CN219973687U - A mechanical connection sleeve with a limiting function - Google Patents

Abstract

The utility model discloses a mechanical connection sleeve with a position-limiting function, which relates to steel bar connectors and is intended to solve the problem that workers may directly break through the obstruction during construction, resulting in excessive screwing. The key points of the technical solution are: a A mechanical connection sleeve with a limiting function includes a sleeve portion, the sleeve portion is provided with a threaded hole, and a limiting structure is provided in the middle section of the threaded hole of the sleeve portion. The limiting structure is used to block low-torque rotation. The restraining structure can be breached by high-torque screwed-in steel bars. The utility model provides a mechanical connection sleeve with a limiting function, which ensures that two steel bars are pressed against each other in the middle of the threaded hole where the limiting structure is located, further ensuring the tight position of the two steel bars.

Description

A mechanical connection sleeve with a limiting function

Technical field

The utility model relates to steel bar connecting parts, more specifically, it relates to a mechanical connecting sleeve with a limiting function.

Background technique

Mechanical connection of steel bars is a new type of steel bar connection process. It is called the "third generation steel bar joint" after binding and electric welding. It has the advantages of joint strength higher than the steel bar base material, faster than electric welding, no pollution, and saving steel. The current mechanical connection sleeve is mainly a hollow structure with a circular shape. The sleeve is provided with a connecting thread that meshes with the thread of the steel bar end.

Regarding the steel bar connecting sleeve, the applicant applied for a steel bar connecting sleeve with the Chinese patent announcement number CN218668208U. Its technical key points are: it includes a sleeve part and a threaded hole opened along the central axis of the sleeve part. The sleeve The cylinder part includes an upper cylinder and a lower cylinder processed and formed on the upper cylinder. The outer wall of the upper cylinder has a cylindrical structure, and its circumferential surface is provided with a plurality of straight grooves at equal angles along the length direction. The straight grooves are For adapting to a socket wrench, the cross-sectional outer surface of the lower barrel has a polyhedral structure for adapting to a clamp wrench.

In order to ensure that the end faces of the two steel bars are in contact to meet the national standard requirements, the Chinese patent with announcement number CN218668208U also discloses that the sleeve part is perpendicular to the central axis and has a midpoint hole, and the midpoint hole is plugged and fixed with a midpoint pin, thereby The midpoint pin limits the ultimate screwing depth of the steel bar, effectively preventing one of the steel bars from being screwed in excessively; it should be noted that the midpoint pin is processed and formed with a tip, so that the tip can contact the chamfer of the screwed-in end of the steel bar, preventing Due to the setting of the midpoint pin, the ends of the two steel bars cannot offset each other.

The applicant found in actual application that the above technical solution can only generate blocking force at the moment when the steel bar is screwed into the midpoint, and workers may directly break through the blocking force during construction, resulting in the problem of over-screwing; therefore, a new method needs to be proposed. program to solve this problem.

Utility model content

In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a mechanical connection sleeve with a limiting function to ensure that the two steel bars are tightly pressed in the middle of the threaded hole where the limiting structure is located.

The above technical purpose of the present invention is achieved through the following technical solution: a mechanical connection sleeve with a position limiting function, including a sleeve portion, the sleeve portion is provided with a threaded hole, and the sleeve portion is provided with a threaded hole. A limiting structure is provided in the middle section of the threaded hole. The limiting structure is used to block the steel bars screwed in with low torque. The limiting structure can be broken through by the steel bars screwed in with high torque.

By adopting the above technical solution, when using this application to connect two steel bars, the two steel bars are screwed in with low torque until initial contact with the restraining structure, and then the steel bars are tightened with high torque, thereby ensuring that the two steel bars are in the restraint structure. The middle part of the threaded hole is tightened, and compared with the existing technology, it has a limited advance amount, which further ensures the tightening position of the two steel bars.

The utility model is further configured such that: the restriction structure is an internal thread breaking position punched and formed at the middle position of the threaded hole, and an extrusion deformation portion is formed on the edge of the internal thread breaking position.

The utility model is further configured such that the restriction structure is an additional solder point fixed by electric welding at the middle position of the threaded hole.

The utility model is further configured such that the specific number of additional solder points is three, which are respectively located at both ends of the middle section and the center of the middle section.

The utility model is further configured such that: the limiting structure is an outer punching position punched on the outer wall of the sleeve part, and the outer punching is located in the middle section of the threaded hole to form a limiting inner convex portion.

The utility model is further configured such that: the restriction structure is a glue layer applied and glued to the middle position of the threaded hole.

To sum up, the present utility model has the following beneficial effects: it ensures that the two steel bars are tightly pressed against each other in the middle of the threaded hole where the restriction structure is located. Compared with the prior art, it has a limited advance amount and further ensures the tight position of the two steel bars. ; Direct stamping can be processed to form a restriction structure, which not only meets the technical requirements for limiting the advance amount, but also makes processing more convenient.

Description of drawings

Figure 1 is a cross-sectional view of Embodiment 1;

Figure 2 is a cross-sectional view of Embodiment 2;

Figure 3 is a cross-sectional view of Embodiment 3;

Figure 4 is a cross-sectional view of Embodiment 4;

Figure 5 is an enlarged view of part A in Figure 4, mainly showing the restricted inner convex portion.

Description of the drawings: 1. Sleeve part; 2. Threaded hole; 301. Internal thread damage position; 302. Extrusion deformation part; 311. Additional solder joints; 321. Glue coating; 341. External stamping position; 342. Limitation Inner bulge.

Implementation

The utility model will be further described in detail below in conjunction with the accompanying drawings.

Identical components are designated with the same reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top" "Face," "inside," and "outside" refer to directions toward or away from the geometric center of a specific part, respectively.

Embodiment 1: A mechanical connection sleeve with a limiting function, as shown in Figure 1, including a sleeve part 1, the sleeve part 1 is provided with a threaded hole 2, and the middle section of the threaded hole 2 of the sleeve part 1 is provided with The limiting structure is used to block the steel bars screwed in with low torque. The limiting structure can be broken through by the steel bars screwed in with high torque.

When using this application to connect two steel bars, screw the two steel bars in sequence with low torque until they make initial contact with the restricting structure, and then tighten the two steel bars in sequence with high torque to ensure that the two steel bars are in the threaded holes where the restricting structure is located. 2. The middle part is tightened. Compared with the existing technology, it has a limited advance amount, which further ensures the tightening position of the two steel bars.

The specific structure of the restriction structure is as follows. The restriction structure is an internal thread breaking position 301 stamped and formed in the middle of the threaded hole 2. An extrusion deformation part 302 is formed on the edge of the internal thread breaking position 301. The restriction structure can be formed by direct stamping. Compared with Compared with the existing technology, it not only meets the technical requirements of limiting the advance amount, but also makes processing more convenient.

Embodiment 2: The difference of this embodiment is that different restriction structures are used. As shown in Figure 2, the restriction structure is an additional solder point 311 fixed by electric welding at the middle position of the threaded hole 2. The specific number of the additional solder point 311 is three. They are respectively located at both ends of the middle section and the center of the middle section; there are two sudden torque increase points when screwing in each steel bar. The first time is when approaching the middle section, and the second time is when the midpoint is tightened. Compared with the existing technology and implementation Example 1: The end-face contact points of two steel bars are closer to the midpoint of the sleeve part 1.

Embodiment 3: The difference of this embodiment is that different restriction structures are used. As shown in Figure 3, the restriction structure is a glue layer 321 applied and glued to the middle position of the threaded hole 2; on the premise of meeting the limit advance amount, The processing is relatively simple, and compared with the above two embodiments, no damage to the thread is required.

Embodiment 4: The difference of this embodiment is that different restriction structures are used. As shown in Figures 4 and 5, the restriction structure is an outer punching position 341 punched on the outer wall of the sleeve part 1, and the outer punching position 341 is in the middle section of the threaded hole 2. A limiting inner convex portion 342 is formed inside; the limiting structure is formed by external stamping, which has the technical effect of more convenient processing compared with the prior art and Embodiment 1.

The specific embodiments are only explanations of the present utility model, and they are not limitations of the present utility model. Those skilled in the art can make modifications to the present embodiments without creative contribution as needed after reading this description. However, as long as the present utility model is are protected by patent law within the scope of their claims.

Claims (6)

1. The utility model provides a mechanical connection sleeve with limit function, includes sleeve portion (1), sleeve portion (1) is run through and is provided with screw hole (2), its characterized in that: the middle section of the threaded hole (2) of the sleeve part (1) is provided with a limiting structure, the limiting structure is used for blocking the low-torque screwed-in reinforcing steel bars, and the limiting structure can be broken through by the high-torque screwed-in reinforcing steel bars.

2. A mechanical connection sleeve with a limiting function according to claim 1, characterized in that: the limiting structure is an internal thread breaking position (301) formed in the middle section of the threaded hole (2) in a stamping mode, and an extrusion deformation portion (302) is formed at the edge of the internal thread breaking position (301).

3. A mechanical connection sleeve with a limiting function according to claim 1, characterized in that: the limiting structure is an additionally arranged welding spot (311) fixed at the middle section of the threaded hole (2) by electric welding.

4. A mechanical connection sleeve with a limiting function according to claim 3, characterized in that: the number of the additional welding spots (311) is three, and the welding spots are respectively positioned at the two ends of the middle section and the center of the middle section.

5. A mechanical connection sleeve with a limiting function according to claim 1, characterized in that: the limiting structure is an outer punching position (341) punched on the outer wall of the sleeve part (1), and a limiting inner convex part (342) is formed in the middle section of the threaded hole (2) at the outer punching position (341).

6. A mechanical connection sleeve with a limiting function according to claim 1, characterized in that: the limiting structure is a glue coating layer (321) which is smeared and glued at the middle section of the threaded hole (2).