Unilateral bolt fastening assembly

Abstract

The utility model provides a unilateral bolt fastening assembly, relates to the technical field of mechanical assembly, and aims to solve the problem that the conventional bolt fastening structure cannot meet the fastening requirement of a component with a closed section or a component which is inconvenient to operate on the other side. The unilateral bolt fastening assembly comprises a connecting bolt, a supporting sleeve and a locking nut, the connecting bolt comprises a nut and a screw rod, the nut comprises a middle section right opposite to and connected with the screw rod and limiting sections arranged on the two sides of the middle section respectively, and the connecting bolt and the supporting sleeve can penetrate through the first through hole and the second through hole. The supporting sleeve is provided with a containing through hole allowing the screw to penetrate through, a first end face and a second end face, the first end face and the second end face are opposite, a limiting groove extending in the direction of the second end face is formed in the first end face, and a step face used for abutting against the nut is formed in the groove bottom wall of the limiting groove; and the locking nut is used for being screwed on the screw rod. According to the utility model, the fastening requirement of a component with a closed section or a component which is inconvenient to operate on the other side can be met.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly technology, and more specifically, to a single-sided bolt fastening assembly. Background Technology

[0002] In the field of mechanical assembly, bolts are often used to fasten components. However, with the commonly used bolts, workers need to operate from both sides of the component when fastening it. Although this method of connection is simple to operate and the resulting structure has good load-bearing capacity, it is only suitable for open-section components. In certain special cases, such as closed-section components or components where it is inconvenient to work from the other side, this conventional bolt fastening structure cannot be used. Utility Model Content

[0003] The purpose of this utility model is to provide a single-sided bolt fastening assembly to solve the technical problem that existing bolt fastening structures cannot meet the fastening requirements of closed-section components or components for which it is inconvenient to work on the other side.

[0004] This utility model provides a single-sided bolt fastening assembly for connecting a first component and a second component. The first component has a first through hole, and the second component has a second through hole opposite to the first through hole. The single-sided bolt fastening assembly includes a connecting bolt, a support sleeve, and a locking nut. The connecting bolt includes a nut and a screw. The nut includes a middle section directly opposite and connected to the screw and limiting sections on both sides of the middle section. The connecting bolt and the support sleeve can pass through the first through hole and the second through hole. The support sleeve has a receiving through hole for the screw to pass through and a first end face and a second end face facing away from each other. The first end face has a limiting groove extending towards the second end face, and the bottom wall of the limiting groove forms a stepped surface for abutting against the nut. The locking nut is used to screw onto the screw after the screw extends out of the receiving through hole. The connecting bolt has a pre-installed position where the limiting section is supported on the first end face, and a fastening position where the limiting section is rotated into the limiting groove and abuts against the stepped surface.

[0005] Furthermore, the nut is dovetail-shaped.

[0006] Furthermore, the distance from the stepped surface to the second end face is less than the stacking thickness of the first component and the second component at the first through hole and the second through hole.

[0007] Furthermore, the single-sided bolt fastening assembly also includes a washer, which is used to fit onto the screw and is located between the support sleeve and the locking nut.

[0008] Furthermore, the diameter of the central hole of the gasket is larger than the outer diameter of the screw.

[0009] Furthermore, a slot is formed on the end face of the screw opposite to the nut.

[0010] Furthermore, the sidewall of the limiting groove is provided with a limiting surface for tightly fitting the vertical surface of the limiting section.

[0011] Furthermore, the limiting surface is provided on both sides of the limiting segment.

[0012] Furthermore, along the axial direction of the accommodating through hole, the outer contour projection shape of the support sleeve is rectangular.

[0013] Furthermore, the intermediate section and the limiting section are integrally formed, and the nut and the screw are integrally formed.

[0014] The beneficial effects of this single-sided bolt fastening assembly are:

[0015] By setting up a single-sided bolt fastening assembly mainly composed of a connecting bolt, a support sleeve, and a lock nut, when connecting the first and second components, the thread of the connecting bolt can first be inserted into the receiving through hole of the support sleeve, and the connecting bolt can be positioned in the pre-installed position supported by the limiting section of the nut on the first end face. Then, the connecting bolt and the support sleeve are fed together into the connecting holes opened in both the first and second components, wherein the nut of the connecting bolt faces the closed section of the component or the side inconvenient for operation, and the thread of the connecting bolt faces the open section or the side convenient for operation. Afterwards, the thread is rotated so that the nut rotates relative to the support sleeve, so that the limiting section rotates to the position opposite to the limiting groove. Then, the thread is pulled so that the limiting section is engaged in the limiting groove and abuts against the stepped surface, so that the connecting bolt is in the fastened position. The lock nut is screwed onto the end of the thread that extends from the receiving through hole, and the fastening action of the lock nut abuts against the component on the open side, so that the first and second components are connected together by the connecting bolt. Specifically, after the assembly and connection of the first and second components are completed, the nut abuts against the surface of the closed component while also abutting against the surface of the closed component, and the locking nut abuts against the component on the open side, so that one end of the connecting bolt is axially limited by the stepped surface and the closed component, while the other end of the connecting bolt is axially limited by the locking nut.

[0016] Therefore, by setting up the aforementioned single-sided bolt fastening assembly, it is possible to connect closed-section components or two components where it is inconvenient to work on the other side, and the operation is convenient and efficient. Furthermore, this type of single-sided bolt fastening assembly can be easily installed and removed, making it particularly suitable for structures that require regular maintenance, replacement, or adjustment.

[0017] In addition, after the first and second components are connected together using the single-sided bolt fastening assembly, the rotational freedom of the connecting bolt is restricted by the support sleeve because the nut is inserted into the limiting groove, thereby effectively preventing the connecting bolt from loosening and ensuring the reliability of the connection between the first and second components. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram showing how a single-sided bolt fastening assembly, provided in an embodiment of this utility model, connects a first component and a second component together;

[0020] Figure 2 This is an exploded view of the single-sided bolt fastening assembly provided in an embodiment of the present utility model.

[0021] Figure 3 A schematic diagram of the structure of the single-sided bolt fastening assembly provided in this embodiment of the utility model, showing the connecting bolt in the pre-installed position;

[0022] Figure 4 A schematic diagram of the single-sided bolt fastening assembly provided in an embodiment of this utility model with the connecting bolt in the fastening position;

[0023] Figure 5 A schematic diagram of the connecting bolt of the single-sided bolt fastening assembly provided in this embodiment of the utility model;

[0024] Figure 6 A schematic diagram of the support sleeve of the single-sided bolt fastening assembly provided in this embodiment of the utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 010 - First component; 020 - Second component;

[0027] 100 - Connecting bolt; 200 - Support sleeve; 300 - Locking nut; 400 - Washer;

[0028] 110 - Nut; 111 - Intermediate section; 112 - Limiting section; 120 - Screw; 121 - Slotted groove;

[0029] 210 - First end face; 220 - Second end face; 230 - Accommodating through hole; 240 - Limiting groove; 241 - Stepped surface; 242 - Limiting surface. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0031] Figure 1 This is a schematic diagram showing how the single-sided bolt fastening assembly provided in this embodiment connects the first component 010 and the second component 020 together. (See diagram below.) Figure 1 As shown, this embodiment provides a single-sided bolt fastening assembly for connecting a first component 010 and a second component 020, wherein the first component 010 has a first through hole and the second component 020 has a second through hole opposite to the first through hole.

[0032] Figure 2 This is an exploded view of the single-sided bolt fastening assembly provided in this embodiment. Figure 2 As shown, the single-sided bolt fastening assembly includes a connecting bolt 100, a support sleeve 200, and a locking nut 300. Specifically, the connecting bolt 100 includes a nut 110 and a screw 120. The nut 110 includes an intermediate section 111 that is directly opposite to and connected to the screw 120, and limiting sections 112 that are respectively disposed on both sides of the intermediate section 111. The connecting bolt 100 and the support sleeve 200 can pass through the first through hole and the second through hole. The support sleeve 200 has a receiving through hole 230 for the screw 120 to pass through, and a first end face 210 and a second end face 220 facing away from each other. The first end face 210 has a limiting groove 240 extending towards the second end face 220. The bottom wall of the limiting groove 240 forms a stepped surface 241 for abutting against the nut 110. The locking nut 300 is used to screw onto the screw 120 after the screw 120 extends out of the receiving through hole 230.

[0033] Figure 3 This is a schematic diagram of the connection bolt 100 of the single-sided bolt fastening assembly provided in this embodiment in a pre-installed position. Figure 4 This is a structural schematic diagram of the single-sided bolt fastening assembly provided in this embodiment with the connecting bolt 100 in the fastened position. The connecting bolt 100 has a limiting section 112 supported at a pre-installed position on the first end face 210, such as... Figure 3 As shown, and the fastening position where the limiting segment 112 rotates into the limiting groove 240 and abuts against the step surface 241, as... Figure 4 As shown.

[0034] When connecting the first component 010 and the second component 020, the thread 120 of the connecting bolt 100 can be inserted into the receiving through hole 230 of the support sleeve 200, and the connecting bolt 100 can be positioned in the pre-installed position supported by the limiting section 112 of the nut 110 on the first end face 210. Then, the connecting bolt 100 and the support sleeve 200 are inserted together into the connecting holes opened in both the first component 010 and the second component 020. The nut 110 of the connecting bolt 100 faces the closed section of the component or the side where operation is inconvenient. At this time, the thread 120 of the connecting bolt 100 faces the open section or... The side that facilitates operation; then, rotate the screw 120 so that the nut 110 rotates relative to the support sleeve 200, so that the limiting section 112 rotates to a position opposite to the limiting groove 240. Then, pull the screw 120 so that the limiting section 112 is engaged in the limiting groove 240 and abuts against the step surface 241, so that the connecting bolt 100 is in a tightened position; screw the locking nut 300 onto the end of the screw 120 that extends from the receiving through hole 230, and use the tightening action of the locking nut 300 to abut against the component on the open side, so that the first component 010 and the second component 020 are connected together by the connecting bolt 100. Specifically, after the assembly and connection of the first component 010 and the second component 020 are completed, the nut 110 abuts against the step surface 241 and the surface of the closed component at the same time, while the locking nut 300 abuts against the open component, so that one end of the connecting bolt 100 is axially limited by the step surface 241 and the closed component, while the other end of the connecting bolt 100 is axially limited by the locking nut 300.

[0035] Therefore, by setting up the aforementioned single-sided bolt fastening assembly, it is possible to connect closed-section components or two components where it is inconvenient to work on the other side, and the operation is convenient and efficient. Furthermore, this type of single-sided bolt fastening assembly can be easily installed and removed, making it particularly suitable for structures that require regular maintenance, replacement, or adjustment.

[0036] In addition, after the first component 010 and the second component 020 are connected together using the single-sided bolt fastening assembly, the rotational freedom of the connecting bolt 100 is restricted by the support sleeve 200 because the nut 110 is inserted into the limiting groove 240, thereby effectively preventing the connecting bolt 100 from loosening and ensuring the connection reliability between the first component 010 and the second component 020.

[0037] In this embodiment, the phase difference between the pre-installed position and the fastened position is 90°.

[0038] In this embodiment, the first component 010 is a closed cross-section component, and the second component 020 is an open cross-section component.

[0039] Figure 5This is a structural schematic diagram of the connecting bolt 100 of the single-sided bolt fastening assembly provided in this embodiment. Please continue to refer to... Figure 1 and combined Figure 5 In this embodiment, the nut 110 is dovetail shaped.

[0040] By setting the nut 110 of the connecting bolt 100 to a dovetail shape, on the one hand, the connecting bolt 100 has a stronger ability to prevent rotation. After the connecting bolt 100 rotates 90° to switch from the pre-installed position to the tightened position, the limiting sections 112 on both sides can be firmly locked into the limiting groove 240, reducing the risk of rotational slippage of the connecting bolt 100 and effectively preventing axial loosening after the locking nut 300 is tightened. On the other hand, after the single-sided bolt fastening assembly connects the first component 010 and the second component 020 together, the relatively enlarged limiting sections 112 at both ends of the nut 110 can be used to increase the contact area, reduce local stress concentration, and make the force on the first component 010 and the second component 020 more uniform. This avoids deformation of the first and second through holes and local damage to the connecting bolt 100 caused by single-point force, thereby improving the connection durability.

[0041] In addition, setting the nut 110 to a dovetail shape increases the nut 110's adaptability to the assembly of the first through hole and the second through hole, making it more tolerant of machining errors of the first through hole and the second through hole, reducing the difficulty of installation alignment, and improving construction efficiency.

[0042] Figure 6 This is a structural schematic diagram of the support sleeve 200 of the single-sided bolt fastening assembly provided in this embodiment. Figure 6 As shown, the distance from the step surface 241 to the second end face 220 is h, and the stacking thickness of the first component 010 and the second component 020 at the first through hole and the second through hole is b, where h < b.

[0043] This configuration ensures that after the first component 010 and the second component 020 are connected together using a single-sided bolt fastening assembly, the nut 110 of the connecting bolt 100 can abut against the surface of the first component 010, while the locking nut 300 abuts against the surface of the second component 020, thereby tightly connecting the first component 010 and the second component 020 together and ensuring the reliability of the connection between the first component 010 and the second component 020.

[0044] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the single-sided bolt fastening assembly may further include a washer 400, wherein the washer 400 is used to be fitted onto the screw 120, and the washer 400 is located between the support sleeve 200 and the locking nut 300.

[0045] The aforementioned gasket 400 allows the force exerted by the locking nut 300 to be transmitted to the second component 020 through the gasket 400, thereby reducing stress concentration in the second component 020.

[0046] In this embodiment, the diameter of the central hole of the gasket 400 is larger than the outer diameter of the screw 120.

[0047] This configuration allows the gasket 400 to be quickly fitted onto the screw 120, improving assembly efficiency.

[0048] Please continue to refer to Figure 1 and Figure 5 In this embodiment, a slot 121 is formed on the end face of the screw 120 away from the nut 110.

[0049] By opening a slot 121 on the free end face of the screw 120, it is convenient to apply rotational torque to the connecting bolt 100, and the slot 121 has a simple structure and low manufacturing cost.

[0050] Please continue to refer to Figure 2 and Figure 6 In this embodiment, the sidewall of the limiting groove 240 is provided with a limiting surface 242 for tightly fitting with the vertical surface of the limiting section 112.

[0051] When the connecting bolt 100 is in the tightened position, the vertical surface of the limiting section 112 will fit tightly against the limiting surface 242, so that the nut 110 is tightly stuck in the limiting groove 240, that is, the connecting bolt 100 is stably in the tightened position, effectively preventing the connecting bolt 100 from loosening.

[0052] Please continue to refer to Figure 2 and Figure 6 In this embodiment, limiting surfaces 242 are provided on both sides of the limiting segment 112. This arrangement can ensure the uniformity of force on both sides of the nut 110.

[0053] Please continue to refer to Figure 6 In this embodiment, the outer contour projection shape of the support sleeve 200 is rectangular along the axial direction of the accommodating through hole 230.

[0054] This design reduces the manufacturing difficulty of the support sleeve 200, thereby saving processing costs.

[0055] It should be noted that in this embodiment, the shapes of the first through hole and the second through hole are consistent with the shape and size of the support sleeve 200.

[0056] In this embodiment, the intermediate section 111 and the limiting section 112 are integrally formed structures, and the nut 110 and the screw 120 are integrally formed structures.

[0057] This configuration increases the structural strength of the connecting bolt 100, thereby ensuring the reliability of the connection between the first component 010 and the second component 020.

[0058] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0059] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] In the above embodiments, descriptions of directions such as "up", "down", and "side" are based on the accompanying drawings.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A single-sided bolt fastening assembly, characterized in that, For connecting a first component (010) and a second component (020), the first component (010) has a first through hole, and the second component (020) has a second through hole opposite to the first through hole; the single-sided bolt fastening assembly includes a connecting bolt (100), a support sleeve (200), and a locking nut (300), the connecting bolt (100) includes a nut (110) and a screw (120), the nut (110) includes an intermediate section (111) directly opposite and connected to the screw (120) and limiting sections (112) respectively disposed on both sides of the intermediate section (111), the connecting bolt (100) and the support sleeve (200) can pass through the first through hole and the second through hole; the support sleeve (200) has a function for allowing the screw ( 120) passes through the receiving through hole (230) and the opposite first end face (210) and second end face (220), the first end face (210) has a limiting groove (240) extending towards the second end face (220), the bottom wall of the limiting groove (240) forms a stepped surface (241) for abutting against the nut (110); the locking nut (300) is used to screw the screw (120) after the screw (120) extends out of the receiving through hole (230); wherein, the connecting bolt (100) has a pre-installed position in which the limiting segment (112) is supported on the first end face (210), and a fastening position in which the limiting segment (112) is rotated into the limiting groove (240) and abuts against the stepped surface (241).

2. The single-sided bolt fastening assembly according to claim 1, characterized in that, The nut (110) is in the shape of a swallowtail.

3. The single-sided bolt fastening assembly according to claim 1, characterized in that, The distance from the stepped surface (241) to the second end face (220) is less than the stacking thickness of the first component (010) and the second component (020) at the first through hole and the second through hole.

4. The single-sided bolt fastening assembly according to claim 1, characterized in that, The single-sided bolt fastening assembly also includes a washer (400), which is used to fit onto the screw (120) and is located between the support sleeve (200) and the locking nut (300).

5. The single-sided bolt fastening assembly according to claim 4, characterized in that, The diameter of the central hole of the gasket (400) is larger than the outer diameter of the screw (120).

6. The single-sided bolt fastening assembly according to claim 1, characterized in that, The end face of the screw (120) opposite to the nut (110) has a slot (121).

7. The single-sided bolt fastening assembly according to claim 1, characterized in that, The sidewall of the limiting groove (240) is provided with a limiting surface (242) for tightly fitting with the vertical surface of the limiting section (112).

8. The single-sided bolt fastening assembly according to claim 7, characterized in that, The limiting surface (242) is provided on both sides of the limiting segment (112).

9. The single-sided bolt fastening assembly according to claim 1, characterized in that, Along the axial direction of the receiving through hole (230), the outer contour projection shape of the support sleeve (200) is rectangular.

10. The single-sided bolt fastening assembly according to claim 1, characterized in that, The intermediate section (111) and the limiting section (112) are integrally formed structures, and the nut (110) and the screw (120) are integrally formed structures.

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