Waterproof sealing structure of compressor binding post

Abstract

The utility model belongs to the field of compressors, and particularly relates to a waterproof sealing structure of a compressor binding post, which is mounted on a compressor shell and comprises a mounting base, a gasket and a joint. The mounting base is fixed on the compressor shell and is arranged around the sealing binding post; the gasket is arranged in the mounting base and between the mounting base and the sealing binding post; the connector is assembled in the mounting base, and the end face of the connector is pressed on the surface of the gasket. Compared with the prior art, the detachable waterproof sealing structure solves the problems that in the prior art, a sealing structure is large in size, occupies space, is not suitable for installation and is poor in sealing performance, and the detachable waterproof sealing structure is convenient to install, occupies small space and is excellent in stability and has the advantages of being resistant to vibration and loosening.

Description

Technical Field

[0001] The utility model belongs to the field of compressors, and in particular relates to a waterproof sealing structure of a compressor terminal. Background Art

[0002] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It sucks low-temperature, low-pressure refrigerant gas from the suction pipe, compresses it through the motor, and discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0003] The compressor currently mainly uses a junction box cover and a gasket placed above the upper shell cover, which mainly protects the sealed terminal and plays a waterproof role. For example, CN116404796A discloses a compressor with an electrical waterproof structure, which forms a ring weld by welding the contact area between the junction box body and the terminal cover, and realizes the function of completely waterproofing the waterproof junction box structure by designing the sealing structure between the junction box body and the junction box cover. However, the junction box cover and the gasket are large in size and take up space; on the other hand, the junction box cover is not easy to install and the sealing effect is not good, which affects the waterproof effect.

[0004] For example, a waterproof structure and compressor disclosed in CN220570401U include a junction box cover and a sealing gasket. The junction box cover is fastened to the sealing gasket by bolts. The sealing gasket is convex upward on the side facing the junction box cover to form an annular boss. The outer side of the annular boss is concave downward to form a bottom surface. The cross section of the annular boss is rectangular. A plug-in portion is formed on one side of the junction box cover opening. The plug-in portion is plugged into the outer side of the annular boss. The bottom surface and the outer side surface of the annular boss are connected to form an arc surface. A crimping surface is formed near one end of the plug-in portion to form a crimping surface abutting against the bottom surface. The arc surface includes a first area and a second area. The first area is connected to the bottom surface, the second area is connected to the outer side surface, and the first area abuts against the crimping surface. However, this scheme improves the sealing performance by making the junction box cover and the sealing gasket contact through interference fit and pressure deformation. This method will make the sealing structure difficult to disassemble and easily cause structural damage during the disassembly process, so it is difficult to realize the inspection and maintenance of the internal structure.

[0005] Therefore, it is necessary to propose a waterproof sealing structure which has good waterproof sealing performance and will not damage the original structure. Utility Model Content

[0006] The purpose of the present utility model is to provide a waterproof sealing structure for a compressor terminal in order to solve at least one of the above problems, so as to solve the problem that the sealing structure in the prior art is large in size, occupies space, is difficult to install, and has a poor sealing effect. The present solution realizes a detachable waterproof sealing structure, which is easy to install, occupies a small space, has excellent stability, and has the advantages of being shock-proof and anti-loosening.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A waterproof sealing structure for a compressor terminal, mounted on a compressor housing, the waterproof sealing structure comprising a mounting base, a gasket and a joint;

[0009] The mounting base is fixed on the compressor housing and is arranged around the sealing terminal;

[0010] The gasket is arranged in the mounting base, between the mounting base and the sealing terminal;

[0011] The connector is assembled inside the mounting base, and the end face of the connector is pressed against the surface of the gasket to press the gasket toward the compressor housing. The cables connected to the sealed terminal are collected in the connector.

[0012] Preferably, the connector is a PG connector.

[0013] Preferably, the joint comprises a joint body, a waterproof ring and a sealing cap;

[0014] The joint body comprises a first joint, a second joint and a limiting member, wherein the limiting member is connected between the first joint and the second joint;

[0015] The first joint is assembled inside the mounting base and abuts against the gasket;

[0016] The waterproof ring is arranged to fit the inner wall surface of the second joint;

[0017] The sealing cap is assembled on the outside of the second joint.

[0018] Preferably, the mounting base is welded to the surface of the upper shell cover, and the center of the sealing terminal coincides with the center of the mounting base.

[0019] Preferably, the mounting base includes a mounting bottom surface and a mounting cylindrical surface matched with the joint; the mounting cylindrical surface is a cylindrical structure.

[0020] Preferably, the mounting base comprises a mounting bottom surface and a mounting cylindrical surface matched with the joint; the mounting cylindrical surface is composed of a plurality of arc surfaces arranged at intervals.

[0021] Preferably, the mounting base and the joint are threadedly connected.

[0022] Preferably, the outer diameter of the gasket fits the inner diameter of the mounting base, and the inner diameter of the gasket fits the outer diameter of the sealing terminal.

[0023] Preferably, the end of the second joint includes a plurality of slices distributed at intervals, and when the sealing cap is assembled on the outside of the second joint, the plurality of slices are restrained to be retracted radially inwards.

[0024] Preferably, the inner walls of the plurality of slices are provided with protrusions, and the outer wall of the waterproof ring is provided with grooves corresponding to the protrusions. The function of the grooves is to limit the waterproof ring and prevent it from sliding down.

[0025] Preferably, the protrusion forms a step relative to the inner wall of the second joint, and the groove may be an annular groove.

[0026] Preferably, the joint and the sealing cap are threadedly connected.

[0027] Preferably, the sealing cap is a fastening nut.

[0028] Preferably, the limiter is a convex ring extending radially, the convex ring is between the mounting base and the sealing cap, and the lower end face of the convex ring abuts against the upper end face of the mounting base. Specifically, the length of the external thread of the first end of the joint (first joint) should be greater than or equal to the height of the mounting cylinder of the mounting base, and the length of the external thread of the second end of the joint (second joint) should be greater than or equal to the length of the internal thread of the sealing cap. Ensure that one end of the joint (first joint) is installed with interference fit with the mounting base to ensure the sealing effect.

[0029] The working principle of the utility model is:

[0030] The joint squeezes the gasket and the sealing cap squeezes and locks the waterproof sealing structure as a whole, so that the waterproof sealing structure is basically free of gaps in the radial direction, thereby ensuring the sealing and waterproof effect.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] This solution provides a sealing and waterproof structure for a rotary and detachable compressor terminal. A mounting base is added to the upper shell cover and the outer side of the sealed terminal. The mounting base is fixed with the gasket, the connector body, the waterproof ring and the fastening nut to provide sealing protection for the sealed terminal and the wiring harness. Compared with the traditional terminal box cover, the structure of this solution is more convenient to install and has better stability. It has the advantages of shockproof and anti-loosening. At the same time, this protection method takes up little space, and the mounting base can be selected in a variety of forms. Except for the mounting base, everything else can be detached, which further saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the cross-sectional structure of the waterproof sealing structure;

[0034] Figure 2 It is a front view structural schematic diagram of the fastening nut;

[0035] Figure 3 This is a schematic diagram of the front view structure of the waterproof ring;

[0036] Figure 4 It is a front view structural schematic diagram of the joint;

[0037] Figure 5 Schematic diagram of the top view of the joint;

[0038] Figure 6 Schematic diagram of the top view of the gasket;

[0039] Figure 7 It is a structural schematic diagram of a fully sealed mounting base;

[0040] Figure 8 It is a structural schematic diagram of a segmented installation base;

[0041] In the figure: 1-installation base; 2-gasket; 3-connector body; 4-waterproof ring; 5-sealing cap; 6-compressor housing; 7-sealing terminal. DETAILED DESCRIPTION

[0042] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] A waterproof sealing structure for a compressor terminal, such as Figure 1-8 As shown, it is installed on the compressor housing 6, and the waterproof sealing structure includes a mounting base 1, a gasket 2, and a joint;

[0045] The mounting base 1 is fixed on the compressor housing 6 and is arranged around the sealing terminal 7;

[0046] The gasket 2 is arranged in the mounting base 1, between the mounting base 1 and the sealing terminal 7;

[0047] The joint is assembled inside the mounting base 1 , and the end face of the joint is pressed against the surface of the gasket 2 , so as to press the joint of the gasket 2 toward the compressor housing 6 .

[0048] More specifically, in this embodiment:

[0049] like Figure 1As shown, the waterproof sealing structure is composed of a mounting base 1 at the bottom, a gasket 2, and a joint. Among them, the mounting base 1 is directly welded and fixed to the outside of the compressor housing 6, and is concentrically arranged around the sealing terminal 7; the gasket 2 is arranged inside the mounting base 1 and fits on the compressor housing 6, and abuts between the mounting base 1 and the sealing terminal 7; the joint as a whole is composed of a joint body 3, a waterproof ring 4 and a sealing cap 5, and the lower end of the joint body 3 (the first joint) extends into the interior of the mounting base 1 and forms a threaded connection with the mounting base 1; the upper end of the joint body 3 (the second joint) is provided with an annular protrusion, which is the same height as the waterproof ring 4, and the waterproof ring 4 is fitted on the inner side wall of the annular protrusion. Specifically, the end of the second joint includes a plurality of slices distributed at intervals. When the sealing cap 5 is assembled on the outside of the second joint, the plurality of slices can be radially retracted inward. In addition, the inner wall of the plurality of slices is provided with a protrusion, and the outer wall of the waterproof ring 4 that matches it is provided with a groove corresponding to the protrusion; the sealing cap 5 adopts a fastening nut, and is threadedly connected to the upper end (the second joint) of the joint body 3 on the outer wall surface.

[0050] Install the base 1, such as Figure 7 , 8 , including a mounting bottom surface (annular) for welding and fixing with the compressor housing 6 and a mounting cylindrical surface (hollow cylindrical, provided with internal threads) for threaded connection with the lower end of the joint. The mounting cylindrical surface can adopt two structural forms: one is a fully sealed structure, such as Figure 7 , which is a complete cylinder structure, and the inner surface is also provided with a complete internal thread; the second is a segmented structure, such as Figure 8 , which is composed of a plurality of (n≥2) circumferentially spaced arc surfaces, each of which is provided with an internal thread on its inner wall surface, and each of which is located on the same complete circular ring, and the internal threads thereon are also located on the same complete internal thread pattern. It should be noted that the sizes of the arc surfaces are not required to be completely equal, but the heights should be equal. If the surface of the compressor housing 6 is concave and convex, the arc surfaces can also be distributed asymmetrically.

[0051] Specifically, the mounting base 1 is fixed on the upper shell cover of the compressor, and the shape of the end surface of the mounting surface facing the upper shell cover can be adapted to the shape of the end surface of the upper shell cover and fits on the upper shell cover.

[0052] Gasket 2, such as Figure 6 As shown, the annular gasket 2 has an outer diameter consistent with the inner diameter of the mounting base 1 and an inner diameter consistent with the outer diameter of the sealing terminal 7, so after being placed inside the mounting base 1, it can be just embedded between the mounting base 1 and the sealing terminal 7. The provision of the gasket 2 can further enhance the sealing effect.

[0053] The connector body 3 of the connector, such as Figure 4 , 5, both the upper and lower surfaces are provided with external threads, which are respectively threadedly connected with the mounting base 1 and the sealing cap 5. Between the external threads at the middle and both ends of the joint body 3, a convex ring (limiting member) protruding radially outward is provided, which matches the lower end face of the sealing cap 5 and the upper end face of the mounting base 1, and satisfies: the length of the external thread at the first end of the joint body 3 should be greater than or equal to the height of the mounting cylinder of the mounting base 1, and the length of the external thread at the second end of the joint body 3 should be greater than or equal to the length of the internal thread of the sealing cap 5, so that after the waterproof sealing structure is locked, the three can be pressed against each other, or a certain gap can be left between the lower end face of the convex ring in the joint body 3 and the upper end face of the mounting base 1, and between the upper end face of the convex ring and the lower end face of the sealing cap 5. At the upper end of the connector body 3, an annular protrusion (slice-shaped structure, arranged at equal intervals along the circumference) is further extended upward, and the height of the annular protrusion is basically the same as that of the waterproof ring 4. After the flexible waterproof ring 4 is inserted into the annular protrusion of the connector body 3, the annular protrusion is tightened by the sealing cap 5 to achieve the extrusion deformation of the waterproof ring 4 to tighten the wiring harness passing inside. By screwing the connector body 3 into the mounting base 1, the gasket 2 can be squeezed toward the compressor housing 6, so that the gasket 2 is slightly deformed to further seal the gap and improve the sealing effect.

[0054] Waterproof ring 4, such as Figure 3 As shown, its outer diameter is consistent with the inner diameter of the annular protrusion, so that the waterproof ring 4 can fit tightly to each other after being assembled inside the annular protrusion. An annular groove can also be provided on the outer wall of the waterproof ring 4, and a bump can also be provided on the inner wall surface of the annular protrusion, so that the waterproof ring 4 can be better and more firmly embedded in the inner wall surface of the annular protrusion. The inner diameter of the waterproof ring 4 is basically consistent with the inner diameter of the connector body 3, and the upper diameter is slightly smaller than the lower diameter, which can fully fit the outer ring of the wire harness led out from the inside, and further, under the action of the sealing cap 5, it can effectively protect and waterproof the wire harness.

[0055] Sealing cap 5, such as Figure 2 , which is provided with an internal thread, and is threadedly connected with the external thread on the upper part of the joint body 3. The sealing cap 5 adopts a fastening nut, and by screwing in and tightening the fastening nut, the waterproof sealing structure can be fully pressed and tightly fitted, thereby avoiding leakage due to gaps in the radial direction.

[0056] In summary, the waterproof sealing structure protects and seals the sealing terminal 7. The mounting base 1 has a variety of structural forms, and the waterproof sealing structure as a whole can be easily disassembled and restored, which can effectively save materials and reduce costs. At the same time, the reliable structural design makes it have good stability.

[0057] The present solution provides a waterproof sealing structure for a detachable compressor terminal, which effectively seals and protects the sealed terminal 7 and the wiring harness led out from the sealed terminal 7; compared with the traditional junction box (cover), it is more convenient to install and has better stability, and has the advantages of shockproof and anti-loosening. In addition, this protection method occupies little space, and the installation base 1 has a variety of forms to choose from, which can further save costs.

[0058] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A waterproof sealing structure for a compressor terminal, mounted on a compressor housing (6), characterized in that: The waterproof sealing structure comprises a mounting base (1), a gasket (2) and a joint; The mounting base (1) is fixed on the compressor housing (6) and is arranged around the sealing terminal (7); The gasket (2) is arranged in the mounting base (1), between the mounting base (1) and the sealing terminal (7); The connector is assembled inside the mounting base (1), and the end face of the connector is pressed against the surface of the gasket (2) to press the gasket (2) toward the compressor housing (6), and the cables connected to the sealed terminal (7) are collected in the connector.

2. A waterproof sealing structure for a compressor terminal according to claim 1, characterized in that: The mounting base (1) comprises a mounting bottom surface and a mounting cylindrical surface matched with the joint; the mounting cylindrical surface is a cylindrical structure.

3. The waterproof sealing structure of a compressor terminal according to claim 1, characterized in that: The mounting base (1) comprises a mounting bottom surface and a mounting cylindrical surface matched with the joint; the mounting cylindrical surface is composed of a plurality of arc surfaces arranged at intervals.

4. A waterproof sealing structure for a compressor terminal according to any one of claims 1 to 3, characterized in that: The mounting base (1) and the joint are threadedly connected.

5. The waterproof sealing structure of a compressor terminal according to claim 1, characterized in that: The outer diameter of the gasket (2) fits the inner diameter of the mounting base (1), and the inner diameter of the gasket (2) fits the outer diameter of the sealing terminal (7).

6. The waterproof sealing structure of a compressor terminal according to claim 1, characterized in that: The joint comprises a joint body (3), a waterproof ring (4) and a sealing cap (5); The joint body (3) comprises a first joint, a second joint and a limiting member, wherein the limiting member is connected between the first joint and the second joint; The first joint is assembled inside the mounting base (1) and abuts against the gasket (2); The waterproof ring (4) is arranged to fit the inner wall surface of the second joint; The sealing cap (5) is assembled on the outside of the second joint.

7. A waterproof sealing structure for a compressor terminal according to claim 6, characterized in that: The end of the second joint comprises a plurality of slices distributed at intervals, and when the sealing cap (5) is assembled on the outside of the second joint, the plurality of slices are restrained to be retracted radially inwards.

8. The waterproof sealing structure of a compressor terminal according to claim 7, characterized in that: The inner walls of the plurality of slices are provided with protrusions, and the outer wall of the waterproof ring (4) is provided with grooves corresponding to the protrusions.

9. The waterproof sealing structure of a compressor terminal according to claim 7, characterized in that: The sealing cap (5) is a fastening nut.

10. The waterproof sealing structure of a compressor terminal according to claim 6, characterized in that: The limiting member is a convex ring extending radially, the convex ring is located between the mounting base (1) and the sealing cap (5), and the lower end surface of the convex ring abuts against the upper end surface of the mounting base (1).

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