A weight limiter

Abstract

The invention discloses a weight limiter, comprising a ring body, wherein one side of the inner wall of the ring body is connected to one side of a fixed bottom plate, at least two groups of PCB boards are arranged on the other side of the fixed bottom plate, one side of a magnet fixing frame having the same number as the PCB boards is arranged on the other side of the fixed bottom plate, and the other side of the magnet fixing frame is connected to the other side of the fixed bottom plate; each of the PCB boards and the adjacent magnet fixing frames are respectively provided with a displacement sensing chip and a displacement sensing magnet in opposite positions at the fixed bottom plate, and a solution of multiple groups of sensors is adopted to judge whether the value of the weight limiter is correct. Therefore, when one of the sensors fails, the weight limiter can still judge whether there is an error in itself, so as to ensure the normal and reliable operation of the weight limiter.

Description

Technical Field

[0001] The invention relates to the technical field of lifting, and in particular to a weight limiter. Background Art

[0002] At present, the weight limiter is used as a safety protection device for lifting machinery, and is used for electric hoist single-beam and double-beam cranes of various models and specifications; it plays a role in preventing equipment and personal accidents caused by overloading of lifting equipment, and is extremely important for the modern safety production of industries such as metallurgy, machinery, mining, railways, docks, warehouses, etc. If the sensor of the weight limiter of the prior art collects the weight of the current equipment as A, then the weight limiter only has one set of signals. Once the sensor fails, the weight limiter cannot determine whether it has an error. Summary of the invention

[0003] The object of the present invention is to provide a weight limiter to overcome the defects of the prior art weight limiter, in which if the sensor detects that the weight of the current device is A, the weight limiter has only one set of signals. Once the sensor fails, the weight limiter cannot determine whether it has an error defect.

[0004] The weight limiter of the present invention comprises a ring body, one side of the inner wall of the ring body is connected to one side of a fixed base plate, at least two groups of PCB boards are arranged on the other side of the fixed base plate, one side of a magnet fixing frame corresponding to the number of the PCB boards is arranged on the other side of the fixed base plate, and the other side of the magnet fixing frame is connected to the other side of the fixed base plate; each of the PCB boards and the adjacent magnet fixing frames are respectively provided with a displacement sensing chip and a displacement sensing magnet in opposite positions at the fixed base plate.

[0005] In the above scheme, preferably, two groups of PCB boards including a first group of PCB boards and a second group of PCB boards are arranged on the other side of the fixed base plate, one side of the first group of magnet fixing frames and the second group of magnet fixing frames are arranged on the fixed base plate between the first group of PCB boards and the second group of PCB boards, and the other side of the first group of magnet fixing frames and the second group of magnet fixing frames are connected to the other side of the inner wall of the ring body; the first group of PCB boards and the first group of magnet fixing frames are respectively provided with a first group of displacement sensing chips and a first group of displacement sensing magnets in relative positions at the fixed base plate, and the second group of PCB boards and the second group of magnet fixing frames are respectively provided with a second group of displacement sensing chips and a second group of displacement sensing magnets in relative positions at the fixed base plate.

[0006] It may also be preferred that the first group of PCB boards and the second group of PCB boards are arranged on the top surface of the other side of the fixed base plate, the third group of PCB boards are arranged on the bottom surface of the other side of the fixed base plate, one side of the third group of magnet fixing frames is arranged on the fixed base plate, and the other side of the third group of magnet fixing frames is connected to the other side of the inner wall of the ring body; the third group of PCB boards and the third group of magnet fixing frames are respectively provided with a third group of displacement sensing chips and a third group of displacement sensing magnets which are relatively positioned at the fixed base plate.

[0007] It may also be preferred that an ear plate is connected to the outer wall of the ring body, and a mounting hole is provided on the ear plate.

[0008] It may also be preferred that the number of the ear plates is two, and the two ear plates are symmetrically distributed and connected to the outer wall of the ring body.

[0009] It may also be preferred that the ear plate is a semicircular plate.

[0010] It may also be preferred that the first group of PCB boards and the second group of PCB boards are parallel, and the first group of magnet fixing frames and the second group of magnet fixing frames are parallel.

[0011] It may also be preferred that the first group of PCB boards and the first group of magnet fixing frames are parallel.

[0012] It may also be preferred that the third group of PCB boards is directly below the second group of PCB boards.

[0013] It may also be preferred that the third group of magnet fixing frames is directly below the second group of magnet fixing frames.

[0014] The present invention has the following advantages:

[0015] The weight limiter of the present invention overcomes the defects of the weight limiter of the prior art. If the sensor of the weight limiter detects that the weight of the current device is A, the weight limiter has only one set of signals. Once the sensor fails, the weight limiter cannot determine whether there is an error in itself. The weight limiter adopts a solution of multiple sets of sensors to determine whether the value of the weight limiter is correct. When one of the sensors fails, the weight limiter can still determine whether there is an error in itself, so as to ensure the normal and reliable operation of the weight limiter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the weight limiter of the present invention.

[0017] Figure 2 It is a downward view of the weight limiter of the present invention.

[0018] Figure 3 It is a front view of the weight limiter of the present invention.

[0019] Figure 4 It is a side view of the weight limiter of the present invention.

[0020] In the figure, 1 is the first group of displacement sensing chips, 2 is the first group of PCB boards, 3 is the first group of magnet fixing frames, 4 is the first group of displacement sensing magnets, 5 is the second group of displacement sensing magnets, 6 is the second group of displacement sensing chips, 7 is the second group of PCB boards, 8 is the second group of magnet fixing frames, 9 is the fixed bottom plate, 10 is the ring body, 11 is the third group of magnet fixing frames, 12 is the third group of displacement sensing magnets, 13 is the third group of displacement sensing chips, and 14 is the third group of PCB boards. DETAILED DESCRIPTION

[0021] The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0022] Example 1

[0023] A weight limiter, such as Figures 1 to 4 , including a ring body 10, one side of the inner wall of the ring body 10 is connected to one side of a fixed base plate 9, at least two groups of PCB boards are arranged on the other side of the fixed base plate 9, one side of a magnet fixing frame corresponding to the number of the PCB boards is arranged on the other side of the fixed base plate 9, and the other side of the magnet fixing frame is connected to the other side of the fixed base plate 9; each of the PCB boards and the adjacent magnet fixing frames are respectively provided with a displacement sensing chip and a displacement sensing magnet in relative positions at the fixed base plate 9.

[0024] Example 2

[0025] A weight limiter, similar to embodiment 1, except that Figure 1 , two groups of PCB boards including a first group of PCB boards 2 and a second group of PCB boards 7 are arranged on the other side of the fixed base plate 9, one side of the first group of magnet fixing frames 3 and the second group of magnet fixing frames 8 are arranged on the fixed base plate 9 between the first group of PCB boards 2 and the second group of PCB boards 7, and the other sides of the first group of magnet fixing frames 3 and the second group of magnet fixing frames 8 are connected to the other side of the inner wall of the ring body 10; the first group of PCB boards 2 and the first group of magnet fixing frames 3 are respectively provided with a first group of displacement sensing chips 1 and a first group of displacement sensing magnets 4 in relative positions at the fixed base plate 9, and the second group of PCB boards 7 and the second group of magnet fixing frames 8 are respectively provided with a second group of displacement sensing chips 6 and a second group of displacement sensing magnets 5 in relative positions at the fixed base plate 9.

[0026] Example 3

[0027] A weight limiter, similar to embodiment 2, except that Figure 2The first group of PCB boards 2 and the second group of PCB boards 7 are arranged on the top surface of the other side of the fixed base plate 9, and the third group of PCB boards 14 are arranged on the bottom surface of the other side of the fixed base plate 9. One side of the third group of magnet fixing frame 11 is arranged on the fixed base plate 9, and the other side of the third group of magnet fixing frame 11 is connected to the other side of the inner wall of the ring body 10; the third group of PCB boards 14 and the third group of magnet fixing frame 11 are respectively provided with a third group of displacement sensing chips 13 and a third group of displacement sensing magnets 12 in relative positions at the fixed base plate 9.

[0028] Example 4

[0029] A weight limiter is similar to the third embodiment, except that an ear plate is connected to the outer wall of the ring body 10, and a mounting hole is provided on the ear plate. The mounting hole is a circular hole. There are two ear plates, and the two ear plates are symmetrically connected to the outer wall of the ring body 10. The ear plate is a semicircular plate. The first group of PCB boards 2 is parallel to the second group of PCB boards 7, and the first group of magnet fixing frames 3 is parallel to the second group of magnet fixing frames 8. The first group of PCB boards 2 is parallel to the first group of magnet fixing frames 3. The third group of PCB boards 14 is directly below the second group of PCB boards 7, and the third group of PCB boards 14 is parallel to the second group of PCB boards 7. The third group of magnet fixing frames 11 is directly below the second group of magnet fixing frames 8. The third group of magnet fixing frames 11 is parallel to the second group of magnet fixing frames 8. The ring body 10 is a circular ring. The fixed plate body 9 is a rectangular plate. The central axis of the fixed plate body 9 is perpendicular to the tangent of the intersection with the ring body 10. Each PCB board is a rectangular plate. Each magnet fixing frame 3 is a rectangular plate. The central axis of each magnet fixing frame 3 is perpendicular to the tangent line at the intersection with the ring body 10 .

[0030] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A weight limiter, comprising a ring body (10), characterized in that: One side of the inner wall of the ring body (10) is connected to one side of the fixed bottom plate (9); at least two groups of PCB boards are arranged on the other side of the fixed bottom plate (9); one side of a magnet fixing frame having the same number as the PCB boards is arranged on the other side of the fixed bottom plate (9); the other side of the magnet fixing frame is connected to the other side of the inner wall of the ring body (10); each of the PCB boards and the adjacent magnet fixing frame are respectively provided with a displacement sensing chip and a displacement sensing magnet in opposite positions at the fixed bottom plate (9); two groups of PCB boards, including a first group of PCB boards (2) and a second group of PCB boards (7), are arranged on the other side of the fixed bottom plate (9); the first group of PCB boards (2) and the second group of PCB boards (7) are provided. One side of the magnet fixing frame (3) and the second group of magnet fixing frames (8) are arranged on a fixed base plate (9) between the first group of PCB boards (2) and the second group of PCB boards (7), and the other side of the first group of magnet fixing frames (3) and the second group of magnet fixing frames (8) are connected to the other side of the inner wall of the ring body (10); the first group of PCB boards (2) and the first group of magnet fixing frames (3) are respectively provided with a first group of displacement sensing chips (1) and a first group of displacement sensing magnets (4) in relative positions at the fixed base plate (9), and the second group of PCB boards (7) and the second group of magnet fixing frames (8) are respectively provided with a second group of displacement sensing chips (1) and a first group of displacement sensing magnets (4) in relative positions at the fixed base plate (9). The first group of PCB boards (2) and the second group of PCB boards (7) are arranged on the top surface of the other side of the fixed bottom plate (9); the third group of PCB boards (14) are arranged on the bottom surface of the other side of the fixed bottom plate (9); one side of the third group of magnet fixing frame (11) is arranged on the fixed bottom plate (9); the other side of the third group of magnet fixing frame (11) is connected to the other side of the inner wall of the ring body (10); the third group of PCB boards (14) and the third group of magnet fixing frame (11) are respectively provided with a third group of displacement sensing chips (13) and a third group of displacement sensing magnets (12) in opposite positions at the fixed bottom plate (9); The first group of PCB boards (2) and the second group of PCB boards (7) are parallel, and the first group of magnet fixing frames (3) and the second group of magnet fixing frames (8) are parallel; the first group of PCB boards (2) and the first group of magnet fixing frames (3) are parallel; the third group of PCB boards (14) is directly below the second group of PCB boards (7); the third group of magnet fixing frames (11) is directly below the second group of magnet fixing frames (8); the third group of magnet fixing frames (11) and the second group of magnet fixing frames (8) are parallel, the central axis of the fixed bottom plate (9) is perpendicular to the tangent at the intersection of the fixed bottom plate (9) and the ring body (10), and the central axis of each magnet fixing frame is perpendicular to the tangent at the intersection of the fixed bottom plate (9) and the ring body (10).

2. The weight limiter according to claim 1, characterized in that An ear plate is connected to the outer wall of the ring body (10), and a mounting hole is provided on the ear plate.

3. The weight limiter according to claim 2, characterized in that The number of the ear plates is two, and the two ear plates are symmetrically distributed and connected to the outer wall of the ring body (10).

4. The weight limiter according to claim 2, characterized in that The ear plate is a semicircular plate.

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