High-strength bolt

Abstract

The high-strength bolt comprises a bolt body, one side of the outer surface of the bolt body is connected with a nut through a thread structure, and the lower end face of the nut is provided with a circle of through holes penetrating through the nut. A wooden fixing head is fixedly arranged on the lower end face of the bolt, a cylindrical metal shell is arranged on the outer side of the wooden fixing head, a connecting groove is formed in the middle of the upper end face of the cylindrical metal shell, and the outer surface of the wooden fixing head is sleeved with the cylindrical metal shell through the connecting groove. The outer side of the upper end face of the cylindrical metal shell is fixedly provided with a circle of locking rods which are the same as the through holes in number and correspond to the through holes in position, and the top ends of the locking rods are located in the through holes. The nut fixedly sleeved on the outer surface of the bolt is used for preventing the connection between the bolt and the nut from loosening due to long-time vibration, so that the connection strength between the bolt and the nut is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a high-strength bolt. Background Art

[0002] A bolt is a common fastener used to connect or fix two or more components. It consists of a head and a screw (a cylinder with external threads). It needs to be used with a nut to fasten two parts with through holes. This type of connection is called a bolt connection.

[0003] High-strength bolts are fasteners with high tensile strength. They are widely used in the connection of various important mechanical equipment, building structures and other fields that require high-strength connections. High-strength bolts can be divided into different grades, such as grade 8.8, grade 10.9, grade 12.9, etc. These grades represent the tensile strength and yield strength of the bolts. The higher the number, the greater the strength.

[0004] However, when this bolt is used in a vibrating environment for a long time, the connection between it and the nut may loosen, and the connection strength of this bolt is low; therefore, it does not meet the existing needs. In this regard, we have proposed a high-strength bolt. Utility Model Content

[0005] The purpose of the present invention is to provide a high-strength bolt to solve the problems raised in the above background technology, such as the possibility of loosening the connection between the bolt and the nut when the bolt is used in a vibrating environment for a long time and the low connection strength of the bolt.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-strength bolt, comprising a bolt, one side of the outer surface of the bolt being connected to a nut via a threaded structure, and a lower end surface of the nut being provided with a circle of through holes penetrating the nut;

[0007] A wooden fixing head is fixed on the lower end surface of the bolt, a cylindrical metal shell is provided on the outer side of the wooden fixing head, a connecting groove is provided in the middle position of the upper end surface of the cylindrical metal shell, and the cylindrical metal shell is sleeved on the outer surface of the wooden fixing head through the connecting groove;

[0008] A circle of locking rods, the number of which is equal to the number of the through holes and the positions of which are corresponding to the through holes, is fixedly provided on the outer side of the upper end surface of the cylindrical metal shell, and the top ends of the locking rods are located inside the through holes;

[0009] A manual rotating shaft is connected to the middle position of the lower end surface of the cylindrical metal shell through a roller bearing, and a first bevel gear is provided on the upper fixed sleeve of the outer surface of the manual rotating shaft, and a second bevel gear is meshed on both sides of the outer surface of the first bevel gear. The axis of the second bevel gear is connected to a transmission shaft, and a capless screw is provided on one side of the transmission shaft, which is located inside the cylindrical metal shell and connected to the cylindrical metal shell through a threaded structure. A square connecting groove is provided on the surface of the capless screw facing the transmission shaft, and a square shaft is provided inside the square connecting groove. The surface of the square shaft facing the transmission shaft is fixed to the transmission shaft, and the surface of the capless screw facing the wooden fixing head is conical.

[0010] Preferably, a manual rotating plate is fixedly provided at a middle position of the lower end surface of the manual rotating shaft, and the manual rotating shaft and the manual rotating plate are integrated.

[0011] Preferably, the cross-sectional shape of the square rotating shaft is a square, the outer surface of the square rotating shaft fits with the inner wall of the square connecting groove, and the square rotating shaft and the square connecting groove are slidably connected.

[0012] Preferably, both sides of the outer surface of the transmission shaft are connected to the cylindrical metal shell through roller bearings, and the second bevel gear is fixedly connected to the transmission shaft through a socket joint.

[0013] Preferably, the wooden fixing head is integrally made of wooden strips, and the wooden fixing head is fixed to the lower end surface of the bolt by screws.

[0014] Preferably, the outer surface of the wooden fixing head is in contact with the inner wall of the connecting groove, and the wooden fixing head and the connecting groove are slidably connected.

[0015] Preferably, an arc-shaped cover plate is provided on the front and rear sides of the manual rotating shaft and is located on the outer surface of the cylindrical metal shell, and the cylindrical metal shell and the arc-shaped cover plate are fixed by screws.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The present invention provides a method for fastening the nut to the outer surface of the bolt, so that the top end of the bolt and the nut are in contact with the fixed part, and the nut is tightened and tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is the main view of the internal structure of the utility model;

[0020] Figure 3 For this utility model Figure 2 A magnified view of the structure at point A;

[0021] Figure 4 For this utility model Figure 3 A magnified view of the structure at point B.

[0022] In the figure: 1. Bolt; 2. Nut; 3. Through hole; 4. Cylindrical metal housing; 5. Locking lever; 6. Wooden fixing head; 7. Connecting groove; 8. Manual rotating shaft; 9. First bevel gear; 10. Manual rotating plate; 11. Second bevel gear; 12. Transmission shaft; 13. Square shaft; 14. Capless screw; 15. Square connecting groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] The bolt 1 (model GB / T 1231), the nut 2 (model DIN 6915) and the capless point screw 14 (model ST-2.2) mentioned in the present invention can be purchased from the market or obtained through private customization.

[0025] See also Figures 1 to 4The present invention provides an embodiment of a high-strength bolt, comprising a bolt 1, a nut 2 connected to one side of the outer surface of the bolt 1 through a threaded structure, and a through hole 3 penetrating the lower end surface of the nut 2;

[0026] A wooden fixing head 6 is fixed to the lower end surface of the bolt 1. A cylindrical metal shell 4 is provided on the outer side of the wooden fixing head 6. A connecting groove 7 is provided in the middle of the upper end surface of the cylindrical metal shell 4. The cylindrical metal shell 4 is sleeved on the outer surface of the wooden fixing head 6 through the connecting groove 7.

[0027] A circle of locking rods 5, the number of which is equal to and the position of which are corresponding to the through holes 3, is fixedly provided on the outer side of the upper end surface of the cylindrical metal shell 4, and the top ends of the locking rods 5 are located inside the through holes 3;

[0028] A manual rotating shaft 8 is connected to the middle position of the lower end surface of the cylindrical metal shell 4 through a roller bearing, and a first bevel gear 9 is provided on the upper fixed sleeve of the outer surface of the manual rotating shaft 8. A second bevel gear 11 is meshed on both sides of the outer surface of the first bevel gear 9, and the axis of the second bevel gear 11 is connected to a transmission shaft 12. A capless screw 14 is provided on one side of the transmission shaft 12, which is located inside the cylindrical metal shell 4 and connected to the cylindrical metal shell 4 through a threaded structure. A square connecting groove 15 is provided on the surface of the capless screw 14 facing the transmission shaft 12, and a square shaft 13 is provided inside the square connecting groove 15. The surface of the square shaft 13 facing the transmission shaft 12 is fixed to the transmission shaft 12, and the surface of the capless screw 14 facing the wooden fixing head 6 is conical; when the bolt 1 is needed, the bolt 1 is passed through the two parts with through holes, and then the nut 2 is put on the outer surface of the bolt 1, and it is ensured that the top end of the bolt 1 and the nut 2 are both in fit with the fixed parts. When the nut 2 is put on the bolt 1, the multiple locking rods 5 fixed on the upper end surface of the cylindrical metal shell 4 are respectively aligned with the multiple through holes 3 located on the outer surface of the nut 2, and the locking rods 5 are inserted into the inside of the through holes 3 to connect the nut 2 and the cylindrical metal shell 4. In the process of inserting the locking rods 5 into the through holes 3, the cylindrical metal shell 4 is put on the outer surface of the wooden fixing head 6 through the connecting groove 7 located on the upper end surface of the cylindrical metal shell 4. When the upper end surface of the cylindrical metal shell 4 is in contact with the lower end surface of the bolt 1, the manual rotating shaft 8 located on the lower end surface of the cylindrical metal shell 4 is manually rotated. When the manual rotating shaft 8 rotates, the first bevel gear 9 fixed on the outer surface of the manual rotating shaft 8 and the second bevel gear 11 meshing with the first bevel gear 9 will rotate together. The rotating second bevel gear 11 can drive the transmission shaft 12 connected to the axis of the second bevel gear 11 and the square shaft 13 fixed between the transmission shaft 12 to rotate synchronously.

[0029] The cross-section of the square shaft 13 is a square. The outer surface of the square shaft 13 fits in with the inner wall of the square connecting groove 15, and the square shaft 13 and the square connecting groove 15 are slidably connected. Since the outer surface of the square shaft 13 fits in with the inner wall of the square connecting groove 15 located on the outer surface of the capless screw 14, when the square shaft 13 rotates, the capless screw 14 will rotate along with it. Driven by the thread structure, the rotating capless screw 14 can move left and right. At this time, the capless screw 14 is moved toward the direction of the wooden fixing head 6. As the capless screw 14 rotates, the wooden fixing head 6 is tightened. The pointed screw 14 rotates and moves at the same time, and the top end of the capless pointed screw 14 will drill into the interior of the wooden fixing head 6. When the capless pointed screw 14 drills into the interior of the wooden fixing head 6, the wooden fixing head 6 and the cylindrical metal shell 4 will be fixed accordingly. When the cylindrical metal shell 4 is fixed, the nut 2 connected thereto will also be fixed accordingly. The above technical solution can fix the nut 2 sleeved on the outer surface of the bolt 1, so as to prevent the connection between the bolt 1 and the nut 2 from loosening due to long-term vibration, thereby improving the connection strength between the bolt 1 and the nut 2.

[0030] A manual rotating plate 10 is fixedly provided at the middle position of the lower end surface of the manual rotating shaft 8, and the manual rotating shaft 8 and the manual rotating plate 10 are made into an integrated whole; the manual rotating shaft 8 can be rotated more conveniently through the manual rotating plate 10.

[0031] Both sides of the outer surface of the transmission shaft 12 are connected to the cylindrical metal shell 4 through roller bearings, and the second bevel gear 11 and the transmission shaft 12 are fixedly connected by sockets; the roller bearing structure between the transmission shaft 12 and the cylindrical metal shell 4 can prevent the rotating transmission shaft 12 from tilting.

[0032] The wooden fixing head 6 is made of an integrated wooden strip, and the wooden fixing head 6 is fixed to the lower end surface of the bolt 1 by a screw; when the nut 2 needs to be removed, the manual rotating shaft 8 is rotated in the opposite direction to remove the capless screw 14 from the inside of the wooden fixing head 6. When the capless screw 14 is completely removed from the inside of the wooden fixing head 6, the cylindrical metal shell 4 is removed first. When the cylindrical metal shell 4 is removed, the fixation of the nut 2 will also be released, and then the nut 2 connected to the outer surface of the bolt 1 through the threaded structure can be removed. If the nut 2 is disassembled and assembled too many times, the outer surface of the wooden fixing head 6 is full of holes caused by the capless screw 14 drilling into it, and it is unable to provide high fixing strength for the cylindrical metal shell 4, the screws fixing the wooden fixing head 6 can be removed and the wooden fixing head 6 can be replaced.

[0033] The outer surface of the wooden fixing head 6 fits in with the inner wall of the connecting groove 7, and the wooden fixing head 6 and the connecting groove 7 are slidingly connected; the wooden fixing head 6, whose outer surface fits in with the inner wall of the connecting groove 7, can prevent the cylindrical metal shell 4 from shaking.

[0034] An arc-shaped cover plate is provided on the front and rear sides of the manual rotating shaft 8 and is located on the outer surface of the cylindrical metal shell 4, and the cylindrical metal shell 4 and the arc-shaped cover plate are fixed by screws; the arc-shaped cover plate can protect the internal structure of the manual rotating shaft 8, and when the internal structure of the manual rotating shaft 8 fails, the arc-shaped cover plate can be removed for inspection and maintenance.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A high-strength bolt, comprising a bolt (1), characterized in that: One side of the outer surface of the bolt (1) is connected to a nut (2) via a threaded structure, and the lower end surface of the nut (2) is provided with a circle of through holes (3) penetrating the nut (2); A wooden fixing head (6) is fixedly provided on the lower end surface of the bolt (1), a cylindrical metal shell (4) is provided on the outer side of the wooden fixing head (6), a connecting groove (7) is provided in the middle position of the upper end surface of the cylindrical metal shell (4), and the cylindrical metal shell (4) is sleeved on the outer surface of the wooden fixing head (6) through the connecting groove (7); A circle of locking rods (5) whose number is the same as the number of the through holes (3) and whose positions correspond to the through holes (3) is fixedly provided on the outer side of the upper end surface of the cylindrical metal shell (4), and the top ends of the locking rods (5) are located inside the through holes (3); A manual rotating shaft (8) is connected to the middle position of the lower end surface of the cylindrical metal shell (4) through a roller bearing, and a first bevel gear (9) is provided on the upper fixed sleeve of the outer surface of the manual rotating shaft (8), and a second bevel gear (11) is meshed on both sides of the outer surface of the first bevel gear (9), and the axis of the second bevel gear (11) is connected to a transmission shaft (12), and a capless screw (14) is provided on one side of the transmission shaft (12), which is located inside the cylindrical metal shell (4) and connected to the cylindrical metal shell (4) through a threaded structure, and a square connecting groove (15) is provided on the surface of the capless screw (14) facing the transmission shaft (12), and a square rotating shaft (13) is provided inside the square connecting groove (15), and the surface of the square rotating shaft (13) facing the transmission rotating shaft (12) is fixed to the transmission rotating shaft (12), and the surface of the capless screw (14) facing the wooden fixing head (6) is conical.

2. A high-strength bolt according to claim 1, characterized in that: A manual rotating plate (10) is fixedly provided at the middle position of the lower end surface of the manual rotating shaft (8), and the manual rotating shaft (8) and the manual rotating plate (10) are integrated.

3. The high-strength bolt according to claim 1, characterized in that: The cross-sectional shape of the square rotating shaft (13) is a square, the outer surface of the square rotating shaft (13) fits into the inner wall of the square connecting groove (15), and the square rotating shaft (13) and the square connecting groove (15) are slidably connected.

4. The high-strength bolt according to claim 1, characterized in that: Both sides of the outer surface of the transmission shaft (12) are connected to the cylindrical metal shell (4) via roller bearings, and the second bevel gear (11) is fixedly connected to the transmission shaft (12) via a socket joint.

5. The high-strength bolt according to claim 1, characterized in that: The wooden fixing head (6) is integrally made of wooden strips, and the wooden fixing head (6) is fixed to the lower end surface of the bolt (1) by screws.

6. The high-strength bolt according to claim 1, characterized in that: The outer surface of the wooden fixing head (6) fits into the inner wall of the connecting groove (7), and the wooden fixing head (6) and the connecting groove (7) are connected in a sliding manner.

7. The high-strength bolt according to claim 1, characterized in that: A curved cover plate is provided on the front and rear sides of the manual rotating shaft (8) and is located on the outer surface of the cylindrical metal shell (4), and the cylindrical metal shell (4) and the curved cover plate are fixed by screws.

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