An elevator governor speed monitoring device

Abstract

The utility model discloses an elevator speed limiter speed monitoring device, include: clamping mechanism, the clamping mechanism includes U type board, the U type board clamps the installation support of speed limiter, speed measuring mechanism includes pivot, friction wheel and tachometric sensor, the coaxial fixed in the middle part of pivot of friction wheel, the tachometric sensor is installed in the end of pivot, both ends of pivot rotatable connection has the sliding block, the sliding block with the U type board sliding connection is equipped with compression spring between the sliding block with the U type board to make the compression spring will friction wheel press against the speed limiter's speed wheel, the utility model discloses the clamping mechanism can be clamped in the speed limiter of elevator of this device through the setting, through the setting speed measuring mechanism can realize the speed of speed wheel when monitoring when the elevator runs, thereby monitoring the speed of elevator car up and down, and the monitoring of the speed of elevator car up and down provides more redundancy.

Description

Technical Field

[0001] This utility model belongs to the field of elevator technology, specifically an elevator speed limiter speed monitoring device. Background Technology

[0002] The elevator speed governor is one of the safety control components in the elevator safety protection system. Its working principle is as follows: when the elevator is in operation, and for any reason the car exceeds its speed, or even poses a danger of falling, and all other safety protection devices fail, the speed governor and safety brakes will activate in conjunction, stopping the elevator car. The elevator speed governor is a safety protection device for the elevator. It constantly monitors and controls the car's speed. When an overspeed situation occurs, i.e., 115% of the elevator's rated speed, it can promptly send a signal, which will then trigger a mechanical action to cut off the power supply circuit, causing the traction mechanism to brake.

[0003] Existing elevator speed governors generally include a speed governor wheel and a mounting bracket for installing the speed governor wheel. The elevator car is connected to the speed governor wheel via steel wire ropes. Elevator speed governors generally monitor the car speed by monitoring the rotational speed of the speed governor wheel.

[0004] Although the elevator speed governor can monitor the car speed at any time, it lacks redundancy. If the components of the elevator speed governor used to monitor the car speed malfunction, it may not be able to monitor the car speed in a timely manner. Utility Model Content

[0005] The purpose of this invention is to provide an elevator speed governor speed monitoring device to solve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An elevator speed governor speed monitoring device includes:

[0008] A clamping mechanism, comprising a U-shaped plate, wherein the U-shaped plate clamps the mounting bracket of the speed limiter; the clamping mechanism is used to clamp the speed limiter, so that the device can be fixedly connected to the speed limiter. Specifically, the U-shaped plate clamps the mounting bracket of the speed limiter from both sides to install the device onto the speed limiter.

[0009] The speed measuring mechanism includes a rotating shaft, a friction wheel, and a speed sensor. The friction wheel is coaxially fixed to the middle of the rotating shaft, and the speed sensor is installed at the end of the rotating shaft to detect the rotational speed of the rotating shaft. Slider blocks are rotatably connected to both ends of the rotating shaft. The sliders are slidably connected to a U-shaped plate, and a compression spring is provided between the sliders and the U-shaped plate. The sliding direction of the sliders is consistent with the length direction of the compression spring, so that the compression spring presses the friction wheel against the speed limiting wheel of the speed limiter. The axial direction of the friction wheel is parallel to the axial direction of the speed limiting wheel.

[0010] This invention uses a clamping mechanism to attach the device to the elevator's speed limiter, and a speed measuring mechanism to monitor the rotational speed of the speed limiter wheel during elevator operation, thereby monitoring the elevator car's vertical speed and providing more redundancy for monitoring the elevator car's vertical speed.

[0011] This invention uses a rotating shaft, a friction wheel, and a speed sensor to monitor the rotational speed of the speed limiting wheel. The friction wheel is in contact with the speed limiting wheel of the speed limiter. When the speed limiting wheel rotates, it drives the friction wheel to rotate through friction. The friction wheel drives the rotating shaft to rotate. The speed sensor is used to monitor the rotational speed of the rotating shaft, thereby monitoring the rotational speed of the speed limiting wheel. The speed sensor directly monitors the rotational speed of the rotating shaft, and the rotational speed of the rotating shaft is the same as the rotational speed of the friction wheel. The rotational speed of the speed limiting wheel can be calculated from the rotational speed of the friction wheel.

[0012] This invention uses a compression spring to press the friction wheel against the speed limiting wheel, allowing the friction wheel to fit tightly against the speed limiting wheel, which is beneficial for the speed limiting wheel to drive the friction wheel to rotate.

[0013] Furthermore, the U-shaped plate includes two side plates and one horizontal plate. The two side plates are fixedly connected to both ends of the horizontal plate. The two side plates are arranged parallel to each other and perpendicular to the horizontal plate. The rotating shaft is arranged parallel to the horizontal plate, and the two side plates are respectively inserted through both ends of the rotating shaft. The two side plates and the horizontal plate are connected to form a U-shaped plate.

[0014] Furthermore, the rotating shaft passes through the slider and is rotatably connected to the rotating shaft via a bearing. The rotating shaft is fixedly connected to the inner ring of the bearing, and the slider is fixedly connected to the outer ring of the bearing. The rotating shaft and the rotating shaft are rotatably connected through the bearing, and the slider is restricted from sliding along the length direction of the rotating shaft.

[0015] Furthermore, a through groove is provided on the side plate, and the slider is located in the corresponding groove and slidably connected to the groove, so that the slider is slidably connected to the U-shaped plate. The shape of the slider matches the shape of the groove so that the slider can slide along the length of the groove without rotating between the slider and the groove. The slider can be a cube slider or a cuboid slider, and the two opposite sides of the slider are in contact with the opposite side walls of the groove, and the two can slide relative to each other.

[0016] Furthermore, both ends of the slider are provided with limiting blocks, which contact the corresponding side plates. The side plates are located between the two corresponding limiting blocks. The limiting blocks restrict the movement direction of the slider, so that the slider can only slide along the length direction of the groove.

[0017] Furthermore, a mounting plate is provided on the limiting block located between the two side plates. The mounting plate is arranged parallel to the horizontal plate. A mounting rod is provided on the side of the mounting plate near the horizontal plate. The mounting rod passes through the horizontal plate and is slidably connected to the horizontal plate. A compression spring is sleeved on the mounting rod. One end of the compression spring abuts against the mounting plate, and the other end abuts against the horizontal plate. The mounting plate and mounting rod are used to install the compression spring, so that the compression spring can press against the slider through the mounting plate, and drive the friction wheel through the slider, thereby realizing the use of the compression spring to press the friction wheel against the speed limiting wheel.

[0018] Furthermore, both side plates are provided with screw holes, and screws are threaded into the screw holes. The screws abut against the mounting bracket of the speed limiter, so that the U-shaped plate clamps the mounting bracket of the speed limiter. The device is installed on the speed limiter by the screws pressing against the mounting bracket from opposite sides.

[0019] Furthermore, a clamping block is provided at one end of the screw near the mounting bracket of the speed limiter. The clamping block abuts against the mounting bracket of the speed limiter. By providing a clamping block between the screw and the mounting bracket of the speed limiter, the contact area between the clamping mechanism and the mounting bracket of the speed limiter can be increased, the friction between the clamping mechanism and the mounting bracket of the speed limiter can be improved, and the clamping mechanism can be more firmly connected to the mounting bracket.

[0020] Furthermore, a gasket is provided at one end of the clamping block near the mounting bracket of the speed limiter. The gasket abuts against the mounting bracket of the speed limiter and is used to protect the mounting bracket.

[0021] Furthermore, the clamping block is rotatably connected to the screw, and the friction between the washer and the mounting bracket is relatively large. By rotatably connecting the screw to the clamping block, the clamping block and the mounting bracket do not rotate when the screw is rotated, making it easier to rotate the screw.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] (1) The present invention can clamp the device onto the speed limiter of the elevator through the clamping mechanism and monitor the speed limiter wheel speed during elevator operation through the speed measuring mechanism, thereby monitoring the speed of the elevator car going up and down, and providing more redundancy for monitoring the speed of the elevator car going up and down.

[0024] (2) This utility model uses a rotating shaft, a friction wheel, and a speed sensor to monitor the speed of the speed limiting wheel. The friction wheel is in contact with the speed limiting wheel of the speed limiter. When the speed limiting wheel rotates, it drives the friction wheel to rotate through friction. The friction wheel drives the rotating shaft to rotate. The speed sensor is used to monitor the speed of the rotating shaft, thereby monitoring the speed of the speed limiting wheel. The speed directly monitored by the speed sensor is the speed of the rotating shaft, and the speed of the rotating shaft is the same as the speed of the friction wheel. The speed of the speed limiting wheel can be calculated from the speed of the friction wheel.

[0025] (3) The present invention uses a compression spring to press the friction wheel against the speed limiting wheel, so that the friction wheel can be in close contact with the speed limiting wheel, which is beneficial for the speed limiting wheel to drive the friction wheel to rotate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an elevator speed limiter speed monitoring device in this embodiment;

[0027] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0028] Figure 3 for Figure 1 Enlarged view of a section at point B in the middle;

[0029] Figure 4 This is a cross-sectional view of the slider in this embodiment;

[0030] In the diagram: 1. Mounting bracket; 2. Speed ​​limiting wheel; 3. Shaft; 4. Friction wheel; 5. Speed ​​sensor; 6. Slider; 7. Compression spring; 8. Side plate; 9. Horizontal plate; 10. Slide groove; 11. Limiting block; 12. Mounting plate; 13. Mounting rod; 14. Screw; 15. Clamping block; 16. Washer; 17. Handle; 18. Bearing. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] like Figure 1-4 As shown, this embodiment provides an elevator speed governor speed monitoring device, including:

[0033] The clamping mechanism includes a U-shaped plate that clamps the mounting bracket 1 of the speed limiter. The clamping mechanism is used to clamp the speed limiter so that the device can be fixedly connected to the speed limiter. Specifically, the U-shaped plate clamps the mounting bracket 1 of the speed limiter from both sides to install the device onto the speed limiter.

[0034] The speed measuring mechanism includes a rotating shaft 3, a friction wheel 4, and a speed sensor 5. The friction wheel 4 is coaxially fixed to the middle of the rotating shaft 3. The speed sensor 5 is installed at the end of the rotating shaft 3 to detect the rotation speed of the rotating shaft 3. Both ends of the rotating shaft 3 are rotatably connected to sliders 6. The sliders 6 are slidably connected to the U-shaped plate. A compression spring 7 is provided between the sliders 6 and the U-shaped plate. The sliding direction of the sliders 6 is consistent with the length direction of the compression spring 7, so that the compression spring 7 presses the friction wheel 4 against the speed limiting wheel 2 of the speed limiter. The axial direction of the friction wheel 4 is parallel to the axial direction of the speed limiting wheel 2.

[0035] This invention uses a clamping mechanism to attach the device to the speed limiter of an elevator, and a speed measuring mechanism to monitor the rotational speed of the speed limiter wheel 2 during elevator operation, thereby monitoring the speed of the elevator car going up and down, providing more redundancy for monitoring the speed of the elevator car going up and down.

[0036] This invention uses a rotating shaft 3, a friction wheel 4, and a speed sensor 5 to monitor the rotational speed of the speed limiting wheel 2. The friction wheel 4 is in contact with the speed limiting wheel 2 of the speed limiter. When the speed limiting wheel 2 rotates, it drives the friction wheel 4 to rotate through friction. The friction wheel 4 drives the rotating shaft 3 to rotate. The speed sensor 5 is used to monitor the rotational speed of the rotating shaft 3, thereby monitoring the rotational speed of the speed limiting wheel 2. The speed sensor 5 directly monitors the rotational speed of the rotating shaft 3, and the rotational speed of the rotating shaft 3 is the same as the rotational speed of the friction wheel 4. The rotational speed of the speed limiting wheel 2 can be calculated from the rotational speed of the friction wheel 4.

[0037] This invention uses a compression spring 7 to press the friction wheel 4 against the speed limiting wheel 2, so that the friction wheel 4 can be tightly attached to the speed limiting wheel 2, which is beneficial for the speed limiting wheel 2 to drive the friction wheel 4 to rotate.

[0038] In this embodiment, the speed sensor 5 can be a rotary encoder, for example, an Omron incremental rotary encoder E6B2-CWZ6C, used to measure the speed of the speed limiter wheel 2. It is equipped with reverse connection and load short-circuit protection circuits, improving reliability. A rotary encoder, also known as a resolver, is a signal element whose output voltage changes with the rotor angle. When the excitation winding is energized with an AC voltage of a certain frequency, the voltage amplitude of the output winding has a sine and cosine function relationship with the rotor angle, or maintains a certain proportional relationship, or has a linear relationship with the angle within a certain angle range. Rotary encoders have high IP values ​​and can operate under relatively harsh environmental conditions.

[0039] In this embodiment, since the speed limiter wheel 2 has a wire rope for connecting with the car, in order to avoid the wire rope interfering with the contact between the friction wheel 4 and the speed limiter wheel 2, a groove matching the wire rope can be opened on the friction wheel 4 to avoid the wire rope; since the speed limiter wheel 2 is provided with annular grooves for accommodating the wire rope, if the wire rope does not protrude from the annular groove on the speed limiter wheel 2, then there is no need to open a groove on the friction wheel 4 to avoid the wire rope.

[0040] Furthermore, the U-shaped plate includes two side plates 8 and one horizontal plate 9. The two side plates 8 are fixedly connected to both ends of the horizontal plate 9, and the two side plates 8 are arranged parallel to each other. The side plates 8 are arranged perpendicular to the horizontal plate 9, and the rotating shaft 3 is arranged parallel to the horizontal plate 9. The two ends of the rotating shaft 3 are respectively threaded through the two side plates 8. The two side plates 8 and the horizontal plate 9 are connected to form a U-shaped plate. In this embodiment, the side plates 8 and the horizontal plate 9 can be fixedly connected by welding.

[0041] Furthermore, the rotating shaft 3 passes through the slider 6, and the slider 6 is rotatably connected to the rotating shaft 3 through the bearing 18. The rotating shaft 3 is fixedly connected to the inner ring of the bearing 18, and the slider 6 is fixedly connected to the outer ring of the bearing 18. The rotating connection between the slider 6 and the rotating shaft 3 is realized through the bearing 18, and the slider 6 is restricted from sliding along the length direction of the rotating shaft 3.

[0042] Furthermore, a through groove 10 is provided on the side plate 8, and the slider 6 is located in the corresponding groove 10 and is slidably connected to the groove 10, so that the slider 6 is slidably connected to the U-shaped plate. The shape of the slider 6 matches the shape of the groove 10 so that the slider 6 can slide along the length of the groove 10 within the groove 10, and the slider 6 and the groove 10 do not rotate. The slider 6 can be a cube slider 6 or a cuboid slider 6. The two opposite sides of the slider 6 are in contact with the opposite side walls of the groove 10, and the two can slide relative to each other.

[0043] Furthermore, each end of the slider 6 is provided with a limiting block 11, which contacts the corresponding side plate 8. The side plate 8 is located between the two corresponding limiting blocks 11. The limiting blocks 11 restrict the movement direction of the slider 6, so that the slider 6 can only slide along the length direction of the slide groove 10. Since the side of the limiting block 11 close to the side plate 8 is parallel to the side, the limiting blocks 11 can also keep the rotating shaft 3 perpendicular to the side plate 8. In this embodiment, in order to avoid the limiting blocks 11 interfering with the rotation of the rotating shaft 3, a through hole is provided on the limiting blocks 11 to accommodate the rotating shaft 3, and the limiting blocks 11 do not contact the rotating shaft 3. In this embodiment, the rotary encoder can be installed on the limiting blocks 11. The limiting blocks 11 will not rotate. The shaft of the rotary encoder is connected to the rotating shaft 3, and the rotating shaft 3 drives the shaft of the rotary encoder to rotate. In this embodiment, the shaft of the rotary encoder can also be connected to the rotating shaft 3 through a coupling to protect the rotary encoder.

[0044] Furthermore, a mounting plate 12 is provided on the limiting block 11 located between the two side plates 8. The mounting plate 12 is arranged parallel to the horizontal plate 9. A mounting rod 13 is provided on the side of the mounting plate 12 near the horizontal plate 9. The mounting rod 13 passes through the horizontal plate 9 and is slidably connected to the horizontal plate 9. A compression spring 7 is sleeved on the mounting rod 13. One end of the compression spring 7 abuts against the mounting plate 12, and the other end abuts against the horizontal plate 9. The mounting plate 12 and the mounting rod 13 are used to install the compression spring 7, so that the compression spring 7 can press against the slider 6 through the mounting plate 12, and drive the friction wheel 4 through the slider 6, thereby realizing the use of the compression spring 7 to press the friction wheel 4 against the speed limiting wheel 2. In this embodiment, the length direction of the slide groove 10, the length direction of the side plate 8, and the length direction of the mounting rod 13 can be consistent.

[0045] In this embodiment, in order to prevent interference between the rotating shaft 3 and the compression spring 7, the mounting plate 12 can be fixed to the side of the limiting block 11 near the horizontal plate 9.

[0046] Furthermore, both side plates 8 are provided with screw holes, and screws 14 are threaded into the screw holes. The screws 14 abut against the mounting bracket 1 of the speed limiter, so that the U-shaped plate clamps the mounting bracket 1 of the speed limiter. The screws 14 are provided to abut against the mounting bracket 1 from opposite sides of the mounting bracket 1 of the speed limiter, thereby installing the device onto the speed limiter.

[0047] Furthermore, a clamping block 15 is provided at one end of the screw 14 near the mounting bracket 1 of the speed limiter. The clamping block 15 abuts against the mounting bracket 1 of the speed limiter. By providing the clamping block 15 between the screw 14 and the mounting bracket 1 of the speed limiter, the contact area between the clamping mechanism and the mounting bracket 1 of the speed limiter can be increased, the friction between the clamping mechanism and the mounting bracket 1 of the speed limiter can be improved, and the clamping mechanism can be more firmly connected to the mounting bracket 1.

[0048] Furthermore, a gasket 16 is provided at one end of the clamping block 15 near the mounting bracket 1 of the speed limiter. The gasket 16 abuts against the mounting bracket 1 of the speed limiter. The gasket 16 is used to protect the mounting bracket 1. In this embodiment, the gasket 16 can be a rubber gasket 16 to provide better protection for the mounting bracket 1 and to increase the friction between the clamping block 15 and the mounting bracket 1.

[0049] Furthermore, the clamping block 15 is rotatably connected to the screw 14, and the friction between the washer 16 and the mounting bracket 1 is relatively large. By rotatably connecting the screw 14 and the clamping block 15, the clamping block 15 and the mounting bracket 1 do not rotate when the screw 14 is rotated, making it easier to rotate the screw 14.

[0050] In this embodiment, in order to make it easier to rotate the screw 14, a handle 17 can be provided at the end of the screw 14 away from the clamping block 15. By holding the handle 17, the screw 14 can be turned more easily.

[0051] It should be noted that although the present invention has been disclosed above with specific embodiments, the above embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A speed monitoring device for an elevator speed governor, characterized in that, include: A clamping mechanism, comprising a U-shaped plate, wherein the U-shaped plate clamps the mounting bracket of the speed limiter; The speed measuring mechanism includes a rotating shaft, a friction wheel, and a speed sensor. The friction wheel is coaxially fixed to the middle of the rotating shaft, and the speed sensor is installed at the end of the rotating shaft to detect the rotational speed of the rotating shaft. Slider blocks are rotatably connected to both ends of the rotating shaft. The sliders are slidably connected to a U-shaped plate, and a compression spring is provided between the sliders and the U-shaped plate. The sliding direction of the sliders is consistent with the length direction of the compression spring, so that the compression spring presses the friction wheel against the speed limiting wheel of the speed limiter. The axial direction of the friction wheel is parallel to the axial direction of the speed limiting wheel.

2. The elevator speed governor speed monitoring device as described in claim 1, characterized in that, The U-shaped plate includes two side plates and one horizontal plate. The two side plates are fixedly connected to both ends of the horizontal plate. The two side plates are arranged parallel to each other and perpendicular to the horizontal plate. The rotating shaft is arranged parallel to the horizontal plate, and the two side plates pass through both ends of the rotating shaft.

3. The elevator speed governor speed monitoring device as described in claim 2, characterized in that, The rotating shaft passes through the slider, and the slider is rotatably connected to the rotating shaft via a bearing.

4. The elevator speed governor speed monitoring device as described in claim 3, characterized in that, A through groove is provided on the side plate, and the slider is located in the corresponding groove and is slidably connected to the groove so that the slider is slidably connected to the U-shaped plate.

5. The elevator speed governor speed monitoring device as described in claim 3, characterized in that, Both ends of the slider are provided with limiting blocks, and the limiting blocks are in contact with the corresponding side plates.

6. The elevator speed governor speed monitoring device as described in claim 5, characterized in that, A mounting plate is provided on the limiting block located between the two side plates. The mounting plate is arranged parallel to the horizontal plate. A mounting rod is provided on the side of the mounting plate near the horizontal plate. The mounting rod passes through the horizontal plate and is slidably connected to the horizontal plate. A compression spring is sleeved on the mounting rod. One end of the compression spring abuts against the mounting plate, and the other end abuts against the horizontal plate.

7. The elevator speed governor speed monitoring device as described in claim 2, characterized in that, Both side plates are provided with screw holes, and screw rods are threaded into the screw holes. The screw rods abut against the mounting bracket of the speed limiter so that the U-shaped plate clamps the mounting bracket of the speed limiter.

8. The elevator speed governor speed monitoring device as described in claim 7, characterized in that, The screw has a clamping block at one end near the mounting bracket of the speed limiter, and the clamping block abuts against the mounting bracket of the speed limiter.

9. The elevator speed governor speed monitoring device as described in claim 8, characterized in that, The clamping block has a gasket at one end near the mounting bracket of the speed limiter, and the gasket abuts against the mounting bracket of the speed limiter.

10. The elevator speed governor speed monitoring device as described in claim 8, characterized in that, The clamping block is rotatably connected to the screw.

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