CN112610580B - an expansion bolt - Google Patents

Abstract

The invention relates to the field of bolts, in particular to an expansion bolt which comprises a bolt main body assembly, an outer adjusting assembly and an inner adjusting assembly, wherein the outer adjusting assembly and the inner adjusting assembly are arranged in the bolt main body assembly, an outer adjusting sleeve and an inner adjusting sleeve in the outer adjusting assembly and the inner adjusting assembly can drive a first sliding block and a second sliding block to slide in an adjusting groove, when the first sliding block and the second sliding block can slide, the distance between the first sliding block and the second sliding block can be adjusted through the outer adjusting sleeve and the inner adjusting sleeve, after the distance between the first sliding block and the second sliding block is changed, an included angle between a first expansion rod and a second expansion rod is changed, the first expansion rod and the second expansion rod extend outwards, the traditional support mode of the expansion bolt is replaced, the contact area between an outer shell and a floor can be effectively increased, and the connection of the expansion bolt can be more stable.

Description

an expansion bolt

technical field

The invention relates to the field of bolts, in particular to an expansion bolt.

Background technique

Expansion bolt is a special threaded connection used to fix pipeline supports/hangers/brackets or equipment on walls, floors, and columns.

Most of the existing expansion bolts used on the floor are to insert the outer casing into the floor and then stretch the outer casing through the inserted inner bolt, so as to insert the outer casing on the floor. Because the thickness of the floor is different and the floor The hardness of the floor is different. When the thickness of the floor is thin, there are fewer contact points between the area where the outer shell is stretched and the floor, which will cause the floor to be unable to effectively fix the outer shell stably, so that the expansion bolts cannot effectively hang objects. .

Contents of the invention

Aiming at the problems in the prior art, the invention provides an expansion bolt.

The technical solution adopted by the present invention to solve the technical problem is: an expansion bolt, including a bolt main assembly, an external adjustment assembly and an internal adjustment assembly, the external adjustment assembly is arranged inside the bolt main assembly, and the internal adjustment assembly The assembly is arranged inside the outer adjustment assembly, and the bolt body assembly includes an outer shell, an inner bolt, a tapered insertion end, a groove, a nut and an adjustment groove, and an internal thread is provided on the side wall of the inner circle of the outer shell , the inside of the outer casing is provided with inner bolts, the top of the outer casing is provided with a tapered plug-in end, the bottom of the tapered plug-in end is provided with a groove corresponding to the inner bolt, and the inside of the groove corresponds to the inner bolt. The external thread on the outer wall of the bolt is provided with an internal thread, and the internal bolt thread is inserted into the inside of the groove, and the end of the internal bolt away from the tapered insertion end extends out of the outer casing, and the inner bolt extends out of the outer casing A nut is threaded on the outer wall of one end, and several adjusting grooves are opened at equal intervals on the outer wall of the outer shell.

Specifically, the outer adjusting assembly includes an outer adjusting sleeve, a first sliding block, a first limit sliding block, a first annular limit slide groove, a hinge protrusion, a first pin shaft, a first expansion rod, a second It consists of a pin shaft and a second expansion rod. The inner and outer walls of the outer adjustment sleeve are respectively provided with internal threads and outer threads. The outer adjustment sleeve is threadedly inserted into the outer shell, and the The outer adjusting sleeve is threadedly connected with the outer casing, and one end inside the adjusting groove is slidably connected with a first sliding block, and the side wall of the first sliding block close to the outer adjusting sleeve is fixedly connected with a first stop The slider, the outer cylinder wall of the outer adjustment sleeve is provided with a first annular limit chute corresponding to the first limit slider, and the first annular limit chute is matched with the first limit slider , the top of the first sliding block is fixedly connected with a hinged projection, and both sides of the top of the hinged projection are provided with a first expansion rod, and the first expansion rod is hinged with the hinged projection through a first pin shaft, two One end of the first expansion rod away from the hinged projection is hinged with a second expansion rod through a second pin, and the second expansion rod is arranged between the two first expansion rods, and the length of the second expansion rod is longer than The length of the first expansion rod.

Specifically, the inner adjusting assembly includes an inner adjusting sleeve, a second sliding block, a second limit sliding block, a second annular limit chute, a hinged concave block, a hinged groove and a third pin. The inner cylinder wall and the outer cylinder wall of the adjustment sleeve are provided with internal threads and external threads respectively, and the inner adjustment sleeve is threadedly inserted into the inside of the outer adjustment sleeve, and the inner adjustment sleeve is threaded into the inner bolt On the outer wall of the adjustment groove, a second slider is slidably connected to the inner top of the adjustment groove, and a second limit slider is fixedly connected to the side wall of the second slider near the side of the inner adjustment sleeve. The outer cylinder wall of the sleeve is provided with a second annular limit chute corresponding to the second limit slider, the bottom of the second slide block is fixedly connected with a hinged concave block, and the bottom of the hinged concave block is opened with a hinge groove The end of the second expansion rod away from the second pin extends to the inside of the hinge groove, and the end of the second expansion rod extending to the inside of the hinge groove is hinged to the hinge recess through the third pin.

Specifically, a plurality of support blocks are fixedly connected to one end of the tapered plug-in end close to the outer shell at equal intervals, and connecting grooves are provided on the inner wall of the outer shell corresponding to the support blocks, and the connecting grooves are matched with the support blocks. .

Specifically, a washer is provided between the nut and the outer shell, and the washer is sleeved on one end of the inner bolt extending out of the outer shell.

Specifically, the diameter of the tapered plug-in end is larger than the inner diameter of the outer casing.

Beneficial effects of the present invention:

(1) For an expansion bolt according to the present invention, through the outer adjustment assembly and the inner adjustment assembly arranged inside the bolt body assembly, the outer adjustment assembly and the inner adjustment sleeve in the inner adjustment assembly can drive the first The first sliding block and the second sliding block slide in the inside of the adjustment groove, and when the first sliding block and the second sliding block can slide, the first sliding block and the second sliding block can be adjusted through the outer adjustment sleeve and the inner adjustment sleeve. The distance between the sliding blocks, the angle between the first expansion rod and the second expansion rod changes after the distance between the first sliding block and the second sliding block changes, and the first expansion rod and the second expansion rod move towards Outward extension, instead of the traditional expansion bolt support method, can effectively increase the contact area between the outer shell and the floor, can make the expansion bolt connection more stable, and because the first sliding block and the second sliding block can be adjusted in the adjustment slot Internal sliding, so that the depth of expansion bolt insertion can be adjusted as needed.

(2) The expansion bolt described in the present invention can effectively improve the overall strength of the expansion bolt by replacing the traditional plastic outer casing with the metal casing in the bolt body assembly.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the structural representation when a kind of expansion bolt provided by the present invention is used;

Fig. 2 is the structural representation of a kind of expansion bolt provided by the present invention;

Fig. 3 is a partial enlarged view of part A in Fig. 2 of an expansion bolt provided by the present invention;

Fig. 4 is a structural schematic diagram of a conical insertion end of an expansion bolt provided by the present invention;

Fig. 5 is a schematic diagram of the internal structure of the outer casing of an expansion bolt provided by the present invention;

Fig. 6 is a schematic diagram of the connection structure of the first expansion rod and the second expansion rod in an expansion bolt provided by the present invention;

Fig. 7 is a structural schematic diagram of an outer adjustment sleeve and an inner adjustment sleeve in an expansion bolt provided by the present invention.

In the figure: 1. Bolt body assembly; 11. Outer shell; 12. Inner bolt; 13. Tapered insertion end; 14. Groove; 15. Support block; 16. Connection groove; 17. Washer; 18. Nut ;19, adjustment groove; 2, external adjustment assembly; 21, external adjustment sleeve; 22, first sliding block; 23, first limit slider; 24, first annular limit chute; 25, hinged bump ; 26, the first pin; 27, the first expansion rod; 28, the second pin; 29, the second expansion rod; 3, the inner adjustment assembly; 31, the inner adjustment sleeve; 32, the second sliding block; 33 , the second limit slider; 34, the second annular limit chute; 35, the hinged concave block; 36, the hinged groove; 37, the third pin.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

As shown in Figures 1-7, an expansion bolt according to the present invention includes a bolt body assembly 1, an outer adjustment assembly 2 and an inner adjustment assembly 3, and the outer adjustment assembly 2 is arranged inside the bolt body assembly 1 , and the inner adjustment assembly 3 is arranged inside the outer adjustment assembly 2, the bolt body assembly 1 includes an outer shell 11, an inner bolt 12, a tapered insertion end 13, a groove 14, a nut 18 and an adjustment groove 19 , the side wall of the inner circle side of the outer shell 11 is provided with an internal thread, the inner bolt 12 is arranged inside the outer shell 11, and the top of the outer shell 11 is provided with a tapered insertion end 13, the cone The bottom of the plug-in end 13 is provided with a groove 14 corresponding to the inner bolt 12, and the inside of the groove 14 is provided with an inner thread corresponding to the outer thread on the outer wall of the inner bolt 12, and the inner bolt 12 is threadedly inserted into the groove. 14, the inner bolt 12 extends out of the outer shell 11 from one end away from the tapered insertion end 13, and the outer wall of the inner bolt 12 extending out of the outer shell 11 is threaded with a nut 18, the outer shell The outer wall of the body 11 is provided with several adjusting slots 19 at equal intervals, and the tapered plug-in end 13 on the top of the outer body 11 can facilitate the insertion of the outer body 11 into the wall, which facilitates the use of the outer body 11 .

Specifically, the outer adjusting assembly 2 includes an outer adjusting sleeve 21, a first sliding block 22, a first limit sliding block 23, a first annular limit chute 24, a hinged projection 25, a first pin shaft 26, The first expansion rod 27, the second pin shaft 28 and the second expansion rod 29 are composed of an internal thread and an external thread on the inner wall and the outer wall of the outer adjustment sleeve 21 respectively. 21 is threadedly inserted into the inside of the outer casing 11, and the outer adjustment sleeve 21 is threadedly connected with the outer casing 11, and one end of the adjustment groove 19 is slidably connected with a first sliding block 22, and the first sliding block 22 A first limit slider 23 is fixedly connected to the side wall close to the side of the outer adjustment sleeve 21, and a first annular limiter is provided on the outer cylinder wall of the outer adjustment sleeve 21 corresponding to the first limit slider 23. chute 24, the first annular limit chute 24 is matched with the first limit slider 23, the top of the first slider 22 is fixedly connected with a hinged projection 25, and the two hinged projections 25 top Both sides are provided with a first expansion rod 27, the first expansion rod 27 is hinged with the hinged projection 25 through the first pin shaft 26, and one end of the two first expansion rods 27 away from the hinged projection 25 is passed through the second pin The shaft 28 is hinged with a second expansion rod 29, the second expansion rod 29 is arranged between the two first expansion rods 27, the length of the second expansion rod 29 is greater than the length of the first expansion rod 27, and the outer adjustment assembly 2. The outer adjusting sleeve 21 inside the outer casing 11 can rotate, and the outer adjusting sleeve 21 can drive the first sliding block 22 through the first limiting slider 23 inside the first annular limiting chute 24 when rotating. Lifting and lowering is carried out inside the adjusting tank 19 .

Specifically, the inner adjusting assembly 3 includes an inner adjusting sleeve 31, a second sliding block 32, a second limit sliding block 33, a second annular limit chute 34, a hinged concave block 35, a hinged groove 36 and a third pin shaft 37, the inner cylinder wall and the outer cylinder wall of the inner adjustment sleeve 31 are respectively provided with internal threads and external threads, and the inner adjustment sleeve 31 is screwed into the inside of the outer adjustment sleeve 21, and the The inner adjustment sleeve 31 is threaded on the outer wall of the inner bolt 12, and the inner top of the adjustment groove 19 is slidably connected with a second sliding block 32, and the second sliding block 32 is close to the side of the inner adjustment sleeve 31. A second limit slider 33 is fixedly connected to the side wall, and a second annular limit chute 34 is provided on the outer cylinder wall of the inner adjustment sleeve 31 corresponding to the second limit slider 33. The bottom of the block 32 is fixedly connected with a hinged concave block 35, and the bottom of the hinged concave block 35 is provided with a hinged groove 36, and the end of the second expansion rod 29 away from the second pin shaft 28 extends to the inside of the hinged groove 36, and One end of the second expansion rod 29 extending to the inside of the hinge groove 36 is hinged with the hinge concave block 35 through the third pin shaft 37. When the inner adjustment sleeve 31 in the inner adjustment assembly 3 rotates inside the outer adjustment sleeve 21, the inner The adjusting sleeve 31 can drive the second sliding block 32 to move up and down inside the adjusting groove 19 through the second limiting slider 33 inside the second annular limiting chute 34 .

Specifically, a plurality of support blocks 15 are fixedly connected to one end of the tapered plug-in end 13 close to the outer shell 11 at equal intervals, and the inner wall of the outer shell 11 is provided with a connecting groove 16 corresponding to the support block 15, and the connecting groove 16 is matched with the support block 15. When the inner bolt 12 is stretched outward, it can drive the tapered plug-in end 13 of the threaded connection to move toward the inside of the outer shell 11. When the tapered plug-in end 13 is stretched outward At this time, the support block 15 can be driven to spread the outer casing 11 along the connecting groove 16, so that the outer casing 11 will not be separated from the inside of the wall.

Specifically, a washer 17 is provided between the nut 18 and the outer shell 11, and the washer 17 is sleeved on one end of the inner bolt 12 extending out of the outer shell 11, and the washer 17 can increase the size of the fitting and the nut 18 and the shell. The contact area between the bodies 11 can effectively make the connection between the nut 18 and the outer shell 11 more stable.

Specifically, the diameter of the tapered insertion end 13 is larger than the inner diameter of the outer casing 11, which can effectively prevent the tapered insertion end 13 from sliding into the inside of the outer casing 11, and effectively enable the tapered insertion end 13 to Internal bolts 12 provide support.

When in use, as shown in FIG. 2 in the initial state, both the first expansion rod 27 and the second expansion rod 29 are located inside the adjustment groove 19 and at a central position. First, the tapered plug-in end 13 is in contact with the floor, Because the top of the tapered plug-in end 13 is sharp, the tapered plug-in end 13 can facilitate the insertion of the outer shell 11 into the floor and pass through the floor. The sleeve 21 and the inner adjustment sleeve 31 are provided with an inner groove 14 on the inner wall of the end away from the tapered insertion end 13 to dial it, and the outer adjustment sleeve 21 moves toward the end close to the tapered insertion end 13, and The outer adjustment sleeve 21 can drive the inner adjustment sleeve 31 to move together. When the second sliding block 32 is in contact with the inner top wall of the adjustment groove 19, due to the jacking of the first sliding block 22, the hinged first expansion rod 27 can The included angle with the second expansion rod 29 is reduced, and the first expansion rod 27 and the second expansion rod 29 will extend outward along the second pin shaft 28, when the first expansion rod 27 is shown in Figure 1 state, and after the first expansion rod 27 is level, stop the rotation of the external adjustment sleeve 21, and finally, rotate the inner adjustment sleeve 31, and the inner adjustment sleeve 31 can drive the second sliding block 32 vertically downward when rotating Moving, the second sliding block 32 drives the hinged second expansion rod 29 to support the first expansion rod 27 and makes the first expansion rod 27 closely contact with the top of the floor, so that the first expansion rod 27 and the second expansion rod 29 will The outer shell 11 is precisely connected with the floor.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also There are various changes and improvements, and these changes and improvements all fall within the scope of protection of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. An expansion bolt is characterized by comprising a bolt main body assembly (1), an outer adjusting assembly (2) and an inner adjusting assembly (3), wherein the outer adjusting assembly (2) is arranged inside the bolt main body assembly (1), and the inner adjusting assembly (3) is arranged inside the outer adjusting assembly (2); the bolt main body assembly (1) comprises an outer shell (11), an inner bolt (12), a conical insertion end (13), a groove (14), a nut (18) and adjusting grooves (19), wherein an internal thread is formed in the side wall of the inner circle side of the outer shell (11), the inner bolt (12) is arranged inside the outer shell (11), the conical insertion end (13) is arranged at the top of the outer shell (11), the groove (14) is formed in the bottom of the conical insertion end (13) corresponding to the inner bolt (12), an internal thread is formed in the groove (14) corresponding to an external thread on the outer wall of the inner bolt (12), the inner bolt (12) is inserted into the groove (14) in a threaded manner, one end, far away from the conical insertion end (13), of the inner bolt (12) extends out of the outer shell (11), the nut (18) is sleeved on the external thread on the outer wall of one end, extending out of the outer shell (11), and the plurality of the adjusting grooves (19) are formed in an equidistant manner in the outer wall of the outer shell (11);

the outer adjusting assembly (2) comprises an outer adjusting sleeve (21), a first sliding block (22), a first limiting sliding block (23), a first annular limiting sliding groove (24), a hinge lug (25), a first pin shaft (26), a first expansion rod (27), a second pin shaft (28) and a second expansion rod (29), wherein an inner cylinder wall and an outer cylinder wall of the outer adjusting sleeve (21) are respectively provided with an internal thread and an external thread, the outer adjusting sleeve (21) is in threaded connection with the outer shell (11), one end inside the adjusting groove (19) is slidably connected with the first sliding block (22), the side wall of the first sliding block (22) close to one side of the outer adjusting sleeve (21) is fixedly connected with the first limiting sliding block (23), the outer cylinder wall of the outer adjusting sleeve (21) is provided with the first annular limiting sliding groove (24) corresponding to the first limiting sliding block (23), the first annular limiting sliding groove (24) is matched with the first limiting sliding block (23), the first limiting sliding block (25) is fixedly connected with the hinge lug (25), the hinge lug (25) at the top of the first limiting sliding block (27) is connected with the hinge lug (25), one ends, far away from the hinge lug (25), of the two first expansion rods (27) are hinged to second expansion rods (29) through second pin shafts (28), the second expansion rods (29) are arranged between the two first expansion rods (27), and the length of each second expansion rod (29) is larger than that of each first expansion rod (27);

the inner adjusting component (3) comprises an inner adjusting sleeve (31), a second sliding block (32), a second limiting sliding block (33), a second annular limiting sliding groove (34), a hinge concave block (35), a hinge groove (36) and a third pin shaft (37), the inner cylinder wall and the outer cylinder wall of the inner adjusting sleeve (31) are respectively provided with an internal thread and an external thread, the inner adjusting sleeve (31) is inserted in the outer adjusting sleeve (21) in a threaded manner, and the inner adjusting sleeve (31) is sleeved on the outer wall of the inner bolt (12) in a threaded manner, the inner top of the adjusting groove (19) is connected with a second sliding block (32) in a sliding way, a second limiting slide block (33) is fixedly connected on the side wall of one side of the second slide block (32) close to the inner adjusting sleeve (31), a second annular limiting sliding groove (34) is arranged on the outer cylinder wall of the inner adjusting sleeve (31) corresponding to the second limiting sliding block (33), the bottom of the second sliding block (32) is fixedly connected with a hinged concave block (35), the bottom of the hinge concave block (35) is provided with a hinge groove (36), one end of the second expansion rod (29) far away from the second pin shaft (28) extends to the inside of the hinge groove (36), and one end of the second expansion rod (29) extending to the inside of the hinge groove (36) is hinged with the hinge concave block (35) through a third pin shaft (37).

2. An expansion bolt according to claim 1, characterized in that: the utility model discloses a taper splicing device, including shell body (11), toper grafting end (13) are close to the equidistant fixedly connected with a plurality of bracer (15) of one end of shell body (11), spread groove (16) have been seted up corresponding bracer (15) on the inner wall of shell body (11), spread groove (16) and bracer (15) phase-match set up.

3. An expansion bolt according to claim 1, wherein: a gasket (17) is arranged between the nut (18) and the outer shell (11), and the gasket (17) is sleeved at one end, extending out of the outer shell (11), of the inner bolt (12).

4. An expansion bolt according to claim 1, wherein: the diameter of the conical insertion end (13) is larger than the inner diameter of the outer shell (11).

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