Welding type stud with cylindrical head

Abstract

The utility model belongs to the technical field of expansion studs, and particularly relates to a welding type cylindrical head stud which comprises a screw, a nut is rotationally connected to the circumferential face of the screw, a gasket is rotationally connected to the circumferential face of the screw, and an expansion device is arranged on the outer surface of the screw. The expansion device comprises a round pipe, the round pipe is arranged on the outer circumferential face of the screw, a sliding groove is formed in the inner wall of the round pipe, and the inner wall of the sliding groove is fixedly connected with one end of a spring. Through the arrangement of the expansion device, the connecting plate is opened to complete expansion of the bolt, the stud is applied to wider fields, the bolt can be conveniently fixed to a wall through the application of the conical column, meanwhile, the use performance of the stud is improved, subsequent use of the stud is facilitated, and the stud is convenient to use. The problems that a connecting plate cannot be opened to complete expansion of a screw, so that the screw cannot be fixed in an internal hole of a wall, and the screw is prone to loosening are solved.

Description

Technical Field

[0001] This utility model belongs to the field of expansion stud technology, specifically relating to a welded cylindrical head stud. Background Technology

[0002] Cylindrical head studs are short for cylindrical head studs used in arc stud welding. They are a type of high-strength, rigid fastener, mainly used in large public buildings and high-rise buildings to provide good bonding between steel components. They have been applied in industrial plant construction, highways, railways, bridges, towers, automobiles, energy, transportation facilities, airports, stations, power plants, pipeline supports, and lifting machinery.

[0003] Chinese patent publication number CN 113681131 A discloses a cylindrical head welding stud, including a first screw, a second screw, and a cylindrical head. The first screw has a groove at the center of its rear end, and the second screw has a protrusion at its front end that mates with the groove. The protrusion slides within the groove. The cylindrical head is fixed to the rear end of the second screw. The first screw has an arc-starting point at its front end. A stop block is provided inside the groove. The protrusion has a mounting groove on its side. A locking block is provided within the mounting groove. The locking block is rotatably connected to the mounting groove via a connecting rod. A return spring is connected between the connecting rod and the locking block. The locking block can engage with the protrusion.

[0004] However, the current cylindrical head weld stud has the following problem: it cannot allow the connecting plate to open to complete the expansion of the screw, which makes it impossible for the screw to be fixed in the hole inside the wall, resulting in easy loosening. Therefore, we propose a welded cylindrical head stud. Utility Model Content

[0005] The purpose of this invention is to provide a welded cylindrical head stud that can solve the problem in related technologies where the connecting plate cannot be opened to allow the screw to expand, resulting in the screw being unable to be fixed in the hole inside the wall and causing it to loosen easily.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A weldable cylindrical head stud includes a screw, a nut rotatably connected to the circumferential surface of the screw, a washer rotatably connected to the circumferential surface of the screw, and an expansion device provided on the outer surface of the screw. The expansion device includes a circular tube disposed on the outer circumferential surface of the screw. A groove is formed on the inner wall of the circular tube. One end of a spring is fixedly connected to the inner wall of the groove. A slider is fixedly connected to the end of the spring away from the inner wall of the groove. A connecting plate is fixedly connected to the side of the slider.

[0008] Preferably, a long plate is fixedly connected to the side of the connecting plate, and a tapered column is provided on the circumferential surface of the screw. This design makes it easier for the tapered column to fit into the round tube.

[0009] Preferably, the number of the slide grooves is three, and they are arranged circumferentially on the inner wall of the circular tube. The slide grooves are located on the movement trajectory of the slider. This design is beneficial for the slider to slide back and forth on the inner wall of the slide groove.

[0010] Preferably, an auxiliary device is provided on the circumferential surface of the circular tube. The auxiliary device includes a long rod disposed inside the circular tube. A push plate is fixedly connected to the bottom of the long rod, and a telescopic rod is fixedly connected to the side of the push plate. One end of a force-bearing spring is fixedly connected to the outer surface of the push plate, and the end of the force-bearing spring away from the outer surface of the push plate is fixedly connected to the inner wall of the circular tube. A rectangular groove is formed on the inner wall of the circular tube, and a rectangular block is slidably connected to the inner wall of the rectangular groove. A rectangular plate is fixedly connected to the side of the rectangular block, and an open groove is formed on the outer circumferential surface of the circular tube. This design facilitates the telescopic tube to expand and contract under force.

[0011] Preferably, there are two push plates, which are symmetrical to each other along the vertical central axis of the screw. The rectangular groove is located on the movement trajectory of the rectangular block, and the open slot is on the movement trajectory of the rectangular plate. This design is conducive to the push plates moving evenly on both sides of the screw.

[0012] Preferably, the long rod is L-shaped, one end of the long rod is arc-shaped, and there are two telescopic rods that are symmetrical about each other along the vertical central axis of the push plate. This design helps to distribute the force more evenly on the arc surface of the long rod.

[0013] Preferably, the connecting plate is L-shaped, and the number of long plates is three, which are arranged in a circular array on the outer surface of the circular tube. One end of each long plate is arc-shaped. This design makes it easier for the long plates to move back and forth.

[0014] The technical effects achieved by this utility model are as follows:

[0015] 1. This utility model, through the setting of the expansion device, allows the connecting plate to open and complete the expansion of the screw, enabling the stud to be used in a wider range of fields. The use of the tapered column facilitates the fixing of the bolt to the wall, while also increasing the performance of the stud and facilitating its subsequent use.

[0016] 2. This utility model enhances the fixing stability of the bolt by setting up an auxiliary device. When the bolt needs to be pulled out later, the tapered column can be removed and the force spring can also be reset. The use of the auxiliary device makes the bolt more versatile in later applications and facilitates development. At the same time, it is different from the use of ordinary bolts and is more practical in related fields. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the circular tube part of this utility model;

[0019] Figure 3 This is a utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0020] Figure 4 This is a three-dimensional sectional view of the structure at the push plate of this utility model;

[0021] Figure 5 This is a utility model Figure 4 A three-dimensional magnified schematic diagram of the structure at point B.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Screw; 2. Nut; 3. Washer; 4. Expansion device; 41. Round tube; 42. Slide groove; 43. Spring; 44. Slider; 45. Connecting plate; 46. Long plate; 47. Conical column; 5. Auxiliary device; 51. Long rod; 52. Push plate; 53. Telescopic rod; 54. Force spring; 55. Rectangular groove; 56. Rectangular block; 57. Rectangular plate; 58. Open slot. Detailed Implementation

[0024] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0025] like Figure 1-3 As shown, a welded cylindrical head stud includes a screw 1, a nut 2 rotatably connected to the circumferential surface of the screw 1, a washer 3 rotatably connected to the circumferential surface of the screw 1, and an expansion device 4 provided on the outer surface of the screw 1. The expansion device 4 includes a cylindrical tube 41, which is provided on the outer circumferential surface of the screw 1. A groove 42 is formed on the inner wall of the cylindrical tube 41. One end of a spring 43 is fixedly connected to the inner wall of the groove 42. A slider 44 is fixedly connected to the end of the spring 43 away from the inner wall of the groove 42. A connecting plate 45 is fixedly connected to the side of the slider 44. This design facilitates the movement of the slider 44 and the connecting plate 45 together.

[0026] A long plate 46 is fixedly connected to the side of the connecting plate 45, and a tapered post 47 is provided on the circumferential surface of the screw 1. This design makes it easier for the tapered post 47 to be inserted into the round tube 41.

[0027] There are three slide grooves 42, which are arranged circumferentially on the inner wall of the circular tube 41. The slide grooves 42 are located on the movement trajectory of the slider 44. This design is conducive to the slider 44 sliding back and forth on the inner wall of the slide groove 42.

[0028] According to the above structure, when the worker first installs the bolt to the designated position, the screw 1 needs to be aligned with the hole prepared by the worker and inserted into the hole. Then, force is applied to the screw 1 to rotate, forcing the tapered column 47 to move towards the inner wall of the round tube 41. This forces the long plate 46 to slide on the inner wall of the groove 42 via the spring 43. At the same time, the thickness of the long plate 46 is thinner than that of the round tube 41, which facilitates the tapered column 47 to compress significantly, causing the connecting plate 45 to open and complete the expansion of the screw 1. This allows the stud to be used in a wider range of fields. The use of the tapered column 47 facilitates the fixing of the bolt to the wall and also increases the performance of the stud, making it easier to use the stud in the future.

[0029] like Figure 4-5 As shown, an auxiliary device 5 is provided on the circumferential surface of the circular tube 41. The auxiliary device 5 includes a long rod 51, which is located inside the circular tube 41. A push plate 52 is fixedly connected to the bottom of the long rod 51, and a telescopic rod 53 is fixedly connected to the side of the push plate 52. One end of a force-bearing spring 54 is fixedly connected to the outer surface of the push plate 52. The end of the force-bearing spring 54 away from the outer surface of the push plate 52 is fixedly connected to the inner wall of the circular tube 41. A rectangular groove 55 is provided on the inner wall of the circular tube 41. A rectangular block 56 is slidably connected to the inner wall of the rectangular groove 55. A rectangular plate 57 is fixedly connected to the side of the rectangular block 56. An open groove 58 is provided on the outer circumferential surface of the circular tube 41. This design is beneficial for the telescopic rod 53 to extend and retract under force.

[0030] There are two push plates 52, which are symmetrical to each other along the vertical central axis of screw 1. The rectangular groove 55 is located on the movement trajectory of the rectangular block 56, and the open groove 58 is on the movement trajectory of the rectangular plate 57. This design is conducive to the push plates 52 moving evenly on both sides of screw 1.

[0031] The long rod 51 is L-shaped, with one end of the long rod 51 being an arc surface. There are two telescopic rods 53, which are symmetrical to each other along the vertical central axis of the push plate 52. This design helps the arc surface of the long rod 51 to be subjected to more uniform force.

[0032] The connecting plate 45 is L-shaped, and there are three long plates 46 arranged in a circumferential array on the outer surface of the circular tube 41. One end of the long plate 46 is arc-shaped, which makes it easier for the long plate 46 to move back and forth.

[0033] According to the above structure, when the conical column 47 is inserted into the round tube 41, it will touch the long rod 51 on the inner wall of the round tube 41. The long rod 51 is pressed by the push plate 52, which forces the push plate 52 to drive the rectangular block 56 to slide on the inner wall of the rectangular groove 55 through the telescopic rod 53. This forces the rectangular block 56 to move in the rectangular groove 55 and push the rectangular plate 57 out of the opening groove 58, thereby opening up the hole in the wall and increasing the fixing of the bolt. When the bolt needs to be pulled out later, the conical column 47 can be removed and the force spring 54 can also be reset. The use of the auxiliary device 5 makes the later application of the bolt more comprehensive and convenient for development. At the same time, it is different from the use of ordinary bolts and is more practical in related fields.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A weld-on cylindrical stud, characterized by: Includes a screw (1), a nut (2) is rotatably connected to the circumferential surface of the screw (1), a washer (3) is rotatably connected to the circumferential surface of the screw (1), and an expansion device (4) is provided on the outer surface of the screw (1). The expansion device (4) includes a round tube (41) which is disposed on the outer circumferential surface of the screw (1). A groove (42) is provided on the inner wall of the round tube (41). One end of a spring (43) is fixedly connected to the inner wall of the groove (42). A slider (44) is fixedly connected to the end of the spring (43) away from the inner wall of the groove (42). A connecting plate (45) is fixedly connected to the side of the slider (44).

2. A weld type cylinder stud as defined in claim 1 wherein: The side of the connecting plate (45) is fixedly connected to a long plate (46), and the circumferential surface of the screw (1) is provided with a tapered column (47).

3. A weld type cylinder stud as defined in claim 1 wherein: The number of the slide grooves (42) is three, and they are arranged in a circumferential array on the inner wall of the circular tube (41). The slide grooves (42) are located on the movement trajectory of the slider (44).

4. A weld type cylinder stud as defined in claim 1 wherein: An auxiliary device (5) is provided on the circumferential surface of the circular tube (41). The auxiliary device (5) includes a long rod (51). The long rod (51) is located inside the circular tube (41). A push plate (52) is fixedly connected to the bottom of the long rod (51). A telescopic rod (53) is fixedly connected to the side of the push plate (52). One end of a force spring (54) is fixedly connected to the outer surface of the push plate (52). The end of the force spring (54) away from the outer surface of the push plate (52) is fixedly connected to the inner wall of the circular tube (41). A rectangular groove (55) is opened on the inner wall of the circular tube (41). A rectangular block (56) is slidably connected to the inner wall of the rectangular groove (55). A rectangular plate (57) is fixedly connected to the side of the rectangular block (56). An open groove (58) is opened on the outer circumferential surface of the circular tube (41).

5. A weld type cylinder stud as defined in claim 4 wherein: The number of push plates (52) is set to two, and they are symmetrical to each other along the vertical central axis of the screw (1). The rectangular groove (55) is located on the movement trajectory of the rectangular block (56), and the opening groove (58) is on the movement trajectory of the rectangular plate (57).

6. A weld type cylinder stud as defined in claim 4 wherein: The long rod (51) is L-shaped, one end of the long rod (51) is arc-shaped, and there are two telescopic rods (53) that are symmetrical to each other along the vertical central axis of the push plate (52).

7. A weld type cylinder stud as defined in claim 2 wherein: The connecting plate (45) is L-shaped, and there are three long plates (46) arranged in a circumferential array on the outer surface of the circular tube (41). One end of the long plate (46) is arc-shaped.

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