. The other end of the oil delivery pipe 10 is hermetically connected to the upper port of the hydraulic oil cylinder 11. The hydraulic oil cylinder 11 includes a cylinder body 1101, hydraulic oil 1103 and a piston 1102. The hydraulic oil 1103 is arranged inside the cylinder body 1101. A piston 1102 is arranged below the hydraulic oil 1103. The piston 1102 is fixedly connected to the piston rod end of the electric telescopic rod 13. The piston 1102 is slidably sealed with the cylinder body 1101. An oil filling port 1104 is opened on the cylinder body 1101. A sealing cover is installed on the oil filling port 1104.

[0023] Please refer to Figure 3 , annular heat dissipation grooves 16 are opened on both side surfaces of the deceleration disc 15. A plurality of linear heat dissipation grooves 17 are annularly opened on both side surfaces of the deceleration disc 15. The linear heat dissipation grooves 17 are arranged crosswise with the annular heat dissipation grooves 16. One end of the linear heat dissipation groove 17 penetrates through the edge of the deceleration disc 15. Such a design can enable heat to be discharged outward along the linear heat dissipation grooves 17.

[0024] The working principle of the present utility model is:

[0025] During use, when the reflective rotational speed sensor 7 monitors that the rotational speed of the reel 3 is too fast and exceeds the normal range preset by the controller 14, the controller 14 will activate the electric telescopic rod 13. The electric telescopic rod 13 extends and drives the piston 1102 to move upward in the cylinder body 1101, thereby squeezing the hydraulic oil 1103 in the cylinder body 1101 out of the cylinder body 1101. The hydraulic oil 1103 is transported to the reducer 9 through the oil delivery pipe 10. The hydraulic oil 1103 enters the bifurcated oil guiding channel 902 in the reducer 9 and enters the two oil cavities 903 through the bifurcated oil guiding channel 902. Thus, the thrust of the electric telescopic rod 13 is transmitted to the sealing disc 904 through the hydraulic oil 1103. The sealing disc 904 slides with the inner wall of the oil cavity 903 and pushes the brake pads 906 to move towards the deceleration disc 15 through the connecting rod 905. Thus, the deceleration disc 15 is clamped by the two brake pads 906, enabling the reel 3 to decelerate. When the reflective rotational speed sensor 7 monitors that the rotational speed of the reel 3 is within the normal range preset by the controller 14, the electric telescopic rod 13 contracts, causing the reducer 9 to separate from the deceleration disc 15.

[0026] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A deceleration device for an elevator, comprising a base plate (1), a frame (2) and a drum (3), characterized in that: A frame (2) is mounted on the bottom plate (1), a reel (3) is mounted on the frame (2), reels at both ends of the reel (3) are rotatably connected to the frame (2), one end of the reel (3) is directly connected to an output shaft of a motor (4) mounted on an outer wall of one side of the frame (2), limit plates (5) are mounted on both ends of the reel (3), a reflector (6) is mounted on the limit plate (5) on one side of the reel (3), and the reflector (6) is connected to a corresponding reflective speed sensor (7) mounted on the frame (2). The reel (3) is arranged relative to each other, a reduction disc (15) is installed on the outer side of the limit disc (5) at the other end, a reducer (9) is arranged on the reduction disc (15), and the reducer (9) is fixedly connected to a leg (8) installed on the frame (2), a fixing frame (12) is installed on the bottom plate (1), a hydraulic oil cylinder (11) is installed on the fixing frame (12), an electric telescopic rod (13) is arranged at the bottom of the hydraulic oil cylinder (11), and the cylinder body of the electric telescopic rod (13) is installed on the fixing frame (12). The reducer (9) comprises a reducer housing (901), a bifurcated oil guide channel (902), an oil chamber (903), a sealing plate (904), a connecting rod (905) and a brake pad (906). The reducer housing (901) is provided with a bifurcated oil guide channel (902) inside. The bifurcated oil guide channel (902) is symmetrically provided with an oil channel at the bottom of the reducer housing (901). The oil chamber (903) is connected with a sealing disk (904), and the sealing disk (904) is slidably sealed with the oil chamber (903). A connecting rod (905) is installed on the side of the sealing disk (904) facing the reduction plate (15), and a brake pad (906) is installed on the other end of the connecting rod (905). The upper end of the forked oil guide channel (902) is externally connected to an oil delivery pipe (10), and the other end of the oil delivery pipe (10) is sealed and connected to the upper end of the hydraulic oil cylinder (11).

2. The deceleration device of an elevator according to claim 1, characterized in that: The hydraulic oil cylinder (11) comprises a cylinder body (1101), hydraulic oil (1103) and a piston (1102); the hydraulic oil (1103) is arranged in the cylinder body (1101); a piston (1102) is arranged below the hydraulic oil (1103); the piston (1102) is fixedly connected to the piston rod end of the electric telescopic rod (13); and the piston (1102) is slidably and sealingly connected to the cylinder body (1101).

3. The deceleration device of an elevator according to claim 1, characterized in that: Annular heat dissipation grooves (16) are provided on both sides of the deceleration disc (15), and a plurality of linear heat dissipation grooves (17) are provided in an annular shape on both sides of the deceleration disc (15), wherein the linear heat dissipation grooves (17) and the annular heat dissipation grooves (16) are arranged crosswise.

4. The deceleration device of an elevator according to claim 3, characterized in that: One end of the linear heat dissipation groove (17) passes through the edge of the speed reduction plate (15).

5. The deceleration device of an elevator according to claim 1, characterized in that: A controller (14) is installed on the base plate (1).

6. The deceleration device of an elevator according to claim 2, characterized in that: The cylinder (1101) is provided with an oil filling port (1104), and a sealing cover is installed on the oil filling port (1104).

Images