CN210147503U

CN210147503U - Full-automatic pneumatic external clamping fixture

Info

Publication number: CN210147503U
Application number: CN201921039131.5U
Authority: CN
Inventors: 胡蓓雷
Original assignee: Shenzhen Mingtai Technology Co Ltd
Current assignee: Shenzhen Mingtai Technology Co Ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-03-17
Anticipated expiration: 2029-07-04

Abstract

The utility model discloses a full-automatic pneumatic external clamping fixture, which comprises a piston assembly and a chuck assembly connected with the piston assembly, wherein the piston assembly comprises a piston main body and a piston arranged in the piston main body; the piston cavity is arranged at the bottom of the piston and is connected with an air inlet hole and a pressure relief hole which are arranged outside the piston main body, and the chuck component comprises a chuck base arranged at the upper end of the piston main body; the conical chuck thimble is arranged in the middle of the inside of the chuck base; the piston assembly further comprises a thimble positioning groove which is arranged in the middle of the upper end of the piston and corresponds to the bottom end of the truncated cone-shaped thimble. The utility model provides an among the prior art anchor clamps structure adopt the fixed problem complicated with the structure that the clamp power that leads to of screwed connection easily changes, mechanical wear fast.

Description

Full-automatic pneumatic external clamping fixture

Technical Field

The utility model relates to an electromechanical field, in particular to full-automatic pneumatic outer anchor clamps that press from both sides.

Background

In the field of mechanical and electrical machining and manufacturing, the clamp is used as an important part in a material moving device, the reasonability of the structural design directly determines the material carrying efficiency, the clamp in the field of mechanical and electrical machining and manufacturing in the prior art is usually directly clamped by fixing the clamp through screws, the clamping force control requirement is high when a hollow jig such as a pipe is machined by the clamp mode, the internal structure of the clamp is complex, and the clamping piece is easy to bend, deform and wear after long-term use, so that the clamping force is changed.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the main object of the present invention is to provide a full-automatic pneumatic external clamping fixture, which aims to solve the problems of the prior art that the clamping force is easy to change, the mechanical abrasion is fast and the structure is complex due to the common adoption of the fixture structure with the screw connection for fixing.

In order to achieve the purpose, the utility model provides a full-automatic pneumatic external clamping fixture, which comprises a piston assembly and a chuck assembly connected with the piston assembly, wherein the piston assembly comprises a piston main body and a piston arranged in the piston main body; the piston cavity is arranged at the bottom of the piston and is connected with an air inlet hole and a pressure relief hole which are arranged outside the piston main body, and the chuck component comprises a chuck base arranged at the upper end of the piston main body; the conical chuck thimble is arranged in the middle of the inside of the chuck base; an inner chuck arranged at the upper end of the chuck base, wherein the upper end of the inner chuck is provided with a vertical equi-division cylindrical block, a conical inner cavity corresponding to the conical shape of the upper end of the conical chuck thimble is arranged in the inner chuck,

the piston assembly further comprises a thimble positioning groove which is arranged in the middle of the upper end of the piston and corresponds to the bottom end of the thimble of the cone frustum-shaped chuck.

In one embodiment, the piston assembly further comprises a piston base arranged outside the piston main body, and the two sides of the piston base are provided with bracket bases.

In one embodiment, an outer collar is further disposed between the piston base and the piston body.

In one embodiment, the piston base is detachably connected with the chuck base, and the chuck base is an integrally formed structure.

In one embodiment, a turntable is attached to the bottom of the piston assembly.

In one embodiment, the vertical equally-divided cylindrical block at the upper end of the inner chuck is a six-equally-divided cylindrical block.

In one embodiment, the round edge of the upper end surface of the conical chuck thimble is provided with a round corner edge.

The beneficial effects are as follows:

this anchor clamps structure passes through piston and thimble cooperation, makes the thimble go upward and push up the interior chuck open, and the outside pipe fitting of chuck will be propped tightly including cup jointing, compared with the prior art, the utility model discloses avoided mechanical friction, avoided the mechanical wear that brings through the screw fixation clamping piece mode simultaneously, life is longer, and is even by the folder atress, has avoided the pipe fitting because the damage that the atress is inhomogeneous leads to.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the piston assembly and the chuck assembly of the present invention.

Fig. 2 is a schematic view of an assembly structure of the chuck assembly and the piston assembly according to the present invention.

Fig. 3 is the schematic view of the installation positions of the air inlet hole and the pressure relief hole in the present invention.

Fig. 4 is a schematic view of a round corner edge arranged at the upper end of the conical thimble of the present invention.

Fig. 5 is a schematic view of a disassembly structure of the piston assembly and the chuck assembly of the present invention.

Fig. 6 is a schematic view of the tapered inner cavity inside the inner chuck according to the present invention.

[ main parts/assembly reference numerals ] description

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

The description in this application as relating to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Example 1:

referring to fig. 1 to 6, the full-automatic pneumatic external clamping fixture comprises a piston assembly 1 and a clamping head assembly 2 connected with the piston assembly 1, wherein the piston assembly 1 comprises a piston main body 11 and a piston 12 arranged in the piston main body 11; the piston cavity 14 is arranged at the bottom of the piston 12, the piston cavity 14 is connected with an air inlet 5 and a pressure relief hole 50 which are arranged outside the piston main body 11, and the chuck assembly 2 comprises a chuck base 20 arranged at the upper end of the piston main body 11; a truncated cone-shaped chuck center 21 provided at an intermediate position inside the chuck base 20; an inner chuck 22 arranged at the upper end of the chuck base 20, the upper end of the inner chuck 22 is a vertical equally-divided cylindrical block, a conical inner cavity 220 corresponding to the conical shape of the upper end of the conical chuck thimble 21 is arranged in the inner chuck 22,

the piston assembly 1 further includes a pin positioning groove 13 disposed in the middle of the upper end of the piston 12 and corresponding to the bottom end of the truncated cone-shaped chuck pin 21.

When the pipe fitting is started to work, the air inlet holes 5 are filled with air to the piston cavity 14, the air in the piston cavity 14 pushes the piston 12 to move upwards, the piston 12 moving upwards pushes the conical chuck ejector pin in the ejector pin positioning groove 13, the conical inner cavity 220 corresponding to the outer contour of the upper end of the conical chuck ejector pin is arranged in the inner chuck 22, so that the conical chuck ejector pin is completely attached to the inner chuck 22 to move upwards when moving upwards continuously, the vertical equi-division cylindrical block at the upper end of the inner chuck 22 is expanded outwards by the pushing force of the lower frustum-shaped chuck ejector pin, and if a pipe fitting is sleeved on the inner chuck 22, the pipe fitting can be tightly supported from the inside of the pipe. When the work is finished, the pressure relief hole 50 begins to relieve pressure, the conical chuck ejector pin can go down again, and the vertical equant cylindrical block at the upper end of the inner chuck 22 is contracted inwards.

Referring to fig. 1, preferably, the piston assembly 1 further includes a piston base 10 disposed outside the piston main body 11, and the bracket bases 4 are disposed on both sides of the piston base 10.

Referring to fig. 1 and 5, an outer collar 100 is preferably further disposed between the piston base 10 and the piston body 11.

The outer collar 100 disposed between the piston base 10 and the piston body 11 can prevent the piston 12 from leaking air, and the outer collar 100 can prevent air from escaping from the side of the circular piston 12, and the outer collar 100 may be a rubber ring or other soft plastic collars with certain toughness.

Referring to fig. 1, preferably, the piston base 10 is detachably connected to the cartridge base 20, and the cartridge base 20 is an integrally formed structure.

The clamping mechanism in the prior art is usually fixed by fixing parts such as screws, and abrasion and vibration are easily caused due to the existence of mechanical gaps in a large amount of long-time clamping work, so that the clamp is easily broken down, and therefore the base is of an integrated structure, so that the fixing strength is enhanced, the mechanical abrasion caused by long-time work is avoided, and the mechanical vibration is reduced.

Referring to fig. 1 and 5, a turntable 3 is preferably connected to the bottom of the piston assembly 1.

Referring to fig. 2, it is preferable that the vertical bisected cylindrical block at the upper end of the inner chuck 22 is a hexagonal bisected cylindrical block.

When the pipe fitting clamping is carried out, the vertical equally-divided cylindrical blocks at the upper end of the inner chuck 22 are set to be six equally-divided cylindrical blocks in consideration of the average force-bearing value, the interval and the friction force between every two equally-divided cylindrical blocks are moderate, and if the vertically-divided cylindrical blocks are changed to be other equally-divided forms, the force-bearing value and the friction force cannot be balanced.

Referring to fig. 4, preferably, the circular edge of the upper end surface of the truncated cone-shaped collet thimble 21 is provided with a circular corner edge 210.

The resistance needs to be reduced as much as possible in the ascending process of the truncated cone-shaped chuck thimble 21, and if the round edge 210 is not arranged on the round edge of the upper end surface of the truncated cone-shaped chuck thimble 21, a large amount of friction is easily generated with the middle part of the inner chuck 22 in the ascending process, and even the inner chuck is completely clamped. After the rounded edge 210 is provided, the friction with the middle of the inner chuck 22 is reduced as much as possible, so that the ascending process is smoother.

The working principle is as follows:

the gas in the piston cavity 14 pushes the piston 12 to move upwards, the piston 12 moving upwards pushes the conical chuck thimble in the thimble positioning groove 13, the conical inner cavity 220 corresponding to the outer contour of the upper end of the conical chuck thimble is arranged in the inner chuck 22, so the conical chuck thimble is completely attached to the inner chuck 22 to move upwards when moving upwards, the vertical equant cylinder block at the upper end of the inner chuck 22 is expanded outwards by the pushing force of the lower conical chuck top, and if a pipe fitting is sleeved on the inner chuck 22, the pipe fitting can be tightly supported from the inside of the pipe fitting.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The full-automatic pneumatic external clamping fixture is characterized by comprising a piston assembly and a clamping head assembly connected with the piston assembly, wherein the piston assembly comprises a piston main body and a piston arranged in the piston main body; the piston cavity is arranged at the bottom of the piston and is connected with an air inlet hole and a pressure relief hole which are arranged outside the piston main body, and the chuck assembly comprises a chuck base arranged at the upper end of the piston main body; the conical chuck ejector pin is arranged in the middle of the inner part of the chuck base; an inner chuck arranged at the upper end of the chuck base, wherein the upper end of the inner chuck is provided with a vertical equi-division cylindrical block, a conical inner cavity corresponding to the conical shape of the upper end of the conical chuck thimble is arranged in the inner chuck,

2. The clamp of claim 1, wherein the piston assembly further comprises a piston base disposed outside the piston body, and the piston base is provided with a bracket seat on both sides.

3. The clamp of claim 2, wherein an outer collar is disposed between the piston base and the piston body.

4. The clamp of claim 2, wherein the piston base is detachably connected to the collet base, and the collet base is an integrally formed structure.

5. The fully automatic pneumatic external clamp of claim 1, wherein a turntable is attached to the bottom of the piston assembly.

6. The full-automatic pneumatic external clamp fixture according to claim 1, wherein the vertical equant cylinder block at the upper end of the internal clamp is a hexa-equant cylinder block.

7. The clamp of claim 1, wherein the circular edge of the upper end surface of the thimble of the truncated cone-shaped chuck is provided with a rounded edge.