Quick centering device

Abstract

The utility model discloses a quick centering device which comprises a sliding rail, a sliding block, a left clamping jaw, a right clamping jaw, a left connecting rod mechanism and a right connecting rod mechanism, the sliding rail is arranged between the left connecting rod mechanism and the right connecting rod mechanism, the sliding block is in sliding fit with the sliding rail, the left clamping jaw and the right clamping jaw are oppositely arranged, one end of the left connecting rod mechanism is matched with the left clamping jaw, and the other end of the left connecting rod mechanism is matched with the right connecting rod mechanism. One end of the left connecting rod mechanism is matched with the left clamping jaw, the other end of the right connecting rod mechanism is matched with the sliding rail, and the left clamping jaw and the right clamping jaw get close to each other and get away from each other through matching of the left connecting rod mechanism and the right connecting rod mechanism; the device has the advantages of being simple in structure, capable of accurately and rapidly finding the center of the part, small in error, suitable for various parts and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, and particularly relates to a quick centering device. Background Art

[0002] When machining parts, a reference needs to be found. These references are mostly the central axis and the rotation center. In the actual machining process, it is troublesome to determine the position of the central axis and the rotation center, and there are errors.

[0003] For example, when it is necessary to determine the central axis of a steel plate, one method is to measure the width d of the steel plate with a ruler, and then mark the ½d position of the steel plate as the point of the central axis of the steel plate. Take multiple points along the length direction of the steel plate, and finally connect the multiple points to form the central axis of the steel plate.

[0004] When it is necessary to determine the rotation center of a flange, one method is to use a ruler to find the positions of the inner tangent and the outer tangent of two adjacent equally distributed holes (the outer tangent of equally distributed hole a and the inner tangent of equally distributed hole b), draw a straight line along the position of the ruler, and then use a ruler to find the outer tangent and the inner tangent of these two adjacent equally distributed holes (the inner tangent of equally distributed hole a and the outer tangent of equally distributed hole b), draw a straight line along the position of the ruler. The intersection point of the two straight lines is the center point A. Then perform the same operation on two equally distributed holes on the opposite side of the flange. The intersection point of the two straight lines is the center point B. Measure the distance d between the center point A and the center point B, and take the ½d position to obtain the position of the rotation center.

[0005] Using the above methods, the measurement is relatively cumbersome, and the measurement error is large, resulting in inaccurate position of the determined central axis, affecting the subsequent processing of parts and having a great impact on the product quality. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art, and provide a quick centering device with a simple structure, which can accurately and quickly find the center of parts, has small errors, and is suitable for use with a variety of parts.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0008] A quick centering device, characterized in that: it includes a slide rail, a slider, a left claw, a right claw, a left link mechanism and a right link mechanism. The slide rail is arranged between the left link mechanism and the right link mechanism, and the slider is slidably matched with the slide rail;

[0009] The left claw and the right claw are arranged oppositely. One end of the left link mechanism is cooperated with the left claw, and the other end is slidably matched with the slide rail. One end of the right link mechanism is cooperated with the right claw, and the other end is slidably matched with the slide rail;

[0010] The left jaw and the right jaw approach and move away from each other through the cooperation of the left link mechanism and the right link mechanism;

[0011] Through the cooperation of the left jaw and the right jaw, the slide rail is located at the center position of the component. By moving the slider along the slide rail for marking, the central axis or the rotation center of the component can be obtained. The structure is simple, the operation is convenient, the center of the component can be accurately and quickly found, and the centering accuracy is high.

[0012] A marking center hole is provided at the center of the slider of the present utility model; the center position of the component is determined by moving the slider along the slide rail and scribing at the marking center hole.

[0013] The left jaw of the present utility model includes a left connecting frame, a left limiting plate and a left limiting column. A left limiting plate is fixed at the upper end of the left connecting frame, and a left limiting column is fixed at the lower end;

[0014] The right jaw includes a right connecting frame, a right limiting plate and a right limiting column. A right limiting plate is fixed at the upper end of the right connecting frame, and a right limiting column is fixed at the lower end;

[0015] By arranging the left limiting plate and the right limiting plate oppositely, components such as steel plates and channel steels can be clamped and limited for centering. By arranging the left limiting column and the right limiting column oppositely, the left limiting column and the right limiting column can be inserted into the equally distributed holes of the flange to center components such as flanges, realizing the centering of a variety of different components.

[0016] The left connecting frame of the present utility model includes a left upper panel, a left side panel and a left lower panel. The left upper panel and the left lower panel are arranged oppositely up and down. The upper end of the left side panel is fixedly connected to the left end of the left upper panel, and the lower end is fixedly connected to the left end of the left lower panel. The left upper panel, the left lower panel and the left side panel form a U-shaped groove structure with an opening facing the slide rail;

[0017] The right connecting frame includes a right upper panel, a right side panel and a right lower panel. The right upper panel and the right lower panel are arranged oppositely up and down. The upper end of the right side panel is fixedly connected to the right end of the right upper panel, and the lower end is fixedly connected to the right end of the right lower panel. The right upper panel, the right lower panel and the right side panel form a U-shaped groove structure with an opening facing the slide rail;

[0018] The structural settings of the left connecting frame and the right connecting frame facilitate the cooperation with the left link mechanism and the right link mechanism.

[0019] The left link mechanism of the present utility model includes a left link A and a left link B. A left gear A is provided at the left end of the left link A, and a left gear B is provided at the left end of the left link B. The left gear A and the left gear B are arranged at the position of the left connecting frame and are meshed with each other;

[0020] The right link mechanism includes a right link A and a right link B. A right gear A is provided at the right end of the right link A, and a right gear B is provided at the right end of the right link B. The right gear A and the right gear B are arranged at the position of the right connecting frame and are meshed with each other;

[0021] The right end of the left link A is hinged to the left end of the right link A and is in sliding fit with the slide rail. The right end of the left link B is hinged to the left end of the right link B and is in sliding fit with the slide rail;

[0022] To achieve the positioning of the positions of the left claw and the right claw.

[0023] In the utility model, the left gear A and the left gear B are located in the U-shaped groove of the left connecting frame. A left gear shaft A and a left gear shaft B are provided in the U-shaped groove of the left connecting frame. The left gear A is sleeved on the left gear shaft A, and the left gear B is sleeved on the left gear shaft B;

[0024] The right gear A and the right gear B are located in the U-shaped groove of the right connecting frame. A right gear shaft A and a right gear shaft B are provided in the U-shaped groove of the right connecting frame. The right gear A is sleeved on the right gear shaft A, and the right gear B is sleeved on the right gear shaft B; to limit the positions of the gears.

[0025] The lower end face of the left link A is stepped. The thickness on the right side of the left link A is smaller than that on the left side. The lower end face on the right side of the left link A forms a lower left connecting surface;

[0026] The upper end face of the right link A is stepped. The thickness on the left side of the right link A is smaller than that on the right side. The upper end face on the left side of the right link A forms an upper right connecting surface;

[0027] The upper end face of the left link B is stepped. The thickness on the right side of the left link B is smaller than that on the left side. The upper end face on the right side of the left link B forms an upper left connecting surface;

[0028] The lower end face of the right link B is stepped. The thickness on the left side of the right link B is smaller than that on the right side. The lower end face on the left side of the right link B forms a lower right connecting surface;

[0029] When the left claw and the right claw approach or separate from each other, the lower left connecting surface is in contact with the upper right connecting surface, and the upper left connecting surface is in contact with the lower right connecting surface;

[0030] To ensure that the positions of the left claw and the right claw are on the same horizontal plane and ensure the accuracy of centering.

[0031] The utility model further comprises a front pin shaft and a rear pin shaft. A chute is formed in the slide rail along its length direction. Pin holes for the pin shaft to pass through are formed at the right end of the left link A, the left end of the right link A, the right end of the left link B, and the left end of the right link B. The front pin shaft is located on the front side of the slider and is inserted into the pin holes of the left link A and the right link A and the chute. The rear pin shaft is located on the rear side of the slider and is inserted into the pin holes of the left link B and the right link B and the chute;

[0032] The connection between the left link mechanism and the right link mechanism is realized, driving the left claw and the right claw to approach or move away from each other.

[0033] At the upper end of the front pin shaft of the utility model, a front upper limiting protrusion extends radially outwards, and at the lower end, a front lower limiting protrusion extends radially outwards;

[0034] At the upper end of the rear pin shaft, a rear upper limiting protrusion extends radially outwards, and at the lower end, a rear lower limiting protrusion extends radially outwards;

[0035] To limit the link and the slide rail.

[0036] The left link mechanism of the utility model comprises a left link A and a left link B. The left end of the left link A is hinged to the left end of the left link B at the left connection frame position. The right link mechanism comprises a right link A and a right link B. The right end of the right link A is hinged to the right end of the right link B at the right connection frame position;

[0037] To realize driving the left claw and the right claw to approach and move away from each other through the left link mechanism and the right link mechanism.

[0038] The beneficial effects of the utility model are as follows: Through the cooperation of the left claw and the right claw, the slide rail is located at the central position of the component. By moving the slider along the slide rail for marking, the central axis or the center of rotation of the component can be obtained. The structure is simple, the operation is convenient, the center of the component can be found accurately and quickly, and the centering accuracy is high; By arranging the left limiting plate and the right limiting plate relatively, components such as steel plates and channel steels can be clamped and limited for centering. By arranging the left limiting column and the right limiting column relatively, the left limiting column and the right limiting column can be inserted into the evenly distributed holes of the flange to center components such as flanges, realizing the centering of various different components. Description of the Drawings

[0039] Figure 1 is the overall structural schematic diagram of the centering device of the utility model.

[0040] Figure 2 is the perspective view of the left claw of the centering device of the utility model.

[0041] Figure 3 is the schematic diagram of steel plate centering of the utility model.

[0042] Figure 4 This is a schematic diagram of flange centering of the present utility model.

[0043] Reference numerals: slide rail - 1, chute - 101;

[0044] slider - 2, marking center hole - 201;

[0045] left claw - 3, left limit plate - 301, left limit post - 302, left connecting frame - 303, left upper panel - 3031, left side panel - 3032, left lower panel - 3033;

[0046] right claw - 4, right limit plate - 401, right limit post - 402, right connecting frame - 403, right upper panel - 4031, right side panel - 4032, right lower panel - 4033;

[0047] left connecting rod A - 501, left gear A - 5011, lower left connecting surface - 5012;

[0048] left connecting rod B - 502, left gear B - 5021, upper left connecting surface - 5022;

[0049] right connecting rod A - 601, right gear A - 6011, upper right connecting surface - 6012;

[0050] right connecting rod B - 602, right gear B - 6021, lower right connecting surface - 6022;

[0051] front pin shaft - 7, front upper limit projection - 701, front lower limit projection - 702;

[0052] rear pin shaft - 8, rear upper limit projection - 801, rear lower limit projection - 802;

[0053] steel plate - 9, left side surface of steel plate - 901, right side surface of steel plate - 902;

[0054] flange - 10, evenly distributed holes a - 1001, evenly distributed holes b - 1002, evenly distributed holes c - 1003. Specific implementation mode

[0055] The present utility model will be described below in conjunction with the accompanying drawings and embodiments.

[0056] Embodiment 1:

[0057] As shown in the attached Figure 1-2As shown in the figure, a quick centering device includes a slide rail 1, a slider 2, a left claw 3, a right claw 4, a left link mechanism and a right link mechanism. The slide rail 1 is arranged between the left link mechanism and the right link mechanism. The slider 2 is slidably engaged with the slide rail 1. In this embodiment, a through groove 101 is formed in the slide rail along its length direction, and a marked center hole 201 is formed at the center of the slider 2.

[0058] The left claw 3 and the right claw 4 are arranged opposite to each other left and right. One end of the left link mechanism is engaged with the left claw 3, and the other end is slidably engaged with the slide rail 1. One end of the right link mechanism is engaged with the right claw 4, and the other end is slidably engaged with the slide rail 1.

[0059] The left claw 3 and the right claw 4 approach and move away from each other through the cooperation of the left link mechanism and the right link mechanism.

[0060] Through the cooperation of the left claw 3 and the right claw 4, the slide rail 1 is located at the center position of the component. By moving the slider 2 along the slide rail 1 and scribing at the marked center hole 201 of the slider 2, the center position of the component can be determined. Finally, the central axis or the center of rotation of the component can be obtained. The structure is simple, the operation is convenient, the center of the component can be accurately and quickly found, and the centering accuracy is high.

[0061] The left claw 3 includes a left connecting frame 303, a left limiting plate 301 and a left limiting column 302. The left connecting frame 303 includes a left upper panel 3031, a left side panel 3032 and a left lower panel 3033. The left upper panel 3031 and the left lower panel 3033 are arranged opposite to each other up and down. The upper end of the left side panel 3032 is fixedly connected to the left end of the left upper panel 3031, and the lower end is fixedly connected to the left end of the left lower panel 3033. The left upper panel 3031, the left lower panel 3033 and the left side panel 3032 form a U-shaped groove structure with an opening facing the slide rail.

[0062] The upper end of the left upper panel 3031 is fixedly provided with a left limiting plate 301, and the lower end is fixedly provided with a left limiting column 302.

[0063] The right claw 4 includes a right connecting frame 403, a right limiting plate 401 and a right limiting column 402. The right connecting frame 403 includes a right upper panel 4031, a right side panel 4032 and a right lower panel 4033. The right upper panel 4031 and the right lower panel 4033 are arranged opposite to each other up and down. The upper end of the right side panel 4032 is fixedly connected to the right end of the right upper panel 4031, and the lower end is fixedly connected to the right end of the right lower panel 4033. The right upper panel 4031, the right lower panel 4033 and the right side panel 4032 form a U-shaped groove structure with an opening facing the slide rail.

[0064] The upper end of the right upper panel 4031 is fixedly provided with a right limiting plate 401, and the lower end is fixedly provided with a right limiting column 402.

[0065] The structural settings of the left connecting frame 303 and the right connecting frame 403 facilitate the cooperation with the left connecting rod mechanism and the right connecting rod mechanism. The left limiting plate 301 and the right limiting plate 401 are arranged oppositely, and can clamp and limit parts such as steel plates and channel steels for centering. The left limiting column 302 and the right limiting column 402 are arranged oppositely, and the left limiting column and the right limiting column can be inserted into the evenly distributed holes of the flange to center parts with evenly distributed holes such as flanges, realizing the centering of a variety of different parts.

[0066] The left connecting rod mechanism includes a left connecting rod A501 and a left connecting rod B502. A left gear A5011 is provided at the left end of the left connecting rod A501, and a left gear B5021 is provided at the left end of the left connecting rod B502. The left gear A5011 and the left gear B5021 are arranged at the position of the left connecting frame and are meshed with each other;

[0067] In this embodiment, the left gear A5011 and the left gear B5021 are located in the U-shaped groove of the left connecting frame 303. Further, a left gear shaft A and a left gear shaft B (not shown in the figure) are provided in the U-shaped groove of the left connecting frame 303. The left gear A5011 is sleeved on the left gear shaft A, and the left gear B5021 is sleeved on the left gear shaft B. In this embodiment, the upper ends of the left gear shaft A and the left gear shaft B are respectively fixedly connected to the upper left panel, and the lower ends are fixedly connected to the lower left panel. The left gear A is rotationally matched with the left gear shaft A, and the left gear B is rotationally matched with the left gear shaft B;

[0068] The right connecting rod mechanism includes a right connecting rod A601 and a right connecting rod B602. A right gear A6011 is provided at the right end of the right connecting rod A601, and a right gear B6021 is provided at the right end of the right connecting rod B602. The right gear A6011 and the right gear B6021 are arranged at the position of the right connecting frame 403 and are meshed with each other;

[0069] In this embodiment, the right gear A6011 and the right gear B6021 are located in the U-shaped groove of the right connecting frame 403. Further, a right gear shaft A and a right gear shaft B (not shown in the figure) are provided in the U-shaped groove of the right connecting frame 403. The right gear A6011 is sleeved on the right gear shaft A, and the right gear B6021 is sleeved on the right gear shaft B. In this embodiment, the upper ends of the right gear shaft A and the right gear shaft B are respectively fixedly connected to the upper right panel, and the lower ends are fixedly connected to the lower right panel. The right gear A is rotationally matched with the right gear shaft A, and the right gear B is rotationally matched with the right gear shaft B; to limit the position of the gears.

[0070] In this embodiment, the lengths of the left link A501, left link B502, right link A601, and right link B602 are the same. The left end of the left link A501 is set to be arc-shaped, and a plurality of tooth grooves are formed on the outer periphery of the arc to form a gear structure. The left link A and the left gear A are integrally formed. The connections of the left link B and the left gear B, the right link A and the right gear A, and the right link B and the right gear B have the same structure.

[0071] The right end of the left link A501 is hinged to the left end of the right link A601 and is slidably engaged with the slide rail 1. The right end of the left link B502 is hinged to the left end of the right link B602 and is slidably engaged with the slide rail 1; to achieve the positioning of the positions of the left claw 3 and the right claw 4.

[0072] The lower end face of the left link A501 is stepped. The thickness on the right side of the left link A501 is smaller than that on the left side. The lower right connecting surface 5012 is formed on the lower right end face of the left link A501;

[0073] The upper end face of the right link A601 is stepped. The thickness on the left side of the right link A601 is smaller than that on the right side. The upper right connecting surface 6012 is formed on the upper left end face of the right link A601;

[0074] The upper end face of the left link B502 is stepped. The thickness on the right side of the left link B502 is smaller than that on the left side. The upper left connecting surface 5022 is formed on the upper right end face of the left link B502;

[0075] The lower end face of the right link B602 is stepped. The thickness on the left side of the right link B602 is smaller than that on the right side. The lower right connecting surface 6022 is formed on the lower left end face of the right link B602;

[0076] When the left claw 3 and the right claw 4 approach or separate from each other, the lower left connecting surface 5012 contacts the upper right connecting surface 6012, and the upper left connecting surface 5022 contacts the lower right connecting surface 6022;

[0077] To ensure that the positions of the left claw and the right claw are on the same horizontal plane and ensure the accuracy of centering.

[0078] This embodiment is also provided with a front pin shaft 7 and a rear pin shaft 8. The upper end of the front pin shaft 7 extends radially outward to form a front upper limit protrusion 701, and the lower end extends radially outward to form a front lower limit protrusion 702;

[0079] The upper end of the rear pin shaft 8 extends radially outward to form a rear upper limit protrusion 801, and the lower end extends radially outward to form a rear lower limit protrusion 802; to limit the link and the slide rail.

[0080] A chute 101 is formed along the length direction of the sliding rail 1. Pin holes for the supply shaft to pass through are respectively formed at the right end of the left connecting rod A501, the left end of the right connecting rod A601, the right end of the left connecting rod B502, and the left end of the right connecting rod B602. The front pin shaft 7 is located on the front side of the slider 2 and is inserted into the pin holes of the left connecting rod A501 and the right connecting rod A601 and the chute 101 (as can be seen from the attachment Figure 2 that the front pin shaft 7 sequentially passes through the chute 101, the pin hole on the left connecting rod A501, and the pin hole on the right connecting rod A601 from top to bottom, and the front upper limit protrusion 701 abuts against the chute 101, and the front lower limit protrusion 702 abuts against the lower part of the right connecting rod A601), and the rear pin shaft 8 is located on the rear side of the slider 2 and is inserted into the pin holes of the left connecting rod B502 and the right connecting rod B602 and the chute 101 (as can be seen from the attachment Figure 2 that the rear pin shaft 8 sequentially passes through the chute 101, the pin hole on the right connecting rod B602, and the pin hole on the left connecting rod B502 from top to bottom, and the rear upper limit protrusion 801 abuts against the chute 101, and the rear lower limit protrusion 802 abuts against the lower part of the left connecting rod B502);

[0081] The connection between the left connecting rod mechanism and the right connecting rod mechanism is realized, driving the left claw 3 and the right claw 4 to approach or move away from each other relatively.

[0082] When the utility model is used for centering flat parts such as steel plates and channel steels (as shown in Figure 3 ):

[0083] 1. Place the steel plate 9 (or channel steel) between the left limit plate 301 and the right limit plate 401;

[0084] 2. Tighten the left claw 3 and the right claw 4. The left claw 3 moves to the right so that the inner end surface of the left limit plate 301 abuts against the left side surface 901 of the steel plate, and the right claw 4 moves to the left so that the inner end surface of the right limit plate 401 abuts against the right side surface 902 of the steel plate. At this time, the front pin shaft 7 moves forward in the chute 101, and the rear pin shaft 8 moves backward in the chute 101;

[0085] 3. After the left limit plate and the right limit plate are tightened, insert a marker pen into the marking center hole 201 of the slider 2, and move the slider 2 along the sliding rail 1 so that the marker pen makes a mark along the length direction of the sliding rail 1, and this trajectory is the central axis of the steel plate.

[0086] When the utility model is used for centering a flange (as shown in Figure 4 ), it is also applicable to other parts with evenly distributed holes:

[0087] 1. Adjust the positions of the left claw 3 and the right claw 4. The left limit post 302 is inserted into the evenly distributed hole a1001 of the flange 10, and the right limit post 402 is inserted into the adjacent evenly distributed hole b1002. At this time, the sliding rail 1 is located at the central position between the two evenly distributed holes;

[0088] 2. Insert the marker pen into the marking center hole 201 of the slider 2, and move the slider 2 along the slide rail 1 so that the marker pen makes a mark along the length direction of the slide rail 1, and this trajectory is the center line A;

[0089] 3. Insert the left limit post 302 into the equally distributed hole b1002 of the flange 10, and insert the right limit post 402 into the equally distributed hole c1003 of the flange 10. At this time, the slide rail 1 is located at the center position of the two equally distributed holes;

[0090] 4. Insert the marker pen into the marking center hole 201 of the slider 2, and move the slider 2 along the slide rail 1 so that the marker pen makes a mark along the length direction of the slide rail 1, and this trajectory is the center line B;

[0091] 5. The intersection point of the center line A and the center line B is the rotation center of the flange.

[0092] When centering the steel pipe in the utility model:

[0093] 1. Place the steel pipe between the left limit plate 301 and the right limit plate 401;

[0094] 2. Tighten the left claw 3 and the right claw 4. The inner end faces of the left limit plate 301 and the right limit plate 401 respectively abut against the outer wall of the steel pipe. At this time, the front pin shaft 7 moves forward in the chute 101, and the rear pin shaft 8 moves backward in the chute 101;

[0095] 3. After the left limit plate and the right limit plate are tightened, insert the marker pen into the marking center hole 201 of the slider 2, and move the slider 2 along the slide rail 1 so that the marker pen makes a mark along the length direction of the slide rail 1, and this trajectory is the radial center line A of the steel pipe;

[0096] 4. Rotate the steel pipe or the centering device. The inner end faces of the left limit plate 301 and the right limit plate 401 still respectively abut against the outer wall of the steel pipe. Insert the marker pen into the marking center hole 201 of the slider 2 again, and move the slider 2 along the slide rail 1 so that the marker pen makes a mark along the length direction of the slide rail 1, and this trajectory is the radial center line B of the steel pipe;

[0097] 5. The intersection point of the radial center line A and the radial center line B is the rotation center of the steel pipe.

[0098] Embodiment 2:

[0099] The difference between Embodiment 2 and Embodiment 1 is that the left end of the left connecting rod A501 is hinged to the left end of the left connecting rod B502 at the left connecting frame 303 position, and the right end of the right connecting rod A601 is hinged to the right end of the right connecting rod B602 at the right connecting frame 403 position to realize the mutual approach and separation of the left claw and the right claw.

[0100] Specifically, a vertically arranged left rotating shaft is fixed in the U-shaped groove of the left connecting frame 303. Rotating shaft holes are respectively provided at the left ends of the left connecting rod A 501 and the left connecting rod B 502. The left connecting rod A 501 and the left connecting rod B 502 are sleeved on the left rotating shaft through the rotating shaft holes and are in rotational cooperation with the left rotating shaft; a vertically arranged right rotating shaft is fixed in the U-shaped groove of the right connecting frame 403. Rotating shaft holes are respectively provided at the right ends of the right connecting rod A 601 and the right connecting rod B 602. The right connecting rod A 601 and the right connecting rod B 602 are sleeved on the right rotating shaft through the rotating shaft holes and are in rotational cooperation with the right rotating shaft.

Claims

1. A quick centering device, characterized in that: It includes a slide rail, a slider, a left clamping claw, a right clamping claw, a left connecting rod mechanism and a right connecting rod mechanism, wherein the slide rail is arranged between the left connecting rod mechanism and the right connecting rod mechanism, and the slider is slidably matched with the slide rail; The left claw and the right claw are arranged opposite to each other, one end of the left connecting rod mechanism cooperates with the left claw, and the other end cooperates with the slide rail in a sliding manner, and one end of the right connecting rod mechanism cooperates with the right claw, and the other end cooperates with the slide rail in a sliding manner; The left clamping claw and the right clamping claw are matched with each other by the left connecting rod mechanism and the right connecting rod mechanism to approach and move away from each other.

2. The quick centering device according to claim 1, characterized in that: A marking center hole is provided at the center of the sliding block.

3. A quick centering device according to claim 1 or 2, characterized in that: The left clamping claw comprises a left connecting frame, a left limiting plate and a left limiting column, wherein the left connecting frame has a left limiting plate fixed at the upper end and a left limiting column fixed at the lower end; The right clamping claw comprises a right connecting frame, a right limiting plate and a right limiting column. The upper end of the right connecting frame is fixed with the right limiting plate, and the lower end is fixed with the right limiting column.

4. The quick centering device according to claim 3, wherein: The left connecting frame includes a left upper panel, a left side panel and a left lower panel, the left upper panel and the left lower panel are arranged opposite to each other up and down, the upper end of the left side panel is fixedly connected to the left end of the left upper panel, and the lower end is fixedly connected to the left end of the left lower panel, and the left upper panel, the left lower panel and the left side panel form a U-shaped groove structure with an opening facing the slide rail; The right connecting frame includes a right upper panel, a right side panel and a right lower panel. The right upper panel and the right lower panel are arranged opposite to each other up and down. The upper end of the right side panel is fixedly connected to the right end of the right upper panel, and the lower end is fixedly connected to the right end of the right lower panel. The right upper panel, the right lower panel and the right side panel form a U-shaped groove structure with an opening facing the slide rail.

5. The quick centering device according to claim 4, characterized in that: The left connecting rod mechanism comprises a left connecting rod A and a left connecting rod B, the left end of the left connecting rod A is provided with a left gear A, the left end of the left connecting rod B is provided with a left gear B, and the left gear A and the left gear B are arranged at the left connecting frame and meshed with each other; The right connecting rod mechanism comprises a right connecting rod A and a right connecting rod B, the right end of the right connecting rod A is provided with a right gear A, the right end of the right connecting rod B is provided with a right gear B, the right gear A and the right gear B are arranged at the right connecting frame and meshed with each other; The right end of the left connecting rod A is hinged to the left end of the right connecting rod A and slides with the slide rail, and the right end of the left connecting rod B is hinged to the left end of the right connecting rod B and slides with the slide rail.

6. The quick centering device according to claim 5, wherein: The left gear A and the left gear B are located in the U-shaped groove of the left connecting frame, and the left gear shaft A and the left gear shaft B are arranged in the U-shaped groove of the left connecting frame, the left gear A is sleeved on the left gear shaft A, and the left gear B is sleeved on the left gear shaft B; The right gear A and the right gear B are located in the U-shaped groove of the right connecting frame. The right gear shaft A and the right gear shaft B are provided in the U-shaped groove of the right connecting frame. The right gear A is sleeved on the right gear shaft A, and the right gear B is sleeved on the right gear shaft B.

7. A quick centering device according to claim 5 or 6, characterized in that: The lower end surface of the left connecting rod A is stepped, the thickness of the right side of the left connecting rod A is less than the thickness of the left side, and the lower end surface of the right side of the left connecting rod A forms a lower left connecting surface; The upper end surface of the right connecting rod A is stepped, the thickness of the left side of the right connecting rod A is less than the thickness of the right side, and the upper end surface of the left side of the right connecting rod A forms a right upper connecting surface; The upper end face of the left connecting rod B is stepped, the thickness of the right side of the left connecting rod B is smaller than that of the left side, and the upper end face of the right side of the left connecting rod B forms an upper left connecting surface; The lower end face of the right connecting rod B is stepped, the thickness of the left side of the right connecting rod B is smaller than that of the right side, and the lower end face of the left side of the right connecting rod B forms a lower right connecting surface; When the left claw and the right claw approach or separate from each other, the lower left connecting surface contacts the upper right connecting surface, and the upper left connecting surface contacts the lower right connecting surface.

8. A quick centering device according to claim 7, characterized in that: A front pin shaft and a rear pin shaft are further provided. A chute is formed in the sliding rail along its length direction. Pin holes for the pin shaft to pass through are formed at the right end of the left connecting rod A, the left end of the right connecting rod A, the right end of the left connecting rod B, and the left end of the right connecting rod B. The front pin shaft is located on the front side of the slider and is inserted into the pin holes of the left connecting rod A and the right connecting rod A and the chute. The rear pin shaft is located on the rear side of the slider and is inserted into the pin holes of the left connecting rod B and the right connecting rod B and the chute.

9. The quick centering device according to claim 8, wherein: The upper end of the front pin shaft extends radially outward to form a front upper limiting projection, and the lower end extends radially outward to form a front lower limiting projection; The upper end of the rear pin shaft extends radially outward to form a rear upper limiting projection, and the lower end extends radially outward to form a rear lower limiting projection.

10. A quick centering device according to claim 3, characterized in that: The left connecting rod mechanism includes a left connecting rod A and a left connecting rod B. The left end of the left connecting rod A is hinged to the left end of the left connecting rod B at the left connecting frame position. The right connecting rod mechanism includes a right connecting rod A and a right connecting rod B. The right end of the right connecting rod A is hinged to the right end of the right connecting rod B at the right connecting frame position.

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