Motor outgoing line sealing structure and motor

Abstract

The utility model provides a motor outgoing line sealing structure and a motor. The motor outgoing line sealing structure comprises a motor shell, a connecting boss, a junction box and a first sealing piece. A wire outlet hole is formed in the outer side surface of the motor shell; the connecting boss is arranged on the outer side face of the motor shell, and the wire outlet hole penetrates through the connecting boss; the surface of the junction box is tightly attached to the surface of the connecting boss. And the first sealing element is arranged around the periphery of the wire outlet hole and is clamped between the junction box and the connecting boss. The motor comprises the motor outgoing line sealing structure. According to the invention, through the arrangement of the connecting boss, the assembly process is simplified, and the assembly working hours of workers are reduced. The first sealing element is arranged around the periphery of the wire outlet hole and is clamped between the junction box and the connecting boss, external moisture, dust and other impurities can be effectively prevented from entering the motor from the wire outlet hole through the extrusion effect of the junction box and the connecting boss on the first sealing element, and the sealing protection performance of the motor is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric machines, and more particularly relates to an electric machine lead-out wire sealing structure and an electric machine. BACKGROUND

[0002] At present, customers have higher requirements for the sealing and protection performance of electric machines to cope with various harsh working environments.

[0003] In the sealing and protection system of a liquid-cooled servo motor, the sealing and protection of the lead-out wire position is always a relatively important and difficult link. Currently, a common liquid-cooled servo motor three-phase lead-out wire position usually has an interface box support seat added between the casing and the interface box for connecting the interface box and the motor casing. With the interface box support seat, the casing and the support seat need to be sealed, the interface box and the support seat also need to be sealed, and the support seat itself also needs to be set as a sealing member. In this way, on the one hand, the sealing positions are more, which will reduce the sealing and protection performance of the motor, and on the other hand, sealing materials and assembly man-hours also need to be increased. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiment of the application is to provide an electric machine lead-out wire sealing structure and an electric machine to solve the technical problem of poor sealing and protection performance of the motor main body and the interface box in the prior art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is to provide an electric machine lead-out wire sealing structure, comprising a motor casing, a connecting boss, an interface box and a first sealing member; the outer side surface of the motor casing is provided with a lead-out hole; the connecting boss is arranged on the outer side surface of the motor casing, and the lead-out hole penetrates through the connecting boss; the surface of the interface box is tightly combined with the surface of the connecting boss; and the first sealing member is arranged around the outer periphery of the lead-out hole and clamped between the interface box and the connecting boss.

[0006] Further, the surface of the connecting boss is provided with an annular groove, the annular groove is arranged around the outer periphery of the lead-out hole; and the first sealing member is arranged in the annular groove.

[0007] Further, the thickness of the first sealing member is greater than the depth of the annular groove.

[0008] Further, the connecting boss and the motor casing are an integral molding structure.

[0009] Further, the interface box and the connecting boss are connected through fasteners.

[0010] Further, the bottom of the terminal box is provided with a through hole, the connecting boss is provided with a threaded hole, and the fastener is screwed with the connecting boss at the threaded hole through the through hole.

[0011] Further, the terminal box is provided with a threading hole, the threading hole is communicated with the wire outlet hole, and the motor lead wire sealing structure further comprises a second sealing element, which is arranged at the threading hole.

[0012] Further, the outer side of the second sealing element has a groove that is clamped with the terminal box shell at the threading hole, the first groove side of the groove is abutted to the inner side of the shell of the terminal box, and the second groove side of the groove is abutted to the wire outlet hole side wall of the connecting boss.

[0013] Further, the diameter of the threading hole is smaller than the diameter of the wire outlet hole, and the height of the first groove side is greater than the height of the second groove side.

[0014] The application also provides a motor comprising the motor lead wire sealing structure.

[0015] The motor lead wire sealing structure and the motor provided by the application have the following beneficial effects:

[0016] (1) Compared with the prior art, in the application, the connecting boss not only enhances the structural strength of the motor shell, but also provides support for the installation of the first sealing element, so that the first sealing element can be stably installed between the motor shell and the terminal box, avoiding the inconvenience of the traditional gluing method, simplifying the assembly process and improving the operation convenience; and reducing the worker assembly time.

[0017] (2) Compared with the prior art, in the application, the first sealing element is arranged around the outer periphery of the wire outlet hole and clamped between the terminal box and the connecting boss, and through the extrusion of the terminal box and the connecting boss on the first sealing element, the external moisture, dust and other impurities entering the motor from the wire outlet hole can be effectively prevented, and the sealing protection performance of the motor is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 A cross-sectional structure schematic diagram of a motor lead wire sealing structure provided by the application;

[0020] Figure 2 As Figure 1 A local enlarged schematic view of the middle A;

[0021] Figure 3 An assembly cross-sectional view of the junction box and the second sealing element in the motor lead wire sealing structure provided by the embodiment of the present application;

[0022] Figure 4 An assembly perspective view of the junction box and the second sealing element in the motor lead wire sealing structure provided by the embodiment of the present application;

[0023] Figure 5 A cross-sectional structure schematic view of the junction box in the motor lead wire sealing structure provided by the embodiment of the present application;

[0024] Figure 6 A cross-sectional structure schematic view of the second sealing element in the motor lead wire sealing structure provided by the embodiment of the present application;

[0025] Figure 7 An assembly cross-sectional view of the motor shell and the connecting boss in the motor lead wire sealing structure provided by the embodiment of the present application;

[0026] Figure 8 An assembly perspective view of the motor shell and the connecting boss in the motor lead wire sealing structure provided by the embodiment of the present application.

[0027] In the drawings, various reference signs represent:

[0028] 100 - motor shell; 110 - lead hole;

[0029] 200 - connecting boss; 210 - annular groove; 220 - threaded hole;

[0030] 300 - junction box; 310 - through hole; 320 - wire hole;

[0031] 400 - first sealing element;

[0032] 500 - second sealing element; 510 - wire hole; 520 - groove. DETAILED DESCRIPTION

[0033] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clearer and more apparent, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed" or "set up" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0037] Please refer to Figure 1 and Figure 2 , the motor lead seal structure provided by the embodiment of the present application will be described. The motor lead seal structure comprises a motor shell 100, a connecting boss 200, a junction box 300 and a first sealing member 400; the outer side surface of the motor shell 100 is provided with a wire hole 110; the connecting boss 200 is arranged on the outer side surface of the motor shell 100, and the wire hole 110 penetrates through the connecting boss 200; the surface of the junction box 300 is tightly combined with the surface of the connecting boss 200; the first sealing member 400 is arranged around the outer periphery of the wire hole 110 and is clamped between the junction box 300 and the connecting boss 200; wherein the connecting boss 200 can be a boss welded on the outer side surface of the motor shell 100, or it can also be arranged on the outer side surface of the motor shell 100 by other ways, such as being casted and formed together with the motor shell 100.

[0038] Compared with the prior art, in the motor lead seal structure provided by the embodiment of the application, the connection boss 200 is arranged to enhance the structural strength of the motor shell 100 and provide support for the installation of the first sealing element 400, so that the first sealing element 400 can be stably installed between the motor shell 100 and the junction box 300, avoiding the inconvenience of the traditional gluing method, simplifying the assembly process and improving the convenience of operation; and reducing the assembly time of workers.

[0039] In an embodiment of the application, referring to Figure 7 and Figure 8 , the surface of the connection boss 200 is provided with an annular groove 210, and the annular groove 210 is arranged around the outer periphery of the lead hole 110, wherein the annular groove 210 has a preset distance from the lead hole 110; and the first sealing element 400 is arranged in the annular groove 210.

[0040] In the embodiment, the annular groove 210 is arranged to provide a more stable and clear installation position for the first sealing element 400, further enhancing the sealing effect. The design of the annular groove 210 can also ensure that the first sealing element 400 will not affect the sealing performance due to positional deviation during installation, thereby improving the reliability and stability of the sealing structure. In addition, the presence of the annular groove 210 can also increase the contact area between the first sealing element 400 and the connection boss 200 to some extent, enhance the tightness of the seal, further prevent external moisture, dust and other impurities from entering the motor interior from the lead hole 110, and ensure the normal operation of the motor.

[0041] In an embodiment of the application, the thickness of the first sealing element 400 is greater than the depth of the annular groove 210.

[0042] In the embodiment, the thickness of the first sealing element 400 is greater than the depth of the annular groove 210, which makes the first sealing element 400 partially protrude out of the annular groove 210 after installation, forming a more tight contact and extrusion between the first sealing element 400 and the junction box 300, thereby further improving the sealing effect. By ensuring that the first sealing element 400 has a certain amount of extrusion deformation after installation, external moisture, dust and other impurities can be more effectively prevented from penetrating into the motor interior through the sealing part, improving the protection level and reliability of the motor.

[0043] In an embodiment of the present application, the connecting boss 200 and the motor housing 100 are integrally formed.

[0044] In the present embodiment, the connecting boss 200 and the motor housing 100 are integrally formed, which not only improves the overall structure and stability, but also simplifies the production process and reduces the manufacturing cost. Through integral molding, there is no joint between the connecting boss 200 and the motor housing 100, avoiding the problems of water leakage, air leakage and other problems caused by poor sealing at the joint, further improving the sealing performance of the motor. At the same time, the integrally formed structure also enhances the structural strength of the motor housing 100, improves the durability and reliability of the motor.

[0045] In an embodiment of the present application, the junction box 300 and the connecting boss 200 are connected by fasteners.

[0046] In the present embodiment, the specific form of the fastener can be selected according to actual needs, such as bolts, screws, etc., to ensure that the connection between the junction box 300 and the connecting boss 200 is firm and reliable. Through fastener connection, not only is it convenient to disassemble and maintain, but also the tightness of the fastener can be adjusted according to actual needs, thereby further ensuring the sealing effect. In addition, the fastener connection method can also absorb and disperse the vibration and impact force during the operation of the motor to a certain extent, protect the sealing structure from being damaged, and prolong the service life of the motor.

[0047] In an embodiment of the present application, please refer to Figure 4 and Figure 8 , the bottom of the junction box 300 is provided with a through hole 310, and the connecting boss 200 is provided with a threaded hole 220, and the fastener passes through the through hole 310 and is screwed with the connecting boss 200 at the threaded hole 220.

[0048] In the present embodiment, the junction box 300 and the connecting boss 200 adopt the above-mentioned connection method, which is not only simple and convenient, but also reliable in fastening effect. The fastener is connected by screwing, which can ensure that the connection between the junction box 300 and the connecting boss 200 is firm and does not loosen, further improving the stability and reliability of the sealing structure. At the same time, the screw connection method is also convenient for disassembly and reinstallation, providing convenience for the maintenance and repair of the motor.

[0049] In an embodiment of the present application, please refer to Figure 5 , the junction box 300 is provided with a threading hole 320, and the threading hole 320 is in communication with the wire outlet hole 110; please refer to Figure 1 and Figure 3 , the motor lead-out wire sealing structure further comprises a second sealing member 500, and the second sealing member 500 is arranged at the threading hole 320, as shown in Figure 6 , the second sealing member 500 is provided with a wire binding hole 510 in the middle for the lead-out wire to pass through.

[0050] In this embodiment, by setting the second sealing member 500, the wire bundling hole 510 of the second sealing member 500 can only allow the lead-out wire to pass through, which can prevent foreign matter from falling into the motor during wiring, causing the motor to malfunction. At the same time, the setting of the second sealing member 500 can further enhance the sealing performance at the threading hole 320, preventing external moisture, dust and other impurities from entering the motor through the threading hole 320, and together with the first sealing member 400, forming a solid protective barrier, providing a strong guarantee for the stable operation of the motor.

[0051] Specifically, the shape of the wire bundling hole 510 can adopt a star-shaped, polygonal or other special-shaped structure. This design can increase the friction between the lead-out wire and the inner wall of the wire bundling hole 510, preventing the lead-out wire from loosening or falling off due to vibration during motor operation, further improving the reliability and safety of the motor. At the same time, the special-shaped wire bundling hole 510 can also limit the movement range of the lead-out wire to some extent, avoiding excessive bending or twisting of the lead-out wire inside the motor, thereby prolonging the service life of the lead-out wire.

[0052] In an embodiment of the present application, please refer to Figure 3 and Figure 6 The outer side of the second sealing member 500 has a groove 520, which is clamped with the junction box 300 at the threading hole 320. The groove 520 includes a first groove side, a groove bottom and a second groove side. The shell of the junction box 300 is clamped into the groove 520 along the first groove side and the second groove side and abuts against the groove bottom. The first groove side abuts against the inner side of the shell of the junction box, and the second groove side of the groove 520 abuts against the side wall of the lead-out hole 110 of the connecting boss 200. In this way, the sealing performance of the threading hole 320 and the lead-out hole 110 with the outside can be improved.

[0053] In this embodiment, the design of the groove 520 on the outer side of the second sealing member 500 not only facilitates the clamping and fixing between the second sealing member 500 and the junction box 300, but also enhances the stability and reliability of the sealing structure. The presence of the groove 520 allows the second sealing member 500 to be more firmly attached to the junction box 300 during installation, and is not easy to fall off or loosen, thereby ensuring the durability of the sealing effect. At the same time, the design of the groove 520 can also increase the contact area between the second sealing member 500 and the junction box 300 to some extent, improve the tightness of the sealing, further prevent external impurities from entering the motor through the threading hole 320, and ensure the normal operation of the motor. In addition, the clamping method of the groove 520 also facilitates the disassembly and replacement of the second sealing member 500, providing convenience for the maintenance and repair of the motor.

[0054] In one embodiment of the present application, the diameter of the threading hole 320 is smaller than the diameter of the outlet hole 110, and the first groove side height is greater than the second groove side height.

[0055] In the present embodiment, the diameter of the threading hole 320 is smaller than the diameter of the outlet hole 110, so that part of the edge of the threading hole 320 is located in the outlet hole 110, so that when the groove 520 of the second sealing member 500 is assembled with the junction box 300, the edge of the threading hole 320 can exert a certain extrusion on the second sealing member 500, further enhancing the sealing effect; and the first groove side height is greater than the second groove side height, so that the second groove side abuts against the outlet hole 110 side wall of the connecting boss 200, thereby forming a first resealing effect on the outlet hole 110, and at the same time, the first sealing member 400 arranged on the outer periphery of the outlet hole 110 can form a second resealing effect, which can further improve the sealing protection performance. At the same time, the design of the diameter of the threading hole 320 can also ensure that the lead-out wire does not shake due to too large gap when passing through, thereby improving the stability and safety of the lead-out wire.

[0056] The assembly process of the motor lead-out wire sealing structure provided in the present embodiment is as follows:

[0057] Step one: weld a connecting boss 200 at the outlet hole 110 of the motor housing 100, so that the motor housing 100 and the connecting boss 200 form an integral whole; the outlet hole 110 is sized as φ42, and a ring-shaped groove 210 is opened on the edge of the outlet hole 110 of the motor housing 100 for installing a first sealing member 400 (the first sealing member 400 can be an O-shaped sealing ring), which is used for sealing protection of the motor. As shown in Figure 7 and Figure 8 .

[0058] Step two: open a threading hole 320 slightly smaller than the diameter of the outlet hole 110 on the bottom surface of the junction box 300.

[0059] Step three: before assembling the junction box 300, install the second sealing member 500 at the threading hole 320 of the junction box 300, so that the groove 520 of the second sealing member 500 is buckled on the junction box 300, so that the second sealing gasket is not easy to fall off, thereby preventing foreign matter from falling into the motor during wiring. As shown in Figure 3 and Figure 6 .

[0060] Step four: install the first sealing member 400 in the ring-shaped groove 210, fix the junction box 300 on the connecting boss 200 by bolts, and the first sealing member 400 is extruded to play a sealing protection role. As shown in Figure 1 .

[0061] The present application also provides a motor, which comprises the above-mentioned motor lead-out wire sealing structure.

[0062] In this embodiment, the motor is sealed by the motor lead-out wire sealing structure described above, which not only improves the sealing performance of the motor, but also enhances the structural strength and durability of the motor. In actual application, the motor can effectively prevent external moisture, dust and other impurities from entering the motor, avoiding motor failure caused by impurities intrusion, and prolonging the service life of the motor. At the same time, the lead-out wire sealing structure of the motor is easy to assemble, which reduces the assembly time and cost of workers, and improves the production efficiency. In addition, the lead-out wire sealing structure of the motor also has good maintainability and repairability, which provides convenience for the subsequent use and maintenance of the motor.

[0063] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A sealing structure for motor lead wires, characterized in that, include: A motor housing, wherein a wire outlet hole is provided on the outer side of the motor housing; A connecting boss is provided on the outer side of the motor housing, and the wire outlet hole passes through the connecting boss. A junction box, the surface of which is in close contact with the surface of the connecting boss; A first sealing element is disposed around the outer periphery of the outlet hole and is clamped between the junction box and the connecting boss.

2. The motor lead wire sealing structure as described in claim 1, characterized in that, The surface of the connecting boss is provided with an annular groove, which surrounds the outer periphery of the outlet hole; the first sealing member is disposed within the annular groove.

3. The motor lead wire sealing structure as described in claim 2, characterized in that, The thickness of the first seal is greater than the depth of the annular groove.

4. The motor lead wire sealing structure as described in claim 1, characterized in that, The connecting boss and the motor housing are integrally formed.

5. The motor lead wire sealing structure as described in claim 1, characterized in that, The junction box and the connecting boss are connected by fasteners.

6. The motor lead wire sealing structure as described in claim 5, characterized in that, The junction box has a through hole at the bottom and a threaded hole on the connecting boss. The fastener passes through the through hole and is threadedly connected to the connecting boss at the threaded hole.

7. The motor lead wire sealing structure as described in any one of claims 1-6, characterized in that, The junction box is provided with a wire through hole, which is connected to the wire outlet hole; the motor lead wire sealing structure also includes a second sealing element, which is disposed at the wire through hole.

8. The motor lead wire sealing structure as described in claim 7, characterized in that, The outer surface of the second seal has a groove that engages with the junction box housing at the wire hole. The first groove side abuts against the inner side of the junction box housing, and the second groove side abuts against the side wall of the wire outlet hole of the connecting boss.

9. The motor lead wire sealing structure as described in claim 8, characterized in that, The diameter of the threading hole is smaller than the diameter of the outlet hole, and the height of the first groove side is greater than the height of the second groove side.

10. An electric motor, characterized in that, Includes the motor lead wire sealing structure as described in any one of claims 1-9.

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