A bearing fault detection device for CNC machine tools

Abstract

The utility model relates to a bearing fault detection device for a numerically controlled machine tool, comprising a bearing fault diagnostic instrument, a cable and a vibration sensor head, wherein the bearing fault diagnostic instrument is electrically connected to the vibration sensor head through a cable, a fixing ring is fixedly installed on the outer side of the vibration sensor head, and a fixing mechanism is arranged inside the fixing ring; the fixing mechanism comprises a threaded tube fixedly connected to the top of the fixing ring, a threaded rod is threadedly connected to the inner surface of the threaded tube, a connecting ring is movably connected to the inside of the fixing ring, a connecting groove is provided on the top of the connecting ring, and a fixing block is fixedly connected to the bottom end of the threaded rod. The bearing fault detection device for a numerically controlled machine tool connects the bearing fault diagnostic instrument and the vibration sensor head through a cable, fits the vibration sensor head to the bearing end cover, and can be fixed by using a fixing mechanism according to the material selection of the bearing end cover, thereby facilitating the fixing to the bearing end cover.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing fault detection, in particular to a bearing fault detection device for a numerically controlled machine tool. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Machine tool bearing failure is one of the common problems in mechanical equipment. It will affect the accuracy and performance of the machine tool and may even cause equipment downtime. Understanding the causes and characteristics of machine tool bearing failures, as well as how to prevent and eliminate them, is crucial to ensuring the normal operation of the machine tool and extending its service life.

[0003] The bearing fault detector is a multifunctional equipment fault diagnosis instrument that integrates an impact pulse meter, a vibration meter and a stethoscope. It can be used to check the operating status of rotating machinery, thereby detecting mechanical faults and providing data for effective preventive maintenance. It can be widely used in aerospace, metallurgy, chemical industry, light industry, shipbuilding and other fields.

[0004] When the existing bearing fault detector detects the bearing status, the main machine and the vibration sensor are connected by a cable. The vibration sensor generally uses a magnetic base and is adsorbed on the bearing end cover of the device under test. The measurement position is based on the rigid connection with the bearing. However, the bearing end cover is not all made of materials that can be adsorbed by the magnetic base, resulting in the inability to connect with the bearing end cover. Additional tools are required to fix it. Therefore, a CNC machine tool bearing fault detection device is proposed to solve the above problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a bearing fault detection device for CNC machine tools, which has the advantages of being easy to connect with the bearing end cover, and solves the problem that the bearing end covers are not all made of materials that can be adsorbed by the magnetic seat, resulting in the inability to connect with the bearing end covers and requiring additional tools to fix them.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bearing fault detection device for a CNC machine tool, comprising a bearing fault diagnostic instrument, a cable and a vibration sensor head, wherein the bearing fault diagnostic instrument is electrically connected to the vibration sensor head through the cable, a fixing ring is fixedly installed on the outer side of the vibration sensor head, and a fixing mechanism is arranged inside the fixing ring;

[0007] The fixing mechanism includes a threaded tube fixedly connected to the top of the fixing ring, a threaded rod is threadedly connected to the inner surface of the threaded tube, a connecting ring is movably connected inside the fixing ring, a connecting groove is provided at the top of the connecting ring, a fixing block is fixedly connected to the bottom end of the threaded rod, the fixing block is located inside the connecting groove, an installation groove is provided at the bottom of the connecting ring, an adhesive strip is fixedly connected to the inner top wall of the installation groove, and a magnet ring is attached to the bottom of the connecting ring.

[0008] Furthermore, a limiting plate is fixedly connected to the outer surface of the threaded rod and located below the threaded tube, and the limiting plate is parallel to the fixing ring.

[0009] Furthermore, a handle is fixedly connected to the top end of the threaded rod, and an outer surface of the handle is provided with anti-slip grooves.

[0010] Furthermore, the cross section of the connecting groove is in a "convex" shape, and the bottom size is larger than the top size.

[0011] Furthermore, the bottom of the fixing ring is missing, and the magnet ring is in contact with the inner wall of the fixing ring.

[0012] Furthermore, the bottom of the magnet ring is located on the same plane as the bottom of the fixing ring and the bottom of the vibration sensor head.

[0013] Furthermore, the connecting ring is made of iron and is adsorbed onto the magnet ring.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The bearing fault detection device for CNC machine tools can rotate a threaded rod, and the threaded rod is threadedly connected to a threaded pipe, so that the connecting ring can be driven to move up and down until the connecting ring and the bottom of the vibration sensor head are located on the same plane, and the vibration sensor head is fitted with the bearing end cover, so that the magnet ring is adsorbed to the bearing end cover, thereby completing the fixation; when it is necessary to fix the bearing end cover that cannot be adsorbed by the magnet, the threaded rod is rotated until the connecting ring is pushed out of the outside of the fixing ring, and since the magnet ring is adsorbed and connected to the connecting ring, it is convenient to take out the magnet ring, so that the adhesive strip is exposed, and the sticker on the surface of the adhesive strip is torn off, and the threaded rod is reversed until the adhesive strip and the vibration sensor head are located on the same plane, so that the adhesive strip in the mounting groove is bonded to the bearing end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the fixing mechanism structure of the utility model;

[0018] Figure 3 For this utility model Figure 1 A magnified view of the local structure of the middle part A;

[0019] Figure 4 It is a stereoscopic diagram of the connection structure between the vibration sensor head and the fixing ring of the utility model.

[0020] In the figure: 1 bearing fault diagnosis instrument, 2 cable, 3 vibration sensor head, 4 fixing ring, 5 fixing mechanism, 501 threaded tube, 502 threaded rod, 503 connecting ring, 504 connecting groove, 505 fixing block, 506 installation groove, 507 adhesive strip, 508 magnet ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figure 1-4 A bearing fault detection device for a CNC machine tool in this embodiment includes a bearing fault diagnostic instrument 1, a cable 2 and a vibration sensor head 3. The bearing fault diagnostic instrument 1 is electrically connected to the vibration sensor head 3 through the cable 2. A fixing ring 4 is fixedly installed on the outer side of the vibration sensor head 3, and a fixing mechanism 5 is arranged inside the fixing ring 4.

[0023] The bearing fault diagnostic instrument 1 and the vibration sensor head 3 are connected through the cable 2. The vibration sensor head 3 and the cable 2 are connected by a threaded connection method. The threaded connection method realizes the connection of the sensor by matching the wires of the sensor with the threaded terminal threads. The vibration sensor head 3 is fitted with the bearing end cover. It can be fixed by a fixing mechanism 5 according to the material selection of the bearing end cover, which facilitates the fixation to the bearing end cover.

[0024] Among them, when the bearing fault diagnostic instrument 1 is used, appropriate parameters such as sampling rate and measurement time are set. Vibration data is collected, and the results are viewed through the screen or output of the detector, and then the data is analyzed to determine whether the bearing is faulty, as well as the nature and severity of the fault. The bearing fault detector mainly works by capturing vibration signals when the equipment is running. When a bearing or other mechanical component fails, such as wear, pitting or looseness, specific high-frequency vibrations are generated. The bearing fault detector is able to detect these vibration signals and convert them into signals that can be analyzed.

[0025] The vibration sensor head 3 can be an acceleration sensor, a velocity sensor or a displacement sensor, which can convert the vibration signal into an electrical signal for easy collection, analysis and processing. In the diagnosis of bearing faults, the vibration sensor can capture the tiny vibrations of the bearing during operation, and the vibration signal reflects the health of the bearing. By analyzing the characteristics of these signals, such as frequency, amplitude, phase, etc., it is possible to identify whether the bearing is abnormal or faulty.

[0026] Embodiment 2: On the basis of embodiment 1, the fixing mechanism 5 includes a threaded tube 501 fixedly connected to the top of the fixing ring 4, a threaded rod 502 is threadedly connected to the inner surface of the threaded tube 501, a limit plate is fixedly connected to the outer surface of the threaded rod 502 and located below the threaded tube 501, the limit plate is parallel to the fixing ring 4, a handle is fixedly connected to the top of the threaded rod 502, the outer surface of the handle is provided with anti-slip grooves, a connecting ring 503 is movably connected inside the fixing ring 4, a connecting groove 504 is provided at the top of the connecting ring 503, the cross-section of the connecting groove 504 is in the shape of a "convex" character, and the bottom dimension is larger than the top dimension, a fixing block 505 is fixedly connected to the bottom end of the threaded rod 502, and the fixing block 505 is located inside the connecting groove 504, a mounting groove 506 is provided at the bottom of the connecting ring 503, an adhesive strip 507 is fixedly connected to the inner top wall of the mounting groove 506, and a magnet ring 508 is attached to the bottom of the connecting ring 503.

[0027] Among them, the bottom of the fixed ring 4 is missing, and the magnet ring 508 is in contact with the inner wall of the fixed ring 4. The bottom of the magnet ring 508 is located on the same plane as the bottom of the fixed ring 4 and the vibration sensor head 3 respectively. The connecting ring 503 is made of iron and adsorbed with the magnet ring 508. The magnet ring 508 is pressed with ferroferric oxide powder, filler and adhesive, and can absorb metals such as iron, nickel and cobalt.

[0028] When fixing to the iron bearing end cover, the threaded rod 502 can be rotated, and the threaded rod 502 is threadedly connected to the threaded tube 501, thereby driving the connecting ring 503 to move up and down until the connecting ring 503 and the bottom of the vibration sensor head 3 are located on the same plane, and the vibration sensor head 3 is fitted with the bearing end cover, so that the magnet ring 508 is adsorbed on the bearing end cover, thereby completing the fixation; when it is necessary to fix to the bearing end cover that the magnet cannot be adsorbed, the threaded rod 502 is rotated until the connecting ring 503 is pushed out of the outside of the fixing ring 4, and since the magnet ring 508 is adsorbed and connected to the connecting ring 503, it is convenient to take out the magnet ring 508, so that the adhesive strip 507 is exposed, and the sticker on the surface of the adhesive strip 507 is torn off, and the threaded rod 502 is reversed until the adhesive strip 507 and the vibration sensor head 3 are located on the same plane, so that the adhesive strip 507 in the mounting groove 506 is bonded to the bearing end cover.

[0029] The working principle of the above embodiment is:

[0030] The bearing fault diagnostic instrument 1 and the vibration sensor head 3 are connected through the cable 2, and the vibration sensor head 3 is fitted with the bearing end cover. When fixing with the iron bearing end cover, the threaded rod 502 can be rotated, and the threaded rod 502 is threadedly connected with the threaded tube 501, so that the connecting ring 503 can be driven to move up and down until the connecting ring 503 and the bottom of the vibration sensor head 3 are located on the same plane, and the vibration sensor head 3 is fitted with the bearing end cover, so that the magnet ring 508 is adsorbed with the bearing end cover, thereby completing the fixation; When it is necessary to fix the bearing end cover that cannot be adsorbed by the magnet, rotate the threaded rod 502 until the connecting ring 503 is pushed out of the outside of the fixing ring 4. Since the magnet ring 508 is adsorbed and connected to the connecting ring 503, it is convenient to take out the magnet ring 508, so that the adhesive strip 507 is exposed, and the sticker on the surface of the adhesive strip 507 is torn off, and the threaded rod 502 is reversed until the adhesive strip 507 and the vibration sensor head 3 are located on the same plane, so that the adhesive strip 507 in the installation groove 506 is bonded to the bearing end cover.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bearing fault detection device for a numerically controlled machine tool, comprising a bearing fault diagnostic instrument (1), a cable (2) and a vibration sensor head (3), characterized in that: The bearing fault diagnostic instrument (1) is electrically connected to a vibration sensor head (3) via a cable (2); a fixing ring (4) is fixedly mounted on the outer side of the vibration sensor head (3); and a fixing mechanism (5) is provided inside the fixing ring (4); The fixing mechanism (5) comprises a threaded tube (501) fixedly connected to the top of the fixing ring (4); the inner surface of the threaded tube (501) is threadedly connected to a threaded rod (502); the interior of the fixing ring (4) is movably connected to a connecting ring (503); the top of the connecting ring (503) is provided with a connecting groove (504); the bottom end of the threaded rod (502) is fixedly connected to a fixing block (505); the fixing block (505) is located inside the connecting groove (504); the bottom of the connecting ring (503) is provided with a mounting groove (506); the inner top wall of the mounting groove (506) is fixedly connected to an adhesive strip (507); and the bottom of the connecting ring (503) is affixed with a magnet ring (508).

2. A bearing fault detection device for a CNC machine tool according to claim 1, characterized in that: A limit plate is fixedly connected to the outer surface of the threaded rod (502) and is located below the threaded tube (501), and the limit plate is parallel to the fixing ring (4).

3. A bearing fault detection device for a CNC machine tool according to claim 1, characterized in that: The top end of the threaded rod (502) is fixedly connected to a handle, and the outer surface of the handle is provided with anti-slip grooves.

4. A bearing fault detection device for a CNC machine tool according to claim 1, characterized in that: The cross section of the connecting groove (504) is in a "convex" shape, with the bottom dimension being larger than the top dimension.

5. The bearing fault detection device for a CNC machine tool according to claim 1, characterized in that: The bottom of the fixing ring (4) is missing, and the magnet ring (508) is in contact with the inner wall of the fixing ring (4).

6. A bearing fault detection device for a CNC machine tool according to claim 1, characterized in that: The bottom of the magnet ring (508) is located on the same plane as the bottom of the fixing ring (4) and the bottom of the vibration sensor head (3).

7. A bearing fault detection device for a CNC machine tool according to claim 1, characterized in that: The connecting ring (503) is made of iron and is attracted to the magnet ring (508).

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