Ejector pin for one-way bolt

Abstract

The utility model provides an ejector pin for a one-way bolt. The ejector pin comprises a straight rod section (1), a strip-shaped block (2) and a bent section (3), the strip-shaped block (2) is horizontally arranged; the outer diameter of the straight rod section (1) is not smaller than the size of the strip-shaped block (2) in the width direction and is smaller than the size of the strip-shaped block (2) in the length direction; the lower end of the straight rod section (1) is vertically and fixedly connected to the center of the upper end of the strip-shaped block (2); and the bent section (3) is fixedly connected to the upper end of the straight rod section (1). The ejector pin is simple in structure, low in manufacturing cost, convenient and fast to operate, and capable of achieving fast installation operation of the one-way bolt and fast recovery operation of the one-way bolt.

Description

Technical Field

[0001] This utility model belongs to the field of building structure renovation and reinforcement technology, specifically relating to a pin for one-way bolts. Background Technology

[0002] In the process of joining two objects, welding, riveting, or bolting are commonly used. Among these, bolting is the most widely used method due to its simplicity, ease of joining and separating, and the absence of thermal deformation. This bolting method typically involves inserting a bolt into a threaded hole in the joined parts and securing it with a nut on the back. However, in existing technologies, some joined parts have enclosed spaces on their backs, inaccessible by hand or tools, making conventional bolting methods impossible. This has led to the development of one-way bolts, especially those with a crossarm that can rotate relative to the screw. These bolts often require a dedicated ejector pin for rotation, but current technology lacks such a pin, making the connection process inconvenient and reducing efficiency. Therefore, there is an urgent need for a ejector pin for one-way bolts. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention provides a jacking pin for one-way bolts. The jacking pin has a simple structure, low manufacturing cost, and convenient operation. It can realize the quick installation of one-way bolts and the quick recycling of one-way bolts.

[0004] To achieve the above objectives, this utility model provides a ejector pin for a one-way bolt, the ejector pin comprising a straight rod section, a strip block, and a bent section;

[0005] The strip blocks are set horizontally;

[0006] The outer diameter of the straight rod segment is not less than the width dimension of the strip block and is less than the length dimension of the strip block; the lower end of the straight rod segment is vertically fixed to the center of the upper end of the strip block.

[0007] The curved section is fixedly connected to the upper end of the straight section.

[0008] As a preferred embodiment, the curved segment is in the form of a notched annular ring.

[0009] As a preferred embodiment, the curved segment is in the shape of a square ring with a notch.

[0010] As a preferred embodiment, the two ends of the strip block in the length direction are circular arc structures.

[0011] As a preferred embodiment, the straight rod segment, the strip block, and the curved segment are integrally formed.

[0012] In this invention, a strip block is vertically connected to the lower end of the straight rod section. This allows the strip block to be inserted into the axial connecting hole of the one-way bolt thread section using the straight rod section, and then into the transverse through hole of the one-way bolt, interacting with the stop block. This leverages the larger area of ​​the strip block compared to the end of the straight rod section, enabling convenient and efficient outward movement of the stop block to quickly bring the crossarm to its limit position. Simultaneously, the angle between the strip block and the groove on the stop block can be changed by the straight rod section. When the strip block is parallel to the groove, it can enter the larger groove section through the smaller groove. Further rotation of the strip block's angle allows it to achieve a limit engagement with the larger groove section. This facilitates the movement of the stop block using a pin, enabling the crossarm to be retracted into the transverse through hole of the one-way bolt, achieving rapid retraction. A curved section is fixedly connected to the upper end of the straight rod section, providing a grip for the operator and further facilitating pushing and pulling operations.

[0013] This ejector pin has a simple structure, low manufacturing cost, and convenient operation. It can realize the quick installation of one-way bolts, and at the same time, it can also realize the quick recycling of one-way bolts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the strip block in this utility model;

[0016] Figure 3 This is a schematic diagram of the one-way bolt in this utility model;

[0017] Figure 4 This is a schematic diagram of the crossbeam structure in this utility model;

[0018] Figure 5 This is an assembly diagram of the ejector pin and the one-way screw in this utility model.

[0019] In the diagram: 1. Straight rod section, 2. Strip block, 3. Bending section, 4. One-way bolt, 5. Plain rod section, 6. Threaded section, 7. Screw, 8. Crossbeam, 9. Horizontal through hole, 10. Vertical slide groove, 11. Axial connecting hole, 12. Stop block, 13. Slider, 14. Chamfered surface, 15. Strip groove, 16. Nut, 17. Horizontal limiting block, 18. Ejector pin. Detailed Implementation

[0020] The present invention will be further described below.

[0021] like Figures 1 to 5 As shown, this utility model provides a push pin for a one-way bolt, the push pin 18 including a straight rod section 1, a strip block 2 and a bent section 3;

[0022] The strip block 2 is set horizontally;

[0023] The outer diameter of the straight rod segment 1 is not less than the width dimension of the strip block 2 and is less than the length dimension of the strip block 2; the lower end of the straight rod segment 1 is vertically fixed to the center of the upper end of the strip block 2.

[0024] The curved section 3 is fixedly connected to the upper end of the straight section 1.

[0025] As a preferred embodiment, the curved segment 3 is in the form of a ring with a notch.

[0026] As a preferred embodiment, the curved segment 3 is in the shape of a square ring with a notch.

[0027] As a preferred embodiment, the two ends of the strip block 2 in the length direction are circular arc structures.

[0028] As a preferred embodiment, the straight rod segment 1, the strip block 2, and the curved segment 3 are integrally formed.

[0029] The one-way bolt 4 includes a screw 7 and a crossbeam 8. The lower section of the screw 7 is a smooth section 5, and the upper section is a threaded section 6. The smooth section 5 has a radially extending transverse through hole 9. A transverse limiting block 17 is fixedly connected to one end of the transverse through hole 9 inside the smooth section 5. Two vertical grooves 10 are symmetrically opened on both sides of the longitudinal direction of the transverse through hole 9 on the axial part of the smooth section 5. A nut 16 is fitted on the outside of the end of the threaded section 6, and an axial connecting hole 1 is opened at the axial center of the threaded section 6. 1. The lower end of the axial connecting hole 11 is connected to the top of the transverse through hole 9, and its upper end extends to the upper end of the threaded section 6; the crossbeam 8 includes a stop block 12 and a slider 13. The stop block 12 is rectangular and has a chamfered surface 14 at one corner. The size of the stop block 12 is adapted to the size of the transverse through hole 9 and is set in the transverse through hole 9; two sliders 13 are correspondingly set inside the two vertical sliding grooves 10 and are symmetrically installed in the central area of ​​the two sides in the thickness direction of the stop block 12. A strip groove 15 is formed inside the stop block 12. The cross-section of the strip groove 15 is convex. Specifically, the strip groove 15 is composed of a small groove segment at the top and a large groove segment below the small groove segment; the length direction of the strip groove 15 extends obliquely along the length direction of the stop block 12. Its open end extends to the end face of one end in the height direction of the stop block 12, and its first end in the length direction extends to the chamfered surface 14. Its second end in the length direction extends to the middle section of the stop block 12 and is shallower than the first end.

[0030] Instructions for use: When it is necessary to push the crossarm 8 out of the transverse through hole 9, insert the ejector pin 18 into the transverse through hole 9 through the axial connecting hole 11, and push the chamfered surface 15 to rotate away from the smooth rod section 5 until the chamfered surface 15 rotates out of the transverse through hole 6, so that the crossarm 8 rotates to a state perpendicular to the screw 7, thereby achieving the effect of using the crossarm 8 to limit the end of the screw 7; when it is necessary to retract the crossarm 8, which has been rotated to a state perpendicular to the screw 7, into the transverse through hole 9, first insert the strip block 2 of the ejector pin 18 into the large groove section through the small groove section in a state parallel to the strip groove 15, and then rotate it 90 degrees so that the strip block 2 is aligned with the large groove. When the segment is in a limited engagement state, the ejector pin is pulled upward. At the same time, due to the inclined state of the strip groove 15 and the presence of the transverse limiting block 17, the stop block 12 will be blocked by the transverse limiting block 17 during the pulling process. As a result, the slider 13 rotates in the vertical slide groove 10. The ejector pin 18 is pulled upward again, and the strip block 2 slides towards the chamfered surface 14 in the strip groove 15. When the length direction of the stop block 12 is consistent with the axis direction of the screw 7, the strip block 2 naturally slides out from the open end on the chamfered surface 14. In this state, the ejector pin 18 is pulled upward again, and the ejector pin 18 disengages from the one-way bolt 4.

[0031] In this invention, a strip block is vertically connected to the lower end of the straight rod section. This allows the strip block to be inserted into the axial connecting hole of the one-way bolt thread section using the straight rod section, and then into the transverse through hole of the one-way bolt, interacting with the stop block. This leverages the larger area of ​​the strip block compared to the end of the straight rod section, enabling convenient and efficient outward movement of the stop block to quickly bring the crossarm to its limit position. Simultaneously, the angle between the strip block and the groove on the stop block can be changed by the straight rod section. When the strip block is parallel to the groove, it can enter the larger groove section through the smaller groove. Further rotation of the strip block's angle allows it to achieve a limit engagement with the larger groove section. This facilitates the movement of the stop block using a pin, enabling the crossarm to be retracted into the transverse through hole of the one-way bolt, achieving rapid retraction. A curved section is fixedly connected to the upper end of the straight rod section, providing a grip for the operator and further facilitating pushing and pulling operations.

[0032] This ejector pin has a simple structure, low manufacturing cost, and convenient operation. It can realize the quick installation of one-way bolts, and at the same time, it can also realize the quick recycling of one-way bolts.

Claims

1. A jack for a one-way bolt, characterized in that, The ejector pin (18) includes a straight rod section (1), a strip block (2), and a curved section (3); The strip block (2) is set horizontally; The outer diameter of the straight rod segment (1) is not less than the width dimension of the strip block (2) and is less than the length dimension of the strip block (2); the lower end of the straight rod segment (1) is vertically fixed to the center of the upper end of the strip block (2); The curved section (3) is fixedly connected to the upper end of the straight section (1).

2. A jack for a one-way bolt according to claim 1, characterized in that, The curved section (3) is in the shape of a ring with a notch.

3. A jack for a one-way bolt according to claim 1 or 2, characterized in that, The curved section (3) is a square ring with a notch.

4. A jack for a one-way bolt according to claim 3, characterized in that, The two ends of the strip block (2) in the length direction are circular arc structures.

5. A jack for a one-way bolt according to claim 4, characterized in that, The straight rod section (1), the strip block (2), and the curved section (3) are integrally formed structures.

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