Novel sealing binding post for refrigerator compressor

Abstract

The utility model discloses a novel sealing binding post for a refrigerator compressor, which comprises a binding post body and a metal bolt arranged at the center of the binding post body, a glass body used for fusion sealing is arranged between the binding post body and the metal bolt, the tail part of the metal bolt is provided with a limiting block which protrudes radially, and the limiting block is provided with a sealing groove. The outer diameter of the limiting block is larger than the diameter of an inner hole of the first motor lead wiring terminal, and the end part of the limiting block is provided with a guide chamfer; according to the technical scheme of the utility model, the limiting structure at the tail part of the metal bolt and the terminal form multi-dimensional constraint, so that the dual-terminal anti-falling effect of inhibiting thermal expansion deformation and vibration displacement is achieved; through the collaborative design of the guide chamfer and the limiting height, the press fitting resistance of the terminal is reduced, and effective balance between lossless assembly and rigid locking is further achieved.

Description

Technical Field

[0001] This utility model relates to the field of electrical sealing connection structure technology, specifically to a novel sealing terminal for a refrigerator compressor. Background Technology

[0002] As a core component connecting the motor and external power supply, the sealed terminal of the refrigerator compressor directly determines the compressor's operational stability through its structural reliability. Traditional solutions use an iron-nickel alloy pin and a cold-rolled steel column sealed with a glass body, relying on an interference fit between the pin and the motor lead terminals for fixation. While this structure meets basic insulation and sealing requirements, it has inherent defects in terms of material thermal expansion coefficient matching and resistance to mechanical vibration.

[0003] In existing technologies, the fastening methods for interference fits are limited by the differences in the linear expansion coefficients of different materials (such as iron-nickel alloy pins and copper terminals). The high-temperature environment during compressor operation can easily cause changes in the fit dimensions, turning the interference fit into a clearance fit. Furthermore, the lack of an effective constraint mechanism for the lateral alternating stress generated by compressor vibration further exacerbates the risk of terminal loosening.

[0004] To address the above issues, there is an urgent need for a technology solution that balances structural strength, ease of assembly, and long-term stability in preventing detachment. Utility Model Content

[0005] In view of the above-mentioned technical problems in related technologies, this utility model proposes a novel sealed terminal for refrigerator compressors, which can overcome the above-mentioned deficiencies of the prior art.

[0006] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0007] A novel sealed terminal block for refrigerator compressors;

[0008] The novel sealing terminal for a refrigerator compressor includes a terminal body and a metal pin disposed at the center of the terminal body. A glass body for fusion sealing is provided between the terminal body and the metal pin. A radially protruding limiting block is provided at the tail of the metal pin. The outer diameter of the limiting block is larger than the inner diameter of the first motor lead terminal, and the end of the limiting block is provided with a guide chamfer.

[0009] Furthermore, the limiting block consists of at least two limiting blocks evenly distributed along the circumference of the metal pin, and the interval area between each limiting block forms an assembly channel.

[0010] Furthermore, the height H of the limiting block satisfies the relationship: 0.2mm≤H≤1.5mm, and the maximum outer diameter D1 of the limiting block and the diameter D2 of the metal pin body satisfy the relationship: D1-D2≥0.3mm.

[0011] Furthermore, the limiting block is an annular boss surrounding the metal pin, and the axial cross-section of the annular boss is trapezoidal.

[0012] Optionally, a novel sealing terminal for a refrigerator compressor includes a terminal body and a metal pin disposed at the center of the terminal body. A glass body for fusion sealing is provided between the terminal body and the metal pin. A limiting groove is provided at the tail of the metal pin. A matching second motor lead terminal is provided with an elastic snap-fit ​​structure that cooperates with the limiting groove. The elastic snap-fit ​​structure includes at least two symmetrically distributed barbed springs.

[0013] Furthermore, the depth h of the limiting groove and the thickness t of the elastic buckle structure satisfy h≥1.2t, and the bottom diameter D3 of the limiting groove and the diameter D2 of the metal pin body satisfy D3≤D2-0.4mm.

[0014] Furthermore, the free end of the barbed spring is provided with a guide slope, and the angle between the guide slope and the axis of the metal pin is 20°-35°.

[0015] Furthermore, the elastic snap-fit ​​structure is made of shape memory alloy material, and the phase change temperature of the elastic snap-fit ​​structure is lower than the lower limit of the normal operating temperature range of the compressor.

[0016] Furthermore, the metal pin is made of iron-nickel alloy material, and the ratio of its coefficient of linear expansion to the coefficient of linear expansion of copper material in the first motor lead terminal or the second motor lead terminal is controlled within the range of 1:1.2-1:1.5.

[0017] The beneficial effects of this utility model are as follows: Through the optimized and improved design of the product of this utility model, the metal pin tail limiting structure and the terminal form a multi-dimensional constraint, thereby achieving a dual terminal anti-detachment effect that suppresses thermal expansion deformation and vibration displacement; through the coordinated design of guide chamfer and limiting height, the terminal pressing resistance is reduced, thereby achieving an effective balance between non-destructive assembly and rigid locking. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a partial cross-sectional view of a first embodiment of a novel sealed terminal block for a refrigerator compressor according to an embodiment of the present invention;

[0020] Figure 2 This is a partial perspective view of a first embodiment of a novel sealed terminal block for a refrigerator compressor according to an embodiment of the present utility model;

[0021] Figure 3 This is a partial cross-sectional view of a second embodiment of a novel sealed terminal block for a refrigerator compressor according to an embodiment of the present invention;

[0022] Figure 4 This is a partial cross-sectional view of the assembly state of a second embodiment of a novel sealed terminal block for a refrigerator compressor according to an embodiment of the present invention;

[0023] In the diagram: 1. Terminal body; 2. Metal pin; 3. Limiting block; 4. First motor lead terminal; 5. Limiting groove; 6. Elastic snap-fit ​​structure; 7. Hook-shaped spring; 8. Second motor lead terminal. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0025] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0026] like Figure 1-4As shown in the figure, a novel sealing terminal for a refrigerator compressor according to an embodiment of the present invention includes a terminal body 1 and a metal pin 2 disposed at the center of the terminal body 1. A glass body for fusion sealing is provided between the terminal body 1 and the metal pin 2. A radially protruding limiting block 3 is provided at the tail of the metal pin 2. The outer diameter of the limiting block 3 is larger than the inner diameter of the first motor lead terminal 4, and the end of the limiting block 3 is provided with a guide chamfer.

[0027] According to the present invention, a novel sealed terminal block for a refrigerator compressor is provided. In a specific embodiment, the limiting block 3 consists of at least two limiting blocks evenly distributed around the metal pin 2, and the interval between each limiting block forms an assembly channel.

[0028] According to the present invention, a novel sealed terminal block for a refrigerator compressor is provided. In a specific embodiment, the height H of the limiting block 3 satisfies the relationship: 0.2mm≤H≤1.5mm, and the maximum outer diameter D1 of the limiting block 3 and the body diameter D2 of the metal pin 2 satisfy the relationship: D1-D2≥0.3mm.

[0029] According to the present invention, a novel sealed terminal block for a refrigerator compressor is provided. In a specific embodiment, the limiting block 3 is an annular boss surrounding the metal pin 2, and the axial cross-section of the annular boss is trapezoidal.

[0030] According to the present invention, a novel sealing terminal for a refrigerator compressor includes, in a specific embodiment, a terminal body 1 and a metal pin 2 disposed at the center of the terminal body 1. A glass body for fusion sealing is provided between the terminal body 1 and the metal pin 2. A limiting groove 5 is provided at the tail of the metal pin 2. A matching second motor lead terminal 8 is provided with an elastic snap-fit ​​structure 6 that cooperates with the limiting groove 5. The elastic snap-fit ​​structure 6 includes at least two symmetrically distributed barbed springs 7.

[0031] According to the present invention, a novel sealed terminal block for a refrigerator compressor is provided. In a specific embodiment, the depth h of the limiting groove 5 and the thickness t of the elastic buckle structure 6 satisfy h≥1.2t, and the bottom diameter D3 of the limiting groove 5 and the body diameter D2 of the metal pin 2 satisfy D3≤D2-0.4mm.

[0032] According to the present invention, a novel sealed terminal block for a refrigerator compressor is provided. In a specific embodiment, the free end of the hook-shaped spring 7 is provided with a guide slope, and the angle between the guide slope and the axis of the metal pin 2 is 20°-35°.

[0033] According to the present invention, a novel sealed terminal block for a refrigerator compressor is provided. In a specific embodiment, the elastic snap-fit ​​structure 6 is made of shape memory alloy material, and the phase change temperature of the elastic snap-fit ​​structure 6 is lower than the lower limit of the normal operating temperature range of the compressor.

[0034] According to the present invention, a novel sealed terminal block for a refrigerator compressor is provided. In a specific embodiment, the metal pin 2 is made of iron-nickel alloy material, and the ratio of its coefficient of linear expansion to the coefficient of linear expansion of copper material of the first motor lead terminal 4 or the second motor lead terminal 8 is controlled within the range of 1:1.2-1:1.5.

[0035] To facilitate understanding of the above-mentioned technical solutions of this utility model, the following detailed description of the above-mentioned technical solutions of this utility model is provided through specific usage methods.

[0036] In practical use, this utility model describes a novel sealed terminal block for a refrigerator compressor.

[0037] In the first embodiment: The sealing terminal consists of a terminal body 1 made of cold-rolled steel and a metal pin 2 made of iron-nickel alloy, which are hermetically sealed by a high-temperature molten borosilicate glass body. The metal pin 2 has three circumferentially distributed limiting blocks 3 machined at its tail. The limiting block height H = 0.8 mm, the maximum outer diameter D1 = 3.3 mm, and the metal pin body diameter D2 = 3.0 mm, meeting the technical requirement of D1-D2 = 0.3 mm. The limiting block 3 has a 45° guide chamfer at its end, with an axial length of 0.6 mm. During assembly, the copper first motor lead terminal 4 is pressed in along the assembly channel. When the terminal end face contacts the limiting block 3, the limiting structure generates a radial constraint force of 1.2 kN. Vibration testing shows that the terminal displacement is less than 0.05 mm, and the change in the fitting clearance is controlled within 0.04 mm within the operating temperature range of -30℃ to 120℃.

[0038] In the second embodiment: An annular limiting groove 5 with a depth h = 0.6 mm and a bottom diameter D3 = 2.6 mm is machined at the tail of the metal pin 2. The matching second motor lead terminal 8 is made of alloy, and its elastic snap-fit ​​structure 6 includes two symmetrically distributed barbed springs 7 with a thickness t = 0.5 mm. A 30° guide slope is provided at the free end of the springs. When the second motor lead terminal 8 is press-fitted, the guide slope guides the barbed springs 7 to deform and slide into the limiting groove 5. After the elastic snap-fit ​​structure 6 engages with the limiting groove 5, a retaining force is generated. The elastic snap-fit ​​structure 6, made of shape memory alloy, has a phase change temperature set to -10℃ (5℃ lower than the compressor's minimum operating temperature). The shape memory effect at high temperatures increases the snap-fit ​​retaining pressure, effectively reducing the contact resistance change rate.

[0039] In summary, by utilizing the above-mentioned technical solution of this utility model and through the optimized and improved design of the product of this utility model, the metal pin tail limiting structure and the terminal form a multi-dimensional constraint, thereby achieving a dual terminal anti-detachment effect that suppresses thermal expansion deformation and vibration displacement; through the coordinated design of guide chamfer and limiting height, the terminal pressing resistance is reduced, thereby achieving an effective balance between non-destructive assembly and rigid locking.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel sealed terminal block for a refrigerator compressor, characterized in that, It includes a terminal block body (1) and a metal pin (2) disposed at the center of the terminal block body (1). A glass body for fusion sealing is provided between the terminal block body (1) and the metal pin (2). A radially protruding limiting block (3) is provided at the tail of the metal pin (2). The outer diameter of the limiting block (3) is larger than the inner diameter of the first motor lead terminal (4), and the end of the limiting block (3) is provided with a guide chamfer.

2. A novel sealed terminal block for a refrigerator compressor according to claim 1, characterized in that, The limiting block (3) consists of at least two limiting blocks evenly distributed along the circumference of the metal pin (2), and the interval area between each limiting block forms an assembly channel.

3. A novel sealed terminal block for a refrigerator compressor according to claim 2, characterized in that, The height H of the limiting block (3) satisfies the relationship: 0.2mm≤H≤1.5mm, and the maximum outer diameter D1 of the limiting block (3) and the body diameter D2 of the metal pin (2) satisfy the relationship: D1-D2≥0.3mm.

4. A novel sealed terminal block for a refrigerator compressor according to claim 1, characterized in that, The limiting block (3) is an annular boss surrounding the metal pin (2), and the axial cross section of the annular boss is trapezoidal.

5. A novel sealed terminal block for a refrigerator compressor, characterized in that, It includes a terminal block body (1) and a metal pin (2) disposed at the center of the terminal block body (1). A glass body for fusion sealing is provided between the terminal block body (1) and the metal pin (2). A limiting groove (5) is provided at the tail of the metal pin (2). The matching second motor lead terminal (8) is provided with an elastic snap-fit ​​structure (6) that cooperates with the limiting groove (5). The elastic snap-fit ​​structure (6) includes at least two symmetrically distributed barbed springs (7).

6. A novel sealed terminal block for a refrigerator compressor according to claim 5, characterized in that, The depth h of the limiting groove (5) and the thickness t of the elastic buckle structure (6) satisfy h≥1.2t, and the bottom diameter D3 of the limiting groove (5) and the body diameter D2 of the metal pin (2) satisfy D3≤D2-0.4mm.

7. A novel sealed terminal block for a refrigerator compressor according to claim 5, characterized in that, The free end of the hook-shaped spring (7) is provided with a guide slope, and the angle between the guide slope and the axis of the metal pin (2) is 20°-35°.

8. A novel sealed terminal block for a refrigerator compressor according to claim 5, characterized in that, The elastic snap-fit ​​structure (6) is made of shape memory alloy material, and the phase change temperature of the elastic snap-fit ​​structure (6) is lower than the lower limit of the normal operating temperature range of the compressor.

9. A novel sealed terminal block for a refrigerator compressor according to claim 1 or 5, characterized in that, The metal pin (2) is made of iron-nickel alloy material, and the ratio of its coefficient of linear expansion to the coefficient of linear expansion of copper material of the first motor lead terminal (4) or the second motor lead terminal (8) is controlled within the range of 1:1.2-1:1.5.

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