High-precision clamp centering and positioning mechanism

Abstract

The utility model relates to the technical field of machining, and discloses a high-precision clamp centering and positioning mechanism which comprises a limiting seat, a positive and negative trapezoidal thread nut is fixedly connected to the interior of the limiting seat, and two transmission screws are rotationally connected to the interior of the positive and negative trapezoidal thread nut. Two limiting plates are slidably connected to the exterior of the transmission screw rod, rotating assemblies used for rotating are rotatably connected to the interiors of the two limiting plates, each rotating assembly comprises a pin, the exterior of each pin is rotatably connected to the interior of the corresponding limiting plate, and adjusting screws are fixedly connected to the tops of the two limiting plates. And the outer part of the adjusting screw is in threaded connection with a locking nut. According to the mechanism, the purpose that the positioning plates on the two sides of the mechanism shrink at the same time during positioning is achieved according to the principle that the screwing directions of the positive and negative threads are different, the positioning efficiency is improved, it is guaranteed that workpieces are kept stable in the whole machining process, and therefore the overall production efficiency is optimized, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field especially, relate to a high accuracy clamp split positioning mechanism. BACKGROUND

[0002] With the improvement of the uniformity requirement of the blank of the customer product, in the fixture design, the traditional single side positioning mode has been unable to satisfy the positioning requirement, especially in the uniformity and positioning precision of the blank, this change makes the traditional single side positioning mode gradually expose many deficiencies in the practical application, cannot effectively satisfy the demand of modern manufacturing industry.

[0003] In the prior art, part of the mechanism usually relies on single or limited clamping point when fixing the blank, which cannot provide sufficient positioning ability and accuracy when fixing the blank, and the workpiece is displaced due to the influence of external force, resulting in the decline of machining precision and the product quality not meeting the standard, therefore, a high-precision clamp split positioning mechanism is proposed to solve the above problems. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a high-precision clamp split positioning mechanism, which aims at improving the problem that part of the device in the prior art cannot be accurately positioned during positioning.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A high-precision clamp split positioning mechanism, comprising a limiting seat, the inside of the limiting seat is fixedly connected with a reverse trapezoidal thread nut, the inside of the reverse trapezoidal thread nut is rotatably connected with two transmission screw rods, the outside of the transmission screw rod is slidably connected with two limiting plates, the inside of the two limiting plates is rotatably connected with a rotating assembly for rotation;

[0007] As a further description of the above technical scheme:

[0008] The rotating assembly comprises a pin, the outside of the pin is rotatably connected in the inside of the limiting plate;

[0009] As a further description of the above technical scheme:

[0010] The top of the two limiting plates is fixedly connected with an adjusting screw, the outside of the adjusting screw is threadedly connected with a locking nut;

[0011] As a further description of the above technical scheme:

[0012] The two transmission screw rods are left rotation and right rotation respectively, the outside of the transmission screw rod penetrates in the inside of the limiting seat;

[0013] As a further description of the above technical solutions:

[0014] The outer portions of the two transmission screws are at the bottom of the pin, and the outer portions of the pin are respectively at the left and right sides of the positive and negative trapezoidal thread nuts.

[0015] The utility model has the following beneficial effects:

[0016] 1、The mechanism utilizes the principle of different rotation directions of positive and negative threads, realizes the purpose of simultaneous contraction of the two positioning plates in the mechanism during positioning, and realizes positioning of the blank, the advantage of the mechanism is that positioning efficiency is improved, workpieces are kept stable during the whole machining process, and therefore overall production efficiency is optimized and product quality is improved.

[0017] 2、In the utility model, the nut is designed to have a trapezoidal thread structure, the self-locking property of the trapezoidal thread is utilized, positioning is realized, and the requirement of pressing is also met, loosening during machining is avoided, the trapezoidal thread structure of the designed nut provides an effective pressure maintaining mode for the high-precision clamp center positioning mechanism, the workpiece can be effectively held during the machining process, and therefore the consistency and high quality of products are ensured.

[0018] 3、In the utility model, the positioning plate is additionally provided with an adjusting screw, the center of the structure can be quickly adjusted, machining and debugging efficiency is improved, the efficient and quick adjusting mechanism makes the overall machining process more smooth, production efficiency is improved, and the risk of rework caused by inaccurate positioning is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A three-dimensional schematic view of a high-precision clamp center positioning mechanism is provided for the utility model;

[0020] Figure 2 A structure schematic view of a pin of a high-precision clamp center positioning mechanism is provided for the utility model;

[0021] Figure 3 A structure schematic view of a transmission screw of a high-precision clamp center positioning mechanism is provided for the utility model;

[0022] Figure 4 A structure schematic view of a locking nut of a high-precision clamp center positioning mechanism is provided for the utility model.

[0023] LEGEND:

[0024] 1, limit seat; 2, positive and negative trapezoidal thread nut; 3, transmission screw; 4, pin; 5, limit plate; 6, locking nut; 7, adjusting screw. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0026] With reference to Figures 1 to 3 The utility model provides an embodiment: a high accuracy clamp split center positioning mechanism, including limit seat 1, its characterized in being: the inside fixed connection of limit seat 1 has positive and negative trapezoidal thread nut 2, and positive and negative trapezoidal thread nut 2 and transmission screw rod 3 are assembled in limit seat 1 respectively, the inside rotation of positive and negative trapezoidal thread nut 2 is connected with two transmission screw rods 3, and the thread of left transmission screw rod 3 and right transmission screw rod 3 rotates in opposite directions, and respectively rotates into positive and negative trapezoidal thread nut 2, the outside sliding of transmission screw rod 3 is connected with two limit plates 5, the inside rotation of two limit plates 5 is connected with rotating assembly for rotating, and rotating assembly includes pin 4, the outside rotation of pin 4 is connected in the inside of limit plate 5, by rotating positive and negative trapezoidal thread nut 2, drive transmission screw rod 3 to move evenly to both sides, and then drive limit plate 5 to rotate around pin 4, and then realize the purpose of split center positioning;

[0027] With reference to Figure 4 The top of two limit plates 5 is fixedly connected with adjusting screw 7, and the outside of adjusting screw 7 is threadedly connected with locking nut 6, and the collocation of adjusting screw 7 and locking nut can quickly adjust the center of the positioned object, two transmission screw rods 3 are left rotation and right rotation respectively, the outside of transmission screw rod 3 penetrates in the inside of limit seat 1, and the outside of two transmission screw rods 3 is at the bottom of pin 4, and the outside of pin 4 is at the left and right sides of positive and negative trapezoidal thread nut 2 respectively.

[0028] Working principle: the working procedure of the high accuracy clamp split center positioning mechanism is as follows: first, the operator rotates positive and negative trapezoidal thread nut 2 in the inside of limit seat 1, the nut is assembled with two transmission screw rods 3 inside, and the left and right transmission screw rods 3 rotate in opposite directions and rotate into or rotate out of positive and negative trapezoidal thread nut 2 respectively, this movement makes the two transmission screw rods 3 move evenly in the horizontal direction, the outside of transmission screw rod 3 is slidably connected with two limit plates 5, along with the movement of transmission screw rod 3, limit plate 5 also moves to both sides synchronously, and then limit plate 5 can rotate on the surface of pin 4, and the whole mechanism can realize accurate split center positioning according to the displacement and rotation of limit plate 5;

[0029] Before the structure is used, the center position of the positioned object is quickly adjusted by adjusting screw 7. The external thread of adjusting screw 7 is combined with lock nut 6 to ensure that the adjusted position is stable and reliable, and work efficiency is improved.

[0030] Finally, it should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing detailed description of the application has been made, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A high-precision clamp centering and positioning mechanism, comprising a limiting seat (1), characterized in that: The limiting seat (1) is fixedly connected to a positive and negative trapezoidal threaded nut (2), and the positive and negative trapezoidal threaded nut (2) is rotatably connected to two transmission screws (3). The transmission screws (3) are slidably connected to two limiting plates (5) on the outside. The two limiting plates (5) are rotatably connected to a rotating component for rotation.

2. The high-precision clamp centering and positioning mechanism according to claim 1, characterized in that: The rotating assembly includes a pin (4), which is externally rotatably connected to the inside of the limiting plate (5).

3. The high-precision clamp centering and positioning mechanism according to claim 1, characterized in that: The tops of the two limiting plates (5) are fixedly connected with adjusting screws (7), and the external threads of the adjusting screws (7) are connected with locking nuts (6).

4. The high-precision clamp centering and positioning mechanism according to claim 1, characterized in that: The two drive screws (3) rotate to the left and to the right respectively, and the outside of the drive screws (3) penetrates the inside of the limiting seat (1).

5. A high-precision clamp centering and positioning mechanism according to claim 2, characterized in that: The two drive screws (3) are located at the bottom of the pin (4), and the pin (4) is located on the left and right sides of the positive and negative trapezoidal threaded nuts (2).

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