External speed measuring device for elevator tail

Abstract

The utility model relates to the technical field of speed measuring devices, in particular to an external speed measuring device for the tail of an elevator, which comprises a shaft end baffle detachably mounted at the shaft end of a rotating shaft of the elevator, and further comprises a bearing seat end cover mounted at the outer end of the shaft end baffle, and a sensor bracket arranged on the outer side cover surface of the bearing seat end cover and used for mounting a speed measuring sensor; the double-end stud is fixedly installed at the axis of the shaft end baffle and penetrates through the axis of the bearing seat end cover in an inserted mode; the measuring claw disc is mounted on the double-end stud; the elevator tail external speed measuring device is convenient to overhaul, disassemble and assemble, the damage risk to the sensor in the installation process can be reduced, meanwhile, the elevator does not need to be disassembled, the maintenance time is shortened, and the maintenance cost is reduced; according to the device, the speed measuring position of the rotating shaft of the elevator can be transferred to the outside through the arranged double-end stud and the measuring claw disc, the installation visibility is improved, the influence of the internal temperature and lubricating oil on the speed measuring sensor is avoided, and good speed measuring precision can be kept.

Description

Technical Field

[0001] This utility model relates to the field of speed measuring device technology, specifically to an external speed measuring device at the tail of a hoist. Background Technology

[0002] Speed ​​measurement at the tail end of the hoist is crucial for ensuring safe operation. It can provide alarms for tail end stalling, deviation, or jamming. Currently, the commonly used tail end speed measurement typically employs a structure where a speed measuring switch is installed at one end of the hoist tail shaft, and the probe is mounted on the bearing end cover, integrated into the bearing housing assembly. A sensing bolt is installed on the shaft end baffle. When the head of the sensing bolt passes through the switching zone of the activated speed measuring switch, it sends a pulse signal to the speed measuring switch, thus reflecting the hoist's operating speed.

[0003] However, in actual use, the bearing housing operates under a lubricated oil-immersed state. Using clean oil for lubrication results in poor sealing, allowing material from the tail end to easily enter the bearing housing, which can easily lead to frequent sensor malfunctions. If grease is used for lubrication, it will affect the accuracy of the speed sensor. In addition, the sensor requires specific sensing area and sensing distance. When the sensor is installed inside the bearing housing, the distance between the sensor and the sensing point cannot be observed or measured, resulting in poor visibility and inconvenience in installation. If the installation distance is too far, the sensor will be insensitive; if the installation position is too close, the sensor may be hit during use, causing sensor failure. This makes installation and maintenance inconvenient.

[0004] Therefore, in order to avoid the above problems, we consider designing a speed measuring device that is not located inside the hoist, so as to facilitate installation and maintenance and maintain good speed measuring accuracy. In view of this, we propose an external speed measuring device at the tail of the hoist. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings mentioned in the background art and provide an external speed measuring device at the tail of a hoist.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An external speed measuring device at the tail of a hoist includes a shaft end baffle detachably mounted on the end of the hoist's rotating shaft, and further includes:

[0008] A bearing housing end cover is installed at the outer end of the shaft end baffle, and a sensor bracket for mounting a speed sensor is provided on the outer cover surface of the bearing housing end cover.

[0009] A double-ended stud is fixedly installed at the center of the shaft end baffle and inserted through the center of the bearing seat end cover.

[0010] The measuring claw disc is mounted on the double-ended stud.

[0011] Preferably, the bearing housing end cover has a central hole at its shaft center for inserting the double-ended stud, and an encapsulation slot is provided inside the central hole;

[0012] An oil seal is installed inside the encapsulation slot to prevent dust from entering.

[0013] Preferably, the bearing housing end cover is provided with a bracket hole for detachably installing the sensor bracket, and the distance from the sensor bracket to the center hole is greater than the radius of the measuring claw disk.

[0014] Preferably, the measuring claw disk includes a shaft disk with multiple L-shaped claws connected around its perimeter, and the shaft disk is provided with a first mounting hole for mounting on the double-ended stud.

[0015] Preferably, the L-shaped claw is aligned with the sensing path of the speed sensor;

[0016] When the measuring claw rotates, the L-shaped claw is used to trigger the speed sensor to obtain a sensing signal.

[0017] Preferably, the measuring claw disc is inserted into the double-ended stud, and fastening nuts are installed on the double-ended stud at both sides of the shaft disc.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The external speed measuring device at the tail of the hoist facilitates inspection, disassembly and assembly, reduces the risk of damage to the sensor during installation, and eliminates the need to disassemble the hoist, thus shortening maintenance time and costs.

[0020] 2. This device, through its double-headed studs and measuring claw discs, can transfer the speed measuring position of the hoist's rotating shaft to the outside, improving installation visibility and avoiding the influence of internal temperature and lubricating oil on the speed sensor, thus helping to maintain good speed measuring accuracy. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 This is a schematic cross-sectional view of the overall structure and installation relationship of this utility model;

[0023] Figure 2 This is a side view of the overall structure of this utility model;

[0024] Figure 3 These are three views of the measuring claw disc of this utility model;

[0025] Figure 4 This is a schematic diagram of the bearing housing end cover of this utility model;

[0026] Figure 5 This is a cross-sectional view of the bearing housing end cover of this utility model;

[0027] Figure 6 This is a schematic diagram of the shaft end baffle of this utility model.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Measuring jaw disk; 11. Shaft disk; 12. L-shaped jaw disk; 101. First mounting hole; 2. Double-ended stud; 3. Sensor bracket; 4. Oil seal; 5. Bearing seat end cover; 501. Center hole; 502. Encapsulation slot hole; 503. Inner cavity; 504. Disassembly and assembly hole; 505. Bracket hole;

[0030] 6. Shaft end plate; 601. Threaded hole; 602. Second mounting hole; 7. Fixing bolt; 8. Fastening nut. Detailed Implementation

[0031] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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] Please see Figure 1-6 The present invention will describe the above technical solution in detail through the following embodiments:

[0033] In this embodiment, the external speed measuring device at the tail of the hoist primarily obtains the speed by testing the rotational speed of the hoist's rotating shaft. In this embodiment, for example... Figure 1 The structure shown has a shaft end baffle 6 installed at the end of the hoist's rotating shaft, wherein, as shown... Figure 6 The structure shown has a second mounting hole 602 at the center of the shaft end baffle 6, and can be detachably installed on the shaft end of the hoist rotating shaft by installing a fixing bolt 7 in the threaded hole 601.

[0034] A bearing housing end cover 5 is detachably installed on the hoist and at the outer end of the shaft end baffle 6. This is to provide space for the installation of the fixing bolts 7. Figure 5 The structure shown has an inner cavity 503 inside the bearing housing end cover 5, and also has a mounting hole 504 for installing screws.

[0035] Specifically, to avoid the influence of dust or material debris, it is necessary to maintain airtightness. Therefore, a central hole 501 is provided at the center of the bearing housing end cover 5, and an oil seal 4 is installed in the encapsulation slot 502 located inside the central hole 501. In this embodiment, the double-ended stud 2 is inserted through the central hole 501, and one end is fixedly installed in the threaded hole 601. When the hoist rotating shaft rotates, the double-ended stud 2 can be driven to rotate synchronously through the shaft end baffle 6, thereby obtaining a transmission structure for external speed measurement. The measuring claw plate 1 is detachably and fixedly installed at the outer end of the double-ended stud 2 by a fastening nut 8.

[0036] like Figures 1-4 The structure shown has a bracket hole 505 on the bearing seat end cover 5, and a sensor bracket 3 is installed at the bracket hole 505. In this embodiment, the distance from the sensor bracket 3 to the center hole 501 needs to be greater than the radius of the measuring claw disk 1, so that when the measuring claw disk 1 rotates, it will not conflict with the sensor bracket 3. A speed sensor is installed on the sensor bracket 3.

[0037] This implementation example Figure 3 The structure shown includes a measuring claw disk 1 with four L-shaped claws 12 connected around its perimeter. The L-shaped claws 12 are aligned with the sensing path of the speed sensor, which can trigger the speed sensor to obtain four sensing signals when rotating once. That is, the hoist's tail shaft senses four times for every rotation, and the hoisting speed is measured.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model.

Claims

1. An external speed measuring device at the tail of a hoist, comprising a shaft end baffle (6) detachably mounted on the shaft end of the hoist's rotating shaft, characterized in that: Also includes: The bearing seat end cover (5) is installed at the outer end of the shaft end baffle (6), and a sensor bracket (3) for installing a speed sensor is provided on the outer cover surface of the bearing seat end cover (5); A double-headed stud (2) is fixedly installed at the center of the shaft end baffle (6) and inserted through the center of the bearing seat end cover (5); The measuring claw plate (1) is mounted on the double-headed stud (2).

2. The external speed measuring device at the tail of the hoist as described in claim 1, characterized in that: The bearing seat end cap (5) has a central hole (501) at the shaft center for inserting the double-headed stud (2), and a sealing slot (502) is provided inside the central hole (501); An oil seal (4) for preventing dust from entering is installed inside the encapsulation slot (502).

3. The external speed measuring device at the tail of the hoist as described in claim 2, characterized in that: The bearing seat end cover (5) is provided with a bracket hole (505) for detachably installing the sensor bracket (3), and the distance from the sensor bracket (3) to the center hole (501) is greater than the radius of the measuring claw disk (1).

4. The external speed measuring device at the tail of the hoist as described in claim 3, characterized in that: The measuring claw disk (1) includes a shaft disk (11) with multiple L-shaped claws (12) connected around its perimeter. The shaft disk (11) is provided with a first mounting hole (101) for mounting on the double-headed stud (2).

5. The external speed measuring device at the tail of the hoist as described in claim 4, characterized in that: The L-shaped claw (12) is aligned with the sensing path of the speed sensor; When the measuring claw disk (1) rotates, the L-shaped claw (12) is used to trigger the speed sensor to obtain a sensing signal.

6. The external speed measuring device at the tail of the hoist as described in claim 5, characterized in that: The measuring claw disc (1) is inserted into the double-ended stud (2), and fastening nuts (8) are installed on the double-ended stud (2) on both sides of the shaft disc (11).

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