CN222344899U

CN222344899U - A pneumatic clamping mechanism

Info

Publication number: CN222344899U
Application number: CN202420266970.5U
Authority: CN
Inventors: 王刚
Original assignee: Dongguan Weishi Cnc Equipment Co ltd
Current assignee: Dongguan Weishi Cnc Equipment Co ltd
Priority date: 2024-02-04
Filing date: 2024-02-04
Publication date: 2025-01-14
Anticipated expiration: 2034-02-04

Abstract

The utility model discloses a pneumatic clamping mechanism, which relates to the technical field of engraving and milling machines, wherein a movable shaft comprises a fixed shaft fixed in a shell and a movable shaft rotatably connected in the shell, an input shaft is rotatably connected in the fixed shaft, a cavity is reserved in the fixed shaft, one end of the movable shaft is provided with an air passage communicated with the cavity, a piston cylinder is movably connected in the movable shaft, a clamping groove is formed in the periphery of the outer part of an output shaft, and a plurality of steel balls are arranged between the clamping groove and the piston cylinder in a rolling mode. The pneumatic clamping mechanism is characterized in that an air passage is formed in the main shaft, external air is introduced into the main shaft, the piston cylinder is pushed to move by high pressure of the air, the inner diameter of the piston cylinder is large or small, the steel balls are clamped on one side with smaller diameter, the steel balls are extruded, the main shaft is only clamped with the output shaft, the steel balls are clamped on one side with larger diameter, the pressure of the steel balls is released, the output shaft can be taken out from the main shaft, namely, the output shaft is locked and unlocked in a pneumatic mode, and compared with a bolt fixing mode, the pneumatic clamping mechanism is more convenient and labor-saving.

Description

Pneumatic clamping mechanism

Technical Field

The utility model relates to the technical field of engraving and milling machines, in particular to a pneumatic clamping mechanism.

Background

The engraving and milling machine is one of numerical control machine tools, and is mainly used for carrying out non-contact cutting and punching on metal or non-metal plates and pipes, when the engraving and milling machine is used for processing a workpiece, the workpiece is required to be fixed through a clamp or a jig, and then the surface of the workpiece is processed through a machine head of the engraving and milling machine;

The fixture or the jig of the existing engraving and milling machine is usually arranged on a main shaft of the engraving and milling machine, a driving mechanism drives a workpiece, the fixture or the jig is connected with the main shaft, a bolt is usually used for fixing the fixture or the jig in a bolt fixing mode, the fixture or the jig is required to be frequently disassembled and assembled, and the bolt is required to be frequently replaced due to the fact that the bolt is frequently disassembled and assembled.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides a pneumatic clamping mechanism, which solves the problems proposed by the background technology.

The pneumatic clamping mechanism comprises a shell, wherein a movable shaft is arranged in the shell, the movable shaft comprises a fixed shaft fixed in the shell and a movable shaft rotatably connected in the shell, an input shaft is rotatably connected in the fixed shaft, the end part of the input shaft is fixedly connected with the movable shaft, an output shaft is fixedly clamped in the movable shaft, a cavity is reserved in the fixed shaft, an air passage communicated with the cavity is formed in one end of the movable shaft, a piston cylinder is movably connected in the movable shaft, an end cover is fixedly connected to the other end of the movable shaft, the piston cylinder is fixedly connected with the end cover through a plurality of springs, a clamping groove is formed in one circle outside the output shaft, a plurality of steel balls are arranged between the clamping groove and the piston cylinder in a rolling mode, and a step groove is formed in the movable shaft.

Furthermore, the input shaft is connected with the fixed shaft through a bearing, and the input shaft and the fixed shaft can rotate relatively through the bearing.

Further, the end part of the end cover is fixedly connected with a lower clamping plate, the upper part of the lower clamping plate is fixedly connected with an upper clamping plate through a bolt, and the lower clamping plate and the upper clamping plate are clamped and fixed with a workpiece together.

Further, the rotary driving motor is fixedly arranged at the bottom end of the inside of the shell, the driving end of the rotary driving motor and the input shaft are jointly driven through the belt pulley group, and the end face of the shell is plugged through the cover plate.

Further, the end face of the fixed shaft is fixedly connected with an air pipe connector, the air pipe connector is communicated with the cavity, and an air pipe connected with the air pipe connector extends to the outside through the side wall of the shell.

Further, a space capable of enabling the piston cylinder to move transversely is reserved in the end cover.

The utility model provides a pneumatic clamping mechanism. Compared with the prior art, the method has the following beneficial effects:

The pneumatic clamping mechanism is characterized in that an air passage is formed in the main shaft, external air is introduced into the main shaft, the piston cylinder is pushed to move by high pressure of the air, the inner diameter of the piston cylinder is large or small, the steel balls are clamped on one side with smaller diameter, the steel balls are extruded, the main shaft is only clamped with the output shaft, the steel balls are clamped on one side with larger diameter, the pressure of the steel balls is released, the output shaft can be taken out from the main shaft, namely, the output shaft is locked and unlocked in a pneumatic mode, and compared with a bolt fixing mode, the pneumatic clamping mechanism is more convenient and labor-saving.

Drawings

FIG. 1 is a schematic diagram of the present utility model in a split;

FIG. 2 is a schematic view of an assembled structure of the present utility model;

FIG. 3 is a top view of the assembled utility model;

FIG. 4 is an elevation view of the assembled utility model;

FIG. 5 is a schematic view of the structure of the first view angle of the moving axis and the fixed axis in the present utility model;

FIG. 6 is a schematic view of the structure of the second view angle of the moving axis and the fixed axis in the present utility model;

FIG. 7 is a cross-sectional view of A-A of FIG. 3 in accordance with the present utility model;

FIG. 8 is a cross-sectional view of B-B of FIG. 4 in accordance with the present utility model;

fig. 9 is a schematic diagram of a reserved step groove in the inner part of the moving shaft in the utility model.

FIG. 10 is a schematic view of a chamber according to the present utility model.

1, A shell, 2, a moving shaft, 21, an input shaft, 22, an output shaft, 23, an air pipe joint, 24, a cavity, 25, an air passage, 251, a cavity, 26, a piston cylinder, 27, a clamping groove, 28, steel balls, 29, a fixed shaft, 210, a bearing, 211, a step groove, 3, an end cover, 4, a spring, 5, a lower clamping plate, 51, an upper clamping plate, 6, a rotary driving motor, 7, a pulley set, 8, a cover plate, 9 and a workpiece.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-8, the present utility model provides a technical solution: the pneumatic clamping mechanism comprises a shell 1, a movable shaft 2 is arranged in the shell 1, the movable shaft 2 comprises a fixed shaft 29 fixed in the shell 1 and the movable shaft 2 rotatably connected in the shell 1, an input shaft 21 is rotatably connected in the fixed shaft 29 (the input shaft 21 and the fixed shaft 29 are connected through a bearing 210 and can rotate relatively through the bearing 210), the end part of the input shaft 21 is fixedly connected with the movable shaft 2, an output shaft 22 is fixedly clamped in the movable shaft 2, a cavity 24 is reserved in the fixed shaft 29, an air passage 25 communicated with the cavity 24 is formed in one end of the movable shaft 2, a piston cylinder 26 is movably connected in the movable shaft 2, an end cover 3 is fixedly connected to the other end of the movable shaft 2, the piston cylinder 26 is fixedly connected with the end cover 3 through a plurality of springs 4 (a space capable of transversely moving the piston cylinder 26 is reserved in the end cover 3), a clamping groove 27 is formed in the outer part of the output shaft 22 in a circle, a plurality of steel balls 28 are arranged between the clamping groove 27 and the piston cylinder 26 in a rolling way, a step groove 211 is formed in the inner part of the moving shaft 2, the end part of the end cover 3 is fixedly connected with a lower clamping plate 5, the upper part of the lower clamping plate 5 is fixedly connected with an upper clamping plate 51 through bolts, the lower clamping plate 5 and the upper clamping plate 51 jointly clamp and fix a workpiece 9, a rotary driving motor 6 is fixedly arranged at the inner bottom end of the shell 1, the driving end of the rotary driving motor 6 and the input shaft 21 jointly drive through a belt pulley set 7, the end face of the shell 1 is plugged through a cover plate 8, an air pipe joint 23 is fixedly connected with the end face of the fixed shaft 29, the air pipe joint 23 is communicated with the cavity 24, and an air pipe connected with the air pipe joint 23, through the side wall of the housing 1 to the outside (the air tube is not shown in the figure).

As shown in fig. 10, a chamber 251 is disposed between the air passage 25 and the piston cylinder 26, and air pressure in the cavity 24 enters the chamber 251 from the air passage 25, that is, the distance between the previous chamber 251 is small, the piston cylinder 26 is pushed by air pressure to enlarge the small cavity of the chamber 251, and when no air pressure exists, the pressure is released by the spring 4 to reduce the chamber 251.

When the fixture is used, the edge of the workpiece 9 is firstly placed on the lower clamping plate 5, then the upper clamping plate 51 is attached to the edge of the upper surface of the workpiece 9, and then the upper clamping plate 5 and the lower clamping plate 51 are fixedly connected together by using bolts, so that the workpiece 9 can be fixed;

After the workpiece 9 is fixed, the rotary driving motor 6 is started to drive the belt pulley group 7 to rotate, so that the input shaft 21 is driven to rotate, and because the input shaft 21 is connected with the fixed shaft 29 through the bearing 210 and the end part of the input shaft 21 is fixedly connected with the movable shaft 2, when the input shaft 21 rotates, the movable shaft 2 and the output shaft 22 are driven to synchronously rotate, so that the workpiece 9 is driven to rotate through the end cover 3, the lower clamping plate 5 and the upper clamping plate 51;

When the output shaft 2 needs to be removed from the output shaft 22, gas is injected into the air pipe joint 23 and enters the air passage 25 to form high pressure, the high pressure pushes the piston cylinder 26 to move towards the right side (taking the view of fig. 7 as an example), in the right moving process, on one hand, the piston cylinder 26 compresses the spring 4, on the other hand, the piston cylinder 26 moves right, the step groove 211 also moves along, before moving, the steel ball 28 is extruded on the side with smaller diameter all the time, so that the steel ball 28 is clamped in the clamping groove 27, under the action of pressure, the output shaft 22 cannot be pulled out from the inside of the output shaft 2, but when the position of the side with larger diameter (the step groove 211) corresponds to the steel ball 28, the steel ball 28 is not extruded by the piston cylinder 26 any more due to the fact that the diameter is increased, and the steel ball 28 is separated from the clamping groove 27, and can be pulled out from the inside of the output shaft 22.

Claims

1. The utility model provides a pneumatic fixture, includes casing (1), its characterized in that, internally mounted of casing (1) has movable shaft (2), movable shaft (2) are including fixing fixed axle (29) and the movable shaft (2) of swivelling joint in casing (1) inside casing (1), the inside swivelling joint of fixed axle (29) has input shaft (21), the tip and the movable shaft (2) fixed connection of input shaft (21), the inside centre gripping of movable shaft (2) is fixed with output shaft (22), the inside reservation of fixed axle (29) is provided with cavity (24), air flue (25) that are linked together with cavity (24) are seted up to the one end of movable shaft (2), the inside swing joint of movable shaft (2) has piston cylinder (26), the other end fixedly connected with end cover (3) of movable shaft (2), through a plurality of springs (4) fixed connection between piston cylinder (26) and end cover (3), draw-in groove (27) are seted up in groove (27) in the outside a week of output shaft (22), be provided with rolling groove (211) between draw-in groove (27) and piston cylinder (26), rolling groove (28).

2. A pneumatic clamping mechanism according to claim 1, wherein the input shaft (21) and the fixed shaft (29) are connected by a bearing (210), and the input shaft (21) and the fixed shaft (29) can rotate relatively by the bearing (210).

3. A pneumatic clamping mechanism according to claim 1, wherein the end part of the end cover (3) is fixedly connected with a lower clamping plate (5), the upper part of the lower clamping plate (5) is fixedly connected with an upper clamping plate (51) through a bolt, and the lower clamping plate (5) and the upper clamping plate (51) are jointly clamped and fixed with a workpiece (9).

4. A pneumatic clamping mechanism according to claim 1, characterized in that a rotary driving motor (6) is fixedly arranged at the bottom end of the inside of the shell (1), the driving end of the rotary driving motor (6) and the input shaft (21) are jointly driven by a belt pulley set (7), and the end face of the shell (1) is plugged by a cover plate (8).

5. A pneumatic clamping mechanism according to claim 1, wherein the end face of the fixed shaft (29) is fixedly connected with an air pipe joint (23), the air pipe joint (23) is communicated with the cavity (24), and an air pipe connected with the air pipe joint (23) extends to the outside through the side wall of the shell (1).

6. A pneumatic clamping mechanism according to claim 1, characterized in that the interior of the end cap (3) is reserved with a space for the lateral movement of the piston cylinder (26).