Quick-connection tensile fastening structure

Abstract

The utility model belongs to the technical field of fasteners and discloses a quick-connection tensile fastening structure which comprises a first sleeve, a second sleeve, an inserting rod, a connecting sleeve, an elastic piece and a spring. The inserting rod comprises a connecting part and an inserting part, and external threads are arranged on the outer walls of the connecting part and the inserting part; a first through hole allowing the inserting part to penetrate through is formed in the middle of the connecting sleeve, the diameter of the first through hole is larger than that of the inserting part, and external threads are arranged on the outer wall of the connecting sleeve; the elastic piece comprises a base and an elastic part, the base and the elastic part are hollow, and a through open slot is formed in the base and the elastic part; the inner wall of the elastic part is provided with an internal thread matched with the inserting part of the inserting rod, and the diameter of the elastic part is gradually reduced from the end connected with the base to the free end. According to the uplift pile connecting device, rapid and stable connection between piles is achieved, the quality problem caused by manual welding is avoided, the connecting strength is guaranteed, the connecting safety of uplift piles is improved, operation is easy and convenient, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fastener, and relates to a quick connection tensile fastening structure. BACKGROUND

[0002] The prefabricated pile is universally used in construction engineering construction and is an indispensable building component. When the prefabricated pile is used, the length of a single prefabricated pile is limited, and therefore, the pile needs to be connected for actual use. The pile connection refers to connecting the ends of two adjacent prefabricated piles to lengthen the pile body.

[0003] The current pile connection structure of the prefabricated pile is generally connected by welding the upper end plate and the lower end plate. The welding connection of the upper end plate and the lower end plate has poor shearing resistance, pullout resistance and bending resistance. In addition, the welding connection is easily corroded because it is exposed to the outside. Moreover, the welding connection has high technical requirements for the construction workers and requires high labor intensity of the construction workers, and therefore, the production efficiency is low. INVENTION CONTENTS

[0004] The utility model discloses a quick connection tensile fastening structure, which realizes the quick connection of piles by a first sleeve, a second sleeve, a plug rod, a connecting sleeve, an elastic piece and a spring, can be free of welding during on-site installation, and has the characteristics of simple structure, high tensile fastening force and the like.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A quick connection tensile fastening structure, comprising a first sleeve, a second sleeve, a plug rod, a connecting sleeve, an elastic piece and a spring.

[0007] The plug rod comprises a connecting portion and a plug-in portion fixed on the connecting portion, and outer threads are arranged on the outer walls of the connecting portion and the plug-in portion.

[0008] A first through hole for allowing the plug-in portion of the plug rod to pass through is arranged in the middle portion of the connecting sleeve, the diameter of the first through hole is greater than the diameter of the plug-in portion, and outer threads are arranged on the outer wall of the connecting sleeve.

[0009] The elastic piece comprises a base and an elastic portion fixed on the base, the base and the elastic portion are hollow, an open slot is arranged in the base and the elastic portion, inner threads matched with the plug-in portion of the plug rod are arranged on the inner walls of the base and the elastic portion, and the diameter of the elastic portion gradually decreases from one end connected with the base to the free end.

[0010] The first sleeve is hollow, one end of the first sleeve is open, a first sleeve bottom is arranged at the other end, a second through hole for allowing a reinforcing bar to pass through is arranged on the first sleeve bottom, and inner threads matched with the connecting portion of the plug rod are arranged on the inner wall of the first sleeve.

[0011] The second sleeve is hollow inside, one end of the second sleeve is open, the other end is provided with a second sleeve bottom, a third through hole for the steel bar to pass through is arranged on the second sleeve bottom, and an internal thread matched with the connecting sleeve is arranged on the inner wall of the second sleeve;

[0012] The connecting part of the insertion rod is threadedly connected with the first sleeve, the connecting sleeve is threadedly connected with the second sleeve, the spring and the elastic piece are arranged in the second sleeve, one end of the spring abuts against the second sleeve bottom, the other end abuts against the base of the elastic piece, the elastic part of the elastic piece abuts against the connecting sleeve, the insertion part of the insertion rod is threadedly connected with the elastic piece after passing through the first through hole of the connecting sleeve, and the first sleeve and the second sleeve are butted.

[0013] As a limitation, one end of the insertion part of the insertion rod, away from the connecting part, is a circular truncated cone plug, and the diameter of the circular truncated cone plug gradually decreases in the direction away from the insertion part; and the diameter of the free end of the circular truncated cone plug is less than or equal to the diameter of the free end of the elastic part of the elastic piece.

[0014] As a further limitation, the outer surface of one end of the insertion part, connected with the connecting part, is provided with a mounting protrusion.

[0015] As a further limitation, the mounting protrusion is an outer N-angled protrusion, and N is greater than or equal to 5.

[0016] As a second limitation, the first through hole of the connecting sleeve is formed with a mounting groove.

[0017] As a further limitation, the mounting groove is an inner M-angled groove, and M is greater than or equal to 5.

[0018] As a further limitation, the inner wall of the first through hole of the connecting sleeve is provided with a limiting protrusion matched with the outer side of the elastic part.

[0019] As a third limitation, at least one strip-shaped groove is arranged on the elastic part of the elastic piece in the axial direction, and the strip-shaped groove extends to the base.

[0020] As a further limitation, one end of the base of the elastic piece, away from the elastic part, is provided with a groove for abutting against the spring.

[0021] As a fourth limitation, the outer side of one end of the first sleeve and the second sleeve is circular, and the outer side of the first sleeve and the second sleeve is prismatic in the area other than the circular area.

[0022] Compared with the prior art, the technical progress achieved by the utility model lies in that:

[0023] (1) The utility model discloses a first sleeve, second sleeve, plug rod, connecting sleeve, elastic member and spring, wherein the connecting part of plug rod is screwed with the first sleeve, connecting sleeve is screwed with the second sleeve, elastic member and spring are placed in the second sleeve, the base of spring and elastic member abuts, the elastic part of elastic member and connecting sleeve abut, through the abutment of spring and the base of elastic member, can be convenient for the plug -in part of plug rod to pass through connecting sleeve and be screwed with elastic member, the butt joint of first sleeve and second sleeve realizes the quick connection of pile and pile, in addition, because the elastic part of elastic member and connecting sleeve abut, when the plug -in part is connected with elastic member, the part of elastic part of elastic member and connecting sleeve contact is stressed and changes, improves the anti -pulling performance between each component, namely, when the first sleeve and second sleeve are under the tension, the plug -in part of elastic member and plug rod is screwed, elastic member is stressed to the first sleeve direction, connecting sleeve and second sleeve are screwed, and elastic member is stressed and deformed under the action of the limiting protrusion in connecting sleeve, and elastic member is tightened, and the pressure is applied to the inside and is increased, so that elastic member and plug rod are connected more firmly, and then the first sleeve and second sleeve are connected more firmly.

[0024] (2) The end of the plug-in part of the plug rod away from the connecting part is a circular truncated cone plug, the diameter of the free end of the circular truncated cone plug is less than or equal to the diameter of the free end of the elastic part of the elastic member, by setting the circular truncated cone plug, when the plug-in part of the plug rod passes through the connecting sleeve and is screwed with the elastic member, the plug-in part of the plug rod can pass through the elastic part of the elastic member to realize screw connection.

[0025] (3) The outer surface of one end of the plug-in part of the plug rod connected with the connecting part is provided with a mounting lug, when the connecting part of the plug rod is screwed with the first sleeve, a wrench matched with the mounting lug can be used to rotate and install the connecting part of the plug rod into the first sleeve, a mounting groove is formed in the first through hole of the connecting sleeve, when the connecting sleeve is screwed with the second sleeve, a wrench matched with the mounting groove can be used to rotate and install the connecting sleeve into the second sleeve.

[0026] In summary, the utility model discloses a first sleeve, second sleeve, plug rod, connecting sleeve, elastic member and spring realize the quick stable connection of pile and pile, avoid the quality problem brought by manual welding, guarantee the connection strength, improve the connection safety of anti -pulling pile, and simple and convenient operation improves construction efficiency. ACCURACY OF DRAWINGS

[0027] Figure 1 As shown is the combined schematic diagram of the utility model embodiment quick -connection anti -tension fastening structure;

[0028] Figure 2 As shown is the cross -sectional view of the utility model embodiment quick -connection anti -tension fastening structure after assembly;

[0029] Figure 3 Fig. 1 is a structural schematic diagram of the insertion rod according to an embodiment of the present application;

[0030] Figure 4 Fig. 2 is a structural schematic diagram of the elastic member according to an embodiment of the present application;

[0031] Figure 5 Fig. 3 is another angle structural schematic diagram of the elastic member according to an embodiment of the present application;

[0032] Figure 6 Fig. 4 is a structural schematic diagram of the connecting sleeve according to an embodiment of the present application;

[0033] Figure 7 Fig. 5 is a sectional view of the connecting sleeve according to an embodiment of the present application;

[0034] Figure 8 Fig. 6 is a structural schematic diagram of the first sleeve according to an embodiment of the present application;

[0035] Figure 9 Fig. 7 is another angle structural schematic diagram of the first sleeve according to an embodiment of the present application;

[0036] Figure 10 Fig. 8 is a structural schematic diagram of the second sleeve according to an embodiment of the present application;

[0037] Figure 11 Fig. 9 is another angle structural schematic diagram of the second sleeve according to an embodiment of the present application;

[0038] In the figure: 1, insertion rod; 11, connecting part; 12, insertion part; 13, round table-shaped plug; 14, mounting protrusion; 2, elastic member; 21, base; 22, elastic part; 23, open slot; 24, strip-shaped slot; 25, groove; 3, connecting sleeve; 31, first through hole; 32, mounting slot; 33, limiting protrusion; 4, spring; 5, first sleeve; 51, first sleeve bottom; 52, second through hole; 6, second sleeve; 61, second sleeve bottom; 62, third through hole. DETAILED DESCRIPTION

[0039] In order to better explain the present application, so as to facilitate understanding, the present application is described in detail below by specific embodiments in combination with the drawings.

[0040] Embodiment: a quick connection anti-tension fastening structure

[0041] As shown in Figure 1 and Figure 2 The present embodiment is a quick connection anti-tension fastening structure, which comprises a first sleeve 5, a second sleeve 6, an insertion rod 1, a connecting sleeve 3, an elastic member 2 and a spring 4.

[0042] As shown in Figure 3As shown, the insertion rod 1 comprises a connecting portion 11 and an insertion portion 12 fixed on the connecting portion 11, and outer threads are arranged on the outer walls of the connecting portion 11 and the insertion portion 12. The end of the insertion portion 12 away from the connecting portion 11 is a circular truncated cone-shaped plug 13, and the diameter of the circular truncated cone-shaped plug 13 gradually decreases in the direction away from the insertion portion 12. An installation protrusion 14 is arranged around the outer surface of the end of the insertion portion 12 connected to the connecting portion 11, wherein the installation protrusion 14 is an outer dodecagonal protrusion.

[0043] As shown in Figure 4 and Figure 5 , the elastic member 2 comprises a base 21 and an elastic portion 22 fixed on the base 21, the base 21 and the elastic portion 22 are hollow inside, and an open slot 23 is arranged on the base 21 and the elastic portion 22. Inner threads matched with the insertion portion 12 of the insertion rod 1 are arranged on the inner walls of the base 21 and the elastic portion 22. The diameter of the elastic portion 22 gradually decreases from the end connected to the base 21 to the free end, wherein the diameter of the free end of the elastic portion 22 is greater than or equal to the diameter of the free end of the circular truncated cone-shaped plug 13 on the insertion portion 12, so as to facilitate the insertion of the insertion portion 12 of the insertion rod 1 into the elastic portion 22 and further threadedly connect the elastic portion 22 and the base 21.

[0044] In this embodiment, a groove 25 for abutting against the spring 4 is arranged on the end of the base 21 away from the elastic portion 22. At least one strip-shaped slot 24 is further arranged on the elastic portion 22 in the axial direction, and the strip-shaped slot 24 extends to the base 21, Figure 4 and Figure 5 In this embodiment, three strip-shaped slots 24 are arranged on the elastic portion 22, and the elastic portion 22 is divided into four interval arranged petals by the strip-shaped slots 24 and the open slot 23.

[0045] As shown in Figure 6 and Figure 7 , the middle part of the connecting sleeve 3 is provided with a first through hole 31 for the insertion portion 12 of the insertion rod 1 to pass through, and the diameter of the first through hole 31 is greater than the diameter of the insertion portion 12. Outer threads are arranged on the outer wall of the connecting sleeve 3, and an installation groove 32 is formed in the first through hole 31 of the connecting sleeve 3, and the installation groove 32 is an inner dodecagonal groove. Limiting protrusions 33 matched with the outer side angle of the elastic portion 22 are further arranged on the inner wall of the first through hole 31 of the connecting sleeve 3.

[0046] As shown in Figure 8 and Figure 9 , the first sleeve 5 is hollow inside, one end of the first sleeve 5 is open, and the other end is provided with a first sleeve bottom 51, and a second through hole 52 for the steel bar to pass through is arranged on the first sleeve bottom 51. Inner threads matched with the connecting portion 11 of the insertion rod 1 are arranged on the inner wall of the first sleeve 5.

[0047] As shown in Figure 10 and Figure 11As shown, the second sleeve 6 is hollow inside, one end of the second sleeve 6 is open, the other end is provided with a second sleeve bottom 61, and the second sleeve bottom 61 is provided with a third through hole 62 for the steel bar to pass through; the inner wall of the second sleeve 6 is provided with an internal thread matched with the connecting sleeve 3.

[0048] Wherein, the outer surface of the abutting end of the first sleeve 5 and the second sleeve 6 is circular, which can facilitate the abutment of the first sleeve 5 and the second sleeve 6, and the outer surface of the first sleeve 5 and the second sleeve 6 is prismatic in the area other than the circular area, which can prevent the first sleeve 5 and the second sleeve 6 from rotating, and the first sleeve 5 and the second sleeve 6 are both octagonal in the figure. The length of the first sleeve 5 can be shorter than the second sleeve 6, or consistent with the second sleeve 6.

[0049] In this embodiment, the connecting part 11 of the insertion rod 1 is threadedly connected with the first sleeve 5, the connecting sleeve 3 is threadedly connected with the second sleeve 6, one end of the connecting sleeve 3 provided with the mounting groove 32 faces the insertion rod 1, the spring 4 and the elastic member 2 are both placed in the second sleeve 6, one end of the spring 4 abuts against the second sleeve bottom 61 of the second sleeve 6, the other end abuts against the recess 25 on the base 21 of the elastic member 2, the elastic part 22 of the elastic member 2 abuts against the connecting sleeve 3, the insertion part 12 of the insertion rod 1 is threadedly connected with the elastic member 2 after passing through the connecting sleeve 3, and is used for abutting the first sleeve 5 and the second sleeve 6.

[0050] In this embodiment, the mounting protrusion 14 is an outer dodecagonal protrusion, and the mounting groove 32 is an inner dodecagonal groove. In practice, the mounting protrusion 14 can be an outer N-angled protrusion, and N≥5, and the mounting groove 32 can be an inner M-angled groove, and M≥5.

[0051] The use process of this embodiment is as follows:

[0052] When two precast piles are connected by the quick connection anti-tension fastening structure of the embodiment, first, the reinforcing steel of one of the precast piles is passed through the second through hole 52 of the first sleeve 5, and the end of the reinforcing steel is upset; then the reinforcing steel of the other precast pile is passed through the third through hole 62 of the second sleeve 6, and the end of the reinforcing steel is upset, so as to fix the first sleeve 5 and the second sleeve 6 to the corresponding precast piles. Then the spring 4 is placed in the second sleeve 6, and then the elastic member 2 is placed, so that the spring 4 abuts against the groove 25 on the base 21 of the elastic member 2; then the connecting sleeve 3 and the second sleeve 6 are threadedly connected by using a wrench matched with the installation groove 32; the connecting part 11 of the inserting rod 1 is threadedly connected with the first sleeve 5 by using a wrench matched with the installation protrusion 14; then the inserting part 12 of the inserting rod 1 is threadedly connected with the elastic member 2 by passing through the first through hole 31 of the connecting sleeve 3, since the diameter of the first through hole 31 of the connecting sleeve 3 is greater than the diameter of the free end of the elastic part 22, and the inner wall of the first through hole 31 is provided with a limiting protrusion 33, when the inserting part 12 of the inserting rod 1 is threadedly connected with the elastic member 2, the elastic part 22 of the elastic member 2 further abuts against the connecting sleeve 3, so that the elastic part 22 is deformed under force, and the inserting part 12 of the inserting rod 1 is more tightly threadedly connected, so that the first sleeve 5 and the second sleeve 6 are tightly connected, and the precast piles are fixedly connected.

[0053] It should be noted that the above only describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A quick-connect tensile-resistant fastening structure characterized by, The utility model relates to a steel bar connecting device, including first sleeve, second sleeve, plug rod, connecting sleeve, elastic piece and spring, The plug rod includes a connecting portion and a plug-in portion fixed on the connecting portion, and outer threads are arranged on the outer walls of the connecting portion and the plug-in portion; The middle part of the connecting sleeve is provided with a first through hole for the plug-in portion of the plug rod to pass through, and the diameter of the first through hole is larger than that of the plug-in portion, and outer threads are arranged on the outer wall of the connecting sleeve; The elastic piece includes a base and an elastic portion fixed on the base, the base and the elastic portion are hollow, and an opening slot is arranged on the base and the elastic portion, inner threads matched with the plug-in portion of the plug rod are arranged on the inner walls of the base and the elastic portion, and the diameter of the elastic portion gradually decreases from one end connected with the base to the free end; The first sleeve is hollow, one end of the first sleeve is open, the other end is provided with a first bottom, a second through hole for the steel bar to pass through is arranged on the first bottom, and inner threads matched with the connecting portion of the plug rod are arranged on the inner wall of the first sleeve; The second sleeve is hollow, one end of the second sleeve is open, the other end is provided with a second bottom, a third through hole for the steel bar to pass through is arranged on the second bottom, and inner threads matched with the connecting sleeve are arranged on the inner wall of the second sleeve; The connecting portion of the plug rod is threadedly connected with the first sleeve, the connecting sleeve is threadedly connected with the second sleeve, the spring and the elastic piece are arranged in the second sleeve, one end of the spring abuts against the second bottom of the second sleeve, the other end abuts against the base of the elastic piece, the elastic portion of the elastic piece abuts against the connecting sleeve, the plug-in portion of the plug rod is threadedly connected with the elastic piece after passing through the first through hole of the connecting sleeve, and the first sleeve and the second sleeve are butted.

2. The quick connect tension-resistant fastening structure according to claim 1, wherein The end of the plug-in portion of the plug rod away from the connecting portion is a circular truncated cone-shaped plug, and the diameter of the circular truncated cone-shaped plug gradually decreases in the direction away from the plug-in portion; the diameter of the free end of the circular truncated cone-shaped plug is less than or equal to the diameter of the free end of the elastic portion of the elastic piece.

3. The quick connect tension-resistant fastening structure according to claim 2, wherein An installation protrusion is arranged on the outer surface of the end of the plug-in portion connected with the connecting portion.

4. The quick connect tension-resistant fastening structure according to claim 3, wherein The installation protrusion is an outer N-angled protrusion, and N is greater than or equal to 5.

5. The quick connect tension-resistant fastening structure according to claim 1, wherein An installation groove is formed in the first through hole of the connecting sleeve.

6. The quick connect tension-resistant fastening structure according to claim 5, wherein The installation groove is an inner M-angled groove, and M is greater than or equal to 5.

7. The quick connect tension-resistant fastening structure according to claim 6, wherein A limiting protrusion matched with the outer side of the elastic portion is arranged on the inner wall of the first through hole of the connecting sleeve.

8. The quick connect tension-resistant fastening structure according to claim 1, wherein At least one strip-shaped slot is arranged on the elastic portion of the elastic piece in the axial direction, and the strip-shaped slot extends to the base.

9. The quick connect tension-resistant fastening structure according to claim 8, wherein A groove for abutting against the spring is arranged on the end of the base away from the elastic portion.

10. The quick connect tension-resistant fastening construction of claim 1, wherein, The outer sides of the butted ends of the first sleeve and the second sleeve are circular, and the outer sides of the first sleeve and the second sleeve are prismatic in the areas different from the circular areas.

Images