Bolt assembly structure and inspection tooling

Abstract

The present invention discloses a bolt assembly structure and an inspection tooling. The special paddle-shaped bolt includes a head and a screw rod portion connected to the head. The central axis of the head in the length direction intersects and is perpendicular to the axis of the screw rod portion. The head includes a first paddle portion and a second paddle portion that extend in opposite directions along the central axis in the length direction. The first paddle has a first inclined side that is inclined relative to the central axis in the length direction on the first side of the central axis in the length direction. The second paddle has a second inclined side that is inclined relative to the central axis in the length direction on the second side of the central axis in the length direction. The first inclined side gradually approaches the central axis in the length direction towards the center of the head, and the second inclined side gradually approaches the central axis in the length direction towards the center of the head. This special paddle-shaped bolt aims to solve the technical problem of the serious loosening risk existing in the T-shaped bolt in the prior art during fastening assembly.

Description

Technical Field

[0001] The present invention relates to the field of bolt assembly, and in particular to a special paddle-shaped bolt, a bolt assembly structure including the special paddle-shaped bolt, and an inspection tooling applied to the special paddle-shaped bolt. Background Art

[0002] Bolts are widely used in industrial equipment, and there are various types, specifications, and functions, suitable for different workplaces. Figures 1 to 3 Shown is a crossbeam 1 with a T-shaped bolt 3 installed in the prior art. The T-shaped bolt 3 is specifically installed in a long hole 2 of the crossbeam 1. The T-shaped bolt 3 is inserted into the long hole 2, and then the T-shaped bolt 3 is rotated 90° along the direction S, so that the long side of the T-shaped bolt 3 is blocked by stoppers (the first stopper 4 and the second stopper 5) on both sides of the long hole 2. The distance between the stoppers is designed as L in this state.

[0003] The arrangement of the stoppers below the long hole 2 is shown in Figure 4 , to make the long side of the T-shaped bolt 3 form a 90° angle with the long hole 2, the designed distance L between the stoppers must be ensured during manufacturing. In actual production, due to some reasons, this dimension cannot be ensured, and in the extreme case, L even becomes 0. At this time, when inserting and rotating the bolt, due to the limitation of the stoppers, the rotation angle β is much smaller than 90° (see Figure 5 ), resulting in a very small contact area and a serious risk of bolt loosening. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Based on this, the present invention provides a special paddle-shaped bolt, which aims to solve the technical problem of serious loosening risk when the T-shaped bolt in the prior art is used for fastening assembly.

[0006] (II) Technical Solutions

[0007] To solve the above technical problems, the present invention provides a special paddle-shaped bolt, which includes a head and a screw rod portion connected to the head. The central axis of the length direction of the head intersects and is perpendicular to the axis of the screw rod portion. The head includes a first paddle portion and a second paddle portion extending in opposite directions along the central axis of the length direction. The first paddle has a first inclined side inclined with respect to the central axis of the length direction on the first side of the central axis of the length direction. The second paddle has a second inclined side inclined with respect to the central axis of the length direction on the second side of the central axis of the length direction. The first inclined side gradually approaches the central axis of the length direction towards the center of the head, and the second inclined side gradually approaches the central axis of the length direction towards the center of the head.

[0008] Preferably, the first blade has a first straight edge parallel to the central axis in the length direction on the second side of the central axis in the length direction, and the second blade has a second straight edge parallel to the central axis in the length direction on the first side of the central axis in the length direction.

[0009] Preferably, the included angle between the first hypotenuse and the first straight edge is greater than or equal to 18°, and the included angle between the second hypotenuse and the second straight edge is greater than or equal to 18°.

[0010] Preferably, the surface of the head facing away from the screw part forms a spherical surface.

[0011] In addition, the present invention also provides a bolt assembly structure, which includes a structural body and the above-mentioned special paddle-shaped bolt. The structural body has a long hole. One side of the structural body has a first stop block and a second stop block. The first stop block and the second stop block are arranged on both sides of the long hole. The special paddle-shaped bolt is inserted through the long hole, and the first hypotenuse contacts and stops against the first stop block, and the second hypotenuse contacts and stops against the second stop block.

[0012] Preferably, the distance between the first stop block and the second stop block along the length direction of the long hole is 0.

[0013] Preferably, the structural body is a cross beam, and a sieve plate for classifying ore or flux is installed on the cross beam through the special paddle-shaped bolt.

[0014] Preferably, the rotation angle of the special paddle-shaped bolt relative to the long hole is greater than or equal to 70°.

[0015] In addition, the present invention also provides an inspection tool for the above-mentioned special paddle-shaped bolt. The inspection tool includes a U-shaped plate and a hole plate each having a long hole. The U-shaped plate is arranged on a bottom plate. The inner side surface of the U-shaped plate faces the bottom plate. The inner side of the U-shaped plate has a first stop block and a second stop block. The first stop block and the second stop block are arranged on both sides of the long hole. The special paddle-shaped bolt is used to pass through the long hole to connect the U-shaped plate and the hole plate, and the first hypotenuse is used to contact and stop against the first stop block, and the second hypotenuse is used to contact and stop against the second stop block.

[0016] Preferably, the distance between the first stop block and the second stop block along the length direction of the long hole is 0.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the beneficial effects of the special paddle-shaped bolt of the present invention include:

[0019] Due to the special first bevel and second bevel structures in the special paddle-shaped bolt, during assembly, it can adapt to the extreme position with a stop block spacing of 0 through bevel contact. In particular, by designing bevel contact, the contact area between the special paddle-shaped bolt and its matching structure (such as a crossbeam) is increased, and the strength and stiffness are enhanced, thereby improving the reliability of bolt fastening. The bolt is not easily loosened, and even if it is loosened, it is not easily disengaged from the long hole. In addition, when the special paddle-shaped bolt is applied to a crossbeam, no modification is required to the already fabricated crossbeam. The cost of manufacturing the bolt is much lower than modifying the crossbeam, the workload is much smaller, the repair speed is increased significantly, and on-site installation is very convenient with obvious effects. Starting from improving the bolt structure, the crossbeam that requires major repair is saved in the most convenient, fast, and cost-effective way.

[0020] Other beneficial effects of the present invention will be described one by one in the specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as imposing any limitation on the present invention. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a T-shaped bolt in the prior art before installation;

[0023] Figure 2 is a schematic structural diagram of a T-shaped bolt in the prior art after installation;

[0024] Figure 3 is a schematic plan view of a T-shaped bolt in the prior art after installation;

[0025] Figure 4 is a schematic structural diagram of a T-shaped bolt in the prior art from another perspective after installation;

[0026] Figure 5 is a schematic plan view of a T-shaped bolt in the prior art after installation when the distance between the stop blocks is not ideal;

[0027] Figure 6 is a three-dimensional schematic diagram of the special paddle-shaped bolt according to an embodiment of the present invention;

[0028] Figure 7 is a side view of the special paddle-shaped bolt according to an embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of the head of the special paddle-shaped bolt according to an embodiment of the present invention;

[0030] Figure 9 is another side view of the special paddle-shaped bolt according to an embodiment of the present invention;

[0031] Figure 10Schematic diagram of the installation of the special paddle-shaped bolt according to the embodiment of the present invention;

[0032] Figure 11 Another schematic diagram of the installation of the special paddle-shaped bolt according to the embodiment of the present invention;

[0033] Figure 12 Cross-sectional view of the bolt assembly structure according to the embodiment of the present invention;

[0034] Figure 13 Partial perspective view of the bolt assembly structure according to the embodiment of the present invention;

[0035] Figure 14 Stereo schematic diagram of the inspection tooling according to the embodiment of the present invention;

[0036] Figure 15 Planar schematic diagram of the inspection tooling according to the embodiment of the present invention;

[0037] Figure 16 Side view of the inspection tooling according to the embodiment of the present invention.

[0038] Explanation of reference numerals:

[0039] 1, cross beam; 2, long hole; 3, T-shaped bolt; 4, first stop block; 5, second stop block; 6, sieve plate; 7, locknut; 8, gasket; 9, U-shaped plate; 10, hole plate; 11, bottom plate; 100, head; 101, first paddle part; 102, second paddle part; 103, first bevel edge; 104, second bevel edge; 105, first straight edge; 106, second straight edge; 200, screw part.

[0040] The components not marked in the figure do not relate to the core inventive points of the present invention, so they are not marked one by one. Detailed implementation manners

[0041] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0042] See Figures 6 to 11The present invention provides a special paddle-shaped bolt, comprising a head 100 and a screw part 200 connected to the head 100, wherein the longitudinal center axis O of the head 100 intersects and is perpendicular to the axis O1 of the screw part 200, and the head 100 comprises a first paddle part 101 and a second paddle part 102 extending in opposite directions along the longitudinal center axis O, wherein the first paddle has a first hypotenuse 103 inclined relative to the longitudinal center axis O on the first side of the longitudinal center axis O, and the second paddle has a second hypotenuse 104 inclined relative to the longitudinal center axis O on the second side of the longitudinal center axis O, wherein the first hypotenuse 103 gradually approaches the longitudinal center axis O toward the center of the head 100, and the second hypotenuse 104 gradually approaches the longitudinal center axis O toward the center of the head 100. It can be understood that the longitudinal center axis O has only two sides, and the first side and the second side are two sides that are opposite to each other. Moreover, the first paddle part 101 and the second paddle part 102 are preferably symmetrical structures relative to the center of the head 100.

[0043] According to a preferred embodiment of the present invention, the first blade has a first straight edge 105 parallel to the longitudinal central axis O on the second side of the longitudinal central axis O, and the second blade has a second straight edge 106 parallel to the longitudinal central axis O on the first side of the longitudinal central axis O. However, the present invention is not limited thereto, and when necessary, the first straight edge 105 and the second straight edge 106 can be completely replaced by other structural forms, including forms similar to beveled edges.

[0044] According to a preferred embodiment of the present invention, the angle α between the first bevel 103 and the first straight side 105 is greater than or equal to 18°, and the angle α between the second bevel 104 and the second straight side 106 is greater than or equal to 18°. It will be mentioned later that the special design of α being 18° can ensure that the angle β of rotation relative to the installed long hole 2 when the special paddle-shaped bolt contacts and cooperates with the first stopper 4 and the second stopper 5 (see below) is greater than 70°, thereby ensuring the stability of the installation of the special paddle-shaped bolt. An example of the diameter of the screw part 200 and the width of the head 100 is 23 mm, and the thickness of the head 100 is 21 mm. Of course, the specific length dimension parameters are not limited. The core technical concept of the present invention is to design the special structure of the first blade part 101 and the second blade part 102 with the first bevel 103 and the second bevel 104. Its various detailed dimensional parameters should be suitable for the special paddle-shaped bolt to be applied to the installation structure with the first stopper 4 and the second stopper 5. When the installation stability is not easy to be separated, these parameter dimensions do not constitute a limitation to the present invention. Moreover, the special paddle-shaped bolt can completely keep the material (35CrMo 10.9 grade) of the existing T-shaped bolt with the same performance unchanged, but the present invention is not limited to this.

[0045] According to a specific embodiment of the present invention, the surface of the head 100 facing away from the screw part 200 forms a spherical surface. Specifically, an R45 spherical surface structure is formed in the thickness direction of the head 100. However, the present invention is obviously not limited thereto. Even if a solution without a spherical surface structure is designed, it should also fall within the protection scope of the present invention.

[0046] Based on the above special paddle-shaped bolt, referring to Figure 12 and Figure 13 , the present invention further provides a bolt assembly structure, including a structural body and the above special paddle-shaped bolt. The structural body has a long hole 2. One side of the structural body has a first stop block 4 and a second stop block 5. The first stop block 4 and the second stop block 5 are arranged on both sides of the long hole 2. The special paddle-shaped bolt is inserted through the long hole 2, and the first inclined side 103 contacts and stops against the first stop block 4, and the second inclined side 104 contacts and stops against the second stop block 5. Specifically, a locknut 7 and a gasket 8 can also be provided. Of course, the locknut 7 and the gasket 8 do not involve the core of the present invention and will not be elaborated here. Obviously, based on the above description of the special paddle-shaped bolt, in this bolt assembly structure, the excellent installation stability of the special paddle-shaped bolt is self-evident.

[0047] As a specific embodiment, referring to Figure 10 , the distance L ( Figure 10 not convenient to mark, can be understood in combination with Figure 11 ) between the first stop block 4 and the second stop block 5 along the length direction of the long hole 2 is 0. The rotation angle of the special paddle-shaped bolt relative to the long hole 2 is greater than or equal to 70°. That is, when the first stop block 4 and the second stop block 5 are in the extreme positions, the special paddle-shaped bolt is not easy to disengage after installation. Of course, the distance L is not limited to 0. Extreme cases greater than 0 or even slightly less than 0 are also possible, and various distance setting ranges are within the protection scope of the present invention. The distance being 0 is an extreme case. Usually, the distance between the first stop block 4 and the second stop block 5 is still slightly greater than zero. In this way, the rotation angle of the special paddle-shaped bolt will still be greater than 70°, which is more "safe". After tightening the nut, it basically will not loosen. In addition, even if the distance L between the first stop block 4 and the second stop block 5 is 25 mm, as Figure 11 shown, the rotation angle β of the special paddle-shaped bolt relative to the long hole 2 after installation is 94°. The contact area between the special paddle-shaped bolt and the cross beam 1 also meets the working position requirements, which shows that the special paddle-shaped bolt has good adaptability.

[0048] As a specific application, the structural body can be the cross beam 1. Of course, the structural body is not limited to the cross beam 1 and can be any suitable structural component as long as it can install the special paddle-shaped bolt provided by the present invention. The cross beam 1 is installed with a sieve plate 6 for classifying ore or flux through the special paddle-shaped bolt. During specific installation, the special paddle-shaped bolt can be pre-inclined by 45 degrees and then "wound into" the long hole 2. When inserting the bolt by the winding method, a chamfer of 8×45° can be set at the head 100 to prevent interference with the cross beam 1, but the present invention is not limited thereto. The installation method of the special paddle-shaped bolt and the specific shape of the head 100 can be changed according to needs.

[0049] It should be emphasized again that the advantages of the present invention are as follows: The fixing measure of the sieve plate 6 is very important. Once the sieve plate 6 falls off, the screening function will fail, and the sieve plate 6 falling into other components may even cause major equipment accidents. When the bolt cannot be in the normal working position due to the wrong position of the stop block on the cross beam 1, the usual idea is only to replace the cross beam 1, resulting in extremely huge losses in cost and construction period. This technical solution broadens the thinking. The significance of the present invention lies not only in improving a bolt structure, but also in a more profound sense: Without making any changes to the already fabricated cross beam 1, the cost of manufacturing the bolt is much lower than that of modifying the cross beam 1, the workload is much smaller, the repair speed is increased a lot, and the on-site installation is very convenient with obvious effects. Starting from improving the bolt structure, the cross beam 1 that needs major repair is saved in the most convenient, fast and cost-effective way. The unique special bolt structure type and dimension design also have reference significance for similar structures in the future.

[0050] In addition, refer to Figures 14 to 16, the present invention also provides an inspection tooling applied to the above-mentioned special paddle-shaped bolt. The inspection tooling includes a U-shaped plate 9 and a hole plate 10 each having a long hole 2. The U-shaped plate 9 is arranged on a bottom plate 11, and the inner side surface of the U-shaped plate 9 faces the bottom plate 11. The inner side of the U-shaped plate 9 has a first stop block 4 and a second stop block 5. Specifically, the bottom plate 11, the U-shaped plate 9, the hole plate 10, the first stop block 4 and the second stop block 5 can be welded together. The first stop block 4 and the second stop block 5 are arranged on both sides of the long hole 2. The special paddle-shaped bolt is used to pass through the long hole 2 to connect the U-shaped plate 9 and the hole plate 10, and the first hypotenuse 103 is used to contact and stop with the first stop block 4, and the second hypotenuse 104 is used to contact and stop with the second stop block 5. Preferably, the distance between the first stop block 4 and the second stop block 5 along the length direction of the long hole 2 is 0. Similarly, for some specific changes and explanations, reference can be made to the above description of the bolt assembly structure and will not be repeated here. This inspection tooling should be able to simulate the most unfavorable situation on site. Specifically, the length L1 and width D1 of the long hole 2 of the U-shaped plate 9 in the inspection tooling can be 60×24 (mm), but the inner height dimension H of the U-shaped plate 9 needs to consider the manufacturing deviation of the cross beam 1. According to the most unfavorable situation on site, the inner height dimension H is set to 25 mm, and the total height H0 of the U-shaped plate 9 and the hole plate 10 is guaranteed to be 50 mm (equivalent to the hole plate 10 being thickened by 5 mm). When inspecting whether the bolt can pass through the inspection tooling, it is required that the head 100 of the special paddle-shaped bolt can pass through the long hole 2 and "wind" into the inner side of the U-shaped plate 9. After the special paddle-shaped bolt is turned upright, it can rotate about 70° before contacting the first stop block 4 and the second stop block 5, then it is qualified. Obviously, these dimensional parameters can be appropriately adjusted according to actual needs and are not used to limit the present invention. This inspection tooling is simple and direct to use, without the need to use additional measuring tools for multi-directional comprehensive measurement, reducing the inspection time, improving the inspection efficiency, and ensuring the quality of the bolts to be inspected.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of this invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention.

[0052] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A bolt assembly structure, It is characterized in that Including the main structure and special paddle-shaped bolts, The special paddle-shaped bolt comprises a head and a screw portion connected to the head, the longitudinal center axis of the head intersects and is perpendicular to the axis of the screw portion, the head comprises a first paddle portion and a second paddle portion extending in opposite directions along the longitudinal center axis, the first paddle portion and the second paddle portion are symmetrically structured about the center of the head, the first paddle has a first hypotenuse inclined relative to the longitudinal center axis on a first side of the longitudinal center axis, the second paddle has a second hypotenuse inclined relative to the longitudinal center axis on a second side of the longitudinal center axis, the first hypotenuse gradually approaches the longitudinal center axis toward the center of the head, and the second hypotenuse gradually approaches the longitudinal center axis toward the center of the head; The structural body has a long hole, and one side of the structural body has a first stopper and a second stopper, the first stopper and the second stopper are arranged on both sides of the long hole, the special paddle-shaped bolt is passed through the long hole, and the first beveled edge contacts the first stopper to form a stopper, and the second beveled edge contacts the second stopper to form a stopper.

2. The bolt assembly structure according to claim 1, It is characterized in that The first blade has a first straight edge parallel to the longitudinal center axis on the second side of the longitudinal center axis, and the second blade has a second straight edge parallel to the longitudinal center axis on the first side of the longitudinal center axis.

3. The bolt assembly structure according to claim 2, It is characterized in that The included angle between the first hypotenuse and the first straight side is greater than or equal to 18°, and the included angle between the second hypotenuse and the second straight side is greater than or equal to 18°.

4. The bolt assembly structure according to any one of claims 1 to 3, It is characterized in that The surface of the head portion facing away from the screw portion forms a spherical surface.

5. The bolt assembly structure according to claim 1, It is characterized in that The spacing between the first stopper and the second stopper along the length direction of the long hole is 0.

6. The bolt assembly structure according to claim 5, It is characterized in that The main structure is a crossbeam, and the crossbeam is equipped with a sieve plate for classifying ore or flux through the special paddle-shaped bolts.

7. The bolt assembly structure according to claim 5, It is characterized in that The rotation angle of the dedicated paddle-shaped bolt relative to the long hole is greater than or equal to 70°.

8. An inspection tooling for a special paddle-shaped bolt, the special paddle-shaped bolt including a head and a screw rod portion connected to the head, the central axis of the length direction of the head intersecting perpendicularly with the axis of the screw rod portion, the head including a first paddle portion and a second paddle portion extending in opposite directions along the central axis of the length direction, the first paddle portion and the second paddle portion being symmetrically structured about the center of the head, the first paddle having a first bevel edge inclined relative to the central axis of the length direction on a first side of the central axis of the length direction, the second paddle having a second bevel edge inclined relative to the central axis of the length direction on a second side of the central axis of the length direction, the first bevel edge gradually approaching the central axis of the length direction towards the center of the head, and the second bevel edge gradually approaching the central axis of the length direction towards the center of the head; Characterized in that, the inspection tooling includes a U-shaped plate and a hole plate each having a long hole, the U-shaped plate being disposed on a bottom plate, the inner side surface of the U-shaped plate facing the bottom plate, the inner side of the U-shaped plate having a first stopper and a second stopper, the first stopper and the second stopper being arranged on both sides of the long hole, the special paddle-shaped bolt being used to pass through the long hole to connect the U-shaped plate and the hole plate, and the first bevel edge being used to contact and stop against the first stopper, and the second bevel edge being used to contact and stop against the second stopper.

9. The inspection tooling according to claim 8, Characterized in that, the distance between the first stopper and the second stopper along the length direction of the long hole is 0.

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