Elastic self-tightening jig lever

Abstract

The utility model relates to the field of processing fixture, concretely relates to a kind of elastic self-tightening fixture rod, including positioning column and multiple clamping components, positioning column is equipped with multiple through holes, through hole is through positioning column radially, every two clamping components are respectively clamped in the two ends of through hole;Every clamping component includes groove, elastic member and locating bead, the opening of groove is towards the side of positioning column, elastic member and locating bead are all placed in groove, one end of elastic member is connected with the inner wall of groove, the other end of elastic member is connected with locating bead, groove is clamped in the corresponding through hole end portion, the side of locating bead protrudes out the side of positioning column via the opening of groove.The clamping component is set, elastic member is compressed after pushing locating bead always close to fixture inner wall, and multiple sets of clamping components exert radial pressure on fixture from different directions, form self-tightening effect, make fixture firmly fixed on positioning column, prevent fixture from turning, and the spherical surface of locating bead contacts fixture inner wall, can reduce fixture abrasion.

Description

Technical Field

[0001] This utility model relates to the field of machining fixtures, specifically to an elastic self-expanding jig rod. Background Technology

[0002] In fields such as machining, automated assembly, and precision testing, jig rods are key components connecting equipment to workpieces to be processed and inspected, and their performance directly affects production efficiency and machining accuracy. Currently, the optical axis jig rods and aircraft nose jig rods, which are widely used in the industry, have simple structures and low costs, but they have significant shortcomings in practical applications and cannot meet the demands of high-precision and high-safety production.

[0003] Because the optical axis jig rod has a smooth surface and no positioning structure, it can only be initially fixed by friction after the fixture is inserted. This fixing method has obvious shortcomings: when the equipment vibrates or the workpiece is subjected to radial torque, the fixture is prone to circumferential rotation around the optical axis (i.e., "spinning"), which causes the workpiece positioning to deviate. This not only affects the machining accuracy but may also cause safety hazards such as collisions and interference.

[0004] Another common type of aircraft nose jig rod (also known as "petal-type jig rod") achieves fastening through radially distributed elastic blades at the head. Although its structure can limit the circumferential rotation of the jig to a certain extent, it has three major problems: First, the blades are rigid or semi-rigid structures, which are prone to breakage due to fatigue or impact after long-term use, especially in high-frequency loading and unloading scenarios, resulting in high maintenance and replacement costs; Second, the blade edges are usually designed to be sharp to ensure clamping force, which can easily scratch operators when loading and unloading the jig, posing a safety risk; Third, the blades are in line contact with the inner wall of the jig, and the blade edges will continuously rub against the inner wall of the jig during the clamping process, leading to accelerated wear of the inner wall and shortening the service life of the jig.

[0005] Therefore, there is an urgent need to provide a jig rod structure that can effectively prevent the jig from spinning, avoid component damage and safety hazards, and reduce jig wear. Summary of the Invention

[0006] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an elastic self-expanding clamp rod. By setting clamping components, the elastic element is compressed and pushes the positioning bead to always stick to the inner wall of the clamp. Moreover, multiple sets of clamping components apply radial pressure to the clamp from different directions to form a self-expanding effect, so that the clamp is firmly fixed on the positioning post and is not easy to loosen. It can effectively prevent the clamp from rotating. At the same time, the spherical contact of the positioning bead with the inner wall of the clamp can reduce the wear of the clamp.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An elastic self-expanding clamping fixture rod includes a positioning post and multiple clamping assemblies. The positioning post has multiple through holes that radially penetrate the positioning post. Each pair of clamping assemblies is respectively engaged at both ends of the through holes. Each clamping assembly includes a groove, an elastic element, and a positioning bead. The opening of the groove faces the side of the positioning post. The elastic element and the positioning bead are both placed inside the groove. One end of the elastic element is connected to the inner wall of the groove, and the other end of the elastic element is connected to the positioning bead. The groove is engaged within the end of the corresponding through hole, and the side of the positioning bead protrudes from the side of the positioning post through the opening of the groove.

[0009] Furthermore, both the upper and lower parts of the positioning bead abut against the inner wall of the groove.

[0010] Furthermore, the top of the positioning post is provided with a conical head.

[0011] Furthermore, the lower end of the positioning post is provided with a snap-fit ​​post and a support post in sequence. The radial distance of the positioning post is less than the radial distance of the snap-fit ​​post, and the radial distance of the snap-fit ​​post is less than the radial distance of the support post. The side of the positioning bead protrudes from the side of the snap-fit ​​post through the opening of the groove.

[0012] Furthermore, a fixing block extends from the end of the groove towards the periphery of the opening, and the inner wall of the fixing block abuts against the positioning post.

[0013] Furthermore, the multiple through holes are spaced apart from top to bottom.

[0014] Furthermore, the axis of the through hole is perpendicular to the axis of the adjacent through hole.

[0015] Furthermore, the positioning post has a rectangular cross-section, one end of the through hole penetrates the side of the positioning post, and the other end of the through hole penetrates the other side of the positioning post.

[0016] Furthermore, the lower end of the support column is provided with a mounting base.

[0017] Furthermore, the mounting base is provided with a resilient pin.

[0018] The beneficial effects of this utility model are as follows: The elastic self-expanding clamping fixture rod of this utility model has a simple structure and is easy to use. In use, the product clamp is inserted into the positioning post of the elastic self-expanding clamping fixture rod. At this time, the side of the positioning bead protruding from the side of the positioning post contacts the inner wall of the product clamp. The inner wall of the clamp generates a radially inward squeezing force on the positioning bead, forcing the positioning bead to slide into the groove. Simultaneously, it compresses the elastic element connecting the positioning bead. The compressed elastic element pushes the positioning bead to always keep it pressed tightly against the inner wall of the clamp. Moreover, multiple clamping components apply radial pressure to the clamp from different directions, forming a self-expanding effect, making the clamp firmly fixed on the positioning post, not easy to loosen, and effectively preventing the clamp from rotating. At the same time, the spherical contact of the positioning bead with the inner wall of the clamp reduces clamp wear. Furthermore, the assembly and disassembly of the clamping components and through holes can be completed without additional tools, making it easy to process and assemble. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an elastic self-expanding clamping fixture rod.

[0020] Figure 2 This is a partial cross-sectional view of the elastic self-expanding clamping rod.

[0021] Figure 3 for Figure 2 Enlarged view of A.

[0022] Figure 4 This is a partial sectional view of the elastic self-expanding jig rod during assembly with the product jig.

[0023] Figure 5 for Figure 4 Enlarged view of B.

[0024] The reference numerals in the figures include:

[0025] 1. Positioning pin; 11. Through hole; 2. Conical head; 3. Snap-fit ​​pin; 4. Support pin; 5. Mounting base; 6. Elastic pin; 7. Groove; 71. Fixing block; 8. Elastic element; 9. Positioning bead; 10. Product clamp. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0027] like Figure 1-5As shown, an elastic self-expanding clamping fixture rod includes a positioning post 1 and multiple clamping assemblies. The positioning post 1 has multiple through holes 11, which radially penetrate the positioning post 1. Each pair of clamping assemblies is respectively engaged at both ends of the through hole 11. Each clamping assembly includes a groove 7, an elastic element 8, and a positioning bead 9. The opening of the groove 7 faces the side of the positioning post 1. The elastic element 8 and the positioning bead 9 are both placed inside the groove 7. One end of the elastic element 8 is connected to the inner wall of the groove 7, and the other end of the elastic element 8 is connected to the positioning bead 9. The groove 7 is engaged in the end of the corresponding through hole 11, and the side of the positioning bead 9 protrudes from the side of the positioning post 1 through the opening of the groove 7.

[0028] This utility model's elastic self-expanding clamping rod has a simple structure and is easy to use. In use, the product clamp 10 is inserted into the positioning post 1 of the elastic self-expanding clamping rod. At this time, the side of the positioning bead 9 protruding from the side of the positioning post 1 contacts the inner wall of the product clamp 10. The inner wall of the clamp generates a radially inward squeezing force on the positioning bead 9, forcing the positioning bead 9 to slide into the groove 7. Simultaneously, it compresses the elastic element 8 connecting the positioning bead 9. The elastic element 8, after being compressed, stores elastic potential energy and generates an outward elastic restoring force, pushing the positioning bead 9 to always remain tightly against the inner wall of the clamp. Furthermore, this utility model has multiple sets of clamping components. These multiple sets of clamping components apply radial pressure to the clamp from different directions, forming a self-expanding effect, making the clamp firmly fixed on the positioning post 1, not easily loosening, effectively preventing the clamp from rotating. Moreover, the spherical contact of the positioning bead 9 with the inner wall of the clamp reduces clamp wear. Meanwhile, the through hole 11 radially penetrates the positioning post 1, and the two grooves 7 are respectively engaged at both ends of the through hole 11. The assembly and disassembly of the clamping assembly and the through hole 11 can be completed without additional tools, making it easy to process and assemble.

[0029] In this embodiment, the elastic element 8 is a spring.

[0030] Furthermore, the upper and lower parts of the positioning bead 9 abut against the inner wall of the groove 7, so that the positioning bead 9 needs to overcome a certain friction force during the process of sliding outward along the inner wall of the groove 7, so as to prevent the positioning bead 9 from easily detaching from the groove 7 when the product clamp 10 detaches from the positioning post 1.

[0031] Furthermore, the top of the positioning post 1 is provided with a conical head 2, which enables the positioning post 1 to have a guiding function and can be quickly inserted into the product fixture 10.

[0032] Furthermore, the lower end of the positioning post 1 is provided with a snap-fit ​​post 3 and a support post 4 in sequence. The radial distance of the positioning post 1 is less than the radial distance of the snap-fit ​​post 3, and the radial distance of the snap-fit ​​post 3 is less than the radial distance of the support post 4. The side of the positioning bead 9 protrudes from the side of the snap-fit ​​post 3 through the opening of the groove 7. The radial distance of the locking post 3 matches the inner diameter of the product clamp 10. When the elastic self-expanding jig rod is inserted into the product clamp 10, the outer wall of the locking post 3 abuts against the inner wall of the product clamp 10, further strengthening the clamp's stable fixation on the jig rod and preventing the clamp from rotating. The radial distance of the positioning post 1 is smaller than the radial distance of the locking post 3, that is, the bottom diameter of the conical head 2 is smaller than the inner diameter of the product clamp 10, which facilitates the quick insertion of the positioning post 1 into the product clamp 10. The radial distance of the locking post 3 is smaller than the radial distance of the support post 4, that is, the outer periphery of the support post 4 protrudes from the side of the locking post 3, so that when the positioning post 1 and the locking post 3 are inserted into the product clamp 10, the upper end face of the support post 4 abuts against the lower end face of the product clamp 10, which can provide good support for the product clamp 10. Meanwhile, the side of the positioning bead 9 protrudes from the opening of the groove 7 onto the side of the locking post 3, so that the elastic member 8 can push the positioning bead 9 to always be close to the inner wall of the clamp, so that the clamp is firmly fixed on the positioning post 1 and the wear of the clamp is reduced.

[0033] Furthermore, a fixing block 71 extends from the end of the groove 7 to the periphery of the opening. The inner wall of the fixing block 71 abuts against the positioning post 1. This arrangement facilitates the removal of the clamping assembly from the positioning post 1 by taking the fixing block 71 of the groove 7, making disassembly convenient.

[0034] Furthermore, multiple through holes 11 are spaced apart from top to bottom, and each pair of clamping components is respectively engaged with the two ends of the through hole 11, so that multiple sets of clamping components apply radial pressure to the fixture from top to bottom, forming a self-expanding tightening effect of the positioning post 1 as a whole, so that the fixture is firmly fixed on the positioning post 1 and is not easy to loosen. The number of clamping components can be set according to the requirements.

[0035] Furthermore, the axis of the through hole 11 is perpendicular to the axis of the adjacent through hole 11, so that multiple sets of clamping components apply radial pressure to the clamp from all sides of the positioning post 1, thereby strengthening the clamp to be firmly fixed on the positioning post 1.

[0036] Furthermore, the positioning post 1 has a rectangular cross-section, one end of the through hole 11 penetrates through the side of the positioning post 1, and the other end of the through hole 11 penetrates through the other side of the positioning post 1. The clamping assembly is installed on all four sides of the positioning post 1, which allows the product clamp 10 to be inserted into the fixture rod to ensure verticality. When applied to the rotation of the spraying operation, the product clamp 10 will not swing, achieving uniform coating on all four sides of the product during spraying and improving product yield.

[0037] Furthermore, the lower end of the support column 4 is provided with a mounting base 5, which facilitates installation with other equipment, such as a robotic arm.

[0038] Furthermore, the mounting base 5 is provided with a resilient pin 6, which is used to engage with mounting holes in other equipment, so that the jig rod can be securely connected to other equipment.

[0039] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A self-expanding elastic jig rod, characterized in that: The device includes a positioning post (1) and multiple clamping components. The positioning post (1) has multiple through holes (11) that radially penetrate the positioning post (1). Each pair of clamping components is respectively engaged at both ends of the through holes (11). Each clamping component includes a groove (7), an elastic element (8), and a positioning bead (9). The opening of the groove (7) faces the side of the positioning post (1). The elastic element (8) and the positioning bead (9) are both placed inside the groove (7). One end of the elastic element (8) is connected to the inner wall of the groove (7), and the other end of the elastic element (8) is connected to the positioning bead (9). The groove (7) is engaged in the end of the corresponding through hole (11), and the side of the positioning bead (9) protrudes from the side of the positioning post (1) through the opening of the groove (7).

2. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The upper and lower parts of the positioning bead (9) abut against the inner wall of the groove (7).

3. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The top of the positioning post (1) is provided with a conical head (2).

4. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The lower end of the positioning post (1) is provided with a snap-fit ​​post (3) and a support post (4) in sequence. The radial distance of the positioning post (1) is less than the radial distance of the snap-fit ​​post (3). The radial distance of the snap-fit ​​post (3) is less than the radial distance of the support post (4). The side of the positioning bead (9) protrudes from the side of the snap-fit ​​post (3) through the opening of the groove (7).

5. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The end of the groove (7) extends into a fixing block (71) around the opening, and the inner wall of the fixing block (71) abuts against the positioning post (1).

6. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The multiple through holes (11) are spaced apart from top to bottom.

7. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The axis of the through hole (11) is perpendicular to the axis of the adjacent through hole (11).

8. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The positioning post (1) has a rectangular cross-section, one end of the through hole (11) penetrates the side of the positioning post (1), and the other end of the through hole (11) penetrates the other side of the positioning post (1).

9. The elastic self-expanding clamping fixture rod according to claim 1, characterized in that: The lower end of the support column (4) is provided with a mounting base (5).

10. The elastic self-expanding clamping fixture rod according to claim 9, characterized in that: The mounting base (5) is provided with a resilient pin (6).

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