External expansion positioning pull-down clamping device

Abstract

An external expansion positioning pull-down clamping device is composed of a guide core, an expansion core, a clamping jaw, an outer sleeve, a first check ring, a pin shaft, a first steel ball, a first screw, a second steel ball, a first sealing ring, a body, a spring, a second sealing ring, a piston, a magnetic ring, a pressing piece, a second screw, a third seal, a second check ring, a tail cover, a fourth sealing ring and a piston rod. The inclined face on the expansion core pushes the clamping jaw to move in the radial direction till the outer wall of the clamping jaw makes contact with the inner side wall of the outer sleeve, and under the action of the air pressure and the spring, the force exerted by the inclined face on the expansion core to the inclined face on the clamping jaw generates component force in the two directions; the downward component force enables the clamping jaw to overcome the friction force between the clamping jaw and the outer sleeve and then drive the guide core to move downwards, and downward pulling and clamping of the tool plate are achieved. When air pressure is introduced into the release air inlet, the piston pushes the piston rod, the expansion core and the guide core to move upwards, the clamping jaw is matched with the T-shaped groove between the clamping jaw and the expansion core to achieve inward shrinkage, and unlocking of the tool plate is achieved.

Description

Technical Field

[0001] The invention relates to an outward expansion positioning pull-down clamp which plays a role of rapid locking and unlocking in the field of automated manufacturing. Background Art

[0002] At present, it is well known that the device that can lock the tooling and molds is generally screws. However, when the tooling and molds need to be changed quickly, if screws are used, it will take a long time to disassemble and assemble, which will inevitably cause the production line to stop for a long time, thereby wasting a lot of downtime and greatly reducing the production utilization rate of production equipment. Summary of the invention

[0003] In the process of switching tooling on the production line, in order to reduce the downtime and realize the rapid switching of tooling and molds, the present invention provides an external expansion positioning pull-down clamp, by fixing the external expansion positioning pull-down clamp on the workbench of the equipment, by controlling the input and closing of the tensioning air inlet and releasing the air pressure of the air inlet, the locking and unlocking between the external expansion positioning pull-down clamp and the object hole of the tooling plate can be realized, thereby realizing the rapid switching of tooling.

[0004] The design scheme adopted by the present invention to realize the functions of rapid diameter expansion locking and diameter reduction unlocking is: composed of a guide core, an expansion core, a clamping claw, a jacket, a retaining ring 1, a pin shaft, a steel ball 1, a screw 1, a steel ball 2, a sealing ring 1, a body, a spring, a sealing ring 2, a piston, a magnetic ring, a pressing plate, a screw 2, a sealing 3, a retaining ring 2, a tail cover, a sealing ring 4, and a piston rod. The invention is characterized in that the sealing ring 2 is sleeved in the sealing ring groove on the outer diameter of the piston, the magnetic ring is installed on the lower step surface of the piston, the pressing plate cover is pressed on the bottom surface of the magnetic ring, the sealing ring 4 is sleeved on the step shaft at the lower end of the piston rod, the screw 2 passes through the pressing plate and the piston and is locked in the hole with internal thread at the lower end of the piston rod, the spring is sleeved on the outer diameter of the piston rod, the upper end of the spring presses against the bottom surface in the body, the lower end surface of the spring presses against the step surface at the upper end of the piston, and the sealing ring 1 is installed on the body. The piston rod passes through the hole and sealing ring 1 of the main body, the expansion core is connected with the piston rod through a pin shaft, the claw is installed in the T-slot of the expansion core, the claw is located in the window groove on the side of the head of the guide core, the retaining ring 1 is respectively located in the groove of the outer wall of the guide core and the groove of the inner wall of the outer jacket, the retaining ring 1 has an opening that can be retracted, the steel ball 1 and the steel ball 2 are respectively embedded in the grooves of the guide core and the side wall of the main body, the outer jacket is sleeved on the outer diameter of the guide core, the outer jacket is locked with the main body through screw 1, the sealing ring 3 is sleeved in the sealing ring groove on the outer diameter of the tail cover, the tail cover is installed in the hole at the bottom of the main body, the retaining ring 2 is installed in the groove on the inner wall of the hole at the bottom of the main body, the main body is provided with a tightening air inlet for the external expansion claw and a releasing air inlet for the internal retraction claw, and the claw and the expansion core are respectively provided with T-slots for coordinated movement.

[0005] The beneficial effects of the present invention are that it is composed of a guide core, an expansion core, a clamping claw, a jacket, a retaining ring, a pin shaft, a steel ball, a screw, a steel ball, a sealing ring, a body, a spring, a sealing ring, a piston, a magnetic ring, a pressing piece, a screw, a seal, a retaining ring, a tail cover, a sealing ring, and a piston rod. The invention is characterized in that when air pressure is introduced into the expansion air inlet, the piston drives the piston rod and the expansion core to move downward under the action of the air pressure and the spring. When the expansion core is pulled downward by the piston rod, the inclined surface on the expansion core pushes the clamping claw to move radially along the expansion core until the outer side wall of the clamping claw contacts the inner side wall of the hole on the jacket and stops the outward expansion movement. At this time, the expansion movement continues. Under the action of air pressure and spring, the guide core overcomes the resistance between the retaining ring 1 and the retaining ring groove on the inner wall of the outer sleeve, so that the retaining ring 1 is completely retracted into the groove of the guide core. The piston and piston rod continue to pull the expansion core downward through the pin shaft under the action of air pressure and spring. The force applied by the inclined surface on the expansion core to the inclined surface on the claw produces two-directional components. The downward component makes the claw move downward with the guide core after overcoming the friction between the outer sleeve. In the first stage of this process, the claw expands outward to tighten and position the hole on the tooling plate. In the second stage, the claw drives the guide core to move downward together to clamp the tooling plate. When the air pressure input of the tightening air inlet is cut off and the air pressure is introduced into the release air inlet, the piston pushes the piston rod, the expansion core and the guide core to move upward. The claw retracts by cooperating with the T-slot between the expansion core, thereby unlocking the tooling plate. A magnetic ring is installed on the piston, and a magnetic induction switch can be installed on the body to feedback the locking and unlocking signals to the control system. The inner side wall of the outer sleeve is provided with a guiding and positioning groove, and the guiding core and the body are guided and positioned with the outer sleeve through steel balls embedded on their respective side walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0007] Figure 1 It is a longitudinal sectional view of the present invention (showing the state in which the piston, piston rod, expansion core and guide core are in the uppermost position when the air pressure is released from the air inlet, the claws are completely retracted into the outer wall of the guide core, and the guide core of the clamp can enter the hole on the tooling plate).

[0008] Figure 2 It is a longitudinal sectional view of the present invention (showing the state where the side wall of the claw contacts the inner wall of the hole on the outer sleeve after the piston and the piston rod move downward for a certain stroke).

[0009] Figure 3It is a longitudinal sectional view of the present invention (showing that under the action of air pressure and spring, the guide core overcomes the resistance between the retaining ring 1 and the retaining ring groove on the inner wall of the outer sleeve, so that the retaining ring 1 is completely retracted into the groove of the guide core, and the piston and the piston rod continue to pull the expansion core downward through the pin shaft under the action of air pressure and spring, and the force applied by the inclined surface on the expansion core to the inclined surface on the claw generates component forces in two directions, among which the downward component force causes the claw to move downward with the guide core to a certain position after overcoming the friction between the claw and the outer sleeve).

[0010] Figure 4 yes Figure 2 AA section view (focusing on the T-slot matching relationship between the clamping claw and the expansion core).

[0011] In the figure, 1. guide core, 2. expansion core, 3. clamping claw, 4. outer sleeve, 5. retaining ring 1, 6. pin shaft, 7. steel ball 1, 8. screw 1, 9. steel ball 2, 10. sealing ring 1, 11. body, 12. spring, 13. sealing ring 2, 14. piston, 15. magnetic ring, 16. pressing piece, 17. screw 2, 18. sealing 3, 19. retaining ring 2, 20. tail cover, 21. sealing ring 4, 22. piston rod, E is the tightening air inlet on the body, F is the release air inlet on the body, and G is the T-slot for the coordinated movement between the clamping claw and the expansion core. DETAILED DESCRIPTION

[0012] exist Figure 1 When the air pressure is released through the air inlet F, the piston 14, the piston rod 22, the expansion core 2 and the guide core 1 are in the uppermost state, at which time the claw 3 is completely retracted into the outer wall of the guide core 1, and the guide core 1 of the clamp can enter the hole on the tooling plate.

[0013] exist Figure 2 When air pressure is introduced into the tightening air inlet E, under the action of air pressure and spring 12, piston 14 drives piston rod 22 and expanding core 2 to move downward. When expanding core 2 is pulled downward by piston rod 22, the inclined surface on expanding core 2 pushes claw 3 to move radially along expanding core 2 until the outer wall of claw 3 contacts the inner wall of the hole in outer sleeve 4 and stops the outward expansion movement.

[0014] exist Figure 3 In the figure, it is shown that under the action of air pressure and spring 12, the guide core 1 overcomes the resistance between the retaining ring 5 and the retaining ring groove on the inner wall of the outer sleeve 4, so that the retaining ring 5 is completely retracted into the groove of the guide core 1, and the piston 14 and the piston rod 22 continue to pull the expansion core 2 downward through the pin 6 under the action of air pressure and spring 12. The force applied by the inclined surface on the expansion core 2 to the inclined surface on the claw 3 generates component forces in two directions, among which the downward component force causes the claw 3 to move downward with the guide core 1 to a certain position after overcoming the friction between the claw 3 and the outer sleeve 4.

[0015] exist Figure 4 In the figure, the matching relationship between the T-slots of the clamping claws 3 and the expansion core 2 is shown.

Claims

1. An external expansion positioning and pull-down clamp, consisting of a guide core, an expansion core, a claw, a jacket, a retaining ring, a pin, a steel ball, a screw, a steel ball, a sealing ring, a body, a spring, a sealing ring, a piston, a magnetic ring, a pressing piece, a screw, a seal, a retaining ring, a tail cover, a sealing ring, and a piston rod, characterized in that: The second sealing ring is installed in the sealing ring groove on the outer diameter of the piston, the magnetic ring is installed on the lower step surface of the piston, the pressure plate cover is pressed on the bottom surface of the magnetic ring, the fourth sealing ring is installed on the step shaft at the lower end of the piston rod, the second screw passes through the pressure plate and the piston and is locked in the hole with internal thread at the lower end of the piston rod, the spring is installed on the outer diameter of the piston rod, the upper end of the spring presses on the bottom surface inside the body, and the lower end surface of the spring is pressed tightly on the step surface at the upper end of the piston, the first sealing ring is installed in the sealing ring groove on the inner wall of the upper hole of the body, the piston rod passes through the hole of the body and the first sealing ring, the expansion core is connected to the piston rod through the pin shaft, the claw is installed in the T-slot of the expansion core, and the claw position The invention relates to a method for manufacturing a plurality of camshafts comprising: first, a plurality of camshafts and a plurality of camshafts, wherein the plurality of camshafts are connected to the guide core and the main body. The plurality of camshafts are connected to the guide core and the main body. The plurality of camshafts are connected to the guide core and the main body. The plurality of camshafts are connected to the guide core and the main body. The plurality of camshafts are connected to the guide core and the main body. The plurality of camshafts are connected to the guide core and the main body. The plurality of camshafts are connected to the guide core and the main body.

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