CN213532642U

CN213532642U - Quick rotary fixture for grasping and clamping

Info

Publication number: CN213532642U
Application number: CN202021666908.3U
Authority: CN
Inventors: 王承辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-06-25
Anticipated expiration: 2030-08-12

Abstract

The utility model provides a quick clamping rotary fixture capable of quickly clamping workpieces with various shapes and materials, a push-pull driving mechanism is arranged on a revolving body, one end of a pull rod is connected with an upper fixed disc, the other end is connected with the push-pull driving mechanism, a lower fixed disc is fixed on the push-pull driving mechanism, the revolving body, a lower fixed disc, the pull rod, the upper fixed disc and the push-pull driving mechanism rotate coaxially, a plurality of same clamping hands are uniformly distributed along a rotating center, the front part of each clamping hand is a clamping end for clamping workpieces, the rear part is hinged with one end part of a hanging disc connecting rod, a guide rail is arranged in the middle part, one end part of a lower disc connecting rod is hinged with a sliding block sliding along the guide rail, the middle part of the hanging disc connecting rod and the middle part of the lower disc connecting rod are hinged with each other, the other end part of the hanging disc connecting rod is, and controlling the clamping pressure between the clamping hand and the workpiece.

Description

Quick rotary fixture for grasping and clamping

Technical Field

The utility model relates to an anchor clamps that work piece course of working used especially are used for the rotary fixture that the work piece polishing in-process used.

Background

In the process of processing the workpiece, in order to improve the working efficiency, a special clamp needs to be designed for assistance.

CN106808233A discloses a fixture props in constant velocity cardan joint bell shell, including back shaft and at least three along the tightening device of back shaft circumference equipartition, tightening device includes a pull rod, a bracing piece that is on a parallel with the pull rod, cross arrangement and middle part articulated first, two connecting rods, the pull rod sets up on the back shaft along back shaft endwise slip, the bracing piece is located the outside of back shaft, the both ends of first connecting rod are articulated with the one end of pull rod and the one end of bracing piece respectively, the other end of bracing piece is opened there is a spout, it is provided with a slider to slide in the spout, the both ends of second connecting rod are articulated with the front end and the slider of back shaft respectively, the other end and the set of many pull rods establish the adapter sleeve on the back shaft and be connected, still include one and be used for driving the adapter sleeve along the gliding actuating mechanism of back shaft.

CN107695879A discloses a synchronous flexible rotary fixture of quick adjustment trident, including quick spout support arm, rotary disk, directional triangle dish, rotatory axostylus axostyle, directional triangle dish central authorities set up shaft hole A, insert rotatory axostylus axostyle in the shaft hole A, and rotatory axostylus axostyle top sets up rotatory axostylus axostyle top, and in the sunken hole that rotatory axostylus axostyle top inserted rotary disk axle center and set up, the rotatory axostylus axostyle top of sunken hole big-end-up is fixed in sunken hole by quick cutting ferrule registrate after inserting, makes rotatory.

CN104228494A discloses a big dish rotation-free three-jaw pneumatic clamping device of motorcycle tyre dismouting machine, 3 support equipartitions weld the upper plane at the disc base, the axle sleeve welds in the lower plane center department of disc base, be connected with 2 connecting rod subplates through first round pin axle respectively on every support, be connected with the connecting rod through the second round pin axle, the rethread third round pin axle on the connecting rod subplate and the 4 th round pin axle on the connecting rod are connected with the jack catch fixed block, through the fifth round pin axle on the connecting rod subplate and the rectangular hole sliding connection of processing on the slide fixed block of welding on the center cover, at the upper plane fixed mounting jack catch of jack catch fixed block.

The existing clamps are designed for workpieces with specific shapes and running tracks, but in the workpiece polishing work, due to the fact that the shapes of the workpieces are various, one clamp cannot be designed for each workpiece.

Disclosure of Invention

An object of the utility model is to provide a can grab fast and press from both sides rotary fixture of work piece of pressing from both sides multiple shape and material fast.

The utility model discloses a quick grabbing and clamping rotary fixture, which comprises a revolving body and grabbing and clamping hands on the revolving body, wherein the revolving body is driven to rotate by a motor or a pneumatic motor, the revolving body is provided with a push-pull driving mechanism, one end of a pull rod is connected with an upper fixed disc, the other end is connected with the push-pull driving mechanism, a lower fixed disc is fixed on the push-pull driving mechanism, the revolving body and the lower fixed disc, the pull rod, the upper fixing disc and the push-pull driving mechanism rotate coaxially, a plurality of identical grasping and clamping hands are uniformly distributed along a rotating center, the front part of each grasping and clamping hand is a clamping end for clamping a workpiece, the rear part of each grasping and clamping hand is hinged with one end part of the upper disc connecting rod, the middle part of each grasping and clamping hand is provided with a guide rail, one end part of each lower disc connecting rod is hinged with a sliding block sliding along the guide rail, the middle parts of the upper disc connecting rods and the lower disc connecting rods are hinged with each other, the other end part of each upper disc connecting rod is hinged with the corresponding position of the upper fixing.

Preferably, the push-pull driving mechanism is an air cylinder.

Preferably, the push-pull driving mechanism is an air cylinder. The number of the gripper hands is preferably 3-6.

The solid of revolution can be rotatory air feeder's rotor, and this rotor has air inlet connection and return-air connection, communicates through the trachea respectively the air inlet connection and the return-air connection of cylinder, rotatory air feeder's stator has the cylinder inner chamber, and the rotor passes through the bearing to be installed in the cylinder inner chamber of stator, and two spaces are separated into by the sealing washer in the clearance between the wall of cylinder inner chamber and the rotor, and these two spaces communicate the air inlet connection and the return-air connection of rotor respectively to and communicate the air inlet connection and the return-air connection of stator respectively, and the air inlet connection of stator passes through trachea and solenoid valve intercommunication high-pressure air supply, and the return-air connection of stator passes through trachea and solenoid valve intercommunication negative pressure air.

The utility model discloses the pull rod is released to the accessible, enlarges the distance between upper fixed disk and the lower fixed disk, changes the contained angle between hanging wall connecting rod and the lower wall connecting rod to reduce the distance of grabbing tong and rotation center, follow work piece outside centre gripping work piece. For a cylindrical workpiece or a workpiece with a central inner hole, the distance between the gripping and clamping hand and the rotation center can be enlarged by tensioning the pull rod, and the workpiece is clamped from the inner side of the hole of the workpiece. The air cylinder is used as a push-pull driving mechanism to quickly grab and clamp a workpiece, the air pressure of the air cylinder is adjusted at any time according to the shape, material and processing requirements of the workpiece, the clamping pressure between the grabbing and clamping hand and the workpiece is controlled, and the workpiece is prevented from being deformed or loosened.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention having three grippers.

Fig. 2 is a top view of the gripper hand of fig. 1.

Fig. 3 is a sectional view of the rotary gas supply apparatus.

Detailed Description

The clamp shown in the figure comprises a revolving body supporting seat 1, a revolving body 3 and a motor 15 are arranged in the revolving body supporting seat 1, a gear 2 is arranged on the revolving body 3, a rotating shaft of the motor 15 is connected with a gear 14, and the gear 2 is in meshed connection with the gear 14 to drive the revolving body 3 to rotate.

The revolving body 3 is provided with a cylinder 4, the cylinder 4 is provided with a lower fixed disk 13, a piston of the cylinder 4 is connected with a pull rod 12, and the pull rod 12 penetrates through a central through hole of the lower fixed disk 13 and is connected with an upper fixed disk 11. The revolving body 3, the cylinder 4, the lower fixed disk 13, the pull rod 12 and the upper fixed disk 11 coaxially rotate.

The 3 same gripping

hands

21, 22 and 23 are uniformly distributed by taking the rotating shaft as the center, and the gripping

hands

21, 22 and 23 mutually form an included angle of 120 degrees. The front part of each gripping hand 22 is a clamping end 10 for clamping a workpiece, the rear part of the gripping hand 22 is hinged with one end part of the upper disc connecting rod 5, the middle part of the gripping hand 22 is provided with a guide rail 9, one end part of the lower disc connecting rod 7 is hinged with a sliding block 8 sliding along the guide rail 9, the middle parts of the upper disc connecting rod 5 and the lower disc connecting rod 7 are hinged with each other through matching of a shaft and a hole 6, the other end part of the upper disc connecting rod 5 is hinged with a corresponding position of the upper fixed disc 11, and the other end part of the lower disc connecting rod 7 is hinged with a corresponding position of the lower fixed.

As shown in fig. 3, the rotor 3 is a rotor 3 of a rotary air feeder, and the rotor 3 has an air inlet joint 42 and an air return joint 36, which communicate with the air inlet joint and the air return joint of the cylinder 4 through air pipes, respectively. The stator 31 of the rotary air supply device is fixed on the flange 37 or the rotary body supporting seat 1, and the motor 15 can be fixed on the stator 31 or the rotary body supporting seat 1. The stator 31 has a cylindrical inner cavity, the rotor 3 is arranged in the cylindrical inner cavity of the stator 31 through a first bearing 33 and a second bearing 40, a gap formed between the wall of the cylindrical inner cavity and the rotor is provided with a first sealing ring 34 and a second sealing ring 39, a space 41 formed between the first sealing ring 34 and the second sealing ring 39 is communicated with an air return joint 36 of the rotor 3 through a passage positioned in the rotor 3, a space 30 formed between the second sealing ring 39 and the bottom of the cylindrical inner cavity is communicated with an air inlet joint 42 of the rotor 3 through a passage positioned in the rotor 3, an air inlet joint 38 of the stator 31 is communicated with the space 30 formed between the second sealing ring 39 and the bottom of the cylindrical inner cavity, and an air return joint 32 of the stator 31 is communicated with the space 41 formed between the first sealing ring 34 and the second sealing ring 39. The cylindrical inner cavity of the stator 31 is ported with a gland 35 to prevent the first seal 34 from coming loose. The air inlet joint 38 of the stator 31 is communicated with a high-pressure air source through an air pipe and an electromagnetic valve, and the air return joint 32 of the stator 31 is communicated with a negative-pressure air source through an air pipe and an electromagnetic valve.

In operation, the revolving body support base 1 or the flange 37 is mounted on the polishing robot. For a workpiece which can be clamped from the outer side of the workpiece, firstly, the electromagnetic valve communicated with the air return joint 32 is opened, the air cylinder 4 is communicated with a negative pressure air source, the pull rod 12 is tensioned through the action of an air cylinder piston, the distance between the upper fixed disk 11 and the lower fixed disk 13 is reduced, so that the included angle between the upper disk connecting rod 5 and the lower disk connecting rod 7 is changed, 3 clamping

hands

21, 22 and 23 are pushed away from the center at the same time, the

clamping hands

21, 22 and 23 are opened at the same time, after the workpiece is placed between the clamping ends 10 of the clamping

hands

21, 22 and 23, the electromagnetic valve communicated with the air return joint 32 is closed, then the electromagnetic valve communicated with the air inlet joint 38 is opened, the air cylinder 4 is communicated with a high pressure air source, the pull rod 12 is pushed out, the distance between the upper fixed disk 11 and the lower fixed disk 13 is enlarged, the 3 clamping hands 21. The tightness of the clamping workpiece can be selected by adjusting the air pressure of the high-pressure air source, so that the problem that the workpiece is deformed or loosened due to too low clamping pressure caused by too high clamping pressure is solved. For a cylindrical, bell-shaped or workpiece with a central inner hole, firstly opening an electromagnetic valve communicated with an air inlet joint 38, connecting an air cylinder 4 into a high-pressure air source, pushing out a pull rod 12 under the action of an air cylinder piston, expanding the distance between an upper fixed disk 5 and a lower fixed disk 7, simultaneously pulling 3

gripping handles

21, 22 and 23 to the center, closing the electromagnetic valve communicated with the air inlet joint 38 after clamping ends 10 of the

gripping handles

21, 22 and 23 are placed in the inner hole of the workpiece, then opening the electromagnetic valve of an air return joint 32, connecting the air cylinder 4 into a negative-pressure air source, tensioning the pull rod 12, reducing the distance between the upper fixed disk 11 and the lower fixed disk 13, simultaneously pushing the

gripping handles

21, 22 and 23 away from the center, and clamping the workpiece by the gripping ends 10 from the inner hole of the workpiece. The tightness of the clamping workpiece can be selected by adjusting the air pressure of the negative pressure air source, so that the problem that the workpiece is deformed or loosened due to too low clamping pressure caused by too high clamping pressure is solved.

The anchor clamps that have 3 tongs are only an embodiment of the utility model, in addition, be more than 3 tongs of tongs and also be feasible, can select the quantity of tongs according to the shape, the material and the processing requirement of work piece, realize best tongs work efficiency.

Claims

1. A rapid gripping and clamping rotary clamp comprises a revolving body and a gripping hand on the revolving body, wherein the revolving body is driven to rotate by a motor or a pneumatic motor, the rotary body is provided with a push-pull driving mechanism, one end of a pull rod is connected with an upper fixed disk, the other end of the pull rod is connected with the push-pull driving mechanism, a lower fixed disk is fixed on the push-pull driving mechanism, the rotary body, the lower fixed disk, the pull rod, the upper fixed disk and the push-pull driving mechanism rotate coaxially, a plurality of identical gripping arms are uniformly distributed along a rotation center, the front part of each gripping arm is a clamping end for clamping a workpiece, the rear part of each gripping arm is hinged with one end part of an upper disk connecting rod, the middle part of each lower disk connecting rod is provided with a guide rail, one end part of each lower disk connecting rod is hinged with a sliding block sliding along the guide rail, the middle part of each upper disk connecting rod and the middle part of each lower disk.

2. The quick clamp rotation clamp of claim 1 wherein the push-pull drive mechanism is a pneumatic cylinder.

3. The rotating quick-grip clamp of claim 1 wherein there are 3-6 gripping hands.

4. The rotary clamp of claim 2, wherein the rotator is a rotor of a rotary air supply device, the rotor has an air inlet joint and an air return joint, the air inlet joint and the air return joint are respectively communicated with the air cylinder through an air pipe, the stator of the rotary air supply device has a cylindrical inner cavity, the rotor is installed in the cylindrical inner cavity of the stator through a bearing, a gap between the wall of the cylindrical inner cavity and the rotor is divided into two spaces by a sealing ring, the two spaces are respectively communicated with the air inlet joint and the air return joint of the rotor and respectively communicated with the air inlet joint and the air return joint of the stator, the air inlet joint of the stator is communicated with a high-pressure air source through an air pipe and an electromagnetic valve, and the air return joint of the stator is communicated with a negative-pressure air source.