A main-spring and auxiliary-spring nested type micro overload protection structure

Abstract

This utility model discloses a nested main and auxiliary spring miniature overload protection structure, belonging to the field of overload protection structures. It includes a base plate with a mounting ring on it; and an extension rod rotatably disposed within the mounting ring, containing a threaded section and a smooth section. This nested main and auxiliary spring miniature overload protection structure, through the arrangement of a sliding rod, compresses the main spring between the top plate and the limiting seat when the top plate and the limiting seat are compressed. Simultaneously, the built-in sliding plate slides downward within the extension rod, pulling the auxiliary spring downward. This provides overload buffering protection for the top plate and the limiting seat during downward movement through simultaneous internal and external means. It avoids instability caused by relying solely on the main spring's downward retraction. The limiting ring's ability to slide on the threaded section allows for convenient adjustment of the main spring's length.

Description

Technical Field

[0001] This utility model belongs to the field of overload protection structures, specifically relating to a nested main and auxiliary spring miniature overload protection structure. Background Technology

[0002] In existing technologies, when using a nested main and auxiliary spring miniature overload protection structure, the spring energy storage section in the nested main and auxiliary spring miniature overload protection structure is often retracted inward along the support rod to complete the use of the nested main and auxiliary spring miniature overload protection structure. However, when using the nested main and auxiliary spring miniature overload protection structure, the instability of this overload protection structure is caused by only retracting the main spring. This needs to be improved.

[0003] This invention attempts to mitigate or at least alleviate such problems or defects by providing new or otherwise improved overload protection structures. Utility Model Content

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a miniature overload protection structure with nested main and auxiliary springs, which has the advantage of avoiding the instability of the overload protection structure caused by simply retracting the main spring alone.

[0005] To achieve the above objectives, this utility model provides a nested main and auxiliary spring miniature overload protection structure, which includes a base plate with a mounting ring on it; An extension rod, which is rotatably disposed within the mounting ring, has a threaded section and a smooth section within the extension rod; A limiting ring, which is rotatably arranged on the threaded section; A sliding rod, slidably disposed within the extension rod, having a top plate on the sliding rod; and The main spring is slidably arranged on the extension rod and can cover the slide rod inside it. In the initial position, the two ends of the main spring abut against the limiting ring and the top plate, respectively.

[0006] As a further improvement of this utility model, a positioning bolt is detachably arranged at each of the four corners of the base plate, and the diameter of the positioning bolt is adapted to the diameter of the base plate.

[0007] As a further improvement of this utility model, the extension rod has a cavity inside, and an inner plate is detachably installed in the cavity. Multiple sets of support rods are detachably arranged at the bottom of the inner plate, and the multiple sets of support rods are interconnected with the extension rod.

[0008] As a further improvement of this utility model, a built-in sliding plate is detachably installed at one end of the slide rod that passes into the extension rod, and the built-in sliding plate can slide along the inner wall of the extension rod.

[0009] As a further improvement of this utility model, a spring can be detachably installed on the built-in slide plate, and the spring is connected to the inner top wall of the extension rod.

[0010] As a further improvement of this utility model, an anti-slip rubber sleeve can be removably fitted on the outer circumferential surface of the limiting ring, and the diameter of the anti-slip rubber sleeve is compatible with the diameter of the limiting ring.

[0011] As a further improvement of this utility model, a limiting seat can be detachably installed on the top surface of the top plate, and the diameter of the limiting seat is adapted to the diameter of the top plate.

[0012] As a further improvement of this utility model, an embedded hole is also provided in the limiting seat, and the diameter of the embedded hole is adapted to the diameter of the limiting seat.

[0013] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include: This utility model features a nested main and auxiliary spring miniature overload protection structure. Through the arrangement of sliding rods, when the top plate and limiting seat are compressed, the sliding rods compress the main spring between the top plate and the limiting ring. Simultaneously, the built-in sliding plate slides downward within the extension rod, pulling the auxiliary spring downward. This provides overload buffer protection for the top plate and limiting seat during downward movement through simultaneous internal and external means. It avoids instability caused by relying solely on the main spring's downward retraction. The limiting ring can slide on the threaded section, allowing for convenient adjustment of the main spring length, thus improving its flexibility of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the main and auxiliary spring nested miniature overload protection structure of this utility model; Figure 2 This is a structural schematic diagram of the main and auxiliary spring nested miniature overload protection structure of this utility model from another perspective; Figure 3 This is an exploded view of the main and auxiliary spring nested miniature overload protection structure of this utility model; Figure 4 This is a schematic diagram of the structure of the present invention when the extension rod and the slide rod are combined; Figure 5 This is a cross-sectional view of the extension rod and slide rod of this utility model when combined; Figure 6 This utility model Figure 5 Enlarged view of point A.

[0015] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. base plate; 11. mounting ring; 12. positioning bolt; 2. extension rod; 21. threaded section; 22. smooth section; 23. inner plate; 24. support rod; 3. limiting ring; 31. main spring; 4. slide rod; 41. built-in sliding plate; 42. secondary spring; 5. top plate; 6. limiting seat. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0018] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0019] In the embodiments, by Figure 1-6 A miniature overload protection structure with nested main and auxiliary springs is presented, wherein, Figure 1 This is a schematic diagram of the overall structure of the main and auxiliary spring nested miniature overload protection structure of this utility model; Figure 2 This is a structural schematic diagram of the main and auxiliary spring nested miniature overload protection structure of this utility model from another perspective; Figure 3 This is an exploded view of the main and auxiliary spring nested miniature overload protection structure of this utility model; Figure 4 This is a schematic diagram of the structure of the present invention when the extension rod and the slide rod are combined; Figure 5 This is a cross-sectional view of the extension rod and slide rod of this utility model when combined; Figure 6 This utility model Figure 5The enlarged view at point A includes a base plate 1 with a mounting ring 11; an extension rod 2 rotatably disposed within the mounting ring 11, having a threaded section 21 and a smooth section 22 within the extension rod 2; a limiting ring 3 rotatably disposed on the threaded section 21; a sliding rod 4 slidably disposed within the extension rod 2, having a top plate 5 on the sliding rod 4; and a main spring 31 slidably disposed on the extension rod 2, capable of enclosing the sliding rod 4 within it. In the initial position, the two ends of the main spring 31 abut against the limiting ring 3 and the top plate 5, respectively.

[0020] The overall concept behind this invention is that, through the arrangement of the sliding rod 4, when the top plate 5 and the limiting seat 6 are compressed, the sliding rod 4 can compress the main spring 31 between the top plate 5 and the limiting ring 3. At the same time, the built-in sliding plate 41 slides downward within the extension rod 2, and at the same time, it can pull the secondary spring 42 to extend downward. This provides overload buffer protection for the top plate 5 and the limiting seat 6 during downward movement by simultaneously from both inside and outside, which can avoid the instability of this overload protection structure caused by the main spring 31 retracting alone. The limiting ring 3 can slide on the threaded section 21, and the length of the main spring 31 can be easily adjusted, thus improving the flexibility of use.

[0021] In some embodiments, more specifically, in order to facilitate the quick installation and positioning of the base plate 1 as a whole, a positioning bolt 12 is detachably arranged at each of the four corners of the base plate 1, and the diameter of the positioning bolt 12 is adapted to the diameter of the base plate 1.

[0022] In some embodiments, more specifically, in order to facilitate the internal limiting of the built-in slide plate 41, a cavity is provided inside the extension rod 2, and an inner plate 23 is detachably installed in the cavity. Multiple sets of support rods 24 are detachably arranged at the bottom of the inner plate 23, and the multiple sets of support rods 24 are all connected to the extension rod 2.

[0023] In some embodiments, more specifically, in order to facilitate the sliding of the slide bar 4 as a whole within the extension rod 2, a built-in sliding plate 41 is detachably installed at one end of the slide bar 4 that penetrates into the extension rod 2, and the built-in sliding plate 41 can slide along the inner wall of the extension rod 2.

[0024] In some embodiments, more specifically, a spring 42 is detachably mounted on the built-in slide plate 41, and the spring 42 is connected to the inner top wall of the extension rod 2.

[0025] In some embodiments, more specifically, in order to improve the stability of the limiting ring 3 during rotation, an anti-slip rubber sleeve is removably fitted on the outer circumferential surface of the limiting ring 3, and the diameter of the anti-slip rubber sleeve is adapted to the diameter of the limiting ring 3.

[0026] In some embodiments, more specifically, in order to facilitate the adaptation and installation of the top plate 5 with external parts, a limiting seat 6 can be detachably installed on the top surface of the top plate 5, and the diameter of the limiting seat 6 is adapted to the diameter of the top plate 5.

[0027] In some embodiments, more specifically, in order to facilitate the fitting and installation of the top plate 5 with external parts, an embedded hole is also provided in the limiting seat 6, and the diameter of the embedded hole is adapted to the diameter of the limiting seat 6.

[0028] In summary, the slide bar 4, when the top plate 5 and the limiting seat 6 are compressed, can push the slide bar 4 to compress the main spring 31 between the top plate 5 and the limiting ring 3. At the same time, the built-in slide plate 41 slides downward in the extension rod 2, and at the same time pulls the secondary spring 42 to extend downward. This provides overload buffer protection for the top plate 5 and the limiting seat 6 during downward movement by simultaneously from the inside and outside. It can avoid the instability of this overload protection structure caused by the main spring 31 retracting alone. The limiting ring 3 can slide on the threaded section 21, and the length of the main spring 31 can be easily adjusted, thus improving the flexibility of use.

[0029] 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 nested main and auxiliary spring miniature overload protection structure, characterized in that, It includes A base plate (1) having a mounting ring (11) on it; An extension rod (2) is rotatably disposed within the mounting ring (11), and the extension rod (2) has a threaded section (21) and a smooth section (22). A limiting ring (3) is rotatably disposed on the threaded section (21); A slide bar (4), which is slidably disposed within the extension bar (2), has a top plate (5) on the slide bar (4); and The main spring (31) is slidably arranged on the extension rod (2), and the main spring (31) can cover the slide rod (4) inside it. In the initial position, the two ends of the main spring (31) abut against the limiting ring (3) and the top plate (5) respectively.

2. The nested main and auxiliary spring miniature overload protection structure according to claim 1, characterized in that, A positioning bolt (12) is detachably installed at each of the four corners of the base plate (1), and the diameter of the positioning bolt (12) is compatible with the diameter of the base plate (1).

3. The nested main and auxiliary spring miniature overload protection structure according to claim 1, characterized in that, The extension rod (2) has a cavity inside, and an inner plate (23) is detachably installed in the cavity. Multiple sets of support rods (24) are detachably arranged at the bottom of the inner plate (23), and the multiple sets of support rods (24) are connected to the extension rod (2).

4. The nested main and auxiliary spring miniature overload protection structure according to claim 3, characterized in that, A built-in sliding plate (41) is detachably installed at one end of the slide bar (4) that passes into the extension bar (2), and the built-in sliding plate (41) can slide along the inner wall of the extension bar (2).

5. The nested main and auxiliary spring miniature overload protection structure according to claim 4, characterized in that, A spring (42) is detachably mounted on the built-in slide plate (41), and the spring (42) is connected to the inner top wall of the extension rod (2).

6. The nested main and auxiliary spring miniature overload protection structure according to claim 5, characterized in that, An anti-slip rubber sleeve is removably fitted on the outer circumferential surface of the limiting ring (3), and the diameter of the anti-slip rubber sleeve is compatible with the diameter of the limiting ring (3).

7. The nested main and auxiliary spring miniature overload protection structure according to claim 6, characterized in that, A limiting seat (6) can be detachably installed on the top surface of the top plate (5), and the diameter of the limiting seat (6) is compatible with the diameter of the top plate (5).

8. The nested main and auxiliary spring miniature overload protection structure according to claim 7, characterized in that, An embedded hole is also provided in the limiting seat (6), and the diameter of the embedded hole is adapted to the diameter of the limiting seat (6).

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