A tensioner for automatic positioning and fastening of automotive workpieces

Abstract

This utility model relates to the field of automotive parts manufacturing technology, and provides a tensioning device for automatic positioning and fastening of automotive workpieces. It includes a workpiece body, a mounting hole, a cylinder, a housing, an ejector groove, a push rod, a push block, a slide groove, a slider, and an expansion pin. The cylinder is mounted on the workpiece body, and its output end is connected to the push rod. The push rod is connected to the push block, which is located inside the housing. In use, the cylinder drives the push rod to move axially, pushing the push block downwards into the inclined slide groove inside the housing. The push block contacts the slider and pushes it to slide along the slide groove. Due to the inclination of the slide groove, the slider's sliding path has axial and radial components. The slider gradually extends to the ejector groove and abuts against the expansion pin, pushing it outwards. This causes the expansion pin to expand radially outwards and press against the inner wall of the mounting hole, achieving stable positioning of the workpiece.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts manufacturing technology, and in particular relates to a tensioning device for automatic positioning and fastening of automotive workpieces. Background Technology

[0002] In the manufacturing and assembly of automotive parts, rapid positioning and fastening of workpieces are key steps to improve work efficiency and assembly accuracy. Traditional fastening devices mostly rely on manual operation or the use of bolts and pins for fixing, which is cumbersome, inefficient, and carries the risk of inaccurate positioning or loosening. Especially in applications requiring rapid replacement or high-frequency assembly, traditional methods are difficult to meet the requirements of automation and high-precision positioning. Utility Model Content

[0003] This utility model provides a tensioning device for automatic positioning and fastening of automotive workpieces. It aims to solve the problem that traditional fastening devices rely on manual operation or use bolts and pins for fixing, which is cumbersome, inefficient, and has the risk of inaccurate positioning or loosening. Especially in application scenarios that require rapid replacement or high-frequency assembly, traditional methods are difficult to meet the requirements of automation and high-precision positioning.

[0004] This utility model is implemented as follows: a tensioning device for automatic positioning and fastening of automotive workpieces includes: a workpiece body, a mounting hole, a cylinder, a housing, an ejector groove, a push rod, a push block, a slide groove, a slider, and an expansion pin. The cylinder is mounted on the workpiece body, and the output end of the cylinder is connected to the push rod. The push rod is connected to the push block, which is located inside the housing. The push block can slide within the slide groove, which is inclined. A slider is provided within the slide groove, and the slider abuts against the expansion pin. The ejector groove corresponds to the position of the slider, and the expansion pin can be inserted into the mounting hole.

[0005] Preferably, the push block has multiple independent sliding grooves inside, and each sliding groove is provided with a corresponding slider and expansion pin, with the multiple expansion pins arranged in a circumferential distribution.

[0006] Preferably, the push block has a conical structure, and when the push block moves along the axial direction of the push rod, it simultaneously contacts multiple sliders and generates a radial component force.

[0007] Preferably, the slider has a guide surface that fits against the inner wall of the groove, and the slider slides along the direction of the groove.

[0008] Preferably, the outer wall of the expansion pin has a multi-segment conical surface structure, and the expansion pin has a radial expansion portion in the middle, which forms a clearance fit with the mounting hole.

[0009] Preferably, the cylinder is an electrically controlled cylinder that can receive control signals to perform actions. The cylinder achieves linear movement of the push block by controlling the extension and retraction of the push rod.

[0010] Preferably, the ejection grooves are distributed in a ring and are disposed on the side wall or end of the housing. The ejection grooves are connected to the slide grooves to form an exit area for the movement of the slider.

[0011] Compared with related technologies, the tensioning device for automatic positioning and fastening of automotive workpieces provided by this utility model has the following advantages:

[0012] In this invention, during use, the cylinder drives the push rod to move axially, and the push rod pushes the connected push block downward into the inclined slide groove inside the housing. The push block contacts the slider and pushes the slider to slide along the slide groove. Due to the inclination of the slide groove, the sliding path of the slider has axial and radial components. The slider is gradually pushed out to the push-out groove and abuts against the expansion pin, pushing the expansion pin to bulge outward. The expansion pin expands radially outward and presses against the inner wall of the mounting hole, thereby achieving stable positioning of the workpiece. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the cylinder of this utility model;

[0015] Figure 3 This is a three-dimensional cross-sectional structural diagram of the casing of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the present invention, showing the separation of the slide groove and the slider;

[0017] Reference numerals in the attached drawings: 1. Workpiece body; 2. Mounting hole; 3. Cylinder; 4. Sleeve; 5. Ejection groove; 6. Push rod; 7. Push block; 8. Slide groove; 9. Slider; 10. Expansion pin. Detailed Implementation

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] This utility model embodiment provides a tensioning device for automatic positioning and fastening of automotive workpieces, such as... Figure 1-4 As shown, it includes: workpiece body 1, mounting hole 2, cylinder 3, sleeve 4, ejection groove 5, push rod 6, push block 7, slide groove 8, slider 9 and expansion pin 10. Cylinder 3 is set on workpiece body 1. The output end of cylinder 3 is connected to push rod 6. Push rod 6 is connected to push block 7. Push block 7 is set in sleeve 4. Push block 7 can slide in slide groove 8. Slide groove 8 is inclined. Slider 9 is set in slide groove 8. Slider 9 has a guide surface and fits against the inner wall of slide groove 8. The two cooperate to make slider 9 receive uniform force during sliding, effectively avoid shaking or jamming, ensure smooth and reliable sliding path, and improve the stability of mechanism response.

[0021] The slider 9 abuts against the expansion pin 10, the push-out groove 5 corresponds to the position of the slider 9, and the expansion pin 10 can be inserted into the mounting hole 2.

[0022] In a further preferred embodiment of this utility model, the push block 7 is provided with multiple independent sliding grooves 8 inside, and each sliding groove 8 is provided with a corresponding slider 9 and expansion pin 10. The multiple expansion pins 10 are arranged in a circumferential distribution. The push block 7 has a conical structure. When the push block 7 moves axially along the top rod 6, it contacts multiple sliders 9 simultaneously and generates radial force. The slider 9 has a guide surface and fits against the inner wall of the sliding groove 8. The slider 9 slides along the direction of the sliding groove 8. The outer wall of the expansion pin 10 has a multi-segment conical structure. The expansion pin 10 has a radial expansion part in the middle, which forms a clearance fit with the mounting hole 2. The cylinder 3 is an electrically controlled cylinder 3, which can receive control signals to execute actions. The cylinder 3 controls the extension and retraction of the top rod 6 to realize the linear movement of the push block 7. The ejection groove 5 is distributed in a ring and is provided on the side wall or end of the housing 4. The ejection groove 5 is connected to the sliding groove 8 to form the exit area for the movement of the slider 9.

[0023] In this embodiment, the front end of the slider 9 directly abuts against the expansion pin 10. As the slider 9 moves along the inclined groove 8, it pushes the expansion pin 10 to expand outward. The two work together to ensure accurate transmission of the pushing force, avoid empty stroke, and improve the expansion response speed. The pushing block 7 has a conical structure, which can contact multiple sliders 9 simultaneously when moving axially. The radial force is transmitted to each slider 9 through the oblique push of the conical surface, so that each slider 9 moves synchronously, which is conducive to achieving a symmetrical and balanced expansion effect.

[0024] In summary, during use, the cylinder 3 drives the push rod 6 to move axially, and the push rod 6 pushes the connected push block 7 downward into the inclined slide groove 8 inside the sleeve 4. The push block 7 contacts the slider 9 and pushes the slider 9 to slide along the slide groove 8. Since the slide groove 8 is inclined, the sliding path of the slider 9 has axial and radial components. The slider 9 is gradually pushed out to the push-out groove 5 and abuts against the expansion pin 10, pushing the expansion pin 10 to bulge outward, so that the expansion pin 10 expands radially outward and presses against the inner wall of the mounting hole 2, thereby achieving stable positioning of the workpiece.

[0025] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0026] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A tensioning device for automatic positioning and fastening of automotive workpieces, characterized in that, include: The workpiece body (1), mounting hole (2), cylinder (3), sleeve (4), ejector groove (5), push rod (6), push block (7), slide groove (8), slider (9) and expansion pin (10) are provided. The cylinder (3) is set on the workpiece body (1). The output end of the cylinder (3) is connected to the push rod (6). The push rod (6) is connected to the push block (7). The push block (7) is set in the sleeve (4). The push block (7) can slide in the slide groove (8). The slide groove (8) is inclined. The slide groove (8) is provided with a slider (9). The slider (9) abuts against the expansion pin (10). The ejector groove (5) corresponds to the position of the slider (9). The expansion pin (10) can be inserted into the mounting hole (2).

2. The tensioning device for automatic positioning and fastening of automotive workpieces as described in claim 1, characterized in that, The push block (7) has multiple independent sliding grooves (8) inside. Each sliding groove (8) is provided with a corresponding slider (9) and expansion pin (10). The multiple expansion pins (10) are arranged in a circumferential distribution.

3. The tensioning device for automatic positioning and fastening of automotive workpieces as described in claim 1, characterized in that, The push block (7) has a conical structure. When the push block (7) moves axially along the top rod (6), it simultaneously contacts multiple sliders (9) and generates radial force.

4. The tensioning device for automatic positioning and fastening of automotive workpieces as described in claim 1, characterized in that, The slider (9) has a guide surface and is in contact with the inner wall of the groove (8). The slider (9) slides along the direction of the groove (8).

5. A tensioning device for automatic positioning and fastening of automotive workpieces as described in claim 4, characterized in that, The outer wall of the expansion pin (10) is a multi-segment conical structure, and the expansion pin (10) has a radial expansion part in the middle, which forms a clearance fit with the mounting hole (2).

6. A tensioning device for automatic positioning and fastening of automotive workpieces as described in claim 1, characterized in that, The cylinder (3) is an electronically controlled cylinder (3) that can receive control signals to perform actions. The cylinder (3) controls the extension and retraction of the push rod (6) to achieve the linear movement of the push block (7).

7. A tensioning device for automatic positioning and fastening of automotive workpieces as described in claim 1, characterized in that, The ejection groove (5) is distributed in a ring and is set on the side wall or end of the housing (4). The ejection groove (5) is connected to the slide groove (8) to form the exit area for the movement of the slider (9).

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