Three-jaw centering mechanism

Abstract

The utility model discloses a three-jaw centering mechanism which comprises a base plate, a through hole is formed in the base plate, the three-jaw centering mechanism further comprises a synchronous linkage ring and a linkage rod, at least three sliding rails which are distributed in a center radial shape are fixed to the base plate, the included angles between the adjacent sliding rails are equal, each sliding rail is provided with a sliding block, and the sliding blocks are connected with the linkage rod. A plurality of connecting ends are evenly distributed on the circumference of the synchronous linkage ring, the number of the connecting ends is the same as that of the sliding blocks, and each sliding block is movably connected to the connecting end of the synchronous linkage ring through a linkage rod. Compared with the prior art, the clamping mechanism has the advantages that the linkage mechanism is arranged, all parts are flattened, the concentricity during clamping is ensured, the overall thickness of the mechanism is reduced, the occupied space is small, and the application range is wider. And meanwhile, the clamping end and the sliding block are integrally formed, so that the mechanism is simplified, the cost is reduced, the whole mechanism is simpler, the failure rate is low, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a clamping and positioning mechanism, in particular to a three-jaw centering mechanism. Background Art

[0002] During the production process, when positioning a cylindrical product, it is necessary to ensure its concentricity to ensure the machining accuracy and qualification rate. For the existing similar positioning devices for cylindrical products, their positioning concentricity is poor, which affects the machining accuracy and results in a high defective rate. At the same time, the overall thickness of the existing similar positioning devices is large, occupying a large space, affecting the application range of the positioning device, and it is difficult to be applicable to some equipment. Therefore, developing a three-jaw centering mechanism has become an urgent problem for those skilled in the art. Summary of the Utility Model

[0003] The utility model is to solve the above deficiencies and provides a three-jaw centering mechanism.

[0004] The above object of the utility model is achieved by the following technical solutions: A three-jaw centering mechanism includes a base plate, and a through hole is provided on the base plate. It is characterized in that: the three-jaw centering mechanism further includes a synchronous linkage ring and linkage rods. The base plate is fixed with at least three slide rails distributed in a central radial pattern, and the angles between adjacent slide rails are equal. Each slide rail is provided with a slider. On the synchronous linkage ring, a plurality of connection ends equal in number to the sliders are evenly distributed on its circumference. Each slider is movably connected to the connection end of the synchronous linkage ring through a linkage rod.

[0005] Further, the front end of the slider is set as a clamping end, and the clamping end is integrally formed with the slider.

[0006] Further, the slide rails, sliders, linkage rods, and synchronous linkage ring are all flat-shaped, reducing the overall thickness of this mechanism.

[0007] Further, the main body of the synchronous linkage ring is a perfect circle.

[0008] For the three-jaw centering mechanism of the utility model, when a thrust is provided to any one of the sliders in the direction towards the center of the chassis, the head clamping ends of the three sliders can be simultaneously gathered towards the center. Under the condition of ensuring the machining accuracy, it can be coaxial with the through hole of the chassis.

[0009] The advantages of the utility model compared with the prior art are: By setting a linkage mechanism and flattening each component, the concentricity during clamping is ensured, the overall thickness of this mechanism is reduced, the occupied space is smaller, and the application range is wider. At the same time, the clamping end is integrally formed with the slider, which simplifies the mechanism, reduces the cost, makes the overall mechanism more concise, has a low failure rate, and extends the service life. Brief Description of the Drawings

[0010] Figure 1 This is the structural schematic diagram of the utility model.

[0011] Figure 2 This is the top view of the utility model.

[0012] Figure 3 This is the exploded view of the utility model. Detailed implementation mode

[0013] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0014] As Figure 1 , Figure 2 and Figure 3 shown, a three-jaw centering mechanism includes a base plate 1. A through hole 2 is provided on the base plate 1. The three-jaw centering mechanism further includes a synchronous linkage ring 3 and a linkage rod 4. At least three radially distributed slide rails 5 are fixed on the base plate 1. In this embodiment, three slide rails 5 are provided, and the included angles between adjacent slide rails 5 are equal, all being 120 degrees. Sliders 6 with exactly the same shape and size specifications are provided on the three slide rails 5. The front end of the slider 6 is set as a clamping end 7, and the clamping end 7 is integrally formed with the slider 6. The main body of the synchronous linkage ring 3 is a perfect circle, and a number of connection ends 8 equal to the number of sliders 6 are evenly distributed on its circumference. Each slider 6 is movably connected to the connection end 8 of the synchronous linkage ring 3 through a linkage rod 4. The slide rails 5, sliders 6, linkage rods 4 and synchronous linkage ring 3 are all flat-shaped to reduce the overall thickness of the mechanism.

[0015] The working principle of the present utility model: During operation, any one of the sliders 6 in the mechanism is driven by any linear motion mechanism to realize the clamping and loosening of the workpiece.

[0016] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A three-jaw centering mechanism, including a seat plate, wherein a through hole is provided on the seat plate, and it is characterized in that: The three-jaw centering mechanism further includes a synchronous linkage ring and linkage rods. The seat plate is fixed with at least three slide rails distributed in a central radial pattern, and the angles between adjacent slide rails are equal. Each slide rail is provided with a slider. On the synchronous linkage ring, a number of connecting ends equal to the number of sliders are evenly distributed on its circumference, and each slider is movably connected to the connecting end of the synchronous linkage ring through a linkage rod.

2. The three-jaw centering mechanism according to claim 1, characterized in that: The front end of the slider is set as a clamping end, and the clamping end is integrally formed with the slider.

3. The three-jaw centering mechanism according to claim 1, wherein: The slide rails, sliders, linkage rods, and synchronous linkage ring are all flat.

4. The three-jaw centering mechanism according to claim 1, characterized in that: The main body of the synchronous linkage ring is a perfect circle.

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