5results about How to "Solving Concentricity Problems" patented technology

The middle hole water-through automatic tool-changing high-speed electric spindle includes a housing and a spindle. A pull rod is inserted in the hollow structure of the spindle. A pull claw is connected to the front end of the pull rod. A disc spring is inserted on the pull rod. A sealing locating sleeve is screwed to the other end of the disc spring. A rotary joint is connected to the rear end of the pull rod behind the sealing locating sleeve. The center of the pull rod has a cooling water channel. The center of the cylinder rod of the knife-beating cylinder is a cavity. A pull rod rear support bearing is arranged in the cavity. The knife-beating cylinder is fixedly connected to the rear end of the housing. The air seal ring consists of an outer ring and an inner ring fixed to the outer ring. A support sleeve is fixedly connected to the rear end of the knife-beating cylinder. Two sealing ring grooves are opened in the mounting circular hole of the support sleeve. Sealing rings are installed in the sealing ring grooves. The interference between the rotary joint and the sealing ring is 0.25mm to 0.35mm. After testing, this electric spindle can achieve the performance of similar foreign products.

The oil pump comprises an oil suction pipe, an oil suction pipe core, a supporting rod and a sling, the oil suction pipe core is inserted into the oil suction pipe, the oil suction pipe core is in clearance fit with the oil suction pipe, and a spirally-rising oil groove is formed between the oil suction pipe core and the oil suction pipe. A ball head sleeve is arranged in a pipe hole of the oil suction pipe core, one end of the supporting rod is connected with and supports the sling, and the other end of the supporting rod extends into the pipe hole of the oil suction pipe core from a pipe opening of the oil suction pipe core and is provided with a ball head matched with the ball head sleeve. The oil suction pipe core and the oil suction pipe directly have ultrahigh coaxiality, abnormal contact is avoided, connection is reliable after assembly, and noise and abrasion are effectively avoided. Meanwhile, on the basis of the scheme, the oil suction pipe core and the oil suction pipe can be designed to be longer, and the oil pumping capacity of the oil pump is greatly improved.

The utility model discloses a laser module and a single-point laser radar, a penetrating optical cavity is arranged on an optical lens base, a lens and a laser are coaxially assembled in the optical cavity, the optical lens base, the laser and the lens are assembled into an optical mechanism, then a circuit board is connected with the optical lens base, the laser and the circuit board are welded, and the single-point laser radar is obtained. The laser is firstly integrated into the optical mechanism and then is welded with the circuit board, so that the influence of the connection of the circuit board and the optical lens seat on the position of the laser can be avoided, and the tolerance between the superposed circuit board and the optical lens seat between the laser and the optical lens seat in the prior art can be improved; therefore, the coaxiality between the laser and the lens is prevented from being influenced, and the accuracy of the radar is ensured.

The utility model discloses a coaxial positioning device in the press fitting process of a steel-plastic conversion pipe fitting, and belongs to the technical field of coaxial positioning devices. The tool comprises a plastic part positioning tool and a steel pipe part positioning tool connected with the plastic part positioning tool, positioning holes are formed in the plastic part positioning tool and the steel pipe part positioning tool, the sizes of the two positioning holes correspond to those of a plastic part and a steel pipe part respectively, and the two positioning holes are coaxially arranged; the plastic part positioning tool and the steel pipe part positioning tool are both of an assembled structure. According to the utility model, improvement is carried out on the basis of a vertical hydraulic machine combined tool, and the coaxial positioning device is arranged based on the PE part and the steel pipe part, so that the problem of coaxiality of products can be effectively solved, and equipment does not need to be purchased again; and the equipment modification cost is reduced to the greatest extent.

A telescopic self-aligning structure for a shaft includes a rod, a shaft, and a self-aligning assembly. One end of the rod has a guide hole with a limiting hole at its bottom. The shaft is located within the guide hole and includes a limiting end that slides into the limiting hole and a telescopic boss located at the opening of the guide hole. The self-aligning assembly includes a spring, a limiting ring, and a self-aligning ring sequentially sleeved on the shaft. One end of the spring abuts against the bottom of the guide hole, and the other end abuts against one side of the limiting ring. The inner circumferential wall of the limiting ring slides with the shaft, while its outer circumferential wall has a gap with the guide hole. The inner circumferential wall of the self-aligning ring has a gap with the shaft, and its outer circumferential wall slides with the guide hole. The side of the self-aligning ring facing the limiting ring has a conical surface, and the other side of the limiting ring abuts against the conical surface. The side of the self-aligning ring facing away from the limiting ring abuts against the telescopic boss. This solution, by adding a self-aligning assembly within the guide hole of the rod, ensures the concentricity of the limiting ring and the shaft relative to the guide hole.