Concentric assembly structure of pneumatic rotary chuck

Abstract

The utility model relates to a concentric assembly structure of a pneumatic rotary chuck, which comprises a chuck body used for installing a clamping jaw. The bottom of the rotary table fixing disc is connected with a hollow rotary table, and the upper part of the rotary table fixing disc is coaxially assembled with the bottom of the chuck body; and the positioning cylinder is arranged in the inner hole of the hollow rotary table, the bottom of the positioning cylinder is coaxially assembled with the rotating part of the pneumatic slip ring, and the upper part of the positioning cylinder is connected with the bottom side of the rotary table fixing disc and is coaxially assembled with the rotary table fixing disc. By optimizing the connecting structure, the coaxiality between the upper part and the lower part is improved, the supporting rigidity is better, and the chuck body rotates more stably relative to the pneumatic sliding ring fixing part.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic chuck technology, specifically to a concentric assembly structure for a pneumatic rotary chuck. Background Technology

[0002] A pneumatic three-jaw chuck is a clamping device driven by a pneumatic system, widely used in machining, automated production lines, and other fields, mainly for quickly clamping cylindrical or symmetrical workpieces. For example, a rotary pneumatic clamping operating table disclosed in patent announcement number CN220699357U has a fixed platform fixedly installed at the bottom of the worktable. A servo motor is fixedly installed on one side of the fixed platform. A rotating platform is rotatably connected inside the fixed platform. A fixed plate is fixedly installed on one side of the rotating platform, and a three-jaw cylinder is fixedly installed on the top of the fixed plate. An air slip ring is fixedly installed on one side of the fixed platform, and a connecting frame is fixedly installed on the top of the air slip ring. The connecting frame allows the air slip ring to rotate on one side when the rotating platform rotates, thus preventing it from being restricted from free rotation due to pipeline layout. The connecting frame is roughly a U-shaped frame. The two vertical plates on both sides of the U-shaped frame are connected to the fixed plate. The cross plate at the bottom of the U-shaped frame is connected to the rotating part of the air slip ring by screws. In actual use, it was found that the U-shaped frame is prone to deformation after a period of use as a connecting part, which leads to poor coaxiality between the upper and lower assembled parts and affects the stability of rotation. Utility Model Content

[0003] The purpose of this invention is to provide a concentric assembly structure for a pneumatic rotary chuck, which solves the problem of poor coaxiality through structural optimization.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A concentric assembly structure for a pneumatic rotary chuck, including a chuck body for mounting grippers;

[0006] The bottom of the rotary table is used to connect with the hollow rotary table, and the top is coaxially assembled with the bottom of the chuck body.

[0007] The positioning cylinder is installed in the inner hole of the hollow rotary table. Its bottom is coaxially assembled with the rotating part of the pneumatic slip ring, and its upper part is connected to the bottom side of the rotary table fixing plate and coaxially assembled with the rotary table fixing plate.

[0008] Furthermore, the turntable fixing plate has a through hole corresponding to the inner hole, the turntable fixing plate has a positioning protrusion on the outer edge of the through hole, and the bottom of the chuck body has a positioning groove.

[0009] Furthermore, the upper side of the turntable fixed plate is provided with a cable outlet groove, which passes through the positioning protrusion radially along the turntable fixed plate. The cable outlet groove is for the movable air pipe of the pneumatic rotary chuck to pass through, and the movable air pipe is used to connect the rotating part of the pneumatic slip ring to the chuck body.

[0010] Furthermore, the turntable fixing plate is provided with a set of first bolt holes and a set of second bolt holes on the outer periphery of the through hole. The first bolt holes are for the first bolts connecting the chuck body and the turntable fixing plate to pass through, and the second bolt holes are for the second bolts connecting the hollow rotary table and the turntable fixing plate to pass through.

[0011] Furthermore, the lower side of the turntable fixing plate is provided with a first positioning notch for positioning, and the first positioning notch is provided with a threaded hole. The upper end of the positioning cylinder is provided with a first positioning part, which is inserted into the first positioning notch. The first positioning part is provided with a third bolt hole, which is corresponding to the threaded hole.

[0012] Furthermore, the positioning cylinder includes a cylindrical section extending vertically and a connecting plate. The first positioning part is located on the outer edge of the connecting plate, and the center of the connecting plate has a through hole for the movable air tube of the pneumatic rotary chuck to pass through.

[0013] Furthermore, the outer edge of the connecting plate is provided with a plurality of second positioning parts, which are spaced apart from the first positioning parts in the circumferential direction. The upper end of the cylinder is provided with a plurality of second positioning notches, which are inserted into the second positioning notches. The second positioning parts are provided with fourth bolt holes for the fourth bolts to pass through. The connecting plate and the rotating part of the pneumatic slip ring are connected by the fourth bolts.

[0014] Furthermore, the first positioning part and the second positioning part are formed by ear plates protruding from the outer periphery of the cylinder, and the length of the second positioning part is less than the length of the first positioning part.

[0015] Furthermore, the fixed part of the pneumatic slip ring is connected to a support plate.

[0016] The beneficial effects of this utility model are:

[0017] This invention employs a positioning cylinder and a rotating part of a pneumatic slip ring for positioning and then connection. This not only achieves coaxial positioning but also provides better support rigidity, resistance to deformation, and improved stability. The upper part of the positioning cylinder is also coaxially assembled with the turntable fixing plate and is equipped with a positioning structure, further enhancing the coaxiality of the different components. Attached Figure Description

[0018] Figure 1 This is a perspective view of the concentric assembly structure of the pneumatic rotary chuck of this utility model;

[0019] Figure 2 yesFigure 1 Sectional view of AA;

[0020] Figure 3 yes Figure 1 Exploded view of the partial structure shown;

[0021] Figure 4 This is a schematic diagram showing the relative positions of the turntable fixed plate and the chuck body before they are engaged.

[0022] Figure 5 It is a 3D view of the connecting plate;

[0023] Figure 6 It is a three-dimensional diagram of a cylinder.

[0024] 1. Hollow rotary table; 11. Turntable; 12. Servo motor; 13. Inner hole; 2. Gripper; 3. Chuck body; 31. Air connector hole; 32. Positioning groove; 4. Turntable fixing plate; 41. Second bolt hole; 42. First bolt hole; 43. First positioning notch; 44. Cable outlet groove; 45. Positioning protrusion; 5. Pneumatic slip ring; 51. Rotating part; 6. Support plate; 7. Fixed air pipe; 81. Cylinder; 811. Annular stepped groove; 812. Second positioning notch; 82. Connecting plate; 821. First positioning part; 822. Third bolt hole; 823. Second positioning part; 824. Fourth bolt hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0026] Embodiments of this utility model:

[0027] like Figures 1-6 As shown, the concentric assembly structure of the pneumatic rotary chuck includes a chuck body 3 for mounting three grippers 2. The pneumatic principle is used to achieve the synchronous movement of the three grippers 2. The principle belongs to the prior art. The main purpose of this utility model is to solve the problem of coaxial assembly.

[0028] The rotary table fixing plate 4 has its bottom for connection with the hollow rotary table 1 and its upper part coaxially assembled with the bottom of the chuck body 3. The hollow rotary table 1, also known as a hollow rotary platform, is existing technology. The hollow rotary table 1 includes a mounting part and a turntable 11. The mounting part has flange holes for connection with the equipment body, such as a laser cutting machine. A servo motor 12 is provided on one side of the mounting part. The servo motor 12 drives the turntable 11 to rotate through a transmission structure, thereby driving the chuck body 3 to rotate.

[0029] like Figures 3-4 As shown, the turntable fixing plate 4 has a through hole corresponding to the inner hole 13. The turntable fixing plate 4 has a positioning protrusion 45 on the outer edge of the through hole, and the bottom of the chuck body 3 has a positioning groove 32, which is a shallow circular groove. The positioning protrusion 45 is an arc-shaped protrusion that extends into the positioning groove 32 during installation. The outer diameter of the positioning protrusion 45 matches the inner diameter of the positioning groove 32.

[0030] The upper side of the turntable fixing plate 4 is provided with a cable outlet groove 44. Three cable outlet grooves 44 are distributed around the circumference of the turntable fixing plate 4 and radially penetrate the positioning protrusion 45. The cable outlet groove 44 allows the movable air pipe (not shown) of the pneumatic rotary chuck to pass through. The movable air pipe is used to connect the rotating part 51 of the pneumatic slip ring 5 to the chuck body 3, providing pressurized gas to the chuck body 3. In this embodiment, the air pipe is defined as two parts: one part is the fixed air pipe 7 connected to the fixed part of the pneumatic slip ring 5, and the other part is the movable air pipe connected to the rotating part 51 of the pneumatic slip ring 5. The movable air pipe rotates with the rotating part 51 to avoid pipe entanglement. After extending upward from the through hole of the turntable fixing plate 4, the movable air pipe extends out from the cable outlet groove 44 and then connects upward to the air connector hole 31 on the chuck body 3. In this embodiment, there are two air connector holes 31. Figure 1 (1 is marked in the middle) to realize air intake and exhaust.

[0031] The turntable mounting plate 4 has a set of first bolt holes 42 and a set of second bolt holes 41 on the outer periphery of the through hole. The first bolt holes 42 are for the first bolts connecting the chuck body 3 and the turntable mounting plate 4 to pass through, and the second bolt holes 41 are for the second bolts connecting the hollow rotary table 1 and the turntable mounting plate 4 to pass through. The first bolt holes 42 are closer to the through hole of the turntable mounting plate 4 than the second bolt holes 41.

[0032] The positioning cylinder is installed in the inner hole 13 of the hollow rotary table 1. Its bottom is coaxially assembled with the rotating part 51 of the pneumatic slip ring 5, and its upper part is connected to the bottom side of the rotary table fixing plate 4 and coaxially assembled with the rotary table fixing plate 4.

[0033] like Figures 5-6 As shown, in this embodiment, the positioning cylinder adopts a split structure, comprising a cylindrical section 81 extending vertically and a connecting plate 82. Two first positioning portions 821 are symmetrically arranged on the outer edge of the connecting plate 82. Two first positioning notches 43 for positioning are provided on the lower side of the turntable fixing plate 4, each containing a threaded hole. The first positioning portions 821 are engaged with the first positioning notches 43. A third bolt hole 822 is provided on each first positioning portion 821, corresponding to the threaded hole, and the third bolt is used to connect the connecting plate 82 to the turntable fixing plate 4.

[0034] like Figure 5As shown, the connecting plate 82 has a perforation in the center for the movable air tube to pass through.

[0035] like Figures 5-6 As shown, the outer edge of the connecting plate 82 is also provided with several second positioning parts 823. The second positioning parts 823 and the first positioning parts 821 are spaced apart in the circumferential direction. The upper end of the cylinder 81 is provided with several second positioning notches 812, and the second positioning parts 823 are inserted into the second positioning notches 812. The second positioning parts 823 are provided with fourth bolt holes 824, through which fourth bolts pass. The fourth bolts are inserted into the cylinder 81 from top to bottom. The connecting plate 82 and the rotating part 51 of the pneumatic slip ring 5 are connected by the fourth bolts.

[0036] like Figure 5 As shown, the first positioning part 821 and the second positioning part 823 are formed by ear plates protruding from the outer periphery of the cylinder 81, and the length of the second positioning part 823 is less than the length of the first positioning part 821.

[0037] like Figure 3 As shown, the lower inner side of the cylinder 81 is provided with an annular stepped groove 811, which is used to abut against the rotating part 51 of the pneumatic slip ring 5. The upper end of the rotating part 51 extends into the annular stepped groove 811, which plays a certain role in coaxial positioning. During installation, positioning is performed first, and then the fourth bolt is used for connection. The cylinder 81 and the connecting plate 82 not only play a coaxial positioning role, but also have better support rigidity, are not easy to deform, and have better stability.

[0038] like Figure 1 As shown, the fixed part of the pneumatic slip ring 5 is connected to the support plate 6. One part of the support plate 6 is connected to the fixed part, and the other part is connected to the equipment base. When in use, the fixed part of the pneumatic slip ring 5 is stationary, and the rotating part 51 is rotatably assembled with the fixed part, which can realize the gas communication between the fixed air pipe 7 and the movable air pipe. The principle of the pneumatic slip ring 5 is also the existing technology.

[0039] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A concentric assembly structure for a pneumatic rotary chuck, characterized in that: It includes a chuck body for mounting grippers; a turntable fixing plate, the bottom of which is connected to a hollow rotary table, and the upper part is coaxially assembled with the bottom of the chuck body; and a positioning cylinder, which is inserted into the inner hole of the hollow rotary table, the bottom of which is coaxially assembled with the rotating part of the pneumatic slip ring, and the upper part is connected to the bottom side of the turntable fixing plate and coaxially assembled with the turntable fixing plate.

2. The concentric assembly structure of the pneumatic rotary chuck according to claim 1, characterized in that: The turntable fixing plate has a through hole corresponding to the inner hole, and the turntable fixing plate has a positioning protrusion on the outer edge of the through hole, and a positioning groove is provided on the bottom of the chuck body.

3. The concentric assembly structure of the pneumatic rotary chuck according to claim 2, characterized in that: The upper side of the turntable fixed plate is provided with a cable outlet groove, which passes through the positioning protrusion radially along the turntable fixed plate. The cable outlet groove is for the movable air pipe of the pneumatic rotary chuck to pass through. The movable air pipe is used to connect the rotating part of the pneumatic slip ring to the chuck body.

4. The concentric assembly structure of the pneumatic rotary chuck according to claim 2, characterized in that: The turntable fixing plate has a set of first bolt holes and a set of second bolt holes on the outer periphery of the through hole. The first bolt holes are for the first bolts connecting the chuck body and the turntable fixing plate to pass through, and the second bolt holes are for the second bolts connecting the hollow rotary table and the turntable fixing plate to pass through.

5. The concentric assembly structure of the pneumatic rotary chuck according to claim 1, characterized in that: The lower side of the turntable fixing plate is provided with a first positioning notch for positioning, and a threaded hole is provided in the first positioning notch. The upper end of the positioning cylinder is provided with a first positioning part, which is inserted into the first positioning notch. The first positioning part is provided with a third bolt hole, which is corresponding to the threaded hole.

6. The concentric assembly structure of the pneumatic rotary chuck according to claim 5, characterized in that: The positioning cylinder includes a cylindrical section extending vertically and a connecting plate. The first positioning part is located on the outer edge of the connecting plate, and the center of the connecting plate has a through hole for the movable air tube of the pneumatic rotary chuck to pass through.

7. The concentric assembly structure of the pneumatic rotary chuck according to claim 6, characterized in that: The outer edge of the connecting plate is also provided with a number of second positioning parts, which are spaced apart from the first positioning parts in the circumferential direction. The upper end of the cylinder is provided with a number of second positioning notches, which are inserted into the second positioning notches. The second positioning parts are provided with fourth bolt holes for the fourth bolts to pass through. The connecting plate and the rotating part of the pneumatic slip ring are connected by the fourth bolts.

8. The concentric assembly structure of the pneumatic rotary chuck according to claim 7, characterized in that: The first positioning part and the second positioning part are formed by ear plates protruding from the outer periphery of the cylinder, and the length of the second positioning part is less than the length of the first positioning part.

9. The concentric assembly structure of the pneumatic rotary chuck according to claim 1, characterized in that: The fixed part of the pneumatic slip ring is connected to a support plate.

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