Motor outgoing line sealing structure

Abstract

The utility model discloses a motor leading-out wire sealing structure which comprises a motor rear cover, a wire outlet plug and a leading-out wire, the motor rear cover is provided with a wire outlet, the wire outlet is sleeved with the wire outlet plug, the leading-out wire penetrates out of the wire outlet plug, the motor rear cover is provided with a cylindrical boss located at the wire outlet, and the cylindrical boss is sleeved with the wire outlet plug. The outer end of the outer side of the wire outlet plug is provided with a first annular sealing groove corresponding to the cylindrical boss, the inner end of the outer side of the wire outlet plug is provided with a third conical guide surface and a second annular positioning flange corresponding to the inner side of the wire outlet, and the inner side of the wire outlet plug is provided with an elastic sealing lip and an inner conical guide surface; and the outgoing line sequentially penetrates through the inner conical guide surface and the elastic sealing lip to extend out. According to the utility model, through the double-layer sealing structure design, the sealing protection of the wire outlet part is realized in a limited installation space, the motor wire outlet structure has the advantages of high sealing reliability, compact structure and convenient assembly, and the technical problem that the conventional motor wire outlet structure is easy to leak water is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor structure sealing technical field especially relates to a motor lead -out wire sealing structure. BACKGROUND

[0002] The sealing of motor lead -out wire is an important component of motor.

[0003] The existing patent CN222508969U name " a lead -out wire waterproof structure of middle -position motor", main include casing, end cover, rubber plug fixed cover, rubber plug and a plurality of lead -out wire, its characterized by: end cover cover is established on the casing, rubber plug is installed on the casing or end cover through rubber plug fixed cover, the end of lead -out wire is arranged in rubber plug. The inner circumferential surface of rubber plug is provided with a plurality of annular protrusions, which are in compression with the lead -out wire to realize sealing. The outer side of the rubber plug is provided with a first circular ring and a plurality of annular protrusions, the first circular ring is used for positioning, and the plurality of annular protrusions are used for sealing.

[0004] Its insufficient place: 1, the plurality of annular protrusions of the inner hole, make the threading resistance big. 2, the sealing effect is poor, due to the die processing error and injection error, so that the interference amount of each annular protrusion is inconsistent, and the actual sealing ring is not much. And because the cross section shape is circular, the interference contact area is small. 3, the structure is complex, the cost is high, needs the rubber plug fixed cover, O ring, installs screw and many parts. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the utility model designs a motor lead -out wire sealing structure aiming at the shortcomings of big threading resistance, poor sealing effect and complex structure.

[0006] The utility model adopts the following technical scheme:

[0007] A kind of motor lead -out wire sealing structure, including motor rear cover, wire outlet plug and lead -out wire, wire outlet is set in motor rear cover, wire outlet plug is sleeved on wire outlet, lead -out wire is passed out on wire outlet plug, the cylindrical boss is set in motor rear cover at wire outlet, the first annular sealing groove is set in the outer end of wire outlet plug outside corresponding cylindrical boss, the third conical guide surface and the second annular positioning flange are set in the inner end of wire outlet plug outside corresponding wire outlet inner side, wire outlet plug inner side is provided with elastic sealing lip and inner conical guide surface, lead -out wire is successively passed through inner conical guide surface and elastic sealing lip and extends.

[0008] As preferred, the inner conical guide surface and elastic sealing lip are conical surfaces with a large inner diameter and a small outer diameter, and the elastic sealing lip is connected to the inner conical guide surface.

[0009] As preferred, the lip diameter of the elastic sealing lip is smaller than the diameter of the lead -out wire, so that the elastic sealing lip and the outer surface of the lead -out wire form a compression seal.

[0010] Preferably, the inner tapered guide surface and the third tapered guide surface are transitioned by a rounded corner, which facilitates the exit of the lead wire.

[0011] Preferably, the outer edge of the cylindrical boss is rounded to facilitate the first annular sealing groove covering the cylindrical boss.

[0012] Preferably, the lead plug is integrally molded from an elastic material. This facilitates mass production and saves costs.

[0013] Preferably, the elastic material body is made of silicone, latex, or rubber.

[0014] The beneficial effects of this utility model are: (1) The elastic sealing lip reduces the resistance of threading, and the interference contact area is a length, which has a large interference contact area and a good sealing effect; (2) The double sealing of the inner and outer surfaces ensures the sealing effect; (3) The separate wire plug achieves sealing, reduces the number of parts, is easy to assemble, has a simple structure, and reduces costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional schematic diagram of this utility model;

[0017] Figure 3 This is a schematic diagram of the wire outlet plug structure in this utility model;

[0018] Figure 4 This is a schematic diagram of the motor rear cover structure in this utility model;

[0019] In the diagram: 1. Motor rear cover; 2. Outlet plug; 3. Lead wire; 4. First annular sealing groove; 5. Second annular positioning flange; 6. Third conical guide surface; 7. Elastic sealing lip; 8. Inner conical guide surface; 9. Cylindrical boss. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0021] Example: Figures 1-4 As shown, a motor lead wire sealing structure includes a motor rear cover 1, a lead wire plug 2, and a lead wire 3. A first annular sealing groove 4, a second annular positioning flange 5, and a third conical guide surface 6 are provided on the outer side of the lead wire plug 2. An elastic sealing lip 7 and an inner conical guide surface 8 are provided on the inner side of the lead wire plug 2. A cylindrical boss 9 is provided on the motor rear cover 1. The lead wire plug 2 is installed on the lead wire outlet of the motor rear cover 1. Then, the lead wire 3 is pulled and passed through the lead wire plug 2 from the inside to the outside, achieving sealing on both the inner and outer sides of the lead wire plug 2.

[0022] The inner conical guide surface 8 and the elastic sealing lip 7 are conical surfaces with large inner diameter and small outer diameter, and the elastic sealing lip 7 communicates with the inner conical guide surface 8. The lip diameter of the elastic sealing lip 7 is smaller than the diameter of the lead-out wire. The inner conical guide surface 8 is connected with the third conical guide surface 6 through a round corner transition. The outer edge of the cylindrical boss 9 is connected through a round corner transition. The lead-out plug 2 is integrally formed by rubber injection molding.

[0023] During the installation of the lead-out plug 2 on the lead-out port of the motor rear cover 1, the third conical guide surface 6 on the outer side of the lead-out plug 2 plays a guiding role, and then the first annular sealing groove 4 on the outer side of the lead-out plug 2 encloses the cylindrical boss 9 on the motor rear cover 1 to form an interference fit to achieve sealing, and at the same time, an axial positioning fit is formed to prevent the lead-out plug 2 from entering, and then the second annular positioning flange 5 on the outer side of the lead-out plug 2 forms an axial positioning fit with the inner side end face of the lead-out port of the motor rear cover 1 to prevent the lead-out plug from coming out.

[0024] During the process that the lead-out wire 3 passes through the lead-out plug 2, the elastic sealing lip 7 on the inner side of the lead-out plug 2 forms a compression seal with the outer surface of the lead-out wire 3, and the inner conical guide surface 8 facilitates the guidance of the lead-out wire 3 to pass through.

[0025] The above-described embodiments are only a preferred scheme of the present application, and do not limit the present application in any form. Other variants and modifications can be made without exceeding the technical scheme recited in the claims.

Claims

1. A motor lead seal structure, comprising a motor rear cover (1), a lead plug (2) and a lead wire (3), a lead hole is formed on the motor rear cover (1), the lead plug (2) is sleeved on the lead hole, the lead wire (3) is led out from the lead plug (2), characterized in that, The motor rear cover (1) is provided with a cylindrical boss (9) on the wire outlet, the outer end of the wire outlet plug (2) is provided with a first annular sealing groove (4) corresponding to the cylindrical boss (9), the inner end of the wire outlet plug (2) is provided with a third tapered guide surface (6) and a second annular positioning flange (5) corresponding to the inner side of the wire outlet, the inner side of the wire outlet plug (2) is provided with an elastic sealing lip (7) and an inner tapered guide surface (8), and the lead-out wire (3) extends out through the inner tapered guide surface (8) and the elastic sealing lip (7) in sequence.

2. A motor lead seal as claimed in claim 1, wherein, The inner tapered guide surface (8) and the elastic sealing lip (7) are tapered surfaces with the inside larger than the outside, and the elastic sealing lip (7) is communicated with the inner tapered guide surface (8).

3. The motor lead seal of claim 1, wherein, The lip diameter of the elastic sealing lip (7) is smaller than the diameter of the lead-out wire (3).

4. The motor lead seal of claim 1, wherein, The inner tapered guide surface (8) and the third tapered guide surface (6) are connected through a round corner.

5. The motor lead seal of claim 1, wherein, The outer edge of the cylindrical boss (9) is connected through a round corner.

6. The motor lead seal of claim 1, wherein, The wire outlet plug (2) is integrally formed by injection molding of an elastic material body.

7. A motor lead seal according to claim 6, wherein, The elastic material body is made of silica gel, latex or rubber.

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