3results about How to "Big jacking force" patented technology

The utility model discloses an injection mold frame system for preparing a small multi-cavity thin-wall plastic part, which relates to the technical field of injection molds, and comprises a movable mold seat, a fixed mold seat matched with each other for use is arranged at the upper part of the movable mold seat, a plurality of thimbles are mounted in the middle of the movable mold seat through bolts, and adjusting mechanisms are arranged at the end parts of the plurality of thimbles. After the positioning rod at the bottom end of the connecting piece is embedded into the groove body, the threaded sleeve is rotated to drive the threaded piece to get close to the connecting piece and be tightly attached to the connecting piece, so that fixing of the ejector pin end assembly is completed, when replacement is needed, the threaded sleeve is rotated reversely to enable the threaded piece to be separated from the connecting piece, and the ejector pin end assembly is replaced. By means of the design, abrasion or shape adaptation adjustment of the end of the ejector pin does not need to be integrally disassembled, only the end of the ejector pin needs to be locally disassembled and assembled, the maintenance time is remarkably shortened, the ejector pin structure is particularly suitable for the scene that an ejection end structure needs to be frequently replaced in a multi-cavity mold, and the production efficiency is improved.

This invention belongs to the technical field of tunneling equipment, specifically disclosing a tunneling machine main unit and a tunneling machine. The main unit of the tunneling machine includes a cutterhead and a shield. A jacking mechanism is hinged to the front partition of the shield via a universal hinge structure. The jacking mechanism includes a jacking body and a jacking drive device for driving the jacking body to move forward to jack the tunnel face. The cutterhead is provided with a clearance hole for avoiding the jacking body. The tunneling machine includes the aforementioned main unit. This invention achieves universal swing of the jacking mechanism through the universal hinge structure, enabling the jacking body to jack the tunnel face at different angles, providing the shield with a counter-thrust force in any direction (up / down / left / right), assisting the shield in adjusting its attitude in different directions. If shield jamming occurs, regardless of the location of the jam, the jacking mechanism can provide the shield with the necessary counter-thrust force, thereby solving the problems of shield attitude adjustment and main unit retraction difficulties.

The utility model provides a kind of large-diameter double-wall drill rod of adopting mortise socket sealing connection structure, by outer drill rod and inner tube constitute, inner tube is kept fixed in the center of outer drill rod inner hole with support frame, the internal space of outer drill rod is divided into two passages of inner tube hole and double-wall sandwich between inner tube outer wall and outer drill rod inner wall;The front end of the outer drill rod body is equipped with mortise joint outer sleeve, the rear end is equipped with socket joint outer sleeve, the rear end of the socket joint outer sleeve is equipped with several mortises, the front end of the mortise joint outer sleeve is equipped with several occlusal blocks matched with the mortises;The outer diameter of the front end of the inner tube body matches the inner diameter of the rear end of the tube body.The utility model is applied to the hole outer driving micro-top pipe technology of the company, adopts inner and outer double-tube structure, divides the internal space of outer drill rod into two passages of inner tube hole and double-wall sandwich, replaces the grouting pipeline and sludge pipeline of traditional top pipe machine, greatly simplifies equipment structure.