High-efficiency long-service-life temporary fastening mechanism

Abstract

The invention discloses an efficient long-service-life temporary fastening mechanism, and relates to the technical field of temporary fastening, the efficient long-service-life temporary fastening mechanism comprises a shell, a fastening unit and a driving unit, the front end of the fastening unit is used for pre-fixing a plurality of thin-wall parts, the rear end of the fastening unit penetrates through the front end wall of the shell and extends into the shell, and the front end of the peripheral wall of the driving unit is connected with the extending end of the fastening unit; the rear end of the driving unit penetrates through the rear end wall of the shell and extends outwards, a guide unit is fixedly arranged on the front end wall of the driving unit, and the front end of the guide unit extends into the fastening unit; the driving unit is used for driving the fastening unit to move along the guiding unit and driving the front end of the fastening unit to be opened or closed at the same time. The fastening unit can smoothly pass through a pre-connection hole with a large length-diameter ratio, the alignment precision is high, the working efficiency is greatly improved, the fastening unit can implement reliable fastening operation with large clamping force under the action of the driving unit and the guiding unit, and the automatic installation can be achieved, and manual installation is also facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of temporary fastening, in particular to a temporary fastening mechanism with high efficiency and long service life. Background Art

[0002] Fasteners are a type of mechanical parts used to achieve fastening connections. They are widely used in a variety of industries, including aerospace, energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics, etc. Before connecting and fixing thin-walled parts such as thin-walled plates and shell structures, a temporary fastening mechanism is usually required. The function of this mechanism is to insert it into the pre-connection holes of multiple thin-walled parts that need to be fastened to achieve pre-connection and fixation.

[0003] In practical applications, the design of temporary fastening mechanisms must take into account their own sufficient strength and stability as well as the convenience and efficiency of operation to ensure that the positions of various thin-walled parts can be firmly maintained during the pre-connection process. At the same time, it must also be easy to disassemble so that it can be quickly removed after the final fixed connection is completed without affecting the subsequent processing or assembly process. This flexibility and efficiency make temporary fastening mechanisms an indispensable tool in many industrial fields, especially in situations where components need to be frequently replaced and adjusted.

[0004] Existing temporary fastening mechanisms face many challenges when dealing with pre-connection holes with large aspect ratios: first, the difficulty in hole alignment leads to a lack of stability in the fastening head during movement, which affects the fastening effect; in addition, these mechanisms usually exhibit insufficient strength and rigidity, resulting in overall low efficiency and a short service life. The above defects make it difficult for them to provide stable and reliable fastening operations in long-term applications, and they cannot provide the necessary initial conditions for manual or automatic riveting processes, thus affecting the quality and performance of the final laminated structure. Summary of the invention

[0005] In view of this, the present invention provides a high-efficiency and long-life temporary fastening mechanism to solve the problems raised in the above background technology, and specifically discloses the following contents:

[0006] A high-efficiency and long-life temporary fastening mechanism, comprising a shell, a fastening unit and a driving unit, wherein the front end of the fastening unit is used to pre-fix a plurality of thin-walled parts, and the rear end penetrates the front end wall of the shell and extends into the shell, the front end of the peripheral wall of the driving unit is connected to the extension end of the fastening unit, the rear end of the driving unit penetrates the rear end wall of the shell and extends outward, and the front end wall of the driving unit is fixedly provided with a guide unit, and the front end of the guide unit extends into the interior of the fastening unit;

[0007] The driving unit is used to drive the fastening unit to move along the guiding unit, and at the same time drive the front end of the fastening unit to open or close.

[0008] Further, the fastening unit includes an expansion sleeve and a connecting frame, a plurality of through grooves are provided at the front end of the expansion sleeve, the expansion sleeve includes a fastening head, a truncated cone body and a cylinder connected in sequence from front to back, the through grooves include a first through groove arranged on the fastening head, a second through groove arranged on the truncated cone body and a fulcrum groove arranged at the front end of the cylinder, the first through groove, the second through groove and the fulcrum groove are connected, a through hole is provided at the center position of the front end wall of the shell, the rear end of the cylinder passes through the through hole and extends into the shell and is fixedly connected to the connecting frame, and the connecting frame is connected to the front end of the peripheral wall of the drive unit.

[0009] Furthermore, the diameter of the through hole is larger than the diameter of the cylinder.

[0010] Furthermore, the driving unit includes a driving column, the rear end of the shell is threadedly connected to the rear cover, the front end of the peripheral wall of the driving column is threadedly connected to the connecting frame, the rear end passes through the rear cover and extends outward and is fixedly connected with a bolt head, and the driving column is rotatably connected to the rear cover.

[0011] Furthermore, a gap is left between the bolt head and the rear cover to reduce wear.

[0012] Furthermore, it also includes a limit pin, the rear cover is provided with a limit hole adapted to the outer side of the limit pin, the drive column is provided with a limit groove adapted to the inner side of the limit pin, and the limit pin is used to limit the axial movement of the drive column.

[0013] Furthermore, the guide unit includes a guide column, the rear end of which is fixedly arranged at the center position of the front end wall of the driving column, the front end of the guide column passes through the connecting frame and extends into the expansion sleeve, and the inner side of the expansion sleeve is smoothly matched with the outer side of the guide column.

[0014] Furthermore, a slide groove adapted to the front connecting block is provided inside the shell.

[0015] The beneficial effects of the present invention are:

[0016] The fastening unit in the present invention can smoothly pass through the pre-connection hole with a large aspect ratio, with high alignment accuracy, greatly improving the work efficiency, and the fastening unit can repeatedly implement a reliable fastening operation with a large clamping force under the action of the driving unit and the guide unit. The present invention can realize automatic installation and is also convenient for manual installation;

[0017] In the present invention, the fulcrum groove is located at the front end of the cylinder, which increases the elastic recovery times of the expansion sleeve and facilitates processing and manufacturing;

[0018] The diameter of the through hole in the present invention is larger than the diameter of the cylinder, so as to adapt to expansion sleeves of different diameters without modifying the size of the shell;

[0019] In the present invention, a gap is left between the bolt head and the rear cover to reduce wear and increase service life; at the same time, a larger force application space is provided for subsequent installation devices;

[0020] The limit pin in the present invention is used to limit the axial movement of the driving column, and at the same time facilitates the subsequent torque application and automatic positioning installation;

[0021] In the present invention, the inner side of the expansion sleeve and the outer side of the guide column are smoothly matched, which can significantly reduce the friction between the two, reduce stress concentration, enhance strength and rigidity, and extend service life;

[0022] In the present invention, a slide groove matched with the connection frame is arranged inside the shell to form a strong sliding support for the connection frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional diagram of a high-efficiency and long-life temporary fastening mechanism of the present invention.

[0025] Figure 2 It is a front view of a temporary fastening mechanism with high efficiency and long service life according to the present invention.

[0026] Figure 3 for Figure 2 Sectional view of AA.

[0027] Figure 4 It is a rear view of a temporary fastening mechanism with high efficiency and long service life according to the present invention.

[0028] Figure 5 The figure is a side view of a temporary fastening mechanism with high efficiency and long service life according to the present invention.

[0029] Figure 6 for Figure 5 Cross-sectional view of BB.

[0030] Figure 7 It is a schematic diagram of the structure of the driving unit, the fastening unit and the guiding unit in the present invention.

[0031] Figure 8 It is a schematic diagram of the structure of the driving column and the guide column in the present invention.

[0032] Fig. 9 It is a schematic diagram of the structure of the limit pin in the present invention.

[0033] Among them, in the figure:

[0034] 1-housing; 11-through hole; 12-slide groove; 2-rear cover; 21-limiting hole; 3-driving column; 31-bolt head; 32-limiting groove; 4-expansion sleeve; 41-cylinder; 411-fulcrum groove; 42-cone body; 421-second through groove; 43-fastening head; 431-first through groove; 5-limiting pin; 6-connecting frame; 7-guide column. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or components is not necessarily limited to those steps or components that are clearly listed, but may include other steps or components that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0038] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0039] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] See attached Figure 1-9 The present invention discloses a high-efficiency and long-life temporary fastening mechanism, comprising a shell 1, a fastening unit and a driving unit. The front end of the fastening unit is used to pre-fix a plurality of thin-walled parts, and the rear end penetrates the front end wall of the shell 1 and extends into the shell 1. The front end of the peripheral wall of the driving unit is connected to the extension end of the fastening unit. The rear end of the driving unit penetrates the rear end wall of the shell 1 and extends outward. A guide unit is fixedly provided on the front end wall of the driving unit, and the front end of the guide unit extends into the interior of the fastening unit.

[0041] The driving unit is used to drive the fastening unit to move along the guiding unit and drive the front end of the fastening unit to open or close.

[0042] In this embodiment, the fastening unit can smoothly pass through the pre-connection hole with a large aspect ratio, with high alignment accuracy, which greatly improves work efficiency. Under the action of the driving unit and the guide unit, the fastening unit can perform reliable fastening operations with a large clamping force, which can realize automated installation and is also convenient for manual installation.

[0043] The fastening unit includes an expansion sleeve 4 and a connecting frame 6. A plurality of through grooves are provided at the front end of the expansion sleeve 4. The expansion sleeve 4 includes a fastening head 43, a truncated cone body 42 and a cylindrical body 41 connected in sequence from front to back. The through grooves include a first through groove 431 provided on the fastening head 43, a second through groove 421 provided on the truncated cone body 42 and a fulcrum groove 411 provided at the front end of the cylindrical body 41. The first through groove 431, the second through groove 421 and the fulcrum groove 411 are connected. A through hole 11 is provided at the center of the front end wall of the shell 1. The rear end of the cylinder 41 extends through the through hole 11 into the shell 1 and is fixedly connected to the connecting frame 6. The connecting frame 6 is connected to the front end of the peripheral wall of the drive unit.

[0044] In this embodiment, the fastening head 43, the truncated cone 42 and the cylindrical body 41 are all made of elastic materials, and the fulcrum groove 411 is located at the front end of the cylindrical body 41, which increases the elastic recovery times of the expansion sleeve 4 and facilitates processing and manufacturing.

[0045] The diameter of the through hole 11 is larger than the diameter of the cylinder 41 , so as to accommodate expansion sleeves 4 of different diameters without modifying the size of the housing 1 .

[0046] The driving unit includes a driving column 3, the rear end of the shell 1 is threadedly connected to the rear cover 2, the front end of the driving column 3 is threadedly connected to the connecting frame 6, the rear end penetrates the rear cover 2 and extends outward and is fixedly connected with a bolt head 31, and the driving column 3 is rotatably connected to the rear cover 2.

[0047] In this embodiment, the bolt head 31 is rotated to realize the rotation of the driving column 3, so that the connecting frame 6 threadedly connected thereto moves backward, driving the expansion sleeve 4 to move backward.

[0048] A gap is left between the bolt head 31 and the rear cover 2 to reduce wear and increase service life; it also provides a larger force application space for subsequent installation devices.

[0049] A high-efficiency and long-life temporary fastening mechanism also includes a limit pin 5. A limit hole 21 adapted to the outer side of the limit pin 5 is provided in the rear cover 2. A limit groove 32 adapted to the inner side of the limit pin 5 is provided on the driving column 3. The limit pin 5 is used to limit the axial movement of the driving column 3, and at the same time facilitates subsequent torque application and automatic positioning installation.

[0050] The guide unit includes a guide column 7, the rear end of which is fixedly arranged at the center position of the front end wall of the driving column 3, and the front end of the guide column 7 passes through the connecting frame 6 and extends into the expansion sleeve 4. The inner side of the expansion sleeve 4 and the outer side of the guide column 7 are smoothly matched, which can significantly reduce the friction between the two, reduce stress concentration, enhance strength and rigidity, and extend the service life.

[0051] A sliding groove 12 adapted to the connection frame 6 is provided inside the housing 1 to provide strong sliding support for the connection frame 6 .

[0052] Working principle:

[0053] When the fastening head 43 is in a closed state, the fastening head 43 is passed through the pre-connection holes of the multiple thin-walled parts to be fastened, and the bolt head 31 is rotated to realize the rotation of the driving column 3, so that the connecting frame 6 threadedly connected thereto moves backward, driving the expansion sleeve 4 to move backward, and the inner side of the expansion sleeve 4 is smoothly matched with the outer side of the guide column 7, so that the fastening head 43 retreats axially and separates radially at the same time, thereby realizing the pre-fixation of multiple thin-walled parts;

[0054] In the above process, the slide groove 12 provides strong sliding support for the outer side of the connecting frame 6, making the entire fastening process more stable.

[0055] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency and long-life temporary fastening mechanism, characterized in that: It comprises a shell (1), a fastening unit and a driving unit, wherein the front end of the fastening unit is used to pre-fix a plurality of thin-walled parts, and the rear end passes through the front end wall of the shell (1) and extends into the interior of the shell (1), the front end of the peripheral wall of the driving unit is connected to the extension end of the fastening unit, the rear end of the driving unit passes through the rear end wall of the shell (1) and extends outward, and a guide unit is fixedly provided on the front end wall of the driving unit, and the front end of the guide unit extends into the interior of the fastening unit; The driving unit is used to drive the fastening unit to move along the guiding unit, and at the same time drive the front end of the fastening unit to open or close.

2. The high-efficiency and long-life temporary fastening mechanism according to claim 1, characterized in that: The fastening unit comprises an expansion sleeve (4) and a connecting frame (6); a plurality of through grooves are provided at the front end of the expansion sleeve (4); the expansion sleeve (4) comprises a fastening head (43), a truncated cone body (42) and a cylindrical body (41) which are connected in sequence from front to back; the through grooves comprise a first through groove (431) arranged on the fastening head (43), a second through groove (421) arranged on the truncated cone body (42) and a fulcrum groove (411) arranged at the front end of the cylindrical body (41); the first through groove (431), the second through groove (421) and the fulcrum groove (411) are connected; a through hole (11) is provided at the center of the front end wall of the shell (1); the rear end of the cylindrical body (41) passes through the through hole (11) and extends into the shell (1) and is fixedly connected to the connecting frame (6); the connecting frame (6) is connected to the front end of the peripheral wall of the drive unit.

3. The high-efficiency and long-life temporary fastening mechanism according to claim 2, characterized in that: The diameter of the through hole (11) is greater than the diameter of the cylinder (41).

4. The high-efficiency and long-life temporary fastening mechanism according to claim 2, characterized in that: The drive unit comprises a drive column (3), the rear end of the housing (1) is threadedly connected to the rear cover (2), the front end of the peripheral wall of the drive column (3) is threadedly connected to the connection frame (6), the rear end passes through the rear cover (2) and protrudes outward and is fixedly connected to a bolt head (31), and the drive column (3) is rotatably connected to the rear cover (2).

5. The high-efficiency and long-life temporary fastening mechanism according to claim 4, characterized in that: A gap is left between the bolt head (31) and the rear cover (2) to reduce wear.

6. The high-efficiency and long-life temporary fastening mechanism according to claim 4, characterized in that: It also includes a limit pin (5), the rear cover (2) is provided with a limit hole (21) adapted to the outer side of the limit pin (5), the drive column (3) is provided with a limit groove (32) adapted to the inner side of the limit pin (5), and the limit pin (5) is used to limit the axial movement of the drive column (3).

7. The high-efficiency and long-life temporary fastening mechanism according to claim 4, characterized in that: The guide unit comprises a guide column (7), the rear end of the guide column (7) being fixedly arranged at the center position of the front end wall of the driving column (3), the front end of the guide column (7) passing through the connecting frame (6) and extending into the interior of the expansion sleeve (4), and the inner side of the expansion sleeve (4) is smoothly matched with the outer side of the guide column (7).

8. The high-efficiency and long-life temporary fastening mechanism according to claim 2, characterized in that: A sliding groove (12) adapted to the connecting frame (6) is provided inside the housing (1).

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