Taking-out device for large-diameter fractured bolt

Abstract

The utility model provides a device for taking out a large-diameter broken bolt. The device comprises a stress part and a handle part, the stress part comprises a first T-shaped rod and a second T-shaped rod. A T-shaped groove is formed in the end face of the handle part; the T-shaped grooves are matched with the first T-shaped rod and the second T-shaped rod in shape; and the upper parts of the first T-shaped rod and the second T-shaped rod slide into or out of the handle part from the T-shaped groove. The taking-out device is used in cooperation with two open holes in the upper end face of the fractured bolt, and the lower ends of the vertical portions of the first T-shaped rod and the second T-shaped rod are clamped into the two open holes in the fractured face of the fractured bolt respectively. The broken bolt can be smoothly taken out under the condition that an original screw hole is not damaged, and the bolt taking device is simple in structure, convenient to use and high in working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of fastener construction, in particular to a device for removing a large-diameter broken bolt. Background Art

[0002] As the most common connecting and fastening parts in the production and use of marine engines and components, large-diameter bolts are prone to break under the conditions of harsh use environment, vibration, impact and alternating loads. At this time, it is necessary to remove the broken bolt without damaging the equipment.

[0003] The common methods for removing broken bolts are as follows: 1. Destroy the bolt with a drill bit, re-drill a hole and replace it with a bolt of a larger specification. 2. Use a broken tap extractor to drill a hole in the cross-section of the broken bolt, then tap the thread and take it out. The above methods are difficult to use when dealing with large-diameter bolts in marine engines.

[0004] Therefore, it is a technical problem to be solved to develop a device for removing large-diameter broken bolts that is convenient to use and does not damage the original screw hole. Summary of the Utility Model

[0005] Due to the above defects in the prior art, the utility model provides a device for removing a large-diameter broken bolt, which can smoothly remove the broken bolt without damaging the original screw hole, has a simple structure, is convenient to use, and has high working efficiency.

[0006] To achieve the above object, the utility model provides a device for removing a large-diameter broken bolt, which is characterized in that:

[0007] It includes a stress part and a handle part;

[0008] The stress part includes a first T-shaped rod and a second T-shaped rod; the lower ends of the vertical parts of the first T-shaped rod and the second T-shaped rod are respectively clamped into two openings on the fracture surface of the broken bolt;

[0009] A T-shaped groove is opened on the end face of the handle part; the shape of the T-shaped groove matches that of the first T-shaped rod and the second T-shaped rod; the upper parts of the first T-shaped rod and the second T-shaped rod slide into or out of the handle part from the T-shaped groove.

[0010] The removal device is used in cooperation with two openings on the upper end face of the broken bolt. First, slide the upper parts of the first T-shaped rod and the second T-shaped rod into the handle part from the T-shaped groove, slide and adjust the distance between the lower vertical parts of the first T-shaped rod and the second T-shaped rod to be the same as the distance between the two openings on the upper end face of the broken bolt, and then insert the lower vertical parts of the first T-shaped rod and the second T-shaped rod into the two openings respectively. Gently tap the handle part to loosen the broken bolt, and then hold both ends of the handle part with both hands and apply force intermittently to screw out the broken stud from the threaded hole.

[0011] Further, the lower ends of the vertical portions of the first T-shaped rod and the second T-shaped rod are inserted into the broken bolt to a depth exceeding half of the length of the broken bolt.

[0012] Further, the horizontal portions of the first T-shaped rod and the second T-shaped rod are flat plates, and the vertical portions are cylindrical. The width of the horizontal portion is greater than the diameter of the vertical portion.

[0013] Further, the horizontal connection line of the vertical portions of the first T-shaped rod and the second T-shaped rod passes through the center of the end face of the broken bolt.

[0014] Further, the distance between the vertical portions of the first T-shaped rod and the second T-shaped rod is 1 / 2 of the diameter of the broken bolt, and the diameters of the vertical portions are both 1 / 6 of the diameter of the broken bolt.

[0015] Further, the materials of the stress-bearing portion and the handle portion are both T8 tool steel.

[0016] Compared with the prior art, the present utility model has the following advantages or beneficial effects:

[0017] The device of the present utility model can remove the broken bolt column inside without damaging the threads of the original components. It has a simple structure, a simple usage method, low cost, and can be used for bolts above M20 by matching with stress-bearing portions of different specifications, and has a very wide application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, the present utility model and its features, shape, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on showing the gist of the present utility model.

[0019] Figure 1 It is the front view of the first T-shaped rod or the second T-shaped rod in an embodiment of the present utility model;

[0020] Figure 2 It is the bottom view of the first T-shaped rod or the second T-shaped rod in an embodiment of the present utility model;

[0021] Figure 3 It is the front view of the handle portion in an embodiment of the present utility model;

[0022] Figure 4 It is the side view of the handle portion in an embodiment of the present utility model;

[0023] Figure 5 It is the structural schematic diagram of the extraction device in an embodiment of the present utility model;

[0024] Figure 6Schematic structural diagram of the opening of a broken bolt in an embodiment of the present utility model;

[0025] Figure 7 Schematic structural diagram of the use of the extraction device in an embodiment of the present utility model;

[0026] Wherein, 11 is the first T-shaped rod; 12 is the second T-shaped rod; 2 is the handle part; 21 is the T-shaped groove; 3 is the broken bolt; 31 is the opening; 111 is the vertical part; 112 is the horizontal part. Detailed implementation manners

[0027] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. It should be understood that all these described exemplary embodiments are only partial embodiments and examples of the present utility model, rather than all. On the contrary, these exemplary embodiments are provided so that those skilled in the art can understand the present disclosure more thoroughly and can convey the technical content of the present disclosure more completely to those skilled in the art.

[0028] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. The orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present utility model.

[0029] Embodiment

[0030] This embodiment provides a device for extracting a large-diameter broken bolt, including a force-bearing part and a handle part;

[0031] The force-bearing part includes a first T-shaped rod 11 and a second T-shaped rod 12; see Figure 1 and Figure 2 , the horizontal parts 112 of the first T-shaped rod 11 and the second T-shaped rod 12 are preferably flat plate-shaped, the vertical parts 111 are preferably cylindrical, and the width of the horizontal part 112 is greater than the diameter of the vertical part 111.

[0032] See Figure 3 and Figure 4 , a T-shaped groove 21 is opened on the end face of the handle part 2; the shape of the T-shaped groove 21 matches that of the first T-shaped rod 11 and the second T-shaped rod 12. See Figure 5 , the upper parts of the first T-shaped rod 11 and the second T-shaped rod 12 slide into or out of the handle part 2 from the T-shaped groove 21.

[0033] See Figure 6, two openings 31 are provided on the upper end surface of the broken bolt 3. The extraction device is used in cooperation with the two openings 31 of the broken bolt 3. The lower ends of the vertical parts 111 of the first T-shaped rod 11 and the second T-shaped rod 12 are respectively clamped into the two openings 31 on the fracture surface of the broken bolt 3.

[0034] See Figure 7 , when the device is in use, first slide the upper parts of the first T-shaped rod 11 and the second T-shaped rod 12 into the handle part 2 from the T-shaped groove 21, slide and adjust the distance between the lower vertical parts 111 of the first T-shaped rod 11 and the second T-shaped rod 12 to be the same as the distance between the two openings 31 on the upper end surface of the broken bolt 3, and then insert the lower vertical parts of the first T-shaped rod 11 and the second T-shaped rod 12 into the two openings 31 respectively. Gently tap the handle part 2 to loosen the broken bolt 3, and then hold both ends of the handle part 2 with both hands and apply force intermittently to screw out the broken stud 3 from the threaded hole.

[0035] A preferred example is provided below to facilitate those skilled in the art to understand the technical solutions and technical effects of the present invention.

[0036] After the M20 bolt is broken, the part that is screwed into the threaded hole of the part remains in the part and cannot be taken out. The extraction structure for larger diameter broken bolts can refer to the extraction structure of M20 bolts. See Figure 6 , first select a drill bit with a suitable diameter on the upper end surface of the broken bolt 3, drill two openings 31 on the upper end surface of the broken bolt 3. The diameter of the opening 31 is about 1 / 6 of the diameter of the broken bolt. The distance between the two holes is about 1 / 2 of the diameter of the broken bolt 3. The connection line of the two holes passes through the center of the bolt end face, and the depth reaches more than half of the length of the broken bolt 3. Preferably, both the force-bearing part and the handle part of the extraction device are made of common T8 tool steel. The cylindrical diameter of the vertical part 111 of the first T-shaped rod 11 and the second T-shaped rod 12 is 0.5-1 mm less than the drilling diameter of the broken bolt. See Figure 7 , first slide the upper parts of the first T-shaped rod 11 and the second T-shaped rod 12 into the handle part 2 from the T-shaped groove 21, slide and adjust the distance between the lower vertical parts 111 of the first T-shaped rod 11 and the second T-shaped rod 12 to be the same as the distance between the two openings 31 on the upper end surface of the broken bolt 3, and then clamp the lower ends of the vertical parts 111 of the first T-shaped rod 11 and the second T-shaped rod 12 into the openings 31 of the broken bolt, and the depth reaches more than half of the length of the broken bolt, so that it is not easy to break out of the opening 31 when the force-bearing part moves. The horizontal connection line of the vertical parts of the first T-shaped rod 11 and the second T-shaped rod 12 passes through the center of the end face of the broken bolt 3, so that the rotation center of the force-bearing part is as close as possible to the center of the end face of the broken bolt 3. Gently tap the handle part 2 to loosen the broken bolt 3 and then rotate the handle part 2 forcefully. The force-bearing part connected to the handle part rotates to screw out the broken bolt 3.

[0037] In summary, the present application provides a device for removing a large-diameter fractured bolt, including a force-receiving part and a handle part; the force-receiving part includes a first T-shaped rod and a second T-shaped rod. A T-shaped groove is formed on the end face of the handle part; the shape of the T-shaped groove matches that of the first T-shaped rod and the second T-shaped rod; the upper parts of the first T-shaped rod and the second T-shaped rod slide into or out of the handle part from the T-shaped groove. The removing device is used in cooperation with two openings on the upper end face of the fractured bolt, and the lower ends of the vertical parts of the first T-shaped rod and the second T-shaped rod are respectively clamped into the two openings on the fracture surface of the fractured bolt; the utility model can smoothly remove the broken bolt without damaging the original screw hole, has a simple structure, is convenient to use, and has high working efficiency.

[0038] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A device for removing broken bolts with large diameter, characterized in that: It includes a force-bearing portion and a handle portion; The force-bearing part comprises a first T-shaped rod (11) and a second T-shaped rod (12); the lower ends of the vertical parts (111) of the first T-shaped rod (11) and the second T-shaped rod (12) are respectively inserted into two openings (31) on the fracture surface of the broken bolt (3); The end surface of the handle portion (2) is provided with a T-shaped groove (21); the shape of the T-shaped groove (21) matches the first T-shaped rod (11) and the second T-shaped rod (12); the upper parts of the first T-shaped rod (11) and the second T-shaped rod (12) slide into or out of the handle portion (2) through the T-shaped groove (21).

2. The device for removing a broken bolt with a large diameter according to claim 1, characterized in that: The depth at which the lower ends of the vertical parts of the first T-shaped rod (11) and the second T-shaped rod (12) are inserted into the broken bolt (3) reaches more than half the length of the broken bolt.

3. A device for removing a broken bolt with a large diameter according to claim 1 or 2, characterized in that: The horizontal parts (112) of the first T-shaped rod (11) and the second T-shaped rod (12) are in the shape of a flat plate, and the vertical parts (111) are in the shape of a cylinder. The width of the horizontal part (112) is greater than the diameter of the vertical part (111).

4. A device for removing a broken bolt with a large diameter according to claim 1 or 2, characterized in that: A horizontal line connecting the vertical parts of the first T-shaped rod (11) and the second T-shaped rod (12) passes through the center of the end surface of the broken bolt (3).

5. The device for removing a broken bolt with a large diameter according to claim 4, characterized in that: The distance between the vertical parts of the first T-shaped rod (11) and the second T-shaped rod (12) is 1 / 2 of the diameter of the broken bolt, and the diameters of the vertical parts are both 1 / 6 of the diameter of the broken bolt.

6. A device for removing a broken bolt with a large diameter according to claim 1 or 2, characterized in that: The materials of the force-bearing part and the handle part are both T8 tool steel.

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