Terminal pin rivet joint for electric heating tube

Abstract

The utility model provides a terminal pin rivet joint for an electric heating tube, and relates to the technical field of electric heating tube fittings, the terminal pin rivet joint comprises a lead-out pin rod, the lead-out pin rod is sleeved with a terminal rivet head, the lead-out pin rod comprises a lead-out part, a crimping part and a positioning part from bottom to top, a plurality of axially extending locking edges are distributed on the circumference of the crimping part, and the terminal rivet head is sleeved with the lead-out part. The terminal rivet head comprises a nut part, a deformation part and a clamping part from bottom to top, an axially extending locking groove is formed in the circumference of the inner wall of the deformation part, the deformation part presses and abuts against the pressing part, the locking edge extends into the locking groove, and a plurality of first rhombic convex blocks connected end to end are distributed on the circumference of the outer wall of the positioning part. And a plurality of rhombic convex blocks II which are connected end to end are circumferentially distributed on the inner wall of the clamping part. According to the utility model, the terminal rivet head is fixedly sleeved on the lead-out pin rod through crimping, and locking is formed through mutual clamping connection of the rhombic convex block I and the rhombic convex block II, so that the lead-out pin rod and the pin rivet head have a good connection effect.

Description

Technical Field

[0001] This utility model relates to the technical field of electric heating tube accessories, specifically a terminal pin riveting connector for electric heating tubes. Background Technology

[0002] An electric heating element is an electrical component that converts electrical energy into heat energy. It is mainly made of a metal tube with a spiral heating alloy wire wound inside, and magnesium oxide powder with good insulation and thermal conductivity is filled in the gaps between the wires. Usually, lead rods are connected to both ends of the heating alloy wire, and the other end of the lead rods is connected to a terminal for connecting to a power source.

[0003] Terminal blocks are usually connected to lead-out rods by manual soldering. However, the soldering process requires more time and skill, and it is difficult to ensure that the terminal blocks are soldered to the lead-out rods in a fixed position. This makes it difficult to maintain consistent quality control and results in low processing efficiency. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a terminal pin riveting connector for electric heating tubes, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A terminal pin riveting connector for an electric heating element includes a lead-out pin, on which a terminal riveting head is fitted. The lead-out pin includes, from bottom to top, a lead-out portion, a crimping portion, and a positioning portion. The crimping portion has a plurality of axially extending locking ribs distributed around its circumference. The terminal riveting head includes, from bottom to top, a nut portion, a deformation portion, and a snap-fit ​​portion. The inner wall of the deformation portion has an axially extending locking groove. The deformation portion is crimped against the crimping portion, and the locking ribs extend into the locking groove.

[0009] Preferably, the outer wall of the positioning part is circumferentially distributed with a plurality of rhomboid protrusion groups 1, and a sliding gap is provided between two adjacent rhomboid protrusion groups 1. The rhomboid protrusion group 1 includes a plurality of rhomboid protrusions 1 connected end to end in the longitudinal direction. The inner wall of the snap-fit ​​part is circumferentially distributed with a plurality of rhomboid protrusion groups 2. The rhomboid protrusion group 2 includes a plurality of rhomboid protrusions 2 connected end to end in the longitudinal direction. A snap-fit ​​groove is formed between two adjacent rhomboid protrusions 2. The rhomboid protrusion 2 extends into the snap-fit ​​groove. The rhomboid protrusion 1 snaps between two downward rhomboid protrusions 1.

[0010] Preferably, the height of the positioning ridge is the same as the height of the rhomboid protrusion group one.

[0011] Preferably, the outer circumference of the terminal rivet head is provided with four deformation guide grooves, which divide the terminal rivet head into four parts. The deformation guide grooves are located on the outer side of the corresponding deformation part.

[0012] Preferably, a positioning groove is provided on the lower side of the nut portion, and a positioning ring is fixed on the lead-out portion, the positioning ring being engaged in the positioning groove.

[0013] (III) Beneficial Effects

[0014] This utility model provides a terminal pin riveting connector for electric heating tubes. It has the following advantages:

[0015] 1. In this utility model, the second diamond-shaped protrusion on the outer side of the lead-out pin can be inserted into the interior of the terminal rivet head along the sliding gap. Then, the lead-out pin is rotated relative to each other, so that the first diamond-shaped protrusion on the lead-out pin rotates circumferentially into the locking groove formed between the upper and lower second diamond-shaped protrusions. In the axial direction, the first diamond-shaped protrusion and the second diamond-shaped protrusion are locked together and positioned. The deformable part is pressed and deformed, so that the locking groove moves toward the locking rib until it is pressed and locked on the locking rib. The locking groove and the locking rib are locked together, so that the lead-out pin and the terminal rivet head are locked on the circumference, so that the first diamond-shaped protrusion cannot rotate and disengage from the locking of the second diamond-shaped protrusion, thus ensuring the stable connection between the lead-out pin and the terminal rivet head. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a terminal pin riveting joint for an electric heating tube according to the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the terminal rivet head in this utility model;

[0018] Figure 3 This is a schematic diagram of the lead-out pin structure in this utility model.

[0019] In the diagram: 1. Lead-out pin; 11. Lead-out part; 12. Crimping part; 13. Positioning part; 2. Terminal riveting; 21. Nut part; 22. Deformation part; 23. Snap-fit ​​part; 3. Positioning ring; 4. Diamond protrusion one; 5. Diamond protrusion two; 6. Positioning ridge; 7. Locking groove. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model embodiment provides a terminal pin riveting connector for electric heating tubes.

[0022] like Figure 1As shown, it includes a lead-out pin 1, a terminal rivet head 2 sleeved on the lead-out pin 1, a positioning groove provided on the lower side of the terminal rivet head 2, and a positioning ring 3 fixed on the lead-out pin 1. The positioning ring 3 is engaged in the positioning groove and can limit the depth of the lead-out pin 1 into the terminal rivet head 2. The positioning ring 3 is configured such that when the lead-out pin 1 is inserted into the terminal rivet head 2, the rhomboid protrusion 1 4 and rhomboid protrusion 2 5 are staggered in height, that is, the middle position of rhomboid protrusion 2 5 is directly opposite the docking position between two adjacent rhomboid protrusions 1 4.

[0023] like Figure 3 As shown, the lead-out pin 1 includes a lead-out part 11, a crimping part 12, and a positioning part 13 from bottom to top. The outer wall of the positioning part 13 is circumferentially distributed with a plurality of rhomboid protrusion groups 1. A sliding gap is provided between two adjacent rhomboid protrusion groups 1. The rhomboid protrusion group 1 includes a plurality of longitudinally connected rhomboid protrusions 4. The diameter of the outer edge of the rhomboid protrusion group 1 is equal to the inner diameter of the terminal rivet head 2.

[0024] like Figure 2 As shown, the terminal rivet head 2 includes a nut part 21, a deformation part 22 and a snap-fit ​​part 23 from bottom to top. The inner wall of the snap-fit ​​part 23 is circumferentially distributed with a number of rhomboid protrusion groups 2. A sliding gap is provided between two adjacent rhomboid protrusion groups 2. The rhomboid protrusion group 2 includes a number of rhomboid protrusion groups 2 5 connected end to end in the longitudinal direction. The diameter of the inner edge of the rhomboid protrusion group 2 is equal to the outer diameter of the lead-out pin 1.

[0025] like Figure 1-3 As shown, a snap-fit ​​groove is formed between two adjacent rhomboid protrusions 25, the rhomboid protrusion 25 extends into the snap-fit ​​groove, and the rhomboid protrusion 14 snaps between the two downward rhomboid protrusions 14.

[0026] In summary, during the process of inserting the lead-out pin 1 into the terminal rivet head 2, the first rhombus protrusion 4 is aligned with the sliding gap of the terminal rivet head 2, and the second rhombus protrusion 5 is aligned with the sliding gap of the lead-out pin 1. The pin 1 can be smoothly inserted into the terminal rivet head 2 until the positioning ring 3 is engaged in the positioning groove. At this time, the first rhombus protrusion 4 and the second rhombus protrusion 5 are staggered in height. Rotating the lead-out pin 1 can make the first rhombus protrusion 4 rotate and engage in the engagement groove formed between the two adjacent second rhombus protrusions 5, thus forming a position lock in the axial direction.

[0027] like Figure 1 As shown, the positioning ribs 6 are spaced apart and positioned on the same straight line as the rhomboid protrusions 4. The height of the positioning ribs 6 is the same as the height of the rhomboid protrusions 4. This can prevent the positioning ribs 6 from smoothly entering the terminal rivet head 2 during the process of inserting the lead-out pin 1 into the terminal rivet head 2, thus avoiding the situation where the ribs are stuck and cannot be installed.

[0028] The crimping part 12 has several axially extending locking ribs 6 distributed around its circumference, and the inner wall of the deformable part 22 has an axially extending locking groove 7. The deformable part 22 is crimped against the crimping part 12, and the locking ribs 6 extend into the locking grooves 7. The locking ribs 6 and the deformed locking grooves 7 are interlocked and locked, preventing the lead-out pin 1 from rotating circumferentially in the terminal rivet head 2, that is, the diamond-shaped protrusion 4 cannot rotate circumferentially to disengage from the interlocking groove, thus ensuring the stability of the connection between the lead-out pin 1 and the terminal rivet head 2.

[0029] Further configured, the outer circumference of the terminal rivet head 2 is provided with four deformation guide grooves, which divide the terminal rivet head 2 into four parts. The deformation guide grooves are located on the outer side of the corresponding deformation part 22. The deformation guide grooves reduce the outer wall thickness of the terminal rivet head 2, providing a position that is easier to deform relative to the original thickness of the terminal rivet head 2. The setting of the deformation guide grooves can form deformation guidance on the terminal rivet head 2, and the deformation direction of the terminal rivet head 2 can be controlled after pressure is applied, so that the terminal rivet head 2 divided into four parts deforms as a whole, and more locking grooves 7 can contact the locking ribs 6 to form a snap-fit, so that the snap-fit ​​effect is better.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A terminal pin riveting connector for an electric heating element, comprising a lead-out pin, characterized in that: The lead-out pin is fitted with a terminal rivet head. The lead-out pin includes a lead-out part, a crimping part and a positioning part from bottom to top. The crimping part has a plurality of axially extending locking ribs distributed around its circumference. The terminal rivet head includes a nut part, a deformation part and a snap-fit ​​part from bottom to top. The inner wall of the deformation part has an axially extending locking groove. The deformation part crimps against the crimping part, and the locking ribs extend into the locking groove.

2. The terminal pin riveting connector for an electric heating element according to claim 1, characterized in that: The outer wall of the positioning part is circumferentially distributed with several groups of rhomboid protrusions, and a sliding gap is provided between two adjacent groups of rhomboid protrusions. The group of rhomboid protrusions includes several rhomboid protrusions connected end to end in the longitudinal direction. The inner wall of the snap-fit ​​part is circumferentially distributed with several groups of rhomboid protrusions, and the group of rhomboid protrusions includes several rhomboid protrusions connected end to end in the longitudinal direction. A snap-fit ​​groove is formed between two adjacent groups of rhomboid protrusions, and the rhomboid protrusions extend into the snap-fit ​​groove. The rhomboid protrusions are snapped between two downward rhomboid protrusions.

3. A terminal pin riveting connector for an electric heating element according to claim 2, characterized in that: The height of the locking rib is the same as the height of the first rhomboid protrusion group.

4. A terminal pin riveting connector for an electric heating element according to claim 3, characterized in that: The outer circumference of the terminal rivet head is provided with four deformation guide grooves, which divide the terminal rivet head into four parts. The deformation guide grooves are located on the outside of the corresponding deformation part.

5. A terminal pin riveting connector for an electric heating element according to claim 4, characterized in that: A positioning groove is provided on the lower side of the nut part, and a positioning ring is fixed on the lead-out part, and the positioning ring is engaged in the positioning groove.

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