Plug-in type connection structure of junction box cover

Abstract

The invention discloses a plug-in connection structure of a junction box cover in the technical field of compressors. The plug-in connection structure comprises an upper shell cover; the binding post is installed on the upper shell cover, and an annular groove is formed between the binding post and the upper shell cover; the elastic sealing gasket is arranged on the outer side of the binding post in a sleeving mode, and the elastic sealing gasket is contained in the annular groove; the bottom end of the junction box cover is sleeved on the outer side of the binding post; the annular flanges are formed at the bottom end of the junction box cover, the annular flanges are arranged at intervals in the radial direction, and the bottom ends of the annular flanges extrude the elastic sealing gasket and are inserted into the bottom of the annular groove. According to the junction box, sealing between the binding post and the upper shell cover is achieved, friction force between the junction box cover and the binding post and friction force between the junction box cover and the upper shell cover are increased, and then the stability of connection between the junction box cover and the binding post is improved.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a wiring box cover plug-in connection structure. Background Art

[0002] Before the compressor leaves the manufacturer's factory and is installed on the refrigeration equipment, the compressor's terminals (also called wiring terminals) need to be properly protected to prevent the fragile glass in the terminals from cracking or breaking due to impact and other factors, and to prevent the terminals from deforming due to impact.

[0003] like Figure 4 As shown, in the prior art, the terminal 2 is generally protected by a terminal box cover 4, and the terminal 2 is mounted on the upper shell cover 1 of the compressor. The bottom end of the terminal 2 protrudes from the surface of the upper shell cover 1 to form a connecting boss, and the bottom end of the terminal box cover 4 is sleeved on the connecting boss and fixedly connected by interference fit. However, the height of the connecting boss of the terminal 2 protruding from the upper shell cover 1 is relatively small, resulting in a shorter mounting mating surface between the terminal box cover 4 and the connecting boss, making it easier for the terminal box cover 4 to fall off during transportation or handling, thereby causing the protection of the terminal 2 to fail.

[0004] Therefore, how to improve the connection stability between the junction box cover and the terminal post has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a plug-in connection structure for a junction box cover to solve the technical problem of poor connection stability between the existing junction box cover and the terminal post.

[0006] The technical solution adopted by the present invention is: a plug-in connection structure of a junction box cover, comprising:

[0007] An upper shell cover, wherein the upper shell cover is provided with a mounting hole;

[0008] A terminal, the terminal is installed in the mounting hole, and an annular groove is formed between the terminal and the upper shell cover;

[0009] A junction box cover, the bottom end of which is sleeved on the outside of the terminal post;

[0010] An annular flange, the annular flange being formed at the bottom end of the junction box cover;

[0011] When the junction box cover extends into the annular groove, the annular flange is deformed and inserted into the bottom of the annular groove.

[0012] Preferably, the inner diameter of the junction box cover is equal to the outer diameter of the terminal post, and the tolerance of the inner diameter of the junction box cover is ±0.5 mm.

[0013] Preferably, the tolerance of the inner diameter of the junction box cover is ±0.2 mm.

[0014] Preferably, the annular flange is multi-layered, and the multi-layer annular flange is arranged at intervals along the radial direction.

[0015] Preferably, the number of the annular flanges is 2 to 5 layers, and the radial thickness of each layer of the annular flanges is 0.1 to 0.5 mm.

[0016] Preferably, the annular flange and the junction box cover are integrally formed, and the annular flange and the junction box cover are made of plastic.

[0017] Preferably, the annular flange and the junction box cover are made of elastic plastic or a composite material of rubber and plastic.

[0018] Preferably, it also includes an elastic sealing pad, which is accommodated in the annular groove. The elastic sealing pad is sleeved on the outside of the terminal, and the elastic sealing pad is squeezed when the annular flange is inserted into the annular groove.

[0019] Preferably, it also includes an elastic sealing pad, which is adhered to the side wall of the annular flange and squeezes the elastic sealing pad when the annular flange is inserted into the annular groove.

[0020] Preferably, the elastic sealing pad has a thickness of 0.1 to 0.3 mm.

[0021] Preferably, the elastic sealing pad is provided with a protruding annular lip.

[0022] Preferably, the surface of the elastic sealing pad is provided with micro textures or protrusions.

[0023] Preferably, the elastic sealing pad is made of rubber or silicone.

[0024] Preferably, the mounting hole is provided with an inner flange.

[0025] Beneficial effects of the present invention:

[0026] The present invention adopts an interference fit + plug-in connection method, a multi-layer annular flange is fixedly connected to the bottom end of the junction box cover, and an elastic sealing gasket is placed in the annular groove between the terminal post and the upper shell cover. When the junction box cover is downwardly sleeved on the outer side of the terminal post, the annular flange moves downward with the junction box cover and squeezes the elastic sealing gasket, so that the annular flange and the elastic sealing gasket are deformed and inserted into the bottom of the annular groove, so that the annular flange and the elastic sealing gasket are filled and clamped to the bottom of the annular groove, which not only realizes the sealing between the terminal post and the upper shell cover, but also increases the friction between the junction box cover and the terminal post and the upper shell cover, thereby improving the stability of the connection between the junction box cover and the terminal post. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the plug-in connection structure of the junction box cover of the present invention;

[0028] Figure 2 for Figure 1 A partial enlarged view in FIG.

[0029] Figure 3 This is a schematic diagram of the junction box cover installation process;

[0030] Figure 4 The figure is a schematic diagram of the connection between the existing junction box cover and the terminal.

[0031] Description of reference numerals in the figures:

[0032] 1. Upper shell cover; 2. Terminal post; 3. Elastic sealing gasket; 4. Terminal box cover; 5. Annular flange; 6. Annular groove; 7. Annular lip. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0037] Examples, such as Figure 1 , Figure 2and Figure 3 As shown, a wiring box cover plug-in connection structure comprises: an upper shell cover 1, a terminal post 2, a wiring box cover 4 and an annular flange 5; a mounting hole is formed on the upper shell cover 1, the terminal post 2 is installed in the mounting hole of the upper shell cover 1, and an annular groove 6 is formed between the terminal post 2 and the upper shell cover 1; the bottom end of the wiring box cover 4 is sleeved on the outside of the terminal post 2, the annular flange 5 is formed at the bottom end of the wiring box cover 4, and when the wiring box cover 4 extends into the annular groove 6, the annular flange 5 is deformed and inserted into the bottom of the annular groove 6.

[0038] The present invention adopts an interference fit + plug-in connection method, and an annular flange 5 is fixedly connected to the bottom end of the junction box cover 4. In the process of downwardly sleeved the junction box cover 4 on the outside of the terminal post 2, the annular flange 5 can move downward with the junction box cover 4 and be inserted into the bottom of the annular groove 6 while changing shape, so that the annular flange 5 is filled and clamped on the bottom of the annular groove 6, which not only realizes the sealing between the terminal post 2 and the upper shell cover 1, but also increases the friction between the junction box cover 4 and the terminal post 2 and the upper shell cover 1, thereby improving the stability of the connection between the junction box cover 4 and the terminal post 2.

[0039] Specific embodiment 1, as Figure 1 , Figure 2 and Figure 3 As shown, a junction box cover plug-in connection structure comprises: an upper shell cover 1, a terminal post 2, an elastic sealing pad 3, a junction box cover 4 and an annular flange 5.

[0040] Wherein, a mounting hole is opened on the upper shell cover 1.

[0041] The terminal 2 is installed in the installation hole on the upper shell cover 1, and an annular groove 6 is formed between the terminal 2 and the upper shell cover 1. The radial dimension of the annular groove 6 gradually decreases from top to bottom.

[0042] The elastic sealing pad 3 is sleeved on the outside of the terminal 2, and the outer diameter of the elastic sealing pad 3 is smaller than the outer diameter of the annular groove 6, and the inner diameter of the elastic sealing pad 3 is larger than the outer diameter of the terminal 2, so that the elastic sealing pad 3 can be accommodated in the annular groove 6, and the thickness of the elastic sealing pad 3 is 0.1mm~0.3mm.

[0043] Preferably, an annular lip 7 protrudes from the elastic sealing gasket 3, that is, an annular lip 7 is integrally formed on the upper surface of the elastic sealing gasket 3, the annular lip 7 is coaxially arranged with the elastic sealing gasket 3, and the annular lip 7 is located at the outer end of the elastic sealing gasket 3, that is, the annular lip 7 is located at the end of the elastic sealing gasket 3 away from the terminal 2.

[0044] More preferably, both the upper surface and the lower surface of the elastic sealing pad 3 are provided with micro-textures or protrusions to increase the friction between the elastic sealing pad 3 and the upper shell cover 1 , and to increase the friction between the elastic sealing pad 3 and the terminal 2 .

[0045] More preferably, the elastic sealing pad 3 is made of rubber or silicone, so that the elasticity of the elastic sealing pad 3 is better than that of the annular flange 5, and the compression deformation of the elastic sealing pad 3 is large, so that the elastic sealing pad 3 can be deformed under the extrusion of the annular flange 5 and inserted into the annular groove 6.

[0046] The bottom end of the junction box cover 4 is sleeved on the outside of the terminal post 2, and the inner diameter of the junction box cover 4 is equal to the outer diameter of the terminal post 2, and the tolerance of the inner diameter of the junction box cover 4 is ±0.5mm, so that the bottom end of the junction box cover 4 and the connecting boss of the terminal post 2 are fixedly connected by friction, and the height of the junction box cover 4 is 2mm to 3mm higher than the height of the terminal post 2, that is, the distance between the top of the junction box cover 4 and the top of the terminal post 2 is 2mm to 3mm.

[0047] Preferably, the tolerance of the inner diameter of the junction box cover 4 is ±0.2 mm.

[0048] More preferably, the tolerance of the inner diameter of the junction box cover 4 and the outer diameter of the terminal post 2 needs to be precisely controlled to make the two fit more closely, while ensuring that the surface roughness of the junction box cover 4 and the annular groove 6 is within a suitable range, such as Ra 0.8-1.6 μm.

[0049] Specific embodiment 2, as Figure 1 , Figure 2 and Figure 3 As shown, a junction box cover plug-in connection structure comprises: an upper shell cover 1, a terminal post 2, an elastic sealing pad 3, a junction box cover 4 and an annular flange 5.

[0050] Wherein, a mounting hole is opened on the upper shell cover 1.

[0051] Preferably, the mounting hole is provided with an inner flange, that is, a flange extending toward the interior of the upper shell cover 1 is formed on the peripheral side of the mounting hole.

[0052] The terminal 2 is installed in the installation hole on the upper shell cover 1, and an annular groove 6 is formed between the terminal 2 and the upper shell cover 1. The radial dimension of the annular groove 6 gradually decreases from top to bottom.

[0053] The bottom end of the junction box cover 4 is sleeved on the outside of the terminal post 2, and the inner diameter of the junction box cover 4 is equal to the outer diameter of the terminal post 2, and the tolerance of the inner diameter of the junction box cover 4 is ±0.5mm, so that the bottom end of the junction box cover 4 and the connecting boss of the terminal post 2 are fixedly connected by friction, and the height of the junction box cover 4 is 2mm to 3mm higher than the height of the terminal post 2, that is, the distance between the top of the junction box cover 4 and the top of the terminal post 2 is 2mm to 3mm.

[0054] The number of the annular flange 5 is one layer or more layers, and the annular flange 5 is integrally formed at the bottom end of the junction box cover 4, that is, the annular flange 5 extends along the axial direction of the junction box cover 4; when the number of the annular flange 5 is multiple layers, the multiple layers of the annular flange 5 are spaced apart in the radial direction of the junction box cover 4.

[0055] The elastic sealing pad 3 is pasted on the side wall of the annular flange 5, that is, the elastic sealing pad 3 is pasted on the inner circumference or the outer circumference of each annular flange 5, and in the process of the junction box cover 4 being sleeved on the top of the terminal post 2, the annular flange 5 can squeeze the elastic sealing pad 3 and deform while inserting into the bottom of the annular groove 6, that is, in the process of extending the junction box cover 4 into the annular groove 6, the annular flange 5 can squeeze the elastic sealing pad 3 and deform while inserting into the bottom of the annular groove 6.

[0056] Preferably, the number of the annular flanges 5 is 2 to 5 layers, and the radial thickness of each layer of the annular flanges 5 is 0.1 mm to 0.5 mm. In a natural state, the sum of the radial thicknesses of all the annular flanges 5 is greater than the width of the bottom of the annular groove 6, so that during installation, the annular flanges 5 can be elastically deformed under the action of external force and enter the bottom of the annular groove 6, and the annular flanges 5 can rely on their own elastic restoring force to tightly clamp at the bottom of the annular groove 6; the top end of the annular flange 5 is fixedly connected to the bottom end of the junction box cover 4, and the material of the annular flange 5 and the junction box cover 4 is a lightweight and strong plastic material, such as ABS, so as to have good mechanical properties and cost-effectiveness.

[0057] Preferably, the annular flange 5 and the junction box cover 4 are made of elastic plastic or a composite material of rubber and plastic.

[0058] The installation process of the connection structure of the present invention is as follows:

[0059] First, put the elastic sealing gasket 3 into the bottom of the annular groove 6, then align the junction box cover 4 with the annular groove 6, press the junction box cover 4 downward, and make the junction box cover 4 slowly move downward along the guide slope (outer wall of the annular groove 6), and the annular flange 5 at the bottom end of the junction box cover 4 squeezes the elastic sealing gasket 3 while moving downward, and the annular flange 5 elastically deforms and enters the annular groove 6. At the same time, the annular flange 5 presses the annular lip 7 of the elastic sealing gasket 3, so that the annular flange 5 relies on its own elastic restoring force to be tightly stuck in the annular groove 6, and the installation is completed without the help of additional tools.

[0060] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0061] Through the elastic deformation of the annular flange and the elastic sealing gasket in the annular groove, and the friction connection between the terminal box cover and the terminal post, the stability of the connection between the terminal box cover and the terminal post is improved, and it can effectively resist various external force interferences, such as vibration and collision during the operation of the compressor.

[0062] The junction box cover is made of common plastic material, and the elastic sealing gasket is made of silicone material, which will not significantly increase the material cost and manufacturing cost, thus maintaining the economic advantage.

[0063] The installation process of the junction box cover is simple and quick, without the need for complicated operations and tools, making it easy to assemble efficiently on the production line.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A plug-in connection structure for a junction box cover, characterized in that: include: An upper shell cover (1), wherein the upper shell cover (1) is provided with a mounting hole; A terminal (2), wherein the terminal (2) is installed in the installation hole, and an annular groove (6) is formed between the terminal (2) and the upper shell cover (1); A junction box cover (4), the bottom end of which is sleeved on the outer side of the junction post (2); An annular flange (5), wherein the annular flange (5) is formed at the bottom end of the junction box cover (4); When the junction box cover (4) extends into the annular groove (6), the annular flange (5) is deformed and inserted into the bottom of the annular groove (6).

2. A plug-in connection structure for a junction box cover according to claim 1, characterized in that: The annular flange (5) is multi-layered, and the multi-layered annular flange (5) is arranged at intervals along the radial direction.

3. The plug-in connection structure of a junction box cover according to claim 2, characterized in that: The number of the annular flanges (5) is 2 to 5 layers, and the radial thickness of each layer of the annular flanges (5) is 0.1 to 0.5 mm.

4. A junction box cover plug-in connection structure according to claim 1 or 2, characterized in that: The annular flange (5) and the junction box cover (4) are made of elastic plastic or a composite material of rubber and plastic.

5. The plug-in connection structure of a junction box cover according to claim 1, characterized in that: It also includes an elastic sealing pad (3), which is accommodated in an annular groove (6). The elastic sealing pad (3) is sleeved on the outside of the terminal (2), and the annular flange (5) squeezes the elastic sealing pad (3) when inserted into the annular groove (6).

6. The plug-in connection structure of a junction box cover according to claim 1, characterized in that: It also comprises an elastic sealing pad (3), which is adhered to the side wall of the annular flange (5), and the elastic sealing pad (3) is squeezed when the annular flange (5) is inserted into the annular groove (6).

7. A junction box cover plug-in connection structure according to claim 5 or 6, characterized in that: The thickness of the elastic sealing pad (3) is 0.1-0.3 mm.

8. A junction box cover plug-in connection structure according to claim 5 or 6, characterized in that: An annular lip edge (7) protrudes from the elastic sealing pad (3).

9. A junction box cover plug-in connection structure according to claim 5 or 6, characterized in that: The surface of the elastic sealing pad (3) is provided with micro textures or protrusions.

10. A junction box cover plug-in connection structure according to claim 5 or 6, characterized in that: The elastic sealing pad (3) is made of rubber or silicone.

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