Self-positioning locking mechanism

Abstract

The utility model provides a self-positioning locking mechanism, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The self-positioning locking mechanism comprises a positioning cylinder, a spring, a tensioning pin and a ball, the positioning cylinder is cylindrical, a through positioning hole is formed in the side portion of the positioning cylinder, the upper end of the tensioning pin is sleeved with the positioning cylinder, and the ball is located between the tensioning pin and the positioning cylinder. The tensioning pin is sleeved with the spring and tends to move downwards under the elastic force effect of the spring, a pushing structure is arranged on the upper portion of the tensioning pin, and when the tensioning pin moves downwards, the pushing structure enables the ball to partially stretch out of the positioning cylinder from the positioning hole. The self-positioning locking mechanism is high in stability.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a self-positioning locking mechanism. Background Technology

[0002] A fixing and clamping device is a device used to fix and position workpieces during manufacturing, ensuring that the workpiece remains stable throughout the machining, assembly, or inspection process. It is crucial for ensuring product quality, improving production efficiency, and guaranteeing operational safety.

[0003] Clamping fixtures securely fix workpieces in a designated position by applying a certain force to prevent them from moving or vibrating.

[0004] It can accurately determine the spatial position of the workpiece, ensuring consistency in each processing step. At the same time, it can provide sufficient clamping force to prevent the workpiece from shifting or deforming under force.

[0005] It provides additional support to the workpiece, disperses stress during processing, and protects the surface quality of the workpiece.

[0006] The clamping fixture has the following characteristics:

[0007] High repeatability: It can maintain the same positioning accuracy in multiple clamping operations, making it suitable for mass production and automated production lines.

[0008] Highly adaptable: It can be adjusted according to workpieces of different shapes and sizes to meet diverse needs.

[0009] Easy to operate: The user-friendly design facilitates quick loading and unloading of workpieces, reducing auxiliary time.

[0010] However, the existing fixtures are too complex in structure and the operation during workpiece positioning is cumbersome, resulting in poor stability. Summary of the Invention

[0011] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a self-positioning locking mechanism that offers high stability and rapid locking.

[0012] The objective of this utility model can be achieved through the following technical solutions:

[0013] A self-positioning locking mechanism is characterized by comprising a positioning cylinder, a spring, a tensioning pin, and a ball. The positioning cylinder is cylindrical and has a through positioning hole on its side. The positioning cylinder is sleeved on the upper end of the tensioning pin, and the ball is located between the tensioning pin and the positioning cylinder. The spring is sleeved on the tensioning pin, and the tensioning pin tends to move downward under the elastic force of the spring. The upper part of the tensioning pin has a pushing structure, which allows the ball to partially extend out of the positioning cylinder from the positioning hole when the tensioning pin moves downward.

[0014] In the self-positioning locking mechanism described above, the lower part of the positioning cylinder has a protruding, block-shaped positioning block.

[0015] In the self-positioning locking mechanism described above, the pushing structure includes a positioning groove with an annular recess on the side of the tension pin, and the ball is embedded in the positioning groove.

[0016] In the self-positioning locking mechanism described above, the two sides of the positioning groove have a smoothly transitioned inlet portion one and an inlet portion two, respectively.

[0017] In the self-positioning locking mechanism described above, the inlet part is a chamfer or rounded corner on the side of the positioning groove.

[0018] In the self-positioning locking mechanism described above, the second inlet is a chamfer or rounded corner on the side of the positioning groove.

[0019] In the self-positioning locking mechanism described above, there are several positioning holes, which are evenly distributed circumferentially on the positioning cylinder, and the balls are set in a one-to-one correspondence with the positioning holes.

[0020] In the self-positioning locking mechanism described above, the upper end of the tensioning pin has an annular recessed connecting groove, and a flexible rubber ring is connected to the connecting groove. The rubber ring is pressed tightly between the tensioning pin and the positioning cylinder.

[0021] In the self-positioning locking mechanism described above, the lower end of the tensioning pin has a protruding retaining edge, which can abut against the lower end of the positioning cylinder.

[0022] In the self-positioning locking mechanism described above, the retaining edge and the tensioning pin are an integral structure.

[0023] With the rapid development of the machining industry, CNC machine tools have also risen rapidly, and more and more metal structures of 3C digital products are being processed using CNC machining.

[0024] Compared with existing technologies, this self-positioning locking mechanism can be used for positioning and locking of jigs and directly for positioning and locking of products. The mechanism has a compact structure, occupies little space, has high positioning accuracy, is easy to pick up and put down, and can be disassembled and reused. Attached Figure Description

[0025] Figure 1 This is an exploded view of the self-positioning locking mechanism.

[0026] Figure 2 This is a three-dimensional structural diagram of the self-positioning locking mechanism.

[0027] Figure 3 This is a cross-sectional structural diagram of the self-positioning locking mechanism.

[0028] In the figure, 1 is the positioning cylinder; 1a is the positioning hole; 1b is the positioning block; 2 is the spring; 3 is the tension pin; 3a is the positioning groove; 3a1 is the first inlet part; 3a2 is the second inlet part; 3b is the connecting groove; 3c is the retaining edge; 4 is the ball; 5 is the rubber ring; 6 is the ring-shaped workpiece; 6a is the inclined surface. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that when a component is said to be "mounted on" another component, it can be directly mounted on the other component or may be interspersed with a component. When a component is said to be "set on" another component, it can be directly set on the other component or may be interspersed with a component. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or may be interspersed with a component.

[0031] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] like Figure 1 and Figure 2 and Figure 3As shown, this self-positioning locking mechanism includes a positioning cylinder 1, a spring 2, a tensioning pin 3, and a ball 4. The positioning cylinder 1 is cylindrical and has a through positioning hole 1a on its side. The positioning cylinder 1 is sleeved on the upper end of the tensioning pin 3, and the ball 4 is located between the tensioning pin 3 and the positioning cylinder 1. The spring 2 is sleeved on the tensioning pin 3, and the tensioning pin 3 tends to move downward under the elastic force of the spring 2. The upper part of the tensioning pin 3 has a pushing structure. When the tensioning pin 3 moves downward, the pushing structure can cause the ball 4 to partially extend out of the positioning cylinder 1.

[0033] The lower part of the positioning cylinder 1 has a protruding, block-shaped positioning block 1b.

[0034] The pushing structure includes a positioning groove 3a with an annular recess on the side of the tension pin 3, and the aforementioned ball 4 is embedded in the positioning groove 3a.

[0035] The positioning groove 3a has a smoothly transitioned inlet portion 3a1 and an inlet portion 3a2 on both sides.

[0036] The inlet section 3a1 is a chamfer or rounded corner on the side of the positioning groove 3a.

[0037] The inlet part 3a2 is a chamfer or rounded corner on the side of the positioning groove 3a.

[0038] This self-positioning locking mechanism is used to position annular workpiece 6, especially annular workpiece 6 with an inclined inner surface 6a.

[0039] Specifically, in the initial state, the inner side of the bead 4 is located in the positioning groove 3a, and the outer side of the bead 4 abuts against the inner side of the positioning cylinder 1. The annular workpiece 6 can smoothly fit onto the positioning cylinder 1. Then, an external force is applied to move the tension pin 3 downward, and the bead 4 smoothly disengages from the positioning groove 3a through the guide part 3a1. The bead 4 is squeezed by the outer side of the tension pin 3, and part of the bead 4 extends out of the positioning hole 1a. The bead 4 extending out of the positioning hole 1a is stuck at the inclined surface 6a of the annular workpiece 6. At this time, the annular workpiece 6 is pressed tightly between the bead 4 and the positioning block 1b, thus locking the annular workpiece.

[0040] Conversely, after pushing the tension pin 3 upward, the ball 4 falls back to the positioning groove 3a. At this time, the annular workpiece 6 is no longer positioned, and the annular workpiece 6 can be smoothly removed from this mechanism.

[0041] It can be seen that, under the action of the first inlet 3a1 and the second inlet 3a2, the ball 4 can smoothly enter the positioning groove 3a or fall out of the positioning groove 3a.

[0042] The number of positioning holes 1a is several, and the positioning holes 1a are evenly distributed circumferentially on the positioning cylinder 1. The ball 4 is set in a one-to-one correspondence with the positioning hole 1a.

[0043] Multiple round beads 4 and corresponding positioning holes 1a can effectively improve locking stability.

[0044] The upper end of the tensioning pin 3 has an annular recessed connecting groove 3b, and a flexible rubber ring 5 is connected to the connecting groove 3b. The rubber ring 5 is pressed tightly between the tensioning pin 3 and the positioning cylinder 1.

[0045] The rubber ring 5 can be stably positioned and connected to the tension pin 3 through the connecting groove 3b.

[0046] The lower end of the tensioning pin 3 has a protruding retaining edge 3c, which can abut against the lower end of the positioning cylinder 1.

[0047] After the stop 3c abuts against the lower end of the positioning cylinder 1, the tension pin 3 can no longer move, thus preventing the tension pin 3 from separating from the positioning cylinder 1.

[0048] The retaining edge 3c and the tensioning pin 3 are an integral structure.

[0049] This can appropriately improve the structural compactness of the entire mechanism.

[0050] With the rapid development of the machining industry, CNC machine tools have also risen rapidly, and more and more metal structures of 3C digital products are being processed using CNC machining.

[0051] This self-positioning locking mechanism can be used for positioning and locking of jigs and fixtures, as well as for positioning and locking of products. The mechanism has a compact structure, occupies little space, has high positioning accuracy, is easy to pick up and put down, and can be disassembled and reused.

[0052] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A self-locating locking mechanism, characterized in that, The application relates to a positioning cylinder (1), a spring (2), a tension pin (3) and a ball (4), wherein the positioning cylinder (1) is in a cylindrical shape and has a positioning hole (1a) penetrating through the side portion, the positioning cylinder (1) is sleeved on the upper end of the tension pin (3), the ball (4) is located between the tension pin (3) and the positioning cylinder (1), the spring (2) is sleeved on the tension pin (3), the tension pin (3) has a downward moving tendency under the elastic force of the spring (2), the upper portion of the tension pin (3) has a pushing structure, and the pushing structure can make the ball (4) partially extend out of the positioning cylinder (1) from the positioning hole (1a) when the tension pin (3) moves downward.

2. The self-positioning locking mechanism of claim 1, wherein, The lower side portion of the positioning cylinder (1) is provided with a protruding block-shaped positioning block (1b).

3. The self-positioning locking mechanism of claim 2, wherein, The pushing structure comprises a positioning groove (3a) annularly recessed on the side portion of the tension pin (3), and the ball (4) is embedded in the positioning groove (3a).

4. The self-positioning locking mechanism of claim 3, wherein, The two sides of the positioning groove (3a) are respectively provided with a smooth transition lead-in part one (3a1) and a lead-in part two (3a2).

5. The self-positioning locking mechanism of claim 4, wherein, The lead-in part one (3a1) is a chamfer or a round corner on the side of the positioning groove (3a).

6. The self-positioning locking mechanism of claim 5, wherein, The lead-in part two (3a2) is a chamfer or a round corner on the side of the positioning groove (3a).

7. The self-positioning locking mechanism of claim 6, wherein, The positioning hole (1a) is provided with a plurality of positioning holes (1a) which are circumferentially distributed on the positioning cylinder (1), and the ball (4) is arranged in one-to-one correspondence with the positioning hole (1a).

8. The self-positioning locking mechanism of claim 7, wherein, The upper end of the tension pin (3) is provided with an annularly recessed connecting groove (3b), the connecting groove (3b) is connected with a flexible rubber ring (5), and the rubber ring (5) is tightly pressed between the tension pin (3) and the positioning cylinder (1).

9. The self-positioning locking mechanism of claim 8, wherein, The lower end of the tension pin (3) is provided with a protruding stop edge (3c) which can abut against the lower end of the positioning cylinder (1).

10. The self-positioning locking mechanism of claim 9, wherein, The stop edge (3c) and the tension pin (3) are in an integral structure.

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