Insulated shaft unit assembly

Abstract

The utility model relates to an insulating shaft unit assembly, including by metal material made output end flange spare, by metal material made input end flange, by non -metal material made insulating board, by metal material made first fastening bolt and by non -metal material made insulating washer, the insulating board insulating isolation output end flange spare with input end flange, first fastening bolt will output end flange spare, input end flange with insulating board lock and fix as a whole, and first fastening bolt passes through insulating washer insulating isolation input end flange, through the first fastening bolt to output end flange spare, input end flange with insulating board exerted force moment after generating the pre -tightening force of insulating board to make output end flange spare, input end flange with insulating board between rely on friction to realize the transmission of torque.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, specifically to an insulated shaft unit assembly. Background Technology

[0002] A shaft unit is a mechanical structural component used to connect two rotating shafts together to transmit power. It typically consists of two or more mechanical modules, one end of which connects to the output end of the driving shaft, and the other end connects to the input end of the driven shaft, ensuring stable operation of the transmission system. In some equipment, to disconnect the electrical connection of the shaft system or increase thermal conductivity resistance, insulated shaft units are used to make the two ends of the shaft mutually insulated. This blocks current conduction or reduces heat conduction while transmitting power, preventing electrolytic corrosion or reducing heat transfer, thus improving equipment reliability.

[0003] Existing technologies typically include two types of insulated shaft unit structures. The first type of insulated shaft unit structure uses all non-metallic insulating materials. This type of insulated shaft unit structure relies on the material properties of the non-metallic materials themselves to transmit power and meet insulation requirements. While using all non-metallic materials provides excellent insulation performance, the material strength is still slightly insufficient compared to steel, making it unable to meet the testing requirements for high torque. Moreover, due to the low elastic modulus and non-linear changes in the material properties of non-metallic materials, high-precision machining cannot be achieved, thus failing to meet the testing requirements for high speeds.

[0004] The second type of insulated shaft unit structure uses non-metallic insulating materials for some components. These non-metallic insulating materials isolate the metallic materials, achieving insulation between the two ends of the shaft, such as in a perforated coupling. Taking the perforated coupling as an example, its power transmission relies on radial compression of the central non-metallic elastic material, and its insulation also relies on this material to isolate the shaft current at both ends of the unit. However, due to its structure, the central non-metallic elastic material experiences high-frequency repeated compression and friction during transmission, which reduces its service life and consequently the coupling's lifespan. Furthermore, this high-frequency friction poses a certain fire hazard to this type of coupling. Utility Model Content

[0005] The purpose of this invention is to provide an insulated shaft unit assembly that can achieve high torque and high speed operation while ensuring shaft system insulation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An insulated shaft unit assembly includes an output flange made of a metallic material, an input flange made of a metallic material, an insulating plate made of a non-metallic material, a first fastening bolt made of a metallic material, and an insulating washer made of a non-metallic material.

[0008] The output flange and the input flange are arranged facing each other, and the insulating plate is located between the output flange and the input flange and insulates and isolates the output flange and the input flange.

[0009] The output flange, the input flange, and the insulating plate are provided with multiple sets of first fixing holes. Each set of first fixing holes is used to accommodate one first fastening bolt. The first fastening bolt locks and fixes the output flange, the input flange, and the insulating plate into a whole. The first fastening bolt is insulated and isolated from the input flange by the insulating washer.

[0010] The preload generated by applying torque to the output flange, the input flange, and the insulating plate through the first fastening bolt enables the transmission of torque between the output flange, the input flange, and the insulating plate through friction.

[0011] In one embodiment, the insulating shaft unit assembly further includes a metal washer, both the insulating washer and the metal washer being fitted onto the threaded portion of the first fastening bolt, wherein one end face of the insulating washer abuts against the input flange, the other end face abuts against one end face of the metal washer, and the other end face of the metal washer abuts against the inner side of the nut of the first fastening bolt.

[0012] In one embodiment, the outer diameter of the insulating washer is larger than the outer diameter of the metal washer.

[0013] In one embodiment, the first fixing hole includes a first portion located on the output flange, a second portion located on the insulating plate, and a third portion located on the input flange.

[0014] In one embodiment, the first part of the first fixing hole is a blind hole, and its hole wall is provided with a first internal thread that matches the external thread of the first fastening bolt. The second and third parts of the first fixing hole are through holes that pass through the insulating plate and the input end flange, respectively, and the screw part of the first fastening bolt does not contact the hole wall of the third part of the first fixing hole.

[0015] In one embodiment, the input flange is provided with a first countersunk hole around the third part of the first fixing hole, the nut portion of the first fastening bolt is recessed into the first countersunk hole, and the nut portion of the first fastening bolt does not contact the hole wall of the first countersunk hole.

[0016] In one embodiment, the output flange, the input flange, and the insulating plate are further provided with multiple sets of second fixing holes, each set of second fixing holes being used to accommodate a second fastening bolt.

[0017] The second fastening bolt is made of metal and is insulated from the output flange by the insulating washer.

[0018] In one embodiment, the second fixing hole is a through hole penetrating the output flange, the input flange, and the insulating plate, and the threaded portion of the second fastening bolt does not contact the hole wall of the second fixing hole.

[0019] In one embodiment, the output flange is provided with a second countersunk hole around the second fixing hole, the nut portion of the second fastening bolt is recessed into the second countersunk hole, and the nut portion of the second fastening bolt does not contact the hole wall of the second countersunk hole.

[0020] The beneficial effects of this utility model, which adopts the above-mentioned technical solution, are as follows: the working principle of the insulated shaft unit assembly provided in this embodiment relies on friction to transmit torque, and the frictional force is proportional to the preload of the first fastening bolt. After the insulated shaft unit is installed, the maximum torque that the shaft system can transmit within a certain range can be controlled by controlling the torque value of the mounting bolt. Because the structure of the insulated shaft unit assembly itself creates an insulation relationship between the input and output ends, it can achieve the isolation of the shaft's electrical connection; moreover, both the input and output ends of the insulated shaft unit assembly are precision-machined metal flanges, solving the problem of insufficient rigidity of non-metallic materials and meeting the requirements of high torque and high speed testing conditions. Attached Figure Description

[0021] Figure 1 This is a top view of the insulated shaft unit assembly.

[0022] Figure 2 yes Figure 1 Sectional view at point AA.

[0023] Figure 3 yes Figure 2 Enlarged view of point B in the middle.

[0024] Figure 4 yes Figure 2 Enlarged view of point C in the middle.

[0025] Figure 5 yes Figure 2 Enlarged view of point D in the middle. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0027] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0028] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0029] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0030] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0031] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0032] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0034] like Figures 1-5 As shown, this utility model proposes an insulated shaft unit assembly 100, which includes an output end flange 1 made of metal material, an input end flange 2 made of metal material, an insulating plate 3 made of non-metallic material, a first fastening bolt 4 made of metal material, a metal washer 5, and an insulating washer 6 made of non-metallic material.

[0035] Output flange 1 and input flange 2 are arranged facing each other. An insulating plate 3 is located between output flange 1 and input flange 2, providing insulation between them. Multiple sets of first fixing holes 7 are provided on output flange 1, input flange 2, and insulating plate 3. Each set of first fixing holes 7 accommodates a first fastening bolt 4. The first fastening bolt 4 locks and fixes output flange 1, input flange 2, and insulating plate 3 into a whole. The preload generated by applying torque to output flange 1, input flange 2, and insulating plate 3 through the first fastening bolt allows torque transmission between them via friction. Preferably, the insulating plate is a thin insulating plate, which significantly improves the overall torsional stiffness, enabling high rigidity and high dynamic speed and torque transmission.

[0036] The first fastening bolt 4 includes a first nut and a first screw for fixed connection, and the outer circumferential surface of the first screw is provided with a first external thread. The first fixing hole 7 includes a first part located at the output flange 1, a second part located at the insulating plate 3, and a third part located at the input flange 2. The first part of the first fixing hole 7 is a blind hole, and its hole wall is provided with a first internal thread that matches the first external thread of the first fastening bolt 4. The first fastening bolt 4 is fixed by the cooperation of the first internal thread and the external thread of the first fastening bolt 4. The second part of the first fixing hole 7 is a through hole penetrating the insulating plate 3. The diameter of the second part of the hole is larger than the outer diameter of the first screw, so that the screw part of the first fastening bolt 4 can pass through the insulating plate 3. The third part of the first fixing hole 7 is a through hole penetrating the input flange 2, and its diameter is larger than the outer diameter of the first screw, so that the screw part of the first fastening bolt 4 can pass through the input flange 2, and the screw part of the first fastening bolt 4 does not contact the hole wall of the third part of the first fixing hole 7.

[0037] Metal washer 5 and insulating washer 6 are sequentially fitted onto the outer circumference of the first thread of the first fastening bolt 4. One end face of the insulating washer 6 abuts against the input flange 2, and the other end face abuts against one end face of the metal washer 5. The other end face of the metal washer 5 abuts against the inner side of the first nut of the first fastening bolt 4. The insulating washer 6 serves to insulate and isolate the first fastening bolt 4 and the input flange 2, ensuring insulation between the output flange 1 and the input flange 2. The metal washer 5 ensures that the first fastening bolt 4 can apply sufficient preload to allow torque transmission between the output flange 1, the input flange 2, and the insulating plate 3 through friction. Preferably, the outer diameter of the insulating washer 6 is larger than the outer diameter of the metal washer 5 to further ensure insulation between the output flange 1 and the input flange 2.

[0038] In this embodiment, the input flange 2 is also provided with a first countersunk hole 21 around the third part of the first fixing hole 7. The depth and inner diameter of the first countersunk hole are greater than the height and outer diameter of the first nut of the first fastening bolt 4, so that the nut part of the first fastening bolt 4 can be recessed into the first countersunk hole, and the nut part does not contact the hole wall of the first countersunk hole, thus maintaining the insulation between the first fastening bolt 4 and the input flange 2.

[0039] Unlike existing technologies where plum blossom couplings transmit power by radially compressing a non-metallic elastomer in the middle, the insulating shaft unit assembly provided in this embodiment transmits torque through friction. The frictional force is proportional to the preload of the first fastening bolt. Once the insulating shaft unit is installed, the maximum torque that the shaft system can transmit within a certain range can be controlled by adjusting the torque value of the mounting bolts. Because the insulating shaft unit assembly itself is structurally insulated between the input and output ends, it effectively isolates the shaft from electrical connections. Furthermore, both the input and output ends of the insulating shaft unit assembly are precision-machined metal flanges, overcoming the limitations of insufficient rigidity in non-metallic materials and meeting the requirements of high torque and high speed testing conditions.

[0040] See also Figure 2 and Figure 5The output flange 1, input flange 2, and insulating plate 3 are also provided with multiple sets of second fixing holes 8. Each set of second fixing holes 8 is used to accommodate a second fastening bolt 9, which is used to fix the insulating shaft unit assembly 100 to the shaft. The second fastening bolt 9 is also made of metal to allow it to apply sufficient preload. To maintain the insulation between the first fastening bolt 4 and the input flange 2, the second fastening bolt 9, like the first fastening bolt 4, achieves insulation isolation with the output flange 1 through a combination of a metal washer 5 and an insulating washer 6. The second fixing hole 8 is a through hole that penetrates the output flange 1, input flange 2, and insulating plate 3. The diameter of the second fixing hole 8 is larger than the outer diameter of the threaded portion of the second fastening bolt 9, so that the threaded portion of the second fastening bolt 9 can pass through the second fixing hole 8 without contacting the hole wall, thereby maintaining the insulation isolation between the second fastening bolt 9 and the output flange 1.

[0041] In this embodiment, the output flange 1 is also provided with a second countersunk hole 11 around the second fixing hole 8. The depth and inner diameter of the second countersunk hole are greater than the height and outer diameter of the nut of the second fastening bolt 9, so that the nut part of the second fastening bolt 9 can be recessed into the second countersunk hole, and the nut part does not contact the hole wall of the second countersunk hole, thus maintaining the insulation between the second fastening bolt 9 and the output flange 1.

[0042] The preferred embodiments of this utility model have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this utility model. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An insulated shaft unit assembly, characterized in that, It includes an output flange made of metal, an input flange made of metal, an insulating plate made of non-metallic material, a first fastening bolt made of metal, and an insulating gasket made of non-metallic material; The output flange and the input flange are arranged facing each other, and the insulating plate is located between the output flange and the input flange and insulates and isolates the output flange and the input flange. The output flange, the input flange, and the insulating plate are provided with multiple sets of first fixing holes. Each set of first fixing holes is used to accommodate one first fastening bolt. The first fastening bolt locks and fixes the output flange, the input flange, and the insulating plate into a whole. The first fastening bolt is insulated and isolated from the input flange by the insulating washer. The preload generated by applying torque to the output flange, the input flange, and the insulating plate through the first fastening bolt enables the transmission of torque between the output flange, the input flange, and the insulating plate through friction.

2. The insulated shaft unit assembly as claimed in claim 1, characterized in that, The insulating shaft unit assembly also includes a metal washer. Both the insulating washer and the metal washer are fitted onto the threaded portion of the first fastening bolt. One end face of the insulating washer abuts against the input flange, and the other end face abuts against one end face of the metal washer. The other end face of the metal washer abuts against the inner side of the nut of the first fastening bolt.

3. The insulated shaft unit assembly as described in claim 2, characterized in that, The outer diameter of the insulating washer is larger than the outer diameter of the metal washer.

4. The insulated shaft unit assembly as claimed in claim 1, characterized in that, The first fixing hole includes a first part located on the output flange, a second part located on the insulating plate, and a third part located on the input flange.

5. The insulated shaft unit assembly as described in claim 4, characterized in that, The first part of the first fixing hole is a blind hole, and its hole wall is provided with a first internal thread that matches the external thread of the first fastening bolt. The second and third parts of the first fixing hole are through holes that pass through the insulating plate and the input end flange, respectively, and the screw part of the first fastening bolt does not contact the hole wall of the third part of the first fixing hole.

6. The insulated shaft unit assembly as claimed in claim 5, characterized in that, The input flange has a first countersunk hole around the third part of the first fixing hole. The nut part of the first fastening bolt is recessed into the first countersunk hole, and the nut part of the first fastening bolt does not contact the hole wall of the first countersunk hole.

7. The insulated shaft unit assembly as claimed in claim 1, characterized in that, The output flange, the input flange, and the insulating plate are also provided with multiple sets of second fixing holes, each set of second fixing holes being used to accommodate a second fastening bolt.

8. The insulated shaft unit assembly as claimed in claim 7, characterized in that, The second fastening bolt is made of metal and is insulated from the output flange by the insulating washer.

9. The insulated shaft unit assembly as claimed in claim 8, characterized in that, The second fixing hole is a through hole that passes through the output flange, the input flange and the insulating plate, and the threaded part of the second fastening bolt does not contact the hole wall of the second fixing hole.

10. The insulated shaft unit assembly as claimed in claim 8, characterized in that, The output flange is provided with a second countersunk hole around the second fixing hole. The nut portion of the second fastening bolt is recessed into the second countersunk hole, and the nut portion of the second fastening bolt does not contact the hole wall of the second countersunk hole.

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