CN213080099U

CN213080099U - Pneumatic clamping device

Info

Publication number: CN213080099U
Application number: CN202021803795.7U
Authority: CN
Inventors: 吴升九; 汪伟东; 张嘉祯
Original assignee: Qijing Machinery Co Ltd
Current assignee: Qijing Machinery Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-04-30
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a pneumatic clamping device, set up the piston rod in the shell including hollow shell and activity, shell and piston rod have formed annular and sealed last plenum and lower plenum, the shell is equipped with the fixed block, with the last air cock of last plenum intercommunication, and with the lower air cock of lower plenum intercommunication, embrace in being equipped with in the piston rod and press from both sides, well embrace to press from both sides and fixed block fixed connection, well embrace to press from both sides and be equipped with and embrace the clamp hole, the portion is pressed from both sides in embracing of slope, and a plurality of annular distribute embrace the clamp groove, embrace in pressing from both sides downthehole and press from both sides, embrace to press from both sides in being equipped with the centre gripping mouth that presss from both sides hole and a plurality of annular distribute in embracing, be. The utility model discloses press from both sides tightly effectually, pneumatic tight mode reaction of clamp is sensitive, and response speed is fast.

Description

Pneumatic clamping device

Technical Field

The utility model belongs to the technical field of at clamping device and specifically relates to a pneumatic clamping device is related to.

Background

The three-jaw chuck consists of a chuck body, movable jaws and a jaw driving mechanism. The lower surfaces of the guide parts of the three jaws on the three-jaw chuck are provided with threads which are meshed with the plane threads on the back surface of the disc-shaped bevel gear, when a spanner is used for rotating the bevel pinion through the square hole, the disc-shaped gear rotates, and the plane threads on the back surface simultaneously drive the three jaws to approach to the center or withdraw from the center so as to clamp workpieces with different diameters. After the three claws are replaced by the three reverse claws, the three reverse claws are used for installing a workpiece with a larger diameter. The self-centering accuracy of the three-jaw chuck is 0.05-0.15 mm. The accuracy with which a three-jaw chuck can be used to machine a workpiece is affected by the accuracy with which the chuck is manufactured and the wear experienced after use.

The workpiece to be processed is placed in the three-jaw chuck, then the workpiece is clamped tightly by using a wrench, the loading and unloading speed is low each time, the time is long, the production efficiency is not high, and the problem needs to be solved.

Disclosure of Invention

The utility model aims to solve the technical problem that a pneumatic clamping device is provided, adopt pneumatic mode to press from both sides the work piece of treating processing tightly, press from both sides tightly, loosen fastly, efficient.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a pneumatic clamping device, includes that hollow shell and activity set up the piston rod in the shell, shell and piston rod have formed annular and sealed last plenum and lower plenum, the shell be equipped with the fixed block, with last air cock of last plenum intercommunication and with the lower air cock of lower plenum intercommunication, the piston rod in be equipped with in embrace and press from both sides, well embrace to press from both sides and fixed block fixed connection, well embrace to press from both sides and be equipped with embracing the clamp hole, the portion is pressed from both sides and a plurality of annular distribution's of embracing of pressing from both sides of holding of slope embrace and press from both sides the groove, embrace to press from both sides downthehole and embrace to press from both sides, interior embrace to press from both sides and be equipped with interior clamp hole and the centre gripping mouth that a plurality of annular distribute, adjacent two the.

As the utility model discloses further improve: the shell is fixedly provided with an upper shell, and the fixing block is fixedly connected with the upper shell through a bolt.

As the utility model discloses further improve: the piston rod is provided with a boss, the upper air cavity is located between the boss and the upper shell, and the lower air cavity is located between the boss and the shell.

As the utility model discloses further improve: the boss be equipped with the middle part sealing washer, the epitheca be equipped with two upper portion sealing washers, the shell be equipped with the lower part sealing washer.

As the utility model discloses further improve: the middle holding clamp is provided with a threaded column, and the threaded column is in threaded connection with the fixed block.

As the utility model discloses further improve: the inner clamping hole is composed of a plurality of clamping holes with different diameters, the clamping holes are distributed in a step shape, and the opening parts of the clamping holes are provided with chamfers.

As the utility model discloses further improve: the clamping opening extends to the bottom from the middle part of the inner holding clamp, and the clamping opening and the clamping hole are respectively provided with a first round hole and a second round hole which are circular.

As the utility model discloses further improve: the holding and clamping groove is provided with a waist-round anti-cracking hole.

As the utility model discloses further improve: the piston rod is provided with a conical expansion hole.

The utility model has the advantages of press from both sides tightly effectually, and pneumatic tight mode reaction of clamp is sensitive, and response speed is fast, and it is big that well armful presss from both sides, interior armful clamp cooperation use back clamp force, and both all take place to warp and press from both sides tight work piece, and the deformation interval is great, so applicable tight work piece of clamp's diameter interval also great, just can general more different diameters's work piece.

The working principle of the utility model is that the upper air nozzle and the lower air nozzle are respectively connected with the first air outlet hole and the second air outlet hole of the pneumatic reversing valve, the air pump is connected with the air inlet hole of the pneumatic reversing valve, and a workpiece to be processed is placed in the inner clamping hole of the inner holding clamp; working state 1: when the air pump during operation, first venthole and inlet port intercommunication, compressed air in the air pump gets into the air cavity from first venthole, goes up the big grow gradually of air cavity volume, and the piston rod moves down and compresses tightly the slope of embracing the clamp and embraces the portion of pressing from both sides, and the holding of embracing of well embracing the clamp groove volume diminishes, embraces the clamp hole diameter and diminishes, then embraces the clamp hole and presss from both sides tightly interior embracing clamp, and interior centre gripping mouth, the centre gripping pore volume of embracing the clamp diminishes, and interior clamp hole diameter diminishes to make interior clamp hole press from both sides tight work piece. And 2, working state: after the workpiece is machined, the pneumatic reversing valve starts to work to communicate the second air outlet hole with the air inlet hole, compressed air in the air pump enters the lower air cavity from the second air outlet hole, the volume of the lower air cavity is gradually increased, the piston rod moves upwards to release the middle clamping clamp, finally the workpiece is released from the inner clamping hole, and a worker takes out the machined workpiece.

Drawings

FIG. 1 is an exploded view of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1-2: the utility model provides a pneumatic clamping device, including hollow shell 3 and the piston rod 2 of activity setting in shell 3, shell 3 and piston rod 2 have formed annular and sealed last air cavity 34 and lower air cavity 35, shell 3 is equipped with fixed block 5, last air nozzle 31 with last air cavity 34 intercommunication, and lower air nozzle 32 with lower air cavity 35 intercommunication, be equipped with well armful clamp 6 in the piston rod 2, well armful clamp 6 and fixed block 5 fixed connection, well armful clamp 6 is equipped with embraces and presss from both sides hole 65, the portion 64 is pressed from both sides in the slope, and a plurality of annular distribution embrace and press from both sides groove 63, embrace and press from both sides 7 in the downthehole 65 of pressing from both sides, interior armful clamp 7 is equipped with interior clamp hole 73 and a plurality of annular distribution's grip orifice 72, be equipped with centre gripping hole 74 between two adjacent grip orifice 72.

The shell 3 is fixedly provided with an upper shell 1, and the fixing block 5 is fixedly connected with the upper shell 1 through a bolt 4.

The piston rod 2 is provided with a boss 21, the upper air cavity 34 is positioned between the boss 21 and the upper shell 1, and the lower air cavity 35 is positioned between the boss 21 and the shell 3. The cavity between the boss and the upper shell forms an upper air cavity, and the cavity between the boss and the outer shell forms a lower air cavity.

The boss 21 is provided with a middle seal ring 23, the upper shell 1 is provided with two upper seal rings 11, and the outer shell 3 is provided with a lower seal ring 33. The middle sealing ring, the upper sealing ring and the lower sealing ring play a sealing role.

The middle holding clamp 6 is provided with a threaded column 61, and the threaded column 61 is in threaded connection with the fixing block 5. The middle holding clamp is fixedly connected with the fixed block.

The inner clamping hole 73 is composed of a plurality of clamping holes 76 with different diameters, the plurality of clamping holes 76 are distributed in a step shape, and the opening part of each clamping hole 76 is provided with a chamfer 77. The chamfer is convenient for the workpiece to be smoothly inserted into the material clamping hole; in order to clamp workpieces with different diameters, the inner clamping hole is provided with a plurality of clamping holes with different diameters, the workpieces are clamped by the clamping holes with corresponding diameters, and the universality is good.

The clamping opening 72 extends from the middle to the bottom of the inner holding clamp 7, and the clamping opening 72 and the clamping hole 74 are respectively provided with a first circular hole 71 and a second circular hole 75 which are circular. The clamping opening and the clamping hole are opened and closed for a long time, the end parts of the clamping opening and the clamping hole are easy to crack, and after the circular hole is formed, the stress of the end parts of the clamping opening and the clamping hole can be reduced, the end parts of the clamping opening and the clamping hole are prevented from cracking, and therefore the service life of the inner holding clamp is prolonged.

The holding and clamping groove 63 is provided with a waist-round anti-cracking hole 62. The upper end of the clamping groove is easy to crack in the long-term opening and closing process, and after the waist-round anti-cracking hole is formed, the stress at the upper end of the clamping groove can be reduced, the clamping groove is prevented from cracking, and therefore the service life of the middle clamping groove is prolonged.

The piston rod 2 is provided with a conical expansion hole 22. The piston rod can reciprocate, and the tight hole of expanding presss from both sides tightly in embracing when downward movement presss from both sides, and the tight hole of expanding loosens when upward movement embraces and presss from both sides in embracing.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a pneumatic clamping device, includes hollow shell and the activity piston rod that sets up in the shell, its characterized in that shell and piston rod have formed annular and sealed last air cavity and lower air cavity, the shell be equipped with the fixed block, with last air cock of last air cavity intercommunication and with the lower air cock of lower air cavity intercommunication, the piston rod in be equipped with well armful press from both sides, well armful press from both sides and fixed block fixed connection, well armful press from both sides and be equipped with the armful clamp hole, the portion that presss from both sides and a plurality of annular distribution's of embracing of pressing from both sides and press from both sides the groove, the armful downthehole embrace and press from both sides, interior armful press from both sides and be equipped with interior clamp hole and the centre gripping mouth that a plurality of annular distribute.

2. The pneumatic clamping device as claimed in claim 1, wherein the housing is fixedly provided with an upper shell, and the fixing block is fixedly connected with the upper shell through a bolt.

3. A pneumatic clamping apparatus as defined in claim 2 wherein said piston rod is provided with a boss, said upper chamber being located between said boss and said upper housing, said lower chamber being located between said boss and said housing.

4. A pneumatic clamping apparatus as claimed in claim 3 wherein said boss is provided with a central seal, said upper housing is provided with two upper seals and said outer housing is provided with a lower seal.

5. The pneumatic clamping device as claimed in claim 1, wherein the middle clamp is provided with a threaded post, and the threaded post is in threaded connection with the fixed block.

6. The pneumatic clamping device as claimed in claim 1, wherein the inner clamping hole is composed of a plurality of clamping holes with different diameters, the plurality of clamping holes are distributed in a step shape, and the mouth of each clamping hole is provided with a chamfer.

7. The pneumatic clamping device as claimed in claim 1, wherein the clamping opening extends from the middle to the bottom of the inner clamp, and the clamping opening and the clamping hole are respectively provided with a first circular hole and a second circular hole.

8. The pneumatic clamping device as claimed in claim 1, wherein the clasping groove is provided with a waist-circular anti-cracking hole.

9. A pneumatic clamping apparatus as defined in claim 1 wherein said piston rod is provided with a tapered expansion bore.