Enameled wire and outgoing line connecting structure for motor and motor

Abstract

The invention relates to an enameled wire and outgoing line connecting structure for a motor and the motor, the enameled wire and outgoing line connecting structure comprises an enameled wire, an outgoing line, a wiring terminal, an isolating tube and an insulating sleeve, and the end part of the enameled wire and the end part of the outgoing line are relatively independent; the wiring terminal is respectively connected with the end part of the enameled wire and the end part of the outgoing line, so that the enameled wire is electrically connected with the outgoing line; the isolation tube is attached to the outer side of the wiring terminal so as to seal the wiring terminal, the end part of the enameled wire and the end part of the outgoing line; the insulating sleeve is sleeved outside the isolating tube, a filling space is formed between the isolating tube and the insulating sleeve, and the filling space is filled with filler. According to the enameled wire and outgoing line connecting structure for the motor and the motor, under the synergistic effect of the wiring terminal, the isolation pipe, the insulating sleeve and the filler, the electrochemical corrosion prevention and oxidation prevention effects of the enameled wire and outgoing line connecting structure are achieved, safe operation of the motor is facilitated, the reliability of the motor is improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and in particular to a connection structure of an enameled wire and a lead wire for a motor, and the motor. Background Art

[0002] Enameled wire is a crucial component of a motor's stator winding. Made from a metal conductor coated with an insulating varnish, lead wires serve as a bridge, electrically connecting the enameled wire and connecting the internal winding to external wiring. In motor production, aluminum enameled wire is often used for stator windings to reduce costs, while copper wire is often used for lead wires.

[0003] Traditionally, welding is often used to connect the enameled wire and lead wires of a motor. However, when copper and aluminum wires are directly connected, due to the different reactivity of copper and aluminum, the contact surface of the copper and aluminum will undergo a galvanic reaction under the influence of moisture, carbon dioxide, and other impurities in the air, causing electrochemical corrosion of the aluminum and increasing the resistance of the copper-aluminum connection. As a result, the temperature of the copper-aluminum connection can easily rise during motor operation, causing local overheating and even causing motor burnout, affecting the motor's reliability and service life. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology and to provide a connection structure of an enameled wire and a lead wire for a motor and a motor.

[0005] To achieve the above object, the technical solution of the present invention is: A connection structure between an enameled wire and a lead wire for a motor, the connection structure comprising: The enameled wire is set to be aluminum enameled wire; The lead wire is set as a copper wire, and the end of the enameled wire is relatively independent from the end of the lead wire; a connection terminal, connected to the end of the enameled wire and the end of the lead wire respectively, so as to electrically connect the enameled wire and the lead wire; an isolation tube, attached to the outer side of the terminal block to form a seal for the terminal block, the end of the enameled wire, and the end of the lead wire; The insulating sleeve is sleeved outside the isolation tube, and a filling space is formed between the isolation tube and the insulating sleeve, and the filling space is filled with fillers.

[0006] It can be understood that the end of the enameled wire is relatively independent of the end of the lead-out wire, that is, the enameled wire and the lead-out wire are not directly connected and contacted to avoid reaction between the copper wire and the aluminum wire. The isolation tube mechanically seals the terminal block to isolate humid air, making the connection between the enameled wire and the lead-out wire less prone to corrosion and oxidation. The insulating sleeve enhances the insulation effect and provides a container for the filler. The filler has the functions of strengthening sealing and strengthening insulation. In this way, under the synergistic effect of the terminal block, isolation tube, insulating sleeve and filler, the anti-electrochemical corrosion and anti-oxidation effects of the connection structure of the enameled wire and the lead-out wire are achieved, which is beneficial to the safe operation of the motor and improves the reliability and service life of the motor.

[0007] In one embodiment, the space between the isolation tube and the connection terminal is filled with colloid.

[0008] It is understandable that the isolation tube will shrink and wrap around the surface of the terminal after being heated. Therefore, before the isolation tube is heated, the colloid is applied between the terminal and the isolation tube. In this way, when the isolation tube is heated, the air between the isolation tube and the terminal is squeezed out as the isolation tube shrinks. In this way, the air in the isolation tube is reduced as much as possible to prevent oxygen and moisture in the air from oxidizing the connection between the enameled wire and the lead wire.

[0009] In one embodiment, the filler includes resin, flame retardant, modified material and auxiliary materials.

[0010] It is understandable that the filler has good properties of isolating oxygen and preventing electrochemical corrosion, and plays a role in strengthening sealing and insulation. Compared with common fillers such as sealants, the isolation effect is better.

[0011] In one embodiment, the resin includes at least one of polyesterimide resin, polyurethane, polyester resin, silicone resin, bismaleimide resin and epoxy resin.

[0012] In one embodiment, the modified material includes at least one of titanium dioxide, red iron oxide, carbon black, chrome yellow, mica powder, talc powder, barium sulfate, calcium carbonate and silicon dioxide.

[0013] In one embodiment, the flame retardant includes a reactive flame retardant and an additive flame retardant.

[0014] In one embodiment, the filler has a curing temperature of 135° C. to 145° C. and a curing time of 2 min to 5 min.

[0015] It is understandable that the filler has the characteristic of rapid sealing. It can fill microscopic gaps before curing and solve the sealing blind spots. Moreover, when the motor is running, if the temperature of the connection reaches the curing temperature, the filler will cure quickly, and the filler has a good sealing and insulating effect.

[0016] In one embodiment, yarn is provided outside the insulating sleeve, and the yarn is wound around the insulating sleeve, the enameled wire and the lead wire to fix the insulating sleeve relative to the isolation tube.

[0017] In one embodiment, the insulating sleeve is configured as a glass fiber tube or a wax tube, and the isolation tube is configured as a heat shrink tube.

[0018] The present invention also provides the following technical solutions: A motor comprises any one of the above-mentioned enameled wire and lead wire connection structures for the motor.

[0019] Effects of the present invention: The present invention seeks to protect a connection structure for an enameled wire and a lead wire for a motor, and a motor. The enameled wire and the lead wire are not directly connected and contacted to avoid reaction between the copper wire and the aluminum wire. The isolation tube mechanically seals the terminal block to isolate humid air, so that the connection between the enameled wire and the lead wire is not easily corroded or oxidized. The insulating sleeve enhances the insulation effect and provides a container for the filler. The filler has the functions of enhancing the seal and enhancing the insulation. In this way, under the synergistic effect of the terminal block, the isolation tube, the insulating sleeve and the filler, the anti-electrochemical corrosion and anti-oxidation effects of the connection structure for the enameled wire and the lead wire are achieved, the reliability of the connection is ensured, and the problem of prone to electrochemical corrosion in the copper-aluminum wire connection in the prior art is solved, which is beneficial to the safe operation of the motor and improves the reliability and service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A three-dimensional diagram of a connection structure between an enameled wire and a lead wire provided in one embodiment of the present invention; Figure 2 A schematic diagram of a connection structure between an enameled wire and a lead wire provided by an embodiment of the present invention from one perspective; Figure 3 A cross-sectional view of a connection structure between an enameled wire and a lead wire provided by one embodiment of the present invention.

[0022] Reference numerals: 100, enameled wire and lead wire connection structure; 10, enameled wire; 20, lead wire; 30, connection terminal; 40, isolation tube; 50, insulating sleeve; 60, filling space. DETAILED DESCRIPTION

[0023] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are for illustrative purposes only and do not represent the only implementation method.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the present description have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this description are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used in this description includes any and all combinations of one or more of the associated listed items.

[0028] See also Figures 1 to 3An embodiment of the present invention provides an enameled wire and lead wire connection structure for a motor. The enameled wire and lead wire connection structure 100 includes: an enameled wire 10, a lead wire 20, a terminal block 30, an isolation tube 40, and an insulating sleeve 50. The enameled wire 10 is set to be an aluminum enameled wire 10, and the lead wire 20 is set to be a copper wire. The end of the enameled wire 10 and the end of the lead wire 20 are relatively independent. The terminal block 30 is respectively connected to the end of the enameled wire 10 and the end of the lead wire 20 to electrically connect the enameled wire 10 and the lead wire 20. That is, the enameled wire 10 and the lead wire 20 are not directly connected or contacted to avoid reaction between the copper wire and the aluminum wire.

[0029] The isolation tube 40 is attached to the outside of the terminal block 30 to form a seal between the terminal block 30, the end of the enameled wire 10, and the end of the lead wire 20. The isolation tube 40 mechanically seals the terminal block 30, isolating it from moist air, and making the connection between the enameled wire 10 and the lead wire 20 less susceptible to corrosion and oxidation. The insulating sleeve 50 is sleeved on the outside of the isolation tube 40, and a filling space 60 is formed between the isolation tube 40 and the insulating sleeve 50. The filling space 60 is filled with a filler. The insulating sleeve 50 enhances the insulation effect and acts as a container for the filler. The filler has the functions of both enhancing the seal and enhancing the insulation. Through the reasonable arrangement between the isolation tube 40, the insulating sleeve 50, and the filler, moist air and oxygen are isolated, preventing electrochemical corrosion or oxidation at the connection.

[0030] In this way, under the synergistic effect of the terminal 30, the isolation tube 40, the insulating sleeve 50 and the filler, the anti-electrochemical corrosion and anti-oxidation effects of the connection structure of the enameled wire 10 and the lead wire 20 are achieved, which is beneficial to the safe operation of the motor and improves the reliability and service life of the motor.

[0031] In this embodiment, the isolation tube 40 is configured as a heat shrink tube, and the insulating sleeve 50 is configured as a fiberglass tube or a wax tube.

[0032] In one embodiment, a colloid is filled between the isolation tube 40 and the terminal 30. It should be noted that when heated, the isolation tube 40 shrinks and wraps around the surface of the terminal 30. Therefore, before the isolation tube 40 is heated, the colloid is applied between the terminal 30 and the isolation tube 40. This allows the air between the isolation tube 40 and the terminal 30 to be squeezed out as the isolation tube 40 shrinks when heated. This minimizes the amount of air in the isolation tube 40 and prevents oxygen and moisture in the air from oxidizing the connection between the enameled wire 10 and the lead wire 20.

[0033] In one embodiment, the filler includes resin, flame retardant, modified material and auxiliary materials. The filler has good oxygen isolation and anti-electrochemical corrosion properties, plays a role in strengthening sealing and insulation, and has a better isolation effect than common fillers such as sealants.

[0034] In this embodiment, the filler cures at a temperature of 135°C to 145°C for 2 to 5 minutes. The filler offers rapid sealing properties and is fluid before curing, filling microscopic gaps and addressing sealing blind spots. Furthermore, when the connection heat reaches the curing temperature during motor operation, the filler cures rapidly, providing excellent sealing and insulation. Specifically, the curing time can be 2, 3, 4, or 5 minutes.

[0035] Preferably, the curing temperature of the filler is 140° C. Of course, in other embodiments, the curing temperature of the filler may also be set to 135° C., 145° C., etc., which can be achieved by changing the ratio of the filler.

[0036] Specifically, the resin includes at least one of polyesterimide resin, polyurethane, polyester resin, silicone resin, bismaleimide resin, and epoxy resin. The resin is the main component of the filler and has good thermal stability and insulation properties, which determines the performance of the filler and achieves the effect of rapid curing of the filler.

[0037] Furthermore, the modified material includes at least one of titanium dioxide, red iron oxide, carbon black, chrome yellow, mica powder, talc, barium sulfate, calcium carbonate and silicon dioxide. The modified material is used to improve the flow characteristics of the filler.

[0038] Furthermore, flame retardants include reactive flame retardants and additive flame retardants, including but not limited to some common inorganic and organic flame retardants. Flame retardants are added to fillers to improve the flame retardancy of the fillers. Flame retardants include antimony trioxide, tribromophenol, decabromodiphenyl ether, melamine phosphate, and carbamates.

[0039] In one embodiment, a yarn (not shown) is disposed on the exterior of the insulating sleeve 50. The yarn is wound around the insulating sleeve 50, the enameled wire 10, and the lead wire 20 to secure the insulating sleeve 50 relative to the isolation tube 40. The yarn can be cotton, linen, or wool, and the yarn is wound around the insulating sleeve 50 to prevent it from slipping or deviating during use.

[0040] The present invention also provides a motor, including any one of the above-mentioned enameled wire and lead wire connection structures 100 for the motor. By adopting the enameled wire and lead wire connection structure 100, the quality of the motor is improved, and the reliability and service life of the motor are enhanced.

[0041] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of patent protection for the present invention shall be determined by the appended claims.

Claims

1. A connection structure between an enameled wire and a lead wire for a motor, characterized in that: The enameled wire and lead wire connection structure (100) comprises: The enameled wire (10) is set to be an aluminum enameled wire; The lead wire (20) is a copper wire, and the end of the enameled wire (10) is relatively independent from the end of the lead wire (20); A connection terminal (30) is connected to the end of the enameled wire (10) and the end of the lead wire (20) respectively, so that the enameled wire (10) and the lead wire (20) are electrically connected; An isolation tube (40) is attached to the outside of the connection terminal (30) to form a seal with respect to the connection terminal (30), the end of the enameled wire (10), and the end of the lead wire (20); An insulating sleeve (50) is sleeved outside the isolation tube (40), and a filling space (60) is formed between the isolation tube (40) and the insulating sleeve (50), and the filling space (60) is filled with filler.

2. The connection structure of the enameled wire and the lead wire for the motor according to claim 1, characterized in that: The space between the isolation tube (40) and the connection terminal (30) is filled with colloid.

3. The connection structure of the enameled wire and the lead wire for a motor according to claim 1, characterized in that: The filler includes resin, flame retardant, modified material and auxiliary materials.

4. The connection structure of the enameled wire and the lead wire for a motor according to claim 3, characterized in that: The resin includes at least one of polyesterimide resin, polyurethane, polyester resin, silicone resin, bismaleimide resin and epoxy resin.

5. The connection structure of the enameled wire and the lead wire for a motor according to claim 3, characterized in that: The modified material includes at least one of titanium dioxide, red iron oxide, carbon black, chrome yellow, mica powder, talc powder, barium sulfate, calcium carbonate and silicon dioxide.

6. The connection structure of the enameled wire and the lead wire for a motor according to claim 3, characterized in that: The flame retardant includes a reactive flame retardant and an additive flame retardant.

7. The connection structure of the enameled wire and the lead wire for a motor according to claim 1, characterized in that: The curing temperature of the filler is 135° C. to 145° C., and the curing time is 2 min to 5 min.

8. The connection structure of the enameled wire and the lead wire for a motor according to claim 1, characterized in that: Yarn is provided outside the insulating sleeve (50), and the yarn is wound around the insulating sleeve (50), the enameled wire (10) and the lead wire (20), so as to fix the insulating sleeve (50) relative to the isolation tube (40).

9. The connection structure of the enameled wire and the lead wire for a motor according to claim 1, characterized in that: The insulating sleeve (50) is configured as a glass fiber tube or a yellow wax tube, and the isolation tube (40) is configured as a heat shrink tube.

10. A motor, characterized in that: The invention comprises an enameled wire and lead wire connection structure (100) for a motor according to any one of claims 1 to 9.

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