Tensioning plate bolt

Abstract

The utility model discloses a tension plate bolt which comprises a screw rod and a bolt head arranged at one end of the screw rod, and further comprises a screw rod guide part arranged at the other end of the screw rod, and the outer diameter of the screw rod guide part is smaller than that of the screw rod. According to the tensioning plate bolt disclosed by the utility model, the screw rod guide part is arranged at the end part of the screw rod of the tensioning plate bolt, and the outer diameter of the bolt guide part is smaller than that of the screw rod, so that when the through hole in the tensioning plate is not aligned with the threaded hole in the end head plate to a certain degree, the screw rod can be screwed out; and the screw rod guide part of the tensioning plate bolt can also be conveniently inserted into the threaded hole of the end plate, so that the tensioning plate bolt is guided, and the tensioning plate and the end plate are conveniently and quickly in threaded connection.

Description

TECHNICAL FIELD

[0001] The utility model relates to preloading pile production technical field especially a tensioning plate bolt. BACKGROUND

[0002] In the prestressed concrete pile production process, generally need through the tensioning plate and the end head plate of the reinforcement cage end part through the bolt connection, then the tensioning machine passes through the tensioning plate and the end head plate to the main reinforcement and is tensioned to produce the prestressed main reinforcement.

[0003] However, the prior art in the end head plate and tensioning plate (or tail plate) bolt connection process has the following problems: since the end head plate is installed at both ends of the reinforcement cage, after the reinforcement cage and the end head plate are placed in the precast pile mold, the middle section of the reinforcement cage will be lowered due to gravity and contact the bottom plate surface of the precast pile mold, the end head plate will be inclined at a certain angle with the vertical surface due to the action of the reinforcement cage, and then when the tensioning plate and the end head plate are bolted, the through hole on the tensioning plate and the threaded hole on the end head plate will be misaligned, and then the bolt will not be screwed in, affecting the connection efficiency of the end head plate and the tensioning plate. SUMMARY

[0004] The utility model provides a tensioning plate bolt to solve the above problems.

[0005] The technical means adopted by the utility model are as follows:

[0006] A tensioning plate bolt, comprising a screw rod and a bolt head provided at one end of the screw rod, further comprising a screw rod guide portion provided at the other end of the screw rod, the outer diameter of the screw rod guide portion is smaller than the outer diameter of the screw rod.

[0007] Further, the outer diameter of the screw rod guide portion gradually increases from the end of the bolt to the start of the threaded screw rod.

[0008] Further, the screw rod guide portion is a conical frustum structure, so that its outer surface forms a conical guide surface.

[0009] Further, the end of the screw rod guide portion is an arc surface.

[0010] Further, it further comprises an annular abutting portion provided between the screw rod and the bolt head, and the outer diameter of the annular abutting portion is greater than the outer diameter of the screw rod.

[0011] Further, the outer diameter of the annular abutting portion is greater than or equal to the diameter of the circumscribed circle of the bolt head.

[0012] Further, the cross section of the bolt head is a regular polygon.

[0013] Further, the cross section of the bolt head is a regular hexagon.

[0014] Further, the adjacent two edges of the regular polygon are provided with guide bevels.

[0015] Further, the thread on the screw rod is a trapezoidal thread.

[0016] Compared with the prior art, the tension plate bolt disclosed by the utility model has the following beneficial effects: in the application, the screw rod guide part is arranged at the end of the screw rod of the tension plate bolt, and the outer diameter size of the screw rod guide part is smaller than the outer diameter size of the screw rod, so that when the through hole on the tension plate and the threaded hole on the end plate are misaligned to a certain extent, the screw rod guide part of the tension plate bolt can also be conveniently inserted into the threaded hole of the end plate, thereby guiding the tension plate bolt, so that the quick threaded connection of the tension plate and the end plate is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the tension plate bolt disclosed by the utility model.

[0018] Figure 2 It is a side view of the tension plate bolt disclosed by the utility model.

[0019] In the drawing: 1, tension plate bolt; 10, screw rod; 11, bolt head; 12, screw rod guide part; 13, conical guide surface; 14, arc surface; 15, annular abutting part; 16, guide bevel; 17, thread. DETAILED DESCRIPTION

[0020] As shown in Figure 1 and Figure 2 the tension plate bolt 1 disclosed by the utility model, comprising a screw rod 10 and a bolt head 11 arranged at one end of the screw rod 10, further comprising a screw rod guide part 12 arranged at the other end of the screw rod 10, and the outer diameter size of the screw rod guide part 12 is smaller than the outer diameter size of the screw rod 10.

[0021] Specifically, the tension plate bolt in the embodiment includes a screw rod 10 and a bolt head 11 arranged at one end of the screw rod 10. The screw rod 10 is a cylindrical body with external threads. A part or the whole length of the cylindrical body is provided with external threads for connecting with the threaded hole on the end plate. The bolt head 11 is a structure for screwing the bolt. A screw rod guide 12 is arranged at the other end of the screw rod 10. The outer diameter of the screw rod guide 12 is smaller than that of the screw rod 10. Therefore, when the tension plate and the end plate are connected by using the tension plate bolt 1 disclosed in the embodiment, the screw rod guide 12 of the tension plate bolt 1 can be easily inserted into the threaded hole of the end plate, and the tension plate bolt 1 is guided, so that the tension plate and the end plate are quickly connected, and the connection efficiency of the tension plate and the end plate is improved.

[0022] Further, the outer diameter of the screw rod guide 12 gradually increases from the end of the bolt to the start of the threads 17 on the screw rod 10.

[0023] Specifically, in the embodiment, the screw rod guide 12 can be a cylindrical structure with an outer diameter smaller than that of the screw rod 10. When the tension plate bolt connects the tension plate and the end plate, the screw rod guide 12 can be easily inserted into the threaded hole of the end plate, and the tension plate bolt 1 is guided, so that the tension plate and the end plate are quickly connected, and the connection efficiency of the tension plate and the end plate is improved. Preferably, the screw rod guide 12 is a structure with an outer diameter gradually increasing from the end of the bolt to the start of the threads 17 on the screw rod 10. The outer diameter of the screw rod guide 12 gradually increases, so that the tension plate bolt 1 in the embodiment can be easily connected with the tension plate and the end plate, and stress concentration on the tension plate bolt 1 is avoided, and the strength and service life of the tension plate bolt 1 are improved.

[0024] Further, the screw rod guide 12 is a circular conical structure, so that the outer surface forms a circular conical guide surface 13.

[0025] Specifically, in the embodiment, the screw rod guide 12 is a circular conical structure, so that the outer surface forms a circular conical guide surface 13. The circular conical structure is not only easy to process, but also has the advantages of good guiding performance.

[0026] Further, the end of the screw rod guide 12 is an arc surface 14.

[0027] Specifically, in the embodiment, the end of the screw guide part 12 is an arc surface 14, that is, the end of the screw guide part 12 is formed in a structure similar to a spherical cap or an elliptical spherical cap, so that the end of the screw guide part 12 can be further guided, and the formation of sharp corners can be avoided to ensure the safety of the workers and avoid damage to the threaded holes on the end plate by the sharp corners.

[0028] Further, an annular abutting part 15 is arranged between the screw 10 and the bolt head part 11, and the outer diameter of the annular abutting part 15 is greater than the outer diameter of the screw 10.

[0029] Specifically, in the embodiment, one end of the screw 10 is provided with the screw guide part 12, the other end of the screw 10 is provided with the annular abutting part 15, the other side of the annular abutting part 15 is provided with the bolt head part 11, and the outer diameter of the annular abutting part 15 is greater than the outer diameter of the screw 10. After the end plate is connected to the tension plate by the tension plate bolt disclosed in the embodiment, the end surface of the annular abutting part 15 abuts against the surface of the tension plate, and since the end surface of the annular abutting part 15 is a circular surface structure, the damage to the end surface of the tension plate caused by the cutting action of the annular abutting part 15 on the surface of the tension plate during the tightening of the tension plate bolt can be reduced.

[0030] Further, the outer diameter of the annular abutting part 15 is greater than or equal to the diameter of the circumscribed circle of the bolt head part 11.

[0031] Specifically, in the embodiment, the outer diameter of the annular abutting part 15 is greater than or equal to the diameter of the circumscribed circle of the bolt head part 11, that is, the contact area between the tension plate bolt and the tension plate is increased, and the acting force between the tension plate and the tension plate bolt is reduced, thereby improving the service life.

[0032] Further, the cross section of the bolt head part 11 is a regular polygon.

[0033] Specifically, in the embodiment, the cross section of the bolt head part 11 is a regular polygon, for example, a regular quadrilateral, a regular pentagon, a regular hexagon, etc., so that the bolt head part 11 can be easily operated by using a wrench or an electric tool.

[0034] Further, the cross section of the bolt head part 11 is a regular hexagon.

[0035] Specifically, in the embodiment, the cross section of the bolt head part 11 is a regular hexagon, so that the bolt head part 11 has good stress performance and can be easily operated by using a wrench or an electric tool.

[0036] Further, a guide bevel 16 is arranged between two adjacent sides of the regular polygon.

[0037] Specifically, in the embodiment, the adjacent two sides of the regular polygon are further provided with guide bevels 16, which further reduces the existence of sharp corners and facilitates the operation of the operator.

[0038] Further, the thread 17 on the screw rod 10 is a trapezoidal thread.

[0039] Specifically, in the embodiment, the thread on the screw rod can be a triangular thread, a trapezoidal thread and a zigzag thread, preferably, the trapezoidal thread is selected to improve the connection reliability between the bolt of the tensioning plate and the end plate and the tensioning plate.

[0040] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art within the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change, which should be covered in the protection scope of the present application.

Claims

1. A tension plate bolt comprising a screw shank (10) and a bolt head (11) arranged at one end of the screw shank (10), characterized in that: The screw guide part (12) is provided with a gradually increased outer diameter at the starting end of the thread (17) on the screw (10) by the end of the bolt.

2. The tension plate bolt of claim 1, wherein: The screw guide part (12) is provided with a gradually increased outer diameter at the starting end of the thread (17) on the screw (10) by the end of the bolt.

3. The tension plate bolt of claim 2, wherein: The screw guide part (12) is provided with a gradually increased outer diameter at the starting end of the thread (17) on the screw (10) by the end of the bolt.

4. The tension plate bolt of claim 3, wherein: The screw guide part (12) is provided with a gradually increased outer diameter at the starting end of the thread (17) on the screw (10) by the end of the bolt.

5. The tension plate bolt according to any one of claims 1 to 4, characterized in that: The screw guide part (12) is provided with a gradually increased outer diameter at the starting end of the thread (17) on the screw (10) by the end of the bolt.

6. The tension plate bolt of claim 5, wherein: The outer diameter of the annular abutting part (15) is greater than or equal to the diameter of the circumscribed circle of the bolt head (11).

7. The tension plate bolt of claim 6, wherein: The cross section of the bolt head (11) is a regular polygon.

8. The tension plate bolt of claim 7, wherein: The cross section of the bolt head (11) is a regular hexagon.

9. The tension plate bolt of claim 7, wherein: The adjacent two sides of the regular polygon are provided with a guide bevel (16).

10. The tension plate bolt of claim 1, wherein: The thread (17) on the screw (10) is a trapezoidal thread.

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