Thin pneumatic zero-point positioning device

Abstract

This invention discloses a thin pneumatic zero-point positioning device for positioning a clamping device. It includes a base, a piston, a horizontal pushing unit, and multiple positioning pins. The base has a first cylinder chamber and multiple positioning holes. The piston is vertically and vertically positioned in the first cylinder chamber and has two pushing blocks on top. The two pushing members of the horizontal pushing unit are placed in guide grooves within the base, with their inner ends abutting against the pushing blocks and their outer ends having V-shaped tips. When the positioning pins under the clamping device are inserted into the positioning holes, the piston is driven to rise and fall by pneumatic pressure. The two pushing blocks convert the vertical power into horizontal displacement of the pushing members, causing the V-shaped tips to engage or disengage from the positioning grooves of the positioning pins, thus locking or releasing the clamping device.

Claims

1. A thin pneumatic zero-point positioning device for positioning a clamping device thereon, comprising: A base includes a top surface, a first cylinder chamber, and four positioning holes; the top surface is used to mount the clamping device, the first cylinder chamber is located within the base with its axis perpendicularly pointing to the top surface, and the four positioning holes respectively penetrate the top surface and the top wall of the first cylinder chamber; a piston is movably mounted in the first cylinder chamber, and its side facing the top wall of the first cylinder chamber has two push blocks, each push block having two opposing inclined push surfaces; two horizontal push units, each horizontal push unit corresponding to the push block, and each having two push members that can slide horizontally; the inner end of each push member abuts against the inclined push surface of the push block, and the outer end of each push member has a V-shaped tip; four positioning pins are used to engage with the bottom surface of the clamping device, and when the clamping device is mounted on the top surface, the positioning pins are vertically inserted into the four positioning holes of the base; each positioning pin has a positioning groove on its circumferential surface. When the piston is driven by air pressure to rise and fall in the first cylinder chamber, it simultaneously drives the two push blocks to rise and fall. The vertical power of the piston is converted into the horizontal displacement of the push member by the inclined push surface, so that the V-shaped tip of each push member is radially inserted into or disengaged from the positioning groove of each positioning post, thereby achieving a locked or released positioning state.

2. The thin pneumatic zero-point positioning device as described in claim 1, wherein the two horizontal pushing units include a return spring, the two ends of which are respectively fixed to the two pushing members.

3. The thin pneumatic zero-point positioning device as described in claim 2, wherein the return spring is a tension spring, and the two ends of the tension spring are respectively fixed to the two push members, causing the inner ends of the two push members to abut against the two inclined push surfaces of the push block.

4. The thin pneumatic zero-point positioning device as described in claim 2 or 3, wherein a groove is provided on the upper or lower surface of the two push members, and the return spring is horizontally placed in the groove.

5. The thin pneumatic zero-point positioning device as claimed in claim 1, wherein the top wall of the first cylinder chamber is recessed with two through holes, and each through hole is provided with a guide groove on both sides that horizontally connects the two positioning holes, the two pushers of the horizontal pusher unit are horizontally inserted into the guide grooves on both sides of the through holes, and the pusher block of the piston extends into the through hole and abuts against the inner end of the pusher.

6. The thin pneumatic zero-point positioning device as claimed in claim 1, wherein the piston has four corresponding recesses on one side corresponding to the four positioning holes, and the lower end of each positioning post can be inserted into the recess.

7. The thin pneumatic zero-point positioning device as claimed in claim 1, wherein the top wall of the first cylinder chamber is recessed with a shaft hole, and the piston is provided with a convex shaft on the side corresponding to the shaft hole, the convex shaft being axially movable through the shaft hole.

8. The thin pneumatic zero-point positioning device as claimed in claim 1, wherein the first cylinder chamber is a recessed cavity extending from the bottom surface of the base toward the top surface of the base; the base further includes a cylinder head, which is attached to the bottom surface of the base and closes the lower opening of the first cylinder chamber, thereby defining the piston's operating space between the cylinder head and the top wall of the first cylinder chamber.

9. The thin pneumatic zero-point positioning device as claimed in claim 8, wherein the cylinder head has four corresponding recesses on one side corresponding to the four positioning holes, and the lower end of each positioning post can be inserted into the recess.

10. The thin pneumatic zero-point positioning device as claimed in claim 1, wherein the base is provided with eight positioning holes, and the eight positioning holes are arranged in pairs opposite each other; four push blocks are provided on the side of the piston facing the top wall of the first cylinder chamber; and four sets of horizontal push units are provided, wherein the inner ends of the two push members of each set of horizontal push units abut against the two inclined push surfaces of the push block, and their outer ends respectively correspond to the eight positioning holes.

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