Scroll chuck
Technical field
The invention belongs to the Machining Technology field, particularly relate to a kind of scroll chuck.
Background technology
Be the scroll chuck schematic diagram of prior art as accompanying drawing 1, it comprises chuck body 0.1, claw 0.2, first bevel gear 0.3 and second bevel gear 0.4; Be provided with the through hole 0.9 for place work piece in the middle of the described chuck body 0.1; Described claw 0.2 is three and is 120 degree angles and evenly is arranged on the claw track 0.5 on the end face of chuck body 0.1; The back side of described second bevel gear 0.4 and 0.3 engagement of first bevel gear and second bevel gear 0.4 is provided with helicla flute 0.6; Described first bevel gear 0.3 is provided with the square hole 0.7 that inserts for spanner away from an end of chuck body 0.1 axis; Described claw 0.2 is provided with a plurality of for the latch 0.8 that is meshed with helicla flute 0.6; When scroll chuck is worked, the square hole that spanner is inserted first bevel gear rotates first bevel gear, drive the rotation of second bevel gear again, the helicla flute at the second bevel gear back side rotates and drives three claws again and do radial motion along the claw track of chuck body, thereby clamps or unclamp workpiece.But this structure can only clamp a position on the workpiece, is difficult to the firm workpiece that clamps, and need pull bevel gear with spanner and rotate, and wastes time and energy, and operating efficiency is lower.
Summary of the invention
Technical problem to be solved by this invention is: a kind of scroll chuck that clamps workpiece that can be firm is provided.
Technical scheme of the present invention is: a kind of scroll chuck, and it comprises device that chuck body, driver card disk body rotate, claw driving mechanism and is driven to clamp or open a plurality of claw by the claw driving mechanism; Described chuck body and driven to clamp or open a plurality of claw is two covers by the claw driving mechanism, and two cover chuck body coaxial lines install, and described claw driving mechanism is a cover, and is connected with driven in synchronism with two cover claws; Described two cover chuck bodies are installed on the frame through bearing, and are connected with the device of driver card disk body rotation.
After adopting above structure, the present invention has following advantage: because chuck body has two covers, workpiece is placed on the chuck body, can makes claw clamp two diverse locations on the axis of workpiece, clamping work pieces that can be more stable by the claw driving mechanism.
As improvement, described claw driving mechanism comprises that the power cylinder that vertically is installed on the bracing frame, the free end of power cylinder piston rod are connected with vertical generating gear, have been coaxially set on the described chuck body and bar generating gear meshed gears; Described gear is installed on the radially annulus at cylindrical drum middle part on the chuck body; Fixedly there is the opposite helicla flute of direction of rotation at described cylindrical drum two ends; Latch engagement on described helicla flute and the cover claw separately.
As improvement, the radial convex loop on the described cylindrical drum is provided with the circular arc through hole; Described two cover chuck body edges are provided with a plurality of and circular arc through hole coaxial line is used for the through hole that alignment pin is located, and can well realize chuck body is positioned by alignment pin.
As improvement, the device that described driver card disk body rotates comprises rack-mounted motor, is installed in synchronous pulley and the synchronous pulley of fixedlying connected with described two cover chuck body coaxial lines on the motor reel; Described two synchronous pulleys can well rotate by the driver card disk body by belt pulley by band connection synchronously.
Description of drawings
Accompanying drawing 1 is the schematic diagram of prior art scroll chuck.
Accompanying drawing 2 is the explosive view of scroll chuck of the present invention.
Accompanying drawing 3 is the schematic diagram of scroll chuck of the present invention.
As shown in the figure, prior art: 0.1, chuck body; 0.2, claw; 0.3, first bevel gear; 0.4, second bevel gear; 0.5, the claw track; 0.6, helicla flute; 0.7, square hole; 0.8, latch; 0.9, through hole.
The present invention: 1, chuck body; 2, claw; 3, bearing; 4, frame; 5, power cylinder; 6, bar generating gear; 7, gear; 8, cylindrical drum; 8.1, helicla flute; 8.2, the circular arc through hole; 9, motor; 10, be with synchronously; 11, alignment pin; 12, through hole; 13, bracing frame.
The specific embodiment
Below in conjunction with accompanying drawing enforcement of the present invention is further described.
A kind of scroll chuck, it comprises device that chuck body 1, driver card disk body rotate, claw driving mechanism and is driven to clamp or open a plurality of claw 2 by the claw driving mechanism; It is characterized in that: described chuck body 1 and driven to clamp or open a plurality of claw 2 is two covers by the claw driving mechanism, and two cover chuck bodies, 1 coaxial line installs, and described claw driving mechanism is a cover, and is connected with driven in synchronism with two cover claws 2; Described two cover chuck bodies 1 are installed on the frame 4 through bearing 3, and are connected with the device of driver card disk body rotation.
Described claw driving mechanism comprises that the power cylinder 5 that vertically is installed on the bracing frame 13, the free end of power cylinder 5 piston rods are connected with vertical generating gear 6, have been coaxially set on the described chuck body 1 and bar generating gear 6 meshed gears 7; Described gear 7 is installed on the radially annulus at cylindrical drum 8 middle parts on the chuck body 1; Fixedly there is the opposite helicla flute of direction of rotation 8.1 at described cylindrical drum 8 two ends; Latch engagement on described helicla flute 8.1 and the cover claw 2 separately.
Radial convex loop on the described cylindrical drum 8 is provided with circular arc through hole 8.2; Described two cover chuck bodies 1 edge is provided with a plurality of and circular arc through hole 8.2 coaxial lines are used for the through hole 12 that alignment pin 11 is located.
The device that described driver card disk body rotates comprises rack-mounted motor 9, is installed in synchronous pulley and the synchronous pulley of fixedlying connected with described two cover chuck bodies, 1 coaxial line on the motor reel; Described two synchronous pulleys are by being with 10 to connect synchronously; Described motor 9 is servomotor, because servomotor has auto-lock function can realize the clamping of workpiece well or unclamp.
The present invention in specific implementation process is: workpiece is placed on the chuck body, bar generating gear and gear engagement, start power cylinder, the motion driven gear of bar generating gear rotates, drive spiral fluted again and rotate, because the latch on the claw and helicla flute engagement, claw can be along the claw orbital motion on the chuck body, thereby can realize clamping automatically or unclamping workpiece, time saving and energy saving; For being slidingly matched, when claw clamped or unclamps workpiece, the sliding power cylinder disengaged bar generating gear and gear left between power cylinder and the bracing frame, can the work of convenient card disk body.And because chuck body has two covers, can clamp two diverse locations of workpiece, more the firm grip workpiece.
Below only be described with regard to most preferred embodiment of the present invention, but can not be interpreted as it is limitations on claims.The present invention not only is confined to above embodiment, and its concrete structure allows to change.All various variations of doing in the protection domain of independent claims of the present invention are all in protection domain of the present invention.