Bearing block type pressure sensor and fixed pulley type hoisting moment limiter

Abstract

This application relates to a bearing-mounted pressure sensor and a pulley-type lifting torque limiter in the field of crane technology. The sensor includes a bearing housing body with bearing holes and strain gauge mounting holes. The strain gauge mounting holes are arranged in a set, symmetrically at the bottom of the bearing holes. Pressure plates capable of applying pressure to the strain gauge mounting holes are respectively provided on both sides of the bearing holes. By adding pressure plates to the original structure, the bearing-mounted pressure sensor and pulley-type lifting torque limiter can improve the measurement accuracy and significantly extend the service life of the entire bearing housing, thereby ensuring the measurement accuracy and lifespan of the pulley-type lifting torque limiter.

Description

Technical Field

[0001] This application relates to the field of crane technology, and in particular to a bearing seat type pressure sensor and a fixed pulley type lifting torque limiter equipped with the bearing seat type pressure sensor. Background Technology

[0002] In crane lifting systems, bearing-mounted pressure sensors are installed at both ends of the load-bearing shaft to measure its load capacity. The weight of the load is sensed by the stress deformation of the strain gauges and their mounting holes.

[0003] In existing technologies, bearing housing weight sensors, such as those disclosed in CN201637468U, and bearing housing pressure sensors, such as those disclosed in CN202693168U, are commonly used. However, these bearing housing pressure sensors have a simple structure, and after prolonged use, the bearing housing may deform, affecting the testing accuracy. Utility Model Content

[0004] The purpose of this application is to provide a bearing-mounted pressure sensor with simple structure, high testing accuracy, and long service life, and a fixed pulley type lifting torque limiter with the bearing-mounted pressure sensor installed.

[0005] To achieve the above objectives, this utility model provides a bearing seat type pressure sensor, including a bearing seat body. The bearing seat body has a bearing hole and a strain gauge mounting hole. The strain gauge mounting holes are a set and symmetrically arranged at the bottom end of the bearing hole. Pressure plates capable of applying pressure to the strain gauge mounting holes are respectively provided on both sides of the bearing hole.

[0006] The pressure plate includes an integrally formed top section, middle extension section and bottom section. The top section is fixed to the middle position outside the bearing hole and extends away from the bearing hole. The top end of the middle extension section is connected to the top section and the bottom end extends downward. One end of the bottom section is connected to the bottom end of the middle extension section, and the other end of the bottom section extends towards the bearing hole and is fixed to the outside of the bearing hole.

[0007] To facilitate processing and forming, the pressure plate and the bearing housing body are integrally formed.

[0008] Preferably, one end of the top section extends to the inner wall of the bearing hole, and the other end extends horizontally outward.

[0009] Corresponding to the top segment, the middle extension segment extends vertically downwards.

[0010] Corresponding to the middle extension, the bottom section extends horizontally toward the bearing hole.

[0011] This utility model also provides a fixed pulley type lifting torque limiter, including a pulley frame, a pulley block, a hanging plate and a measuring shaft. The pulley block is installed on the measuring shaft through the hanging plate, and the two ends of the measuring shaft are respectively installed on the pulley frame through the aforementioned bearing seat type pressure sensors.

[0012] In summary, this utility model has the following beneficial effects: by adding a pressure plate to the original structure, the bearing seat pressure sensor and the fixed pulley type lifting torque limiter can improve the measurement accuracy and greatly extend the service life of the entire bearing seat, thereby ensuring the measurement accuracy and service life of the fixed pulley type lifting torque limiter. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the bearing seat type pressure sensor of this utility model;

[0014] Figure 2 This is a front view of the fixed pulley type lifting torque limiter of this utility model;

[0015] Figure 3 This is a side view of the fixed pulley type lifting torque limiter of this utility model. Detailed Implementation

[0016] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0017] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Example 1

[0019] like Figure 1 The bearing seat type pressure sensor shown includes a bearing seat body 1. The bearing seat body 1 has a bearing hole 2 at its center for mounting a load-bearing shaft and its bearing. The bearing seat body 1 has a set of strain gauge mounting holes 3 at its bottom end. The strain gauge mounting holes 3 are symmetrically arranged below the bearing hole 2. Strain gauges are installed in the strain gauge mounting holes 3. The bearing seat body 1 has a cable outlet 4 connected to the strain gauge on one side.

[0020] In addition, pressure plates capable of applying pressure to strain gauge mounting holes 3 are respectively provided on both sides of the bearing hole 2. The pressure plates are integrally formed with the bearing housing body 1. Specifically, the pressure plates include an integrally formed top section 5, a middle extension section 6, and a bottom section 7. The top section 5 is fixed at the middle position of the outer side (left and right sides) of the bearing hole 2 and extends horizontally away from the bearing hole 2. That is, one end of the top section 5 is flush with the inner wall of the bearing hole 2, and the other end extends horizontally to the outside of the bearing hole 2. The top end of the middle extension section 6 is connected to the top section 5, and the bottom end extends vertically downward, and the extension length does not exceed the radius of the bearing hole 2. One end of the bottom section 7 is connected to the bottom end of the middle extension section 6, and the other end of the bottom section 7 extends horizontally towards the bearing hole 2 and is fixed to the outer side of the bearing hole 2. The other end of the bottom section 7 does not need to be flush with the inner wall of the bearing hole 2.

[0021] This bearing-mounted pressure sensor improves measurement accuracy and significantly extends the service life of the entire bearing housing by changing the original method of applying force directly to the bearing hole via the measuring shaft to the bearing hole, with the force then transmitted to the strain gauge mounting hole via the pressure plate.

[0022] Example 2

[0023] This utility model also provides a fixed pulley type lifting torque limiter, combined with Figure 2 , Figure 3 As shown, the device includes a pulley frame 8, a pulley block 9, a hanging plate 10, and a measuring shaft 11. The pulley block 9 is mounted on the measuring shaft 11 via the hanging plate 10. Both ends of the measuring shaft 10 are mounted on the pulley frame 8 via the aforementioned bearing seat type pressure sensors 12. The measuring shaft 10 applies force to the bearing holes of the bearing seat type pressure sensors, which is transmitted to the strain gauge mounting holes by the pressure plate, thereby realizing the load measurement of the measuring shaft 11 and ensuring measurement accuracy.

[0024] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, principle and application direction of this application should be covered within the scope of protection of this application.

Claims

1. A bearing-mounted pressure sensor, comprising a bearing housing body, wherein the bearing housing body has bearing holes and strain gauge mounting holes, the strain gauge mounting holes being a set symmetrically arranged at the bottom end of the bearing holes, characterized in that: Pressure plates capable of applying pressure to the strain gauge mounting holes are respectively provided on both sides of the bearing hole; The pressure plate includes an integrally formed top section, middle extension section and bottom section. The top section is fixed to the middle position outside the bearing hole and extends away from the bearing hole. The top end of the middle extension section is connected to the top section and the bottom end extends downward. One end of the bottom section is connected to the bottom end of the middle extension section, and the other end of the bottom section extends towards the bearing hole and is fixed to the outside of the bearing hole.

2. The bearing-mounted pressure sensor according to claim 1, characterized in that: The pressure plate is integrally formed with the bearing housing body.

3. The bearing-mounted pressure sensor according to claim 2, characterized in that: One end of the top section extends to the inner wall of the bearing hole, and the other end extends horizontally outward.

4. The bearing-mounted pressure sensor according to claim 3, characterized in that: The intermediate extension section extends vertically downwards.

5. The bearing-mounted pressure sensor according to claim 4, characterized in that: The bottom section extends horizontally toward the bearing hole.

6. A fixed pulley type lifting torque limiter, comprising a pulley frame, a pulley block, a hanging plate, and a measuring shaft, wherein the pulley block is mounted on the measuring shaft via the hanging plate, characterized in that: Both ends of the metering shaft are mounted on the pulley frame via bearing seat pressure sensors as described in any one of claims 1-5.

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