3results about How to "Improve rollback efficiency" patented technology

The utility model discloses a bone sawing machine convenient to feed, which belongs to the technical field of food processing equipment and comprises a machine frame, a working face and a saw blade driven by a motor, a sliding rail for guiding the working face to slide close to the saw blade is fixedly arranged on the machine frame, and a receding groove is formed in the working face. A safety plate sliding along the receding groove and an operation piece are arranged on the working face, the safety plate and the operation piece are of an L-shaped structure to form a material clamping space in a surrounding mode, a plurality of side plate spikes and bottom plate spikes are fixedly arranged on one side of the material clamping space, and the included angle between the safety plate and the operation piece on one side of the material clamping space can be reduced through the safety plate and the operation piece. According to the bone sawing machine convenient to feed, in the process that an operator returns food by translating the operating piece, the operator enables the food to be far away from the saw blade on the premise that the operator does not make contact with the food, the operator does not need to do redundant hand actions, the returning efficiency is high, and safety is achieved.

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.

This invention relates to a retraction mechanism and a cutting and sewing device. The retraction mechanism includes a support, a transmission component, a drive assembly, and a retraction assembly. The transmission component is slidably connected to the support and includes multiple first transmission teeth and multiple second transmission teeth. The drive assembly includes a driven gear and a motor. When the driven gear is in the meshing position, it is connected to the multiple first transmission teeth. When the driven gear is in the disengaged position, it is disengaged from the multiple first transmission teeth. The retraction assembly is driven by the driven gear and includes a drive rod and a drive gear. The drive rod is rotatably connected to the support, and the drive gear is driven by the drive rod. When the drive gear is controlled by the drive rod to switch from a first position to a second position, the driven gear switches from the meshing position to the disengaged position, and the drive gear is connected to the multiple second transmission teeth. By converting the rotation of the drive gear into the movement of the transmission component, the retraction of the transmission component is achieved, thus improving the retraction efficiency of the transmission component.