Concentric and coaxial tool for butt joint of reinforcing steel bars

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a steel bar butt joint concentric and coaxial tool which comprises an outer sleeve and an inner sleeve assembly, the inner sleeve assembly comprises a first inner sleeve and a second inner sleeve, stepped through holes are formed in the outer sleeve and comprise a first through hole and a second through hole, and the diameter of the first through hole is larger than that of the second through hole; the first inner sleeve is arranged on the inner wall of the first through hole in a sliding mode, an extension sleeve is arranged at one end of the second inner sleeve, the second inner sleeve is arranged on the inner wall of the first through hole in a sliding mode, and the extension sleeve is arranged on the inner wall of the second through hole in a sliding mode; a plurality of sliding blocks are evenly distributed on the outer wall of the first inner sleeve, a plurality of sliding grooves corresponding to the sliding blocks are evenly distributed in the circumference of the outer sleeve, and the sliding blocks are arranged in the sliding grooves in a sliding mode. The inner wall of the first inner sleeve is in threaded connection with a first steel bar, and the inner wall of the second inner sleeve is in threaded connection with a second steel bar. According to the structure, after the two butt-joint steel bars are in place, mechanical threaded connection can be rapidly achieved through the adjustable sleeve structure without drawing and rotating the steel bars.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, in particular to a concentric and coaxial tool for butting steel bars. Background Art

[0002] During mechanical rebar connection construction, straight thread sleeves are typically used. This method of mechanical rebar connection is primarily divided into two types: straight thread sleeves with positive and reverse thread sleeves. The principle is to insert two threaded rebars from the left and right ends of a sleeve, rotate them, and tighten them into the sleeves to achieve a mechanical connection.

[0003] During actual construction, due to the large outer diameter and long length of the steel bars, it is difficult to rely on manpower to pull and rotate the steel bars after they are in place to achieve the threaded connection between the steel bars and the sleeve. Therefore, the site generally needs to be equipped with some drawing equipment to assist in pulling and rotating the steel bars, which makes the connection between the steel bars and the sleeve more complicated. The normal mechanical connection of the straight thread sleeve is difficult, time-consuming and labor-intensive. Utility Model Content

[0004] In response to the technical problems existing in the background technology, the utility model provides a concentric and coaxial tool for butt-jointing steel bars. After the two butt-jointed steel bars are in place, there is no need to pull or rotate the steel bars, and a mechanical threaded connection can be quickly achieved through a sleeve structure.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] A concentric and coaxial tool for connecting steel bars, comprising an outer sleeve and an inner sleeve assembly, the inner sleeve assembly comprising a first inner sleeve and a second inner sleeve, a stepped through hole being provided in the outer sleeve, the stepped through hole comprising through hole one and through hole two, the diameter of through hole one being larger than the diameter of through hole two; the first inner sleeve being slidably arranged on the inner wall of through hole one, an extension sleeve being provided at one end of the second inner sleeve, the second inner sleeve being slidably arranged on the inner wall of through hole one, and the extension sleeve being slidably arranged on the inner wall of through hole two; a plurality of sliders being evenly distributed on the outer wall of the outer sleeve, a plurality of sliding grooves corresponding to the sliders being evenly distributed on the circumference of the outer sleeve, the sliders being slidably arranged in the sliding grooves; the inner wall of the first inner sleeve being threadedly connected to the first steel bar, and the inner wall of the second inner sleeve being threadedly connected to the second steel bar.

[0007] Optionally, the outer sleeve is provided with an external thread section and a fixed cylinder section along the length direction, and the external thread section is provided on the side where the slide groove is located; a locking nut is threadedly connected to the external thread section, and one end of the locking nut is provided close to the slider.

[0008] Optionally, a threaded hole 1 is provided on the locking nut, a limiting screw is provided in the threaded hole 1, and the limiting screw extends into the sliding groove.

[0009] Optionally, the fixed barrel section is configured to be a regular polygon.

[0010] Optionally, the extension sleeve is configured to be a regular polygon.

[0011] Optionally, when the slider is set close to one end of the slide groove away from the fixed barrel section, the first inner sleeve is extended to the outside of the outer sleeve, and the second inner sleeve and the extension sleeve can be received inside the outer sleeve; when the slider is set close to one end of the slide groove close to the fixed barrel section, the extension sleeve is extended to the outside of the outer sleeve, and the first inner sleeve can be received inside the outer sleeve.

[0012] Optionally, a first screw segment is provided at one end of the first steel bar, and a second screw segment is provided at one end of the second steel bar; a first internal threaded hole is provided inside the first inner sleeve, and a second internal threaded hole is provided inside the second inner sleeve and the extension sleeve; the first screw segment is provided in the first internal threaded hole, and the second screw segment is provided in the second internal threaded hole.

[0013] The utility model has the following advantages and beneficial effects:

[0014] The utility model designs a concentric and coaxial tool for butt jointing steel bars. After the two butted steel bars are in place, there is no need to pull and rotate the steel bars, and a mechanical threaded connection can be quickly achieved through a sleeve structure. Through an outer sleeve, and an inner sleeve assembly that is slidably arranged inside the outer sleeve, the first inner sleeve and the second inner sleeve can adjust the distance between each other through the relative sliding of the first inner sleeve and the second inner sleeve, so that the length can be adjusted to adapt to and butt joint the steel bars on both sides, and the connection can be quickly achieved. This length-adjustable sleeve structure does not require pulling the steel bars when connecting the butt joint steel bars to the sleeve structure on site. Through the adjustable inner sleeve assembly, the sleeve structure and the steel bars can be mechanically connected quickly and conveniently, further improving the butt joint efficiency and ensuring the coaxiality of the two butt joint steel bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural diagram of the concentric and coaxial tool for butting steel bars provided by the present invention;

[0016] Figure 2 for Figure 1 Front view of

[0017] Figure 3 A cross-sectional view of the concentric and coaxial tool for butting steel bars provided by the present invention;

[0018] Figure 4 A cross-sectional view of the concentric and coaxial tool for butting steel bars provided by the present invention and a first steel bar being butted together;

[0019] Figure 5 for Figure 4 A cross-sectional view of the concentric and coaxial tool for butting the steel bars and the first steel bar being butted together and mechanically connected;

[0020] Figure 6 for Figure 5 A cross-sectional view of the concentric and coaxial tool for butting rebar and the second rebar;

[0021] Figure 7 for Figure 6 A cross-sectional view of the concentric and coaxial tool for butting the steel bar and the second steel bar and making a mechanical connection;

[0022] Figure 8 A structural diagram of the jacket provided by the utility model;

[0023] Figure 9 A cross-sectional view of the jacket provided by the present invention;

[0024] Figure 10 This is a structural diagram of the first inner sleeve provided by the utility model;

[0025] Figure 11 A structural diagram of the second inner sleeve provided by the utility model;

[0026] Icon: 1-outer sleeve, 11-external threaded section, 12-fixed barrel section, 13-slide groove, 14-through hole one, 15-through hole two, 2-first inner sleeve, 21-slider, 22-first internal threaded hole, 3-second inner sleeve, 31-extension sleeve, 32-second internal threaded hole, 4-locking nut, 41-threaded hole one, 5-first steel bar, 51-first screw section, 6-second steel bar, 61-second screw section. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0029] Example

[0030] like Figures 1 to 11As shown, a concentric and coaxial tool for joining rebars is provided, comprising an outer sleeve 1 and an inner sleeve assembly, wherein the inner sleeve assembly is slidably disposed within the outer sleeve 1. The inner sleeve assembly comprises a first inner sleeve 2 and a second inner sleeve 3. The outer sleeve 1 is provided with a stepped through hole, comprising a first through hole 14 and a second through hole 15. The diameter of the first through hole 14 is larger than the diameter of the second through hole 15, and the first through hole 14 and the second through hole 15 extend through the entire outer sleeve 1. The first inner sleeve 2 is slidably disposed on the inner wall of the first through hole 14. An extension sleeve 31 is provided at one end of the second inner sleeve 3. The outer diameter of the extension sleeve 31 is smaller than that of the second inner sleeve 3. The second inner sleeve 3 is slidably disposed on the inner wall of the first through hole 14, and the extension sleeve 31 is slidably disposed on the inner wall of the second through hole 15. The outer wall of the first inner sleeve 2 is uniformly distributed with a plurality of sliders 21, preferably two in this embodiment. The outer sleeve 1 is uniformly distributed around its circumference with a plurality of chute grooves 13 corresponding to the sliders 21. The sliders 21 slide within the chute grooves 13 to achieve telescopic positioning. This allows the first inner sleeve 2 to telescopically slide relative to the outer sleeve 1, while the first inner sleeve 2 and the outer sleeve 1 can simultaneously rotate. A first steel bar 5 is threadedly connected to the inner wall of the first inner sleeve 2, and a second steel bar 6 is threadedly connected to the inner wall of the second inner sleeve 3.

[0031] Through the outer sleeve 1 and the inner sleeve assembly that is slidably disposed inside the outer sleeve 1, and through the relative sliding of the first inner sleeve 2 and the second inner sleeve 3, the distance between the first inner sleeve 2 and the second inner sleeve 3 can be adjusted, and they can be extended or retracted from the outer sleeve 1, so that the length can be adjusted to adapt to and connect the steel bars on both sides, and quickly achieve connection. This length-adjustable sleeve structure does not require pulling the steel bars when connecting the steel bars to the sleeve structure on site. Through the adjustable inner sleeve assembly, the sleeve structure and the steel bars can be mechanically connected conveniently and quickly, further improving the docking efficiency and ensuring the coaxiality of the two docked steel bars.

[0032] Furthermore, the outer sleeve 1 is provided with an externally threaded section 11 and a fixed barrel section 12 along its length. The externally threaded section 11 is positioned on the side where the chute 13 is located, that is, the chute 13 is formed on the externally threaded section 11. A locking nut 4 is threadedly connected to the externally threaded section 11, one end of which is positioned in close contact with the slider 21. This design allows the first inner sleeve 2 to be slid by rotating the locking nut 4, so that one end of the first inner sleeve 2 is in close contact with one end of the second inner sleeve 3, thereby achieving a secure connection between the first inner sleeve 2, the second inner sleeve 3, and the outer sleeve 1.

[0033] Furthermore, the locking nut 4 is provided with a threaded hole 141, in which a limit screw is provided, which extends into the chute 13. This design can further enhance the connection stability of the locking nut 4. When the limit screw is set in the chute 13, it can prevent the locking screw from retreating, thereby ensuring the stability of the connection between the steel bar and the sleeve structure.

[0034] Furthermore, the fixed barrel section 12 is configured as a regular polygon, which is convenient for rotation by a wrench or similar tool to achieve a mechanical connection function.

[0035] Furthermore, the extension sleeve 31 is configured as a regular polygon, which is convenient for rotation by a wrench or similar tool to achieve a mechanical connection function.

[0036] like Figure 5 As shown, when the slider 21 is set away from the fixed barrel section 12 and close to one end of the slide groove 13 (that is, the slider 21 is located on the left side), the first inner sleeve 2 extends to the outside of the outer sleeve 1, and the second inner sleeve 3 and the extension sleeve 31 can be received inside the outer sleeve 1.

[0037] like Figure 4 As shown, when the slider 21 is positioned close to one end of the slide groove 13 close to the fixed barrel section 12 (i.e., the slider 21 is located on the right side), the extension sleeve 31 extends to the outside of the outer sleeve 1, and the first inner sleeve 2 can be received inside the outer sleeve 1.

[0038] Furthermore, a first screw segment 51 is provided at one end of the first steel bar 5, and a second screw segment 61 is provided at one end of the second steel bar 6; a first internal threaded hole 22 is provided inside the first inner sleeve 2, and a second internal threaded hole 32 is provided inside the second inner sleeve 3 and the extension sleeve 31; the first screw segment 51 is provided in the first internal threaded hole 22, and the second screw segment 61 is provided in the second internal threaded hole 32.

[0039] Connection principles and steps of steel bars and sleeve structures:

[0040] 1. As Figure 4 As shown, when the slider 21 is slid to the right so that it is close to the fixed barrel section 12 and is set close to one end of the slide groove 13 (that is, the slider 21 is located on the right side), the extension sleeve 31 is extended to the outside of the outer sleeve 1, and the first inner sleeve 2 is inside the outer sleeve 1, and the first steel bar 5 and the first screw segment 51 are set opposite one end of the outer sleeve 1.

[0041] 2. If Figure 5 As shown, Figure 4 The first inner sleeve 2 slides to the left and extends out of the outer sleeve 1, and docks with the first screw segment 51, then the outer sleeve 1 and the first inner sleeve 2 are rotated synchronously, and the first screw segment 51 is threadedly connected to the first inner sleeve 2.

[0042] 3. Figure 6 As shown, the second inner sleeve 3 is slid to the left so that the extension sleeve 31 is accommodated inside the outer sleeve 1 , and the second steel bar 6 and the second screw segment 61 are arranged opposite to the other end of the outer sleeve 1 .

[0043] 4. Figure 7As shown, the second inner sleeve 3 is slid to the right, so that the extension sleeve 31 extends from the inside of the outer sleeve 1 and docks with the second screw segment 61. Then, the extension sleeve 31 is rotated to thread the second screw segment 61 onto the second inner sleeve 3. In this way, the first steel bar 5 is connected to the first inner sleeve 2, and the second steel bar 6 is connected to the second inner sleeve 3. In this connection method, the first steel bar 5 and the second steel bar 6 do not need to be moved, rotated, or pulled. Only the first inner sleeve 2 and the second inner sleeve 3 need to be adapted to stretch and rotate to achieve a mechanical connection, which is convenient and fast.

[0044] 5. If Figure 3 As shown, rotate the locking nut 4 to move the locking nut 4 to the right, driving the first inner sleeve 2 to move right until the first inner sleeve 2 abuts the second inner sleeve 3, achieving complete fixation, and fixing the outer sleeve 1, the first inner sleeve 2 and the second inner sleeve 3 as a whole.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A concentric and coaxial tool for steel bar butt joint, characterized in that : The outer sleeve comprises an outer sleeve and an inner sleeve assembly, wherein the inner sleeve assembly comprises a first inner sleeve and a second inner sleeve, and a stepped through hole is provided in the outer sleeve, wherein the stepped through hole comprises a first through hole and a second through hole, and the diameter of the first through hole is larger than the diameter of the second through hole; The first inner sleeve is slidably arranged on the inner wall of the through hole 1, and an extension sleeve is provided at one end of the second inner sleeve. The second inner sleeve is slidably arranged on the inner wall of the through hole 1, and the extension sleeve is slidably arranged on the inner wall of the through hole 2; The outer wall of the first inner sleeve is evenly distributed with a plurality of sliders, and the circumference of the outer sleeve is evenly distributed with a plurality of sliding grooves corresponding to the sliders, and the sliders are slidably arranged in the sliding grooves; The inner wall of the first inner sleeve is threadedly connected to a first steel bar, and the inner wall of the second inner sleeve is threadedly connected to a second steel bar.

2. The concentric and coaxial tool for butting steel bars according to claim 1, characterized in that: The outer sleeve is provided with an external thread section and a fixed cylinder section along the length direction, and the external thread section is provided on the side where the slide groove is located; a locking nut is threadedly connected to the external thread section, and one end of the locking nut is provided close to the slider.

3. The concentric and coaxial tool for butting steel bars according to claim 2, characterized in that: A threaded hole 1 is provided on the locking nut, a limiting screw is provided in the threaded hole 1, and the limiting screw extends into the sliding groove.

4. The concentric and coaxial tool for butting steel bars according to claim 2, characterized in that: The fixed cylinder section is configured to be in the shape of a regular polygon.

5. The concentric and coaxial tool for butting steel bars according to claim 2, characterized in that: The extension sleeve is configured to be in the shape of a regular polygon.

6. The concentric and coaxial tool for butting steel bars according to claim 2, characterized in that: When the slider is set close to one end of the slide groove away from the fixed barrel section, the first inner sleeve extends out of the outer sleeve, and the second inner sleeve and the extension sleeve can be received inside the outer sleeve; when the slider is set close to one end of the slide groove close to the fixed barrel section, the extension sleeve extends out of the outer sleeve, and the first inner sleeve can be received inside the outer sleeve.

7. The concentric and coaxial tool for butting steel bars according to claim 1, characterized in that: A first screw segment is provided at one end of the first steel bar, and a second screw segment is provided at one end of the second steel bar; a first internal threaded hole is provided inside the first inner sleeve, and a second internal threaded hole is provided inside the second inner sleeve and the extension sleeve; the first screw segment is provided in the first internal threaded hole, and the second screw segment is provided in the second internal threaded hole.

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