CN103112199B - A cam jacking mechanism - Google Patents

Abstract

The present invention discloses a cam ejection mechanism, which comprises a plurality of ejection rods and a transmission shaft pivotally arranged on a frame, wherein a plurality of cams are fixedly mounted on the transmission shaft, wherein the outer edges of the cams press against the ejection rods, thereby causing the ejection rods to rise, and the ejection rods are pressed to move by the operation of the cams, and the ejection rods are caused to produce a lifting stroke by the change in the curvature of the outer edge when the cams rotate. Since the cams have a high rotation speed and good rigidity, the ejection speed is fast and the efficiency is high, and the structure is simple and easy to maintain.

Description

A cam jacking mechanism

technical field

The invention relates to a press, in particular to a cam ejector mechanism.

Background technique

Press machine tools are one of the important components of industrial basic equipment, and are widely used in important industrial sectors such as aerospace, automobile manufacturing, transportation, metallurgy and chemical industry. For an industrially developed country, the technical level and possession of press machine tools are an important symbol of its industrial development level.

The press machine tool needs to eject the workpiece from the mold after forging the workpiece. The mechanism for ejecting the workpiece is the ejector mechanism. The mechanical ejector mechanism has the advantages of fast speed and high efficiency. Thereby the present inventor has designed a kind of ejecting mechanism that adopts cam ejecting material, through the operation of cam and the movement of pressing ejector rod, the radian change of the outer edge when cam rotates makes ejector rod produce lifting stroke, because the cam speed is high, rigidity Good, so its ejection speed is fast and the efficiency is high.

Contents of the invention

In order to overcome the deficiencies of the prior art, the invention provides a cam ejector mechanism.

The technical solution adopted by the present invention to solve its technical problems is:

A cam ejector mechanism, characterized in that it includes several ejector rods and a transmission shaft pivotally arranged on the frame, and several cams are fixedly installed on the transmission shaft, and the outer edges of the cams are connected with the ejector rods. Top pressure, so that the ejector rod rises.

The ejector rod is guided up and down by a linear bearing arranged in the frame.

The end of the ejector rod is provided with a connecting block, and the connecting block is provided with an accommodating groove, and a roller pivotally connected with the connecting block is arranged in the accommodating groove, and the cam presses against the roller.

The cam includes a first half-wheel and a second half-wheel, the first half-wheel is provided with a first half-ring fixing portion, the second half-wheel is provided with a second half-ring fixing portion, and the cam is fixed by the first half-ring part and the second half-ring fixing part lock the transmission shaft and fix it.

The first half-ring fixing part and the second half-ring fixing part are connected by screws to lock the transmission shaft.

The beneficial effects of the present invention are: the present invention includes several ejector rods and a transmission shaft pivotally arranged on the frame, and several cams are fixedly installed on the transmission shaft, and the outer edges of the cams press against the ejector rods. , so that the ejector rod rises, and the top presses the ejector rod to move through the operation of the cam. When the cam rotates, the arc of the outer edge changes to make the ejector rod produce a lifting stroke. Because the cam speed is high and the rigidity is good, the speed of the ejector is fast. , high efficiency, simple structure and easy maintenance.

Description of drawings

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

Fig. 1 is a perspective view of the present invention;

Fig. 2 is a cross-sectional view of the present invention.

detailed description

Referring to Fig. 1 and Fig. 2, the present invention discloses a cam ejector mechanism, which comprises a plurality of ejector rods 1, a transmission shaft 2 pivotally arranged on the frame, and a plurality of cams 4 are fixedly installed on the transmission shaft 2, The outer edge of the cam 4 presses against the ejector rod, so that the ejector rod 1 rises.

In order to ensure that the ejector rod 1 does not tilt and deviate when it is lifted and lowered, and wear is minimized, the ejector rod is guided by a linear bearing installed in the frame to lift up and down, and can pass through the stamping table 10 that presses the workpiece. The smooth movement of the ejector rod 1 is guaranteed, and the loss is small.

In order to reduce the wear of the cam 4 and the ejector rod 1, the end of the ejector rod 1 is provided with a connecting block 3, and the connecting block 3 is provided with a receiving groove, and a roller 5 pivotally connected with the connecting block 3 is provided in the receiving groove. Described cam and roller 5 presses, and roller 5 can adopt bearing certainly.

As shown in the figure, the cam 4 includes a first half-wheel 8 and a second half-wheel 9, the first half-wheel 8 is provided with a first half-ring fixing part 6, and the second half-wheel 9 is provided with a second half-ring fixing part 7 , and the cam 4 is fixed by the first half ring fixing part 6 and the second half ring fixing part 7 locking the transmission shaft 2, and the first half ring fixing part 6 and the second half ring fixing part 7 are locked by screw connection Transmission shaft 2, through the above structure, the cam 4 can be easily installed on the transmission shaft 2 and disassembled, and more importantly, through the above structure, the relative position of each cam 4 can be freely set and adjusted, because the workpiece itself may It has a concave-convex shape or multiple workpieces are placed on the stamping table. The pressing position of each ejector rod 1 against the workpiece is different, so the stroke of the ejector rod 1 moving to the pressing position of the workpiece is also different. , but in order to ensure that the workpiece is evenly stressed, it is necessary to press the ejector rod 1 of the same workpiece to apply force to the workpiece at the same time, which must be achieved by adjusting the relative position of each cam 4. At the initial position, each cam The convex arcs of 4 are located in different positions. The ejector rod 1 that needs a long stroke to contact the workpiece can first contact the convex arc of the corresponding cam 4, and the ejector rod 1 that requires a short stroke to contact the workpiece can be in contact with the corresponding cam. The convex arc of the cam 4 contacts backward, so that after the transmission shaft 2 rotates at a certain angle, all the ejector rods 1 can simultaneously contact with the surface of the workpiece to apply force to press the workpiece to eject the workpiece from the mold.

The above are only illustrations and descriptions of some preferred embodiments of the present invention, but the implementation of the present invention is not limited by the above embodiments, as long as they achieve the technical effects of the present invention by basically the same means, they all belong to the present invention scope of protection.

Claims (4)

1. a cam material jacking mechanism, it is characterized in that: comprise some ejector beams, the power transmission shaft be hubbed in frame, described power transmission shaft is installed with some cams, pressure is pushed up mutually with ejector beam in the outer of described cam, thus making ejector beam increase, described cam comprises the first half takes turns and the second half wheels, and the first half take turns and are provided with the first semi-ring fixed part, the second half take turns and are provided with the second semi-ring fixed part, and this cam is fixed by the first semi-ring fixed part and the second semi-ring fixed part locking power transmission shaft.

2. a kind of cam material jacking mechanism according to claim 1, is characterized in that: described ejector beam is guided by the linear bearing be arranged in frame and is elevated.

3. a kind of cam material jacking mechanism according to claim 1, is characterized in that: the end of described ejector beam is provided with contiguous block, and contiguous block is provided with holding tank, is provided with the roller with contiguous block pivot joint in holding tank, and described cam and roller top are pressed.

4. a kind of cam material jacking mechanism according to claim 1, is characterized in that: described first semi-ring fixed part and the second semi-ring fixed part are connected by screw and locking power transmission shaft.