A self-centering indexing fixture

Abstract

This utility model relates to a self-centering indexing fixture, comprising a first disk, a first cylindrical protrusion at the top center of the first disk, an end face bearing sleeved on the first cylindrical protrusion, the bottom end face of the end face bearing being in contact with the top end face of the first disk; a first ring sleeved on the bottom end of the end face bearing, a plurality of connecting rods evenly arranged axially on the outer side of the first ring, a plurality of first oblong holes evenly arranged axially on the top of the first ring, the number of first oblong holes corresponding to the number of connecting rods; the bottom end face of the second disk being in contact with the top end face of the connecting rods, a second circular hole opened at the top center of the second disk, the second disk being sleeved on the top end of the end face bearing, and a third disk fixedly installed on the top of the second disk, solving the problem of workpiece centering being difficult to determine due to workpiece processing errors and mechanical vibration, and realizing automatic positioning of the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a self-centering indexing fixture. Background Technology

[0002] The machining of industrial parts usually requires the use of jigs for positioning and centering, such as for secondary machining on regular rings, drilling holes or welding some features.

[0003] The existing technical solutions have the following drawbacks: During the processing, the parts to be processed in batch production have different appearance dimensions. In traditional fixtures, positioning and centering need to be repeatedly adjusted and processed one by one, which increases the time cost. Existing fixtures that can automatically align and center parts usually have a relatively complex structure and require strict technical skills from front-line operators. Utility Model Content

[0004] The purpose of this invention is to provide a self-centering indexing fixture to solve the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A self-centering indexing fixture includes a first disk with a first cylindrical protrusion at its top center and an end-face bearing fitted onto the protrusion, the bottom end face of which is in contact with the top end face of the first disk; a first ring fitted onto the bottom end of the end-face bearing, with multiple connecting rods evenly arranged axially on the outer side of the first ring and multiple first oblong holes evenly arranged axially on the top of the first ring, the number of which corresponds to the number of connecting rods; a second disk located on top of the first ring, the axes of the first disk, the first ring, and the second disk being collinear, the bottom end face of the second disk in contact with the top end face of the connecting rods, a second circular hole at the top center of the second disk, the second disk fitted onto the top end face bearing, and a third disk fixedly mounted on top of the second disk, the third disk being coaxial with the second disk and the top end face of the end-face bearing in contact with the bottom end face of the third disk.

[0007] By adopting the above technical solution, the self-centering fixture, through its unique design, achieves automatic positioning of the workpiece, solving the problem that the center of the workpiece is difficult to determine due to workpiece processing errors and mechanical vibrations, which previously required repeated manual adjustments to find the center. This technical solution significantly improves processing efficiency and accuracy.

[0008] In a further embodiment, the top of the first cylindrical protrusion is provided with a first circular hole that runs vertically through it, and the axis is vertically aligned. The bottom of the first disk is provided with an internal hexagonal hole, and the axis of the internal hexagonal hole is vertically collinear with the axis of the first circular hole.

[0009] By adopting the above technical solution, the installation of the entire self-centering indexing fixture is made more convenient by setting an internal hexagonal hole at the bottom of the first disk. After installation, the bolts are not exposed at the bottom of the first disk, so that the bottom of the first disk remains a plane.

[0010] In a further embodiment, the bottom of the second disk has a plurality of downwardly oriented protrusions evenly distributed axially, the number of which corresponds to the number of connecting rods. The top of the second disk has a plurality of axially oriented grooves evenly distributed axially, the number of which corresponds to the number of connecting rods. Each groove has a third circular hole extending vertically through it, and its axis is vertically oriented. A round rod is slidably installed within each groove, and the groove is used to limit the sliding direction of the square rod, which is centrifugal / centripetal.

[0011] By adopting the above technical solution and setting a protruding structure, a limiting function is achieved, ensuring that the connecting rod welded to the outer side of the first ring has a precise displacement. A sliding groove is provided to restrict the movement direction of the square rod.

[0012] In a further embodiment, the top of the centripetal end of the square rod is provided with a fourth circular hole that runs vertically through it, and a round rod is inserted into the fourth circular hole. The bottom end of the round rod extends downward into a first waist-shaped hole at a corresponding position. The top of the centripetal end is provided with a second waist-shaped hole that runs vertically through it, and the bottom end of the round rod extends downward into a second waist-shaped hole at a corresponding position. The centrifugal end of the square rod is provided with an arc-shaped rectangular protrusion, and the top of the arc-shaped rectangular protrusion is provided with a U-shaped groove.

[0013] By adopting the above technical solution, the round rod is inserted into the second oblong hole, which allows the square rod to move centrifugally / centripetally within the groove. The arc-shaped rectangular protrusion at the centrifugal end of the square rod can better fix the round workpiece in a more snug fit.

[0014] In a further embodiment, a downward-facing second cylindrical protrusion is provided at the bottom center of the third disk, the second cylindrical protrusion being coaxial with the first cylindrical protrusion, and the top end of the end face bearing being sleeved on the bottom end of the second cylindrical protrusion.

[0015] By adopting the above technical solution, the first cylindrical protrusion and the second cylindrical protrusion are simultaneously located within the end face bearing, enabling the first disk and the third disk to be better installed.

[0016] In a further embodiment, the bottom of the second cylindrical protrusion is provided with a fifth circular hole that runs vertically through the top and bottom, and the axis is vertically arranged. The top of the third disk is provided with a sixth circular hole, and the axis is vertically arranged. The axes of the fifth circular hole and the sixth circular hole are collinear.

[0017] By adopting the above technical solution, the installation of the entire self-centering indexing fixture is made more convenient by setting an internal hexagonal hole on the top of the third disk. After installation, the bolts are not exposed on the top of the third disk, so that the bottom of the third disk remains a flat plane.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. By setting the groove on the second disc, the square rod can be made to repeatedly move centrifugally / centripetally within the groove;

[0020] 2. The first oblong hole of the first ring can simultaneously control the centrifugal / centripetal movement of the square rod, thereby tightening / clamping the workpiece;

[0021] 3. The U-shaped groove at the top of the arc-shaped rectangular protrusion at the centrifugal end of the square rod makes it easier to evenly distribute the workpiece and facilitates welding during operation. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of the present invention, used to illustrate the structural connection relationship between the discs and the square rods;

[0023] Figure 2 This is a schematic diagram illustrating the top of the first disk and the structure of the first ring.

[0024] Figure 3 This is a schematic diagram illustrating the bottom structure of the first disk;

[0025] Figure 4 This is a schematic diagram illustrating the top structure of the second disk;

[0026] Figure 5 This is a schematic diagram illustrating the bottom structure of the second disk;

[0027] Figure 6 This is a schematic diagram illustrating the top structure of the third disk;

[0028] Figure 7 This is a schematic diagram illustrating the bottom structure of the third disk;

[0029] Figure 8 This is a schematic diagram used to illustrate the overall structure of the square rod.

[0030] In the figure, 1. First disk; 2. First cylindrical protrusion; 3. End face bearing; 4. First ring; 5. Connecting rod; 6. First oblong hole; 7. Second disk; 8. Second circular hole; 9. Third disk; 10. Second cylindrical protrusion; 11. Protrusion; 12. Slide groove; 13. Square rod; 14. Second oblong hole; 15. Arc-shaped rectangular protrusion. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0033] Example 1:

[0034] like Figures 1-8As shown, a self-centering indexing fixture includes a first cylindrical protrusion 2 at the top center of a first disk 1, on which an end-face bearing 3 is fitted, with the bottom end face of the end-face bearing 3 fitting against the top end face of the first disk 1; a first ring 4 is fitted onto the bottom end of the end-face bearing, with multiple connecting rods 5 evenly arranged axially on the outer side of the first ring 4, and multiple first oblong holes 6 evenly arranged axially on the top of the first ring 4, the number of first oblong holes 6 corresponding to the number of connecting rods 5; a second disk 7 is located on top of the first ring 4, and the axes of the first disk 1, the first ring 4, and the second disk 7 are all collinear, with the bottom end face of the second disk 7 fitting against the connecting rods 5. The top surface of the first cylindrical protrusion 2 is fitted together with the second circular hole 8 at the center of the top of the second disc 7. The second disc 7 is sleeved on the top of the end bearing 3 and the third disc 9. The third disc 9 is fixedly installed on the top of the second disc 7. The third disc 9 is coaxial with the second disc 7 and the top surface of the end bearing 3 is fitted with the bottom surface of the third disc 9. The top of the first cylindrical protrusion 2 is provided with a first circular hole that runs vertically through the top and bottom, and the axis is set vertically. The bottom of the first disc is provided with an internal hexagonal hole, and the axis of the internal hexagonal hole is vertically collinear with the axis of the first circular hole. The bottom of the second disc 7 is axially evenly provided with multiple downward protrusions 11, and the number of protrusions 11 corresponds to the number of connecting rods 5. The top of the second disc 7 is axially and evenly provided with multiple sliding grooves 12, the number of which is the same as the number of connecting rods 5. Each sliding groove has a third circular hole that extends vertically through it, and the axis is vertically set. A round rod is slidably installed in each sliding groove 12. The sliding groove 12 is used to limit the sliding direction of the square rod 13. The sliding direction of the square rod 13 is centrifugal / centripetal. The top of the centripetal end of the square rod 13 has a fourth circular hole that extends vertically through it, and a round rod is inserted into the fourth circular hole. The bottom end of the round rod extends downward into the corresponding first waist-shaped hole 6. The top of the centripetal end has a second waist-shaped hole 14 that extends vertically through it, and the bottom end of the round rod extends downward into the first waist-shaped hole 6. The square rod 13 extends downward into the corresponding position of the second waist-shaped hole. The centrifugal end of the square rod 13 is provided with an arc-shaped rectangular protrusion 15. The top of the arc-shaped rectangular protrusion is provided with a U-shaped groove. The bottom center of the third disc 9 is provided with a downward-facing second cylindrical protrusion 10. The second cylindrical protrusion 10 is coaxial with the first cylindrical protrusion 2. The top of the end face bearing 3 is sleeved on the bottom of the second cylindrical protrusion 10. The bottom of the second cylindrical protrusion 10 is provided with a fifth circular hole that runs vertically through the top and bottom, and the axis is set vertically. The top of the second disc 7 is provided with a sixth circular hole, and the axis is set vertically. The axes of the fifth circular hole and the sixth circular hole are collinear.

[0035] Specific implementation process: The self-centering indexing fixture is placed horizontally, and the workpiece to be welded is placed horizontally on the top of the third disc 9. Since the fourth round hole on the square rod 13 is fixedly connected to the first waist-shaped hole 6 by a round rod, and the second waist-shaped hole 14 on the square rod 13 is fixedly connected to the third round hole on the slide groove 12 by a round rod, the connecting rod 5 welded on the first ring 4 is rotated, causing the first ring 4 to rotate. The two round rods on the square rod 13 will move along the first waist-shaped hole 6 and the second waist-shaped hole 14, thereby driving the square rod 13 to make repeated centrifugal / centripetal movements in the slide groove 12. The workpiece is tightened / clamped by the centrifugal / centripetal movement of the arc-shaped rectangular protrusion 15 on the square rod 13, so that the center of the workpiece is coaxial and collinear with the center of the self-centering indexing fixture. At this time, the workpiece is aligned by the U-shaped groove at the top of the arc-shaped rectangular protrusion 15 on the square rod 13, thereby dividing the workpiece into four equal parts, making it convenient and quick to weld four small cylinders.

[0036] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0037] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A self-centering indexing fixture, characterized in that, include: The first disk (1) has a first cylindrical protrusion (2) at the top center position, and an end face bearing (3) is sleeved on the first cylindrical protrusion (2). The bottom end face of the end face bearing (3) is in contact with the top end face of the first disk (1). The first ring (4) is sleeved on the bottom end of the end face bearing. Multiple connecting rods (5) are evenly arranged on the outer side of the first ring (4) and multiple first waist-shaped holes (6) are evenly arranged on the top of the first ring (4). The number of first waist-shaped holes (6) corresponds to the number of connecting rods (5). The second disk (7) is located at the top of the first ring (4). The axes of the first disk (1), the first ring (4), and the second disk (7) are all collinear. The bottom end face of the second disk (7) is in contact with the top end face of the connecting rod (5). A second circular hole (8) is provided at the center of the top of the second disk (7). The second disk (7) is sleeved on the top end of the end face bearing (3). The third disk (9) is fixedly installed on the top of the second disk (7). The third disk (9) is coaxial with the second disk (7) and the top surface of the end face bearing (3) is in contact with the bottom surface of the third disk (9).

2. The self-centering indexing fixture according to claim 1, characterized in that: The first cylindrical protrusion (2) has a first circular hole that runs vertically through the top and the axis is vertically set. The bottom of the first disk has an internal hexagonal hole, and the axis of the internal hexagonal hole is vertically collinear with the axis of the first circular hole.

3. The self-centering indexing fixture according to claim 1, characterized in that: The bottom of the second disc (7) is provided with a plurality of downward protrusions (11) evenly arranged axially. The number of protrusions (11) corresponds to the number of connecting rods (5). The top of the second disc (7) is provided with a plurality of sliding grooves (12) evenly arranged axially. The number of sliding grooves (12) is the same as the number of connecting rods (5). The sliding groove is provided with a third circular hole that runs through the top and bottom, and the axis is set vertically. A round rod is slidably installed in each sliding groove (12). The sliding groove (12) is used to limit the sliding direction of the square rod (13). The sliding direction of the square rod (13) is centrifugal / centripetal.

4. The self-centering indexing fixture according to claim 3, characterized in that: The top of the centripetal end of the square rod (13) is provided with a fourth circular hole that runs vertically through it. A round rod is inserted into the fourth circular hole. The bottom end of the round rod extends downward into the first waist-shaped hole (6) at the corresponding position. The top of the centripetal end is provided with a second waist-shaped hole (14) that runs vertically through it. The bottom end of the round rod extends downward into the second waist-shaped hole at the corresponding position. The centrifugal end of the square rod (13) is provided with an arc-shaped rectangular protrusion (15). The top of the arc-shaped rectangular protrusion is provided with a U-shaped groove.

5. A self-centering indexing fixture according to claim 1, characterized in that: The bottom center of the third disk (9) is provided with a downward-facing second cylindrical protrusion (10), the second cylindrical protrusion (10) is coaxial with the first cylindrical protrusion (2), and the top end of the end face bearing (3) is sleeved on the bottom end of the second cylindrical protrusion (10).

6. A self-centering indexing fixture according to claim 5, characterized in that: The bottom of the second cylindrical protrusion (10) is provided with a fifth circular hole that runs vertically through it, and the axis is set vertically. The top of the second disk (7) is provided with a sixth circular hole, and the axis is set vertically. The axes of the fifth circular hole and the sixth circular hole are collinear.

Images