31results about How to "High walking accuracy" patented technology

The invention mainly discloses a linear guide rail. According to a technical scheme of the invention, the linear guide rail comprises a sliding block body and sliding columns which are in slidable connection, wherein two sides of the sliding block body are respectively provided with an automatic clearance adjusting device; and each automatic clearance adjusting device abuts against and matches with a sliding column. According to the invention, the internal structure of the sliding block body is changed from rolling transmission to sliding transmission; the sliding block body and the sliding columns are in slidable connection; a unique connection structure and transmission manner are adopted; two sides of the sliding block body are respectively provided with an automatic clearance adjustingdevice; thus, automatic clearance adjustment can be guaranteed in the normal use process, and sliding members and chutes can be closely matched to guarantee walking precision. The linear guide rail provided by the invention can maintain high walking precision in the operation process of the sliding block body, is simple to install and easy to operate, saves labor and improves work efficiency.

The invention relates to a milling power head of a numerical-control planer type milling machine. The milling power head comprises a slide seat, a lead screw and a spindle box. The spindle box moves vertically along the lead screw, a groove which penetrates through the slide seat from top to bottom is arranged on one side of the slide seat, the lower portion of the spindle box is placed in the groove, a hydraulic balance device is disposed on the top of the slide seat, and the top of the spindle box is hinged with the hydraulic balance device. The milling power head is simple in structure and convenient to operate, the hydraulic balance device assists the spindle box to move vertically, axial force born by the lead screw is relieved, the traveling precision of the lead screw is improved, the service life of the lead screw is prolonged, and the spindle box can vertically move flexibly and is high in heavy cut capacity. Besides, ventilation openings are arranged on two sides and the top of a protecting cover of the spindle box, and circulation reflux of air inside the spindle box is strengthened, so that heat inside the spindle box can circulate to the external, a cooling effect is good, and high precision can be kept even if the milling power head is used for continuous heavy cut for a long time.

The invention relates to a load controllable active type follow-up force-applying linear guide rail pair test bed. Force-applying heads (force-applying points) of a transverse loading mechanism and a vertical loading mechanism independently use or share a lead screw driving mechanism so that the transverse loading mechanism and the vertical loading mechanism move synchronously along with a stressed sliding table and the force-applying points are relatively stationary with four guide rail sliding blocks. Therefore, loads applied by a force-applying device can be uniformly and invariably acted on the four guide rail sliding blocks. The load born by each guide rail sliding block is 1 / 4 of that applied by the fore-applying device, namely, change curves of the loads born by the guide rail sliding blocks are completely consistent with the change curves of force applied by the force-applying device, only the amplitude is reduced to 1 / 4. Therefore, when the load controllable active type follow-up force-applying linear guide rail pair test bed is used for carrying out a performance and service life test on the linear guide rail pair, the load applied can be conveniently, precisely and reliably controlled so as to relatively accurately and reliably evaluate a relationship among the load, the performance and service life of the linear guide rail pair, thus providing a relatively reliable test basis for design and maintenance of the guide rail pair.