Elbow expansion bolt

Abstract

The utility model discloses an elbow expansion bolt, and relates to the field of bolts, the elbow expansion bolt comprises a sleeve assembly and a screw assembly installed in the sleeve assembly, the screw assembly comprises a connecting rod, the outer wall of the connecting rod is provided with an external thread, one end of the connecting rod is provided with a handle assembly, the sleeve assembly comprises a sleeve, and the sleeve is provided with an external thread. And a plurality of openings distributed at equal intervals are formed in the outer wall of the sleeve, one end of the connecting rod is in threaded connection with a threaded sleeve through external threads, and the threaded sleeve is of a conical structure. According to the expansion bolt, the handle assembly is arranged on the connecting rod, the screw assembly is conveniently assisted to rotate through the arrangement of the handle assembly, the situation that an existing expansion bolt needs to be rotated with the help of an auxiliary tool is effectively avoided, and the installation efficiency of the expansion bolt is improved.

Description

Technical Field

[0001] This application relates to the field of bolts, and more particularly to an elbow expansion bolt. Background Technology

[0002] Expansion bolts are special threaded fasteners used to fix pipe supports / hangers / brackets or equipment to walls, floors, or columns. Carbon steel bolts are available in more than 10 grades, including 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, and 12.9.

[0003] Traditional expansion bolts require a wrench to tighten during installation. However, wrenches are inconvenient to use in practice, especially in confined spaces, which directly affects the installation of expansion bolts. Utility Model Content

[0004] To address the problem of inconvenient installation of existing expansion bolts, this application provides an elbow expansion bolt.

[0005] The elbow expansion bolt provided in this application adopts the following technical solution:

[0006] An expansion bolt for elbows includes a sleeve assembly and a screw assembly installed in the sleeve assembly. The screw assembly includes a connecting rod with an external thread on its outer wall. One end of the connecting rod is provided with a handle assembly. The sleeve assembly includes a sleeve with multiple equally spaced openings on its outer wall. One end of the connecting rod is screwed with a threaded sleeve, which has a tapered structure.

[0007] By adopting the above technical solution, an expansion bolt is formed by combining the sleeve assembly and the screw assembly, and an L-shaped connecting rod is formed by the handle assembly and the connecting rod, which facilitates the disassembly of the expansion bolt. The threaded sleeve on the connecting rod is convenient to be fixed in the building with the sleeve.

[0008] Preferably, one end of the connecting rod is provided with a rib groove, and the inner walls on both sides of the rib groove are provided with limit grooves.

[0009] By adopting the above technical solution, and by opening a groove and a limiting groove at one end of the connecting rod, the installation of the auxiliary handle assembly is facilitated.

[0010] Preferably, the handle assembly includes a handle, and a prism is fixedly connected to one side of the outer wall of the handle, the specifications of the prism and the specifications of the groove being matched.

[0011] By adopting the above technical solution, and by setting a prism on the handle, the prism can be directly inserted into the groove during handle installation, thus making it convenient to install the handle on the connecting rod.

[0012] Preferably, the prism has an internal mounting cavity, and both inner walls of the mounting cavity have circular openings. The inner walls of the two circular openings are slidably connected to limit pins, and the specifications of the limit pins match the specifications of the limit grooves.

[0013] By adopting the above technical solution, the prism can be slidably installed by opening the mounting cavity in the prism. The prism extends out and is inserted into the locating groove, which facilitates fixing the prism in the locating groove and makes it easier to install the handle on the connecting rod.

[0014] Preferably, the inner walls on both sides of the mounting cavity are rotatably connected to the same screw, and the outer wall of the screw is screwed with a trapezoidal block, the outer wall of the trapezoidal block having two symmetrically arranged sliding grooves.

[0015] By adopting the above technical solution, the trapezoidal block can be moved directly when the screw in the mounting cavity rotates.

[0016] Preferably, the inner walls of both grooves are slidably connected with wedge plates, and the two wedge plates are respectively fixedly connected to two limiting pins.

[0017] By adopting the above technical solution, the trapezoidal block is moved by the rotation of the screw. When the trapezoidal block moves, it works with the wedge plate to directly drive the two limit pins to move towards or away from each other, thereby facilitating the assembly and disassembly of the auxiliary prism.

[0018] Preferably, a worm gear is rotatably connected to the inner wall of the handle, and the worm gear drive shaft is connected to the screw. A worm is rotatably connected to the inner wall of the handle, and the worm and the worm gear mesh with each other. A groove is formed on one side of the outer wall of the handle, and a rotating part is rotatably connected to the inner wall of the groove. One end of the drive shaft of the rotating part is fixedly connected to the worm.

[0019] By adopting the above technical solution, the rotation of the rotating part on the handle directly drives the worm gear to rotate, the rotation of the worm gear directly drives the worm wheel to rotate, and the rotation of the worm wheel directly drives the screw to rotate, thus facilitating the adjustment of the position of the limit pin in conjunction with the trapezoidal block.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. This application improves the installation efficiency of expansion bolts by providing a handle assembly on the connecting rod, which facilitates the rotation of the auxiliary screw assembly and effectively avoids the need for auxiliary tools to rotate the existing expansion bolts;

[0022] 2. This application provides a detachable handle assembly on the connecting rod. The detachable handle assembly can be installed when needed and removed when not needed, thereby facilitating the protection of the expansion bolts and preventing them from being arbitrarily disassembled. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an elbow expansion bolt according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram illustrating the three-dimensional unfolding structure, which is the main feature of the embodiments of this application.

[0025] Figure 3 This is a schematic diagram illustrating the main structure of the screw assembly in the embodiments of this application;

[0026] Figure 4 This is a schematic diagram illustrating the main structure of the handle assembly in the embodiments of this application;

[0027] Figure 5 This is a schematic diagram illustrating a partial cross-sectional view of the handle, which is a key feature of this application.

[0028] Reference numerals: 1. Sleeve assembly; 2. Screw assembly; 3. Sleeve; 4. Opening; 5. Threaded sleeve; 6. Connecting rod; 7. External thread; 8. Handle assembly; 10. Rib groove; 11. Limiting groove; 12. Handle; 13. Rotating part; 14. Prism; 15. Limiting pin; 16. Screw; 17. Wedge plate; 18. Trapezoidal block; 19. Worm gear; 20. Worm. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0030] This application discloses an elbow expansion bolt.

[0031] Reference Figure 1-3 An expansion bolt with an elbow includes a sleeve assembly 1 and a screw assembly 2 installed in the sleeve assembly 1. The fit between the sleeve assembly 1 and the screw assembly 2 forms an expansion bolt with an elbow. The expansion bolt with an elbow facilitates quick installation.

[0032] Reference Figure 2-3 The screw assembly 2 includes a connecting rod 6, and the outer wall of the connecting rod 6 is provided with an external thread 7. One end of the connecting rod 6 is provided with a handle assembly 8. One end of the connecting rod 6 is provided with a rib groove 10, and the inner walls on both sides of the rib groove 10 are provided with limit grooves 11. The rib groove 10 and the limit groove 11 are provided at one end of the connecting rod 6, thereby facilitating the quick installation of the auxiliary handle assembly 8.

[0033] Reference Figure 1-2The sleeve assembly 1 includes a sleeve 3, and the outer wall of the sleeve 3 has multiple equally spaced openings 4. The multiple openings 4 divide one end of the sleeve 4 into multiple areas. One end of the connecting rod 6 is screwed with a threaded sleeve 5 through an external thread 7. The threaded sleeve 5 has a conical structure. The connecting rod 6 rotates in conjunction with the threaded sleeve 5 to facilitate the unfolding of one end of the sleeve 3, thereby facilitating the fixing of the expansion bolt in the building. The expansion bolt is formed by the combination of the sleeve assembly 1 and the screw assembly 2. The handle assembly 8 and the connecting rod 6 form an L-shaped connecting rod 6, which facilitates the disassembly of the expansion bolt. The threaded sleeve 5 on the connecting rod 6 facilitates the fixing of the sleeve 3 in the building. One end of the connecting rod 6 has a rib groove 10 and a limiting groove 11, which facilitates the installation of the handle assembly 8.

[0034] Reference Figure 3-5 The handle assembly 8 includes a handle 12, and a prism 14 is fixedly connected to one outer wall of the handle 12. The specifications of the prism 14 match the specifications of the groove 10. The handle 12 is designed to facilitate manual rotation of the connecting rod 6, thereby facilitating the installation or removal of the expansion bolts and improving the installation efficiency of the expansion bolts. The prism 14 has an installation cavity inside, and both inner walls of the installation cavity have round openings. The inner walls of the two round openings are slidably connected to limit pins 15. The specifications of the limit pins 15 match the specifications of the limit groove 11. The two inner walls of the installation cavity are rotatably connected to the same screw 16. A trapezoidal block 18 is screwed onto the outer wall of the screw 16. Two symmetrically arranged sliding grooves are opened on the outer wall of the trapezoidal block 18. Wedge plates 17 are slidably connected to the inner walls of the two sliding grooves. The two wedge plates 17 are fixedly connected to two limit pins 15 respectively. A worm gear 19 is rotatably connected to the inner wall of the handle 12. The drive shaft of the worm gear 19 is connected to the screw 16. A worm 20 is rotatably connected to the inner wall of the handle 12. The worm 20 and the worm gear 19 mesh with each other. A groove is opened on one side of the outer wall of the handle 12. A rotating part 13 is rotatably connected to the inner wall of the groove. One end of the drive shaft of the rotating part 13 is fixedly connected to the worm 20.

[0035] In use, the rotation of the rotating part 13 on the handle 12 directly drives the worm gear 20 to rotate. When the worm gear 20 rotates, it directly drives the worm wheel 19 to rotate. When the worm wheel 19 rotates, it directly drives the screw 16 to rotate. This facilitates the adjustment of the position of the limit pin 15 with the help of the trapezoidal block 18. The rotation of the screw 16 drives the trapezoidal block 18 to move. When the trapezoidal block 18 moves, it works with the wedge plate 17 to directly drive the two limit pins 15 to move towards or away from each other. This facilitates the disassembly and assembly of the prism 14. The opening of the mounting cavity in the prism 14 facilitates the sliding installation of the limit pin 15. The limit pin 15 extends out and is inserted into the limit groove 11, which facilitates the fixing of the prism 14 in the limit groove 11. This also facilitates the installation of the handle 12 on the connecting rod 6.

[0036] The implementation principle of the elbow expansion bolt in this embodiment is as follows: In use, after the bolt is installed, the connecting rod 6 is rotated directly through the handle assembly 8. When the connecting rod 6 rotates, it directly engages with the sleeve 3 to fix the expansion bolt. After the expansion bolt is installed, the handle assembly 8 needs to be disassembled. When disassembling, the rotating part 13 is rotated directly. When the rotating part 13 rotates, it directly drives the worm gear 20 to rotate. When the worm gear 20 rotates, it directly drives the worm wheel 19 to rotate. When the worm wheel 19 rotates, it directly drives the screw 16 to rotate. When the screw 16 rotates, it directly drives the trapezoidal block 18 to move. When the trapezoidal block 18 moves, it engages with the wedge plate 17 to drive the limit pin 15 to retract or extend. When the limit pin 15 retracts into the installation cavity, the handle 12 can be directly disassembled, thereby preventing the expansion bolt from being disassembled arbitrarily.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elbow expansion bolt, comprising a sleeve assembly (1) and a screw assembly (2) mounted in the sleeve assembly (1), characterized in that: The screw assembly (2) includes a connecting rod (6), and the outer wall of the connecting rod (6) is provided with an external thread (7). One end of the connecting rod (6) is provided with a handle assembly (8). The sleeve assembly (1) includes a sleeve (3), and the outer wall of the sleeve (3) is provided with a plurality of equally spaced openings (4). One end of the connecting rod (6) is screwed with a threaded sleeve (5) through the external thread (7), and the threaded sleeve (5) has a conical structure.

2. The elbow expansion bolt according to claim 1, characterized in that: One end of the connecting rod (6) is provided with a rib groove (10), and the inner walls on both sides of the rib groove (10) are provided with limit grooves (11).

3. The elbow expansion bolt according to claim 2, characterized in that: The handle assembly (8) includes a handle (12), and a prism (14) is fixedly connected to one side of the outer wall of the handle (12), the specifications of the prism (14) and the specifications of the groove (10) are matched.

4. The elbow expansion bolt according to claim 3, characterized in that: The prism (14) has an installation cavity inside, and the inner walls on both sides of the installation cavity have round openings. The inner walls of the two round openings are slidably connected to limit pins (15), and the specifications of the limit pins (15) match the specifications of the limit grooves (11).

5. The elbow expansion bolt according to claim 4, characterized in that: The same screw (16) is rotatably connected to the inner walls of both sides of the mounting cavity, and a trapezoidal block (18) is screwed onto the outer wall of the screw (16). Two symmetrically arranged sliding grooves are opened on the outer wall of the trapezoidal block (18).

6. The elbow expansion bolt according to claim 5, characterized in that: Both of the inner walls of the two grooves are slidably connected with wedge plates (17), and the two wedge plates (17) are respectively fixedly connected to two limit pins (15).

7. The elbow expansion bolt according to claim 6, characterized in that: The inner wall of the handle (12) is rotatably connected to a worm gear (19), and the drive shaft of the worm gear (19) is connected to the screw (16). The inner wall of the handle (12) is rotatably connected to a worm (20), and the worm (20) and the worm gear (19) mesh with each other. A groove is opened on one side of the outer wall of the handle (12), and a rotating part (13) is rotatably connected to the inner wall of the groove. One end of the drive shaft of the rotating part (13) is fixedly connected to the worm (20).

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