Pneumatic rotary clamping device
A technology of clamping device and rotating structure, applied in the direction of clamping device, positioning device, clamping, etc., can solve the problems of reducing the strength of the piston rod, easy to break the piston rod, etc. Effect
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[0013] Example 1
[0014] A pneumatic rotary clamping device, comprising a cylinder 1 and a pressing arm 4, the pressing arm 4 is connected with the piston rod 11 of the cylinder 1 by bolts, wherein a rotating structure in the cylinder 1 is also provided, and the rotating structure includes an integrally connected base 23 and the spindle 21, the longitudinal section of the base 23 is in the shape of a boss, the flange on the base 23 is connected with the cylinder 1 by bolts, and a sealing ring 25 is provided between the base 23 and the inner wall of the cylinder 1, and the spindle 21 is axially upward A spiral groove 22 is provided, and the spindle 21 is coaxially slidingly fitted with the piston rod 11 from the side of the piston seal 12 of the cylinder 1, and the piston seal 12 of the cylinder 1 is provided with a guiding structure that cooperates with the spiral groove 22.
[0015] In this embodiment, the guiding structure includes a spring seat 31, a compression spring 32, and ...
Example Embodiment
[0018] Example 2
[0019] The difference from Embodiment 1 is that the guide structure includes a mounting seat and a guide pin that can be matched with the spiral groove 22. One end of the guide pin is connected to the mounting seat, and the mounting seat is connected to the piston seal 12 of the cylinder 1. The guide pin guiding structure is simpler .
[0020] Specific use process:
[0021] Take Example 1 as an example, such as figure 1 As shown, taking the pressing arm 4 downward to clamp the workpiece 5 as an example for description, the figure shows the state of clamping the workpiece 5. Intake air into the air hole in the lower part of the cylinder 1. At this time, the piston seal 12 of the cylinder 1 moves upward, and the steel ball of the guiding structure in the piston seal 12 first moves upward along the linear groove 24 on the spindle 21. When it moves to the spiral groove 22, The steel ball slides with the spiral groove 22. At this time, the piston seal 12 and the pisto...
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