Cover plate tenon buckle structure

Abstract

The utility model discloses a kind of cover plate mortise buckling structure, including base and cover plate, the base one side wall is equipped with several mortise hole, the cover plate one side wall is equipped with several mortise column, cover plate can be covered in the base one side wall surface, and the mortise column on cover plate one side wall can be inserted in each mortise hole one by one, the mortise column diameter is less than mortise hole, the mortise column end circumferential outer side wall is formed with the riveting protrusion of radial outer expansion, the riveting protrusion is with mortise hole interference fit, the utility model can guarantee that base and cover plate mortise fixed connection firm, cover plate also cannot be warped and fall off under different environments, reduce the mortise hole on base and mortise column on cover plate processing precision requirement.

Description

Technical Field

[0001] This utility model relates to a terminal block, and more particularly to a cover plate tenon fastening structure. Background Technology

[0002] The insulating body of a terminal block connector generally consists of a base and a cover plate. The base has an opening slot joint for accommodating and positioning the terminal structure. The cover plate covers the outside of the base opening to encapsulate the terminal structure. Currently, the structure for fixing the base and cover plate is as follows: multiple round holes are set on the base, and multiple quadrangular prisms 27 are set on the cover plate. The base and cover plate are fastened together by interference fit between the four corners of the quadrangular prisms and the round holes.

[0003] The existing fastening method has high requirements for product size. Under different humidity and temperature environments, the size of the cover and base will change slightly. If the relative position of the prism and the round hole is offset, the cover will lift up. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a cover plate snap-fit ​​structure, which makes the fixed connection between the base and the cover plate more stable, and the cover plate will not lift up or fall off under any environment.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a cover plate tenon and mortise fastening structure, including a base and a cover plate. The base has a plurality of mortise holes on one side wall and a plurality of mortise posts on one side wall of the cover plate. The cover plate can cover the surface of one side wall of the base, and the mortise posts on one side wall of the cover plate can be inserted into each mortise hole in a corresponding manner. The diameter of the mortise post is smaller than that of the mortise hole. A radially expanding riveting protrusion is formed on the outer circumferential wall of the end of the mortise post. The riveting protrusion is interference-fitted with the mortise hole.

[0006] As a further improvement of this utility model, there is a set distance between the riveting protrusion and the end of the mortise and tenon column, and the riveting protrusion and the outer circumferential wall of the mortise and tenon column are connected by a bevel or arc surface.

[0007] As a further improvement of this utility model, the mortise hole is a round hole, and the mortise column is a round column or an elliptical column.

[0008] As a further improvement of this utility model, the outer surface of the mortise and tenon column is composed of two coaxially symmetrical convex arc surfaces and two axially symmetrical flat surfaces, or the outer surface of the mortise and tenon column is composed of two coaxially symmetrical convex arc surfaces and two axially symmetrical concave arc surfaces.

[0009] As a further improvement of this utility model, the riveting protrusion is a concentric arc protrusion provided on the outer side of the arc surface of the mortise and tenon column.

[0010] As a further improvement of this utility model, the opening end of the mortise hole is formed with a chamfered flared structure, and the root of the mortise column is provided with a chamfered connecting bevel, the size of which is smaller than the size of the chamfered flared structure.

[0011] As a further improvement of this utility model, a raised step is provided on one end edge of one side wall of the base, and a recessed step is provided on one end edge of one side wall of the cover plate. The raised step on the base can be inserted into the recessed step on the cover plate.

[0012] The beneficial effects of this utility model are as follows: This utility model designs the mortise and tenon on the cover plate to fit with the mortise and tenon hole on the base with a clearance fit. By setting a riveting protrusion on the outer side of the cylindrical end of the mortise and tenon, after the mortise and tenon is inserted into the mortise and tenon hole, the riveting protrusion on the mortise and tenon and the round hole on the base are interference fit to achieve riveting positioning. There is a gap between the root of the mortise and tenon and the mortise and tenon hole. In this way, the mortise and tenon and the mortise and tenon hole can maintain a stable riveting connection, and avoid the cover from lifting and falling off due to the interference fit of the root of the mortise and tenon and the mortise and tenon hole if the position of the mortise and tenon is deviated. This utility model can ensure that the base and the cover plate are firmly fixed by the tenon and tenon, and the cover plate will not lift or fall off in different environments. It also reduces the processing accuracy requirements of the mortise and tenon hole on the base and the mortise and tenon on the cover plate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the existing technology structure principle;

[0014] Figure 2 This is a perspective view of the present utility model;

[0015] Figure 3 This is a three-dimensional sectional view of the present invention;

[0016] Figure 4 This is the front view of the present invention;

[0017] Figure 5 for Figure 4 Sectional view along line AA;

[0018] Figure 6 for Figure 4 Sectional view along the BB direction;

[0019] Figure 7 for Figure 6 Enlarged view of section C;

[0020] Figure 8 This is the right view of the present invention;

[0021] Figure 9 This is a perspective view of the cover plate of this utility model;

[0022] Figure 10 for Figure 9 Enlarged view of section D in the middle;

[0023] Figure 11 This is a front view of the cover plate of this utility model;

[0024] Figure 12 This is a left view of the cover plate of this utility model;

[0025] Figure 13 This is a right view of the cover plate of this utility model. Detailed Implementation

[0026] Example: A cover plate 2 tenon-and-mortise fastening structure includes a base 1 and a cover plate 2. The base 1 has a plurality of mortise holes 11 on one side wall, and the cover plate 2 has a plurality of mortise posts 21 on one side wall. The cover plate 2 can cover the surface of one side wall of the base 1, and the mortise posts 21 on one side wall of the cover plate 2 can be inserted into each mortise hole 11 in a corresponding manner. The diameter of the mortise post 21 is smaller than that of the mortise hole 11. A radially expanding riveting protrusion 22 is formed on the outer circumferential wall of the end of the mortise post 21. The riveting protrusion 22 is interference-fitted with the mortise hole 11. When the cover plate 2 and the base 1 are connected by mortise and tenon post 21 and mortise and tenon hole 11, the riveting protrusion 22 on the mortise and tenon post 21 and the mortise and tenon hole 11 are interference fit to achieve a fixed connection, which is firm. Since the base of the mortise and tenon post 21 and the mortise and tenon hole 11 are clearance fit, when the position of the mortise and tenon hole 11 and the mortise and tenon post 21 is incorrect due to processing error, environmental or temperature change, the base of the mortise and tenon post 21 and the mortise and tenon hole 11 will not have interference. Therefore, the cover plate 2 is prevented from lifting and falling off.

[0027] There is a set distance between the riveting protrusion 22 and the end of the mortise and tenon post 21. The riveting protrusion 22 and the outer circumferential wall of the mortise and tenon post 21 are connected by a bevel or arc surface. When the cover plate 2 is combined with the base 1, the end of the mortise and tenon post 21 is inserted into the mortise and tenon hole 11 with a clearance fit for easy insertion. After insertion, the bevel or arc surface forms a guide, allowing the riveting protrusion 22 to be smoothly inserted into the mortise and tenon hole 11, thus achieving a fixed connection between the cover plate 2 and the base 1.

[0028] The mortise and tenon hole 11 is a round hole, and the mortise and tenon post 21 is a round or elliptical post, with the maximum cross-sectional dimension of the elliptical post being smaller than the diameter of the round hole.

[0029] The outer surface of the mortise and tenon column 21 is composed of two coaxially symmetrical convex arc surfaces 23 and two axially symmetrical flat surfaces 24, or the outer surface of the mortise and tenon column 21 is composed of two coaxially symmetrical convex arc surfaces 23 and two axially symmetrical concave arc surfaces. This structure can increase the root gap between the mortise and tenon column 21 and the mortise and tenon hole 11.

[0030] The riveting protrusion 22 is a concentric arc flat surface 24 protrusion provided on the outer side of the arc surface of the mortise and tenon column 21. The riveting protrusion 22 can also be a ring formed on the outer side of the circumference of the end of the mortise and tenon column 21.

[0031] The mortise and tenon hole 11 has a chamfered flared structure 12 at the opening end, and the mortise and tenon column 21 has a chamfered connecting bevel 25 at the root. The size of the chamfered connecting bevel 25 is smaller than the size of the chamfered flared structure 12.

[0032] The base 1 has a raised step 13 on one side edge of its side wall, and the cover plate 2 has a recessed step 26 on one side edge of its side wall. The raised step 13 on the base 1 can be inserted into the recessed step 26 on the cover plate 2.

Claims

1. A cover plate tenon-and-mortise interlocking structure, comprising a base (1) and a cover plate (2), wherein a plurality of mortise holes (11) are provided on one side wall of the base, and a plurality of mortise posts (21) are provided on one side wall of the cover plate, the cover plate being able to cover the surface of one side wall of the base, and the mortise posts on one side wall of the cover plate being able to be inserted one-to-one into each mortise hole, characterized in that: The diameter of the mortise and tenon post is smaller than that of the mortise and tenon hole. A radially expanding riveting protrusion (22) is formed on the outer circumferential wall of the end of the mortise and tenon post, and the riveting protrusion is interference-fitted with the mortise and tenon hole.

2. The cover plate tenon-and-mortise interlocking structure according to claim 1, characterized in that: There is a set distance between the riveting protrusion and the end of the mortise and tenon column, and the riveting protrusion and the outer circumferential wall of the mortise and tenon column are connected by a bevel or arc surface.

3. The cover plate tenon-and-mortise interlocking structure according to claim 1 or 2, characterized in that: The mortise and tenon hole is a round hole, and the mortise and tenon column is a round column or an elliptical column.

4. The cover plate tenon-and-mortise interlocking structure according to claim 3, characterized in that: The outer surface of the mortise and tenon column is composed of two coaxially symmetrical convex arc surfaces (23) and two axially symmetrical flat surfaces (24), or the outer surface of the mortise and tenon column is composed of two coaxially symmetrical convex arc surfaces and two axially symmetrical concave arc surfaces.

5. The cover plate tenon-and-mortise interlocking structure according to claim 4, characterized in that: The riveting protrusion is a concentric arc protrusion located on the outer side of the arc surface of the mortise and tenon column.

6. The cover plate tenon-and-mortise interlocking structure according to claim 1, characterized in that: The mortise and tenon hole opening end is formed with a chamfered flared structure (12), and the root of the mortise and tenon column is provided with a chamfered connecting bevel (25). The size of the chamfered connecting bevel is smaller than the size of the chamfered flared structure.

7. The cover plate tenon-and-mortise interlocking structure according to claim 1, characterized in that: The base has a raised step (13) on one end edge of one side wall and a recessed step (26) on one end edge of one side wall of the cover plate. The raised step on the base can be inserted into the recessed step on the cover plate.

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