Elevator governor pitch circle diameter measuring device

Abstract

The utility model discloses a kind of pitch circle diameter measuring devices of elevator speed governor, belong to elevator speed governor technical field.This kind of pitch circle diameter measuring device of elevator speed governor includes rack and steel wire rope wheel, steel wire rope wheel is rotatably installed on the surface of rack, steel wire rope is wound on the surface of steel wire rope wheel, rack surface is equipped with measuring mechanism, for measuring pitch circle diameter, measuring mechanism includes scale, mounting seat and rotating seat, scale is arranged in the side wall of steel wire rope wheel, for measuring the length l of circular arc AB and the included angle θ between two indicating rods.The utility model is adjusted to the position of two abutting rods by setting measuring mechanism, rotating two rotating seats, by rotating locking bolt, under the action of thread groove, drive locking bolt to extrude two rotating seats, so as to position two indicating rods, then the length l of circular arc AB and the included angle θ between two indicating rods can be read by scale, convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of elevator speed governor technology, and in particular to a device for measuring the pitch circle diameter of an elevator speed governor. Background Technology

[0002] With the rapid development of building technology, elevators have become an essential piece of equipment in high-rise buildings. The safety of elevators in high-rise buildings is becoming increasingly important. The elevator speed governor is one of the important components for the safety protection of elevator operation. It is responsible for monitoring the operating speed of the elevator. According to the requirements of TSG T7007-2016 "Elevator Type Test Rules", the speed governor plays a very critical role as an elevator safety protection device. According to the requirements of elevator supervision and inspection and periodic inspection rules, the operation speed verification of the elevator speed governor is a mandatory inspection item. Among them, the pitch circle diameter of the speed governor is an important parameter for the operation speed verification.

[0003] For a long time, scholars at home and abroad have conducted a lot of research on diameter measurement, but no ideal method or instrument has emerged in the field of diameter measurement. In particular, the diameter test of elevator speed governors has not been well solved, which brings great workload and safety hazards to on-site measurement personnel. Utility Model Content

[0004] The purpose of this invention is to provide a device for measuring the pitch circle diameter of an elevator speed governor, so as to solve the problems existing in the background art.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An elevator speed governor pitch circle diameter measuring device includes a frame and a wire rope pulley. The wire rope pulley is rotatably mounted on the surface of the frame, and a wire rope is wound around the surface of the wire rope pulley. A measuring mechanism is mounted on the surface of the frame for measuring the pitch circle diameter. The measuring mechanism includes:

[0007] A scale, wherein the scale is disposed on the side wall of the wire rope pulley;

[0008] Mounting base, the mounting base is fixedly mounted on the side wall of the frame, and a sleeve shaft is fixedly mounted on the surface of the mounting base;

[0009] A rotating seat is rotatably sleeved on the surface of a sleeve shaft, and an indicator rod is fixedly installed on the surface of the rotating seat.

[0010] Preferably, there are two rotating seats, and an abutment rod is fixedly installed on the side wall of the indicator rod.

[0011] Preferably, an abutment wheel is rotatably mounted on one end of the abutment rod, and the abutment wheel contacts the inner wall of the wire rope wheel.

[0012] Preferably, the sleeve shaft surface has a threaded groove.

[0013] Preferably, the threaded groove surface is threaded with a locking bolt for locking the rotating seat.

[0014] Preferably, a rotation sensor is installed on the side wall of the frame to measure the number of rotations of the wire rope wheel.

[0015] The beneficial effects of this utility model are:

[0016] 1) By setting up a measuring mechanism, rotating the two rotating seats, the positions of the two abutment rods are adjusted. By rotating the locking bolt, the locking bolt is driven to press the two rotating seats under the action of the thread groove, thereby positioning the two indicator rods. Then, the length l of the arc AB and the included angle θ between the two indicator rods can be read by the scale, which is convenient to use. Attached Figure Description

[0017] Figure 1 A frontal perspective view provided for an embodiment of this utility model;

[0018] Figure 2 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 A side perspective view provided for an embodiment of this utility model;

[0020] Figure 4 A perspective view of the indicator rod provided for an embodiment of this utility model;

[0021] Figure 5 A diagram showing the geometric relationship between the wire rope wheel and the wire rope provided for embodiments of this utility model.

[0022] In the diagram, 1 is the frame; 2 is the wire rope pulley; 3 is the wire rope; 4 is the measuring mechanism; 401 is the scale; 402 is the mounting base; 403 is the sleeve shaft; 404 is the rotating base; 405 is the indicator rod; 406 is the abutment rod; 407 is the abutment wheel; 408 is the threaded groove; 409 is the locking bolt; and 410 is the rotation sensor. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] See Figures 1-4 This utility model provides a technical solution:

[0025] like Figures 1-4 As shown, an elevator speed governor pitch circle diameter measuring device includes a frame 1 and a wire rope wheel 2. The wire rope wheel 2 is rotatably mounted on the surface of the frame 1, and a wire rope 3 is wound on the surface of the wire rope wheel 2. A measuring mechanism 4 is installed on the surface of the frame 1 for measuring the pitch circle diameter. The measuring mechanism 4 includes a scale 401, a mounting base 402, and a rotating base 404. The scale 401 is set on the side wall of the wire rope wheel 2 and is used to measure the length l of the arc AB and the included angle θ between two indicator rods 405. The mounting base 402 is fixedly mounted on the side wall of the frame 1, and a sleeve shaft 403 is fixedly mounted on the surface of the mounting base 402. The rotating base 404 is rotatably sleeved on the surface of the sleeve shaft 403. Indicator rods 405 are fixedly mounted on the surface of the rotating base 404. There are two rotating bases 404. An abutment rod 406 is fixedly mounted on the side wall of the indicator rod 405. An abutment wheel 407 is rotatably mounted on one end of the abutment rod 406 and contacts the inner wall of the wire rope wheel 2.

[0026] like Figures 1-4 As shown, the sleeve shaft 403 has a threaded groove 408 on its surface, and a locking bolt 409 is threadedly connected to the surface of the threaded groove 408 for locking the rotating seat 404. By rotating the locking bolt 409, the locking bolt 409 is driven to press the two rotating seats 404 under the action of the threaded groove 408, thereby positioning the two indicator rods 405. A rotation sensor 410 is installed on the side wall of the frame 1 for measuring the number of rotations of the wire rope wheel 2.

[0027] With the above technical solution, when in use, the two rotating seats 404 are rotated to adjust the position of the two abutting rods 406. By rotating the locking bolt 409, under the action of the threaded groove 408, the locking bolt 409 is driven to press the two rotating seats 404, thereby positioning the two indicator rods 405. Then, the length l of the arc AB and the included angle θ between the two indicator rods 405 can be read by the scale 401, which is convenient to use.

[0028] like Figures 1-4 As shown, further, considering the specific structure of the connection between the wire rope pulley 2 and the wire rope 3, assuming that the wire rope 3 does not slip when the wire rope pulley 2 rotates, the length of the wire rope 3 can be indirectly determined by measuring the half-circumference L or circumference C of the wire rope pulley 2. The specific testing and calculation principle is as follows:

[0029] From the formula for the length of the corresponding arc AB on the circumference, we know that...

[0030] l = R * θ;

[0031] In the formula, l is the length of the arc AB, R is the radius of the wire rope wheel 2, and θ is the angle between the two indicator rods 405.

[0032] Therefore, the circumference C or half-circumference L of the wire rope pulley 2 is:

[0033] C = π * D = 2π * R or L = π * R;

[0034] In the formula, C is the circumference of the wire rope wheel 2, D is the diameter of the wire rope wheel 2, R is the radius of the wire rope wheel 2, and L is the half circumference.

[0035] Therefore, the diameter of the circle is:

[0036] D= Or D= ,

[0037] In the formula, D is the diameter of wire rope wheel 2, C is the circumference of wire rope wheel 2, and L is the half circumference.

[0038] Therefore, a mark can be made at the wire rope wheel 2, and the length of the wire rope 3 can be measured after 3-5 rotations of the wheel. The diameter D of the wire rope wheel 2 can then be calculated using the formula. Several sets of measurements can be taken to obtain the average value. Since this measurement method directly measures the circumference C of the wire rope wheel 2, the accuracy is reliable. However, the error is directly related to whether the wire rope wheel 2 and the wire rope 3 slip. The error is consistent with the accuracy error of straight line measurement. To eliminate the error, multiple cycles without slippage can be appropriately selected. The test result is to verify and detect the number of wheel rotations n and the corresponding wire rope 3 length C1. When designing the test instrument, the number of rotations n of the wire rope wheel 2 can be monitored and the corresponding wire rope 3 length calibrated. The rotation sensor 410 and length measurement verification and detection are feasible, and it is feasible to accurately test the pitch circle diameter of the elevator speed governor.

[0039] Preferably, during use, the two rotating seats 404 are rotated to adjust the position of the two abutting rods 406. By rotating the locking bolt 409, the locking bolt 409 is driven to press the two rotating seats 404 under the action of the threaded groove 408, thereby positioning the two indicator rods 405. Then, the length l of the arc AB and the included angle θ between the two indicator rods 405 can be read by the scale 401, which is convenient to use.

[0040] Preferably, during use, a mark can be made at the wire rope wheel 2. The length of the wire rope 3 after 3-5 rotations of the measuring wheel can be obtained by calculating the diameter D of the wire rope wheel 2 according to the formula. Several sets of measurements can be taken and the average value can be calculated. Since this measurement method directly measures the circumference C of the wire rope wheel 2, the accuracy is reliable. The error is directly related to whether the wire rope wheel 2 and the wire rope 3 slip, and it is consistent with the accuracy error of the straight line measurement. To eliminate the error, multiple cycles without slippage can be appropriately selected. The test result is to check and detect the number of rotations n of the wheel and the length C1 of the wire rope 3 corresponding to the number of wheel rotations. In the design of the test instrument, the number of rotations n of the wire rope wheel 2 and the corresponding length of the wire rope 3 can be monitored. The rotation sensor 410 and the length measurement inspection and detection are feasible, and it is feasible to accurately test the pitch circle diameter of the elevator speed governor.

[0041] The above are merely preferred embodiments of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A device for measuring the pitch circle diameter of an elevator speed governor, comprising a frame (1) and a wire rope wheel (2), wherein the wire rope wheel (2) is rotatably mounted on the surface of the frame (1), and a wire rope (3) is wound around the surface of the wire rope wheel (2), characterized in that, A measuring mechanism (4) is mounted on the surface of the frame (1) for measuring the pitch circle diameter. The measuring mechanism (4) includes: A scale (401) is provided on the side wall of the wire rope wheel (2); Mounting base (402), the mounting base (402) is fixedly installed on the side wall of the frame (1), and a sleeve shaft (403) is fixedly installed on the surface of the mounting base (402). A rotating seat (404) is rotatably sleeved on the surface of a sleeve shaft (403), and an indicator rod (405) is fixedly installed on the surface of the rotating seat (404).

2. The elevator speed governor pitch circle diameter measuring device according to claim 1, characterized in that: Two rotating seats (404) are provided, and an abutment rod (406) is fixedly installed on the side wall of the indicator rod (405).

3. The elevator speed governor pitch circle diameter measuring device according to claim 2, characterized in that: One end of the abutment rod (406) is rotatably mounted with an abutment wheel (407), which contacts the inner wall of the wire rope wheel (2).

4. The elevator speed governor pitch circle diameter measuring device according to claim 3, characterized in that: The sleeve shaft (403) has a threaded groove (408) on its surface.

5. The elevator speed governor pitch circle diameter measuring device according to claim 4, characterized in that: The threaded groove (408) is threaded with a locking bolt (409) for locking the rotating seat (404).

6. The elevator speed governor pitch circle diameter measuring device according to claim 5, characterized in that: A rotation sensor (410) is installed on the side wall of the frame (1) to measure the number of rotations of the wire rope wheel (2).

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