CN210970074U

CN210970074U - Lower ejection device for press

Info

Publication number: CN210970074U
Application number: CN201921528906.5U
Authority: CN
Inventors: 法泽程; 于镇玮; 杨景涛
Original assignee: Qingdao Hongda Metal Forming Machinery Co ltd
Current assignee: Qingdao Hongda Metal Forming Machinery Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-07-10
Anticipated expiration: 2029-09-16

Abstract

The utility model provides a lower ejecting device for press, including the pneumatic cylinder support, the pneumatic cylinder, ejecting support, the round pin axle, install the hydraulic lubrication hose on round pin axle center lubrication hole through the pipeline joint, install at the epaxial ejecting crossbeam of round pin, the copper sheathing, the convex end cover, fastening nut, the lower part pneumatic cylinder connecting rod that links together with ejecting crossbeam, the upper portion pneumatic cylinder connecting rod that is connected with the pneumatic cylinder piston rod and links together with lower part pneumatic cylinder connecting rod simultaneously, a lower part guide bracket for upper portion pneumatic cylinder connecting rod direction, an upper portion guide bracket for pneumatic cylinder piston rod direction, lower ejector pin, the direction copper sheathing, lie in the direction copper sheathing and install the last ejector pin at ejector pin top down. The utility model discloses ejecting device down for the press, ejection force is big, safe and reliable, long service life, easy operation, the plant maintenance is easy, easy maintenance, and the wearability is good. The method can be widely applied to presses, in particular to screw presses and hot die forging presses.

Description

Lower ejection device for press

Technical Field

The invention relates to a lower ejection device for a press, which can be widely applied to presses, in particular to screw presses and hot die forging presses.

Background

At present, according to the traditional push-out device under the press machine, a hydraulic cylinder is directly installed at the central position of the bottom of a base of the press machine equipment, a piston rod of the hydraulic cylinder and a push-out rod are on the same axis, the piston rod is directly connected with the push-out rod, and the push-out device directly pushes out materials through the movement of the hydraulic cylinder. At present, the material pushing device is only used on a small quantity of small mechanical presses with low requirement on the material pushing force. In addition, with the structure, because of the installation position, if no special protection device is added, impurities such as graphite emulsion, oxide skin and the like can be accumulated around the piston rod, so that the piston rod is damaged, and phenomena such as oil leakage, weak ejection and the like occur. If the damage occurs, maintenance personnel need to go to the basic pit to maintain, and a lot of water, oil, oxide skin and other pollutants are in the pit, and the disassembly is very troublesome. At least 8 hours are required for maintenance and replacement of the seal member at ordinary times. If the water in the pit is not discharged in time, the hydraulic cylinder is submerged, and the damage is easily caused.

Disclosure of Invention

The invention aims to provide the lower ejection device for the press, which has the advantages of large ejection force, safety, reliability, long service life, simplicity in operation, easiness in equipment maintenance, convenience in maintenance and good wear resistance.

In order to achieve the above purpose, the invention relates to a downward ejection device for a press machine, which comprises a hydraulic cylinder support vertically arranged on the side surface of a press machine base, a hydraulic cylinder arranged on the hydraulic cylinder support, an ejection bracket arranged on the bottom surface of the press machine base through a fastening bolt, a pin shaft internally provided with a central lubricating hole, a longitudinal lubricating hole and an outer lubricating groove which are communicated, a stop boss arranged at one end, an external thread arranged at the other end and capable of being inserted into an inner hole of the ejection bracket for positioning, a hydraulic lubricating hose arranged on the central lubricating hole of the pin shaft through a pipeline joint, an ejection cross beam arranged on the pin shaft, a copper sleeve arranged between the pin shaft and the ejection cross beam and arranged on the inner hole of the ejection cross beam, a convex end cover inserted into the tail end part of the pin shaft and tightly arranged on the side part of the bracket, a fastening, the upper hydraulic cylinder connecting rod is connected with a hydraulic cylinder piston rod and is simultaneously connected with a lower hydraulic cylinder connecting rod through a pin, a lower guide support which is arranged on the side face of a press machine base and used for guiding the upper hydraulic cylinder connecting rod, an upper guide support which is arranged on the side face of the press machine base and used for guiding the hydraulic cylinder piston rod, a lower ejection rod, the tail end of which is positioned in an ejection cross beam hole groove and positioned in a center hole of the lower part of the press machine base, a guide copper sleeve, and an upper ejection rod, wherein the guide copper sleeve is arranged in the upper center hole of the press machine base, and the upper ejection rod is.

The invention relates to a lower ejection device for a press, wherein an interference fit copper sleeve is arranged on the outer circumference of a pin.

The lower ejection device for the press machine is characterized in that the ejection cross beam is connected with a plurality of lower ejection rods so as to realize multi-station ejection.

The invention relates to a lower ejection device for a press, which has the working principle that: when the ejection is needed, the hydraulic cylinder starts to work, the piston rod of the hydraulic cylinder starts to move upwards, then the ejection cross beam is driven to move upwards by taking the pin shaft as a pivot through the upper hydraulic cylinder connecting rod and the lower hydraulic cylinder connecting rod, the ejection cross beam pushes the lower ejection rod and the upper ejection rod to move upwards, and the ejection action is completed. Then, the piston rod of the hydraulic cylinder starts to descend, and the upper ejector rod returns to the original position, so that one working cycle is completed.

According to the lower ejection device for the press, the ejection support and the ejection cross beam are connected in a hinge mode, the ejection cross beam takes the pin shaft as a fulcrum, and the ejection power arm is longer. The lower ejection rod and the middle connecting point of the ejection beam form an ejection force point, and the lower hydraulic cylinder connecting rod and the tail end connecting point of the ejection beam form a force application point. That is, the ejection force point and the force application point are not on the same straight line. Because the power arm of the ejection force point is longer, under the condition that the diameters of the piston rods of the hydraulic cylinders are the same, compared with the traditional structure technology, the structure has the characteristic of labor saving, and the ejection force of the hydraulic cylinder is 1.9-2.1 times of that of the traditional technology. Therefore, the ejection force is large.

The lower ejection device for the press machine adopts the upper guide bracket and the lower guide bracket, so that the driving is safe and reliable, and the service life is long.

The lower ejection device for the press machine is safe and reliable in ejection and long in service life because the press machine base is provided with the guide hole, the upper ejector rod and the lower ejector rod.

The lower ejection device for the press machine is driven by the hydraulic cylinder, is simple to operate, easy to maintain and convenient to maintain, and can save at least two thirds of time.

In order to prevent excessive wear, the pin is provided with lubricating points, and all the lubricating points are provided with hydraulic hoses to automatically lubricate moving parts, so that the wear is reduced, and the service life is prolonged.

The lower ejection device for the press machine, disclosed by the invention, has the advantages that the copper sleeve and the guide copper sleeve are good in wear resistance when being respectively matched with related steel parts.

In conclusion, the lower ejection device for the press machine is large in ejection force, safe, reliable, long in service life, simple to operate, easy to maintain, convenient to maintain and good in wear resistance.

Drawings

The invention will be further described with reference to the accompanying drawings and examples thereof.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a partially enlarged structural view of a portion B in fig. 2.

Detailed Description

In fig. 1 to 3, the downward ejection device for a press machine of the present invention comprises a hydraulic cylinder support 1 vertically installed on the side of a press machine base 17, a hydraulic cylinder 2 installed on the hydraulic cylinder support, an ejection bracket 3 installed on the bottom surface of the press machine base through a fastening bolt 18, a pin 4 having a locking boss at one end and an external thread at the other end and capable of being inserted into an inner hole of the ejection bracket for positioning, a hydraulic lubrication hose 5 installed on the central lubrication hole of the pin through a pipe joint 19, an ejection beam 6 installed on the pin, a copper bush 7 located between the pin and the ejection beam and installed on the inner hole of the ejection beam, a convex end cap 8 inserted into the end of the pin and installed closely to the side of the bracket, a fastening nut 9 threadedly connected with the pin and fastening the convex end cap and the pin to the ejection bracket, a lower hydraulic cylinder connecting rod 10 connected with the ejection beam by a pin 20, an upper hydraulic cylinder connecting rod 11 connected with the hydraulic cylinder piston rod and connected with the lower hydraulic cylinder connecting rod by the pin 20, a lower guide bracket 12 installed on the side surface of the press machine base and used for guiding the upper hydraulic cylinder connecting rod, an upper guide bracket 13 installed on the side surface of the press machine base and used for guiding the hydraulic cylinder piston rod, a lower ejection rod 14 with the tail end positioned in the ejection beam hole groove and positioned in the lower central hole of the press machine base, a guide copper sleeve 15 installed in the upper central hole of the press machine base, and an upper ejection rod 16 positioned in the guide copper sleeve and installed at the top of the lower ejection rod.

It should be understood that the above-described embodiments are merely exemplary of the present invention, and that various changes and modifications in the form, construction, features and spirit of the invention described in the claims should be included in the scope of the invention.

Claims

1. A downward ejection device for a press machine is characterized by comprising a hydraulic cylinder support vertically arranged on the side surface of a press machine base, a hydraulic cylinder arranged on the hydraulic cylinder support, an ejection support arranged on the bottom surface of the press machine base through a fastening bolt, a pin shaft internally provided with a central lubricating hole, a longitudinal lubricating hole and an outer lubricating groove which are communicated, a stop boss arranged at one end, an external thread arranged at the other end and capable of being inserted into an inner hole of the ejection support for positioning, a hydraulic lubricating hose arranged on the central lubricating hole of the pin shaft through a pipeline joint, an ejection cross beam arranged on the pin shaft, a copper sleeve arranged between the pin shaft and the ejection cross beam and arranged on the inner hole of the ejection cross beam, a convex end cover inserted into the tail end part of the pin shaft and arranged close to the side part of the support, a fastening nut which is in threaded connection with the pin shaft, the upper hydraulic cylinder connecting rod is connected with a hydraulic cylinder piston rod and is simultaneously connected with a lower hydraulic cylinder connecting rod through a pin, a lower guide support which is arranged on the side face of a press machine base and used for guiding the upper hydraulic cylinder connecting rod, an upper guide support which is arranged on the side face of the press machine base and used for guiding the hydraulic cylinder piston rod, a lower ejection rod, the tail end of which is positioned in an ejection cross beam hole groove and positioned in a center hole of the lower part of the press machine base, a guide copper sleeve, and an upper ejection rod, wherein the guide copper sleeve is arranged in the upper center hole of the press machine base, and the upper ejection rod is.

2. The bottom knock-out apparatus for presses of claim 1, wherein the pin has an interference fit copper sleeve on its outer circumference.

3. The lower ejection device for the press machine according to claim 1, wherein the ejection beam is connected to a plurality of lower ejection rods to perform multi-station ejection.