Large-size bolt external thread protection device

Abstract

The utility model relates to the technical field of bolt protection, in particular to a large-size bolt external thread protection device which comprises a bottom plate, at least two protection battens are vertically installed on the top face of the bottom plate, the positions of the protection battens can be adjusted in the radial direction of the bottom plate, and the multiple protection battens are annularly arranged. And a protection space in which a threaded column of a large-size bolt can be inserted is formed among the plurality of protection battens. The device can be suitable for large-size bolts with different diameters, the whole protection device can be directly pulled out in the axial direction of the bolt when the device is not used, and the device is simple in structure and convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt protection, in particular to a large-size bolt external thread protection device. Background Art

[0002] Since the crusher is subjected to high frequency and high impact loads during operation, the hammer bolts are usually made of high-strength alloy steel with sufficient strength and wear resistance to withstand the high impact loads during the crushing process, and the large-size bolts used in the crusher are generally 50-150 mm in diameter and about 1 meter in length.

[0003] After the bolts are processed, they need to be packaged and transported to the customer. Since the bolts are large in size and heavy in weight, the bumps and various conditions during the transportation of the bolts will cause the bolts to squeeze and collide with each other, resulting in damage to the external threads of the bolts. In order to protect the external threads, special transport boxes are generally required in the prior art. The cost of such transport boxes is relatively high. There is also a method of wrapping with flexible plastic bags, but this method of wrapping, packaging and subsequent disassembly are relatively cumbersome. Utility Model Content

[0004] The utility model aims to solve the problem that the thread teeth of large-size bolts are easily damaged during transportation, and proposes a large-size bolt external thread protection device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for protecting external threads of large-sized bolts comprises a base plate, at least two protection strips are vertically mounted on the top surface of the base plate, the positions of the protection strips can be adjusted radially along the base plate, a plurality of the protection strips are arranged in a ring, and a protection space is provided between the plurality of the protection strips for inserting the threaded column of the large-sized bolt.

[0007] The bottom plate is provided with through holes corresponding to the number and positions of the protective strips, and the through holes are arranged radially along the bottom plate. One end of the protective strip has a supporting portion, and the end with the supporting portion is provided with an assembly hole. The supporting portion of the protective strip abuts against the top surface of the bottom plate, and a connecting piece is provided at the bottom of the bottom plate. The connecting piece is fixed to the assembly hole and locks the position of the protective strip and the bottom plate.

[0008] The assembly hole is a blind hole, and the connecting piece is a self-tapping screw.

[0009] The assembly hole is a threaded hole, and the connecting piece includes an integrally formed stud portion and a head portion. The stud portion passes through the through hole and is threadedly connected to the threaded hole, and the head portion abuts against the bottom surface of the base plate.

[0010] The through hole includes a strip hole and a strip groove located at the upper end of the strip hole, and the protective strip includes a main plate and a protruding block located at the bottom end of the main plate. There is a stepped surface between the main plate and the protruding block, and the stepped surface abuts against the wall of the strip hole and the strip groove.

[0011] The protective strip is provided with a plurality of broken seams at intervals along its length direction.

[0012] The bottom plate and the protective strips are both made of plastic material.

[0013] The utility model proposes a large-size bolt external thread protection device, which has the beneficial effect that: when the device is used, the thread column part of the large-size bolt is placed in the protection space, and the thread column is protected by the protection strips. Different numbers of protection strips are set as required. The denser the protection strips are set, the better the protection effect. Moreover, since the position of the protection strips can be adjusted radially along the bottom plate, it can be suitable for large-size bolts of different diameters. When it is not needed, the entire protection device can be directly pulled out along the axial direction of the bolt. The device has a simple structure and is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of a half-section structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the cross-sectional front view structure of the protective strip of the utility model.

[0018] In the figure: the broken seam 1, the protective plate strip 2, the through hole 3, the abutment part 4, the bottom plate 5, the threaded hole 6, the stud part 7, the strip hole 8, the strip groove 9, the main body plate 10, the protruding block 11, the stepped surface 12, and the head 13. DETAILED DESCRIPTION

[0019] 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 of the embodiments.

[0020] Reference Figure 1-4A large-size bolt external thread protection device includes a base plate 5, at least two protection strips 2 are vertically installed on the top surface of the base plate 5, the position of the protection strips 2 can be adjusted radially along the base plate 5, several protection strips 2 are arranged in a ring, and there is a protection space between the several protection strips 2 for inserting the threaded column of the large-size bolt.

[0021] refer to Figure 1 When the device is in use, the threaded column part of the large-sized bolt is placed in the protective space, and the threaded column is protected by the protective strips 2. Different numbers of protective strips 2 are set as required. The denser the protective strips 2 are, the better the protective effect. In addition, since the position of the protective strips 2 can be adjusted radially along the bottom plate 5, it can be used for large-sized bolts of different diameters. When it is not needed, the entire protective device can be directly pulled out along the axial direction of the bolt. The device has a simple structure and is easy to install and disassemble.

[0022] As an assembly method for the base plate and the protective strips, the base plate 5 is provided with through holes 3 corresponding to the number and position of the protective strips 2, and the through holes 3 are radially arranged along the base plate 5. One end of the protective strip 2 has a supporting portion 4, and the end with the supporting portion 4 has an assembly hole. The supporting portion 4 of the protective strip 2 abuts against the top surface of the base plate 5, and a connecting piece is provided at the bottom of the base plate 5. The connecting piece is fixed to the assembly hole and locks the position of the protective strip 2 and the base plate 5. The supporting portion 4 at one end of the protective strip 2 abuts against the top surface of the base plate 5, and then the relative position of the protective strip 2 and the base plate 5 is locked and fixed through the cooperation of the connecting piece and the assembly hole.

[0023] As a locking method, the assembly hole is a blind hole, and the connecting piece is a self-tapping screw. The protective strip 2 is fixed to the base plate 5 by the self-tapping screw. The blind hole design is easier to manufacture, reduces the manufacturing difficulty, and does not require tapping.

[0024] As another locking method, the assembly hole is a threaded hole 6, and the connecting piece includes an integrally formed stud portion 7 and a head 13. The stud portion 7 passes through the through hole 3 and is threadedly connected to the threaded hole 6, and the head 13 rests against the bottom surface of the base plate 5. This method can be repeatedly disassembled and installed.

[0025] refer to Figure 3 , Figure 4 The through hole 3 includes a strip hole 8 and a strip groove 9 located at the upper end of the strip hole 8. The protective strip 2 includes a main plate 10 and a protruding block 11 located at the bottom end of the main plate 10. There is a step surface 12 between the main plate 10 and the protruding block 11. The step surface 12 abuts against the wall of the strip hole 8 and the strip groove 9. This matching method can make the abutment between the protective strip 2 and the bottom plate 5 more stable and facilitate the assembly of the two.

[0026] The protective strip 2 is provided with a plurality of breaking seams 1 at intervals along its length direction. During initial manufacturing, a longer protective strip 2 can be reserved so that during later use, protective strips 2 of different lengths can be obtained according to the required breaking.

[0027] The bottom plate 5 and the protective strip 2 are both made of plastic material, which is low in cost and can be used as a disposable material.

[0028] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technical solution, concept, and design obtained by equivalent replacement or change based on the technical solution and utility model concept of the utility model by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model.

Claims

1. A large-size bolt external thread protection device, characterized in that: It comprises a base plate (5), the top surface of which is vertically mounted with at least two protective strips (2), the position of which can be adjusted radially along the base plate (5), a plurality of the protective strips (2) being arranged in a ring shape, and a protective space between the plurality of the protective strips (2) into which threaded columns of large-sized bolts can be inserted.

2. A large-size bolt external thread protection device according to claim 1, characterized in that: The bottom plate (5) is provided with through holes (3) corresponding to the number and position of the protective strips (2), and the through holes (3) are arranged radially along the bottom plate (5). One end of the protective strip (2) has a supporting portion (4), and the end with the supporting portion (4) is provided with an assembly hole. The supporting portion (4) of the protective strip (2) abuts against the top surface of the bottom plate (5), and a connecting piece is provided at the bottom of the bottom plate (5). The connecting piece is fixed to the assembly hole and locks the position of the protective strip (2) and the bottom plate (5).

3. A large-size bolt external thread protection device according to claim 2, characterized in that: The assembly hole is a blind hole, and the connecting piece is a self-tapping screw.

4. A large-size bolt external thread protection device according to claim 2, characterized in that: The assembly hole is a threaded hole (6), and the connecting piece comprises an integrally formed stud portion (7) and a head portion (13); the stud portion (7) passes through the through hole (3) and is threadedly connected to the threaded hole (6), and the head portion (13) abuts against the bottom surface of the base plate (5).

5. A large-size bolt external thread protection device according to any one of claims 2 to 4, characterized in that: The through hole (3) comprises a strip hole (8) and a strip groove (9) located at the upper end of the strip hole (8); the protective plate strip (2) comprises a main plate (10) and a protruding block (11) located at the bottom end of the main plate (10); a stepped surface (12) is provided between the main plate (10) and the protruding block (11); the stepped surface (12) abuts against the wall of the strip hole (8) and the strip groove (9).

6. A large-size bolt external thread protection device according to any one of claims 2 to 4, characterized in that: The protective strip (2) is provided with a plurality of break seams (1) at intervals along its length direction.

7. A large-size bolt external thread protection device according to claim 6, characterized in that: The bottom plate (5) and the protective strip (2) are both made of plastic material.

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