Insulation outer ring test fixture

Abstract

The insulating outer ring testing tool disclosed herein comprises a conductive sleeve that is interference-fitted onto the outer side of the insulating outer ring; conductive voltage covers that are detachably attached to the end surfaces of the insulating outer ring; and a conductive arc plate assembly that mates with the raceway of the insulating outer ring. The conductive arc plate assembly comprises two conductive arc plates, each with a convex arc surface on one side that mates with the raceway of the insulating outer ring. The conductive sleeve and two conductive voltage covers fully cover the insulating coating, and the interference fit between the conductive sleeve and the insulating outer ring ensures a tight fit between the outer circumference of the outer ring and the conductive sleeve, resulting in convenient operation and accurate measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to an insulating outer ring testing tool. Background Art

[0002] When measuring the insulation resistance and capacitance of the insulating outer ring, a traditional test tool is to wrap the insulating outer ring with copper foil. This test method has two major disadvantages: first, the outer diameter of the insulation is not wrapped tightly, and second, the outer ring end face cannot be wrapped or the wrapping gap is large. These two shortcomings result in the measured results being too high, which does not match the insulation performance of the insulated bearing under actual working conditions. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention aims to provide an insulating outer ring testing tool with a simple structure, convenient operation and accurate measurement.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The insulating outer ring test fixture includes a conductive sleeve that is interference-fitted on the outside of the insulating outer ring, a conductive voltage cover that is adhered to the end faces of both sides of the insulating outer ring and is detachably connected to the conductive sleeve, and a conductive arc plate assembly that is adhered to the raceway of the insulating outer ring. The conductive arc plate assembly includes two conductive arc plates, and each conductive arc plate is provided with an outer convex arc surface on one side that is adapted to the raceway of the insulating outer ring.

[0006] Furthermore, the conductive arc plate assembly also includes a torsion spring, and each conductive arc plate is provided with a radial section on the side opposite to the outer convex arc surface. Connecting rods are integrally extended from both ends of the torsion spring, and each connecting rod is fixedly connected to the radial sections of the two conductive arc plates.

[0007] Furthermore, a bent portion is provided at the tail end of the connecting rod, the bent portion is perpendicular to the connecting rod, and the bent portion is inserted into the mounting hole of the radial section.

[0008] Furthermore, the conductive voltage cover is detachably mounted on the end surface of the conductive sleeve by screws.

[0009] Furthermore, multiple threaded holes are provided on both end faces of the conductive sleeve, and the multiple threaded holes are evenly distributed. Each conductive voltage cover is provided with multiple through holes corresponding to the multiple threaded holes, and the threaded ends of the screws pass through the through holes and are screwed into the threaded holes.

[0010] Furthermore, the conductive pressure cover is an annular pressure cover, and the inner diameter of the annular pressure cover is adapted to the inner diameter of the insulating outer ring.

[0011] Furthermore, an annular flange is provided on the conductive cover, and the end face of the annular flange is adapted to the end face of the insulating outer ring.

[0012] Furthermore, it also includes a press-in sleeve, which is used to press the insulating outer ring into the conductive sleeve. The outer diameter of the press-in sleeve is smaller than the outer diameter of the insulating outer ring, and the height of the press-in sleeve is greater than the height of the insulating outer ring.

[0013] Furthermore, it also includes an extrusion sleeve, the inner diameter of the extrusion sleeve is larger than the inner diameter of the conductive sleeve, and the height of the extrusion sleeve is larger than the height of the insulating outer ring.

[0014] The beneficial effects of the present invention compared with the prior art are:

[0015] The insulating outer ring testing tool provided by the present invention comprises a conductive sleeve that is interference-fitted onto the outer side of the insulating outer ring; conductive voltage covers that are attached to both end surfaces of the insulating outer ring and are detachably connected to the conductive sleeve; and a conductive arc plate assembly that is in contact with the raceway of the insulating outer ring. The conductive arc plate assembly comprises two conductive arc plates, each with a convex arc surface on one side that mates with the raceway of the insulating outer ring. The conductive sleeve and two conductive voltage covers fully cover the insulating coating, and the interference fit between the conductive sleeve and the insulating outer ring ensures a tight fit between the outer circumference of the outer ring and the conductive sleeve, resulting in convenient operation and accurate measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A top view of a conductive sleeve according to an embodiment of the present invention;

[0017] Figure 2 This is a front view of a conductive sleeve according to an embodiment of the present invention;

[0018] Figure 3 A top view of a conductive cover according to an embodiment of the present invention;

[0019] Figure 4 This is a front view of a conductive cover according to an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the three-dimensional structure of the conductive arc plate assembly according to an embodiment of the present invention.

[0021] Figure 6 A top view of a press-in sleeve according to an embodiment of the present invention;

[0022] Figure 7 This is a front view of a press-in sleeve according to an embodiment of the present invention;

[0023] Figure 8 A top view of an extrusion sleeve according to an embodiment of the present invention;

[0024] Figure 9 This is a front view of an extrusion sleeve according to an embodiment of the present invention.

[0025] In the figure: 1. conductive sleeve, 1.1. threaded hole, 2. conductive voltage cover, 2.1. through hole, 2.2. annular flange, 3. conductive arc plate, 3.1. arc surface, 3.2. section, 4. torsion spring, 4.1. connecting rod, 5. press-in sleeve, 6. press-out sleeve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Example 1

[0028] like Figure 1-9 As shown, the insulating outer ring test fixture includes a conductive sleeve 1 for interference fit around the outside of the insulating outer ring, a conductive voltage cover 2 for fitting onto the end surfaces of the insulating outer ring and detachably connected to the conductive sleeve 1, and a conductive arc plate assembly for fitting onto the raceway of the insulating outer ring. The conductive arc plate assembly includes two conductive arc plates 3 and a torsion spring 4. Each conductive arc plate 3 has a convex arc surface 3.1 on one side that matches the raceway of the insulating outer ring. Each conductive arc plate 3 has a radial section 3.2 on the side opposite the convex arc surface 3.1. Connecting rods 4.1 extend integrally from both ends of the torsion spring 4. Each connecting rod 4.1 is fixedly connected to the radial section 3.2 of each conductive arc plate 3. Specifically, the tail end of the connecting rod 4.1 is provided with a bent portion, which is perpendicular to the connecting rod 4.1 and is inserted into the mounting hole of the radial section 3.2. It should be noted that the size of the outer convex arc surface 3.1 of the conductive circular arc plate 3 in this embodiment can be set according to actual needs. The axial height of the conductive sleeve 1 in this embodiment is adapted to the axial height of the insulating outer ring.

[0029] The conductive voltage cover 2 in this embodiment is an annular pressure cover, the inner diameter of which matches the inner diameter of the insulating outer ring. The conductive voltage cover 2 is removably mounted on the end face of the conductive sleeve 1 via screws. Specifically, both end faces of the conductive sleeve 1 are provided with multiple threaded holes 1.1, which are evenly distributed. Each conductive voltage cover 2 is provided with multiple through holes 2.1 corresponding to the multiple threaded holes 1.1. The through holes 2.1 are arranged axially, and the threaded ends of the screws pass through the through holes 2.1 and screw into the threaded holes 1.1. It should be noted that the screws in this embodiment are made of a conductive material, such as metal. The screws not only secure the conductive voltage cover 2 to the conductive sleeve 1, but also facilitate electrical conductivity between the conductive voltage cover 2 and the conductive sleeve 1. Preferably, the conductive cover 2 is provided with an annular flange 2.2, the end face of which matches the end face of the insulating outer ring. During use, the annular flange 2.2 is installed within the conductive sleeve 1 and tightly fits the end face of the insulating outer ring. The provision of annular flange 2.2 enhances the stability of the overall fixture during use and increases the contact area between the conductive cover 2 and the conductive sleeve, as well as between the conductive cover 2 and the end face of the insulating outer ring, thereby ensuring good electrical conductivity. It should be noted that when the conductive cover 2 is provided with annular flange 2.2, the height of the conductive sleeve 1 is equal to or slightly less than the height of the insulating outer ring plus the height of the two annular flanges 2.2. This ensures that the conductive cover 2, the end face of the insulating outer ring, and the conductive sleeve 1 are in close contact after the measuring fixture is pressed into the insulating outer ring.

[0030] This embodiment further includes a press-in sleeve 5 and a press-out sleeve 6. The press-in sleeve 5 is used to press the insulating outer ring into the conductive sleeve 1. The outer diameter of the press-in sleeve 5 is smaller than the outer diameter of the insulating outer ring, and the height of the press-in sleeve 5 is greater than the height of the insulating outer ring. During press-in, the insulating outer ring is coaxially placed above the conductive sleeve 1, and the press-in sleeve 5 is coaxially placed above the insulating outer ring. Downward pressure is applied to the press-in sleeve 5 to press the insulating outer ring into the conductive sleeve 1. The press-in sleeve 5 in this embodiment can ensure uniform force on the entire insulating outer ring during press-in, preventing the insulating coating on the insulating outer ring from cracking or peeling.

[0031] The extrusion sleeve 6 is used to press the insulating outer ring out of the conductive sleeve 1. The inner diameter of the extrusion sleeve 6 is larger than the inner diameter of the conductive sleeve 1, and the height of the extrusion sleeve 6 is greater than the height of the insulating outer ring. During extrusion, the conductive sleeve 1 is coaxially placed on the extrusion sleeve 6, and the press-in sleeve 5 is coaxially placed on the insulating outer ring. The press-in sleeve 5 applies downward pressure to press the insulating outer ring out of the conductive sleeve 1 and into the extrusion sleeve 6. The extrusion sleeve 6 in this embodiment can prevent the insulating coating of the insulating outer ring from cracking or peeling during extrusion. It should be noted that the insulating outer ring in this embodiment is a bearing outer ring with an insulating layer coated on the outer circumference and both end faces.

[0032] Working Principle: During use, the insulating outer ring is pressed into the conductive sleeve 1 using the press-in sleeve 5, ensuring an interference fit between the insulating outer ring and the conductive sleeve 1. The end face of the annular flange 2.2 on the conductive cover 2 is aligned with the end face of the insulating outer ring and screwed onto the conductive sleeve 1. The conductive arc plate 3 is placed into the insulating outer ring raceway. The tension of the torsion spring 4 ensures that the convex surface 3.1 of the conductive arc plate 3 is in close contact with the raceway surface. An ohmmeter or other measuring instrument is clamped between the screws on the conductive cover 2 and the connecting rod 4.1 of the torsion spring 4 to perform the measurement. After the measurement is completed, the insulating outer ring is pressed out of the conductive sleeve 1 using the press-in sleeve 5 and the press-out sleeve 6. The advantage of this testing fixture is that it can be used in special environments such as high temperature and high humidity without any environmental impact or changes. No manual contact is required, and wiring can be pre-arranged to complete all measurements of the insulated bearing under the fixture, while also ensuring the safety of the tester.

[0033] The beneficial effects of this embodiment compared with the prior art are:

[0034] 1. This embodiment uses a conductive sleeve 1 and two conductive voltage covers 2 to achieve full coverage of the insulating coating. The interference fit between the conductive sleeve 1 and the insulating outer ring allows the outer circumference of the outer ring to be tightly fitted to the conductive sleeve 1. The two conductive voltage covers 2 are tightly fitted to the end faces of the outer ring via screws. When testing the performance of the insulating outer ring, voltage is applied to both the outer circumference and the end faces of the insulating outer ring, preventing defects in the end face insulating coating from going undetected.

[0035] 2. By adopting the press-in sleeve 5 and the press-out sleeve 6, it can be ensured that the insulating coating on the insulating outer ring is subjected to uniform force when the conductive sleeve 1 is pressed in or pressed out, thereby avoiding local concentrated force that causes the insulating coating to rupture.

[0036] 3. By using a conductive arc plate assembly, the diameter of arc surface 3.1 of the arc plate can be increased to increase the raceway contact area, while the diameter of arc surface 3.1 can be reduced to reduce the raceway contact area. By changing the contact area between arc surface 3.1 and the raceway, the contact area between the rolling element and the outer ring raceway can be simulated, thereby obtaining more accurate test results.

[0037] 4. When measuring the insulation performance of insulated bearings in a simulated high temperature and high humidity environment, it is possible to remove the insulated bearings from the constant temperature and humidity chamber, making testing more convenient.

[0038] 5. This embodiment can be used repeatedly through the press-in sleeve 5 and the press-out sleeve 6 to detect multiple insulating outer rings, and can also simulate the impact of multiple press-in and press-out sleeves on the insulating coating of one outer ring. The operation is simple.

[0039] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two elements or an interaction relationship between two elements. Unless otherwise clearly specified and limited, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0041] Although the embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these 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. Insulation outer ring test fixture, characterized by: It includes a conductive sleeve that is interference-fitted on the outside of the insulating outer ring, a conductive voltage cover that is attached to the end faces of both sides of the insulating outer ring and is detachably connected to the conductive sleeve, and a conductive arc plate assembly that is attached to the raceway of the insulating outer ring. The conductive arc plate assembly includes two conductive arc plates, and each conductive arc plate has a convex arc surface on one side that is adapted to the raceway of the insulating outer ring; The conductive arc plate assembly also includes a torsion spring, each of the conductive arc plates is provided with a radial section on one side opposite to the outer convex arc surface, and connecting rods are integrally extended from both ends of the torsion spring, and each connecting rod is fixedly connected to the radial sections of the two conductive arc plates respectively; The tail end of the connecting rod is provided with a bent portion, the bent portion is perpendicular to the connecting rod, and the bent portion is inserted into the mounting hole of the radial section; The conductive cover is provided with an annular flange, and the end face of the annular flange is adapted to the end face of the insulating outer ring; The annular flange is installed in the conductive sleeve and fits tightly with the end surface of the insulating outer ring; the height of the conductive sleeve is equal to or less than the height of the insulating outer ring plus the height of the two annular flanges; It also includes a press-in sleeve, which is used to press the insulating outer ring into the conductive sleeve, the outer diameter of the press-in sleeve is smaller than the outer diameter of the insulating outer ring, and the height of the press-in sleeve is greater than the height of the insulating outer ring; It also includes an extrusion sleeve, wherein the inner diameter of the extrusion sleeve is greater than the inner diameter of the conductive sleeve, and the height of the extrusion sleeve is greater than the height of the insulating outer ring; During use, the insulating outer ring is pressed into the conductive sleeve through the press-in sleeve, and the insulating outer ring and the conductive sleeve are interference fit. The end face of the annular flange on the conductive voltage cover is fitted with the end face of the insulating outer ring and installed on the conductive sleeve through screws. The conductive arc plate is placed in the raceway of the insulating outer ring. Under the action of the tension of the torsion spring, the outer convex arc surface of the conductive arc plate is tightly fitted with the raceway surface; one end of the ohmmeter is clamped to the screw on the conductive voltage cover, and the other end is clamped to the connecting rod of the torsion spring to perform measurement; after the measurement is completed, the insulating outer ring is pressed out of the conductive sleeve by the press-in sleeve and the press-out sleeve.

2. The insulating outer ring testing tool according to claim 1, characterized in that: The conductive voltage cover is detachably mounted on the end surface of the conductive sleeve by screws.

3. The insulating outer ring testing tool according to claim 2, characterized in that: A plurality of threaded holes are provided on both end surfaces of the conductive sleeve, and the plurality of threaded holes are evenly distributed. A plurality of through holes corresponding to the plurality of threaded holes are provided on each conductive voltage cover, and the threaded ends of the screws pass through the through holes and are screwed into the threaded holes.

4. The insulating outer ring testing tool according to claim 1, characterized in that: The conductive pressure cover is an annular pressure cover, and the inner diameter of the annular pressure cover is adapted to the inner diameter of the insulating outer ring.

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