A large-angle self-locking linkage mechanism

Abstract

This utility model discloses a large-angle self-locking linkage mechanism, relating to the field of automotive manufacturing technology. It includes a base plate, a fixed clamping plate, a pressure arm, a clamping cylinder, a connecting arm, and a flipping clamping plate. The lower right corner of the base plate is hinged to the cylinder body of the clamping cylinder via a first rotating shaft. The lower end of the fixed clamping plate is fixedly disposed on the upper right side of the base plate, and the upper end of the fixed clamping plate is hinged to the right end of the pressure arm via a second rotating shaft. The connecting arm has a U-shaped structure with its opening tilted downwards to the left, and the lower left end of the connecting arm is hinged to the fixed clamping plate via a third rotating shaft. One end of the flipping clamping plate is hinged to the pressure arm via a fourth rotating shaft, and the other end of the flipping clamping plate is hinged to the upper left end of the connecting arm via a fifth rotating shaft. The piston rod of the clamping cylinder is hinged to the lower right end of the connecting arm via a sixth rotating shaft.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically a large-angle self-locking linkage mechanism. Background Technology

[0002] The pneumatic self-locking linkage mechanism widely used in welding projects currently suffers from problems such as limited opening angle and large space occupation, making it difficult to adapt to the diverse and complex application scenarios. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a large-angle self-locking linkage mechanism that achieves an opening angle of 162°, approaching a horizontal position, thus greatly improving operating space and flexibility. Its compact design makes it suitable for various clamping scenarios, and it features anti-falling protection, high safety, and space saving.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a large-angle self-locking linkage mechanism, including a base plate, a fixed clamping plate, a pressure arm, a clamping cylinder, a connecting arm, and a flipping clamping plate; the lower right corner of the base plate is hinged to the cylinder body of the clamping cylinder via a first rotating shaft; the lower end of the fixed clamping plate is fixedly disposed on the upper right side of the base plate, and the upper end of the fixed clamping plate is hinged to the right end of the pressure arm via a second rotating shaft; the connecting arm has a U-shaped structure with its opening tilted to the lower left, and the lower left end of the connecting arm is hinged to the fixed clamping plate via a third rotating shaft; one end of the flipping clamping plate is hinged to the pressure arm via a fourth rotating shaft, and the other end of the flipping clamping plate is hinged to the upper left end of the connecting arm via a fifth rotating shaft; the piston rod of the clamping cylinder is hinged to the lower right end of the connecting arm via a sixth rotating shaft.

[0005] A further improvement is that a connecting lug for mounting the first rotating shaft is provided at the lower right corner of the substrate.

[0006] A further improvement is that a boss is provided on the upper left side of the substrate, a first lower limit block is provided on the boss, and a first upper limit block adapted to the first lower limit block is provided at the bottom of the pressure arm.

[0007] A further improvement is that a second lower limit block is provided at the upper middle part of the substrate, an extension is provided at the left end of the connecting arm located below, and a second upper limit block adapted to the second lower limit block is provided at the bottom of the extension.

[0008] A further improvement is that the third rotating shaft is located directly below the second rotating shaft.

[0009] A further improvement is that a first clearance notch adapted to the flipping clamp is provided on the upper left side of the fixed clamp.

[0010] A further improvement is that the right end of the pressure arm is tilted upward to form a raised portion, the second rotating shaft is located at the high end of the raised portion, and the fourth rotating shaft is located at the low end of the raised portion.

[0011] A further improvement is that a pressure block is provided at the left end of the bottom surface of the pressure arm.

[0012] A further improvement is that a second clearance notch adapted to the substrate is provided on the outer side of the connecting arm at a position between the third and sixth rotating shafts.

[0013] A further improvement is that the lower edge of the flipping clamp is provided with an arc-shaped groove.

[0014] The beneficial effects of this utility model are as follows: Currently, pneumatic self-locking linkage mechanisms widely used in welding projects generally suffer from limited opening angles, large space requirements, and poor adaptability. This invention, however, achieves a 162° opening angle, approaching a horizontal position, significantly improving operating space and flexibility. Its compact design makes it suitable for various clamping scenarios, while also providing anti-fall protection, high safety, and space-saving features.

[0015] This invention possesses excellent versatility and scalability, making it suitable for mass production environments and compatible with the self-locking linkage installation requirements of existing welding projects. Furthermore, in pneumatic gripper systems, this mechanism can replace traditional self-locking cylinder units, significantly reducing equipment costs, shortening procurement cycles, and improving production deployment efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of the large-angle self-locking linkage mechanism in an embodiment of this utility model; Figure 2 This is a front view of the large-angle self-locking linkage mechanism in an embodiment of this utility model; Figure 3 This is a side view of the large-angle self-locking linkage mechanism in an embodiment of this utility model; Figure 4 This is a top view of the large-angle self-locking linkage mechanism in an embodiment of this utility model; Figure 5 This is a cross-sectional view of the large-angle self-locking linkage mechanism in an embodiment of this utility model; Figure 6 This is a cross-sectional view of the substrate in an embodiment of the present invention; Figure 7 This is a front view of the fixing clamp in an embodiment of the present utility model; Figure 8 This is a cross-sectional view of the pressure arm in an embodiment of this utility model; Figure 9 This is a cross-sectional view of the connecting arm in an embodiment of the present invention; Figure 10 This is a front view of the flip-up clamp in an embodiment of the present invention.

[0017] Figure label: 1-Substrate; 11-Connecting ear; 12-Boss; 13-First lower limit block; 14-Second lower limit block; 2-Fixed clamping plate; 21-First clearance notch; 3-Pressure arm; 31-Raised part; 32-Pressure block; 33-First upper limit block; 4-Clamping cylinder; 5-Connecting arm; 51-Opening; 52-Second clearance notch; 53-Extension; 54-Second upper limit block; 6- Flip-over clamp; 61- Arc-shaped groove; a-First pivot; b-Second pivot; c-Third pivot; d-Fourth pivot; e-Fifth pivot; f-Sixth pivot. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0019] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0021] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] See Figures 1-5 As shown, this utility model embodiment provides a large-angle self-locking linkage mechanism, including a base plate 1, a fixing clamping plate 2, a pressure arm 3, a clamping cylinder 4, a connecting arm 5, and a flipping clamping plate 6; See Figure 6 As shown, the lower right corner of the substrate 1 is hinged to the cylinder body of the clamping cylinder 4 via a first rotating shaft a; specifically, a connecting lug 11 for mounting the first rotating shaft a is provided at the lower right corner of the substrate 1. A boss 12 is provided on the upper left side of the substrate 1, and a first lower limit block 13 is provided on the boss 12. A first upper limit block 33 adapted to the first lower limit block 13 is provided at the bottom of the pressure arm 3. A second lower limit block 14 is provided in the middle of the upper part of the substrate 1. An extension 53 is provided at the lower left end of the connecting arm 5, and a second upper limit block 54 adapted to the second lower limit block 14 is provided at the bottom of the extension 53.

[0023] See Figure 7 As shown, the lower end of the fixing clamp 2 is fixedly disposed on the upper right side of the base plate 1, and the upper end of the fixing clamp 2 is hinged to the right end of the pressure arm 3 through the second rotating shaft b; specifically, the third rotating shaft c is located directly below the second rotating shaft b. A first clearance notch 21 adapted to the flipping clamp 6 is provided on the upper left side of the fixing clamp 2.

[0024] See Figure 9 As shown, the connecting arm 5 has a U-shaped structure with the opening 51 tilting to the lower left, and the left end of the connecting arm 5 located at the bottom is hinged to the fixed clamping plate 2 through the third rotating shaft c; specifically, the outer side of the connecting arm 5 is provided with a second clearance notch 52 adapted to the base plate 1 at the position between the third rotating shaft c and the sixth rotating shaft f.

[0025] See Figure 10 As shown, one end of the flipping clamp 6 is hinged to the pressure arm 3 via the fourth pivot d, and the other end of the flipping clamp 6 is hinged to the left end of the connecting arm 5 located above via the fifth pivot e; specifically, an arc-shaped groove 61 is provided on the lower edge of the flipping clamp 6.

[0026] The piston rod of the clamping cylinder 4 is hinged to the right end of the connecting arm 5 located below via the sixth pivot f. In this embodiment, the clamping cylinder is model CK1B63-75YAZ, brand: SMC.

[0027] See Figure 8As shown, the right end of the pressure arm 3 is inclined upward to form a raised portion 31, the second rotating shaft b is located at the high end of the raised portion 31, and the fourth rotating shaft d is located at the low end of the raised portion 31. Specifically, a pressure block 32 is provided at the left end of the bottom surface of the pressure arm 3.

[0028] The working principle of this utility model is as follows: When the clamping cylinder is vented and tightened, the connecting arm rotates around the pivot point, causing the flipping clamp and the clamping arm to rotate together. Limited by the two lower limit blocks, after the clamping arm is fully tightened, the three points of rotation on the flipping clamp and the fixed clamp align, forming a self-locking state. When the clamping cylinder is vented and opened, the clamping arm rotates around the clamp axis; this mechanism opens to an angle of 162 degrees, nearly horizontal.

[0029] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A large-angle self-locking linkage mechanism, comprising a base plate (1), characterized in that: It also includes a fixed clamping plate (2), a pressure arm (3), a clamping cylinder (4), a connecting arm (5), and a flipping clamping plate (6); The lower right corner of the substrate (1) is hinged to the cylinder body of the clamping cylinder (4) via the first rotating shaft (a); The lower end of the fixed clamp (2) is fixedly disposed on the upper right side of the base plate (1), and the upper end of the fixed clamp (2) is hinged to the right end of the pressure arm (3) through the second rotating shaft (b). The connecting arm (5) has a U-shaped structure with an opening (51) tilted to the lower left, and the left end of the connecting arm (5) is hinged to the fixed clamp (2) through the third pivot (c). One end of the flipping clamp (6) is hinged to the pressure arm (3) via the fourth pivot (d), and the other end of the flipping clamp (6) is hinged to the left end of the connecting arm (5) located above via the fifth pivot (e). The piston rod of the clamping cylinder (4) is hinged to the right end of the connecting arm (5) located below it via the sixth pivot (f).

2. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: The lower right corner of the substrate (1) is provided with a connecting ear (11) for mounting the first rotating shaft (a).

3. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: A boss (12) is provided on the upper left side of the substrate (1), and a first lower limit block (13) is provided on the boss (12). A first upper limit block (33) is provided at the bottom of the pressure arm (3) to match the first lower limit block (13).

4. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: The upper middle part of the substrate (1) is provided with a second lower limit block (14), and the left end of the connecting arm (5) located below is provided with an extension (53). The bottom of the extension (53) is provided with a second upper limit block (54) that is adapted to the second lower limit block (14).

5. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: The third rotating shaft (c) is located directly below the second rotating shaft (b).

6. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: The upper left side of the fixed clamp (2) is provided with a first clearance notch (21) that is adapted to the flip clamp (6).

7. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: The right end of the pressure arm (3) is tilted upward to form a raised part (31), the second rotating shaft (b) is located at the high end of the raised part (31), and the fourth rotating shaft (d) is located at the low end of the raised part (31).

8. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: A pressure block (32) is provided on the left end of the bottom surface of the pressure arm (3).

9. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: The connecting arm (5) has a second clearance notch (52) on its outer side, located between the third pivot (c) and the sixth pivot (f), which is adapted to the substrate (1).

10. The large-angle self-locking linkage mechanism according to claim 1, characterized in that: The lower edge of the flip-up clamp (6) is provided with an arc-shaped groove (61).

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