Temporary fastener supporting each other

Abstract

The utility model discloses a temporary fastener of mutual support relates to temporary fastening technical field, including shell, fastening unit and drive unit, the front end of fastening unit is used for pre-fixing a plurality of thin-walled piece, and the rear end of fastening unit passes through shell front end wall and extends into shell inner cavity, drive unit front end is connected with fastening unit extension end, and drive unit front end is connected with fastening unit extension end. The rear end penetrates through the rear end wall of the shell and extends outwards, a supporting unit is arranged at the rear end of an inner cavity of the shell and used for supporting the fastening unit, a guiding unit is fixedly arranged at the front end of the supporting unit, and the front end of the guiding 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-connecting hole with a large length-diameter ratio, the alignment precision is high, the working efficiency is greatly improved, reliable fastening operation with large clamping force is implemented under the action of the driving unit and the guide unit, and the stability of the fastening process is greatly improved due to the arrangement of the supporting unit.

Description

Technical Field

[0001] The utility model relates to the technical field of temporary fastening, in particular to a temporary fastener that supports each other. Background Art

[0002] Fasteners are mechanical components used to achieve connections and are widely used in various industries, including aviation, energy, electronics, machinery manufacturing, chemicals, and metallurgy. When joining thin-walled components, such as sheet metal or shell structures, a temporary fastening device is often required for initial fixation. These devices are inserted into pre-recorded holes in multiple thin-walled components to achieve short-term connections and fixation.

[0003] In practice, temporary fastening devices must be designed to ensure sufficient structural strength and stability, while also being convenient and efficient to operate, ensuring they can securely hold thin-walled components in place during the pre-fixing phase. Furthermore, they must be easily removable after subsequent fixation, ensuring smooth removal without disrupting subsequent processing or assembly. Due to their flexibility and efficiency, these devices are essential tools in many industrial scenarios, playing a particularly important role in workplaces where frequent component replacement or adjustment is required.

[0004] However, existing temporary fastening devices face challenges when applied to pre-connection holes with large aspect ratios. For example, positioning and alignment present significant challenges, leading to a lack of stability in the fastening head during movement, thus compromising fastening quality. Furthermore, many existing designs lack sufficient strength and rigidity, resulting in low operational efficiency and a limited service life. These deficiencies make it difficult to provide stable fastening support in long-term applications and fail to provide the necessary initial conditions for subsequent manual or automated riveting processes, ultimately impacting the quality and performance of the laminated structure. Utility Model Content

[0005] In view of this, the present invention provides a mutually supporting temporary fastener to solve the problems raised in the above background technology, and specifically discloses the following contents:

[0006] A mutually supporting temporary fastener, comprising a shell, a fastening unit, and a driving unit, wherein the front end of the fastening unit is used to pre-fix multiple thin-walled parts, and the rear end penetrates the front end wall of the shell and extends into the shell cavity; the front end of the driving unit is connected to the extension end of the fastening unit, and the rear end penetrates the rear end wall of the shell and extends outward; a supporting unit is provided at the rear end of the shell cavity for supporting the fastening unit, and a guide unit is fixedly provided at the front end of the supporting 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 guide unit, and at the same time drive the front end of the fastening unit to open or close.

[0008] Furthermore, the fastening unit includes an expansion sleeve and a front connecting frame, the front end of the expansion sleeve is provided with a plurality of through grooves, the expansion sleeve includes a fastening head, a frustum and a cylinder connected in sequence from front to back, the through groove includes a first through groove arranged on the fastening head, a second through groove arranged on the frustum 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 front connecting frame, and the front connecting frame is connected to the driving unit.

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

[0010] Furthermore, the drive unit includes a drive column, the rear end of the shell is threadedly connected to the rear cover, the front end of the drive column is threadedly connected to the front connecting frame, the rear end passes through the rear cover and extends outward and is fixedly connected to a bolt head, and the drive 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, a limit hole adapted to the outer side of the limit pin is provided in the rear cover, a limit groove adapted to the inner side of the limit pin is provided on the drive column, and the limit pin is used to limit the axial movement of the drive column.

[0013] Furthermore, the support unit includes a rear support frame, the front connecting frame is provided with a front support groove adapted to the rear support frame, the rear support frame is provided with a rear support groove adapted to the front connecting frame, the front end of the rear support frame is slidably connected to the front support groove, and the rear end is fixedly connected to the front end of the rear cover, the rear end of the front connecting frame is slidably connected to the rear support groove, and the front end of the driving column passes through the front connecting frame and is rotatably connected to the inner wall of the front end of the rear support frame.

[0014] 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 rear support frame, the front end of the guide column passes through the front connecting frame and extends into the interior of the expansion sleeve, and the inner side of the expansion sleeve is smoothly matched with the outer side of the guide column.

[0015] Furthermore, a groove adapted to the rear support frame is provided at the rear end of the shell, and a slide groove adapted to the front connection frame is also provided inside the shell, and the slide groove is communicated with the groove.

[0016] The beneficial effects of the present invention are:

[0017] The fastening unit of the utility model can smoothly pass through the pre-connection hole with a large aspect ratio, with high alignment accuracy, which greatly improves the work efficiency. Under the action of the driving unit and the guide unit, reliable fastening operations with large clamping force can be repeatedly implemented. The setting of the support unit greatly improves the stability of the fastening process, which can realize both automatic installation and manual installation.

[0018] The fulcrum groove of the utility model is located at the front end of the cylinder, which increases the elastic recovery times of the expansion sleeve and is also easy to process and manufacture;

[0019] The diameter of the through hole in the utility model is larger than the diameter of the cylinder, which is convenient for adapting to expansion sleeves of different diameters without modifying the shell size;

[0020] In the utility model, a gap is left between the bolt head and the rear cover to reduce wear and increase service life; at the same time, it also provides a larger force application space for subsequent installation devices;

[0021] The limit pin in the utility model is used to limit the axial movement of the drive column, and at the same time facilitates the subsequent torque application and automatic positioning installation;

[0022] In the utility model, the front end of the rear support frame is slidably connected to the front support groove, and the rear end of the front connecting frame is slidably connected to the rear support groove; when the front connecting frame and the rear support frame slide, they can provide rigid support to each other at the same time, thereby achieving stability and reliability of movement;

[0023] The inner side of the expansion sleeve of the utility model is smoothly matched with the outer side of the guide column, which can significantly reduce the friction between the two, reduce stress concentration, enhance strength and rigidity, and extend service life;

[0024] In the utility model, a groove adapted to the rear support frame is provided at the rear end of the shell body, and a sliding groove adapted to the front connecting frame is also provided inside the shell body, forming a strong sliding support for the rear support frame and the front connecting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 This is a three-dimensional diagram of temporary fasteners supporting each other according to the present invention.

[0027] Figure 2This is a front view of a temporary fastener that supports each other according to the present invention.

[0028] Figure 3 for Figure 2 Cross-sectional view of AA in the figure.

[0029] Figure 4 This is a rear view of a temporary fastener that supports each other according to the present invention.

[0030] Figure 5 This is a side view of a temporary fastener that supports each other according to the present invention.

[0031] Figure 6 for Figure 5 Cross-sectional view of the BB.

[0032] Figure 7 It is a structural schematic diagram of the driving unit and the fastening unit in the utility model.

[0033] Figure 8 It is a structural schematic diagram of the driving column in the utility model.

[0034] Figure 9 It is a structural schematic diagram of the limit pin in the utility model.

[0035] Among them, in the figure:

[0036] 1-housing; 11-through hole; 12-groove; 13-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; 421-second through groove; 43-fastening head; 431-first through groove; 5-limiting pin; 6-rear support frame; 61-rear support groove; 7-front connecting frame; 71-front support groove; 8-guide column. DETAILED DESCRIPTION

[0037] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] It should be noted that the terms "first," "second," and the like in the specification and claims of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or components is not necessarily limited to those steps or components clearly listed, but may include other steps or components that are not clearly listed or inherent to these processes, methods, products, or apparatus.

[0039] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0040] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0041] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0042] See attached Figure 1-9 The utility model discloses a mutually supporting temporary fastener, comprising a shell 1, a fastening unit and a driving unit. The front end of the fastening unit is used to pre-fix multiple thin-walled parts, and the rear end penetrates the front end wall of the shell 1 and extends into the inner cavity of the shell 1. The front end of the driving unit is connected to the extension end of the fastening unit, and the rear end penetrates the rear end wall of the shell 1 and extends outward. A supporting unit is provided at the rear end of the inner cavity of the shell 1 for supporting the fastening unit. A guide unit is fixedly provided at the front end of the supporting unit, and the front end of the guide unit extends into the interior of the fastening unit.

[0043] The driving unit is used to drive the fastening unit to move along the guide unit, and at the same time drive the front end of the fastening unit to open or close.

[0044] 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, and repeatedly implements reliable fastening operations with large clamping force under the action of the driving unit and the guide unit. The setting of the support unit greatly improves the stability of the fastening process, which can realize both automated installation and manual installation.

[0045] The fastening unit includes an expansion sleeve 4 and a front connecting frame 7. 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 frustum 42 and a cylinder 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 frustum 42 and a fulcrum groove 411 provided at the front end of the cylinder 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 front connecting frame 7. The front connecting frame 7 is connected to the driving unit.

[0046] In this embodiment, the fastening head 43, the frustum 42 and the cylinder 41 are all made of elastic materials, and the fulcrum groove 411 is located at the front end of the cylinder 41, which increases the elastic recovery times of the expansion sleeve 4 and facilitates processing and manufacturing.

[0047] 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 .

[0048] The drive unit includes a drive column 3. The rear end of the shell 1 is threadedly connected to the rear cover 2. The front end of the drive column 3 is threadedly connected to the front connecting frame 7. The rear end penetrates the rear cover 2 and extends outward and is fixedly connected to the bolt head 31. The drive column 3 is rotatably connected to the rear cover 2.

[0049] In this embodiment, the bolt head 31 is rotated to realize the rotation of the driving column 3, thereby causing the connecting frame 7 threadedly connected thereto to move backward, driving the expansion sleeve 4 to move backward.

[0050] 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.

[0051] A temporary fastener that supports each other also includes a limit pin 5. A limit hole 21 that is adapted to the outer side of the limit pin 5 is provided in the rear cover 2, and a limit groove 32 that is adapted to the inner side of the limit pin 5 is provided on the drive column 3. The limit pin 5 is used to limit the axial movement of the drive column 3, and at the same time facilitates subsequent torque application and automatic positioning installation.

[0052] The support unit includes a rear support frame 6, a front connecting frame 7 is provided with a front support groove 71 adapted to the rear support frame 6, the rear support frame 6 is provided with a rear support groove 61 adapted to the front connecting frame 7, the front end of the rear support frame 6 is slidably connected in the front support groove 71, the rear end is fixedly connected to the front end of the rear cover 2, the rear end of the front connecting frame 7 is slidably connected in the rear support groove 61, and the front end of the driving column 3 passes through the front connecting frame 7 and is rotatably connected to the inner wall of the front end of the rear support frame 6.

[0053] In this embodiment, when the front connecting frame 7 and the rear supporting frame 6 slide, they provide rigid support to each other, thereby achieving stability and reliability of movement.

[0054] The guide unit includes a guide column 8, the rear end of which is fixedly arranged at the center of the front end wall of the rear support frame 6. The front end of the guide column 8 passes through the front connecting frame 7 and extends into the expansion sleeve 4. The inner side of the expansion sleeve 4 and the outer side of the guide column 8 are smoothly matched, which can significantly reduce the friction between the two, reduce stress concentration, enhance strength and rigidity, and extend service life;

[0055] A groove 12 adapted to the rear support frame 6 is provided at the rear end of the shell 1. A slide groove 13 adapted to the front connecting frame 7 is also provided inside the shell 1. The slide groove 13 is connected to the groove 12 to form a strong sliding support for the rear support frame 6 and the front connecting frame 7.

[0056] Working principle:

[0057] When the fastening head 43 is in the 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 rotate the driving column 3, thereby causing the connecting frame 7 threadedly connected to it to move backward, driving the expansion sleeve 4 to move backward. The inner side of the expansion sleeve 4 is smoothly matched with the outer side of the guide column 8, so that the fastening head 43 retreats axially and separates radially, thereby achieving pre-fixation of multiple thin-walled parts;

[0058] During the above process, when the front connecting frame 7 and the rear supporting frame 6 slide, they provide rigid support to each other at the same time to achieve stability and reliability of movement. The slide groove 13 provides strong sliding support for the outer side of the front connecting frame 7, and the groove 12 provides strong support for the outer side of the rear supporting frame 6, making the entire fastening process more stable.

[0059] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A temporary fastener that supports each other, characterized in that: The invention 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 penetrates the front end wall of the shell (1) and extends into the inner cavity of the shell (1); the front end of the driving unit is connected to the extending end of the fastening unit, and the rear end penetrates the rear end wall of the shell (1) and extends outward; a supporting unit is provided at the rear end of the inner cavity of the shell (1) for supporting the fastening unit, and a guide unit is fixedly provided at the front end of the supporting 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 guide unit, and at the same time drive the front end of the fastening unit to open or close.

2. A mutually supporting temporary fastener according to claim 1, characterized in that: The fastening unit comprises an expansion sleeve (4) and a front connecting frame (7); a plurality of through slots are provided at the front end of the expansion sleeve (4); the expansion sleeve (4) comprises a fastening head (43), a truncated cone (42) and a cylindrical body (41) connected in sequence from front to back; the through slots comprise a first through slot (431) provided on the fastening head (43), a second through slot (421) provided on the truncated cone (42) and a fulcrum slot (411) provided at the front end of the cylindrical body (41); the first through slot (431), the second through slot (421) and the fulcrum slot (411) are connected; a through hole (11) is provided at the center of the front end wall of the shell (1); a 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 front connecting frame (7); the front connecting frame (7) is connected to the driving unit.

3. A mutually supporting temporary fastener according to claim 2, characterized in that: The diameter of the through hole (11) is larger than the diameter of the cylinder (41).

4. A mutually supporting temporary fastener 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 drive column (3) is threadedly connected to the front connection frame (7), the rear end passes through the rear cover (2), extends outward and is fixedly connected to a bolt head (31), and the drive column (3) is rotatably connected to the rear cover (2).

5. A mutually supporting temporary fastener 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. A mutually supporting temporary fastener according to claim 4, characterized in that: It 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), and a limit groove (32) adapted to the inner side of the limit pin (5) is provided on the driving column (3), and the limit pin (5) is used to limit the axial movement of the driving column (3).

7. A mutually supporting temporary fastener according to claim 4, characterized in that: The support unit comprises a rear support frame (6), the front connecting frame (7) is provided with a front support groove (71) adapted to the rear support frame (6), the rear support frame (6) is provided with a rear support groove (61) adapted to the front connecting frame (7), the front end of the rear support frame (6) is slidably connected in the front support groove (71), and the rear end is fixedly connected to the front end of the rear cover (2), the rear end of the front connecting frame (7) is slidably connected in the rear support groove (61), and the front end of the driving column (3) passes through the front connecting frame (7) and is rotatably connected to the inner wall of the front end of the rear support frame (6).

8. A mutually supporting temporary fastener according to claim 7, characterized in that: The guide unit comprises a guide column (8), the rear end of which is fixedly arranged at the center position of the front end wall of the rear support frame (6), the front end of which passes through the front connecting frame (7) and extends 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 (8).

9. A mutually supporting temporary fastener according to claim 7, characterized in that: The rear end of the shell (1) is provided with a groove (12) adapted to the rear support frame (6), and the shell (1) is also provided with a slide groove (13) adapted to the front connection frame (7), and the slide groove (13) is connected to the groove (12).

Images