Synchronous centering and squeezing mechanism for left nut, right nut and lead screw

Abstract

A synchronous centering and extruding mechanism for left and right nuts and a lead screw belongs to the field of machining and comprises a mechanism body, the lead screw, a left trapezoidal nut, a support, a clamping block, a right trapezoidal nut, a limiting block and a cover plate. The clamping block is fixed on the support through a cylindrical pin and an inner hexagon screw; the left trapezoidal nut and the right trapezoidal nut are respectively mounted on the left support and the right support through interference fit; the lead screw respectively penetrates through the left trapezoidal nut and the right trapezoidal nut, so that the lead screw is positioned at symmetrical positions of the left support and the right support on the mechanism body; the cover plate is fixedly installed on the mechanism body through the cylindrical pin and the inner hexagon screw, and the support can move left and right in the cover plate. When the upper plane of a workpiece is machined and the side face extrusion position is narrow, synchronous centering extrusion of the workpiece can be achieved, and adjustment is convenient and accurate. The clamping device is compact in structure and flexible and convenient to operate, and the problems that clamping is not reliable when the upper plane of a workpiece with large blank allowance is machined for the first time, and the clamping efficiency is low when the side face squeezing position is narrow are effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of machining and relates to a workpiece clamping mechanism during machining, and more particularly to a synchronous centering clamping mechanism for left and right nuts and lead screw. Background Technology

[0002] As is well known, in machining enterprises, workers often need to position and clamp workpieces when machining them on machine tools. Correct and effective clamping and positioning of the workpiece is a crucial factor in ensuring machining quality. In existing technologies, when initially machining the upper surface of a thin, flat workpiece blank, conventional clamping methods (generally using pressure plates) are insufficient and often fail to achieve satisfactory machining results. Therefore, employing a reliable and effective clamping device is extremely important.

[0003] The utility model patent "A linkage auxiliary support clamping mechanism for plane milling" authorized by the State Intellectual Property Office on October 25, 2022, with application number CN2022212966643 and authorization announcement number CN217647935U, and application date May 27, 2022, is also the utility model patent applied for by this applicant. This utility model discloses a linkage auxiliary support clamping mechanism for planar milling, comprising: a first screw plug, a first compression spring, an auxiliary support pin, a locking lever, a guide bushing, a dust cover, a clamping block, a guide block, a sliding column, a non-loosening hexagonal thin nut, a hexagonal head clamping screw, a second screw plug, a second compression spring, and a support. The auxiliary support pin is fixedly installed in a vertical circular hole on the support, the guide bushing is fitted onto the auxiliary support pin, and the dust cover is fitted onto the guide bushing. The sliding column is installed in another vertical circular hole on the support, the clamping block is placed on the horizontal surface of the support, and the hexagonal head clamping screw is screwed onto the hexagonal thin nut and then screwed into the threaded hole on the upper part of the support, contacting the clamping block. The groove of the guide block cooperates with the clamping block and is fixed on the support. This utility model is suitable for machining workpieces with large areas and thin thicknesses. During the clamping and loosening process of the workpiece, a linkage support clamping mechanism is used to ensure cutting stability.

[0004] In practical applications, after the workpiece is effectively positioned, the machining allowance of the blank on the upper surface is as high as 2-3mm. Therefore, it is urgent to design a clamping mechanism that can synchronously and centrally clamp the side of the workpiece. This mechanism needs to be able to quickly and accurately clamp the blank workpiece, and when the upper surface of the workpiece is being machined and the side clamping position is relatively narrow, it should be able to synchronously and centrally clamp the workpiece, be easy to adjust and accurate, have good linkage, be easy to maintain, be more practical, and be able to withstand a certain cutting force. Utility Model Content

[0005] The purpose of this utility model is to provide a compact, easy-to-operate, safe and reliable synchronous centering clamping mechanism for left and right nuts and lead screws. With this mechanism, when machining the upper plane of the workpiece and the side clamping position is relatively narrow, synchronous centering clamping of the workpiece can be achieved. The adjustment is convenient and precise, the linkage is good, maintenance is convenient, and the practicality is stronger.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a synchronous centering clamping mechanism for left and right nuts and lead screws, comprising: a mechanism body, a lead screw, a left trapezoidal nut, a support, a clamping block, a workpiece, a right trapezoidal nut, a limiting block, and a cover plate; the clamping block is fixed to the support with cylindrical pins and internal hexagonal screws; the left and right trapezoidal nuts are respectively installed on the left and right supports through interference fit; the lead screw passes through the left and right trapezoidal nuts respectively, so that the lead screw is in a symmetrical position on the left and right supports of the mechanism body; the cover plate is fixedly installed on the mechanism body by cylindrical pins and internal hexagonal screws.

[0007] Limit blocks are fixedly installed at the left and right ends of the main body of the mechanism by internal hexagon screws.

[0008] The support mounted on the main body of the mechanism can move left and right on the cover plate.

[0009] The present invention, employing the above-mentioned technical solution, has the following advantages: When machining the upper surface of a workpiece and the side clamping position is relatively narrow, the present invention can achieve synchronous concentric clamping of the workpiece, which is convenient and precise to adjust, has good linkage, is easy to maintain, and is more practical. Its compact structure and flexible operation effectively solve the problems of unreliable clamping when initially machining the upper surface of a workpiece with a large blank allowance, and low clamping efficiency when the side clamping position is narrow, further enhancing the application range and practicality of the fixture and improving the workpiece machining efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of a synchronous centering clamping mechanism for left and right nuts and lead screws according to the present invention;

[0011] Figure 2 This is a top view schematic diagram of a synchronous concentric clamping mechanism between left and right nuts and lead screws according to the present invention.

[0012] Figure 3 This is a schematic diagram of the structure of a synchronous centering clamping mechanism for left and right nuts and lead screws according to the present invention, shown in direction A.

[0013] In the diagram: 1. Mechanism body, 2. Lead screw, 3. Left trapezoidal nut, 4. Support, 5. Clamping block, 6. Workpiece, 7. Right trapezoidal nut, 8. Limiting block, 9. Cover plate. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. For example... Figure 1-3 As shown, a synchronous centering clamping mechanism for left and right nuts and lead screw includes: mechanism body 1, lead screw 2, left trapezoidal nut 3, support 4, clamping block 5, workpiece 6, right trapezoidal nut 7, limit block 8, and cover plate 9.

[0015] In this embodiment, the clamping block 5 is fixedly installed on the support 4 using cylindrical pins and hexagonal screws; the left trapezoidal nut 3 and the right trapezoidal nut 7 are respectively installed on the support 4 by interference fit; the lead screw 2 passes through the left trapezoidal nut 3 and the right trapezoidal nut 7 respectively, and the lead screw 2 is adjusted to be in a symmetrical position on the left and right supports 4 on the mechanism body 1; the cover plate 9 is fixedly installed on the mechanism body 1 by cylindrical pins and hexagonal screws, and the support 4 can move left and right inside the cover plate 9; the limiting blocks 8 are fixedly installed on the left and right ends of the mechanism body 1 by hexagonal screws respectively.

[0016] Its working principle is as follows: As shown in the figure, after the workpiece 6 is positioned properly, turn one end of the lead screw 2 several times with a wrench. At this time, the left trapezoidal nut 3 and the right trapezoidal nut 7 passing through the lead screw move in opposite directions. Since the left trapezoidal nut 3 and the right trapezoidal nut 7 are assembled in the support 4, they also drive the support 4 and the clamping block 5 installed on it to perform a synchronous, opposite-direction, concentric clamping action on the workpiece 6. When one of the clamping blocks 5 contacts one end of the workpiece 6 first, continue to turn the wrench to make the lead screw 2 rotate. The trapezoidal nut passing through it drives the other support 4 and the clamping block 5 to continue moving until they contact the other end of the workpiece 6 and completely clamp the workpiece 6.

[0017] Limiting blocks 8 are installed at both ends of the mechanism body 1 to prevent the support 4 from moving excessively and disengaging from the lead screw 2.

[0018] Similarly, turning the wrench in the opposite direction causes the lead screw 2 to rotate in the opposite direction, which drives the support 4 and the clamping block 5 installed on it to perform a reverse synchronous centering and loosening action on the workpiece 6, so that the workpiece 6 can be removed.

[0019] This invention enables synchronous, centered clamping of workpieces when machining the upper plane and where the side clamping position is narrow. Adjustment is convenient and precise, with good linkage and easy maintenance. Its compact structure and flexible operation effectively solve the problems of unreliable clamping during initial machining of workpieces with large blank allowances, and low clamping efficiency when the side clamping position is narrow. This further enhances the application range and practicality of the fixture, improving workpiece machining efficiency.

[0020] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the entire content of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make formal modifications to the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Therefore, all formal modifications and equivalent substitutions made within the scope of the technical concept of this utility model should be included within the scope of protection of this utility model.

Claims

1. A synchronously aligned and tightening mechanism for left and right nuts and lead screws, comprising: The mechanism body (1), lead screw (2), left trapezoidal nut (3), support (4), clamping block (5), workpiece (6), right trapezoidal nut (7), limiting block (8), and cover plate (9) are characterized in that: the clamping block (5) is fixed on the support (4) by a cylindrical pin and an internal hexagonal screw; the left trapezoidal nut (3) and the right trapezoidal nut (7) are respectively installed on the left and right supports (4) by interference fit; the lead screw (2) passes through the left trapezoidal nut (3) and the right trapezoidal nut (7) respectively, so that the lead screw (2) is in a symmetrical position on the left and right supports (4) of the mechanism body (1); the cover plate (9) is fixed on the mechanism body (1) by a cylindrical pin and an internal hexagonal screw.

2. The synchronous concentric clamping mechanism of left and right nuts and lead screw according to claim 1, characterized in that: Limiting blocks (8) are fixedly installed at the left and right ends of the main body (1) of the mechanism by internal hexagon screws.

3. The synchronous concentric clamping mechanism of left and right nuts and lead screw according to claim 1, characterized in that: The support (4) installed on the main body (1) can move left and right on the cover plate (9).

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