A connecting rod type pneumatic hollow chuck structure

Abstract

The utility model discloses a connecting rod type pneumatic hollow chuck structure, including a chuck base, a chuck rotating disk is installed on one side of the chuck base, a first layer of connecting rod type pneumatic chuck mechanism is arranged on one side of the chuck rotating disk, the first layer of connecting rod type pneumatic chuck mechanism includes two symmetrical first double-axis cylinders, the telescopic end of the first double-axis cylinder is provided with a first push grab, a first roller is rotatably connected between the two first roller seats, a first slide bar is slidably connected between the two ends of the two first push grabs, a first connecting rod mechanism is arranged between the two ends of the two first push grabs, and a second connecting rod type pneumatic chuck mechanism is arranged above the first layer of connecting rod type pneumatic chuck mechanism; by using the connecting rod type pneumatic chuck mechanism, more precise motion control and workpiece clamping can be achieved. Even in the case where the movement speed of the cylinder piston rod is not synchronized, due to the design of the connecting rod structure, the influence of manufacturing errors on concentricity and processing accuracy can be reduced, thereby improving the processing accuracy of the workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic hollow chucks, in particular to a connecting rod type pneumatic hollow chuck structure. Background Art

[0002] A pneumatic hollow chuck is a device used to clamp a workpiece, often in industrial applications such as machining, assembly, and measurement. They feature a hollow design that allows a rod or tube to pass through the center for unrestricted access for machining or other operations while clamping. These chucks are actuated via a pneumatic system, using gas pressure to create the clamping force. When air pressure is applied to the inside of the chuck, the jaws or arms of the clamp retract, clamping the workpiece. Conversely, when the air pressure is released, the clamp releases, allowing the workpiece to be removed or repositioned.

[0003] However, in the traditional pneumatic hollow chuck structure, due to the manufacturing and installation errors of the cylinders, and the difficulty in completely synchronizing the movement speed of the cylinder piston rods, the piston rods of each pair of cylinders on the chuck cannot achieve strict synchronous movement. This asynchronous movement easily leads to low concentricity when clamping the workpiece, which in turn affects the machining accuracy and quality of the workpiece. Utility Model Content

[0004] In view of the above problems, the utility model provides a connecting rod type pneumatic hollow chuck structure, which effectively solves the problems.

[0005] The utility model adopts the following technical scheme: a connecting rod type pneumatic hollow chuck structure, comprising a chuck base, a chuck rotating disk is installed on one side of the chuck base, a first layer of connecting rod type pneumatic chuck mechanism is arranged on one side of the chuck rotating disk, the first layer of connecting rod type pneumatic chuck mechanism comprises two symmetrical first double-axis cylinders, the telescopic ends of the first double-axis cylinders are provided with first push grabs, two first roller seats are installed on one side of the first push grabs, a first roller is rotatably connected between the two first roller seats, a first slide bar is slidably connected between both ends of the two first push grabs, both ends of the first slide bar are rotatably connected with the first slide bar seats, the first slide bar seats are installed on the chuck rotating disk, a first connecting rod mechanism is arranged between both ends of the two first push grabs, and a second connecting rod type pneumatic chuck mechanism is arranged above the first layer of connecting rod type pneumatic chuck mechanism.

[0006] Furthermore, the first connecting rod mechanism includes two first connecting rod seats, the two first connecting rod seats are respectively installed at one end of the two first push grabs, the two first connecting rod seats are rotatably connected with the first connecting rod through a rotating shaft, the two first connecting rods are connected by a second connecting rod, both ends of the second connecting rod are rotatably connected to the two first connecting rods through a rotating shaft, the second connecting rod is rotatably connected with the first rotating shaft at the center, and the bottom of the first rotating shaft is connected to the chuck rotating disk.

[0007] Furthermore, the second connecting rod type pneumatic chuck mechanism includes two symmetrical second double-axis cylinders, the telescopic end of the second double-axis cylinder is provided with a second push grab, two second roller seats are installed on one side of the second push grab, a second roller is rotatably connected between the two second roller seats, a second slide bar is slidably connected between both ends of the two second push grabs, both ends of the second slide bar are rotatably connected with second slide bar seats, the second slide bar seats are installed on the chuck rotating disk through an elevation frame, and a second connecting rod mechanism is provided between both ends of the two second push grabs.

[0008] Furthermore, the second connecting rod mechanism includes two second connecting rod seats, and the two second connecting rod seats are respectively installed on one end of the two second push grabs, and the two second connecting rod seats are rotatably connected to the third connecting rod via a rotating shaft, and the two third connecting rods are connected by a fourth connecting rod, and both ends of the fourth connecting rod are rotatably connected to the two third connecting rods via a rotating shaft, and the second rotating shaft is rotatably connected at the center of the fourth connecting rod.

[0009] Furthermore, the bottom of the second rotating shaft is connected to the first double-shaft cylinder, and the top of the first rotating shaft is connected to the second double-shaft cylinder.

[0010] The advantage of the utility model is that by using a connecting rod type pneumatic chuck mechanism, more precise motion control and workpiece clamping can be achieved. Even when the movement speed of the cylinder piston rod is not synchronized, the design of the connecting rod structure can reduce the influence of manufacturing errors on concentricity and processing accuracy, thereby improving the processing accuracy of the workpiece. The connecting rod structure provides a more stable way of supporting and transmitting force, making the chuck more stable and reliable during operation. This can reduce the degree of wear of mechanical parts, extend the service life of the chuck, and reduce production downtime caused by mechanical failure. Since two sets of jaws are clamped separately, when clamping a rectangular tube, the four-jaw synchronous chuck can better clamp the rectangular tube, and has strong versatility and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the first-layer connecting rod type pneumatic chuck mechanism structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the second-layer connecting rod type pneumatic chuck mechanism structure of the utility model.

[0014] In the figure, 1-chuck base, 2-chuck rotating disk, 3-first layer connecting rod type pneumatic chuck mechanism, 4-second connecting rod type pneumatic chuck mechanism, 31-first double-axis cylinder, 32-first push grab, 33-first roller seat, 34-first roller, 35-first slide bar, 36-first slide bar seat, 37-first connecting rod mechanism, 371-first connecting rod seat, 372-first connecting rod, 373-second connecting rod, 374-first rotating axis, 41-second double-axis cylinder, 42-second push grab, 43-second roller seat, 44-second roller, 45-second slide bar, 46-second slide bar seat, 47-second connecting rod mechanism, 48-heightening frame, 471-second connecting rod seat, 472-third connecting rod, 473-fourth connecting rod, 474-second rotating axis. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] See also Figure 1-2As shown, a connecting rod type pneumatic hollow chuck structure comprises a chuck base 1, a chuck rotating disk 2 is installed on one side of the chuck base 1, a first layer of connecting rod type pneumatic chuck mechanism 3 is arranged on one side of the chuck rotating disk 2, the first layer of connecting rod type pneumatic chuck mechanism 3 comprises two symmetrical first double-axis cylinders 31, the telescopic ends of the first double-axis cylinders 31 are provided with first push grabs 32, two first roller seats 33 are installed on one side of the first push grabs 32, a first roller 34 is rotatably connected between the two first roller seats 33, a first slide bar 35 is slidably connected between both ends of the two first push grabs 32, both ends of the first slide bar 35 are rotatably connected with first slide bar seats 36, the first slide bar seats 36 are installed on the chuck rotating disk 2, a first connecting rod mechanism 37 is arranged between both ends of the two first push grabs 32, and a second connecting rod type pneumatic chuck mechanism 4 is arranged above the first layer of connecting rod type pneumatic chuck mechanism 3.

[0018] The first connecting rod mechanism 37 includes two first connecting rod seats 371, and the two first connecting rod seats 371 are respectively installed at one end of the two first push grasping 32, and the two first connecting rod seats 371 are rotatably connected with the first connecting rod 372 through a rotating shaft, and the two first connecting rods 372 are connected by a second connecting rod 373, and both ends of the second connecting rod 373 are rotatably connected to the two first connecting rods 372 through a rotating shaft, and the center of the second connecting rod 373 is rotatably connected with a first rotating shaft 374, and the bottom of the first rotating shaft 374 is connected to the chuck rotating disk 2, and the connection between the rotating shaft and the connecting rod realizes the conversion and transmission of the piston rod movement, ensuring the synchronization and stability of the clamping action, making the clamping action more accurate and reliable;

[0019] The second connecting rod type pneumatic chuck mechanism 4 comprises two symmetrical second double-axis cylinders 41, the telescopic end of the second double-axis cylinder 41 is provided with a second push grab 42, one side of the second push grab 42 is installed with two second roller seats 43, a second roller 44 is rotatably connected between the two second roller seats 43, a second slide bar 45 is slidably connected between the two ends of the two second push grabs 42, and the two ends of the second slide bar 45 are rotatably connected with the second slide bar seat 46, the second slide bar seat 46 is installed on the chuck rotating disk 2 through the heightening frame 48, and a second connecting rod mechanism 47 is provided between the two ends of the two second push grabs 42. Through the combination of the double-axis cylinder and the connecting rod mechanism, the clamping action is more stable and precise;

[0020] The second connecting rod mechanism 47 includes two second connecting rod seats 471, and the two second connecting rod seats 471 are respectively installed at one end of the two second push grips 42. The two second connecting rod seats 471 are both rotatably connected to the third connecting rod 472 through a rotating shaft. The two third connecting rods 472 are connected through a fourth connecting rod 473. Both ends of the fourth connecting rod 473 are rotatably connected to the two third connecting rods 472 through a rotating shaft. The center of the fourth connecting rod 473 is rotatably connected to a second rotating shaft 474. Through the connection between the rotating shaft and the connecting rod, accurate transmission and synchronous movement of the clamping action are achieved, thereby ensuring the transmission of the clamping force and the fixation of the workpiece.

[0021] The bottom of the second rotating shaft 474 is connected to the first double-axis cylinder 31, and the top of the first rotating shaft 374 is connected to the second double-axis cylinder 41, ensuring that the transmission of the chuck clamping force and the fixing effect of the workpiece are more reliable and efficient.

[0022] Working principle: when air pressure is transmitted to the first double-axis cylinder 31, the piston rod will extend, pushing the first push grab 32 to move outward, and the first roller seat 33 and the first roller 34 on the first push grab 32 will be pushed accordingly to achieve clamping of the workpiece. The first slide bar 35 between the two first push grabs 32 is supported and driven by the first connecting rod mechanism 37 to ensure stability and synchronization during the clamping process. Similarly, when air pressure is transmitted to the second double-axis cylinder 41, the second push grab 42 will move outward, and the second roller seat 43 and the first roller 34 on the second push grab 42 will be pushed accordingly. The second roller 44 will also move outward to strengthen the fixation of the workpiece. The second slide bar 45 is supported and driven by the second connecting rod mechanism 47 to ensure the synchronization and stability during the clamping process. The first connecting rod mechanism 37 and the second connecting rod mechanism 47 are connected through the rotating shaft and the connecting rod, so that the movement of the piston rod is converted into the clamping force on the chuck and the synchronization of the clamping action is ensured. The connection between the first rotating shaft 374 and the second rotating shaft 474 coordinates the movement of the first and second layer connecting rod mechanisms, thereby improving the stability and accuracy of clamping.

[0023] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A connecting rod type pneumatic hollow chuck structure, comprising a chuck base (1), a chuck rotating disk (2) being mounted on one side of the chuck base (1), characterized in that: A first-layer connecting rod type pneumatic chuck mechanism (3) is arranged on one side of the chuck rotating disk (2). The first-layer connecting rod type pneumatic chuck mechanism (3) comprises two symmetrical first double-axis cylinders (31). A first push gripper (32) is arranged at the telescopic end of the first double-axis cylinder (31). Two first roller seats (33) are installed on one side of the first push gripper (32). A first roller (34) is rotatably connected between the two first roller seats (33). A first slide bar (35) is slidably connected between the two ends of the two first push grippers (32). Both ends of the first slide bar (35) are rotatably connected to a first slide bar seat (36). The first slide bar seat (36) is installed on the chuck rotating disk (2). A first connecting rod mechanism (37) is arranged between the two ends of the two first push grippers (32). A second connecting rod type pneumatic chuck mechanism (4) is arranged above the first-layer connecting rod type pneumatic chuck mechanism (3).

2. A connecting rod type pneumatic hollow chuck structure according to claim 1, characterized in that: The first connecting rod mechanism (37) comprises two first connecting rod seats (371), the two first connecting rod seats (371) are respectively mounted on one end of the two first pushing grasps (32), the two first connecting rod seats (371) are rotatably connected to the first connecting rod (372) via a rotating shaft, the two first connecting rods (372) are connected via a second connecting rod (373), both ends of the second connecting rod (373) are rotatably connected to the two first connecting rods (372) via a rotating shaft, the center of the second connecting rod (373) is rotatably connected to the first rotating shaft (374), and the bottom of the first rotating shaft (374) is connected to the chuck rotating disk (2).

3. A connecting rod type pneumatic hollow chuck structure according to claim 2, characterized in that: The second connecting rod type pneumatic chuck mechanism (4) comprises two symmetrical second double-axis cylinders (41), the telescopic end of the second double-axis cylinder (41) is provided with a second push grab (42), one side of the second push grab (42) is provided with two second roller seats (43), a second roller (44) is rotatably connected between the two second roller seats (43), a second slide bar (45) is slidably connected between the two ends of the two second push grabs (42), the two ends of the second slide bar (45) are rotatably connected with a second slide bar seat (46), the second slide bar seat (46) is installed on the chuck rotating disk (2) through a heightening frame (48), and a second connecting rod mechanism (47) is provided between the two ends of the two second push grabs (42).

4. A connecting rod type pneumatic hollow chuck structure according to claim 3, characterized in that: The second connecting rod mechanism (47) comprises two second connecting rod seats (471), the two second connecting rod seats (471) are respectively mounted on one end of the two second push grabs (42), the two second connecting rod seats (471) are rotatably connected to a third connecting rod (472) via a rotating shaft, the two third connecting rods (472) are connected via a fourth connecting rod (473), both ends of the fourth connecting rod (473) are rotatably connected to the two third connecting rods (472) via a rotating shaft, and the center of the fourth connecting rod (473) is rotatably connected to a second rotating shaft (474).

5. A connecting rod type pneumatic hollow chuck structure according to claim 4, characterized in that: The bottom of the second rotating shaft (474) is connected to the first double-shaft cylinder (31), and the top of the first rotating shaft (374) is connected to the second double-shaft cylinder (41).

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