Quick dismounting and fixing device for ignition needle

Abstract

The utility model relates to the technical field of commercial kitchen stove equipment, and discloses a quick dismounting and fixing device for an ignition needle, which comprises a main body, a fixed sleeve, a movable part and a clamp spring leaf. The main body is axially provided with a mounting hole, one end of the main body is provided with a fixing groove, the fixing sleeve is nested in the fixing groove, and two sides of an inner boss are respectively provided with a movable groove and an elastic sheet groove; the movable part comprises a movable ring and an outer boss, the outer boss can slide along the movable groove, and one end of the movable ring is provided with a conical head used for opening the elastic part of the snap spring elastic piece; and the snap spring elastic sheet clamps the ignition needle through the elastic parts which are uniformly distributed. According to the device, tool-free insertion and extraction of the ignition needle are achieved by pressing the movable part, the fixing sleeve flanging structure is rust-proof, and the clamp spring and the elastic piece are uniform in load and anti-loose. The problems that a traditional nut is tedious in fixing and dismounting and easy to loosen are solved, and the device is suitable for efficient and safe maintenance of combustion equipment.

Description

Technical Field

[0001] This utility model relates to the field of commercial kitchen stove equipment technology, specifically to a quick-release and fixing device for an ignition needle. Background Technology

[0002] Traditional methods of fixing ignition needles to the burner head typically employ a threaded nut locking structure. This involves machining threads or a flange at the tail of the ignition needle, inserting it into the burner head mounting hole, and then tightening the nut on the outside of the burner head. This technical solution has the following significant drawbacks:

[0003] 1. Low installation efficiency: The installation requires the use of tools such as wrenches for tightening operations, which makes it difficult to apply force, especially in confined spaces, resulting in low assembly efficiency;

[0004] 2. Difficult to disassemble and maintain: After long-term use, the nuts are prone to corrosion and adhesion due to high temperature oxidation or carbon buildup. Forced disassembly may cause the threads to strip or even the ignition needle to break.

[0005] 3. Poor structural reliability: When the nut is tightened, multiple stress concentrations are applied to the ignition needle, which is prone to loosening and falling off under frequent vibration, requiring repeated tightening and maintenance. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a quick-release and fixing device for ignition needles. This solves the problems existing in the prior art.

[0007] The technical solution is: A quick-release and fixing device for an ignition needle, comprising:

[0008] The main body is a columnar structure with a mounting hole at its axial center. One end of the mounting hole is provided with a coaxial annular fixing groove, which is located at the end of the main body.

[0009] The fixing sleeve is a ring structure that is nested in the fixing groove. The inner wall of the fixing sleeve is provided with a radially inwardly protruding annular inner boss. A movable groove is provided on one side of the inner boss, and a spring groove with a width greater than the movable groove is provided on the other side of the movable groove. The spring groove extends to one end face of the fixing sleeve.

[0010] The movable part includes a movable ring, and an outwardly protruding outer boss is provided on the outer side of the movable ring. The outer boss is nested in the movable groove and can move back and forth along the axial direction of the movable groove.

[0011] The retaining spring includes a mounting part and an elastic part. The mounting part is generally ring-shaped, and multiple elastic parts are evenly arranged on the inner ring of the mounting part. The elastic parts extend obliquely from the edge of the inner ring of the mounting part towards the axis. The mounting part is nested in the spring groove.

[0012] Based on the above technical solution, a further optimization is made: a conical hole with a coaxial center is provided at the connection between the fixing groove and the mounting hole, and the diameter of the hole near the moving part is larger than the diameter of the hole away from the moving part.

[0013] Based on the above technical solution, the outer edge of the fixing groove is formed into a flange by a stamping process. After the flange is bent, it extends towards the axis of the mounting hole. The fixing sleeve includes a small sleeve and a large sleeve connected to the small sleeve and having an outer diameter larger than its outer diameter. The large sleeve is fixedly installed in the fixing groove, and the flange is pressed between the large sleeve and the small sleeve.

[0014] Based on the above technical solution, the inner hole of the small sleeve is a funnel shape that expands outward, and its inner wall is smoothly connected to the inner boss.

[0015] Based on the above technical solution, a further optimization is made: a tapered head with a diameter that varies from large to small is provided on the outer side of one end of the movable ring, and its tapered surface extends to the end of the movable ring; the outer boss is connected to the tapered head; and a flange is provided on the outer side of the other end of the movable ring.

[0016] Based on the above technical solution, further optimization is made by providing external threads on the outside of the main body for fixing it to the stove head, and providing an external hexagonal wrench mating part on the outside of the main body.

[0017] Compared with the prior art, this utility model has the following core advantages:

[0018] 1. Tool-free quick assembly and disassembly

[0019] Addressing the pain point: Traditional nut tightening requires a wrench, making construction difficult in confined spaces.

[0020] Innovative design: Through the elastic cooperation between the movable part (moving ring + outer boss) and the retaining spring, pressing the movable part causes the conical head to guide the elastic part to expand radially. When the ignition needle is inserted, it slides into place along the mounting hole. Then, the movable part is released, and the elastic part resets and locks in place. When disassembling, pressing the movable ring triggers the spring to release, and the ignition needle can be removed. No tools are required throughout the process, greatly reducing installation time.

[0021] 2. Corrosion-resistant and maintenance-free structure

[0022] Addressing the pain point: Rust and adhesion of nuts make disassembly difficult.

[0023] Innovative design: The fixing sleeve and the main body are fully enclosed and rust-proofed through stamping and flanging; the retaining spring is made of nickel-based alloy material to avoid threaded contact, and can still be disassembled and reassembled by hand after long-term use, greatly extending the maintenance cycle.

[0024] 3. Load-sharing and anti-loosening mechanism

[0025] The problem is that the concentrated stress from tightening the nut causes it to loosen due to vibration.

[0026] Innovative design: The multiple elastic parts of the snap ring spring are evenly distributed around the circumference to clamp the ignition needle, dispersing radial stress; the conical head of the movable coil and the outer boss form a self-locking inclined surface, which greatly improves the clamping force under vibration.

[0027] Experimental conclusions

[0028] Rapid disassembly and assembly verification: Simulating a repair scenario, untrained personnel can replace the ignition pin within 5 seconds with a 100% success rate;

[0029] Accelerated life test: After 20,000 insertion and removal cycles, the clamping force of the retaining spring decreased by only 8%.

[0030] Through structured comparison and data quantification, the improvements in this patent have created a generational advantage over existing technologies in both theory and practice, and are particularly suitable for industrial combustion equipment and civilian gas appliances with high safety requirements. Attached Figure Description

[0031] Figure 1 This is the front view of this utility model;

[0032] Figure 2 This is a utility model Figure 1 A half-section view along the AA direction;

[0033] Figure 3 This is a utility model Figure 2 A three-dimensional image;

[0034] Figure 4 This is an exploded view of this utility model;

[0035] Figure 5 This is a perspective view of the snap ring spring of this utility model;

[0036] Figure 6 This is a half-sectional view of the movable part of this utility model;

[0037] Figure 7 This is a half-sectional view of the fixing sleeve of this utility model;

[0038] Figure 8 This is a half-sectional view of the main body of this utility model;

[0039] Figure 9This is a three-dimensional schematic diagram of the present invention installed on the stove head;

[0040] Figure 10 This is a cross-sectional view of the ignition needle mounting part of this utility model.

[0041] Among them, 1. Main body, 11. Flanged edge, 12. Fixing groove, 13. Conical hole, 14. Mounting hole, 2. Fixing sleeve, 21. Large sleeve, 22. Small sleeve, 23. Inner boss, 24. Movable groove, 25. Spring slot, 26. Flared part, 3. Movable part, 31. Movable ring, 32. Flange, 33. Outer boss, 34. Conical head, 4. Snap spring, 41. Mounting part, 42. Elastic part, 5. Ignition needle, 6. Stove head. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] Combined with appendix Figure 1-10 The following is an embodiment of the quick-release and connection device for the ignition needle of this utility model:

[0046] Structural features

[0047] 1. Main Structure

[0048] The main body 1 is a cylinder with a mounting hole 14 at its axial center. One end of the mounting hole 14 has a fixing groove 12. The fixing groove 12 and the mounting hole 14 are connected by a coaxially arranged tapered hole 13. The outer edge of the fixing groove 12 is formed by stamping to form a flange 11 that bends towards the axis. The outer surface of the main body 1 is machined with external threads and an external hexagonal structure for fixed connection with the furnace head 6.

[0049] 2. Fixed sleeve and movable part

[0050] The fixing sleeve 2 is nested within the fixing groove 12 and consists of a large sleeve 21 and a small sleeve 22. The large sleeve 21 is placed in the fixing groove 12, and then the fixing sleeve 2 is pressed and fixed by the stamped flange 11. The inner hole of the small sleeve 22 is an outwardly expanding trumpet shape, which smoothly transitions with the inner boss 23 of the fixing sleeve 2. A movable groove 24 is formed on one side of the inner boss 23, and a spring groove 25 is connected to the other side.

[0051] The movable part 3 includes a movable ring 31, with an outer boss 33 on its outer side that is embedded in the movable groove 24 and can slide axially. One end of the movable ring 31 is provided with a conical head 34, and the other end is provided with a flange 32. During installation, the conical head 34 is used to press the movable part 3 into the fixed sleeve 2, which serves as an installation guide. During operation, it presses the movable part, and the conical surface compresses the elastic part 42, which serves to guide and open the elastic part 42.

[0052] 3. Snap ring spring

[0053] The snap ring spring 4 is composed of an annular mounting part 41 and a uniformly distributed elastic part 42. The mounting part 41 is embedded in the spring groove 25, and the elastic part 42 extends inclined towards the axis.

[0054] Work process

[0055] 1. Installation: A threaded hole is provided on one side of the burner head housing. The main body 1 is fixed in the threaded hole by a threaded connection. Press the movable part 3, and the end face of its conical head 34 squeezes the elastic part 42 on the retaining spring 4. The conical head 34 guides the elastic part 42 to expand radially. The ignition needle 5 passes through the center hole and the mounting hole 14 on the movable part 3. After it is in place, release the movable part 3, and its elastic part 42 resets and clamps the ignition needle 5.

[0056] 2. Disassembly: Press the flange 32 on the movable part 3, the conical head 34 will open the elastic part 42 again, and after releasing the clamp, pull out the ignition needle.

[0057] Implementation effect

[0058] 1. Assembly and disassembly efficiency: Can be completed by hand, taking significantly less time than traditional nut tightening methods;

[0059] 2. Durability: After long-term vibration and high-temperature testing, the clamping performance showed no significant degradation;

[0060] 3. Rust and corrosion prevention: The enclosed fixed sleeve 2 structure prevents metal parts from oxidizing and sticking together.

[0061] Key points of the process

[0062] 1. The fixing sleeve 2 is permanently fixed to the main body 1 by stamping and flanging;

[0063] 2. The retaining spring 4 is made of nickel-based alloy and undergoes heat treatment to improve its elastic life;

[0064] Any unmentioned structures and connections are common knowledge.

[0065] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick-release and fixing device for an ignition needle, characterized in that: The utility model relates to a kind of furnace head fixing device, including: Main body, the main body is the cylindrical structure of axial center installation hole, one end of the installation hole is equipped with coaxial annular fixed slot, the fixed slot is arranged in the end of main body; Fixed sleeve, the fixed sleeve is annular structure, it is nested in the fixed slot, the inner wall of the fixed sleeve is equipped with radial inner convex annular inner boss, the inner boss one side is provided with movable slot, the movable slot other side is provided with the width greater than its spring piece slot, the spring piece slot extends to the end surface of fixed sleeve; Movable part, the movable part includes movable ring, the outside of the movable ring is provided with a circumferential outer convex boss, the outer convex boss is nested in the movable slot, the outer convex boss can move back and forth along the axial direction of movable slot; Spring clip, the spring clip includes mounting portion and elastic portion, the mounting portion is annular structure as a whole, the inner ring of mounting portion is evenly provided with multiple elastic portions, the elastic portion is inclined to extend to the axis from the inner ring edge of mounting portion, the mounting portion is nested in the spring piece slot.

2. The igniter point quick release and retention device of claim 1, wherein: The junction of the fixed slot and installation hole is provided with coaxial taper hole, the aperture close to movable part is greater than the aperture away from movable part.

3. The igniter point quick release and retention device of claim 1 wherein: The outer edge of the fixed slot is formed by stamping process Flanging, the flanging extends to the axis direction of installation hole after bending, the fixed sleeve includes small sleeve and large sleeve connected with the small sleeve and the outer diameter is greater than its outer diameter, the large sleeve is fixedly installed in the fixed slot, the flanging is pressed between the large sleeve and small sleeve.

4. The igniter point quick release and retention device of claim 3 wherein: The inner hole of the small sleeve is trumpet mouth shape that expands to outside, and its inner wall is smoothly connected with inner boss.

5. The igniter point quick release and retention device of claim 1 wherein: The outside of one end of the movable ring is provided with taper head with diameter change from big to small, the taper surface extends to the end of the movable ring, the outer convex boss is connected with the taper head, the outside of the other end of the movable ring is provided with a circumferential flange.

6. The igniter point quick release and retention device of claim 1 wherein: The outside of the main body is provided with external thread for fixing it on furnace head, the outside of the main body is provided with outer hexagonal wrench cooperation part.

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