CN2135425Y

CN2135425Y - Electric safety clamp

Info

Publication number: CN2135425Y
Application number: CN 92218721
Authority: CN
Inventors: 徐小宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-16
Filing date: 1992-09-16
Publication date: 1993-06-09
Anticipated expiration: 2002-09-16

Abstract

The utility model relates to an electric safety clamp used for mechanical processing, which is composed of a machine base, a driving mechanism, a force regulating safety mechanism and a tensioning mechanism, wherein, the driving mechanism comprises an electric motor, a cone gear, a worm wheel and a worm screw, the force regulating safety mechanism is a steel ball type safety clutch composed of a safety sub shaft, a safety sub shaft sleeve, a steel ball and a spring, and the tensioning mechanism comprises a tensioning tongue, a pull rod, a cylindrical pin, a positioning element, screw nuts, a screw bolt and a connecting shaft. Due to the adoption of the spiral tensioning mechanism, the self-locking capability is provided, and the use is safe. The utility model can be matched with various machine tools.

Description

Electric safety clamp

The utility model relates to a kind of machining turning attachment, particularly a kind of electric safe anchor clamps.

At present, the turning attachment that processing carries the strain pin hole workpiece mainly contains two kinds, and a kind of is hydraulic clamp, and a kind of is air clamper.They are made up of tension tongue, pin, setting element, pull bar and hydraulic pressure, pneumatic means.Its operation principle is: pin by the tension tongue drive with workpiece on the hole oppress mutually, generation frictional force is not separated pin and hole and workpiece is fixed on the setting element securely, and rotates synchronously with the lathe main shaft.Because these two kinds of anchor clamps do not have latching characteristics, and for the ease of quick workpiece loading and unloading, the fit clearance in pin and hole is big (2.5-3mm) all, when the tension tongue position changes, pin easily flies out from workpiece, causes the accident, perhaps when liquid, gas leakage, power failure, pressure produces fluctuation, and flies the pin accident.In addition, these two kinds of device auxiliary devices are more, and the cost height also is difficult for the microcomputer special purpose lathe supporting.A kind of electric chuck is arranged at present, and it is made of motor, drive link and scroll chuck, because its pawl can only move radially, therefore can only the clamping work pieces cylindrical, and can not be used for the processing of piston and so on workpiece.

The purpose of this utility model is, provide a kind of have self-lock ability, can with the supporting electric safe anchor clamps of microcomputer special purpose lathe.

The utility model is by support, transmission mechanism, the accent dangerous mechanism that tries hard to keep, tensioning mechanism is formed, transmission mechanism comprises motor, conical gear, worm gear, worm screw, tensioning mechanism comprises the tension tongue, pull bar, pin, setting element, pull bar penetrates machine tool chief axis, it is characterized in that: (1) transfer the dangerous mechanism that tries hard to keep be one by insurance axle, insure sub-axle sleeve, steel ball, the steel-ball type overload-release clutch that spring constitutes, it passes through bearing, bearing holder (housing, cover) is fixed on the support, the worm gear of transmission mechanism is assembled into one with the rear end of the sub-axle sleeve of insurance, (2), tensioning mechanism also comprises nut, screw rod, connecting axle, nut is by the screw axial limiting on the support, fixedly connected with the front end of the insurance axle of transferring the dangerous mechanism that tries hard to keep in its rear end, its front end is connected with screw spiral, screw rod is circumferentially located by key and support, screw front end is connected with the rear end of connecting axle by bearing, the fixedly connected back end of tie rod of connecting axle front end.The utility model adopts the spiral tensioning mechanism, has self-lock ability, and the required clamping force of anchor clamps can transfer the dangerous mechanism that tries hard to keep to obtain by adjusting, safe in utilization, simple in structure, be power with the motor, can be suitable for machining piston class workpiece with all kinds of common supporting with the microcomputer special purpose machine tool.

In order to prevent that pull bar from taking place loosening or during fracture, tightening force disappears, pin flies out, so that it is perfectly safe to accomplish, the further feature of the utility model be with machine tool chief axis flange connecting dish on install additional by burst disk, slip ring and laterally zygomorphic lever, lever shaft, on the double insurance release mechanism formed of lower push rod, push rod spring.

With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.

Fig. 1 is the utility model overall structure schematic diagram.

As shown in Figure 1, the utility model is by support 33, transmission mechanism: motor 1, conical gear 32, worm gear 29, worm screw 31, the accent dangerous mechanism that tries hard to keep: by insurance axle 30, insure sub-axle sleeve 28, steel ball 25, the steel-ball type overload-release clutch that spring 24 constitutes, tensioning mechanism: tension tongue 7, pull bar 17, pin 8, setting element 6, nut 23, screw rod 22, connecting axle 18 is formed, the steel-ball type overload-release clutch is by bearing 27, bearing holder (housing, cover) 26 is fixed on the support 33, the worm gear 29 of transmission mechanism is assembled into one with the rear end of the sub-axle sleeve 28 of insurance of steel-ball type overload-release clutch, in the tensioning mechanism, nut is by screw 21 axial limitings on the support 33, fixedly connected with the front end of the insurance axle 30 of transferring the dangerous mechanism that tries hard to keep in its rear end, its front end is connected with screw rod 22 spirals, screw rod 22 is circumferentially located by key 20 and support 33, screw rod 22 front ends are connected with the rear end of connecting axle 18 by bearing 19, the fixedly connected pull bar of connecting axle 18 front ends 17 rear ends, pull bar 17 penetrates machine tool chief axis 16, tension tongue 7, setting element 6 is contained in pull bar 17 front ends, and pin 8 inserts in the pin-and-hole of tension tongue 7.

The utility model course of work is as follows: workpiece places on the setting element; machine operation; drive transmission mechanism; transmission mechanism drives the nut rotation of sub-axle of the insurance of transferring the dangerous mechanism that tries hard to keep and tensioning mechanism; insure sub-axle sleeve the moment of torsion rotating speed that worm gear passes over is passed to insurance axle by steel ball by the moment of torsion of setting up; when insuring son axle required torque greater than the setting moment of torsion; steel ball makes the sub-axle sleeve idle running of insurance with pressuring spring; thereby off-load protection screw mechanism is without prejudice; make tightening force keep stable; because nut axial limiting on support; screw rod is circumferentially located by key and support; therefore the rotation of nut becomes moving axially of screw rod, and by connecting axle tightening force is passed to pull bar, drives tension tongue clamping work pieces.

The double insurance release mechanism that the utility model installs additional is still shown in Figure 1, form by

burst disk

3,5, slip ring 4, laterally zygomorphic lever 14, lever shaft 11, upper ejector pin 13, upper ejector pin spring 12, lower push rod 9,10, lower push rod 10 springs 15, be installed at machine tool chief axis 16 flange connecting dishes 2 on.Ring flange 2 is fixedlyed connected by screw with dish 5 successively with dish 3, dish 3, dish 5 is fixedlyed connected with setting element 6, lever 14 is contained on the dish 3, lower push rod 10 and spring 15 thereof are packed in dish 3 apertures, lower push rod 9 is packed in dish 5 apertures, its front end passes setting element 6, and expose a little, corresponding in opposite directions lever 14 1 ends in lower push rod 10 front ends and lower push rod 9 rear ends, upper ejector pin spring 12 is packed into and is coiled in 5 apertures, and slip ring 4 installs on the dish 3 after assembling with upper ejector pin 13, and upper ejector pin 13 passes aperture on the slip ring 4, its rear end is corresponding with lever 14 other ends, and its front end insertion is coiled in 5 apertures.The operation principle of release mechanism is as follows: when the utility model anchor clamps operate as normal; pull bar moves after being driven by connecting axle; move behind the tension tongue push lower push rod 9; lever makes the slip ring reach by upper ejector pin; break away from main electrical equipment and electrical contact; keep main motor circuit to connect; in case the loosening situation of tension tongue takes place; last lower push rod moves under the spring force effect thereupon; move after making slip ring by lever, contact with main electrical equipment and electrical contact, thereby cut off main motor circuit; shut down, play the double insurance safety effect.

Claims

1, a kind of machining is with electronic safety clamp tool, form by try hard to keep dangerous mechanism, tensioning mechanism of support 33, transmission mechanism, accent, transmission mechanism comprises motor 1, conical gear 32, worm gear 29, worm screw 31, tensioning mechanism comprises tension tongue 7, pull bar 17, pin 8, setting element 6, pull bar penetrates machine tool chief axis 16, it is characterized in that:

(1), transferring the dangerous mechanism that tries hard to keep is a steel-ball type overload-release clutch that is made of insurance axle 30, the sub-axle sleeve 28 of insurance, steel ball 25, spring 24, it is fixed on the support 33 by bearing 27, bearing holder (housing, cover) 26, the worm gear 29 of transmission mechanism is assembled into one with the rear end of the sub-axle sleeve 28 of insurance

(2), tensioning mechanism also comprises nut 23, screw rod 22, connecting axle 18, nut 23 is by screw 21 axial limitings on the support, fixedly connected with the front end of the insurance axle 30 of transferring the dangerous mechanism that tries hard to keep in its rear end, its front end is connected with screw rod 22 spirals, screw rod is circumferentially located by key 20 and support, screw front end is connected the fixedly connected pull bar of connecting axle front end 17 rear ends by bearing 19 with the rear end of connecting axle 18.

2, electric safe anchor clamps according to claim 1 is characterized in that installing additional the double insurance release mechanism of being made up of burst disk 3,5, slip ring 4 and laterally zygomorphic lever 14, lever shaft 11, upper ejector pin 13, upper ejector pin spring 12, lower push rod 9,10, lower push rod 10 springs 15 on machine tool chief axis 16 flange connecting dishes 2.