A self-locking plug

Abstract

The present invention relates to the technical field of electrical connectors, and is a self-locking plug, comprising a plug housing 1, a connecting nut 2, a clamping gasket 3, a spring, a clamping nut 5, a contact piece and an insulator assembly 7. An annular first boss 101 is provided on the outer ring surface of the middle section of the plug housing 1, the connecting nut 2 is sleeved on the plug housing 1, and an annular second boss 201 is provided on the inner wall of the middle section of the connecting nut 2. A spring and a clamping gasket 3 are provided between the clamping nut 5 and the first boss 101. A first anti-loosening tooth 1011 arranged around the end surface of the first boss 101 close to the clamping nut 5 is provided, and a second anti-loosening tooth 301 arranged around the end surface of the clamping gasket 3 abutting against the first boss 101 is provided. The clamping nut 5 and the spring are squeezed to form a self-locking state by squeezing the first anti-loosening tooth 1011 and the second anti-loosening tooth 301 meshing with each other, and the self-locking state has the advantages of large separation torque and good sealing performance.

Description

Technical Field

[0001] The invention relates to the technical field of electrical connectors, and in particular to a self-locking plug. Background Art

[0002] In order to improve the connection performance of threaded electrical connector products and ensure that the connector plug and socket remain reliably connected under environments such as vibration and impact, it is necessary to implement the product's anti-loosening function by adding an external fuse or tightening pins after the plug and socket are connected. The above operation methods are relatively complicated and cumbersome. Therefore, there is an urgent need for a self-locking plug with a simple structure, easy operation, and relying on its own mechanical structure to ensure reliable connection after the product is docked. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a self-locking plug, which has the advantages of large separation torque and good sealing performance.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a self-locking plug, including a plug housing, a connecting nut, a clamping gasket, a spring, a clamping nut, a contact and an insulator assembly, the plug housing body is tubular, an insulator assembly and a contact for realizing electrical signal connection are installed in the plug housing, an annular first boss is provided on the outer ring surface of the middle section of the plug housing, the connecting nut is sleeved on the plug housing, the connecting nut body is tubular, and an annular second boss is provided on the inner wall of the middle section of the connecting nut, the first boss abuts with the second boss, the clamping nut is threadedly connected to the tail end of the connecting nut, a spring and a clamping gasket are arranged between the clamping nut and the first boss, a first anti-loosening tooth arranged around the end face of the first boss close to the clamping nut side is provided, and a second anti-loosening tooth arranged around the end face of the clamping gasket is provided on the end face abutting with the first boss, and self-locking is formed by squeezing the first anti-loosening tooth and the second anti-loosening tooth engaged by the clamping nut and the spring.

[0005] Preferably, the contact piece is a jack assembly, and the jack assembly comprises a jack and a protective cover installed on the jack.

[0006] Preferably, the spring is a disc spring, and the disc spring is located between the compression gasket and the compression nut.

[0007] Preferably, the insulator assembly includes an interface seal, a front insulator, a rear insulator and a wire sealing body arranged along the axial direction of the socket shell, the jack assembly is fixed in the insulator assembly by a claw, a first keyway is provided on the insulator assembly, a second keyway is provided on the inner wall of the plug shell, and the insulator assembly prevents the insulator assembly from rotating by cooperating with the second keyway through a key bonded in the first keyway.

[0008] Preferably, three positioning keys are evenly spaced on the outer ring surface of the compression gasket, and three corresponding keyways are provided on the outer ring surface of the compression nut, and the positioning keys of the compression gasket are respectively placed in the keyways of the compression nut.

[0009] Preferably, a shielding ring is further provided between the plug housing and the connecting nut.

[0010] Preferably, a first annular groove is provided on the first boss, and a rubber ring is provided in the first annular groove.

[0011] Preferably, the plug housing is provided with a second annular groove at the connection between the plug housing and the clamping nut, and a sealing ring is provided in the second annular groove.

[0012] Preferably, a friction gasket is provided between the first boss and the second boss.

[0013] Preferably, a third boss is provided on the plug housing, and the third boss is used to limit the axial position of the compression nut.

[0014] The beneficial effects of using the present invention are as follows: the present invention determines the compression amount of the disc spring through the cooperation between the clamping nut and the connecting nut, and at the same time the disc spring applies pressure between the clamping gasket and the plug housing, so that the first anti-loosening teeth on the plug housing and the second anti-loosening teeth on the clamping gasket engage with each other, thereby realizing the self-locking function of the product; by using a rubber ring installed in the first boss ring groove and an upper sealing ring in the second boss ring groove, the two are radially matched with the connecting nut and the clamping nut respectively, thereby enhancing the sealing of the plug; by installing a friction gasket between the plug housing and the connecting nut, the wear of the housing and the connecting nut when the plug is connected and separated is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the insulator assembly of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the jack assembly of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the plug housing of the present invention;

[0019] Figure 5 It is a structural schematic diagram of the compression gasket of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the compression nut of the present invention;

[0021] Figure 7It is a structural schematic diagram of the disc spring of the present invention;

[0022] Reference numerals include:

[0023] 1-plug housing, 101-first boss, 1011-first anti-loosening tooth, 102-third boss, 2-connecting nut, 201-second boss, 3-compression gasket, 301-second anti-loosening tooth, 302-positioning key, 4-disc spring, 5-compression nut, 501-keyway, 6-jack, 61-protective cover, 7-insulator assembly, 71-interface sealing body, 72-front insulator, 73-rear insulator, 74-sealing body, 8-shielding ring, 9-rubber ring, 10-sealing ring, 11-friction gasket, 12-claw, 13-key. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-Figure 7 As shown, a self-locking plug includes a plug housing 1, a connecting nut 2, a compression gasket 3, a spring, a compression nut 5, a contact and an insulator assembly 7. The main body of the plug housing 1 is tubular, and the insulator assembly 7 and the contact for realizing electrical signal connection are installed in the plug housing 1. An annular first boss 101 is provided on the outer ring surface of the middle section of the plug housing 1, and the connecting nut 2 is sleeved on the plug housing 1. The main body of the connecting nut 2 is tubular, and the inner wall of the middle section of the connecting nut 2 has an annular second boss 201. The first boss 101 abuts against the second boss 201, and the compression nut 5 is threadedly connected to At the tail end of the connecting nut 2, a spring and a clamping gasket 3 are arranged between the clamping nut 5 and the first boss 101. A plurality of first anti-loosening teeth 1011 are arranged around the end face of the first boss 101 close to the clamping nut 5. The clamping gasket 3 is provided with a plurality of second anti-loosening teeth 301 arranged around the end face on its end face abutting against the first boss 101. The second anti-loosening teeth 301 and the first anti-loosening teeth 1011 are inserted into each other's inter-tooth gaps, and self-locking is formed by squeezing the first anti-loosening teeth 1011 and the second anti-loosening teeth 301 that are meshed with the clamping nut 5 and the spring. When the clamping nut 5 is tightened, the disc spring 7 in the clamping nut 5 is squeezed between the first boss 101 and the clamping nut 5, so that the disc spring 7 gives thrust to the clamping gasket 5, thereby making the clamping gasket fit tightly with the first boss 101, and the first anti-loosening tooth 1011 and the second anti-loosening tooth 301 are more tightly meshed. Through the different angles on both sides of the anti-loosening teeth, the effect of small connection torque and large separation torque is achieved, thereby realizing the self-locking function of the plug.

[0026] The contact piece is a socket assembly, which includes a socket 6 and a protective cover 61 installed on the socket 6. The protective cover 61 is used to prevent contact bodies of different specifications from being mis-inserted during docking.

[0027] The spring is a disc spring 4, which is located between the compression gasket 3 and the compression nut 5. In other embodiments, other springs with equivalent functions can be used.

[0028] The insulator assembly 7 includes an interface sealing body 71, a front insulator 72, a rear insulator 73 and a sealing body 74 arranged along the axial direction of the socket shell. The jack 6 assembly is fixed in the insulator assembly 7 by a claw 12. A first keyway is provided on the insulator assembly 7, and a second keyway is provided on the inner wall of the plug shell 1. The insulator assembly 7 prevents the insulator assembly 7 from rotating by cooperating with the second keyway through a key 13 bonded in the first keyway.

[0029] The outer ring surface of the compression gasket 3 is provided with three positioning keys 302 at equal intervals, and the outer ring surface of the compression nut 5 is provided with three corresponding keyways 501, and the positioning keys 302 of the compression gasket 3 are respectively placed in the keyways 501 of the compression nut 5. This design facilitates the positioning of the compression gasket 3 and the compression nut 5, and at the same time, the axial and radial positions of the compression gasket 3 are fixed by the cooperation between the positioning keys 302 and the keyways 501.

[0030] A shielding ring 8 is further provided between the plug housing 1 and the connecting nut 2 , and the shielding ring 8 improves the shielding performance of the product.

[0031] A first annular groove is provided on the first boss 101, and a rubber ring 9 is provided in the first annular groove to increase the sealing performance of the plug.

[0032] The plug housing 1 is provided with a second annular groove at the connection between the plug housing 1 and the compression nut 5 , and a sealing ring 10 is provided in the second annular groove to increase the sealing performance of the plug.

[0033] A friction pad 11 is disposed between the first boss 101 and the second boss 201 to prevent the contact surfaces of the first boss 101 and the second boss 201 from being worn when the plug is connected or disconnected.

[0034] A third boss 102 is provided on the plug housing 1, and the third boss 102 is used to limit the axial position of the clamping nut 5. At the same time, the distance between the clamping nut 5 and the first boss 101 can be measured after the clamping nut 5 and the connecting nut 2 are tightened, so as to facilitate setting the specification parameters of the clamping gasket 3 and the disc spring 4.

[0035] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A self-locking plug, characterized in that: The invention comprises a plug housing (1), a connecting nut (2), a pressing gasket (3), a spring, a pressing nut (5), a contact piece and an insulator assembly (7); the main body of the plug housing (1) is tubular; the insulator assembly (7) and the contact piece for realizing electrical signal connection are installed in the plug housing (1); an annular first boss (101) is provided on the outer ring surface of the middle section of the plug housing (1); the connecting nut (2) is sleeved on the plug housing (1); the main body of the connecting nut (2) is tubular; the inner wall of the middle section of the connecting nut (2) is provided with an annular second boss (201); the first boss (101) and the second boss (201) are connected to each other. ), the clamping nut (5) is threadedly connected to the rear end of the connecting nut (2), a spring and a clamping gasket (3) are arranged between the clamping nut (5) and the first boss (101), the end face of the first boss (101) close to the clamping nut (5) is provided with a first anti-loosening tooth (1011) arranged around the end face, and the clamping gasket (3) is provided with a second anti-loosening tooth (301) arranged around the end face on the end face abutting against the first boss (101), and the first anti-loosening tooth (1011) and the second anti-loosening tooth (301) meshed with the spring are squeezed to form a self-locking; The contact piece is a socket assembly, and the socket assembly comprises a socket (6) and a protective cover (61) installed on the socket (6); The spring is a disc spring (4), and the disc spring (4) is interposed between the compression gasket (3) and the compression nut (5); the insulator assembly (7) comprises an interface sealing body (71), a front insulator (72), a rear insulator (73) and a sealing body (74) arranged along the axial direction of the socket housing; the jack assembly is fixed in the insulator assembly (7) by means of a claw (12); a first keyway is arranged on the insulator assembly (7), and a second keyway is arranged on the inner wall of the plug housing (1); the insulator assembly (7) prevents the insulator assembly (7) from rotating by cooperating with the second keyway through a key (13) bonded in the first keyway; The outer ring surface of the compression gasket (3) is provided with three positioning keys (302) at equal intervals, and the outer ring surface of the compression nut (5) is provided with three corresponding keyways (501), and the positioning keys (302) of the compression gasket (3) are respectively placed in the keyways (501) of the compression nut (5); The first boss (101) is provided with a first annular groove, and a rubber ring (9) is arranged in the first annular groove; The plug housing (1) is provided with a second annular groove at the connection between the plug housing and the clamping nut (5), and a sealing ring (10) is provided in the second annular groove; A friction pad (11) is provided between the first boss (101) and the second boss (201); The plug housing (1) is provided with a third boss (102), and the third boss (102) is used to limit the axial position of the pressing nut (5).

2. The self-locking plug according to claim 1, characterized in that: A shielding ring (8) is also provided between the plug housing (1) and the connecting nut (2).

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