Synchronous linkage self-centering clamp for rotary body parts

Abstract

The invention relates to a synchronous linkage self-centering clamp for rotary body parts. The synchronous linkage self-centering clamp comprises an object carrying cover, a lead screw transmission mechanism, a clamping block, a fine adjustment mechanism and a bottom plate. The lead screw transmission mechanism is provided with a lead screw, a first supporting seat, a second supporting seat, a sliding block, a hand wheel and a locking wrench. The first supporting seat and the second supporting seat are connected with the bottom plate through bolts to fix the lead screw transmission mechanism and are provided with bearings matched with the lead screw; the two sliding blocks moving oppositely are located at the two ends of the lead screw and provided with nuts matched with the lead screw, and the hand wheel and the locking wrench are located at the end, matched with the first supporting base, of the lead screw. The lead screw sequentially penetrates through the hand wheel, the first supporting base, the sliding block and the second supporting base. The fine adjustment mechanism is fixed below the bottom plate through bolts and is provided with a pitching rotating table and a two-dimensional precise translation table which are used for adjusting the position of the clamp; the clamping block is fixed to the sliding block through a bolt, and the carrying cover is provided with a groove used for the clamping block to move. The sliding blocks in the same direction are synchronously linked and positioned, the four clamping blocks in the two directions are clamped at the same time, and automatic centering positioning and clamping of the rotary body part can be accurately achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rotary body parts processing tooling, in particular to a synchronous linkage self-centering clamp. Background Art

[0002] The design of the fixture first appeared in the late 18th century. Initially, it was mainly manual and simple mechanical devices used to fix and clamp workpieces. With the development of technology, the tooling fixtures of rotating parts have made great progress in technology, and there are more and more types. Patent document CN202222643676.5 discloses a tooling fixture for rotating parts. The rotating rod drives the jacket to rotate, drives the raised block to rotate so that the connecting rod pushes the clamp to move inward to clamp the part, and quickly positions the part in the center position, but its clamping stability is easily affected, and it is not suitable for rotating parts with large axial dimensions. Patent document CN202210884757.6 discloses a machining fixture and application method for special-shaped rotating parts. The clamping screw pushes the cross bar when screwing in to fit and press the bottom end of the special-shaped rotating part to achieve axial positioning, and drives the slider to slide to push each claw to move outward and tighten in the radial direction to achieve radial positioning and internal expansion clamping of the part, but it is limited by the size of the machinable parts and there is no fine-tuning mechanism. Patent document CN201811190352.2 discloses an adaptive fixture for thin-walled rotating parts, which drives the upper and lower brackets to telescopically move by rotating the main shaft and sleeve, and adjusts the rotation angle and height by adjusting the screw and the pull block, meeting the bottom edge clamping requirements of thin-walled rotating parts of different diameters and heights, but the structure is complex, the operation is difficult, and the requirements for the workpiece are high. Therefore, it is necessary to design and study the positioning accuracy, ease of operation, and clamping reliability of the rotating parts fixture. Summary of the invention

[0003] The present invention provides a synchronous linkage self-centering clamp for rotating parts, wherein sliders in the same direction are synchronously linked for positioning, and four clamping blocks in two directions are clamped simultaneously, thereby being able to accurately realize automatic centering positioning and clamping of rotating parts.

[0004] In order to achieve the above-mentioned purpose, the synchronous linkage self-centering fixture of the rotating body parts described in the present invention includes a loading cover, a screw transmission mechanism, a clamping block, a fine-tuning mechanism and a base plate. The screw transmission mechanism is provided with a screw, a first support seat, a second support seat, a slider, a handwheel and a locking wrench; the first support seat and the second support seat are connected to the base plate by bolts to fix the screw transmission mechanism, and are provided with bearings that match the screw; two sliders that move in opposite directions are located at both ends of the screw, and are both provided with nuts that match the screw, and the handwheel and the locking wrench are located at one end of the screw that matches the first support seat; the screw passes through the handwheel, the first support seat, the slider and the second support seat in sequence; the fine-tuning mechanism is fixed to the bottom of the base plate by bolts, and is provided with a pitch rotation table and a two-dimensional precision translation table for adjusting the position of the fixture; the clamping block is fixed to the slider by bolts, and the loading cover is provided with a groove for moving the clamping block.

[0005] The hand wheel is provided with a threaded hole, and the motion transmission from the hand wheel to the lead screw is realized by tightening the screw to support the lead screw.

[0006] The bottom of the locking wrench is provided with a thread matched with the locking hole at the top end of the first support seat. The slider is locked by tightening the wrench, and the wrench can be disassembled after being locked.

[0007] The two lead screws are perpendicular to each other and arranged alternately up and down, have no threads in the middle, and have threads at both ends with opposite rotation directions.

[0008] The front part of the clamping block is a V-shaped structure, and the contact part with the rotating body part is a flat surface.

[0009] The bottom plate is provided with a groove for movement and limiting of the slider, and a connecting plate for connecting the first supporting seat and the second supporting seat is fixed by bolts.

[0010] The loading cover is provided with a groove for the screw to penetrate and for the clamping block to move and limit, and is connected to the bottom plate through a set screw.

[0011] The present invention has the following advantages:

[0012] The synchronous linkage self-centering clamp for rotating body parts of the present invention is simple to operate, easy to use, accurate in positioning, and reliable in clamping. During use, it is only necessary to rotate the hand wheel to drive the lead screw to rotate, and the two opposing slide blocks are synchronously linked to position, and the four clamping blocks in two directions can simultaneously clamp the rotating body parts. At the same time, the position of the clamp can be adjusted by a fine-tuning mechanism, thereby effectively improving the positioning accuracy. It is suitable for mass production of parts and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0014] Figure 2 It is the front view of the present invention.

[0015] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 4 It is a top view of the present invention.

[0017] Among them, 1-hand wheel; 2-locking wrench; 3-first support seat; 4-slider; 5-clamping block; 6-base plate; 7-screw; 8-second support seat; 9-carrying cover; 10-pitch rotation table; 11-two-dimensional precision translation table; 12-fine adjustment mechanism; 13-screw transmission mechanism. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0019] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The synchronous linkage self-centering fixture for rotating body parts of the present invention comprises a loading cover 9, a screw transmission mechanism 13, a clamping block 5, a fine adjustment mechanism 12 and a base plate 6. The screw transmission mechanism 13 is provided with a screw 7, a first support seat 3, a second support seat 8, a slider 4, a hand wheel 1 and a locking wrench 2; the first support seat 3 and the second support seat 8 are connected to the base plate 6 by bolts to fix the screw transmission mechanism 13, and are provided with bearings matching with the screw 7; two sliders 4 moving in opposite directions are located at both ends of the screw 7, and are both provided with nuts matching with the screw 7, and the hand wheel 1 and the locking wrench 2 are located at one end of the screw 7 matching with the first support seat 3; the screw 7 passes through the hand wheel 1, the first support seat 3, the slider 4 and the second support seat 8 in sequence; the fine adjustment mechanism 12 is fixed to the bottom of the base plate 6 by bolts, and is provided with a pitch rotation table 10 and a two-dimensional precision translation table 11 for adjusting the position of the fixture; the clamping block 5 is fixed to the slider 4 by bolts, and the loading cover 9 is provided with a groove for the movement of the clamping block 5.

[0020] The hand wheel 1 is provided with a threaded hole, and the motion transmission from the hand wheel 1 to the lead screw 7 is realized by tightening the screw to support the lead screw 7.

[0021] The bottom of the locking wrench 2 is provided with a thread that matches the locking hole at the top of the first support seat 3. The slider 4 is locked by tightening the wrench, and the wrench can be disassembled after being locked.

[0022] The two lead screws 7 are perpendicular to each other and arranged in an up-and-down staggered manner, have no threads in the middle, and have threads at both ends with opposite rotation directions.

[0023] The front part of the clamping block 5 is a V-shaped structure, and the contact part with the rotating body part is a flat surface.

[0024] The bottom plate 6 is provided with a groove for movement and limitation of the slider 4, and a connecting plate for connecting the first supporting seat 3 and the second supporting seat 8 is fixed by bolts.

[0025] The loading cover 9 is provided with grooves for the screw 7 to penetrate and for the clamping block 5 to move and limit, and is connected to the base plate 6 by means of set screws.

[0026] The specific working process of the present invention is:

[0027] Place the rotating part to be clamped on the loading cover 9, rotate the handwheel 1 to drive the screw 7 to rotate, and the screw 7 simultaneously drives the two sliders 4 and the clamping block 5 moving in opposite directions to move synchronously. When any slider 4 contacts the part first, it continues to push the part and the sliders 4 in the other three directions closer to each other until the four sliders 4 are in good contact with the part. At the same time, the clamping block 5 clamps the part, and the locking wrench 2 is turned to lock the position of the slider 4, thereby realizing the self-centering positioning and clamping of the rotating part.

[0028] After the parts are clamped, trial processing is carried out according to the processing content, and the pitch rotation table 10 and the two-dimensional precision translation table 11 are adjusted according to the processing effect to compensate for the position error, thereby achieving accurate centering and positioning of the parts and ensuring the processing effect.

Claims

1. A synchronous linkage self-centering fixture for rotating parts, characterized in that: The invention comprises a loading cover (9), a screw transmission mechanism (13), a clamping block (5), a fine adjustment mechanism (12) and a base plate (6). The screw transmission mechanism (13) is provided with a screw (7), a first support seat (3), a second support seat (8), a slider (4), a hand wheel (1) and a locking wrench (2); the first support seat (3) and the second support seat (8) are connected to the base plate (6) by bolts to fix the screw transmission mechanism (13), and bearings matching the screw (7) are provided; two sliders (4) moving in opposite directions are located at both ends of the screw (7), and nuts matching the screw (7) are provided, and the hand wheel (1) and the locking wrench are provided. (2) is located at one end of the lead screw (7) and the first support seat (3); the lead screw (7) passes through the hand wheel (1), the first support seat (3), the slider (4) and the second support seat (8) in sequence; the fine adjustment mechanism (12) is fixed to the bottom of the base plate (6) by bolts, and is provided with a pitch rotation table (10) and a two-dimensional precision translation table (11) for adjusting the position of the clamp; the clamping block (5) is fixed to the slider (4) by bolts, and the loading cover (9) is provided with a groove for moving the clamping block (5).

2. The synchronous linkage self-centering fixture for rotating parts according to claim 1 is characterized in that: The hand wheel (1) is provided with a threaded hole, and the motion transmission from the hand wheel (1) to the lead screw (7) is achieved by tightening the screw to support the lead screw (7).

3. The synchronous linkage self-centering fixture for rotating parts according to claim 1 is characterized in that: The bottom of the locking wrench (2) is provided with a thread that matches the locking hole at the top of the first support seat (3). The slider (4) is locked by tightening the wrench, and the wrench can be disassembled after being locked.

4. The synchronous linkage self-centering fixture for rotating parts according to claim 1 is characterized in that: The two lead screws (7) are perpendicular to each other and arranged in an up-and-down staggered manner, have no threads in the middle, and have threads at both ends with opposite rotation directions.

5. The synchronous linkage self-centering fixture for rotating parts according to claim 1 is characterized in that: The front part of the clamping block (5) is a V-shaped structure, and the contact part with the rotating body part is a flat surface.

6. The synchronous linkage self-centering fixture for rotating parts according to claim 1 is characterized in that: The bottom plate (6) is provided with a groove for movement and limiting of the slider (4), and a connecting plate for connecting the first support seat (3) and the second support seat (8) is fixed by bolts.

7. The synchronous linkage self-centering fixture for rotating parts according to claim 1 is characterized in that: The loading cover (9) is provided with a groove for the lead screw (7) to penetrate and for the clamping block (5) to move and limit, and is connected to the base plate (6) via a set screw.

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