CN210968223U

CN210968223U - Pneumatic mechanical fixing device

Info

Publication number: CN210968223U
Application number: CN201921721771.4U
Authority: CN
Inventors: 校利凯
Original assignee: II VI Optics Suzhou Co Ltd
Current assignee: II VI Optics Suzhou Co Ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-07-10
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a pneumatic machinery fixing device, include: the device comprises a base body, a piston, a support, a spring and an elastic clamp; the base body is internally provided with an accommodating cavity and a vent hole, the accommodating cavity is communicated with the vent hole, and the piston is arranged in the accommodating cavity of the base body; the support is arranged above the base body and the piston and fixedly connected with the base body; the spring is arranged in the support; the elastic clamp comprises a clamping block and a positioning block, the clamping block is of a hollow structure, the positioning block is arranged in the clamping block, the positioning block is in abutting connection with the side wall of the clamping block, and the positioning block is fixedly connected with the piston; the upper end of the side wall of the clamping block is provided with a slot; the cross-sectional area of one end of the clamping block close to the support is larger than that of one end of the clamping block far away from the support. In this way, the utility model discloses can avoid taking place the part with the phenomenon of changeing or running the position, also solve simultaneously processing than hard part or when getting rid of the great part of volume, the part is with changeing in anchor clamps, processing texture inhomogeneous and coarse problem.

Description

Pneumatic mechanical fixing device

Technical Field

The utility model relates to a lens centre gripping technical field especially relates to a pneumatic machinery fixing device.

Background

In the prior milling, grinding and polishing processes of lenses in the market, pure mechanical holding is mostly adopted, namely, a mode of a spring and a cam is utilized to tighten an elastic chuck, so that the holding effect is achieved; or the pure vacuum adsorption clamping is adopted, and the vacuum cavity is used for adsorbing the part to play a role in fixing, which is a common method at present. In addition, when a large clamping force is required in lens processing, for example, when a relatively hard lens is processed or the removal amount is relatively large, the clamping force needs to be large, so that mechanical clamping is suitable. In addition, for small lenses, the vacuum force is too small, the vacuum force is influenced by the area of the processed lens, the smaller the lens is, the smaller the contact area is, the smaller the vacuum force is, and the phenomenon of follow-up rotation or lens running in the clamp can occur in the processing process.

When the removal amount is large, or the stress in the machining process is large, and parts are small, if the traditional vacuum adsorption is adopted to clamp the lens, the phenomena of lens follow-up rotation and large lens running in the clamp can occur in the machining process, and the precision is very poor. The vacuum suction depends on the surface area of the contacting part, since P ═ F/S, and then the suction F ═ P ═ S, and at a given pressure, the suction depends entirely on the size of the part. The parts are small, the adsorbed surface area is small, and the phenomena of follow-up rotation and running can occur naturally. If the clamping force is large, the operation is troublesome, the lens is easy to be placed out of place, and the corresponding precision and consistency are poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a pneumatic mechanical fixing device, can avoid taking place the phenomenon that the part was with changeing or was run the position, and the commonality is strong.

In order to achieve the above object, the technical solution of the present invention is:

an aero-mechanical fixation device comprising: the device comprises a base body, a piston, a support, a spring and an elastic clamp;

an accommodating cavity and a vent hole are arranged in the base body, the accommodating cavity is communicated with the vent hole, and the piston is arranged in the accommodating cavity of the base body; the support is arranged above the base body and the piston and is fixedly connected with the base body; the spring is arranged in the support, one end of the spring is connected with the support, and the other end of the spring is connected with the piston;

the elastic clamp comprises a clamping block and a positioning block, the clamping block is of a hollow structure, the positioning block is arranged in the clamping block, the positioning block is in abutting connection with the side wall of the clamping block, and the positioning block is fixedly connected with the piston; the upper end of the side wall of the clamping block is provided with a slot; the cross sectional area of one end, close to the support, of the clamping block is larger than that of one end, far away from the support, of the clamping block.

Preferably, the support is fixedly connected with the base body through screws.

Preferably, a sealing ring is arranged at the joint of the piston and the base body.

Preferably, the piston is subjected to an urging force greater than the spring force of the spring.

Preferably, the pushing force applied to the piston is 1.5-2 times of the spring force of the spring.

Preferably, the spring is a compression spring.

Preferably, the base body comprises a base and a connecting block, the connecting block is arranged below the base, the accommodating cavity is arranged in the base, and the vent hole is arranged in the connecting block.

Preferably, the connecting block is sleeved with a sealing ring.

Preferably, the sealing ring is made of silica gel or fluororubber.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model has the following beneficial effect:

the utility model provides a pneumatic machinery fixing device, when processing the finding, avoid taking place the part and follow the phenomenon of changeing or running the position, also solved simultaneously when processing harder part or getting rid of the great part of volume, the part follows in the anchor clamps and changes, and processing texture is inhomogeneous and coarse problem. Evenly distributed fluting on the elastic fixture has even atress to the circumference of lens, and the deflection of circumference is also more even, can all carry out the centre gripping to the lens of different diameters, and application scope is wider. The pneumatic device is the same as a common cylinder in pneumatic mode, is conveniently connected with a common air source in an external mode, and can be achieved without a vacuum air source.

Drawings

Fig. 1 is a schematic structural view of a pneumatic mechanical fixing device of the present invention.

Fig. 2 is an exploded view of the pneumatic mechanical fastening device of the present invention.

Fig. 3 is a schematic structural diagram of the pneumatic mechanical fixing device of the present invention in a part clamping state.

Fig. 4 is a schematic structural view of the pneumatic mechanical fixing device of the present invention in a state of loose and detachable parts.

Description of reference numerals:

the device comprises a base body 1, a base 11, a connecting block 12, a piston 2, a support 3, a spring 4, an elastic clamp 5, a clamping block 51, a groove 511, a positioning block 52, a sealing ring 6, a screw 7 and a part 8.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to the drawings, an aerodynamic mechanical fastening device comprising: base member 1, piston 2, support 3, spring 4 and elastic clamp 5. Support 3 sets up in the top of base member 1 and piston 2, support 3 and base member 1 fixed connection, and support 3 passes through screw 7 fixed connection with base member 1. The support 3 is used for supporting the elastic clamp 5 and guiding the elastic clamp 5 along the axis, and is connected with the base body 1 through a fixing screw 7.

An accommodating cavity and a vent hole are arranged in the base body 1, and the accommodating cavity is communicated with the vent hole. Base member 1 includes base 11 and connecting block 12, and connecting block 12 sets up in the below of base 11, holds the cavity setting in base 11, and piston 2 sets up in the cavity that holds of base member 1, and piston 2 is provided with sealing washer 6 with the junction of base member 1. A vent is provided in the connecting block 12. The vent hole is used as an air inlet of the device, and the connecting block 12 is connected with an external air supply device. In order to improve the air tightness of the joint of the connecting block 12 and an external air supply device, a sealing ring 6 is sleeved on the connecting block 12. The sealing ring 6 is made of silica gel or fluororubber.

The substrate 1 is made of stainless steel materials, the substrate 1 is a cylindrical rotary body, and through holes are drilled along the axis of the substrate 1 to form vent holes. The base body 1 also functions as a cylinder body in which the piston 2 reciprocates, and the area of the cylinder body is set as required. The piston 2 is pushed by the air supply device to be larger than the force of the spring 4, so that the piston 2 can move upwards smoothly, the elastic clamp 5 is opened, and the part 8 is conveniently taken and placed. Of course, the upward movement force of the piston 2 can be adjusted by adjusting the pressure of the air inlet and the air outlet of the air supply device.

The piston 2 pushes the elastic clamp 5 to make the elastic clamp 5 in a relaxed state (an open state), so as to facilitate taking and placing the part 8. The area of the piston 2 is as large as that of the base 1 as possible, so that the upward movement force of the piston 2 can be increased. The pushing force applied to the piston 2 is greater than the force of the spring 4, and preferably, the pushing force applied to the piston 2 is 1.5 times to 2 times of the force of the spring 4.

Spring 4 sets up in support 3, and spring 4's one end is connected with support 3, and spring 4's the other end is connected with piston 2. The spring 4 is used for resetting the spring 4 when the piston 2 stops acting, so that the elastic clamp 5 is tensioned, and the lens is clamped. The spring 4 may be a compression spring.

The elastic clamp 5 is made of nylon materials or polyformaldehyde materials, and is matched with the piston 2 and the spring 4 to clamp and release the part 8. The elastic clamp 5 comprises a clamping block 51 and a positioning block 52, the clamping block 51 is of a hollow structure, the positioning block 52 is arranged in the clamping block 51, the positioning block 52 is in abutting connection with the side wall of the clamping block 51, and the positioning block 52 is fixedly connected with the piston 2; the upper end of the side wall of the clamping block 51 is provided with a slot 511; the cross-sectional area of the end of the clamping block 51 close to the holder 3 is larger than the cross-sectional area of the end of the clamping block 51 remote from the holder 3.

According to the pneumatic mechanical fixing device, a base body 1 is connected with an air supply device, an accommodating cavity of the base body 1 serves as a cylinder body of a piston 2, and the piston 2 reciprocates in the accommodating cavity of the base body 1. And the sealing rings 6 on the base body 1 and the piston 2 are used for sealing pneumatic driving gas. The piston 2 is moved upward by the urging force of the air supply device through the vent hole, overcoming the pressure of the spring 4. The positioning block 52 on the elastic clamp 5 moves upwards along with the upward movement of the piston 2, and the clamping block 51 in the elastic clamp 5 is released because the upper end of the clamping block 51 in the elastic clamp 5 is uniformly provided with the slot 511. During the upward process of the positioning block 52, the upper end of the clamping block 51 is opened, i.e. the part 8 shown in fig. 4 is in a loose state; in the process that the positioning block 52 is downward, the upper end of the clamping block 51 is contracted, the elastic clamp 5 is under the reset action of the spring 4, the positioning block 52 is tensioned downward, and the clamping block 51 is contracted, wrapped and clamped, namely, the part 8 is clamped as shown in fig. 3. The piston 2 and the elastic clamp 5 are fixedly connected through a positioning block 52. When the air pressure disappears, the spring 4 pushes the piston 2 downwards, and the elastic clamp 5 is tensioned downwards to realize the function of fixing the part 8.

The pneumatic mechanical clamp is simple to assemble, can clamp a small lens, and has a large clamping force. The device pushes the piston 2 through pneumatics, realizes unloading the pine of elastic fixture 5 by the reciprocating motion of piston 2, compresses tightly through elastic fixture 5 and realizes the dress card to the lens. Evenly distributed fluting 511 on the elastic fixture 5 has even atress to the circumference of lens, and the deflection of circumference is also more even, can all carry out the centre gripping to the lens of different diameters, and application scope is wider. The pneumatic device is the same as a common cylinder in pneumatic mode, is conveniently connected with a common air source in an external mode, and can be achieved without a vacuum air source.

The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. An aerodynamic mechanical fastening device, comprising: the device comprises a base body, a piston, a support, a spring and an elastic clamp;

2. An aero-mechanical fastening device as claimed in claim 1 wherein: the support and the base body are fixedly connected through screws.

3. An aero-mechanical fastening device as claimed in claim 1 wherein: and a sealing ring is arranged at the joint of the piston and the base body.

4. An aero-mechanical fastening device as claimed in claim 1 wherein: the piston is subjected to an urging force greater than the spring force of the spring.

5. An aero-mechanical fastening device as claimed in claim 1 wherein: the pushing force applied to the piston is 1.5-2 times of the spring force of the spring.

6. An aero-mechanical fastening device as claimed in claim 1 wherein: the spring is a pressure spring.

7. An aero-mechanical fastening device as claimed in claim 1 wherein: the base member includes base and connecting block, the connecting block sets up the below of base, the holding cavity sets up in the base, the air vent sets up in the connecting block.

8. An aero-mechanical fastening device according to claim 7 wherein: and a sealing ring is sleeved on the connecting block.

9. An aero-mechanical fastening device according to claim 3 or 8 wherein: the sealing ring is made of silica gel or fluororubber.