CN102069422B - Crankshaft automatic indexing holddown device - Google Patents

Abstract

The invention relates to a crankshaft automatic indexing and pressing device, which includes a bracket, an upper pressing block, a chuck, an electromagnetic brake, an indexing shaft, a shaft seat, and an indexing motor. The bracket is in an "L" shape, one of which is There is a slideway on the right-angle side, and a rotating shaft seat is installed on the other right-angled side. The upper pressing block is installed on the slideway of the bracket, and the indexing rotating shaft is installed in the rotating shaft seat. The upper end is equipped with a chuck, and the lower end is connected with the electromagnetic brake. , the crankshaft is clamped on the chuck and pressed with the upper pressing block. The indexing shaft is driven by the indexing motor through the synchronous pulley and the synchronous belt. Driven by the indexing motor, the chuck is driven to rotate a predetermined angle, and Locked by electromagnetic brake. The utility model has the advantages of compact structure, reliable indexing and positioning, high compacting action efficiency, and reduced labor intensity of the operator, and is especially suitable for indexing and compacting of crankshaft large plate flange holes.

Description

Crankshaft automatic indexing and pressing device

technical field

The invention relates to an indexing and pressing device, in particular to an automatic indexing and pressing device for a crankshaft which uses a rocker drill to drill the flange hole of the crankshaft plate during the production process of the crankshaft.

Background technique

We know that a group of circular holes are evenly distributed on the end face of the large plate flange of the crankshaft. When drilling this group of round holes on the radial drill, it is necessary to use the drill template for indexing. That is, move the gear box of the radial drill so that the drill bit is aligned with the pilot hole on the drilling template, and then drill. This indexing method not only has low indexing accuracy, but also is difficult to realize the automation of drilling on the radial arm drill.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide an automatic crankshaft splitter for drilling crankshaft flange holes with compact structure, reliable indexing and positioning, high pressing action efficiency, and low operator work intensity. Degree of compression device.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a crankshaft automatic indexing and pressing device, which includes a bracket, an upper pressing block, a chuck, an electromagnetic brake, an indexing shaft, a shaft seat, and an indexing motor. Yes: the bracket is in the shape of "L", with a slideway on one right-angled side, and a shaft seat installed on the other right-angled side, and the upper pressing block is installed on the slideway of the bracket, which can slide up and down, and the indexing shaft is installed In the rotating shaft seat, a chuck is installed at the upper end, and the lower end is connected with the electromagnetic brake. The crankshaft is clamped on the chuck and pressed with the upper pressing block. Driven by the large synchronous pulley installed on the indexing shaft, driven by the indexing motor, the chuck is driven to rotate at a predetermined angle and locked by the electromagnetic brake.

The back side of the said slideway in the present invention is provided with a flat plate supporting the lead screw, one end of the upper pressing block is provided with a tip downward, and the other end is provided with a protruding screw hole plate, and the screw hole plate passes through the gap of the bracket and The lead screw is connected and matched, and the rotation of the lead screw can drive the upper pressing block to slide up and down. After the crankshaft is pressed by the upper pressing block, it is locked and fixed by the locking bolt.

The said indexing motor of the present invention is a stepping motor or a servo motor.

When the present invention works, the workpiece crankshaft is clamped on the chuck, and is pressed with the upper pressing block. The chuck and the workpiece rotate through the specified angle under the driving of the indexing motor, so that the position to be drilled on the flange of the crankshaft is aligned with the drill bit, and the indexing action is completed. Then the indexing shaft and the chuck are braked and locked by the electromagnetic brake, and the drill bit performs the drilling operation.

The present invention adopts the above-mentioned structure, compared with the prior art, it has compact structure, reliable indexing and positioning, high efficiency of pressing action, shortens the auxiliary time of the processing process, reduces the labor intensity of the operator, and is especially suitable for drilling crankshaft large disc method The blue hole is divided and pressed for use.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention.

The labels in the figure are: 1. Upper pressing block, 2. Lead screw, 3. Locking bolt, 4. Bracket, 5. Chuck, 6. Shaft seat, 7. Indexing shaft, 8. Electromagnetic brake, 9. .Large synchronous pulley, 10. Proximity switch, 11. Round nut, 12. Flat key, 13. Circlip for shaft, 14. Signal plate, 15. Timing belt, 16. Small synchronous pulley, 17. Bolt, 18. Motor mount, 19. Indexing motor, 20. Crankshaft.

Detailed ways

As can be seen from Figure 1, a crankshaft automatic indexing and pressing device includes an upper pressing block 1, a screw 2, a locking bolt 3, a bracket 4, a chuck 5, a rotating shaft seat 6, and an indexing rotating shaft 7 , Electromagnetic brake 8, indexing motor 19, etc.

Described support 4 is " L " right-angled shape, and its one right-angled side is provided with slideway, and rotating shaft seat 6 installation holes and indexing motor 19 installation holes are arranged on the other right-angled side. Upper pressing block 1 is installed on the slideway of support 4, can slide up and down. The indexing rotating shaft 7 is installed in the rotating shaft seat 6, and the indexing motor 19 is installed on the motor mount 18 fixed on the support 4 by bolts 17. Specifically, there is a flat plate on the back side of the slideway for supporting the screw 2, one end of the upper pressing block 1 is provided with a tip downward, and the other end is provided with a protruding screw plate, and the screw plate passes through the gap of the bracket 4 Connected with the leading screw, turning the leading screw 2 can drive the upper pressing block 1 to slide up and down. After the upper compression block 1 compresses the crankshaft 20, it is locked and fixed by the locking bolt 3.

Said rotating shaft seat 6 is fixed on the rotating shaft seat mounting hole of support 4, and the indexing rotating shaft 7 is installed in the rotating shaft seat 6, and its upper end is equipped with the chuck 5 that is used for clamping crankshaft 20, and the lower end is connected with electromagnetic brake 8, and uses circular Nut 11 is locked. The crankshaft 20 is clamped on the chuck 5 and pressed with the upper pressing block 1 . Indexing rotating shaft 7 is driven by indexing motor 19 through small synchronous belt pulley 16, synchronous belt 15 and the large synchronous belt wheel 9 that is installed on the indexing rotating shaft 7. Large synchronous belt pulley 9 is installed on the index rotating shaft 7 lower ends by flat key 12.

Driven by the indexing motor 19, after turning over a specified angle, the indexing motor 19 stops rotating, and the electromagnetic brake 8 energizes and brakes the indexing rotating shaft 7. And locked by electromagnetic brake. Below the indexing shaft 7, a signal disc 14 and a proximity switch 10 are also installed through a circlip 13 for the shaft to control the feed action of the spindle of the radial arm drill.

The said indexing motor 19 of the present invention is a stepping motor or a servo motor.

When the present invention works, the workpiece crankshaft is clamped on the chuck, and is pressed with the upper pressing block. The chuck and the workpiece rotate through the specified angle under the driving of the indexing motor, so that the position to be drilled on the flange of the crankshaft is aligned with the drill bit, and the indexing action is completed. Then the indexing shaft and the chuck are braked and locked by the electromagnetic brake, and the drill bit performs the drilling operation. It has compact structure, reliable indexing and positioning, high efficiency of pressing action, shortens the auxiliary time of the processing process, and reduces the labor intensity of the operator. It is especially suitable for indexing and pressing of crankshaft flange holes.

Claims (1)

1. bent axle automatic indexing hold down gag, it comprises support, goes up compact heap, chuck, electromagnetic brake, calibration rotating shaft, shaft seat, indexing motor, and it is characterized in that: said support is L-shaped; The one of which right-angle side is provided with slideway, on another right-angle side shaft seat is installed, and last compact heap is installed on the slideway of support; Can slide up and down, the calibration rotating shaft is installed in the shaft seat, and its upper end is equipped with chuck; The lower end is connected with electromagnetic brake, and bent axle is clamped on the chuck, and uses compact heap and compress; The calibration rotating shaft by indexing motor through small synchronous pulley, synchronously with and the big synchronous pulley that is installed in the calibration rotating shaft drive; Under indexing motor ground drives, drive chuck and rotate predetermined angle, and lock by electromagnetic brake; The back side of said slideway be provided with one support leading screw flat board, last compact heap one end is top to having, the other end has and outwards is provided with outstanding screw plate, the breach that screw plate passes support is connected cooperation with leading screw, rotational lead screw can drive compact heap and slide up and down.

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